2 * linux/drivers/usb/gadget/s3c2410_udc.c
4 * Samsung S3C24xx series on-chip full speed USB device controllers
6 * Copyright (C) 2004-2007 Herbert Pötzl - Arnaud Patard
7 * Additional cleanups by Ben Dooks <ben-linux@fluff.org>
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.
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>
31 #include <linux/debugfs.h>
32 #include <linux/seq_file.h>
34 #include <linux/usb.h>
35 #include <linux/usb/gadget.h>
37 #include <asm/byteorder.h>
40 #include <asm/unaligned.h>
41 #include <mach/irqs.h>
43 #include <mach/hardware.h>
45 #include <plat/regs-udc.h>
49 #include "s3c2410_udc.h"
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>"
56 static const char gadget_name[] = "s3c2410_udc";
57 static const char driver_desc[] = DRIVER_DESC;
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;
65 static struct dentry *s3c2410_udc_debugfs_root;
67 static inline u32 udc_read(u32 reg)
69 return readb(base_addr + reg);
72 static inline void udc_write(u32 value, u32 reg)
74 writeb(value, base_addr + reg);
77 static inline void udc_writeb(void __iomem *base, u32 value, u32 reg)
79 writeb(value, base + reg);
82 static struct s3c2410_udc_mach_info *udc_info;
84 /*************************** DEBUG FUNCTION ***************************/
85 #define DEBUG_NORMAL 1
86 #define DEBUG_VERBOSE 2
88 #ifdef CONFIG_USB_S3C2410_DEBUG
89 #define USB_S3C2410_DEBUG_LEVEL 0
91 static uint32_t s3c2410_ticks = 0;
93 static int dprintk(int level, const char *fmt, ...)
95 static char printk_buf[1024];
96 static long prevticks;
97 static int invocation;
101 if (level > USB_S3C2410_DEBUG_LEVEL)
104 if (s3c2410_ticks != prevticks) {
105 prevticks = s3c2410_ticks;
109 len = scnprintf(printk_buf,
110 sizeof(printk_buf), "%1lu.%02d USB: ",
111 prevticks, invocation++);
114 len = vscnprintf(printk_buf+len,
115 sizeof(printk_buf)-len, fmt, args);
118 return printk(KERN_DEBUG "%s", printk_buf);
121 static int dprintk(int level, const char *fmt, ...)
126 static int s3c2410_udc_debugfs_seq_show(struct seq_file *m, void *p)
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;
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);
152 seq_printf(m, "FUNC_ADDR_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"
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
176 static int s3c2410_udc_debugfs_fops_open(struct inode *inode,
179 return single_open(file, s3c2410_udc_debugfs_seq_show, NULL);
182 static const struct file_operations s3c2410_udc_debugfs_fops = {
183 .open = s3c2410_udc_debugfs_fops_open,
186 .release = single_release,
187 .owner = THIS_MODULE,
192 static inline void s3c2410_udc_clear_ep0_opr(void __iomem *base)
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);
199 static inline void s3c2410_udc_clear_ep0_sst(void __iomem *base)
201 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
202 writeb(0x00, base + S3C2410_UDC_EP0_CSR_REG);
205 static inline void s3c2410_udc_clear_ep0_se(void __iomem *base)
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);
211 static inline void s3c2410_udc_set_ep0_ipr(void __iomem *base)
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);
217 static inline void s3c2410_udc_set_ep0_de(void __iomem *base)
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);
223 inline void s3c2410_udc_set_ep0_ss(void __iomem *b)
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);
229 static inline void s3c2410_udc_set_ep0_de_out(void __iomem *base)
231 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
233 udc_writeb(base,(S3C2410_UDC_EP0_CSR_SOPKTRDY
234 | S3C2410_UDC_EP0_CSR_DE),
235 S3C2410_UDC_EP0_CSR_REG);
238 static inline void s3c2410_udc_set_ep0_sse_out(void __iomem *base)
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);
246 static inline void s3c2410_udc_set_ep0_de_in(void __iomem *base)
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);
254 /*------------------------- I/O ----------------------------------*/
259 static void s3c2410_udc_done(struct s3c2410_ep *ep,
260 struct s3c2410_request *req, int status)
262 unsigned halted = ep->halted;
264 list_del_init(&req->queue);
266 if (likely (req->req.status == -EINPROGRESS))
267 req->req.status = status;
269 status = req->req.status;
272 req->req.complete(&ep->ep, &req->req);
276 static void s3c2410_udc_nuke(struct s3c2410_udc *udc,
277 struct s3c2410_ep *ep, int status)
280 if (&ep->queue == NULL)
283 while (!list_empty (&ep->queue)) {
284 struct s3c2410_request *req;
285 req = list_entry (ep->queue.next, struct s3c2410_request,
287 s3c2410_udc_done(ep, req, status);
291 static inline void s3c2410_udc_clear_ep_state(struct s3c2410_udc *dev)
295 /* hardware SET_{CONFIGURATION,INTERFACE} automagic resets endpoint
296 * fifos, and pending transactions mustn't be continued in any case.
299 for (i = 1; i < S3C2410_ENDPOINTS; i++)
300 s3c2410_udc_nuke(dev, &dev->ep[i], -ECONNABORTED);
303 static inline int s3c2410_udc_fifo_count_out(void)
307 tmp = udc_read(S3C2410_UDC_OUT_FIFO_CNT2_REG) << 8;
308 tmp |= udc_read(S3C2410_UDC_OUT_FIFO_CNT1_REG);
313 * s3c2410_udc_write_packet
315 static inline int s3c2410_udc_write_packet(int fifo,
316 struct s3c2410_request *req,
319 unsigned len = min(req->req.length - req->req.actual, max);
320 u8 *buf = req->req.buf + req->req.actual;
324 dprintk(DEBUG_VERBOSE, "%s %d %d %d %d\n", __func__,
325 req->req.actual, req->req.length, len, req->req.actual + len);
327 req->req.actual += len;
330 writesb(base_addr + fifo, buf, len);
335 * s3c2410_udc_write_fifo
337 * return: 0 = still running, 1 = completed, negative = errno
339 static int s3c2410_udc_write_fifo(struct s3c2410_ep *ep,
340 struct s3c2410_request *req)
348 idx = ep->bEndpointAddress & 0x7F;
353 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
356 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
359 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
362 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
365 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
369 count = s3c2410_udc_write_packet(fifo_reg, req, ep->ep.maxpacket);
371 /* last packet is often short (sometimes a zlp) */
372 if (count != ep->ep.maxpacket)
374 else if (req->req.length != req->req.actual || req->req.zero)
379 /* Only ep0 debug messages are interesting */
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);
387 /* The order is important. It prevents sending 2 packets
388 * at the same time */
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;
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);
404 s3c2410_udc_done(ep, req, 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);
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);
424 static inline int s3c2410_udc_read_packet(int fifo, u8 *buf,
425 struct s3c2410_request *req, unsigned avail)
429 len = min(req->req.length - req->req.actual, avail);
430 req->req.actual += len;
432 readsb(fifo + base_addr, buf, len);
437 * return: 0 = still running, 1 = queue empty, negative = errno
439 static int s3c2410_udc_read_fifo(struct s3c2410_ep *ep,
440 struct s3c2410_request *req)
444 unsigned bufferspace;
451 idx = ep->bEndpointAddress & 0x7F;
457 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
460 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
463 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
466 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
469 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
473 if (!req->req.length)
476 buf = req->req.buf + req->req.actual;
477 bufferspace = req->req.length - req->req.actual;
479 dprintk(DEBUG_NORMAL, "%s: buffer full!\n", __func__);
483 udc_write(idx, S3C2410_UDC_INDEX_REG);
485 fifo_count = s3c2410_udc_fifo_count_out();
486 dprintk(DEBUG_NORMAL, "%s fifo count : %d\n", __func__, fifo_count);
488 if (fifo_count > ep->ep.maxpacket)
489 avail = ep->ep.maxpacket;
493 fifo_count = s3c2410_udc_read_packet(fifo_reg, buf, req, avail);
495 /* checking this with ep0 is not accurate as we already
496 * read a control request
498 if (idx != 0 && fifo_count < ep->ep.maxpacket) {
500 /* overflowed this request? flush extra data */
501 if (fifo_count != avail)
502 req->req.status = -EOVERFLOW;
504 is_last = (req->req.length <= req->req.actual) ? 1 : 0;
507 udc_write(idx, S3C2410_UDC_INDEX_REG);
508 fifo_count = s3c2410_udc_fifo_count_out();
510 /* Only ep0 debug messages are interesting */
512 dprintk(DEBUG_VERBOSE, "%s fifo count : %d [last %d]\n",
513 __func__, fifo_count,is_last);
517 s3c2410_udc_set_ep0_de_out(base_addr);
518 ep->dev->ep0state = EP0_IDLE;
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);
527 s3c2410_udc_done(ep, req, 0);
530 s3c2410_udc_clear_ep0_opr(base_addr);
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);
543 static int s3c2410_udc_read_fifo_crq(struct usb_ctrlrequest *crq)
545 unsigned char *outbuf = (unsigned char*)crq;
548 udc_write(0, S3C2410_UDC_INDEX_REG);
550 bytes_read = s3c2410_udc_fifo_count_out();
552 dprintk(DEBUG_NORMAL, "%s: fifo_count=%d\n", __func__, bytes_read);
554 if (bytes_read > sizeof(struct usb_ctrlrequest))
555 bytes_read = sizeof(struct usb_ctrlrequest);
557 readsb(S3C2410_UDC_EP0_FIFO_REG + base_addr, outbuf, bytes_read);
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);
566 static int s3c2410_udc_get_status(struct s3c2410_udc *dev,
567 struct usb_ctrlrequest *crq)
570 u8 ep_num = crq->wIndex & 0x7F;
571 u8 is_in = crq->wIndex & USB_DIR_IN;
573 switch (crq->bRequestType & USB_RECIP_MASK) {
574 case USB_RECIP_INTERFACE:
577 case USB_RECIP_DEVICE:
578 status = dev->devstatus;
581 case USB_RECIP_ENDPOINT:
582 if (ep_num > 4 || crq->wLength > 2)
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;
590 udc_write(ep_num, S3C2410_UDC_INDEX_REG);
592 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
593 status = status & S3C2410_UDC_ICSR1_SENDSTL;
595 status = udc_read(S3C2410_UDC_OUT_CSR1_REG);
596 status = status & S3C2410_UDC_OCSR1_SENDSTL;
600 status = status ? 1 : 0;
607 /* Seems to be needed to get it working. ouch :( */
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);
615 /*------------------------- usb state machine -------------------------------*/
616 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value);
618 static void s3c2410_udc_handle_ep0_idle(struct s3c2410_udc *dev,
619 struct s3c2410_ep *ep,
620 struct usb_ctrlrequest *crq,
625 /* start control request? */
626 if (!(ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY))
629 s3c2410_udc_nuke(dev, ep, -EPROTO);
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",
636 s3c2410_udc_set_ep0_ss(base_addr);
640 dprintk(DEBUG_NORMAL, "bRequest = %d bRequestType %d wLength = %d\n",
641 crq->bRequest, crq->bRequestType, crq->wLength);
643 /* cope with automagic for some standard requests. */
644 dev->req_std = (crq->bRequestType & USB_TYPE_MASK)
645 == USB_TYPE_STANDARD;
647 dev->req_pending = 1;
649 switch (crq->bRequest) {
650 case USB_REQ_SET_CONFIGURATION:
651 dprintk(DEBUG_NORMAL, "USB_REQ_SET_CONFIGURATION ... \n");
653 if (crq->bRequestType == USB_RECIP_DEVICE) {
655 s3c2410_udc_set_ep0_de_out(base_addr);
659 case USB_REQ_SET_INTERFACE:
660 dprintk(DEBUG_NORMAL, "USB_REQ_SET_INTERFACE ... \n");
662 if (crq->bRequestType == USB_RECIP_INTERFACE) {
664 s3c2410_udc_set_ep0_de_out(base_addr);
668 case USB_REQ_SET_ADDRESS:
669 dprintk(DEBUG_NORMAL, "USB_REQ_SET_ADDRESS ... \n");
671 if (crq->bRequestType == USB_RECIP_DEVICE) {
672 tmp = crq->wValue & 0x7F;
674 udc_write((tmp | S3C2410_UDC_FUNCADDR_UPDATE),
675 S3C2410_UDC_FUNC_ADDR_REG);
676 s3c2410_udc_set_ep0_de_out(base_addr);
681 case USB_REQ_GET_STATUS:
682 dprintk(DEBUG_NORMAL, "USB_REQ_GET_STATUS ... \n");
683 s3c2410_udc_clear_ep0_opr(base_addr);
686 if (!s3c2410_udc_get_status(dev, crq)) {
692 case USB_REQ_CLEAR_FEATURE:
693 s3c2410_udc_clear_ep0_opr(base_addr);
695 if (crq->bRequestType != USB_RECIP_ENDPOINT)
698 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
701 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 0);
702 s3c2410_udc_set_ep0_de_out(base_addr);
705 case USB_REQ_SET_FEATURE:
706 s3c2410_udc_clear_ep0_opr(base_addr);
708 if (crq->bRequestType != USB_RECIP_ENDPOINT)
711 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
714 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 1);
715 s3c2410_udc_set_ep0_de_out(base_addr);
719 s3c2410_udc_clear_ep0_opr(base_addr);
723 if (crq->bRequestType & USB_DIR_IN)
724 dev->ep0state = EP0_IN_DATA_PHASE;
726 dev->ep0state = EP0_OUT_DATA_PHASE;
731 /* deliver the request to the gadget driver */
732 ret = dev->driver->setup(&dev->gadget, crq);
734 if (dev->req_config) {
735 dprintk(DEBUG_NORMAL, "config change %02x fail %d?\n",
740 if (ret == -EOPNOTSUPP)
741 dprintk(DEBUG_NORMAL, "Operation not supported\n");
743 dprintk(DEBUG_NORMAL,
744 "dev->driver->setup failed. (%d)\n", ret);
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");
756 dprintk(DEBUG_VERBOSE, "ep0state %s\n", ep0states[dev->ep0state]);
759 static void s3c2410_udc_handle_ep0(struct s3c2410_udc *dev)
762 struct s3c2410_ep *ep = &dev->ep[0];
763 struct s3c2410_request *req;
764 struct usb_ctrlrequest crq;
766 if (list_empty(&ep->queue))
769 req = list_entry(ep->queue.next, struct s3c2410_request, queue);
771 /* We make the assumption that S3C2410_UDC_IN_CSR1_REG equal to
772 * S3C2410_UDC_EP0_CSR_REG when index is zero */
774 udc_write(0, S3C2410_UDC_INDEX_REG);
775 ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
777 dprintk(DEBUG_NORMAL, "ep0csr %x ep0state %s\n",
778 ep0csr, ep0states[dev->ep0state]);
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;
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;
797 switch (dev->ep0state) {
799 s3c2410_udc_handle_ep0_idle(dev, ep, &crq, ep0csr);
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);
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);
817 dprintk(DEBUG_NORMAL, "EP0_END_XFER ... what now?\n");
818 dev->ep0state = EP0_IDLE;
822 dprintk(DEBUG_NORMAL, "EP0_STALL ... what now?\n");
823 dev->ep0state = EP0_IDLE;
829 * handle_ep - Manage I/O endpoints
832 static void s3c2410_udc_handle_ep(struct s3c2410_ep *ep)
834 struct s3c2410_request *req;
835 int is_in = ep->bEndpointAddress & USB_DIR_IN;
839 if (likely (!list_empty(&ep->queue)))
840 req = list_entry(ep->queue.next,
841 struct s3c2410_request, queue);
845 idx = ep->bEndpointAddress & 0x7F;
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);
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);
861 if (!(ep_csr1 & S3C2410_UDC_ICSR1_PKTRDY) && req) {
862 s3c2410_udc_write_fifo(ep,req);
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);
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);
876 if ((ep_csr1 & S3C2410_UDC_OCSR1_PKTRDY) && req) {
877 s3c2410_udc_read_fifo(ep,req);
882 #include <mach/regs-irq.h>
885 * s3c2410_udc_irq - interrupt handler
887 static irqreturn_t s3c2410_udc_irq(int dummy, void *_dev)
889 struct s3c2410_udc *dev = _dev;
898 spin_lock_irqsave(&dev->lock, flags);
900 /* Driver connected ? */
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);
910 idx = udc_read(S3C2410_UDC_INDEX_REG);
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);
917 udc_writeb(base_addr, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
918 ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
920 dprintk(DEBUG_NORMAL, "usbs=%02x, usbds=%02x, pwr=%02x ep0csr=%02x\n",
921 usb_status, usbd_status, pwr_reg, ep0csr);
924 * Now, handle interrupts. There's two types :
925 * - Reset, Resume, Suspend coming -> usb_int_reg
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
935 dprintk(DEBUG_NORMAL, "USB reset csr %x pwr %x\n",
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);
944 dev->ep0state = EP0_IDLE;
945 dev->gadget.speed = USB_SPEED_FULL;
947 /* clear interrupt */
948 udc_write(S3C2410_UDC_USBINT_RESET,
949 S3C2410_UDC_USB_INT_REG);
951 udc_write(idx, S3C2410_UDC_INDEX_REG);
952 spin_unlock_irqrestore(&dev->lock, flags);
957 if (usb_status & S3C2410_UDC_USBINT_RESUME) {
958 dprintk(DEBUG_NORMAL, "USB resume\n");
960 /* clear interrupt */
961 udc_write(S3C2410_UDC_USBINT_RESUME,
962 S3C2410_UDC_USB_INT_REG);
964 if (dev->gadget.speed != USB_SPEED_UNKNOWN
966 && dev->driver->resume)
967 dev->driver->resume(&dev->gadget);
971 if (usb_status & S3C2410_UDC_USBINT_SUSPEND) {
972 dprintk(DEBUG_NORMAL, "USB suspend\n");
974 /* clear interrupt */
975 udc_write(S3C2410_UDC_USBINT_SUSPEND,
976 S3C2410_UDC_USB_INT_REG);
978 if (dev->gadget.speed != USB_SPEED_UNKNOWN
980 && dev->driver->suspend)
981 dev->driver->suspend(&dev->gadget);
983 dev->ep0state = EP0_IDLE;
987 /* control traffic */
988 /* check on ep0csr != 0 is not a good idea as clearing in_pkt_ready
989 * generate an interrupt
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);
998 /* endpoint data transfers */
999 for (i = 1; i < S3C2410_ENDPOINTS; i++) {
1001 if (usbd_status & tmp) {
1002 dprintk(DEBUG_VERBOSE, "USB ep%d irq\n", i);
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]);
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);
1016 if (udc_read(S3C2410_UDC_OUT_CSR1_REG) & 0x1)
1017 s3c2410_udc_handle_ep(&dev->ep[i]);
1020 udc_write(idx2, S3C2410_UDC_INDEX_REG);
1024 dprintk(DEBUG_VERBOSE, "irq: %d s3c2410_udc_done.\n", IRQ_USBD);
1026 /* Restore old index */
1027 udc_write(idx, S3C2410_UDC_INDEX_REG);
1029 spin_unlock_irqrestore(&dev->lock, flags);
1033 /*------------------------- s3c2410_ep_ops ----------------------------------*/
1035 static inline struct s3c2410_ep *to_s3c2410_ep(struct usb_ep *ep)
1037 return container_of(ep, struct s3c2410_ep, ep);
1040 static inline struct s3c2410_udc *to_s3c2410_udc(struct usb_gadget *gadget)
1042 return container_of(gadget, struct s3c2410_udc, gadget);
1045 static inline struct s3c2410_request *to_s3c2410_req(struct usb_request *req)
1047 return container_of(req, struct s3c2410_request, req);
1051 * s3c2410_udc_ep_enable
1053 static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
1054 const struct usb_endpoint_descriptor *desc)
1056 struct s3c2410_udc *dev;
1057 struct s3c2410_ep *ep;
1059 unsigned long flags;
1063 ep = to_s3c2410_ep(_ep);
1065 if (!_ep || !desc || ep->desc
1066 || _ep->name == ep0name
1067 || desc->bDescriptorType != USB_DT_ENDPOINT)
1071 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
1074 max = usb_endpoint_maxp(desc) & 0x1fff;
1076 local_irq_save (flags);
1077 _ep->maxpacket = max & 0x7ff;
1080 ep->bEndpointAddress = desc->bEndpointAddress;
1082 /* set max packet */
1083 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1084 udc_write(max >> 3, S3C2410_UDC_MAXP_REG);
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;
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);
1096 /* don't flush in fifo or it will cause endpoint interrupt */
1097 csr1 = S3C2410_UDC_ICSR1_CLRDT;
1098 csr2 = S3C2410_UDC_ICSR2_DMAIEN;
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);
1105 csr1 = S3C2410_UDC_OCSR1_FFLUSH | S3C2410_UDC_OCSR1_CLRDT;
1106 csr2 = S3C2410_UDC_OCSR2_DMAIEN;
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);
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);
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);
1124 local_irq_restore (flags);
1125 s3c2410_udc_set_halt(_ep, 0);
1131 * s3c2410_udc_ep_disable
1133 static int s3c2410_udc_ep_disable(struct usb_ep *_ep)
1135 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1136 unsigned long flags;
1139 if (!_ep || !ep->desc) {
1140 dprintk(DEBUG_NORMAL, "%s not enabled\n",
1141 _ep ? ep->ep.name : NULL);
1145 local_irq_save(flags);
1147 dprintk(DEBUG_NORMAL, "ep_disable: %s\n", _ep->name);
1153 s3c2410_udc_nuke (ep->dev, ep, -ESHUTDOWN);
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);
1159 local_irq_restore(flags);
1161 dprintk(DEBUG_NORMAL, "%s disabled\n", _ep->name);
1167 * s3c2410_udc_alloc_request
1169 static struct usb_request *
1170 s3c2410_udc_alloc_request(struct usb_ep *_ep, gfp_t mem_flags)
1172 struct s3c2410_request *req;
1174 dprintk(DEBUG_VERBOSE,"%s(%p,%d)\n", __func__, _ep, mem_flags);
1179 req = kzalloc (sizeof(struct s3c2410_request), mem_flags);
1183 INIT_LIST_HEAD (&req->queue);
1188 * s3c2410_udc_free_request
1191 s3c2410_udc_free_request(struct usb_ep *_ep, struct usb_request *_req)
1193 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1194 struct s3c2410_request *req = to_s3c2410_req(_req);
1196 dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1198 if (!ep || !_req || (!ep->desc && _ep->name != ep0name))
1201 WARN_ON (!list_empty (&req->queue));
1208 static int s3c2410_udc_queue(struct usb_ep *_ep, struct usb_request *_req,
1211 struct s3c2410_request *req = to_s3c2410_req(_req);
1212 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1213 struct s3c2410_udc *dev;
1216 unsigned long flags;
1218 if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1219 dprintk(DEBUG_NORMAL, "%s: invalid args\n", __func__);
1224 if (unlikely (!dev->driver
1225 || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
1229 local_irq_save (flags);
1231 if (unlikely(!_req || !_req->complete
1232 || !_req->buf || !list_empty(&req->queue))) {
1234 dprintk(DEBUG_NORMAL, "%s: 1 X X X\n", __func__);
1236 dprintk(DEBUG_NORMAL, "%s: 0 %01d %01d %01d\n",
1237 __func__, !_req->complete,!_req->buf,
1238 !list_empty(&req->queue));
1241 local_irq_restore(flags);
1245 _req->status = -EINPROGRESS;
1248 dprintk(DEBUG_VERBOSE, "%s: ep%x len %d\n",
1249 __func__, ep->bEndpointAddress, _req->length);
1251 if (ep->bEndpointAddress) {
1252 udc_write(ep->bEndpointAddress & 0x7F, S3C2410_UDC_INDEX_REG);
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();
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();
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,
1272 dev->ep0state = EP0_IDLE;
1277 case EP0_OUT_DATA_PHASE:
1279 || ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1280 && s3c2410_udc_read_fifo(ep,
1282 dev->ep0state = EP0_IDLE;
1288 local_irq_restore(flags);
1291 } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0
1292 && (!(ep_csr&S3C2410_UDC_OCSR1_PKTRDY))
1293 && s3c2410_udc_write_fifo(ep, req)) {
1295 } else if ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1297 && s3c2410_udc_read_fifo(ep, req)) {
1302 /* pio or dma irq handler advances the queue. */
1303 if (likely (req != 0))
1304 list_add_tail(&req->queue, &ep->queue);
1306 local_irq_restore(flags);
1308 dprintk(DEBUG_VERBOSE, "%s ok\n", __func__);
1313 * s3c2410_udc_dequeue
1315 static int s3c2410_udc_dequeue(struct usb_ep *_ep, struct usb_request *_req)
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;
1323 dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1325 if (!the_controller->driver)
1331 udc = to_s3c2410_udc(ep->gadget);
1333 local_irq_save (flags);
1335 list_for_each_entry (req, &ep->queue, queue) {
1336 if (&req->req == _req) {
1337 list_del_init (&req->queue);
1338 _req->status = -ECONNRESET;
1345 dprintk(DEBUG_VERBOSE,
1346 "dequeued req %p from %s, len %d buf %p\n",
1347 req, _ep->name, _req->length, _req->buf);
1349 s3c2410_udc_done(ep, req, -ECONNRESET);
1352 local_irq_restore (flags);
1357 * s3c2410_udc_set_halt
1359 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value)
1361 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1363 unsigned long flags;
1366 if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1367 dprintk(DEBUG_NORMAL, "%s: inval 2\n", __func__);
1371 local_irq_save (flags);
1373 idx = ep->bEndpointAddress & 0x7F;
1376 s3c2410_udc_set_ep0_ss(base_addr);
1377 s3c2410_udc_set_ep0_de_out(base_addr);
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);
1384 if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
1386 udc_write(ep_csr | S3C2410_UDC_ICSR1_SENDSTL,
1387 S3C2410_UDC_IN_CSR1_REG);
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);
1396 udc_write(ep_csr | S3C2410_UDC_OCSR1_SENDSTL,
1397 S3C2410_UDC_OUT_CSR1_REG);
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);
1407 ep->halted = value ? 1 : 0;
1408 local_irq_restore (flags);
1413 static const struct usb_ep_ops s3c2410_ep_ops = {
1414 .enable = s3c2410_udc_ep_enable,
1415 .disable = s3c2410_udc_ep_disable,
1417 .alloc_request = s3c2410_udc_alloc_request,
1418 .free_request = s3c2410_udc_free_request,
1420 .queue = s3c2410_udc_queue,
1421 .dequeue = s3c2410_udc_dequeue,
1423 .set_halt = s3c2410_udc_set_halt,
1426 /*------------------------- usb_gadget_ops ----------------------------------*/
1429 * s3c2410_udc_get_frame
1431 static int s3c2410_udc_get_frame(struct usb_gadget *_gadget)
1435 dprintk(DEBUG_VERBOSE, "%s()\n", __func__);
1437 tmp = udc_read(S3C2410_UDC_FRAME_NUM2_REG) << 8;
1438 tmp |= udc_read(S3C2410_UDC_FRAME_NUM1_REG);
1443 * s3c2410_udc_wakeup
1445 static int s3c2410_udc_wakeup(struct usb_gadget *_gadget)
1447 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1452 * s3c2410_udc_set_selfpowered
1454 static int s3c2410_udc_set_selfpowered(struct usb_gadget *gadget, int value)
1456 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1458 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1461 udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
1463 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
1468 static void s3c2410_udc_disable(struct s3c2410_udc *dev);
1469 static void s3c2410_udc_enable(struct s3c2410_udc *dev);
1471 static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on)
1473 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1475 if (udc_info && (udc_info->udc_command ||
1476 gpio_is_valid(udc_info->pullup_pin))) {
1479 s3c2410_udc_enable(udc);
1481 if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
1482 if (udc->driver && udc->driver->disconnect)
1483 udc->driver->disconnect(&udc->gadget);
1486 s3c2410_udc_disable(udc);
1495 static int s3c2410_udc_vbus_session(struct usb_gadget *gadget, int is_active)
1497 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1499 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1501 udc->vbus = (is_active != 0);
1502 s3c2410_udc_set_pullup(udc, is_active);
1506 static int s3c2410_udc_pullup(struct usb_gadget *gadget, int is_on)
1508 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1510 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1512 s3c2410_udc_set_pullup(udc, is_on ? 0 : 1);
1516 static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev)
1518 struct s3c2410_udc *dev = _dev;
1521 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1523 value = gpio_get_value(udc_info->vbus_pin) ? 1 : 0;
1524 if (udc_info->vbus_pin_inverted)
1527 if (value != dev->vbus)
1528 s3c2410_udc_vbus_session(&dev->gadget, value);
1533 static int s3c2410_vbus_draw(struct usb_gadget *_gadget, unsigned ma)
1535 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1537 if (udc_info && udc_info->vbus_draw) {
1538 udc_info->vbus_draw(ma);
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);
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,
1560 static void s3c2410_udc_command(enum s3c2410_udc_cmd_e cmd)
1565 if (udc_info->udc_command) {
1566 udc_info->udc_command(cmd);
1567 } else if (gpio_is_valid(udc_info->pullup_pin)) {
1571 case S3C2410_UDC_P_ENABLE:
1574 case S3C2410_UDC_P_DISABLE:
1580 value ^= udc_info->pullup_pin_inverted;
1582 gpio_set_value(udc_info->pullup_pin, value);
1586 /*------------------------- gadget driver handling---------------------------*/
1588 * s3c2410_udc_disable
1590 static void s3c2410_udc_disable(struct s3c2410_udc *dev)
1592 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1594 /* Disable all interrupts */
1595 udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG);
1596 udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG);
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);
1604 udc_write(0x1F, S3C2410_UDC_EP_INT_REG);
1606 /* Good bye, cruel world */
1607 s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
1609 /* Set speed to unknown */
1610 dev->gadget.speed = USB_SPEED_UNKNOWN;
1614 * s3c2410_udc_reinit
1616 static void s3c2410_udc_reinit(struct s3c2410_udc *dev)
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;
1625 for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1626 struct s3c2410_ep *ep = &dev->ep[i];
1629 list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
1635 INIT_LIST_HEAD (&ep->queue);
1640 * s3c2410_udc_enable
1642 static void s3c2410_udc_enable(struct s3c2410_udc *dev)
1646 dprintk(DEBUG_NORMAL, "s3c2410_udc_enable called\n");
1648 /* dev->gadget.speed = USB_SPEED_UNKNOWN; */
1649 dev->gadget.speed = USB_SPEED_FULL;
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);
1658 /* Set default power state */
1659 udc_write(DEFAULT_POWER_STATE, S3C2410_UDC_PWR_REG);
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);
1665 /* Enable ep0 interrupt */
1666 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG);
1668 /* time to say "hello, world" */
1669 s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
1672 static int s3c2410_udc_start(struct usb_gadget_driver *driver,
1673 int (*bind)(struct usb_gadget *))
1675 struct s3c2410_udc *udc = the_controller;
1678 dprintk(DEBUG_NORMAL, "%s() '%s'\n", __func__, driver->driver.name);
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);
1693 if (!driver->unbind) {
1694 printk(KERN_ERR "Invalid driver: no unbind method\n");
1699 /* Hook the driver */
1700 udc->driver = driver;
1701 udc->gadget.dev.driver = &driver->driver;
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;
1709 dprintk(DEBUG_NORMAL, "binding gadget driver '%s'\n",
1710 driver->driver.name);
1712 if ((retval = bind(&udc->gadget)) != 0) {
1713 device_del(&udc->gadget.dev);
1714 goto register_error;
1718 s3c2410_udc_enable(udc);
1724 udc->gadget.dev.driver = NULL;
1728 static int s3c2410_udc_stop(struct usb_gadget_driver *driver)
1730 struct s3c2410_udc *udc = the_controller;
1735 if (!driver || driver != udc->driver || !driver->unbind)
1738 dprintk(DEBUG_NORMAL, "usb_gadget_unregister_driver() '%s'\n",
1739 driver->driver.name);
1741 /* report disconnect */
1742 if (driver->disconnect)
1743 driver->disconnect(&udc->gadget);
1745 driver->unbind(&udc->gadget);
1747 device_del(&udc->gadget.dev);
1751 s3c2410_udc_disable(udc);
1756 /*---------------------------------------------------------------------------*/
1757 static struct s3c2410_udc memory = {
1759 .ops = &s3c2410_ops,
1760 .ep0 = &memory.ep[0].ep,
1761 .name = gadget_name,
1763 .init_name = "gadget",
1767 /* control endpoint */
1772 .ops = &s3c2410_ep_ops,
1773 .maxpacket = EP0_FIFO_SIZE,
1778 /* first group of endpoints */
1783 .ops = &s3c2410_ep_ops,
1784 .maxpacket = EP_FIFO_SIZE,
1787 .fifo_size = EP_FIFO_SIZE,
1788 .bEndpointAddress = 1,
1789 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1795 .ops = &s3c2410_ep_ops,
1796 .maxpacket = EP_FIFO_SIZE,
1799 .fifo_size = EP_FIFO_SIZE,
1800 .bEndpointAddress = 2,
1801 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1807 .ops = &s3c2410_ep_ops,
1808 .maxpacket = EP_FIFO_SIZE,
1811 .fifo_size = EP_FIFO_SIZE,
1812 .bEndpointAddress = 3,
1813 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1819 .ops = &s3c2410_ep_ops,
1820 .maxpacket = EP_FIFO_SIZE,
1823 .fifo_size = EP_FIFO_SIZE,
1824 .bEndpointAddress = 4,
1825 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1831 * probe - binds to the platform device
1833 static int s3c2410_udc_probe(struct platform_device *pdev)
1835 struct s3c2410_udc *udc = &memory;
1836 struct device *dev = &pdev->dev;
1840 dev_dbg(dev, "%s()\n", __func__);
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);
1848 clk_enable(usb_bus_clock);
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);
1856 clk_enable(udc_clock);
1860 dev_dbg(dev, "got and enabled clocks\n");
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;
1870 spin_lock_init (&udc->lock);
1871 udc_info = pdev->dev.platform_data;
1873 rsrc_start = S3C2410_PA_USBDEV;
1874 rsrc_len = S3C24XX_SZ_USBDEV;
1876 if (!request_mem_region(rsrc_start, rsrc_len, gadget_name))
1879 base_addr = ioremap(rsrc_start, rsrc_len);
1885 device_initialize(&udc->gadget.dev);
1886 udc->gadget.dev.parent = &pdev->dev;
1887 udc->gadget.dev.dma_mask = pdev->dev.dma_mask;
1889 the_controller = udc;
1890 platform_set_drvdata(pdev, udc);
1892 s3c2410_udc_disable(udc);
1893 s3c2410_udc_reinit(udc);
1895 /* irq setup after old hardware state is cleaned up */
1896 retval = request_irq(IRQ_USBD, s3c2410_udc_irq,
1897 0, gadget_name, udc);
1900 dev_err(dev, "cannot get irq %i, err %d\n", IRQ_USBD, retval);
1905 dev_dbg(dev, "got irq %i\n", IRQ_USBD);
1907 if (udc_info && udc_info->vbus_pin > 0) {
1908 retval = gpio_request(udc_info->vbus_pin, "udc vbus");
1910 dev_err(dev, "cannot claim vbus pin\n");
1914 irq = gpio_to_irq(udc_info->vbus_pin);
1916 dev_err(dev, "no irq for gpio vbus pin\n");
1917 goto err_gpio_claim;
1920 retval = request_irq(irq, s3c2410_udc_vbus_irq,
1922 | IRQF_TRIGGER_FALLING | IRQF_SHARED,
1926 dev_err(dev, "can't get vbus irq %d, err %d\n",
1929 goto err_gpio_claim;
1932 dev_dbg(dev, "got irq %i\n", irq);
1937 if (udc_info && !udc_info->udc_command &&
1938 gpio_is_valid(udc_info->pullup_pin)) {
1940 retval = gpio_request_one(udc_info->pullup_pin,
1941 udc_info->vbus_pin_inverted ?
1942 GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
1948 retval = usb_add_gadget_udc(&pdev->dev, &udc->gadget);
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");
1960 dev_dbg(dev, "probe ok\n");
1965 if (udc_info && !udc_info->udc_command &&
1966 gpio_is_valid(udc_info->pullup_pin))
1967 gpio_free(udc_info->pullup_pin);
1969 if (udc_info && udc_info->vbus_pin > 0)
1970 free_irq(gpio_to_irq(udc_info->vbus_pin), udc);
1972 if (udc_info && udc_info->vbus_pin > 0)
1973 gpio_free(udc_info->vbus_pin);
1975 free_irq(IRQ_USBD, udc);
1979 release_mem_region(rsrc_start, rsrc_len);
1985 * s3c2410_udc_remove
1987 static int s3c2410_udc_remove(struct platform_device *pdev)
1989 struct s3c2410_udc *udc = platform_get_drvdata(pdev);
1992 dev_dbg(&pdev->dev, "%s()\n", __func__);
1994 usb_del_gadget_udc(&udc->gadget);
1998 debugfs_remove(udc->regs_info);
2000 if (udc_info && !udc_info->udc_command &&
2001 gpio_is_valid(udc_info->pullup_pin))
2002 gpio_free(udc_info->pullup_pin);
2004 if (udc_info && udc_info->vbus_pin > 0) {
2005 irq = gpio_to_irq(udc_info->vbus_pin);
2009 free_irq(IRQ_USBD, udc);
2012 release_mem_region(rsrc_start, rsrc_len);
2014 platform_set_drvdata(pdev, NULL);
2016 if (!IS_ERR(udc_clock) && udc_clock != NULL) {
2017 clk_disable(udc_clock);
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;
2028 dev_dbg(&pdev->dev, "%s: remove ok\n", __func__);
2033 static int s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message)
2035 s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
2040 static int s3c2410_udc_resume(struct platform_device *pdev)
2042 s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
2047 #define s3c2410_udc_suspend NULL
2048 #define s3c2410_udc_resume NULL
2051 static const struct platform_device_id s3c_udc_ids[] = {
2052 { "s3c2410-usbgadget", },
2053 { "s3c2440-usbgadget", },
2056 MODULE_DEVICE_TABLE(platform, s3c_udc_ids);
2058 static struct platform_driver udc_driver_24x0 = {
2060 .name = "s3c24x0-usbgadget",
2061 .owner = THIS_MODULE,
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,
2070 static int __init udc_init(void)
2074 dprintk(DEBUG_NORMAL, "%s: version %s\n", gadget_name, DRIVER_VERSION);
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;
2083 retval = platform_driver_register(&udc_driver_24x0);
2090 debugfs_remove(s3c2410_udc_debugfs_root);
2094 static void __exit udc_exit(void)
2096 platform_driver_unregister(&udc_driver_24x0);
2097 debugfs_remove(s3c2410_udc_debugfs_root);
2100 module_init(udc_init);
2101 module_exit(udc_exit);
2103 MODULE_AUTHOR(DRIVER_AUTHOR);
2104 MODULE_DESCRIPTION(DRIVER_DESC);
2105 MODULE_VERSION(DRIVER_VERSION);
2106 MODULE_LICENSE("GPL");