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 #define pr_fmt(fmt) "s3c2410_udc: " fmt
17 #include <linux/module.h>
18 #include <linux/kernel.h>
19 #include <linux/delay.h>
20 #include <linux/ioport.h>
21 #include <linux/sched.h>
22 #include <linux/slab.h>
23 #include <linux/errno.h>
24 #include <linux/init.h>
25 #include <linux/timer.h>
26 #include <linux/list.h>
27 #include <linux/interrupt.h>
28 #include <linux/platform_device.h>
29 #include <linux/clk.h>
30 #include <linux/gpio.h>
31 #include <linux/prefetch.h>
34 #include <linux/debugfs.h>
35 #include <linux/seq_file.h>
37 #include <linux/usb.h>
38 #include <linux/usb/gadget.h>
40 #include <asm/byteorder.h>
42 #include <asm/unaligned.h>
43 #include <mach/irqs.h>
45 #include <mach/hardware.h>
47 #include <plat/regs-udc.h>
48 #include <linux/platform_data/usb-s3c2410_udc.h>
51 #include "s3c2410_udc.h"
53 #define DRIVER_DESC "S3C2410 USB Device Controller Gadget"
54 #define DRIVER_AUTHOR "Herbert Pötzl <herbert@13thfloor.at>, " \
55 "Arnaud Patard <arnaud.patard@rtp-net.org>"
57 static const char gadget_name[] = "s3c2410_udc";
58 static const char driver_desc[] = DRIVER_DESC;
60 static struct s3c2410_udc *the_controller;
61 static struct clk *udc_clock;
62 static struct clk *usb_bus_clock;
63 static void __iomem *base_addr;
64 static u64 rsrc_start;
66 static struct dentry *s3c2410_udc_debugfs_root;
68 static inline u32 udc_read(u32 reg)
70 return readb(base_addr + reg);
73 static inline void udc_write(u32 value, u32 reg)
75 writeb(value, base_addr + reg);
78 static inline void udc_writeb(void __iomem *base, u32 value, u32 reg)
80 writeb(value, base + reg);
83 static struct s3c2410_udc_mach_info *udc_info;
85 /*************************** DEBUG FUNCTION ***************************/
86 #define DEBUG_NORMAL 1
87 #define DEBUG_VERBOSE 2
89 #ifdef CONFIG_USB_S3C2410_DEBUG
90 #define USB_S3C2410_DEBUG_LEVEL 0
92 static uint32_t s3c2410_ticks = 0;
95 static void dprintk(int level, const char *fmt, ...)
97 static long prevticks;
98 static int invocation;
102 if (level > USB_S3C2410_DEBUG_LEVEL)
110 if (s3c2410_ticks != prevticks) {
111 prevticks = s3c2410_ticks;
115 pr_debug("%1lu.%02d USB: %pV", prevticks, invocation++, &vaf);
121 static void 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_de_in(void __iomem *base)
240 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
241 udc_writeb(base, (S3C2410_UDC_EP0_CSR_IPKRDY
242 | S3C2410_UDC_EP0_CSR_DE),
243 S3C2410_UDC_EP0_CSR_REG);
246 /*------------------------- I/O ----------------------------------*/
251 static void s3c2410_udc_done(struct s3c2410_ep *ep,
252 struct s3c2410_request *req, int status)
254 unsigned halted = ep->halted;
256 list_del_init(&req->queue);
258 if (likely(req->req.status == -EINPROGRESS))
259 req->req.status = status;
261 status = req->req.status;
264 usb_gadget_giveback_request(&ep->ep, &req->req);
268 static void s3c2410_udc_nuke(struct s3c2410_udc *udc,
269 struct s3c2410_ep *ep, int status)
271 while (!list_empty(&ep->queue)) {
272 struct s3c2410_request *req;
273 req = list_entry(ep->queue.next, struct s3c2410_request,
275 s3c2410_udc_done(ep, req, status);
279 static inline int s3c2410_udc_fifo_count_out(void)
283 tmp = udc_read(S3C2410_UDC_OUT_FIFO_CNT2_REG) << 8;
284 tmp |= udc_read(S3C2410_UDC_OUT_FIFO_CNT1_REG);
289 * s3c2410_udc_write_packet
291 static inline int s3c2410_udc_write_packet(int fifo,
292 struct s3c2410_request *req,
295 unsigned len = min(req->req.length - req->req.actual, max);
296 u8 *buf = req->req.buf + req->req.actual;
300 dprintk(DEBUG_VERBOSE, "%s %d %d %d %d\n", __func__,
301 req->req.actual, req->req.length, len, req->req.actual + len);
303 req->req.actual += len;
306 writesb(base_addr + fifo, buf, len);
311 * s3c2410_udc_write_fifo
313 * return: 0 = still running, 1 = completed, negative = errno
315 static int s3c2410_udc_write_fifo(struct s3c2410_ep *ep,
316 struct s3c2410_request *req)
324 idx = ep->bEndpointAddress & 0x7F;
329 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
332 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
335 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
338 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
341 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
345 count = s3c2410_udc_write_packet(fifo_reg, req, ep->ep.maxpacket);
347 /* last packet is often short (sometimes a zlp) */
348 if (count != ep->ep.maxpacket)
350 else if (req->req.length != req->req.actual || req->req.zero)
355 /* Only ep0 debug messages are interesting */
357 dprintk(DEBUG_NORMAL,
358 "Written ep%d %d.%d of %d b [last %d,z %d]\n",
359 idx, count, req->req.actual, req->req.length,
360 is_last, req->req.zero);
363 /* The order is important. It prevents sending 2 packets
364 * at the same time */
367 /* Reset signal => no need to say 'data sent' */
368 if (!(udc_read(S3C2410_UDC_USB_INT_REG)
369 & S3C2410_UDC_USBINT_RESET))
370 s3c2410_udc_set_ep0_de_in(base_addr);
371 ep->dev->ep0state = EP0_IDLE;
373 udc_write(idx, S3C2410_UDC_INDEX_REG);
374 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
375 udc_write(idx, S3C2410_UDC_INDEX_REG);
376 udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
377 S3C2410_UDC_IN_CSR1_REG);
380 s3c2410_udc_done(ep, req, 0);
384 /* Reset signal => no need to say 'data sent' */
385 if (!(udc_read(S3C2410_UDC_USB_INT_REG)
386 & S3C2410_UDC_USBINT_RESET))
387 s3c2410_udc_set_ep0_ipr(base_addr);
389 udc_write(idx, S3C2410_UDC_INDEX_REG);
390 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
391 udc_write(idx, S3C2410_UDC_INDEX_REG);
392 udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
393 S3C2410_UDC_IN_CSR1_REG);
400 static inline int s3c2410_udc_read_packet(int fifo, u8 *buf,
401 struct s3c2410_request *req, unsigned avail)
405 len = min(req->req.length - req->req.actual, avail);
406 req->req.actual += len;
408 readsb(fifo + base_addr, buf, len);
413 * return: 0 = still running, 1 = queue empty, negative = errno
415 static int s3c2410_udc_read_fifo(struct s3c2410_ep *ep,
416 struct s3c2410_request *req)
420 unsigned bufferspace;
427 idx = ep->bEndpointAddress & 0x7F;
433 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
436 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
439 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
442 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
445 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
449 if (!req->req.length)
452 buf = req->req.buf + req->req.actual;
453 bufferspace = req->req.length - req->req.actual;
455 dprintk(DEBUG_NORMAL, "%s: buffer full!\n", __func__);
459 udc_write(idx, S3C2410_UDC_INDEX_REG);
461 fifo_count = s3c2410_udc_fifo_count_out();
462 dprintk(DEBUG_NORMAL, "%s fifo count : %d\n", __func__, fifo_count);
464 if (fifo_count > ep->ep.maxpacket)
465 avail = ep->ep.maxpacket;
469 fifo_count = s3c2410_udc_read_packet(fifo_reg, buf, req, avail);
471 /* checking this with ep0 is not accurate as we already
472 * read a control request
474 if (idx != 0 && fifo_count < ep->ep.maxpacket) {
476 /* overflowed this request? flush extra data */
477 if (fifo_count != avail)
478 req->req.status = -EOVERFLOW;
480 is_last = (req->req.length <= req->req.actual) ? 1 : 0;
483 udc_write(idx, S3C2410_UDC_INDEX_REG);
484 fifo_count = s3c2410_udc_fifo_count_out();
486 /* Only ep0 debug messages are interesting */
488 dprintk(DEBUG_VERBOSE, "%s fifo count : %d [last %d]\n",
489 __func__, fifo_count, is_last);
493 s3c2410_udc_set_ep0_de_out(base_addr);
494 ep->dev->ep0state = EP0_IDLE;
496 udc_write(idx, S3C2410_UDC_INDEX_REG);
497 ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
498 udc_write(idx, S3C2410_UDC_INDEX_REG);
499 udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
500 S3C2410_UDC_OUT_CSR1_REG);
503 s3c2410_udc_done(ep, req, 0);
506 s3c2410_udc_clear_ep0_opr(base_addr);
508 udc_write(idx, S3C2410_UDC_INDEX_REG);
509 ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
510 udc_write(idx, S3C2410_UDC_INDEX_REG);
511 udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
512 S3C2410_UDC_OUT_CSR1_REG);
519 static int s3c2410_udc_read_fifo_crq(struct usb_ctrlrequest *crq)
521 unsigned char *outbuf = (unsigned char *)crq;
524 udc_write(0, S3C2410_UDC_INDEX_REG);
526 bytes_read = s3c2410_udc_fifo_count_out();
528 dprintk(DEBUG_NORMAL, "%s: fifo_count=%d\n", __func__, bytes_read);
530 if (bytes_read > sizeof(struct usb_ctrlrequest))
531 bytes_read = sizeof(struct usb_ctrlrequest);
533 readsb(S3C2410_UDC_EP0_FIFO_REG + base_addr, outbuf, bytes_read);
535 dprintk(DEBUG_VERBOSE, "%s: len=%d %02x:%02x {%x,%x,%x}\n", __func__,
536 bytes_read, crq->bRequest, crq->bRequestType,
537 crq->wValue, crq->wIndex, crq->wLength);
542 static int s3c2410_udc_get_status(struct s3c2410_udc *dev,
543 struct usb_ctrlrequest *crq)
546 u8 ep_num = crq->wIndex & 0x7F;
547 u8 is_in = crq->wIndex & USB_DIR_IN;
549 switch (crq->bRequestType & USB_RECIP_MASK) {
550 case USB_RECIP_INTERFACE:
553 case USB_RECIP_DEVICE:
554 status = dev->devstatus;
557 case USB_RECIP_ENDPOINT:
558 if (ep_num > 4 || crq->wLength > 2)
562 udc_write(0, S3C2410_UDC_INDEX_REG);
563 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
564 status = status & S3C2410_UDC_EP0_CSR_SENDSTL;
566 udc_write(ep_num, S3C2410_UDC_INDEX_REG);
568 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
569 status = status & S3C2410_UDC_ICSR1_SENDSTL;
571 status = udc_read(S3C2410_UDC_OUT_CSR1_REG);
572 status = status & S3C2410_UDC_OCSR1_SENDSTL;
576 status = status ? 1 : 0;
583 /* Seems to be needed to get it working. ouch :( */
585 udc_write(status & 0xFF, S3C2410_UDC_EP0_FIFO_REG);
586 udc_write(status >> 8, S3C2410_UDC_EP0_FIFO_REG);
587 s3c2410_udc_set_ep0_de_in(base_addr);
591 /*------------------------- usb state machine -------------------------------*/
592 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value);
594 static void s3c2410_udc_handle_ep0_idle(struct s3c2410_udc *dev,
595 struct s3c2410_ep *ep,
596 struct usb_ctrlrequest *crq,
601 /* start control request? */
602 if (!(ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY))
605 s3c2410_udc_nuke(dev, ep, -EPROTO);
607 len = s3c2410_udc_read_fifo_crq(crq);
608 if (len != sizeof(*crq)) {
609 dprintk(DEBUG_NORMAL, "setup begin: fifo READ ERROR"
610 " wanted %d bytes got %d. Stalling out...\n",
612 s3c2410_udc_set_ep0_ss(base_addr);
616 dprintk(DEBUG_NORMAL, "bRequest = %d bRequestType %d wLength = %d\n",
617 crq->bRequest, crq->bRequestType, crq->wLength);
619 /* cope with automagic for some standard requests. */
620 dev->req_std = (crq->bRequestType & USB_TYPE_MASK)
621 == USB_TYPE_STANDARD;
623 dev->req_pending = 1;
625 switch (crq->bRequest) {
626 case USB_REQ_SET_CONFIGURATION:
627 dprintk(DEBUG_NORMAL, "USB_REQ_SET_CONFIGURATION ...\n");
629 if (crq->bRequestType == USB_RECIP_DEVICE) {
631 s3c2410_udc_set_ep0_de_out(base_addr);
635 case USB_REQ_SET_INTERFACE:
636 dprintk(DEBUG_NORMAL, "USB_REQ_SET_INTERFACE ...\n");
638 if (crq->bRequestType == USB_RECIP_INTERFACE) {
640 s3c2410_udc_set_ep0_de_out(base_addr);
644 case USB_REQ_SET_ADDRESS:
645 dprintk(DEBUG_NORMAL, "USB_REQ_SET_ADDRESS ...\n");
647 if (crq->bRequestType == USB_RECIP_DEVICE) {
648 tmp = crq->wValue & 0x7F;
650 udc_write((tmp | S3C2410_UDC_FUNCADDR_UPDATE),
651 S3C2410_UDC_FUNC_ADDR_REG);
652 s3c2410_udc_set_ep0_de_out(base_addr);
657 case USB_REQ_GET_STATUS:
658 dprintk(DEBUG_NORMAL, "USB_REQ_GET_STATUS ...\n");
659 s3c2410_udc_clear_ep0_opr(base_addr);
662 if (!s3c2410_udc_get_status(dev, crq))
667 case USB_REQ_CLEAR_FEATURE:
668 s3c2410_udc_clear_ep0_opr(base_addr);
670 if (crq->bRequestType != USB_RECIP_ENDPOINT)
673 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
676 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 0);
677 s3c2410_udc_set_ep0_de_out(base_addr);
680 case USB_REQ_SET_FEATURE:
681 s3c2410_udc_clear_ep0_opr(base_addr);
683 if (crq->bRequestType != USB_RECIP_ENDPOINT)
686 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
689 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 1);
690 s3c2410_udc_set_ep0_de_out(base_addr);
694 s3c2410_udc_clear_ep0_opr(base_addr);
698 if (crq->bRequestType & USB_DIR_IN)
699 dev->ep0state = EP0_IN_DATA_PHASE;
701 dev->ep0state = EP0_OUT_DATA_PHASE;
706 /* deliver the request to the gadget driver */
707 ret = dev->driver->setup(&dev->gadget, crq);
709 if (dev->req_config) {
710 dprintk(DEBUG_NORMAL, "config change %02x fail %d?\n",
715 if (ret == -EOPNOTSUPP)
716 dprintk(DEBUG_NORMAL, "Operation not supported\n");
718 dprintk(DEBUG_NORMAL,
719 "dev->driver->setup failed. (%d)\n", ret);
722 s3c2410_udc_set_ep0_ss(base_addr);
723 s3c2410_udc_set_ep0_de_out(base_addr);
724 dev->ep0state = EP0_IDLE;
725 /* deferred i/o == no response yet */
726 } else if (dev->req_pending) {
727 dprintk(DEBUG_VERBOSE, "dev->req_pending... what now?\n");
728 dev->req_pending = 0;
731 dprintk(DEBUG_VERBOSE, "ep0state %s\n", ep0states[dev->ep0state]);
734 static void s3c2410_udc_handle_ep0(struct s3c2410_udc *dev)
737 struct s3c2410_ep *ep = &dev->ep[0];
738 struct s3c2410_request *req;
739 struct usb_ctrlrequest crq;
741 if (list_empty(&ep->queue))
744 req = list_entry(ep->queue.next, struct s3c2410_request, queue);
746 /* We make the assumption that S3C2410_UDC_IN_CSR1_REG equal to
747 * S3C2410_UDC_EP0_CSR_REG when index is zero */
749 udc_write(0, S3C2410_UDC_INDEX_REG);
750 ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
752 dprintk(DEBUG_NORMAL, "ep0csr %x ep0state %s\n",
753 ep0csr, ep0states[dev->ep0state]);
755 /* clear stall status */
756 if (ep0csr & S3C2410_UDC_EP0_CSR_SENTSTL) {
757 s3c2410_udc_nuke(dev, ep, -EPIPE);
758 dprintk(DEBUG_NORMAL, "... clear SENT_STALL ...\n");
759 s3c2410_udc_clear_ep0_sst(base_addr);
760 dev->ep0state = EP0_IDLE;
764 /* clear setup end */
765 if (ep0csr & S3C2410_UDC_EP0_CSR_SE) {
766 dprintk(DEBUG_NORMAL, "... serviced SETUP_END ...\n");
767 s3c2410_udc_nuke(dev, ep, 0);
768 s3c2410_udc_clear_ep0_se(base_addr);
769 dev->ep0state = EP0_IDLE;
772 switch (dev->ep0state) {
774 s3c2410_udc_handle_ep0_idle(dev, ep, &crq, ep0csr);
777 case EP0_IN_DATA_PHASE: /* GET_DESCRIPTOR etc */
778 dprintk(DEBUG_NORMAL, "EP0_IN_DATA_PHASE ... what now?\n");
779 if (!(ep0csr & S3C2410_UDC_EP0_CSR_IPKRDY) && req)
780 s3c2410_udc_write_fifo(ep, req);
783 case EP0_OUT_DATA_PHASE: /* SET_DESCRIPTOR etc */
784 dprintk(DEBUG_NORMAL, "EP0_OUT_DATA_PHASE ... what now?\n");
785 if ((ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY) && req)
786 s3c2410_udc_read_fifo(ep, req);
790 dprintk(DEBUG_NORMAL, "EP0_END_XFER ... what now?\n");
791 dev->ep0state = EP0_IDLE;
795 dprintk(DEBUG_NORMAL, "EP0_STALL ... what now?\n");
796 dev->ep0state = EP0_IDLE;
802 * handle_ep - Manage I/O endpoints
805 static void s3c2410_udc_handle_ep(struct s3c2410_ep *ep)
807 struct s3c2410_request *req;
808 int is_in = ep->bEndpointAddress & USB_DIR_IN;
812 if (likely(!list_empty(&ep->queue)))
813 req = list_entry(ep->queue.next,
814 struct s3c2410_request, queue);
818 idx = ep->bEndpointAddress & 0x7F;
821 udc_write(idx, S3C2410_UDC_INDEX_REG);
822 ep_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
823 dprintk(DEBUG_VERBOSE, "ep%01d write csr:%02x %d\n",
824 idx, ep_csr1, req ? 1 : 0);
826 if (ep_csr1 & S3C2410_UDC_ICSR1_SENTSTL) {
827 dprintk(DEBUG_VERBOSE, "st\n");
828 udc_write(idx, S3C2410_UDC_INDEX_REG);
829 udc_write(ep_csr1 & ~S3C2410_UDC_ICSR1_SENTSTL,
830 S3C2410_UDC_IN_CSR1_REG);
834 if (!(ep_csr1 & S3C2410_UDC_ICSR1_PKTRDY) && req)
835 s3c2410_udc_write_fifo(ep, req);
837 udc_write(idx, S3C2410_UDC_INDEX_REG);
838 ep_csr1 = udc_read(S3C2410_UDC_OUT_CSR1_REG);
839 dprintk(DEBUG_VERBOSE, "ep%01d rd csr:%02x\n", idx, ep_csr1);
841 if (ep_csr1 & S3C2410_UDC_OCSR1_SENTSTL) {
842 udc_write(idx, S3C2410_UDC_INDEX_REG);
843 udc_write(ep_csr1 & ~S3C2410_UDC_OCSR1_SENTSTL,
844 S3C2410_UDC_OUT_CSR1_REG);
848 if ((ep_csr1 & S3C2410_UDC_OCSR1_PKTRDY) && req)
849 s3c2410_udc_read_fifo(ep, req);
853 #include <mach/regs-irq.h>
856 * s3c2410_udc_irq - interrupt handler
858 static irqreturn_t s3c2410_udc_irq(int dummy, void *_dev)
860 struct s3c2410_udc *dev = _dev;
869 spin_lock_irqsave(&dev->lock, flags);
871 /* Driver connected ? */
873 /* Clear interrupts */
874 udc_write(udc_read(S3C2410_UDC_USB_INT_REG),
875 S3C2410_UDC_USB_INT_REG);
876 udc_write(udc_read(S3C2410_UDC_EP_INT_REG),
877 S3C2410_UDC_EP_INT_REG);
881 idx = udc_read(S3C2410_UDC_INDEX_REG);
883 /* Read status registers */
884 usb_status = udc_read(S3C2410_UDC_USB_INT_REG);
885 usbd_status = udc_read(S3C2410_UDC_EP_INT_REG);
886 pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
888 udc_writeb(base_addr, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
889 ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
891 dprintk(DEBUG_NORMAL, "usbs=%02x, usbds=%02x, pwr=%02x ep0csr=%02x\n",
892 usb_status, usbd_status, pwr_reg, ep0csr);
895 * Now, handle interrupts. There's two types :
896 * - Reset, Resume, Suspend coming -> usb_int_reg
901 if (usb_status & S3C2410_UDC_USBINT_RESET) {
902 /* two kind of reset :
903 * - reset start -> pwr reg = 8
904 * - reset end -> pwr reg = 0
906 dprintk(DEBUG_NORMAL, "USB reset csr %x pwr %x\n",
909 dev->gadget.speed = USB_SPEED_UNKNOWN;
910 udc_write(0x00, S3C2410_UDC_INDEX_REG);
911 udc_write((dev->ep[0].ep.maxpacket & 0x7ff) >> 3,
912 S3C2410_UDC_MAXP_REG);
915 dev->ep0state = EP0_IDLE;
916 dev->gadget.speed = USB_SPEED_FULL;
918 /* clear interrupt */
919 udc_write(S3C2410_UDC_USBINT_RESET,
920 S3C2410_UDC_USB_INT_REG);
922 udc_write(idx, S3C2410_UDC_INDEX_REG);
923 spin_unlock_irqrestore(&dev->lock, flags);
928 if (usb_status & S3C2410_UDC_USBINT_RESUME) {
929 dprintk(DEBUG_NORMAL, "USB resume\n");
931 /* clear interrupt */
932 udc_write(S3C2410_UDC_USBINT_RESUME,
933 S3C2410_UDC_USB_INT_REG);
935 if (dev->gadget.speed != USB_SPEED_UNKNOWN
937 && dev->driver->resume)
938 dev->driver->resume(&dev->gadget);
942 if (usb_status & S3C2410_UDC_USBINT_SUSPEND) {
943 dprintk(DEBUG_NORMAL, "USB suspend\n");
945 /* clear interrupt */
946 udc_write(S3C2410_UDC_USBINT_SUSPEND,
947 S3C2410_UDC_USB_INT_REG);
949 if (dev->gadget.speed != USB_SPEED_UNKNOWN
951 && dev->driver->suspend)
952 dev->driver->suspend(&dev->gadget);
954 dev->ep0state = EP0_IDLE;
958 /* control traffic */
959 /* check on ep0csr != 0 is not a good idea as clearing in_pkt_ready
960 * generate an interrupt
962 if (usbd_status & S3C2410_UDC_INT_EP0) {
963 dprintk(DEBUG_VERBOSE, "USB ep0 irq\n");
964 /* Clear the interrupt bit by setting it to 1 */
965 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_REG);
966 s3c2410_udc_handle_ep0(dev);
969 /* endpoint data transfers */
970 for (i = 1; i < S3C2410_ENDPOINTS; i++) {
972 if (usbd_status & tmp) {
973 dprintk(DEBUG_VERBOSE, "USB ep%d irq\n", i);
975 /* Clear the interrupt bit by setting it to 1 */
976 udc_write(tmp, S3C2410_UDC_EP_INT_REG);
977 s3c2410_udc_handle_ep(&dev->ep[i]);
981 /* what else causes this interrupt? a receive! who is it? */
982 if (!usb_status && !usbd_status && !pwr_reg && !ep0csr) {
983 for (i = 1; i < S3C2410_ENDPOINTS; i++) {
984 idx2 = udc_read(S3C2410_UDC_INDEX_REG);
985 udc_write(i, S3C2410_UDC_INDEX_REG);
987 if (udc_read(S3C2410_UDC_OUT_CSR1_REG) & 0x1)
988 s3c2410_udc_handle_ep(&dev->ep[i]);
991 udc_write(idx2, S3C2410_UDC_INDEX_REG);
995 dprintk(DEBUG_VERBOSE, "irq: %d s3c2410_udc_done.\n", IRQ_USBD);
997 /* Restore old index */
998 udc_write(idx, S3C2410_UDC_INDEX_REG);
1000 spin_unlock_irqrestore(&dev->lock, flags);
1004 /*------------------------- s3c2410_ep_ops ----------------------------------*/
1006 static inline struct s3c2410_ep *to_s3c2410_ep(struct usb_ep *ep)
1008 return container_of(ep, struct s3c2410_ep, ep);
1011 static inline struct s3c2410_udc *to_s3c2410_udc(struct usb_gadget *gadget)
1013 return container_of(gadget, struct s3c2410_udc, gadget);
1016 static inline struct s3c2410_request *to_s3c2410_req(struct usb_request *req)
1018 return container_of(req, struct s3c2410_request, req);
1022 * s3c2410_udc_ep_enable
1024 static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
1025 const struct usb_endpoint_descriptor *desc)
1027 struct s3c2410_udc *dev;
1028 struct s3c2410_ep *ep;
1030 unsigned long flags;
1034 ep = to_s3c2410_ep(_ep);
1037 || _ep->name == ep0name
1038 || desc->bDescriptorType != USB_DT_ENDPOINT)
1042 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
1045 max = usb_endpoint_maxp(desc);
1047 local_irq_save(flags);
1048 _ep->maxpacket = max;
1051 ep->bEndpointAddress = desc->bEndpointAddress;
1053 /* set max packet */
1054 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1055 udc_write(max >> 3, S3C2410_UDC_MAXP_REG);
1057 /* set type, direction, address; reset fifo counters */
1058 if (desc->bEndpointAddress & USB_DIR_IN) {
1059 csr1 = S3C2410_UDC_ICSR1_FFLUSH|S3C2410_UDC_ICSR1_CLRDT;
1060 csr2 = S3C2410_UDC_ICSR2_MODEIN|S3C2410_UDC_ICSR2_DMAIEN;
1062 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1063 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1064 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1065 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1067 /* don't flush in fifo or it will cause endpoint interrupt */
1068 csr1 = S3C2410_UDC_ICSR1_CLRDT;
1069 csr2 = S3C2410_UDC_ICSR2_DMAIEN;
1071 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1072 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1073 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1074 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1076 csr1 = S3C2410_UDC_OCSR1_FFLUSH | S3C2410_UDC_OCSR1_CLRDT;
1077 csr2 = S3C2410_UDC_OCSR2_DMAIEN;
1079 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1080 udc_write(csr1, S3C2410_UDC_OUT_CSR1_REG);
1081 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1082 udc_write(csr2, S3C2410_UDC_OUT_CSR2_REG);
1086 int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1087 udc_write(int_en_reg | (1 << ep->num), S3C2410_UDC_EP_INT_EN_REG);
1089 /* print some debug message */
1090 tmp = desc->bEndpointAddress;
1091 dprintk(DEBUG_NORMAL, "enable %s(%d) ep%x%s-blk max %02x\n",
1092 _ep->name, ep->num, tmp,
1093 desc->bEndpointAddress & USB_DIR_IN ? "in" : "out", max);
1095 local_irq_restore(flags);
1096 s3c2410_udc_set_halt(_ep, 0);
1102 * s3c2410_udc_ep_disable
1104 static int s3c2410_udc_ep_disable(struct usb_ep *_ep)
1106 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1107 unsigned long flags;
1110 if (!_ep || !ep->ep.desc) {
1111 dprintk(DEBUG_NORMAL, "%s not enabled\n",
1112 _ep ? ep->ep.name : NULL);
1116 local_irq_save(flags);
1118 dprintk(DEBUG_NORMAL, "ep_disable: %s\n", _ep->name);
1123 s3c2410_udc_nuke(ep->dev, ep, -ESHUTDOWN);
1126 int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1127 udc_write(int_en_reg & ~(1<<ep->num), S3C2410_UDC_EP_INT_EN_REG);
1129 local_irq_restore(flags);
1131 dprintk(DEBUG_NORMAL, "%s disabled\n", _ep->name);
1137 * s3c2410_udc_alloc_request
1139 static struct usb_request *
1140 s3c2410_udc_alloc_request(struct usb_ep *_ep, gfp_t mem_flags)
1142 struct s3c2410_request *req;
1144 dprintk(DEBUG_VERBOSE, "%s(%p,%d)\n", __func__, _ep, mem_flags);
1149 req = kzalloc(sizeof(struct s3c2410_request), mem_flags);
1153 INIT_LIST_HEAD(&req->queue);
1158 * s3c2410_udc_free_request
1161 s3c2410_udc_free_request(struct usb_ep *_ep, struct usb_request *_req)
1163 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1164 struct s3c2410_request *req = to_s3c2410_req(_req);
1166 dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1168 if (!ep || !_req || (!ep->ep.desc && _ep->name != ep0name))
1171 WARN_ON(!list_empty(&req->queue));
1178 static int s3c2410_udc_queue(struct usb_ep *_ep, struct usb_request *_req,
1181 struct s3c2410_request *req = to_s3c2410_req(_req);
1182 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1183 struct s3c2410_udc *dev;
1186 unsigned long flags;
1188 if (unlikely(!_ep || (!ep->ep.desc && ep->ep.name != ep0name))) {
1189 dprintk(DEBUG_NORMAL, "%s: invalid args\n", __func__);
1194 if (unlikely(!dev->driver
1195 || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
1199 local_irq_save(flags);
1201 if (unlikely(!_req || !_req->complete
1202 || !_req->buf || !list_empty(&req->queue))) {
1204 dprintk(DEBUG_NORMAL, "%s: 1 X X X\n", __func__);
1206 dprintk(DEBUG_NORMAL, "%s: 0 %01d %01d %01d\n",
1207 __func__, !_req->complete, !_req->buf,
1208 !list_empty(&req->queue));
1211 local_irq_restore(flags);
1215 _req->status = -EINPROGRESS;
1218 dprintk(DEBUG_VERBOSE, "%s: ep%x len %d\n",
1219 __func__, ep->bEndpointAddress, _req->length);
1221 if (ep->bEndpointAddress) {
1222 udc_write(ep->bEndpointAddress & 0x7F, S3C2410_UDC_INDEX_REG);
1224 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1225 ? S3C2410_UDC_IN_CSR1_REG
1226 : S3C2410_UDC_OUT_CSR1_REG);
1227 fifo_count = s3c2410_udc_fifo_count_out();
1229 udc_write(0, S3C2410_UDC_INDEX_REG);
1230 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
1231 fifo_count = s3c2410_udc_fifo_count_out();
1234 /* kickstart this i/o queue? */
1235 if (list_empty(&ep->queue) && !ep->halted) {
1236 if (ep->bEndpointAddress == 0 /* ep0 */) {
1237 switch (dev->ep0state) {
1238 case EP0_IN_DATA_PHASE:
1239 if (!(ep_csr&S3C2410_UDC_EP0_CSR_IPKRDY)
1240 && s3c2410_udc_write_fifo(ep,
1242 dev->ep0state = EP0_IDLE;
1247 case EP0_OUT_DATA_PHASE:
1249 || ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1250 && s3c2410_udc_read_fifo(ep,
1252 dev->ep0state = EP0_IDLE;
1258 local_irq_restore(flags);
1261 } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0
1262 && (!(ep_csr&S3C2410_UDC_OCSR1_PKTRDY))
1263 && s3c2410_udc_write_fifo(ep, req)) {
1265 } else if ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1267 && s3c2410_udc_read_fifo(ep, req)) {
1272 /* pio or dma irq handler advances the queue. */
1274 list_add_tail(&req->queue, &ep->queue);
1276 local_irq_restore(flags);
1278 dprintk(DEBUG_VERBOSE, "%s ok\n", __func__);
1283 * s3c2410_udc_dequeue
1285 static int s3c2410_udc_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1287 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1288 struct s3c2410_udc *udc;
1289 int retval = -EINVAL;
1290 unsigned long flags;
1291 struct s3c2410_request *req = NULL;
1293 dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1295 if (!the_controller->driver)
1301 udc = to_s3c2410_udc(ep->gadget);
1303 local_irq_save(flags);
1305 list_for_each_entry(req, &ep->queue, queue) {
1306 if (&req->req == _req) {
1307 list_del_init(&req->queue);
1308 _req->status = -ECONNRESET;
1315 dprintk(DEBUG_VERBOSE,
1316 "dequeued req %p from %s, len %d buf %p\n",
1317 req, _ep->name, _req->length, _req->buf);
1319 s3c2410_udc_done(ep, req, -ECONNRESET);
1322 local_irq_restore(flags);
1327 * s3c2410_udc_set_halt
1329 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value)
1331 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1333 unsigned long flags;
1336 if (unlikely(!_ep || (!ep->ep.desc && ep->ep.name != ep0name))) {
1337 dprintk(DEBUG_NORMAL, "%s: inval 2\n", __func__);
1341 local_irq_save(flags);
1343 idx = ep->bEndpointAddress & 0x7F;
1346 s3c2410_udc_set_ep0_ss(base_addr);
1347 s3c2410_udc_set_ep0_de_out(base_addr);
1349 udc_write(idx, S3C2410_UDC_INDEX_REG);
1350 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1351 ? S3C2410_UDC_IN_CSR1_REG
1352 : S3C2410_UDC_OUT_CSR1_REG);
1354 if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
1356 udc_write(ep_csr | S3C2410_UDC_ICSR1_SENDSTL,
1357 S3C2410_UDC_IN_CSR1_REG);
1359 ep_csr &= ~S3C2410_UDC_ICSR1_SENDSTL;
1360 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1361 ep_csr |= S3C2410_UDC_ICSR1_CLRDT;
1362 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1366 udc_write(ep_csr | S3C2410_UDC_OCSR1_SENDSTL,
1367 S3C2410_UDC_OUT_CSR1_REG);
1369 ep_csr &= ~S3C2410_UDC_OCSR1_SENDSTL;
1370 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1371 ep_csr |= S3C2410_UDC_OCSR1_CLRDT;
1372 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1377 ep->halted = value ? 1 : 0;
1378 local_irq_restore(flags);
1383 static const struct usb_ep_ops s3c2410_ep_ops = {
1384 .enable = s3c2410_udc_ep_enable,
1385 .disable = s3c2410_udc_ep_disable,
1387 .alloc_request = s3c2410_udc_alloc_request,
1388 .free_request = s3c2410_udc_free_request,
1390 .queue = s3c2410_udc_queue,
1391 .dequeue = s3c2410_udc_dequeue,
1393 .set_halt = s3c2410_udc_set_halt,
1396 /*------------------------- usb_gadget_ops ----------------------------------*/
1399 * s3c2410_udc_get_frame
1401 static int s3c2410_udc_get_frame(struct usb_gadget *_gadget)
1405 dprintk(DEBUG_VERBOSE, "%s()\n", __func__);
1407 tmp = udc_read(S3C2410_UDC_FRAME_NUM2_REG) << 8;
1408 tmp |= udc_read(S3C2410_UDC_FRAME_NUM1_REG);
1413 * s3c2410_udc_wakeup
1415 static int s3c2410_udc_wakeup(struct usb_gadget *_gadget)
1417 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1422 * s3c2410_udc_set_selfpowered
1424 static int s3c2410_udc_set_selfpowered(struct usb_gadget *gadget, int value)
1426 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1428 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1430 gadget->is_selfpowered = (value != 0);
1432 udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
1434 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
1439 static void s3c2410_udc_disable(struct s3c2410_udc *dev);
1440 static void s3c2410_udc_enable(struct s3c2410_udc *dev);
1442 static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on)
1444 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1446 if (udc_info && (udc_info->udc_command ||
1447 gpio_is_valid(udc_info->pullup_pin))) {
1450 s3c2410_udc_enable(udc);
1452 if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
1453 if (udc->driver && udc->driver->disconnect)
1454 udc->driver->disconnect(&udc->gadget);
1457 s3c2410_udc_disable(udc);
1466 static int s3c2410_udc_vbus_session(struct usb_gadget *gadget, int is_active)
1468 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1470 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1472 udc->vbus = (is_active != 0);
1473 s3c2410_udc_set_pullup(udc, is_active);
1477 static int s3c2410_udc_pullup(struct usb_gadget *gadget, int is_on)
1479 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1481 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1483 s3c2410_udc_set_pullup(udc, is_on);
1487 static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev)
1489 struct s3c2410_udc *dev = _dev;
1492 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1494 value = gpio_get_value(udc_info->vbus_pin) ? 1 : 0;
1495 if (udc_info->vbus_pin_inverted)
1498 if (value != dev->vbus)
1499 s3c2410_udc_vbus_session(&dev->gadget, value);
1504 static int s3c2410_vbus_draw(struct usb_gadget *_gadget, unsigned ma)
1506 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1508 if (udc_info && udc_info->vbus_draw) {
1509 udc_info->vbus_draw(ma);
1516 static int s3c2410_udc_start(struct usb_gadget *g,
1517 struct usb_gadget_driver *driver);
1518 static int s3c2410_udc_stop(struct usb_gadget *g);
1520 static const struct usb_gadget_ops s3c2410_ops = {
1521 .get_frame = s3c2410_udc_get_frame,
1522 .wakeup = s3c2410_udc_wakeup,
1523 .set_selfpowered = s3c2410_udc_set_selfpowered,
1524 .pullup = s3c2410_udc_pullup,
1525 .vbus_session = s3c2410_udc_vbus_session,
1526 .vbus_draw = s3c2410_vbus_draw,
1527 .udc_start = s3c2410_udc_start,
1528 .udc_stop = s3c2410_udc_stop,
1531 static void s3c2410_udc_command(enum s3c2410_udc_cmd_e cmd)
1536 if (udc_info->udc_command) {
1537 udc_info->udc_command(cmd);
1538 } else if (gpio_is_valid(udc_info->pullup_pin)) {
1542 case S3C2410_UDC_P_ENABLE:
1545 case S3C2410_UDC_P_DISABLE:
1551 value ^= udc_info->pullup_pin_inverted;
1553 gpio_set_value(udc_info->pullup_pin, value);
1557 /*------------------------- gadget driver handling---------------------------*/
1559 * s3c2410_udc_disable
1561 static void s3c2410_udc_disable(struct s3c2410_udc *dev)
1563 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1565 /* Disable all interrupts */
1566 udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG);
1567 udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG);
1569 /* Clear the interrupt registers */
1570 udc_write(S3C2410_UDC_USBINT_RESET
1571 | S3C2410_UDC_USBINT_RESUME
1572 | S3C2410_UDC_USBINT_SUSPEND,
1573 S3C2410_UDC_USB_INT_REG);
1575 udc_write(0x1F, S3C2410_UDC_EP_INT_REG);
1577 /* Good bye, cruel world */
1578 s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
1580 /* Set speed to unknown */
1581 dev->gadget.speed = USB_SPEED_UNKNOWN;
1585 * s3c2410_udc_reinit
1587 static void s3c2410_udc_reinit(struct s3c2410_udc *dev)
1591 /* device/ep0 records init */
1592 INIT_LIST_HEAD(&dev->gadget.ep_list);
1593 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
1594 dev->ep0state = EP0_IDLE;
1596 for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1597 struct s3c2410_ep *ep = &dev->ep[i];
1600 list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
1605 INIT_LIST_HEAD(&ep->queue);
1606 usb_ep_set_maxpacket_limit(&ep->ep, ep->ep.maxpacket);
1611 * s3c2410_udc_enable
1613 static void s3c2410_udc_enable(struct s3c2410_udc *dev)
1617 dprintk(DEBUG_NORMAL, "s3c2410_udc_enable called\n");
1619 /* dev->gadget.speed = USB_SPEED_UNKNOWN; */
1620 dev->gadget.speed = USB_SPEED_FULL;
1622 /* Set MAXP for all endpoints */
1623 for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1624 udc_write(i, S3C2410_UDC_INDEX_REG);
1625 udc_write((dev->ep[i].ep.maxpacket & 0x7ff) >> 3,
1626 S3C2410_UDC_MAXP_REG);
1629 /* Set default power state */
1630 udc_write(DEFAULT_POWER_STATE, S3C2410_UDC_PWR_REG);
1632 /* Enable reset and suspend interrupt interrupts */
1633 udc_write(S3C2410_UDC_USBINT_RESET | S3C2410_UDC_USBINT_SUSPEND,
1634 S3C2410_UDC_USB_INT_EN_REG);
1636 /* Enable ep0 interrupt */
1637 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG);
1639 /* time to say "hello, world" */
1640 s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
1643 static int s3c2410_udc_start(struct usb_gadget *g,
1644 struct usb_gadget_driver *driver)
1646 struct s3c2410_udc *udc = to_s3c2410(g);
1648 dprintk(DEBUG_NORMAL, "%s() '%s'\n", __func__, driver->driver.name);
1650 /* Hook the driver */
1651 udc->driver = driver;
1654 s3c2410_udc_enable(udc);
1659 static int s3c2410_udc_stop(struct usb_gadget *g)
1661 struct s3c2410_udc *udc = to_s3c2410(g);
1666 s3c2410_udc_disable(udc);
1671 /*---------------------------------------------------------------------------*/
1672 static struct s3c2410_udc memory = {
1674 .ops = &s3c2410_ops,
1675 .ep0 = &memory.ep[0].ep,
1676 .name = gadget_name,
1678 .init_name = "gadget",
1682 /* control endpoint */
1687 .ops = &s3c2410_ep_ops,
1688 .maxpacket = EP0_FIFO_SIZE,
1689 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL,
1690 USB_EP_CAPS_DIR_ALL),
1695 /* first group of endpoints */
1700 .ops = &s3c2410_ep_ops,
1701 .maxpacket = EP_FIFO_SIZE,
1702 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1703 USB_EP_CAPS_DIR_ALL),
1706 .fifo_size = EP_FIFO_SIZE,
1707 .bEndpointAddress = 1,
1708 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1714 .ops = &s3c2410_ep_ops,
1715 .maxpacket = EP_FIFO_SIZE,
1716 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1717 USB_EP_CAPS_DIR_ALL),
1720 .fifo_size = EP_FIFO_SIZE,
1721 .bEndpointAddress = 2,
1722 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1728 .ops = &s3c2410_ep_ops,
1729 .maxpacket = EP_FIFO_SIZE,
1730 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1731 USB_EP_CAPS_DIR_ALL),
1734 .fifo_size = EP_FIFO_SIZE,
1735 .bEndpointAddress = 3,
1736 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1742 .ops = &s3c2410_ep_ops,
1743 .maxpacket = EP_FIFO_SIZE,
1744 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1745 USB_EP_CAPS_DIR_ALL),
1748 .fifo_size = EP_FIFO_SIZE,
1749 .bEndpointAddress = 4,
1750 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1756 * probe - binds to the platform device
1758 static int s3c2410_udc_probe(struct platform_device *pdev)
1760 struct s3c2410_udc *udc = &memory;
1761 struct device *dev = &pdev->dev;
1765 dev_dbg(dev, "%s()\n", __func__);
1767 usb_bus_clock = clk_get(NULL, "usb-bus-gadget");
1768 if (IS_ERR(usb_bus_clock)) {
1769 dev_err(dev, "failed to get usb bus clock source\n");
1770 return PTR_ERR(usb_bus_clock);
1773 clk_prepare_enable(usb_bus_clock);
1775 udc_clock = clk_get(NULL, "usb-device");
1776 if (IS_ERR(udc_clock)) {
1777 dev_err(dev, "failed to get udc clock source\n");
1778 return PTR_ERR(udc_clock);
1781 clk_prepare_enable(udc_clock);
1785 dev_dbg(dev, "got and enabled clocks\n");
1787 if (strncmp(pdev->name, "s3c2440", 7) == 0) {
1788 dev_info(dev, "S3C2440: increasing FIFO to 128 bytes\n");
1789 memory.ep[1].fifo_size = S3C2440_EP_FIFO_SIZE;
1790 memory.ep[2].fifo_size = S3C2440_EP_FIFO_SIZE;
1791 memory.ep[3].fifo_size = S3C2440_EP_FIFO_SIZE;
1792 memory.ep[4].fifo_size = S3C2440_EP_FIFO_SIZE;
1795 spin_lock_init(&udc->lock);
1796 udc_info = dev_get_platdata(&pdev->dev);
1798 rsrc_start = S3C2410_PA_USBDEV;
1799 rsrc_len = S3C24XX_SZ_USBDEV;
1801 if (!request_mem_region(rsrc_start, rsrc_len, gadget_name))
1804 base_addr = ioremap(rsrc_start, rsrc_len);
1810 the_controller = udc;
1811 platform_set_drvdata(pdev, udc);
1813 s3c2410_udc_disable(udc);
1814 s3c2410_udc_reinit(udc);
1816 /* irq setup after old hardware state is cleaned up */
1817 retval = request_irq(IRQ_USBD, s3c2410_udc_irq,
1818 0, gadget_name, udc);
1821 dev_err(dev, "cannot get irq %i, err %d\n", IRQ_USBD, retval);
1826 dev_dbg(dev, "got irq %i\n", IRQ_USBD);
1828 if (udc_info && udc_info->vbus_pin > 0) {
1829 retval = gpio_request(udc_info->vbus_pin, "udc vbus");
1831 dev_err(dev, "cannot claim vbus pin\n");
1835 irq = gpio_to_irq(udc_info->vbus_pin);
1837 dev_err(dev, "no irq for gpio vbus pin\n");
1839 goto err_gpio_claim;
1842 retval = request_irq(irq, s3c2410_udc_vbus_irq,
1844 | IRQF_TRIGGER_FALLING | IRQF_SHARED,
1848 dev_err(dev, "can't get vbus irq %d, err %d\n",
1851 goto err_gpio_claim;
1854 dev_dbg(dev, "got irq %i\n", irq);
1859 if (udc_info && !udc_info->udc_command &&
1860 gpio_is_valid(udc_info->pullup_pin)) {
1862 retval = gpio_request_one(udc_info->pullup_pin,
1863 udc_info->vbus_pin_inverted ?
1864 GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
1870 retval = usb_add_gadget_udc(&pdev->dev, &udc->gadget);
1874 if (s3c2410_udc_debugfs_root) {
1875 udc->regs_info = debugfs_create_file("registers", S_IRUGO,
1876 s3c2410_udc_debugfs_root,
1877 udc, &s3c2410_udc_debugfs_fops);
1878 if (!udc->regs_info)
1879 dev_warn(dev, "debugfs file creation failed\n");
1882 dev_dbg(dev, "probe ok\n");
1887 if (udc_info && !udc_info->udc_command &&
1888 gpio_is_valid(udc_info->pullup_pin))
1889 gpio_free(udc_info->pullup_pin);
1891 if (udc_info && udc_info->vbus_pin > 0)
1892 free_irq(gpio_to_irq(udc_info->vbus_pin), udc);
1894 if (udc_info && udc_info->vbus_pin > 0)
1895 gpio_free(udc_info->vbus_pin);
1897 free_irq(IRQ_USBD, udc);
1901 release_mem_region(rsrc_start, rsrc_len);
1907 * s3c2410_udc_remove
1909 static int s3c2410_udc_remove(struct platform_device *pdev)
1911 struct s3c2410_udc *udc = platform_get_drvdata(pdev);
1914 dev_dbg(&pdev->dev, "%s()\n", __func__);
1919 usb_del_gadget_udc(&udc->gadget);
1920 debugfs_remove(udc->regs_info);
1922 if (udc_info && !udc_info->udc_command &&
1923 gpio_is_valid(udc_info->pullup_pin))
1924 gpio_free(udc_info->pullup_pin);
1926 if (udc_info && udc_info->vbus_pin > 0) {
1927 irq = gpio_to_irq(udc_info->vbus_pin);
1931 free_irq(IRQ_USBD, udc);
1934 release_mem_region(rsrc_start, rsrc_len);
1936 if (!IS_ERR(udc_clock) && udc_clock != NULL) {
1937 clk_disable_unprepare(udc_clock);
1942 if (!IS_ERR(usb_bus_clock) && usb_bus_clock != NULL) {
1943 clk_disable_unprepare(usb_bus_clock);
1944 clk_put(usb_bus_clock);
1945 usb_bus_clock = NULL;
1948 dev_dbg(&pdev->dev, "%s: remove ok\n", __func__);
1954 s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message)
1956 s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
1961 static int s3c2410_udc_resume(struct platform_device *pdev)
1963 s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
1968 #define s3c2410_udc_suspend NULL
1969 #define s3c2410_udc_resume NULL
1972 static const struct platform_device_id s3c_udc_ids[] = {
1973 { "s3c2410-usbgadget", },
1974 { "s3c2440-usbgadget", },
1977 MODULE_DEVICE_TABLE(platform, s3c_udc_ids);
1979 static struct platform_driver udc_driver_24x0 = {
1981 .name = "s3c24x0-usbgadget",
1983 .probe = s3c2410_udc_probe,
1984 .remove = s3c2410_udc_remove,
1985 .suspend = s3c2410_udc_suspend,
1986 .resume = s3c2410_udc_resume,
1987 .id_table = s3c_udc_ids,
1990 static int __init udc_init(void)
1994 dprintk(DEBUG_NORMAL, "%s\n", gadget_name);
1996 s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name, NULL);
1997 if (IS_ERR(s3c2410_udc_debugfs_root)) {
1998 pr_err("%s: debugfs dir creation failed %ld\n",
1999 gadget_name, PTR_ERR(s3c2410_udc_debugfs_root));
2000 s3c2410_udc_debugfs_root = NULL;
2003 retval = platform_driver_register(&udc_driver_24x0);
2010 debugfs_remove(s3c2410_udc_debugfs_root);
2014 static void __exit udc_exit(void)
2016 platform_driver_unregister(&udc_driver_24x0);
2017 debugfs_remove(s3c2410_udc_debugfs_root);
2020 module_init(udc_init);
2021 module_exit(udc_exit);
2023 MODULE_AUTHOR(DRIVER_AUTHOR);
2024 MODULE_DESCRIPTION(DRIVER_DESC);
2025 MODULE_LICENSE("GPL");