Merge commit 'jk/jk-merge'
[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/version.h>
39 #include <linux/clk.h>
40
41 #include <linux/debugfs.h>
42 #include <linux/seq_file.h>
43
44 #include <linux/usb.h>
45 #include <linux/usb/gadget.h>
46
47 #include <asm/byteorder.h>
48 #include <asm/io.h>
49 #include <asm/irq.h>
50 #include <asm/system.h>
51 #include <asm/unaligned.h>
52 #include <asm/arch/irqs.h>
53
54 #include <asm/arch/hardware.h>
55 #include <asm/arch/regs-gpio.h>
56
57 #include <asm/plat-s3c24xx/regs-udc.h>
58 #include <asm/plat-s3c24xx/udc.h>
59
60 #include <asm/mach-types.h>
61
62 #include "s3c2410_udc.h"
63
64 #define DRIVER_DESC     "S3C2410 USB Device Controller Gadget"
65 #define DRIVER_VERSION  "29 Apr 2007"
66 #define DRIVER_AUTHOR   "Herbert Pötzl <herbert@13thfloor.at>, " \
67                         "Arnaud Patard <arnaud.patard@rtp-net.org>"
68
69 static const char               gadget_name[] = "s3c2410_udc";
70 static const char               driver_desc[] = DRIVER_DESC;
71
72 static struct s3c2410_udc       *the_controller;
73 static struct clk               *udc_clock;
74 static struct clk               *usb_bus_clock;
75 static void __iomem             *base_addr;
76 static u64                      rsrc_start;
77 static u64                      rsrc_len;
78 static struct dentry            *s3c2410_udc_debugfs_root;
79
80 static inline u32 udc_read(u32 reg)
81 {
82         return readb(base_addr + reg);
83 }
84
85 static inline void udc_write(u32 value, u32 reg)
86 {
87         writeb(value, base_addr + reg);
88 }
89
90 static inline void udc_writeb(void __iomem *base, u32 value, u32 reg)
91 {
92         writeb(value, base + reg);
93 }
94
95 static struct s3c2410_udc_mach_info *udc_info;
96
97 /*************************** DEBUG FUNCTION ***************************/
98 #define DEBUG_NORMAL    1
99 #define DEBUG_VERBOSE   2
100
101 #ifdef CONFIG_USB_S3C2410_DEBUG
102 #define USB_S3C2410_DEBUG_LEVEL 0
103
104 static uint32_t s3c2410_ticks = 0;
105
106 static int dprintk(int level, const char *fmt, ...)
107 {
108         static char printk_buf[1024];
109         static long prevticks;
110         static int invocation;
111         va_list args;
112         int len;
113
114         if (level > USB_S3C2410_DEBUG_LEVEL)
115                 return 0;
116
117         if (s3c2410_ticks != prevticks) {
118                 prevticks = s3c2410_ticks;
119                 invocation = 0;
120         }
121
122         len = scnprintf(printk_buf,
123                         sizeof(printk_buf), "%1lu.%02d USB: ",
124                         prevticks, invocation++);
125
126         va_start(args, fmt);
127         len = vscnprintf(printk_buf+len,
128                         sizeof(printk_buf)-len, fmt, args);
129         va_end(args);
130
131         return printk(KERN_DEBUG "%s", printk_buf);
132 }
133 #else
134 static int dprintk(int level, const char *fmt, ...)
135 {
136         return 0;
137 }
138 #endif
139 static int s3c2410_udc_debugfs_seq_show(struct seq_file *m, void *p)
140 {
141         u32 addr_reg,pwr_reg,ep_int_reg,usb_int_reg;
142         u32 ep_int_en_reg, usb_int_en_reg, ep0_csr;
143         u32 ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2;
144         u32 ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2;
145
146         addr_reg       = udc_read(S3C2410_UDC_FUNC_ADDR_REG);
147         pwr_reg        = udc_read(S3C2410_UDC_PWR_REG);
148         ep_int_reg     = udc_read(S3C2410_UDC_EP_INT_REG);
149         usb_int_reg    = udc_read(S3C2410_UDC_USB_INT_REG);
150         ep_int_en_reg  = udc_read(S3C2410_UDC_EP_INT_EN_REG);
151         usb_int_en_reg = udc_read(S3C2410_UDC_USB_INT_EN_REG);
152         udc_write(0, S3C2410_UDC_INDEX_REG);
153         ep0_csr        = udc_read(S3C2410_UDC_IN_CSR1_REG);
154         udc_write(1, S3C2410_UDC_INDEX_REG);
155         ep1_i_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
156         ep1_i_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
157         ep1_o_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
158         ep1_o_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
159         udc_write(2, S3C2410_UDC_INDEX_REG);
160         ep2_i_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
161         ep2_i_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
162         ep2_o_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
163         ep2_o_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
164
165         seq_printf(m, "FUNC_ADDR_REG  : 0x%04X\n"
166                  "PWR_REG        : 0x%04X\n"
167                  "EP_INT_REG     : 0x%04X\n"
168                  "USB_INT_REG    : 0x%04X\n"
169                  "EP_INT_EN_REG  : 0x%04X\n"
170                  "USB_INT_EN_REG : 0x%04X\n"
171                  "EP0_CSR        : 0x%04X\n"
172                  "EP1_I_CSR1     : 0x%04X\n"
173                  "EP1_I_CSR2     : 0x%04X\n"
174                  "EP1_O_CSR1     : 0x%04X\n"
175                  "EP1_O_CSR2     : 0x%04X\n"
176                  "EP2_I_CSR1     : 0x%04X\n"
177                  "EP2_I_CSR2     : 0x%04X\n"
178                  "EP2_O_CSR1     : 0x%04X\n"
179                  "EP2_O_CSR2     : 0x%04X\n",
180                         addr_reg,pwr_reg,ep_int_reg,usb_int_reg,
181                         ep_int_en_reg, usb_int_en_reg, ep0_csr,
182                         ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2,
183                         ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2
184                 );
185
186         return 0;
187 }
188
189 static int s3c2410_udc_debugfs_fops_open(struct inode *inode,
190                                          struct file *file)
191 {
192         return single_open(file, s3c2410_udc_debugfs_seq_show, NULL);
193 }
194
195 static const struct file_operations s3c2410_udc_debugfs_fops = {
196         .open           = s3c2410_udc_debugfs_fops_open,
197         .read           = seq_read,
198         .llseek         = seq_lseek,
199         .release        = single_release,
200         .owner          = THIS_MODULE,
201 };
202
203 /* io macros */
204
205 static inline void s3c2410_udc_clear_ep0_opr(void __iomem *base)
206 {
207         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
208         udc_writeb(base, S3C2410_UDC_EP0_CSR_SOPKTRDY,
209                         S3C2410_UDC_EP0_CSR_REG);
210 }
211
212 static inline void s3c2410_udc_clear_ep0_sst(void __iomem *base)
213 {
214         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
215         writeb(0x00, base + S3C2410_UDC_EP0_CSR_REG);
216 }
217
218 static inline void s3c2410_udc_clear_ep0_se(void __iomem *base)
219 {
220         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
221         udc_writeb(base, S3C2410_UDC_EP0_CSR_SSE, S3C2410_UDC_EP0_CSR_REG);
222 }
223
224 static inline void s3c2410_udc_set_ep0_ipr(void __iomem *base)
225 {
226         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
227         udc_writeb(base, S3C2410_UDC_EP0_CSR_IPKRDY, S3C2410_UDC_EP0_CSR_REG);
228 }
229
230 static inline void s3c2410_udc_set_ep0_de(void __iomem *base)
231 {
232         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
233         udc_writeb(base, S3C2410_UDC_EP0_CSR_DE, S3C2410_UDC_EP0_CSR_REG);
234 }
235
236 inline void s3c2410_udc_set_ep0_ss(void __iomem *b)
237 {
238         udc_writeb(b, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
239         udc_writeb(b, S3C2410_UDC_EP0_CSR_SENDSTL, S3C2410_UDC_EP0_CSR_REG);
240 }
241
242 static inline void s3c2410_udc_set_ep0_de_out(void __iomem *base)
243 {
244         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
245
246         udc_writeb(base,(S3C2410_UDC_EP0_CSR_SOPKTRDY
247                                 | S3C2410_UDC_EP0_CSR_DE),
248                         S3C2410_UDC_EP0_CSR_REG);
249 }
250
251 static inline void s3c2410_udc_set_ep0_sse_out(void __iomem *base)
252 {
253         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
254         udc_writeb(base, (S3C2410_UDC_EP0_CSR_SOPKTRDY
255                                 | S3C2410_UDC_EP0_CSR_SSE),
256                         S3C2410_UDC_EP0_CSR_REG);
257 }
258
259 static inline void s3c2410_udc_set_ep0_de_in(void __iomem *base)
260 {
261         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
262         udc_writeb(base, (S3C2410_UDC_EP0_CSR_IPKRDY
263                         | S3C2410_UDC_EP0_CSR_DE),
264                 S3C2410_UDC_EP0_CSR_REG);
265 }
266
267 /*------------------------- I/O ----------------------------------*/
268
269 /*
270  *      s3c2410_udc_done
271  */
272 static void s3c2410_udc_done(struct s3c2410_ep *ep,
273                 struct s3c2410_request *req, int status)
274 {
275         unsigned halted = ep->halted;
276
277         list_del_init(&req->queue);
278
279         if (likely (req->req.status == -EINPROGRESS))
280                 req->req.status = status;
281         else
282                 status = req->req.status;
283
284         ep->halted = 1;
285         req->req.complete(&ep->ep, &req->req);
286         ep->halted = halted;
287 }
288
289 static void s3c2410_udc_nuke(struct s3c2410_udc *udc,
290                 struct s3c2410_ep *ep, int status)
291 {
292         /* Sanity check */
293         if (&ep->queue == NULL)
294                 return;
295
296         while (!list_empty (&ep->queue)) {
297                 struct s3c2410_request *req;
298                 req = list_entry (ep->queue.next, struct s3c2410_request,
299                                 queue);
300                 s3c2410_udc_done(ep, req, status);
301         }
302 }
303
304 static inline void s3c2410_udc_clear_ep_state(struct s3c2410_udc *dev)
305 {
306         unsigned i;
307
308         /* hardware SET_{CONFIGURATION,INTERFACE} automagic resets endpoint
309          * fifos, and pending transactions mustn't be continued in any case.
310          */
311
312         for (i = 1; i < S3C2410_ENDPOINTS; i++)
313                 s3c2410_udc_nuke(dev, &dev->ep[i], -ECONNABORTED);
314 }
315
316 static inline int s3c2410_udc_fifo_count_out(void)
317 {
318         int tmp;
319
320         tmp = udc_read(S3C2410_UDC_OUT_FIFO_CNT2_REG) << 8;
321         tmp |= udc_read(S3C2410_UDC_OUT_FIFO_CNT1_REG);
322         return tmp;
323 }
324
325 /*
326  *      s3c2410_udc_write_packet
327  */
328 static inline int s3c2410_udc_write_packet(int fifo,
329                 struct s3c2410_request *req,
330                 unsigned max)
331 {
332         unsigned len = min(req->req.length - req->req.actual, max);
333         u8 *buf = req->req.buf + req->req.actual;
334
335         prefetch(buf);
336
337         dprintk(DEBUG_VERBOSE, "%s %d %d %d %d\n", __func__,
338                 req->req.actual, req->req.length, len, req->req.actual + len);
339
340         req->req.actual += len;
341
342         udelay(5);
343         writesb(base_addr + fifo, buf, len);
344         return len;
345 }
346
347 /*
348  *      s3c2410_udc_write_fifo
349  *
350  * return:  0 = still running, 1 = completed, negative = errno
351  */
352 static int s3c2410_udc_write_fifo(struct s3c2410_ep *ep,
353                 struct s3c2410_request *req)
354 {
355         unsigned        count;
356         int             is_last;
357         u32             idx;
358         int             fifo_reg;
359         u32             ep_csr;
360
361         idx = ep->bEndpointAddress & 0x7F;
362         switch (idx) {
363         default:
364                 idx = 0;
365         case 0:
366                 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
367                 break;
368         case 1:
369                 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
370                 break;
371         case 2:
372                 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
373                 break;
374         case 3:
375                 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
376                 break;
377         case 4:
378                 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
379                 break;
380         }
381
382         count = s3c2410_udc_write_packet(fifo_reg, req, ep->ep.maxpacket);
383
384         /* last packet is often short (sometimes a zlp) */
385         if (count != ep->ep.maxpacket)
386                 is_last = 1;
387         else if (req->req.length != req->req.actual || req->req.zero)
388                 is_last = 0;
389         else
390                 is_last = 2;
391
392         /* Only ep0 debug messages are interesting */
393         if (idx == 0)
394                 dprintk(DEBUG_NORMAL,
395                         "Written ep%d %d.%d of %d b [last %d,z %d]\n",
396                         idx, count, req->req.actual, req->req.length,
397                         is_last, req->req.zero);
398
399         if (is_last) {
400                 /* The order is important. It prevents sending 2 packets
401                  * at the same time */
402
403                 if (idx == 0) {
404                         /* Reset signal => no need to say 'data sent' */
405                         if (! (udc_read(S3C2410_UDC_USB_INT_REG)
406                                         & S3C2410_UDC_USBINT_RESET))
407                                 s3c2410_udc_set_ep0_de_in(base_addr);
408                         ep->dev->ep0state=EP0_IDLE;
409                 } else {
410                         udc_write(idx, S3C2410_UDC_INDEX_REG);
411                         ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
412                         udc_write(idx, S3C2410_UDC_INDEX_REG);
413                         udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
414                                         S3C2410_UDC_IN_CSR1_REG);
415                 }
416
417                 s3c2410_udc_done(ep, req, 0);
418                 is_last = 1;
419         } else {
420                 if (idx == 0) {
421                         /* Reset signal => no need to say 'data sent' */
422                         if (! (udc_read(S3C2410_UDC_USB_INT_REG)
423                                         & S3C2410_UDC_USBINT_RESET))
424                                 s3c2410_udc_set_ep0_ipr(base_addr);
425                 } else {
426                         udc_write(idx, S3C2410_UDC_INDEX_REG);
427                         ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
428                         udc_write(idx, S3C2410_UDC_INDEX_REG);
429                         udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
430                                         S3C2410_UDC_IN_CSR1_REG);
431                 }
432         }
433
434         return is_last;
435 }
436
437 static inline int s3c2410_udc_read_packet(int fifo, u8 *buf,
438                 struct s3c2410_request *req, unsigned avail)
439 {
440         unsigned len;
441
442         len = min(req->req.length - req->req.actual, avail);
443         req->req.actual += len;
444
445         readsb(fifo + base_addr, buf, len);
446         return len;
447 }
448
449 /*
450  * return:  0 = still running, 1 = queue empty, negative = errno
451  */
452 static int s3c2410_udc_read_fifo(struct s3c2410_ep *ep,
453                                  struct s3c2410_request *req)
454 {
455         u8              *buf;
456         u32             ep_csr;
457         unsigned        bufferspace;
458         int             is_last=1;
459         unsigned        avail;
460         int             fifo_count = 0;
461         u32             idx;
462         int             fifo_reg;
463
464         idx = ep->bEndpointAddress & 0x7F;
465
466         switch (idx) {
467         default:
468                 idx = 0;
469         case 0:
470                 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
471                 break;
472         case 1:
473                 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
474                 break;
475         case 2:
476                 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
477                 break;
478         case 3:
479                 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
480                 break;
481         case 4:
482                 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
483                 break;
484         }
485
486         if (!req->req.length)
487                 return 1;
488
489         buf = req->req.buf + req->req.actual;
490         bufferspace = req->req.length - req->req.actual;
491         if (!bufferspace) {
492                 dprintk(DEBUG_NORMAL, "%s: buffer full!\n", __func__);
493                 return -1;
494         }
495
496         udc_write(idx, S3C2410_UDC_INDEX_REG);
497
498         fifo_count = s3c2410_udc_fifo_count_out();
499         dprintk(DEBUG_NORMAL, "%s fifo count : %d\n", __func__, fifo_count);
500
501         if (fifo_count > ep->ep.maxpacket)
502                 avail = ep->ep.maxpacket;
503         else
504                 avail = fifo_count;
505
506         fifo_count = s3c2410_udc_read_packet(fifo_reg, buf, req, avail);
507
508         /* checking this with ep0 is not accurate as we already
509          * read a control request
510          **/
511         if (idx != 0 && fifo_count < ep->ep.maxpacket) {
512                 is_last = 1;
513                 /* overflowed this request?  flush extra data */
514                 if (fifo_count != avail)
515                         req->req.status = -EOVERFLOW;
516         } else {
517                 is_last = (req->req.length <= req->req.actual) ? 1 : 0;
518         }
519
520         udc_write(idx, S3C2410_UDC_INDEX_REG);
521         fifo_count = s3c2410_udc_fifo_count_out();
522
523         /* Only ep0 debug messages are interesting */
524         if (idx == 0)
525                 dprintk(DEBUG_VERBOSE, "%s fifo count : %d [last %d]\n",
526                         __func__, fifo_count,is_last);
527
528         if (is_last) {
529                 if (idx == 0) {
530                         s3c2410_udc_set_ep0_de_out(base_addr);
531                         ep->dev->ep0state = EP0_IDLE;
532                 } else {
533                         udc_write(idx, S3C2410_UDC_INDEX_REG);
534                         ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
535                         udc_write(idx, S3C2410_UDC_INDEX_REG);
536                         udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
537                                         S3C2410_UDC_OUT_CSR1_REG);
538                 }
539
540                 s3c2410_udc_done(ep, req, 0);
541         } else {
542                 if (idx == 0) {
543                         s3c2410_udc_clear_ep0_opr(base_addr);
544                 } else {
545                         udc_write(idx, S3C2410_UDC_INDEX_REG);
546                         ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
547                         udc_write(idx, S3C2410_UDC_INDEX_REG);
548                         udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
549                                         S3C2410_UDC_OUT_CSR1_REG);
550                 }
551         }
552
553         return is_last;
554 }
555
556 static int s3c2410_udc_read_fifo_crq(struct usb_ctrlrequest *crq)
557 {
558         unsigned char *outbuf = (unsigned char*)crq;
559         int bytes_read = 0;
560
561         udc_write(0, S3C2410_UDC_INDEX_REG);
562
563         bytes_read = s3c2410_udc_fifo_count_out();
564
565         dprintk(DEBUG_NORMAL, "%s: fifo_count=%d\n", __func__, bytes_read);
566
567         if (bytes_read > sizeof(struct usb_ctrlrequest))
568                 bytes_read = sizeof(struct usb_ctrlrequest);
569
570         readsb(S3C2410_UDC_EP0_FIFO_REG + base_addr, outbuf, bytes_read);
571
572         dprintk(DEBUG_VERBOSE, "%s: len=%d %02x:%02x {%x,%x,%x}\n", __func__,
573                 bytes_read, crq->bRequest, crq->bRequestType,
574                 crq->wValue, crq->wIndex, crq->wLength);
575
576         return bytes_read;
577 }
578
579 static int s3c2410_udc_get_status(struct s3c2410_udc *dev,
580                 struct usb_ctrlrequest *crq)
581 {
582         u16 status = 0;
583         u8 ep_num = crq->wIndex & 0x7F;
584         u8 is_in = crq->wIndex & USB_DIR_IN;
585
586         switch (crq->bRequestType & USB_RECIP_MASK) {
587         case USB_RECIP_INTERFACE:
588                 break;
589
590         case USB_RECIP_DEVICE:
591                 status = dev->devstatus;
592                 break;
593
594         case USB_RECIP_ENDPOINT:
595                 if (ep_num > 4 || crq->wLength > 2)
596                         return 1;
597
598                 if (ep_num == 0) {
599                         udc_write(0, S3C2410_UDC_INDEX_REG);
600                         status = udc_read(S3C2410_UDC_IN_CSR1_REG);
601                         status = status & S3C2410_UDC_EP0_CSR_SENDSTL;
602                 } else {
603                         udc_write(ep_num, S3C2410_UDC_INDEX_REG);
604                         if (is_in) {
605                                 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
606                                 status = status & S3C2410_UDC_ICSR1_SENDSTL;
607                         } else {
608                                 status = udc_read(S3C2410_UDC_OUT_CSR1_REG);
609                                 status = status & S3C2410_UDC_OCSR1_SENDSTL;
610                         }
611                 }
612
613                 status = status ? 1 : 0;
614                 break;
615
616         default:
617                 return 1;
618         }
619
620         /* Seems to be needed to get it working. ouch :( */
621         udelay(5);
622         udc_write(status & 0xFF, S3C2410_UDC_EP0_FIFO_REG);
623         udc_write(status >> 8, S3C2410_UDC_EP0_FIFO_REG);
624         s3c2410_udc_set_ep0_de_in(base_addr);
625
626         return 0;
627 }
628 /*------------------------- usb state machine -------------------------------*/
629 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value);
630
631 static void s3c2410_udc_handle_ep0_idle(struct s3c2410_udc *dev,
632                                         struct s3c2410_ep *ep,
633                                         struct usb_ctrlrequest *crq,
634                                         u32 ep0csr)
635 {
636         int len, ret, tmp;
637
638         /* start control request? */
639         if (!(ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY))
640                 return;
641
642         s3c2410_udc_nuke(dev, ep, -EPROTO);
643
644         len = s3c2410_udc_read_fifo_crq(crq);
645         if (len != sizeof(*crq)) {
646                 dprintk(DEBUG_NORMAL, "setup begin: fifo READ ERROR"
647                         " wanted %d bytes got %d. Stalling out...\n",
648                         sizeof(*crq), len);
649                 s3c2410_udc_set_ep0_ss(base_addr);
650                 return;
651         }
652
653         dprintk(DEBUG_NORMAL, "bRequest = %d bRequestType %d wLength = %d\n",
654                 crq->bRequest, crq->bRequestType, crq->wLength);
655
656         /* cope with automagic for some standard requests. */
657         dev->req_std = (crq->bRequestType & USB_TYPE_MASK)
658                 == USB_TYPE_STANDARD;
659         dev->req_config = 0;
660         dev->req_pending = 1;
661
662         switch (crq->bRequest) {
663         case USB_REQ_SET_CONFIGURATION:
664                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_CONFIGURATION ... \n");
665
666                 if (crq->bRequestType == USB_RECIP_DEVICE) {
667                         dev->req_config = 1;
668                         s3c2410_udc_set_ep0_de_out(base_addr);
669                 }
670                 break;
671
672         case USB_REQ_SET_INTERFACE:
673                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_INTERFACE ... \n");
674
675                 if (crq->bRequestType == USB_RECIP_INTERFACE) {
676                         dev->req_config = 1;
677                         s3c2410_udc_set_ep0_de_out(base_addr);
678                 }
679                 break;
680
681         case USB_REQ_SET_ADDRESS:
682                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_ADDRESS ... \n");
683
684                 if (crq->bRequestType == USB_RECIP_DEVICE) {
685                         tmp = crq->wValue & 0x7F;
686                         dev->address = tmp;
687                         udc_write((tmp | S3C2410_UDC_FUNCADDR_UPDATE),
688                                         S3C2410_UDC_FUNC_ADDR_REG);
689                         s3c2410_udc_set_ep0_de_out(base_addr);
690                         return;
691                 }
692                 break;
693
694         case USB_REQ_GET_STATUS:
695                 dprintk(DEBUG_NORMAL, "USB_REQ_GET_STATUS ... \n");
696                 s3c2410_udc_clear_ep0_opr(base_addr);
697
698                 if (dev->req_std) {
699                         if (!s3c2410_udc_get_status(dev, crq)) {
700                                 return;
701                         }
702                 }
703                 break;
704
705         case USB_REQ_CLEAR_FEATURE:
706                 s3c2410_udc_clear_ep0_opr(base_addr);
707
708                 if (crq->bRequestType != USB_RECIP_ENDPOINT)
709                         break;
710
711                 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
712                         break;
713
714                 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 0);
715                 s3c2410_udc_set_ep0_de_out(base_addr);
716                 return;
717
718         case USB_REQ_SET_FEATURE:
719                 s3c2410_udc_clear_ep0_opr(base_addr);
720
721                 if (crq->bRequestType != USB_RECIP_ENDPOINT)
722                         break;
723
724                 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
725                         break;
726
727                 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 1);
728                 s3c2410_udc_set_ep0_de_out(base_addr);
729                 return;
730
731         default:
732                 s3c2410_udc_clear_ep0_opr(base_addr);
733                 break;
734         }
735
736         if (crq->bRequestType & USB_DIR_IN)
737                 dev->ep0state = EP0_IN_DATA_PHASE;
738         else
739                 dev->ep0state = EP0_OUT_DATA_PHASE;
740
741         ret = dev->driver->setup(&dev->gadget, crq);
742         if (ret < 0) {
743                 if (dev->req_config) {
744                         dprintk(DEBUG_NORMAL, "config change %02x fail %d?\n",
745                                 crq->bRequest, ret);
746                         return;
747                 }
748
749                 if (ret == -EOPNOTSUPP)
750                         dprintk(DEBUG_NORMAL, "Operation not supported\n");
751                 else
752                         dprintk(DEBUG_NORMAL,
753                                 "dev->driver->setup failed. (%d)\n", ret);
754
755                 udelay(5);
756                 s3c2410_udc_set_ep0_ss(base_addr);
757                 s3c2410_udc_set_ep0_de_out(base_addr);
758                 dev->ep0state = EP0_IDLE;
759                 /* deferred i/o == no response yet */
760         } else if (dev->req_pending) {
761                 dprintk(DEBUG_VERBOSE, "dev->req_pending... what now?\n");
762                 dev->req_pending=0;
763         }
764
765         dprintk(DEBUG_VERBOSE, "ep0state %s\n", ep0states[dev->ep0state]);
766 }
767
768 static void s3c2410_udc_handle_ep0(struct s3c2410_udc *dev)
769 {
770         u32                     ep0csr;
771         struct s3c2410_ep       *ep = &dev->ep[0];
772         struct s3c2410_request  *req;
773         struct usb_ctrlrequest  crq;
774
775         if (list_empty(&ep->queue))
776                 req = NULL;
777         else
778                 req = list_entry(ep->queue.next, struct s3c2410_request, queue);
779
780         /* We make the assumption that S3C2410_UDC_IN_CSR1_REG equal to
781          * S3C2410_UDC_EP0_CSR_REG when index is zero */
782
783         udc_write(0, S3C2410_UDC_INDEX_REG);
784         ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
785
786         dprintk(DEBUG_NORMAL, "ep0csr %x ep0state %s\n",
787                 ep0csr, ep0states[dev->ep0state]);
788
789         /* clear stall status */
790         if (ep0csr & S3C2410_UDC_EP0_CSR_SENTSTL) {
791                 s3c2410_udc_nuke(dev, ep, -EPIPE);
792                 dprintk(DEBUG_NORMAL, "... clear SENT_STALL ...\n");
793                 s3c2410_udc_clear_ep0_sst(base_addr);
794                 dev->ep0state = EP0_IDLE;
795                 return;
796         }
797
798         /* clear setup end */
799         if (ep0csr & S3C2410_UDC_EP0_CSR_SE) {
800                 dprintk(DEBUG_NORMAL, "... serviced SETUP_END ...\n");
801                 s3c2410_udc_nuke(dev, ep, 0);
802                 s3c2410_udc_clear_ep0_se(base_addr);
803                 dev->ep0state = EP0_IDLE;
804         }
805
806         switch (dev->ep0state) {
807         case EP0_IDLE:
808                 s3c2410_udc_handle_ep0_idle(dev, ep, &crq, ep0csr);
809                 break;
810
811         case EP0_IN_DATA_PHASE:                 /* GET_DESCRIPTOR etc */
812                 dprintk(DEBUG_NORMAL, "EP0_IN_DATA_PHASE ... what now?\n");
813                 if (!(ep0csr & S3C2410_UDC_EP0_CSR_IPKRDY) && req) {
814                         s3c2410_udc_write_fifo(ep, req);
815                 }
816                 break;
817
818         case EP0_OUT_DATA_PHASE:                /* SET_DESCRIPTOR etc */
819                 dprintk(DEBUG_NORMAL, "EP0_OUT_DATA_PHASE ... what now?\n");
820                 if ((ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY) && req ) {
821                         s3c2410_udc_read_fifo(ep,req);
822                 }
823                 break;
824
825         case EP0_END_XFER:
826                 dprintk(DEBUG_NORMAL, "EP0_END_XFER ... what now?\n");
827                 dev->ep0state = EP0_IDLE;
828                 break;
829
830         case EP0_STALL:
831                 dprintk(DEBUG_NORMAL, "EP0_STALL ... what now?\n");
832                 dev->ep0state = EP0_IDLE;
833                 break;
834         }
835 }
836
837 /*
838  *      handle_ep - Manage I/O endpoints
839  */
840
841 static void s3c2410_udc_handle_ep(struct s3c2410_ep *ep)
842 {
843         struct s3c2410_request  *req;
844         int                     is_in = ep->bEndpointAddress & USB_DIR_IN;
845         u32                     ep_csr1;
846         u32                     idx;
847
848         if (likely (!list_empty(&ep->queue)))
849                 req = list_entry(ep->queue.next,
850                                 struct s3c2410_request, queue);
851         else
852                 req = NULL;
853
854         idx = ep->bEndpointAddress & 0x7F;
855
856         if (is_in) {
857                 udc_write(idx, S3C2410_UDC_INDEX_REG);
858                 ep_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
859                 dprintk(DEBUG_VERBOSE, "ep%01d write csr:%02x %d\n",
860                         idx, ep_csr1, req ? 1 : 0);
861
862                 if (ep_csr1 & S3C2410_UDC_ICSR1_SENTSTL) {
863                         dprintk(DEBUG_VERBOSE, "st\n");
864                         udc_write(idx, S3C2410_UDC_INDEX_REG);
865                         udc_write(ep_csr1 & ~S3C2410_UDC_ICSR1_SENTSTL,
866                                         S3C2410_UDC_IN_CSR1_REG);
867                         return;
868                 }
869
870                 if (!(ep_csr1 & S3C2410_UDC_ICSR1_PKTRDY) && req) {
871                         s3c2410_udc_write_fifo(ep,req);
872                 }
873         } else {
874                 udc_write(idx, S3C2410_UDC_INDEX_REG);
875                 ep_csr1 = udc_read(S3C2410_UDC_OUT_CSR1_REG);
876                 dprintk(DEBUG_VERBOSE, "ep%01d rd csr:%02x\n", idx, ep_csr1);
877
878                 if (ep_csr1 & S3C2410_UDC_OCSR1_SENTSTL) {
879                         udc_write(idx, S3C2410_UDC_INDEX_REG);
880                         udc_write(ep_csr1 & ~S3C2410_UDC_OCSR1_SENTSTL,
881                                         S3C2410_UDC_OUT_CSR1_REG);
882                         return;
883                 }
884
885                 if ((ep_csr1 & S3C2410_UDC_OCSR1_PKTRDY) && req) {
886                         s3c2410_udc_read_fifo(ep,req);
887                 }
888         }
889 }
890
891 #include <asm/arch/regs-irq.h>
892
893 /*
894  *      s3c2410_udc_irq - interrupt handler
895  */
896 static irqreturn_t s3c2410_udc_irq(int dummy, void *_dev)
897 {
898         struct s3c2410_udc *dev = _dev;
899         int usb_status;
900         int usbd_status;
901         int pwr_reg;
902         int ep0csr;
903         int i;
904         u32 idx;
905         unsigned long flags;
906
907         spin_lock_irqsave(&dev->lock, flags);
908
909         /* Driver connected ? */
910         if (!dev->driver) {
911                 /* Clear interrupts */
912                 udc_write(udc_read(S3C2410_UDC_USB_INT_REG),
913                                 S3C2410_UDC_USB_INT_REG);
914                 udc_write(udc_read(S3C2410_UDC_EP_INT_REG),
915                                 S3C2410_UDC_EP_INT_REG);
916         }
917
918         /* Save index */
919         idx = udc_read(S3C2410_UDC_INDEX_REG);
920
921         /* Read status registers */
922         usb_status = udc_read(S3C2410_UDC_USB_INT_REG);
923         usbd_status = udc_read(S3C2410_UDC_EP_INT_REG);
924         pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
925
926         udc_writeb(base_addr, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
927         ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
928
929         dprintk(DEBUG_NORMAL, "usbs=%02x, usbds=%02x, pwr=%02x ep0csr=%02x\n",
930                 usb_status, usbd_status, pwr_reg, ep0csr);
931
932         /*
933          * Now, handle interrupts. There's two types :
934          * - Reset, Resume, Suspend coming -> usb_int_reg
935          * - EP -> ep_int_reg
936          */
937
938         /* RESET */
939         if (usb_status & S3C2410_UDC_USBINT_RESET) {
940                 /* two kind of reset :
941                  * - reset start -> pwr reg = 8
942                  * - reset end   -> pwr reg = 0
943                  **/
944                 dprintk(DEBUG_NORMAL, "USB reset csr %x pwr %x\n",
945                         ep0csr, pwr_reg);
946
947                 dev->gadget.speed = USB_SPEED_UNKNOWN;
948                 udc_write(0x00, S3C2410_UDC_INDEX_REG);
949                 udc_write((dev->ep[0].ep.maxpacket & 0x7ff) >> 3,
950                                 S3C2410_UDC_MAXP_REG);
951                 dev->address = 0;
952
953                 dev->ep0state = EP0_IDLE;
954                 dev->gadget.speed = USB_SPEED_FULL;
955
956                 /* clear interrupt */
957                 udc_write(S3C2410_UDC_USBINT_RESET,
958                                 S3C2410_UDC_USB_INT_REG);
959
960                 udc_write(idx, S3C2410_UDC_INDEX_REG);
961                 spin_unlock_irqrestore(&dev->lock, flags);
962                 return IRQ_HANDLED;
963         }
964
965         /* RESUME */
966         if (usb_status & S3C2410_UDC_USBINT_RESUME) {
967                 dprintk(DEBUG_NORMAL, "USB resume\n");
968
969                 /* clear interrupt */
970                 udc_write(S3C2410_UDC_USBINT_RESUME,
971                                 S3C2410_UDC_USB_INT_REG);
972
973                 if (dev->gadget.speed != USB_SPEED_UNKNOWN
974                                 && dev->driver
975                                 && dev->driver->resume)
976                         dev->driver->resume(&dev->gadget);
977         }
978
979         /* SUSPEND */
980         if (usb_status & S3C2410_UDC_USBINT_SUSPEND) {
981                 dprintk(DEBUG_NORMAL, "USB suspend\n");
982
983                 /* clear interrupt */
984                 udc_write(S3C2410_UDC_USBINT_SUSPEND,
985                                 S3C2410_UDC_USB_INT_REG);
986
987                 if (dev->gadget.speed != USB_SPEED_UNKNOWN
988                                 && dev->driver
989                                 && dev->driver->suspend)
990                         dev->driver->suspend(&dev->gadget);
991
992                 dev->ep0state = EP0_IDLE;
993         }
994
995         /* EP */
996         /* control traffic */
997         /* check on ep0csr != 0 is not a good idea as clearing in_pkt_ready
998          * generate an interrupt
999          */
1000         if (usbd_status & S3C2410_UDC_INT_EP0) {
1001                 dprintk(DEBUG_VERBOSE, "USB ep0 irq\n");
1002                 /* Clear the interrupt bit by setting it to 1 */
1003                 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_REG);
1004                 s3c2410_udc_handle_ep0(dev);
1005         }
1006
1007         /* endpoint data transfers */
1008         for (i = 1; i < S3C2410_ENDPOINTS; i++) {
1009                 u32 tmp = 1 << i;
1010                 if (usbd_status & tmp) {
1011                         dprintk(DEBUG_VERBOSE, "USB ep%d irq\n", i);
1012
1013                         /* Clear the interrupt bit by setting it to 1 */
1014                         udc_write(tmp, S3C2410_UDC_EP_INT_REG);
1015                         s3c2410_udc_handle_ep(&dev->ep[i]);
1016                 }
1017         }
1018
1019         dprintk(DEBUG_VERBOSE, "irq: %d s3c2410_udc_done.\n", IRQ_USBD);
1020
1021         /* Restore old index */
1022         udc_write(idx, S3C2410_UDC_INDEX_REG);
1023
1024         spin_unlock_irqrestore(&dev->lock, flags);
1025
1026         return IRQ_HANDLED;
1027 }
1028 /*------------------------- s3c2410_ep_ops ----------------------------------*/
1029
1030 static inline struct s3c2410_ep *to_s3c2410_ep(struct usb_ep *ep)
1031 {
1032         return container_of(ep, struct s3c2410_ep, ep);
1033 }
1034
1035 static inline struct s3c2410_udc *to_s3c2410_udc(struct usb_gadget *gadget)
1036 {
1037         return container_of(gadget, struct s3c2410_udc, gadget);
1038 }
1039
1040 static inline struct s3c2410_request *to_s3c2410_req(struct usb_request *req)
1041 {
1042         return container_of(req, struct s3c2410_request, req);
1043 }
1044
1045 /*
1046  *      s3c2410_udc_ep_enable
1047  */
1048 static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
1049                                  const struct usb_endpoint_descriptor *desc)
1050 {
1051         struct s3c2410_udc      *dev;
1052         struct s3c2410_ep       *ep;
1053         u32                     max, tmp;
1054         unsigned long           flags;
1055         u32                     csr1,csr2;
1056         u32                     int_en_reg;
1057
1058         ep = to_s3c2410_ep(_ep);
1059
1060         if (!_ep || !desc || ep->desc
1061                         || _ep->name == ep0name
1062                         || desc->bDescriptorType != USB_DT_ENDPOINT)
1063                 return -EINVAL;
1064
1065         dev = ep->dev;
1066         if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
1067                 return -ESHUTDOWN;
1068
1069         max = le16_to_cpu(desc->wMaxPacketSize) & 0x1fff;
1070
1071         local_irq_save (flags);
1072         _ep->maxpacket = max & 0x7ff;
1073         ep->desc = desc;
1074         ep->halted = 0;
1075         ep->bEndpointAddress = desc->bEndpointAddress;
1076
1077         /* set max packet */
1078         udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1079         udc_write(max >> 3, S3C2410_UDC_MAXP_REG);
1080
1081         /* set type, direction, address; reset fifo counters */
1082         if (desc->bEndpointAddress & USB_DIR_IN) {
1083                 csr1 = S3C2410_UDC_ICSR1_FFLUSH|S3C2410_UDC_ICSR1_CLRDT;
1084                 csr2 = S3C2410_UDC_ICSR2_MODEIN|S3C2410_UDC_ICSR2_DMAIEN;
1085
1086                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1087                 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1088                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1089                 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1090         } else {
1091                 /* don't flush in fifo or it will cause endpoint interrupt */
1092                 csr1 = S3C2410_UDC_ICSR1_CLRDT;
1093                 csr2 = S3C2410_UDC_ICSR2_DMAIEN;
1094
1095                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1096                 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1097                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1098                 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1099
1100                 csr1 = S3C2410_UDC_OCSR1_FFLUSH | S3C2410_UDC_OCSR1_CLRDT;
1101                 csr2 = S3C2410_UDC_OCSR2_DMAIEN;
1102
1103                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1104                 udc_write(csr1, S3C2410_UDC_OUT_CSR1_REG);
1105                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1106                 udc_write(csr2, S3C2410_UDC_OUT_CSR2_REG);
1107         }
1108
1109         /* enable irqs */
1110         int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1111         udc_write(int_en_reg | (1 << ep->num), S3C2410_UDC_EP_INT_EN_REG);
1112
1113         /* print some debug message */
1114         tmp = desc->bEndpointAddress;
1115         dprintk (DEBUG_NORMAL, "enable %s(%d) ep%x%s-blk max %02x\n",
1116                  _ep->name,ep->num, tmp,
1117                  desc->bEndpointAddress & USB_DIR_IN ? "in" : "out", max);
1118
1119         local_irq_restore (flags);
1120         s3c2410_udc_set_halt(_ep, 0);
1121
1122         return 0;
1123 }
1124
1125 /*
1126  * s3c2410_udc_ep_disable
1127  */
1128 static int s3c2410_udc_ep_disable(struct usb_ep *_ep)
1129 {
1130         struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1131         unsigned long flags;
1132         u32 int_en_reg;
1133
1134         if (!_ep || !ep->desc) {
1135                 dprintk(DEBUG_NORMAL, "%s not enabled\n",
1136                         _ep ? ep->ep.name : NULL);
1137                 return -EINVAL;
1138         }
1139
1140         local_irq_save(flags);
1141
1142         dprintk(DEBUG_NORMAL, "ep_disable: %s\n", _ep->name);
1143
1144         ep->desc = NULL;
1145         ep->halted = 1;
1146
1147         s3c2410_udc_nuke (ep->dev, ep, -ESHUTDOWN);
1148
1149         /* disable irqs */
1150         int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1151         udc_write(int_en_reg & ~(1<<ep->num), S3C2410_UDC_EP_INT_EN_REG);
1152
1153         local_irq_restore(flags);
1154
1155         dprintk(DEBUG_NORMAL, "%s disabled\n", _ep->name);
1156
1157         return 0;
1158 }
1159
1160 /*
1161  * s3c2410_udc_alloc_request
1162  */
1163 static struct usb_request *
1164 s3c2410_udc_alloc_request(struct usb_ep *_ep, gfp_t mem_flags)
1165 {
1166         struct s3c2410_request *req;
1167
1168         dprintk(DEBUG_VERBOSE,"%s(%p,%d)\n", __func__, _ep, mem_flags);
1169
1170         if (!_ep)
1171                 return NULL;
1172
1173         req = kzalloc (sizeof(struct s3c2410_request), mem_flags);
1174         if (!req)
1175                 return NULL;
1176
1177         INIT_LIST_HEAD (&req->queue);
1178         return &req->req;
1179 }
1180
1181 /*
1182  * s3c2410_udc_free_request
1183  */
1184 static void
1185 s3c2410_udc_free_request(struct usb_ep *_ep, struct usb_request *_req)
1186 {
1187         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1188         struct s3c2410_request  *req = to_s3c2410_req(_req);
1189
1190         dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1191
1192         if (!ep || !_req || (!ep->desc && _ep->name != ep0name))
1193                 return;
1194
1195         WARN_ON (!list_empty (&req->queue));
1196         kfree(req);
1197 }
1198
1199 /*
1200  *      s3c2410_udc_queue
1201  */
1202 static int s3c2410_udc_queue(struct usb_ep *_ep, struct usb_request *_req,
1203                 gfp_t gfp_flags)
1204 {
1205         struct s3c2410_request  *req = to_s3c2410_req(_req);
1206         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1207         struct s3c2410_udc      *dev;
1208         u32                     ep_csr = 0;
1209         int                     fifo_count = 0;
1210         unsigned long           flags;
1211
1212         if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1213                 dprintk(DEBUG_NORMAL, "%s: invalid args\n", __func__);
1214                 return -EINVAL;
1215         }
1216
1217         dev = ep->dev;
1218         if (unlikely (!dev->driver
1219                         || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
1220                 return -ESHUTDOWN;
1221         }
1222
1223         local_irq_save (flags);
1224
1225         if (unlikely(!_req || !_req->complete
1226                         || !_req->buf || !list_empty(&req->queue))) {
1227                 if (!_req)
1228                         dprintk(DEBUG_NORMAL, "%s: 1 X X X\n", __func__);
1229                 else {
1230                         dprintk(DEBUG_NORMAL, "%s: 0 %01d %01d %01d\n",
1231                                 __func__, !_req->complete,!_req->buf,
1232                                 !list_empty(&req->queue));
1233                 }
1234
1235                 local_irq_restore(flags);
1236                 return -EINVAL;
1237         }
1238
1239         _req->status = -EINPROGRESS;
1240         _req->actual = 0;
1241
1242         dprintk(DEBUG_VERBOSE, "%s: ep%x len %d\n",
1243                  __func__, ep->bEndpointAddress, _req->length);
1244
1245         if (ep->bEndpointAddress) {
1246                 udc_write(ep->bEndpointAddress & 0x7F, S3C2410_UDC_INDEX_REG);
1247
1248                 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1249                                 ? S3C2410_UDC_IN_CSR1_REG
1250                                 : S3C2410_UDC_OUT_CSR1_REG);
1251                 fifo_count = s3c2410_udc_fifo_count_out();
1252         } else {
1253                 udc_write(0, S3C2410_UDC_INDEX_REG);
1254                 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
1255                 fifo_count = s3c2410_udc_fifo_count_out();
1256         }
1257
1258         /* kickstart this i/o queue? */
1259         if (list_empty(&ep->queue) && !ep->halted) {
1260                 if (ep->bEndpointAddress == 0 /* ep0 */) {
1261                         switch (dev->ep0state) {
1262                         case EP0_IN_DATA_PHASE:
1263                                 if (!(ep_csr&S3C2410_UDC_EP0_CSR_IPKRDY)
1264                                                 && s3c2410_udc_write_fifo(ep,
1265                                                         req)) {
1266                                         dev->ep0state = EP0_IDLE;
1267                                         req = NULL;
1268                                 }
1269                                 break;
1270
1271                         case EP0_OUT_DATA_PHASE:
1272                                 if ((!_req->length)
1273                                         || ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1274                                                 && s3c2410_udc_read_fifo(ep,
1275                                                         req))) {
1276                                         dev->ep0state = EP0_IDLE;
1277                                         req = NULL;
1278                                 }
1279                                 break;
1280
1281                         default:
1282                                 local_irq_restore(flags);
1283                                 return -EL2HLT;
1284                         }
1285                 } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0
1286                                 && (!(ep_csr&S3C2410_UDC_OCSR1_PKTRDY))
1287                                 && s3c2410_udc_write_fifo(ep, req)) {
1288                         req = NULL;
1289                 } else if ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1290                                 && fifo_count
1291                                 && s3c2410_udc_read_fifo(ep, req)) {
1292                         req = NULL;
1293                 }
1294         }
1295
1296         /* pio or dma irq handler advances the queue. */
1297         if (likely (req != 0))
1298                 list_add_tail(&req->queue, &ep->queue);
1299
1300         local_irq_restore(flags);
1301
1302         dprintk(DEBUG_VERBOSE, "%s ok\n", __func__);
1303         return 0;
1304 }
1305
1306 /*
1307  *      s3c2410_udc_dequeue
1308  */
1309 static int s3c2410_udc_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1310 {
1311         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1312         struct s3c2410_udc      *udc;
1313         int                     retval = -EINVAL;
1314         unsigned long           flags;
1315         struct s3c2410_request  *req = NULL;
1316
1317         dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1318
1319         if (!the_controller->driver)
1320                 return -ESHUTDOWN;
1321
1322         if (!_ep || !_req)
1323                 return retval;
1324
1325         udc = to_s3c2410_udc(ep->gadget);
1326
1327         local_irq_save (flags);
1328
1329         list_for_each_entry (req, &ep->queue, queue) {
1330                 if (&req->req == _req) {
1331                         list_del_init (&req->queue);
1332                         _req->status = -ECONNRESET;
1333                         retval = 0;
1334                         break;
1335                 }
1336         }
1337
1338         if (retval == 0) {
1339                 dprintk(DEBUG_VERBOSE,
1340                         "dequeued req %p from %s, len %d buf %p\n",
1341                         req, _ep->name, _req->length, _req->buf);
1342
1343                 s3c2410_udc_done(ep, req, -ECONNRESET);
1344         }
1345
1346         local_irq_restore (flags);
1347         return retval;
1348 }
1349
1350 /*
1351  * s3c2410_udc_set_halt
1352  */
1353 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value)
1354 {
1355         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1356         u32                     ep_csr = 0;
1357         unsigned long           flags;
1358         u32                     idx;
1359
1360         if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1361                 dprintk(DEBUG_NORMAL, "%s: inval 2\n", __func__);
1362                 return -EINVAL;
1363         }
1364
1365         local_irq_save (flags);
1366
1367         idx = ep->bEndpointAddress & 0x7F;
1368
1369         if (idx == 0) {
1370                 s3c2410_udc_set_ep0_ss(base_addr);
1371                 s3c2410_udc_set_ep0_de_out(base_addr);
1372         } else {
1373                 udc_write(idx, S3C2410_UDC_INDEX_REG);
1374                 ep_csr = udc_read((ep->bEndpointAddress &USB_DIR_IN)
1375                                 ? S3C2410_UDC_IN_CSR1_REG
1376                                 : S3C2410_UDC_OUT_CSR1_REG);
1377
1378                 if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
1379                         if (value)
1380                                 udc_write(ep_csr | S3C2410_UDC_ICSR1_SENDSTL,
1381                                         S3C2410_UDC_IN_CSR1_REG);
1382                         else {
1383                                 ep_csr &= ~S3C2410_UDC_ICSR1_SENDSTL;
1384                                 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1385                                 ep_csr |= S3C2410_UDC_ICSR1_CLRDT;
1386                                 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1387                         }
1388                 } else {
1389                         if (value)
1390                                 udc_write(ep_csr | S3C2410_UDC_OCSR1_SENDSTL,
1391                                         S3C2410_UDC_OUT_CSR1_REG);
1392                         else {
1393                                 ep_csr &= ~S3C2410_UDC_OCSR1_SENDSTL;
1394                                 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1395                                 ep_csr |= S3C2410_UDC_OCSR1_CLRDT;
1396                                 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1397                         }
1398                 }
1399         }
1400
1401         ep->halted = value ? 1 : 0;
1402         local_irq_restore (flags);
1403
1404         return 0;
1405 }
1406
1407 static const struct usb_ep_ops s3c2410_ep_ops = {
1408         .enable         = s3c2410_udc_ep_enable,
1409         .disable        = s3c2410_udc_ep_disable,
1410
1411         .alloc_request  = s3c2410_udc_alloc_request,
1412         .free_request   = s3c2410_udc_free_request,
1413
1414         .queue          = s3c2410_udc_queue,
1415         .dequeue        = s3c2410_udc_dequeue,
1416
1417         .set_halt       = s3c2410_udc_set_halt,
1418 };
1419
1420 /*------------------------- usb_gadget_ops ----------------------------------*/
1421
1422 /*
1423  *      s3c2410_udc_get_frame
1424  */
1425 static int s3c2410_udc_get_frame(struct usb_gadget *_gadget)
1426 {
1427         int tmp;
1428
1429         dprintk(DEBUG_VERBOSE, "%s()\n", __func__);
1430
1431         tmp = udc_read(S3C2410_UDC_FRAME_NUM2_REG) << 8;
1432         tmp |= udc_read(S3C2410_UDC_FRAME_NUM1_REG);
1433         return tmp;
1434 }
1435
1436 /*
1437  *      s3c2410_udc_wakeup
1438  */
1439 static int s3c2410_udc_wakeup(struct usb_gadget *_gadget)
1440 {
1441         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1442         return 0;
1443 }
1444
1445 /*
1446  *      s3c2410_udc_set_selfpowered
1447  */
1448 static int s3c2410_udc_set_selfpowered(struct usb_gadget *gadget, int value)
1449 {
1450         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1451
1452         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1453
1454         if (value)
1455                 udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
1456         else
1457                 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
1458
1459         return 0;
1460 }
1461
1462 static void s3c2410_udc_disable(struct s3c2410_udc *dev);
1463 static void s3c2410_udc_enable(struct s3c2410_udc *dev);
1464
1465 static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on)
1466 {
1467         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1468
1469         if (udc_info && udc_info->udc_command) {
1470                 if (is_on)
1471                         s3c2410_udc_enable(udc);
1472                 else {
1473                         if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
1474                                 if (udc->driver && udc->driver->disconnect)
1475                                         udc->driver->disconnect(&udc->gadget);
1476
1477                         }
1478                         s3c2410_udc_disable(udc);
1479                 }
1480         }
1481         else
1482                 return -EOPNOTSUPP;
1483
1484         return 0;
1485 }
1486
1487 static int s3c2410_udc_vbus_session(struct usb_gadget *gadget, int is_active)
1488 {
1489         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1490
1491         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1492
1493         udc->vbus = (is_active != 0);
1494         s3c2410_udc_set_pullup(udc, is_active);
1495         return 0;
1496 }
1497
1498 static int s3c2410_udc_pullup(struct usb_gadget *gadget, int is_on)
1499 {
1500         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1501
1502         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1503
1504         s3c2410_udc_set_pullup(udc, is_on ? 0 : 1);
1505         return 0;
1506 }
1507
1508 static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev)
1509 {
1510         struct s3c2410_udc      *dev = _dev;
1511         unsigned int            value;
1512
1513         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1514
1515         /* some cpus cannot read from an line configured to IRQ! */
1516         s3c2410_gpio_cfgpin(udc_info->vbus_pin, S3C2410_GPIO_INPUT);
1517         value = s3c2410_gpio_getpin(udc_info->vbus_pin);
1518         s3c2410_gpio_cfgpin(udc_info->vbus_pin, S3C2410_GPIO_SFN2);
1519
1520         if (udc_info->vbus_pin_inverted)
1521                 value = !value;
1522
1523         if (value != dev->vbus)
1524                 s3c2410_udc_vbus_session(&dev->gadget, value);
1525
1526         return IRQ_HANDLED;
1527 }
1528
1529 static int s3c2410_vbus_draw(struct usb_gadget *_gadget, unsigned ma)
1530 {
1531         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1532
1533         if (udc_info && udc_info->vbus_draw) {
1534                 udc_info->vbus_draw(ma);
1535                 return 0;
1536         }
1537
1538         return -ENOTSUPP;
1539 }
1540
1541 static const struct usb_gadget_ops s3c2410_ops = {
1542         .get_frame              = s3c2410_udc_get_frame,
1543         .wakeup                 = s3c2410_udc_wakeup,
1544         .set_selfpowered        = s3c2410_udc_set_selfpowered,
1545         .pullup                 = s3c2410_udc_pullup,
1546         .vbus_session           = s3c2410_udc_vbus_session,
1547         .vbus_draw              = s3c2410_vbus_draw,
1548 };
1549
1550 /*------------------------- gadget driver handling---------------------------*/
1551 /*
1552  * s3c2410_udc_disable
1553  */
1554 static void s3c2410_udc_disable(struct s3c2410_udc *dev)
1555 {
1556         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1557
1558         /* Disable all interrupts */
1559         udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG);
1560         udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG);
1561
1562         /* Clear the interrupt registers */
1563         udc_write(S3C2410_UDC_USBINT_RESET
1564                                 | S3C2410_UDC_USBINT_RESUME
1565                                 | S3C2410_UDC_USBINT_SUSPEND,
1566                         S3C2410_UDC_USB_INT_REG);
1567
1568         udc_write(0x1F, S3C2410_UDC_EP_INT_REG);
1569
1570         /* Good bye, cruel world */
1571         if (udc_info && udc_info->udc_command)
1572                 udc_info->udc_command(S3C2410_UDC_P_DISABLE);
1573
1574         /* Set speed to unknown */
1575         dev->gadget.speed = USB_SPEED_UNKNOWN;
1576 }
1577
1578 /*
1579  * s3c2410_udc_reinit
1580  */
1581 static void s3c2410_udc_reinit(struct s3c2410_udc *dev)
1582 {
1583         u32 i;
1584
1585         /* device/ep0 records init */
1586         INIT_LIST_HEAD (&dev->gadget.ep_list);
1587         INIT_LIST_HEAD (&dev->gadget.ep0->ep_list);
1588         dev->ep0state = EP0_IDLE;
1589
1590         for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1591                 struct s3c2410_ep *ep = &dev->ep[i];
1592
1593                 if (i != 0)
1594                         list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
1595
1596                 ep->dev = dev;
1597                 ep->desc = NULL;
1598                 ep->halted = 0;
1599                 INIT_LIST_HEAD (&ep->queue);
1600         }
1601 }
1602
1603 /*
1604  * s3c2410_udc_enable
1605  */
1606 static void s3c2410_udc_enable(struct s3c2410_udc *dev)
1607 {
1608         int i;
1609
1610         dprintk(DEBUG_NORMAL, "s3c2410_udc_enable called\n");
1611
1612         /* dev->gadget.speed = USB_SPEED_UNKNOWN; */
1613         dev->gadget.speed = USB_SPEED_FULL;
1614
1615         /* Set MAXP for all endpoints */
1616         for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1617                 udc_write(i, S3C2410_UDC_INDEX_REG);
1618                 udc_write((dev->ep[i].ep.maxpacket & 0x7ff) >> 3,
1619                                 S3C2410_UDC_MAXP_REG);
1620         }
1621
1622         /* Set default power state */
1623         udc_write(DEFAULT_POWER_STATE, S3C2410_UDC_PWR_REG);
1624
1625         /* Enable reset and suspend interrupt interrupts */
1626         udc_write(S3C2410_UDC_USBINT_RESET | S3C2410_UDC_USBINT_SUSPEND,
1627                         S3C2410_UDC_USB_INT_EN_REG);
1628
1629         /* Enable ep0 interrupt */
1630         udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG);
1631
1632         /* time to say "hello, world" */
1633         if (udc_info && udc_info->udc_command)
1634                 udc_info->udc_command(S3C2410_UDC_P_ENABLE);
1635 }
1636
1637 /*
1638  *      usb_gadget_register_driver
1639  */
1640 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
1641 {
1642         struct s3c2410_udc *udc = the_controller;
1643         int             retval;
1644
1645         dprintk(DEBUG_NORMAL, "usb_gadget_register_driver() '%s'\n",
1646                 driver->driver.name);
1647
1648         /* Sanity checks */
1649         if (!udc)
1650                 return -ENODEV;
1651
1652         if (udc->driver)
1653                 return -EBUSY;
1654
1655         if (!driver->bind || !driver->setup
1656                         || driver->speed != USB_SPEED_FULL) {
1657                 printk(KERN_ERR "Invalid driver: bind %p setup %p speed %d\n",
1658                         driver->bind, driver->setup, driver->speed);
1659                 return -EINVAL;
1660         }
1661 #if defined(MODULE)
1662         if (!driver->unbind) {
1663                 printk(KERN_ERR "Invalid driver: no unbind method\n");
1664                 return -EINVAL;
1665         }
1666 #endif
1667
1668         /* Hook the driver */
1669         udc->driver = driver;
1670         udc->gadget.dev.driver = &driver->driver;
1671
1672         /* Bind the driver */
1673         if ((retval = device_add(&udc->gadget.dev)) != 0) {
1674                 printk(KERN_ERR "Error in device_add() : %d\n",retval);
1675                 goto register_error;
1676         }
1677
1678         dprintk(DEBUG_NORMAL, "binding gadget driver '%s'\n",
1679                 driver->driver.name);
1680
1681         if ((retval = driver->bind (&udc->gadget)) != 0) {
1682                 device_del(&udc->gadget.dev);
1683                 goto register_error;
1684         }
1685
1686         /* Enable udc */
1687         s3c2410_udc_enable(udc);
1688
1689         return 0;
1690
1691 register_error:
1692         udc->driver = NULL;
1693         udc->gadget.dev.driver = NULL;
1694         return retval;
1695 }
1696
1697 /*
1698  *      usb_gadget_unregister_driver
1699  */
1700 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1701 {
1702         struct s3c2410_udc *udc = the_controller;
1703
1704         if (!udc)
1705                 return -ENODEV;
1706
1707         if (!driver || driver != udc->driver || !driver->unbind)
1708                 return -EINVAL;
1709
1710         dprintk(DEBUG_NORMAL,"usb_gadget_register_driver() '%s'\n",
1711                 driver->driver.name);
1712
1713         if (driver->disconnect)
1714                 driver->disconnect(&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                         .bus_id         = "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         unsigned 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                 irq = s3c2410_gpio_getirq(udc_info->vbus_pin);
1878                 retval = request_irq(irq, s3c2410_udc_vbus_irq,
1879                                      IRQF_DISABLED | IRQF_TRIGGER_RISING
1880                                      | IRQF_TRIGGER_FALLING | IRQF_SHARED,
1881                                      gadget_name, udc);
1882
1883                 if (retval != 0) {
1884                         dev_err(dev, "can't get vbus irq %i, err %d\n",
1885                                 irq, retval);
1886                         retval = -EBUSY;
1887                         goto err_int;
1888                 }
1889
1890                 dev_dbg(dev, "got irq %i\n", irq);
1891         } else {
1892                 udc->vbus = 1;
1893         }
1894
1895         if (s3c2410_udc_debugfs_root) {
1896                 udc->regs_info = debugfs_create_file("registers", S_IRUGO,
1897                                 s3c2410_udc_debugfs_root,
1898                                 udc, &s3c2410_udc_debugfs_fops);
1899                 if (IS_ERR(udc->regs_info)) {
1900                         dev_warn(dev, "debugfs file creation failed %ld\n",
1901                                  PTR_ERR(udc->regs_info));
1902                         udc->regs_info = NULL;
1903                 }
1904         }
1905
1906         dev_dbg(dev, "probe ok\n");
1907
1908         return 0;
1909
1910 err_int:
1911         free_irq(IRQ_USBD, udc);
1912 err_map:
1913         iounmap(base_addr);
1914 err_mem:
1915         release_mem_region(rsrc_start, rsrc_len);
1916
1917         return retval;
1918 }
1919
1920 /*
1921  *      s3c2410_udc_remove
1922  */
1923 static int s3c2410_udc_remove(struct platform_device *pdev)
1924 {
1925         struct s3c2410_udc *udc = platform_get_drvdata(pdev);
1926         unsigned int irq;
1927
1928         dev_dbg(&pdev->dev, "%s()\n", __func__);
1929         if (udc->driver)
1930                 return -EBUSY;
1931
1932         debugfs_remove(udc->regs_info);
1933
1934         if (udc_info && udc_info->vbus_pin > 0) {
1935                 irq = s3c2410_gpio_getirq(udc_info->vbus_pin);
1936                 free_irq(irq, udc);
1937         }
1938
1939         free_irq(IRQ_USBD, udc);
1940
1941         iounmap(base_addr);
1942         release_mem_region(rsrc_start, rsrc_len);
1943
1944         platform_set_drvdata(pdev, NULL);
1945
1946         if (!IS_ERR(udc_clock) && udc_clock != NULL) {
1947                 clk_disable(udc_clock);
1948                 clk_put(udc_clock);
1949                 udc_clock = NULL;
1950         }
1951
1952         if (!IS_ERR(usb_bus_clock) && usb_bus_clock != NULL) {
1953                 clk_disable(usb_bus_clock);
1954                 clk_put(usb_bus_clock);
1955                 usb_bus_clock = NULL;
1956         }
1957
1958         dev_dbg(&pdev->dev, "%s: remove ok\n", __func__);
1959         return 0;
1960 }
1961
1962 #ifdef CONFIG_PM
1963 static int s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message)
1964 {
1965         if (udc_info && udc_info->udc_command)
1966                 udc_info->udc_command(S3C2410_UDC_P_DISABLE);
1967
1968         return 0;
1969 }
1970
1971 static int s3c2410_udc_resume(struct platform_device *pdev)
1972 {
1973         if (udc_info && udc_info->udc_command)
1974                 udc_info->udc_command(S3C2410_UDC_P_ENABLE);
1975
1976         return 0;
1977 }
1978 #else
1979 #define s3c2410_udc_suspend     NULL
1980 #define s3c2410_udc_resume      NULL
1981 #endif
1982
1983 static struct platform_driver udc_driver_2410 = {
1984         .driver         = {
1985                 .name   = "s3c2410-usbgadget",
1986                 .owner  = THIS_MODULE,
1987         },
1988         .probe          = s3c2410_udc_probe,
1989         .remove         = s3c2410_udc_remove,
1990         .suspend        = s3c2410_udc_suspend,
1991         .resume         = s3c2410_udc_resume,
1992 };
1993
1994 static struct platform_driver udc_driver_2440 = {
1995         .driver         = {
1996                 .name   = "s3c2440-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 int __init udc_init(void)
2006 {
2007         int retval;
2008
2009         dprintk(DEBUG_NORMAL, "%s: version %s\n", gadget_name, DRIVER_VERSION);
2010
2011         s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name, NULL);
2012         if (IS_ERR(s3c2410_udc_debugfs_root)) {
2013                 printk(KERN_ERR "%s: debugfs dir creation failed %ld\n",
2014                         gadget_name, PTR_ERR(s3c2410_udc_debugfs_root));
2015                 s3c2410_udc_debugfs_root = NULL;
2016         }
2017
2018         retval = platform_driver_register(&udc_driver_2410);
2019         if (retval)
2020                 goto err;
2021
2022         retval = platform_driver_register(&udc_driver_2440);
2023         if (retval)
2024                 goto err;
2025
2026         return 0;
2027
2028 err:
2029         debugfs_remove(s3c2410_udc_debugfs_root);
2030         return retval;
2031 }
2032
2033 static void __exit udc_exit(void)
2034 {
2035         platform_driver_unregister(&udc_driver_2410);
2036         platform_driver_unregister(&udc_driver_2440);
2037         debugfs_remove(s3c2410_udc_debugfs_root);
2038 }
2039
2040 EXPORT_SYMBOL(usb_gadget_unregister_driver);
2041 EXPORT_SYMBOL(usb_gadget_register_driver);
2042
2043 module_init(udc_init);
2044 module_exit(udc_exit);
2045
2046 MODULE_AUTHOR(DRIVER_AUTHOR);
2047 MODULE_DESCRIPTION(DRIVER_DESC);
2048 MODULE_VERSION(DRIVER_VERSION);
2049 MODULE_LICENSE("GPL");
2050 MODULE_ALIAS("platform:s3c2410-usbgadget");
2051 MODULE_ALIAS("platform:s3c2440-usbgadget");