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