1 // SPDX-License-Identifier: GPL-2.0+
3 * linux/drivers/usb/gadget/s3c2410_udc.c
5 * Samsung S3C24xx series on-chip full speed USB device controllers
7 * Copyright (C) 2004-2007 Herbert Pötzl - Arnaud Patard
8 * Additional cleanups by Ben Dooks <ben-linux@fluff.org>
11 #define pr_fmt(fmt) "s3c2410_udc: " fmt
13 #include <linux/module.h>
14 #include <linux/kernel.h>
15 #include <linux/delay.h>
16 #include <linux/ioport.h>
17 #include <linux/sched.h>
18 #include <linux/slab.h>
19 #include <linux/errno.h>
20 #include <linux/init.h>
21 #include <linux/timer.h>
22 #include <linux/list.h>
23 #include <linux/interrupt.h>
24 #include <linux/platform_device.h>
25 #include <linux/clk.h>
26 #include <linux/gpio.h>
27 #include <linux/prefetch.h>
30 #include <linux/debugfs.h>
31 #include <linux/seq_file.h>
33 #include <linux/usb.h>
34 #include <linux/usb/gadget.h>
36 #include <asm/byteorder.h>
38 #include <asm/unaligned.h>
40 #include <linux/platform_data/usb-s3c2410_udc.h>
42 #include "s3c2410_udc.h"
43 #include "s3c2410_udc_regs.h"
45 #define DRIVER_DESC "S3C2410 USB Device Controller Gadget"
46 #define DRIVER_AUTHOR "Herbert Pötzl <herbert@13thfloor.at>, " \
47 "Arnaud Patard <arnaud.patard@rtp-net.org>"
49 static const char gadget_name[] = "s3c2410_udc";
50 static const char driver_desc[] = DRIVER_DESC;
52 static struct s3c2410_udc *the_controller;
53 static struct clk *udc_clock;
54 static struct clk *usb_bus_clock;
55 static void __iomem *base_addr;
57 static struct dentry *s3c2410_udc_debugfs_root;
59 static inline u32 udc_read(u32 reg)
61 return readb(base_addr + reg);
64 static inline void udc_write(u32 value, u32 reg)
66 writeb(value, base_addr + reg);
69 static inline void udc_writeb(void __iomem *base, u32 value, u32 reg)
71 writeb(value, base + reg);
74 static struct s3c2410_udc_mach_info *udc_info;
76 /*************************** DEBUG FUNCTION ***************************/
77 #define DEBUG_NORMAL 1
78 #define DEBUG_VERBOSE 2
80 #ifdef CONFIG_USB_S3C2410_DEBUG
81 #define USB_S3C2410_DEBUG_LEVEL 0
83 static uint32_t s3c2410_ticks = 0;
86 static void dprintk(int level, const char *fmt, ...)
88 static long prevticks;
89 static int invocation;
93 if (level > USB_S3C2410_DEBUG_LEVEL)
101 if (s3c2410_ticks != prevticks) {
102 prevticks = s3c2410_ticks;
106 pr_debug("%1lu.%02d USB: %pV", prevticks, invocation++, &vaf);
112 static void dprintk(int level, const char *fmt, ...)
117 static int s3c2410_udc_debugfs_show(struct seq_file *m, void *p)
119 u32 addr_reg, pwr_reg, ep_int_reg, usb_int_reg;
120 u32 ep_int_en_reg, usb_int_en_reg, ep0_csr;
121 u32 ep1_i_csr1, ep1_i_csr2, ep1_o_csr1, ep1_o_csr2;
122 u32 ep2_i_csr1, ep2_i_csr2, ep2_o_csr1, ep2_o_csr2;
124 addr_reg = udc_read(S3C2410_UDC_FUNC_ADDR_REG);
125 pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
126 ep_int_reg = udc_read(S3C2410_UDC_EP_INT_REG);
127 usb_int_reg = udc_read(S3C2410_UDC_USB_INT_REG);
128 ep_int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
129 usb_int_en_reg = udc_read(S3C2410_UDC_USB_INT_EN_REG);
130 udc_write(0, S3C2410_UDC_INDEX_REG);
131 ep0_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
132 udc_write(1, S3C2410_UDC_INDEX_REG);
133 ep1_i_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
134 ep1_i_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
135 ep1_o_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
136 ep1_o_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
137 udc_write(2, S3C2410_UDC_INDEX_REG);
138 ep2_i_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
139 ep2_i_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
140 ep2_o_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
141 ep2_o_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
143 seq_printf(m, "FUNC_ADDR_REG : 0x%04X\n"
145 "EP_INT_REG : 0x%04X\n"
146 "USB_INT_REG : 0x%04X\n"
147 "EP_INT_EN_REG : 0x%04X\n"
148 "USB_INT_EN_REG : 0x%04X\n"
150 "EP1_I_CSR1 : 0x%04X\n"
151 "EP1_I_CSR2 : 0x%04X\n"
152 "EP1_O_CSR1 : 0x%04X\n"
153 "EP1_O_CSR2 : 0x%04X\n"
154 "EP2_I_CSR1 : 0x%04X\n"
155 "EP2_I_CSR2 : 0x%04X\n"
156 "EP2_O_CSR1 : 0x%04X\n"
157 "EP2_O_CSR2 : 0x%04X\n",
158 addr_reg, pwr_reg, ep_int_reg, usb_int_reg,
159 ep_int_en_reg, usb_int_en_reg, ep0_csr,
160 ep1_i_csr1, ep1_i_csr2, ep1_o_csr1, ep1_o_csr2,
161 ep2_i_csr1, ep2_i_csr2, ep2_o_csr1, ep2_o_csr2
166 DEFINE_SHOW_ATTRIBUTE(s3c2410_udc_debugfs);
170 static inline void s3c2410_udc_clear_ep0_opr(void __iomem *base)
172 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
173 udc_writeb(base, S3C2410_UDC_EP0_CSR_SOPKTRDY,
174 S3C2410_UDC_EP0_CSR_REG);
177 static inline void s3c2410_udc_clear_ep0_sst(void __iomem *base)
179 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
180 writeb(0x00, base + S3C2410_UDC_EP0_CSR_REG);
183 static inline void s3c2410_udc_clear_ep0_se(void __iomem *base)
185 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
186 udc_writeb(base, S3C2410_UDC_EP0_CSR_SSE, S3C2410_UDC_EP0_CSR_REG);
189 static inline void s3c2410_udc_set_ep0_ipr(void __iomem *base)
191 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
192 udc_writeb(base, S3C2410_UDC_EP0_CSR_IPKRDY, S3C2410_UDC_EP0_CSR_REG);
195 static inline void s3c2410_udc_set_ep0_de(void __iomem *base)
197 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
198 udc_writeb(base, S3C2410_UDC_EP0_CSR_DE, S3C2410_UDC_EP0_CSR_REG);
201 static inline void s3c2410_udc_set_ep0_ss(void __iomem *b)
203 udc_writeb(b, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
204 udc_writeb(b, S3C2410_UDC_EP0_CSR_SENDSTL, S3C2410_UDC_EP0_CSR_REG);
207 static inline void s3c2410_udc_set_ep0_de_out(void __iomem *base)
209 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
211 udc_writeb(base, (S3C2410_UDC_EP0_CSR_SOPKTRDY
212 | S3C2410_UDC_EP0_CSR_DE),
213 S3C2410_UDC_EP0_CSR_REG);
216 static inline void s3c2410_udc_set_ep0_de_in(void __iomem *base)
218 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
219 udc_writeb(base, (S3C2410_UDC_EP0_CSR_IPKRDY
220 | S3C2410_UDC_EP0_CSR_DE),
221 S3C2410_UDC_EP0_CSR_REG);
224 /*------------------------- I/O ----------------------------------*/
229 static void s3c2410_udc_done(struct s3c2410_ep *ep,
230 struct s3c2410_request *req, int status)
232 unsigned halted = ep->halted;
234 list_del_init(&req->queue);
236 if (likely(req->req.status == -EINPROGRESS))
237 req->req.status = status;
239 status = req->req.status;
242 usb_gadget_giveback_request(&ep->ep, &req->req);
246 static void s3c2410_udc_nuke(struct s3c2410_udc *udc,
247 struct s3c2410_ep *ep, int status)
249 while (!list_empty(&ep->queue)) {
250 struct s3c2410_request *req;
251 req = list_entry(ep->queue.next, struct s3c2410_request,
253 s3c2410_udc_done(ep, req, status);
257 static inline int s3c2410_udc_fifo_count_out(void)
261 tmp = udc_read(S3C2410_UDC_OUT_FIFO_CNT2_REG) << 8;
262 tmp |= udc_read(S3C2410_UDC_OUT_FIFO_CNT1_REG);
267 * s3c2410_udc_write_packet
269 static inline int s3c2410_udc_write_packet(int fifo,
270 struct s3c2410_request *req,
273 unsigned len = min(req->req.length - req->req.actual, max);
274 u8 *buf = req->req.buf + req->req.actual;
278 dprintk(DEBUG_VERBOSE, "%s %d %d %d %d\n", __func__,
279 req->req.actual, req->req.length, len, req->req.actual + len);
281 req->req.actual += len;
284 writesb(base_addr + fifo, buf, len);
289 * s3c2410_udc_write_fifo
291 * return: 0 = still running, 1 = completed, negative = errno
293 static int s3c2410_udc_write_fifo(struct s3c2410_ep *ep,
294 struct s3c2410_request *req)
302 idx = ep->bEndpointAddress & 0x7F;
308 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
311 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
314 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
317 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
320 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
324 count = s3c2410_udc_write_packet(fifo_reg, req, ep->ep.maxpacket);
326 /* last packet is often short (sometimes a zlp) */
327 if (count != ep->ep.maxpacket)
329 else if (req->req.length != req->req.actual || req->req.zero)
334 /* Only ep0 debug messages are interesting */
336 dprintk(DEBUG_NORMAL,
337 "Written ep%d %d.%d of %d b [last %d,z %d]\n",
338 idx, count, req->req.actual, req->req.length,
339 is_last, req->req.zero);
342 /* The order is important. It prevents sending 2 packets
343 * at the same time */
346 /* Reset signal => no need to say 'data sent' */
347 if (!(udc_read(S3C2410_UDC_USB_INT_REG)
348 & S3C2410_UDC_USBINT_RESET))
349 s3c2410_udc_set_ep0_de_in(base_addr);
350 ep->dev->ep0state = EP0_IDLE;
352 udc_write(idx, S3C2410_UDC_INDEX_REG);
353 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
354 udc_write(idx, S3C2410_UDC_INDEX_REG);
355 udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
356 S3C2410_UDC_IN_CSR1_REG);
359 s3c2410_udc_done(ep, req, 0);
363 /* Reset signal => no need to say 'data sent' */
364 if (!(udc_read(S3C2410_UDC_USB_INT_REG)
365 & S3C2410_UDC_USBINT_RESET))
366 s3c2410_udc_set_ep0_ipr(base_addr);
368 udc_write(idx, S3C2410_UDC_INDEX_REG);
369 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
370 udc_write(idx, S3C2410_UDC_INDEX_REG);
371 udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
372 S3C2410_UDC_IN_CSR1_REG);
379 static inline int s3c2410_udc_read_packet(int fifo, u8 *buf,
380 struct s3c2410_request *req, unsigned avail)
384 len = min(req->req.length - req->req.actual, avail);
385 req->req.actual += len;
387 readsb(fifo + base_addr, buf, len);
392 * return: 0 = still running, 1 = queue empty, negative = errno
394 static int s3c2410_udc_read_fifo(struct s3c2410_ep *ep,
395 struct s3c2410_request *req)
399 unsigned bufferspace;
406 idx = ep->bEndpointAddress & 0x7F;
413 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
416 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
419 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
422 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
425 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
429 if (!req->req.length)
432 buf = req->req.buf + req->req.actual;
433 bufferspace = req->req.length - req->req.actual;
435 dprintk(DEBUG_NORMAL, "%s: buffer full!\n", __func__);
439 udc_write(idx, S3C2410_UDC_INDEX_REG);
441 fifo_count = s3c2410_udc_fifo_count_out();
442 dprintk(DEBUG_NORMAL, "%s fifo count : %d\n", __func__, fifo_count);
444 if (fifo_count > ep->ep.maxpacket)
445 avail = ep->ep.maxpacket;
449 fifo_count = s3c2410_udc_read_packet(fifo_reg, buf, req, avail);
451 /* checking this with ep0 is not accurate as we already
452 * read a control request
454 if (idx != 0 && fifo_count < ep->ep.maxpacket) {
456 /* overflowed this request? flush extra data */
457 if (fifo_count != avail)
458 req->req.status = -EOVERFLOW;
460 is_last = (req->req.length <= req->req.actual) ? 1 : 0;
463 udc_write(idx, S3C2410_UDC_INDEX_REG);
464 fifo_count = s3c2410_udc_fifo_count_out();
466 /* Only ep0 debug messages are interesting */
468 dprintk(DEBUG_VERBOSE, "%s fifo count : %d [last %d]\n",
469 __func__, fifo_count, is_last);
473 s3c2410_udc_set_ep0_de_out(base_addr);
474 ep->dev->ep0state = EP0_IDLE;
476 udc_write(idx, S3C2410_UDC_INDEX_REG);
477 ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
478 udc_write(idx, S3C2410_UDC_INDEX_REG);
479 udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
480 S3C2410_UDC_OUT_CSR1_REG);
483 s3c2410_udc_done(ep, req, 0);
486 s3c2410_udc_clear_ep0_opr(base_addr);
488 udc_write(idx, S3C2410_UDC_INDEX_REG);
489 ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
490 udc_write(idx, S3C2410_UDC_INDEX_REG);
491 udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
492 S3C2410_UDC_OUT_CSR1_REG);
499 static int s3c2410_udc_read_fifo_crq(struct usb_ctrlrequest *crq)
501 unsigned char *outbuf = (unsigned char *)crq;
504 udc_write(0, S3C2410_UDC_INDEX_REG);
506 bytes_read = s3c2410_udc_fifo_count_out();
508 dprintk(DEBUG_NORMAL, "%s: fifo_count=%d\n", __func__, bytes_read);
510 if (bytes_read > sizeof(struct usb_ctrlrequest))
511 bytes_read = sizeof(struct usb_ctrlrequest);
513 readsb(S3C2410_UDC_EP0_FIFO_REG + base_addr, outbuf, bytes_read);
515 dprintk(DEBUG_VERBOSE, "%s: len=%d %02x:%02x {%x,%x,%x}\n", __func__,
516 bytes_read, crq->bRequest, crq->bRequestType,
517 crq->wValue, crq->wIndex, crq->wLength);
522 static int s3c2410_udc_get_status(struct s3c2410_udc *dev,
523 struct usb_ctrlrequest *crq)
526 u8 ep_num = crq->wIndex & 0x7F;
527 u8 is_in = crq->wIndex & USB_DIR_IN;
529 switch (crq->bRequestType & USB_RECIP_MASK) {
530 case USB_RECIP_INTERFACE:
533 case USB_RECIP_DEVICE:
534 status = dev->devstatus;
537 case USB_RECIP_ENDPOINT:
538 if (ep_num > 4 || crq->wLength > 2)
542 udc_write(0, S3C2410_UDC_INDEX_REG);
543 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
544 status = status & S3C2410_UDC_EP0_CSR_SENDSTL;
546 udc_write(ep_num, S3C2410_UDC_INDEX_REG);
548 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
549 status = status & S3C2410_UDC_ICSR1_SENDSTL;
551 status = udc_read(S3C2410_UDC_OUT_CSR1_REG);
552 status = status & S3C2410_UDC_OCSR1_SENDSTL;
556 status = status ? 1 : 0;
563 /* Seems to be needed to get it working. ouch :( */
565 udc_write(status & 0xFF, S3C2410_UDC_EP0_FIFO_REG);
566 udc_write(status >> 8, S3C2410_UDC_EP0_FIFO_REG);
567 s3c2410_udc_set_ep0_de_in(base_addr);
571 /*------------------------- usb state machine -------------------------------*/
572 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value);
574 static void s3c2410_udc_handle_ep0_idle(struct s3c2410_udc *dev,
575 struct s3c2410_ep *ep,
576 struct usb_ctrlrequest *crq,
581 /* start control request? */
582 if (!(ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY))
585 s3c2410_udc_nuke(dev, ep, -EPROTO);
587 len = s3c2410_udc_read_fifo_crq(crq);
588 if (len != sizeof(*crq)) {
589 dprintk(DEBUG_NORMAL, "setup begin: fifo READ ERROR"
590 " wanted %d bytes got %d. Stalling out...\n",
592 s3c2410_udc_set_ep0_ss(base_addr);
596 dprintk(DEBUG_NORMAL, "bRequest = %d bRequestType %d wLength = %d\n",
597 crq->bRequest, crq->bRequestType, crq->wLength);
599 /* cope with automagic for some standard requests. */
600 dev->req_std = (crq->bRequestType & USB_TYPE_MASK)
601 == USB_TYPE_STANDARD;
603 dev->req_pending = 1;
605 switch (crq->bRequest) {
606 case USB_REQ_SET_CONFIGURATION:
607 dprintk(DEBUG_NORMAL, "USB_REQ_SET_CONFIGURATION ...\n");
609 if (crq->bRequestType == USB_RECIP_DEVICE) {
611 s3c2410_udc_set_ep0_de_out(base_addr);
615 case USB_REQ_SET_INTERFACE:
616 dprintk(DEBUG_NORMAL, "USB_REQ_SET_INTERFACE ...\n");
618 if (crq->bRequestType == USB_RECIP_INTERFACE) {
620 s3c2410_udc_set_ep0_de_out(base_addr);
624 case USB_REQ_SET_ADDRESS:
625 dprintk(DEBUG_NORMAL, "USB_REQ_SET_ADDRESS ...\n");
627 if (crq->bRequestType == USB_RECIP_DEVICE) {
628 tmp = crq->wValue & 0x7F;
630 udc_write((tmp | S3C2410_UDC_FUNCADDR_UPDATE),
631 S3C2410_UDC_FUNC_ADDR_REG);
632 s3c2410_udc_set_ep0_de_out(base_addr);
637 case USB_REQ_GET_STATUS:
638 dprintk(DEBUG_NORMAL, "USB_REQ_GET_STATUS ...\n");
639 s3c2410_udc_clear_ep0_opr(base_addr);
642 if (!s3c2410_udc_get_status(dev, crq))
647 case USB_REQ_CLEAR_FEATURE:
648 s3c2410_udc_clear_ep0_opr(base_addr);
650 if (crq->bRequestType != USB_RECIP_ENDPOINT)
653 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
656 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 0);
657 s3c2410_udc_set_ep0_de_out(base_addr);
660 case USB_REQ_SET_FEATURE:
661 s3c2410_udc_clear_ep0_opr(base_addr);
663 if (crq->bRequestType != USB_RECIP_ENDPOINT)
666 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
669 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 1);
670 s3c2410_udc_set_ep0_de_out(base_addr);
674 s3c2410_udc_clear_ep0_opr(base_addr);
678 if (crq->bRequestType & USB_DIR_IN)
679 dev->ep0state = EP0_IN_DATA_PHASE;
681 dev->ep0state = EP0_OUT_DATA_PHASE;
686 /* deliver the request to the gadget driver */
687 ret = dev->driver->setup(&dev->gadget, crq);
689 if (dev->req_config) {
690 dprintk(DEBUG_NORMAL, "config change %02x fail %d?\n",
695 if (ret == -EOPNOTSUPP)
696 dprintk(DEBUG_NORMAL, "Operation not supported\n");
698 dprintk(DEBUG_NORMAL,
699 "dev->driver->setup failed. (%d)\n", ret);
702 s3c2410_udc_set_ep0_ss(base_addr);
703 s3c2410_udc_set_ep0_de_out(base_addr);
704 dev->ep0state = EP0_IDLE;
705 /* deferred i/o == no response yet */
706 } else if (dev->req_pending) {
707 dprintk(DEBUG_VERBOSE, "dev->req_pending... what now?\n");
708 dev->req_pending = 0;
711 dprintk(DEBUG_VERBOSE, "ep0state %s\n", ep0states[dev->ep0state]);
714 static void s3c2410_udc_handle_ep0(struct s3c2410_udc *dev)
717 struct s3c2410_ep *ep = &dev->ep[0];
718 struct s3c2410_request *req;
719 struct usb_ctrlrequest crq;
721 if (list_empty(&ep->queue))
724 req = list_entry(ep->queue.next, struct s3c2410_request, queue);
726 /* We make the assumption that S3C2410_UDC_IN_CSR1_REG equal to
727 * S3C2410_UDC_EP0_CSR_REG when index is zero */
729 udc_write(0, S3C2410_UDC_INDEX_REG);
730 ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
732 dprintk(DEBUG_NORMAL, "ep0csr %x ep0state %s\n",
733 ep0csr, ep0states[dev->ep0state]);
735 /* clear stall status */
736 if (ep0csr & S3C2410_UDC_EP0_CSR_SENTSTL) {
737 s3c2410_udc_nuke(dev, ep, -EPIPE);
738 dprintk(DEBUG_NORMAL, "... clear SENT_STALL ...\n");
739 s3c2410_udc_clear_ep0_sst(base_addr);
740 dev->ep0state = EP0_IDLE;
744 /* clear setup end */
745 if (ep0csr & S3C2410_UDC_EP0_CSR_SE) {
746 dprintk(DEBUG_NORMAL, "... serviced SETUP_END ...\n");
747 s3c2410_udc_nuke(dev, ep, 0);
748 s3c2410_udc_clear_ep0_se(base_addr);
749 dev->ep0state = EP0_IDLE;
752 switch (dev->ep0state) {
754 s3c2410_udc_handle_ep0_idle(dev, ep, &crq, ep0csr);
757 case EP0_IN_DATA_PHASE: /* GET_DESCRIPTOR etc */
758 dprintk(DEBUG_NORMAL, "EP0_IN_DATA_PHASE ... what now?\n");
759 if (!(ep0csr & S3C2410_UDC_EP0_CSR_IPKRDY) && req)
760 s3c2410_udc_write_fifo(ep, req);
763 case EP0_OUT_DATA_PHASE: /* SET_DESCRIPTOR etc */
764 dprintk(DEBUG_NORMAL, "EP0_OUT_DATA_PHASE ... what now?\n");
765 if ((ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY) && req)
766 s3c2410_udc_read_fifo(ep, req);
770 dprintk(DEBUG_NORMAL, "EP0_END_XFER ... what now?\n");
771 dev->ep0state = EP0_IDLE;
775 dprintk(DEBUG_NORMAL, "EP0_STALL ... what now?\n");
776 dev->ep0state = EP0_IDLE;
782 * handle_ep - Manage I/O endpoints
785 static void s3c2410_udc_handle_ep(struct s3c2410_ep *ep)
787 struct s3c2410_request *req;
788 int is_in = ep->bEndpointAddress & USB_DIR_IN;
792 if (likely(!list_empty(&ep->queue)))
793 req = list_entry(ep->queue.next,
794 struct s3c2410_request, queue);
798 idx = ep->bEndpointAddress & 0x7F;
801 udc_write(idx, S3C2410_UDC_INDEX_REG);
802 ep_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
803 dprintk(DEBUG_VERBOSE, "ep%01d write csr:%02x %d\n",
804 idx, ep_csr1, req ? 1 : 0);
806 if (ep_csr1 & S3C2410_UDC_ICSR1_SENTSTL) {
807 dprintk(DEBUG_VERBOSE, "st\n");
808 udc_write(idx, S3C2410_UDC_INDEX_REG);
809 udc_write(ep_csr1 & ~S3C2410_UDC_ICSR1_SENTSTL,
810 S3C2410_UDC_IN_CSR1_REG);
814 if (!(ep_csr1 & S3C2410_UDC_ICSR1_PKTRDY) && req)
815 s3c2410_udc_write_fifo(ep, req);
817 udc_write(idx, S3C2410_UDC_INDEX_REG);
818 ep_csr1 = udc_read(S3C2410_UDC_OUT_CSR1_REG);
819 dprintk(DEBUG_VERBOSE, "ep%01d rd csr:%02x\n", idx, ep_csr1);
821 if (ep_csr1 & S3C2410_UDC_OCSR1_SENTSTL) {
822 udc_write(idx, S3C2410_UDC_INDEX_REG);
823 udc_write(ep_csr1 & ~S3C2410_UDC_OCSR1_SENTSTL,
824 S3C2410_UDC_OUT_CSR1_REG);
828 if ((ep_csr1 & S3C2410_UDC_OCSR1_PKTRDY) && req)
829 s3c2410_udc_read_fifo(ep, req);
834 * s3c2410_udc_irq - interrupt handler
836 static irqreturn_t s3c2410_udc_irq(int dummy, void *_dev)
838 struct s3c2410_udc *dev = _dev;
847 spin_lock_irqsave(&dev->lock, flags);
849 /* Driver connected ? */
851 /* Clear interrupts */
852 udc_write(udc_read(S3C2410_UDC_USB_INT_REG),
853 S3C2410_UDC_USB_INT_REG);
854 udc_write(udc_read(S3C2410_UDC_EP_INT_REG),
855 S3C2410_UDC_EP_INT_REG);
859 idx = udc_read(S3C2410_UDC_INDEX_REG);
861 /* Read status registers */
862 usb_status = udc_read(S3C2410_UDC_USB_INT_REG);
863 usbd_status = udc_read(S3C2410_UDC_EP_INT_REG);
864 pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
866 udc_writeb(base_addr, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
867 ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
869 dprintk(DEBUG_NORMAL, "usbs=%02x, usbds=%02x, pwr=%02x ep0csr=%02x\n",
870 usb_status, usbd_status, pwr_reg, ep0csr);
873 * Now, handle interrupts. There's two types :
874 * - Reset, Resume, Suspend coming -> usb_int_reg
879 if (usb_status & S3C2410_UDC_USBINT_RESET) {
880 /* two kind of reset :
881 * - reset start -> pwr reg = 8
882 * - reset end -> pwr reg = 0
884 dprintk(DEBUG_NORMAL, "USB reset csr %x pwr %x\n",
887 dev->gadget.speed = USB_SPEED_UNKNOWN;
888 udc_write(0x00, S3C2410_UDC_INDEX_REG);
889 udc_write((dev->ep[0].ep.maxpacket & 0x7ff) >> 3,
890 S3C2410_UDC_MAXP_REG);
893 dev->ep0state = EP0_IDLE;
894 dev->gadget.speed = USB_SPEED_FULL;
896 /* clear interrupt */
897 udc_write(S3C2410_UDC_USBINT_RESET,
898 S3C2410_UDC_USB_INT_REG);
900 udc_write(idx, S3C2410_UDC_INDEX_REG);
901 spin_unlock_irqrestore(&dev->lock, flags);
906 if (usb_status & S3C2410_UDC_USBINT_RESUME) {
907 dprintk(DEBUG_NORMAL, "USB resume\n");
909 /* clear interrupt */
910 udc_write(S3C2410_UDC_USBINT_RESUME,
911 S3C2410_UDC_USB_INT_REG);
913 if (dev->gadget.speed != USB_SPEED_UNKNOWN
915 && dev->driver->resume)
916 dev->driver->resume(&dev->gadget);
920 if (usb_status & S3C2410_UDC_USBINT_SUSPEND) {
921 dprintk(DEBUG_NORMAL, "USB suspend\n");
923 /* clear interrupt */
924 udc_write(S3C2410_UDC_USBINT_SUSPEND,
925 S3C2410_UDC_USB_INT_REG);
927 if (dev->gadget.speed != USB_SPEED_UNKNOWN
929 && dev->driver->suspend)
930 dev->driver->suspend(&dev->gadget);
932 dev->ep0state = EP0_IDLE;
936 /* control traffic */
937 /* check on ep0csr != 0 is not a good idea as clearing in_pkt_ready
938 * generate an interrupt
940 if (usbd_status & S3C2410_UDC_INT_EP0) {
941 dprintk(DEBUG_VERBOSE, "USB ep0 irq\n");
942 /* Clear the interrupt bit by setting it to 1 */
943 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_REG);
944 s3c2410_udc_handle_ep0(dev);
947 /* endpoint data transfers */
948 for (i = 1; i < S3C2410_ENDPOINTS; i++) {
950 if (usbd_status & tmp) {
951 dprintk(DEBUG_VERBOSE, "USB ep%d irq\n", i);
953 /* Clear the interrupt bit by setting it to 1 */
954 udc_write(tmp, S3C2410_UDC_EP_INT_REG);
955 s3c2410_udc_handle_ep(&dev->ep[i]);
959 /* what else causes this interrupt? a receive! who is it? */
960 if (!usb_status && !usbd_status && !pwr_reg && !ep0csr) {
961 for (i = 1; i < S3C2410_ENDPOINTS; i++) {
962 idx2 = udc_read(S3C2410_UDC_INDEX_REG);
963 udc_write(i, S3C2410_UDC_INDEX_REG);
965 if (udc_read(S3C2410_UDC_OUT_CSR1_REG) & 0x1)
966 s3c2410_udc_handle_ep(&dev->ep[i]);
969 udc_write(idx2, S3C2410_UDC_INDEX_REG);
973 dprintk(DEBUG_VERBOSE, "irq: %d s3c2410_udc_done.\n", irq_usbd);
975 /* Restore old index */
976 udc_write(idx, S3C2410_UDC_INDEX_REG);
978 spin_unlock_irqrestore(&dev->lock, flags);
982 /*------------------------- s3c2410_ep_ops ----------------------------------*/
984 static inline struct s3c2410_ep *to_s3c2410_ep(struct usb_ep *ep)
986 return container_of(ep, struct s3c2410_ep, ep);
989 static inline struct s3c2410_udc *to_s3c2410_udc(struct usb_gadget *gadget)
991 return container_of(gadget, struct s3c2410_udc, gadget);
994 static inline struct s3c2410_request *to_s3c2410_req(struct usb_request *req)
996 return container_of(req, struct s3c2410_request, req);
1000 * s3c2410_udc_ep_enable
1002 static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
1003 const struct usb_endpoint_descriptor *desc)
1005 struct s3c2410_udc *dev;
1006 struct s3c2410_ep *ep;
1008 unsigned long flags;
1012 ep = to_s3c2410_ep(_ep);
1015 || _ep->name == ep0name
1016 || desc->bDescriptorType != USB_DT_ENDPOINT)
1020 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
1023 max = usb_endpoint_maxp(desc);
1025 local_irq_save(flags);
1026 _ep->maxpacket = max;
1029 ep->bEndpointAddress = desc->bEndpointAddress;
1031 /* set max packet */
1032 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1033 udc_write(max >> 3, S3C2410_UDC_MAXP_REG);
1035 /* set type, direction, address; reset fifo counters */
1036 if (desc->bEndpointAddress & USB_DIR_IN) {
1037 csr1 = S3C2410_UDC_ICSR1_FFLUSH|S3C2410_UDC_ICSR1_CLRDT;
1038 csr2 = S3C2410_UDC_ICSR2_MODEIN|S3C2410_UDC_ICSR2_DMAIEN;
1040 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1041 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1042 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1043 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1045 /* don't flush in fifo or it will cause endpoint interrupt */
1046 csr1 = S3C2410_UDC_ICSR1_CLRDT;
1047 csr2 = S3C2410_UDC_ICSR2_DMAIEN;
1049 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1050 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1051 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1052 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1054 csr1 = S3C2410_UDC_OCSR1_FFLUSH | S3C2410_UDC_OCSR1_CLRDT;
1055 csr2 = S3C2410_UDC_OCSR2_DMAIEN;
1057 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1058 udc_write(csr1, S3C2410_UDC_OUT_CSR1_REG);
1059 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1060 udc_write(csr2, S3C2410_UDC_OUT_CSR2_REG);
1064 int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1065 udc_write(int_en_reg | (1 << ep->num), S3C2410_UDC_EP_INT_EN_REG);
1067 /* print some debug message */
1068 tmp = desc->bEndpointAddress;
1069 dprintk(DEBUG_NORMAL, "enable %s(%d) ep%x%s-blk max %02x\n",
1070 _ep->name, ep->num, tmp,
1071 desc->bEndpointAddress & USB_DIR_IN ? "in" : "out", max);
1073 local_irq_restore(flags);
1074 s3c2410_udc_set_halt(_ep, 0);
1080 * s3c2410_udc_ep_disable
1082 static int s3c2410_udc_ep_disable(struct usb_ep *_ep)
1084 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1085 unsigned long flags;
1088 if (!_ep || !ep->ep.desc) {
1089 dprintk(DEBUG_NORMAL, "%s not enabled\n",
1090 _ep ? ep->ep.name : NULL);
1094 local_irq_save(flags);
1096 dprintk(DEBUG_NORMAL, "ep_disable: %s\n", _ep->name);
1101 s3c2410_udc_nuke(ep->dev, ep, -ESHUTDOWN);
1104 int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1105 udc_write(int_en_reg & ~(1<<ep->num), S3C2410_UDC_EP_INT_EN_REG);
1107 local_irq_restore(flags);
1109 dprintk(DEBUG_NORMAL, "%s disabled\n", _ep->name);
1115 * s3c2410_udc_alloc_request
1117 static struct usb_request *
1118 s3c2410_udc_alloc_request(struct usb_ep *_ep, gfp_t mem_flags)
1120 struct s3c2410_request *req;
1122 dprintk(DEBUG_VERBOSE, "%s(%p,%d)\n", __func__, _ep, mem_flags);
1127 req = kzalloc(sizeof(struct s3c2410_request), mem_flags);
1131 INIT_LIST_HEAD(&req->queue);
1136 * s3c2410_udc_free_request
1139 s3c2410_udc_free_request(struct usb_ep *_ep, struct usb_request *_req)
1141 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1142 struct s3c2410_request *req = to_s3c2410_req(_req);
1144 dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1146 if (!ep || !_req || (!ep->ep.desc && _ep->name != ep0name))
1149 WARN_ON(!list_empty(&req->queue));
1156 static int s3c2410_udc_queue(struct usb_ep *_ep, struct usb_request *_req,
1159 struct s3c2410_request *req = to_s3c2410_req(_req);
1160 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1161 struct s3c2410_udc *dev;
1164 unsigned long flags;
1166 if (unlikely(!_ep || (!ep->ep.desc && ep->ep.name != ep0name))) {
1167 dprintk(DEBUG_NORMAL, "%s: invalid args\n", __func__);
1172 if (unlikely(!dev->driver
1173 || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
1177 local_irq_save(flags);
1179 if (unlikely(!_req || !_req->complete
1180 || !_req->buf || !list_empty(&req->queue))) {
1182 dprintk(DEBUG_NORMAL, "%s: 1 X X X\n", __func__);
1184 dprintk(DEBUG_NORMAL, "%s: 0 %01d %01d %01d\n",
1185 __func__, !_req->complete, !_req->buf,
1186 !list_empty(&req->queue));
1189 local_irq_restore(flags);
1193 _req->status = -EINPROGRESS;
1196 dprintk(DEBUG_VERBOSE, "%s: ep%x len %d\n",
1197 __func__, ep->bEndpointAddress, _req->length);
1199 if (ep->bEndpointAddress) {
1200 udc_write(ep->bEndpointAddress & 0x7F, S3C2410_UDC_INDEX_REG);
1202 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1203 ? S3C2410_UDC_IN_CSR1_REG
1204 : S3C2410_UDC_OUT_CSR1_REG);
1205 fifo_count = s3c2410_udc_fifo_count_out();
1207 udc_write(0, S3C2410_UDC_INDEX_REG);
1208 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
1209 fifo_count = s3c2410_udc_fifo_count_out();
1212 /* kickstart this i/o queue? */
1213 if (list_empty(&ep->queue) && !ep->halted) {
1214 if (ep->bEndpointAddress == 0 /* ep0 */) {
1215 switch (dev->ep0state) {
1216 case EP0_IN_DATA_PHASE:
1217 if (!(ep_csr&S3C2410_UDC_EP0_CSR_IPKRDY)
1218 && s3c2410_udc_write_fifo(ep,
1220 dev->ep0state = EP0_IDLE;
1225 case EP0_OUT_DATA_PHASE:
1227 || ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1228 && s3c2410_udc_read_fifo(ep,
1230 dev->ep0state = EP0_IDLE;
1236 local_irq_restore(flags);
1239 } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0
1240 && (!(ep_csr&S3C2410_UDC_OCSR1_PKTRDY))
1241 && s3c2410_udc_write_fifo(ep, req)) {
1243 } else if ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1245 && s3c2410_udc_read_fifo(ep, req)) {
1250 /* pio or dma irq handler advances the queue. */
1252 list_add_tail(&req->queue, &ep->queue);
1254 local_irq_restore(flags);
1256 dprintk(DEBUG_VERBOSE, "%s ok\n", __func__);
1261 * s3c2410_udc_dequeue
1263 static int s3c2410_udc_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1265 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1266 int retval = -EINVAL;
1267 unsigned long flags;
1268 struct s3c2410_request *req = NULL;
1270 dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1272 if (!the_controller->driver)
1278 local_irq_save(flags);
1280 list_for_each_entry(req, &ep->queue, queue) {
1281 if (&req->req == _req) {
1282 list_del_init(&req->queue);
1283 _req->status = -ECONNRESET;
1290 dprintk(DEBUG_VERBOSE,
1291 "dequeued req %p from %s, len %d buf %p\n",
1292 req, _ep->name, _req->length, _req->buf);
1294 s3c2410_udc_done(ep, req, -ECONNRESET);
1297 local_irq_restore(flags);
1302 * s3c2410_udc_set_halt
1304 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value)
1306 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1308 unsigned long flags;
1311 if (unlikely(!_ep || (!ep->ep.desc && ep->ep.name != ep0name))) {
1312 dprintk(DEBUG_NORMAL, "%s: inval 2\n", __func__);
1316 local_irq_save(flags);
1318 idx = ep->bEndpointAddress & 0x7F;
1321 s3c2410_udc_set_ep0_ss(base_addr);
1322 s3c2410_udc_set_ep0_de_out(base_addr);
1324 udc_write(idx, S3C2410_UDC_INDEX_REG);
1325 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1326 ? S3C2410_UDC_IN_CSR1_REG
1327 : S3C2410_UDC_OUT_CSR1_REG);
1329 if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
1331 udc_write(ep_csr | S3C2410_UDC_ICSR1_SENDSTL,
1332 S3C2410_UDC_IN_CSR1_REG);
1334 ep_csr &= ~S3C2410_UDC_ICSR1_SENDSTL;
1335 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1336 ep_csr |= S3C2410_UDC_ICSR1_CLRDT;
1337 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1341 udc_write(ep_csr | S3C2410_UDC_OCSR1_SENDSTL,
1342 S3C2410_UDC_OUT_CSR1_REG);
1344 ep_csr &= ~S3C2410_UDC_OCSR1_SENDSTL;
1345 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1346 ep_csr |= S3C2410_UDC_OCSR1_CLRDT;
1347 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1352 ep->halted = value ? 1 : 0;
1353 local_irq_restore(flags);
1358 static const struct usb_ep_ops s3c2410_ep_ops = {
1359 .enable = s3c2410_udc_ep_enable,
1360 .disable = s3c2410_udc_ep_disable,
1362 .alloc_request = s3c2410_udc_alloc_request,
1363 .free_request = s3c2410_udc_free_request,
1365 .queue = s3c2410_udc_queue,
1366 .dequeue = s3c2410_udc_dequeue,
1368 .set_halt = s3c2410_udc_set_halt,
1371 /*------------------------- usb_gadget_ops ----------------------------------*/
1374 * s3c2410_udc_get_frame
1376 static int s3c2410_udc_get_frame(struct usb_gadget *_gadget)
1380 dprintk(DEBUG_VERBOSE, "%s()\n", __func__);
1382 tmp = udc_read(S3C2410_UDC_FRAME_NUM2_REG) << 8;
1383 tmp |= udc_read(S3C2410_UDC_FRAME_NUM1_REG);
1388 * s3c2410_udc_wakeup
1390 static int s3c2410_udc_wakeup(struct usb_gadget *_gadget)
1392 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1397 * s3c2410_udc_set_selfpowered
1399 static int s3c2410_udc_set_selfpowered(struct usb_gadget *gadget, int value)
1401 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1403 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1405 gadget->is_selfpowered = (value != 0);
1407 udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
1409 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
1414 static void s3c2410_udc_disable(struct s3c2410_udc *dev);
1415 static void s3c2410_udc_enable(struct s3c2410_udc *dev);
1417 static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on)
1419 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1421 if (udc_info && (udc_info->udc_command ||
1422 gpio_is_valid(udc_info->pullup_pin))) {
1425 s3c2410_udc_enable(udc);
1427 if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
1428 if (udc->driver && udc->driver->disconnect)
1429 udc->driver->disconnect(&udc->gadget);
1432 s3c2410_udc_disable(udc);
1441 static int s3c2410_udc_vbus_session(struct usb_gadget *gadget, int is_active)
1443 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1445 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1447 udc->vbus = (is_active != 0);
1448 s3c2410_udc_set_pullup(udc, is_active);
1452 static int s3c2410_udc_pullup(struct usb_gadget *gadget, int is_on)
1454 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1456 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1458 s3c2410_udc_set_pullup(udc, is_on);
1462 static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev)
1464 struct s3c2410_udc *dev = _dev;
1467 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1469 value = gpio_get_value(udc_info->vbus_pin) ? 1 : 0;
1470 if (udc_info->vbus_pin_inverted)
1473 if (value != dev->vbus)
1474 s3c2410_udc_vbus_session(&dev->gadget, value);
1479 static int s3c2410_vbus_draw(struct usb_gadget *_gadget, unsigned ma)
1481 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1483 if (udc_info && udc_info->vbus_draw) {
1484 udc_info->vbus_draw(ma);
1491 static int s3c2410_udc_start(struct usb_gadget *g,
1492 struct usb_gadget_driver *driver);
1493 static int s3c2410_udc_stop(struct usb_gadget *g);
1495 static const struct usb_gadget_ops s3c2410_ops = {
1496 .get_frame = s3c2410_udc_get_frame,
1497 .wakeup = s3c2410_udc_wakeup,
1498 .set_selfpowered = s3c2410_udc_set_selfpowered,
1499 .pullup = s3c2410_udc_pullup,
1500 .vbus_session = s3c2410_udc_vbus_session,
1501 .vbus_draw = s3c2410_vbus_draw,
1502 .udc_start = s3c2410_udc_start,
1503 .udc_stop = s3c2410_udc_stop,
1506 static void s3c2410_udc_command(enum s3c2410_udc_cmd_e cmd)
1511 if (udc_info->udc_command) {
1512 udc_info->udc_command(cmd);
1513 } else if (gpio_is_valid(udc_info->pullup_pin)) {
1517 case S3C2410_UDC_P_ENABLE:
1520 case S3C2410_UDC_P_DISABLE:
1526 value ^= udc_info->pullup_pin_inverted;
1528 gpio_set_value(udc_info->pullup_pin, value);
1532 /*------------------------- gadget driver handling---------------------------*/
1534 * s3c2410_udc_disable
1536 static void s3c2410_udc_disable(struct s3c2410_udc *dev)
1538 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1540 /* Disable all interrupts */
1541 udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG);
1542 udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG);
1544 /* Clear the interrupt registers */
1545 udc_write(S3C2410_UDC_USBINT_RESET
1546 | S3C2410_UDC_USBINT_RESUME
1547 | S3C2410_UDC_USBINT_SUSPEND,
1548 S3C2410_UDC_USB_INT_REG);
1550 udc_write(0x1F, S3C2410_UDC_EP_INT_REG);
1552 /* Good bye, cruel world */
1553 s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
1555 /* Set speed to unknown */
1556 dev->gadget.speed = USB_SPEED_UNKNOWN;
1560 * s3c2410_udc_reinit
1562 static void s3c2410_udc_reinit(struct s3c2410_udc *dev)
1566 /* device/ep0 records init */
1567 INIT_LIST_HEAD(&dev->gadget.ep_list);
1568 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
1569 dev->ep0state = EP0_IDLE;
1571 for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1572 struct s3c2410_ep *ep = &dev->ep[i];
1575 list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
1580 INIT_LIST_HEAD(&ep->queue);
1581 usb_ep_set_maxpacket_limit(&ep->ep, ep->ep.maxpacket);
1586 * s3c2410_udc_enable
1588 static void s3c2410_udc_enable(struct s3c2410_udc *dev)
1592 dprintk(DEBUG_NORMAL, "s3c2410_udc_enable called\n");
1594 /* dev->gadget.speed = USB_SPEED_UNKNOWN; */
1595 dev->gadget.speed = USB_SPEED_FULL;
1597 /* Set MAXP for all endpoints */
1598 for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1599 udc_write(i, S3C2410_UDC_INDEX_REG);
1600 udc_write((dev->ep[i].ep.maxpacket & 0x7ff) >> 3,
1601 S3C2410_UDC_MAXP_REG);
1604 /* Set default power state */
1605 udc_write(DEFAULT_POWER_STATE, S3C2410_UDC_PWR_REG);
1607 /* Enable reset and suspend interrupt interrupts */
1608 udc_write(S3C2410_UDC_USBINT_RESET | S3C2410_UDC_USBINT_SUSPEND,
1609 S3C2410_UDC_USB_INT_EN_REG);
1611 /* Enable ep0 interrupt */
1612 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG);
1614 /* time to say "hello, world" */
1615 s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
1618 static int s3c2410_udc_start(struct usb_gadget *g,
1619 struct usb_gadget_driver *driver)
1621 struct s3c2410_udc *udc = to_s3c2410(g);
1623 dprintk(DEBUG_NORMAL, "%s() '%s'\n", __func__, driver->driver.name);
1625 /* Hook the driver */
1626 udc->driver = driver;
1629 s3c2410_udc_enable(udc);
1634 static int s3c2410_udc_stop(struct usb_gadget *g)
1636 struct s3c2410_udc *udc = to_s3c2410(g);
1641 s3c2410_udc_disable(udc);
1646 /*---------------------------------------------------------------------------*/
1647 static struct s3c2410_udc memory = {
1649 .ops = &s3c2410_ops,
1650 .ep0 = &memory.ep[0].ep,
1651 .name = gadget_name,
1653 .init_name = "gadget",
1657 /* control endpoint */
1662 .ops = &s3c2410_ep_ops,
1663 .maxpacket = EP0_FIFO_SIZE,
1664 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL,
1665 USB_EP_CAPS_DIR_ALL),
1670 /* first group of endpoints */
1675 .ops = &s3c2410_ep_ops,
1676 .maxpacket = EP_FIFO_SIZE,
1677 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1678 USB_EP_CAPS_DIR_ALL),
1681 .fifo_size = EP_FIFO_SIZE,
1682 .bEndpointAddress = 1,
1683 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1689 .ops = &s3c2410_ep_ops,
1690 .maxpacket = EP_FIFO_SIZE,
1691 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1692 USB_EP_CAPS_DIR_ALL),
1695 .fifo_size = EP_FIFO_SIZE,
1696 .bEndpointAddress = 2,
1697 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1703 .ops = &s3c2410_ep_ops,
1704 .maxpacket = EP_FIFO_SIZE,
1705 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1706 USB_EP_CAPS_DIR_ALL),
1709 .fifo_size = EP_FIFO_SIZE,
1710 .bEndpointAddress = 3,
1711 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1717 .ops = &s3c2410_ep_ops,
1718 .maxpacket = EP_FIFO_SIZE,
1719 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1720 USB_EP_CAPS_DIR_ALL),
1723 .fifo_size = EP_FIFO_SIZE,
1724 .bEndpointAddress = 4,
1725 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1731 * probe - binds to the platform device
1733 static int s3c2410_udc_probe(struct platform_device *pdev)
1735 struct s3c2410_udc *udc = &memory;
1736 struct device *dev = &pdev->dev;
1740 dev_dbg(dev, "%s()\n", __func__);
1742 usb_bus_clock = clk_get(NULL, "usb-bus-gadget");
1743 if (IS_ERR(usb_bus_clock)) {
1744 dev_err(dev, "failed to get usb bus clock source\n");
1745 return PTR_ERR(usb_bus_clock);
1748 clk_prepare_enable(usb_bus_clock);
1750 udc_clock = clk_get(NULL, "usb-device");
1751 if (IS_ERR(udc_clock)) {
1752 dev_err(dev, "failed to get udc clock source\n");
1753 retval = PTR_ERR(udc_clock);
1754 goto err_usb_bus_clk;
1757 clk_prepare_enable(udc_clock);
1761 dev_dbg(dev, "got and enabled clocks\n");
1763 if (strncmp(pdev->name, "s3c2440", 7) == 0) {
1764 dev_info(dev, "S3C2440: increasing FIFO to 128 bytes\n");
1765 memory.ep[1].fifo_size = S3C2440_EP_FIFO_SIZE;
1766 memory.ep[2].fifo_size = S3C2440_EP_FIFO_SIZE;
1767 memory.ep[3].fifo_size = S3C2440_EP_FIFO_SIZE;
1768 memory.ep[4].fifo_size = S3C2440_EP_FIFO_SIZE;
1771 spin_lock_init(&udc->lock);
1772 udc_info = dev_get_platdata(&pdev->dev);
1774 base_addr = devm_platform_ioremap_resource(pdev, 0);
1775 if (IS_ERR(base_addr)) {
1776 retval = PTR_ERR(base_addr);
1780 the_controller = udc;
1781 platform_set_drvdata(pdev, udc);
1783 s3c2410_udc_disable(udc);
1784 s3c2410_udc_reinit(udc);
1786 irq_usbd = platform_get_irq(pdev, 0);
1792 /* irq setup after old hardware state is cleaned up */
1793 retval = request_irq(irq_usbd, s3c2410_udc_irq,
1794 0, gadget_name, udc);
1797 dev_err(dev, "cannot get irq %i, err %d\n", irq_usbd, retval);
1802 dev_dbg(dev, "got irq %i\n", irq_usbd);
1804 if (udc_info && udc_info->vbus_pin > 0) {
1805 retval = gpio_request(udc_info->vbus_pin, "udc vbus");
1807 dev_err(dev, "cannot claim vbus pin\n");
1811 irq = gpio_to_irq(udc_info->vbus_pin);
1813 dev_err(dev, "no irq for gpio vbus pin\n");
1815 goto err_gpio_claim;
1818 retval = request_irq(irq, s3c2410_udc_vbus_irq,
1820 | IRQF_TRIGGER_FALLING | IRQF_SHARED,
1824 dev_err(dev, "can't get vbus irq %d, err %d\n",
1827 goto err_gpio_claim;
1830 dev_dbg(dev, "got irq %i\n", irq);
1835 if (udc_info && !udc_info->udc_command &&
1836 gpio_is_valid(udc_info->pullup_pin)) {
1838 retval = gpio_request_one(udc_info->pullup_pin,
1839 udc_info->vbus_pin_inverted ?
1840 GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
1846 retval = usb_add_gadget_udc(&pdev->dev, &udc->gadget);
1850 debugfs_create_file("registers", S_IRUGO, s3c2410_udc_debugfs_root, udc,
1851 &s3c2410_udc_debugfs_fops);
1853 dev_dbg(dev, "probe ok\n");
1858 if (udc_info && !udc_info->udc_command &&
1859 gpio_is_valid(udc_info->pullup_pin))
1860 gpio_free(udc_info->pullup_pin);
1862 if (udc_info && udc_info->vbus_pin > 0)
1863 free_irq(gpio_to_irq(udc_info->vbus_pin), udc);
1865 if (udc_info && udc_info->vbus_pin > 0)
1866 gpio_free(udc_info->vbus_pin);
1868 free_irq(irq_usbd, udc);
1870 clk_disable_unprepare(udc_clock);
1874 clk_disable_unprepare(usb_bus_clock);
1875 clk_put(usb_bus_clock);
1876 usb_bus_clock = NULL;
1882 * s3c2410_udc_remove
1884 static int s3c2410_udc_remove(struct platform_device *pdev)
1886 struct s3c2410_udc *udc = platform_get_drvdata(pdev);
1889 dev_dbg(&pdev->dev, "%s()\n", __func__);
1894 usb_del_gadget_udc(&udc->gadget);
1895 debugfs_remove(debugfs_lookup("registers", s3c2410_udc_debugfs_root));
1897 if (udc_info && !udc_info->udc_command &&
1898 gpio_is_valid(udc_info->pullup_pin))
1899 gpio_free(udc_info->pullup_pin);
1901 if (udc_info && udc_info->vbus_pin > 0) {
1902 irq = gpio_to_irq(udc_info->vbus_pin);
1906 free_irq(irq_usbd, udc);
1908 if (!IS_ERR(udc_clock) && udc_clock != NULL) {
1909 clk_disable_unprepare(udc_clock);
1914 if (!IS_ERR(usb_bus_clock) && usb_bus_clock != NULL) {
1915 clk_disable_unprepare(usb_bus_clock);
1916 clk_put(usb_bus_clock);
1917 usb_bus_clock = NULL;
1920 dev_dbg(&pdev->dev, "%s: remove ok\n", __func__);
1926 s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message)
1928 s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
1933 static int s3c2410_udc_resume(struct platform_device *pdev)
1935 s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
1940 #define s3c2410_udc_suspend NULL
1941 #define s3c2410_udc_resume NULL
1944 static const struct platform_device_id s3c_udc_ids[] = {
1945 { "s3c2410-usbgadget", },
1946 { "s3c2440-usbgadget", },
1949 MODULE_DEVICE_TABLE(platform, s3c_udc_ids);
1951 static struct platform_driver udc_driver_24x0 = {
1953 .name = "s3c24x0-usbgadget",
1955 .probe = s3c2410_udc_probe,
1956 .remove = s3c2410_udc_remove,
1957 .suspend = s3c2410_udc_suspend,
1958 .resume = s3c2410_udc_resume,
1959 .id_table = s3c_udc_ids,
1962 static int __init udc_init(void)
1966 dprintk(DEBUG_NORMAL, "%s\n", gadget_name);
1968 s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name,
1971 retval = platform_driver_register(&udc_driver_24x0);
1978 debugfs_remove(s3c2410_udc_debugfs_root);
1982 static void __exit udc_exit(void)
1984 platform_driver_unregister(&udc_driver_24x0);
1985 debugfs_remove_recursive(s3c2410_udc_debugfs_root);
1988 module_init(udc_init);
1989 module_exit(udc_exit);
1991 MODULE_AUTHOR(DRIVER_AUTHOR);
1992 MODULE_DESCRIPTION(DRIVER_DESC);
1993 MODULE_LICENSE("GPL");