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>
32 #include <linux/debugfs.h>
33 #include <linux/seq_file.h>
35 #include <linux/usb.h>
36 #include <linux/usb/gadget.h>
38 #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);
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->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);
1152 s3c2410_udc_nuke (ep->dev, ep, -ESHUTDOWN);
1155 int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1156 udc_write(int_en_reg & ~(1<<ep->num), S3C2410_UDC_EP_INT_EN_REG);
1158 local_irq_restore(flags);
1160 dprintk(DEBUG_NORMAL, "%s disabled\n", _ep->name);
1166 * s3c2410_udc_alloc_request
1168 static struct usb_request *
1169 s3c2410_udc_alloc_request(struct usb_ep *_ep, gfp_t mem_flags)
1171 struct s3c2410_request *req;
1173 dprintk(DEBUG_VERBOSE,"%s(%p,%d)\n", __func__, _ep, mem_flags);
1178 req = kzalloc (sizeof(struct s3c2410_request), mem_flags);
1182 INIT_LIST_HEAD (&req->queue);
1187 * s3c2410_udc_free_request
1190 s3c2410_udc_free_request(struct usb_ep *_ep, struct usb_request *_req)
1192 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1193 struct s3c2410_request *req = to_s3c2410_req(_req);
1195 dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1197 if (!ep || !_req || (!ep->ep.desc && _ep->name != ep0name))
1200 WARN_ON (!list_empty (&req->queue));
1207 static int s3c2410_udc_queue(struct usb_ep *_ep, struct usb_request *_req,
1210 struct s3c2410_request *req = to_s3c2410_req(_req);
1211 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1212 struct s3c2410_udc *dev;
1215 unsigned long flags;
1217 if (unlikely(!_ep || (!ep->ep.desc && ep->ep.name != ep0name))) {
1218 dprintk(DEBUG_NORMAL, "%s: invalid args\n", __func__);
1223 if (unlikely (!dev->driver
1224 || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
1228 local_irq_save (flags);
1230 if (unlikely(!_req || !_req->complete
1231 || !_req->buf || !list_empty(&req->queue))) {
1233 dprintk(DEBUG_NORMAL, "%s: 1 X X X\n", __func__);
1235 dprintk(DEBUG_NORMAL, "%s: 0 %01d %01d %01d\n",
1236 __func__, !_req->complete,!_req->buf,
1237 !list_empty(&req->queue));
1240 local_irq_restore(flags);
1244 _req->status = -EINPROGRESS;
1247 dprintk(DEBUG_VERBOSE, "%s: ep%x len %d\n",
1248 __func__, ep->bEndpointAddress, _req->length);
1250 if (ep->bEndpointAddress) {
1251 udc_write(ep->bEndpointAddress & 0x7F, S3C2410_UDC_INDEX_REG);
1253 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1254 ? S3C2410_UDC_IN_CSR1_REG
1255 : S3C2410_UDC_OUT_CSR1_REG);
1256 fifo_count = s3c2410_udc_fifo_count_out();
1258 udc_write(0, S3C2410_UDC_INDEX_REG);
1259 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
1260 fifo_count = s3c2410_udc_fifo_count_out();
1263 /* kickstart this i/o queue? */
1264 if (list_empty(&ep->queue) && !ep->halted) {
1265 if (ep->bEndpointAddress == 0 /* ep0 */) {
1266 switch (dev->ep0state) {
1267 case EP0_IN_DATA_PHASE:
1268 if (!(ep_csr&S3C2410_UDC_EP0_CSR_IPKRDY)
1269 && s3c2410_udc_write_fifo(ep,
1271 dev->ep0state = EP0_IDLE;
1276 case EP0_OUT_DATA_PHASE:
1278 || ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1279 && s3c2410_udc_read_fifo(ep,
1281 dev->ep0state = EP0_IDLE;
1287 local_irq_restore(flags);
1290 } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0
1291 && (!(ep_csr&S3C2410_UDC_OCSR1_PKTRDY))
1292 && s3c2410_udc_write_fifo(ep, req)) {
1294 } else if ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1296 && s3c2410_udc_read_fifo(ep, req)) {
1301 /* pio or dma irq handler advances the queue. */
1302 if (likely (req != 0))
1303 list_add_tail(&req->queue, &ep->queue);
1305 local_irq_restore(flags);
1307 dprintk(DEBUG_VERBOSE, "%s ok\n", __func__);
1312 * s3c2410_udc_dequeue
1314 static int s3c2410_udc_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1316 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1317 struct s3c2410_udc *udc;
1318 int retval = -EINVAL;
1319 unsigned long flags;
1320 struct s3c2410_request *req = NULL;
1322 dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1324 if (!the_controller->driver)
1330 udc = to_s3c2410_udc(ep->gadget);
1332 local_irq_save (flags);
1334 list_for_each_entry (req, &ep->queue, queue) {
1335 if (&req->req == _req) {
1336 list_del_init (&req->queue);
1337 _req->status = -ECONNRESET;
1344 dprintk(DEBUG_VERBOSE,
1345 "dequeued req %p from %s, len %d buf %p\n",
1346 req, _ep->name, _req->length, _req->buf);
1348 s3c2410_udc_done(ep, req, -ECONNRESET);
1351 local_irq_restore (flags);
1356 * s3c2410_udc_set_halt
1358 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value)
1360 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1362 unsigned long flags;
1365 if (unlikely(!_ep || (!ep->ep.desc && ep->ep.name != ep0name))) {
1366 dprintk(DEBUG_NORMAL, "%s: inval 2\n", __func__);
1370 local_irq_save (flags);
1372 idx = ep->bEndpointAddress & 0x7F;
1375 s3c2410_udc_set_ep0_ss(base_addr);
1376 s3c2410_udc_set_ep0_de_out(base_addr);
1378 udc_write(idx, S3C2410_UDC_INDEX_REG);
1379 ep_csr = udc_read((ep->bEndpointAddress &USB_DIR_IN)
1380 ? S3C2410_UDC_IN_CSR1_REG
1381 : S3C2410_UDC_OUT_CSR1_REG);
1383 if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
1385 udc_write(ep_csr | S3C2410_UDC_ICSR1_SENDSTL,
1386 S3C2410_UDC_IN_CSR1_REG);
1388 ep_csr &= ~S3C2410_UDC_ICSR1_SENDSTL;
1389 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1390 ep_csr |= S3C2410_UDC_ICSR1_CLRDT;
1391 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1395 udc_write(ep_csr | S3C2410_UDC_OCSR1_SENDSTL,
1396 S3C2410_UDC_OUT_CSR1_REG);
1398 ep_csr &= ~S3C2410_UDC_OCSR1_SENDSTL;
1399 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1400 ep_csr |= S3C2410_UDC_OCSR1_CLRDT;
1401 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1406 ep->halted = value ? 1 : 0;
1407 local_irq_restore (flags);
1412 static const struct usb_ep_ops s3c2410_ep_ops = {
1413 .enable = s3c2410_udc_ep_enable,
1414 .disable = s3c2410_udc_ep_disable,
1416 .alloc_request = s3c2410_udc_alloc_request,
1417 .free_request = s3c2410_udc_free_request,
1419 .queue = s3c2410_udc_queue,
1420 .dequeue = s3c2410_udc_dequeue,
1422 .set_halt = s3c2410_udc_set_halt,
1425 /*------------------------- usb_gadget_ops ----------------------------------*/
1428 * s3c2410_udc_get_frame
1430 static int s3c2410_udc_get_frame(struct usb_gadget *_gadget)
1434 dprintk(DEBUG_VERBOSE, "%s()\n", __func__);
1436 tmp = udc_read(S3C2410_UDC_FRAME_NUM2_REG) << 8;
1437 tmp |= udc_read(S3C2410_UDC_FRAME_NUM1_REG);
1442 * s3c2410_udc_wakeup
1444 static int s3c2410_udc_wakeup(struct usb_gadget *_gadget)
1446 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1451 * s3c2410_udc_set_selfpowered
1453 static int s3c2410_udc_set_selfpowered(struct usb_gadget *gadget, int value)
1455 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1457 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1460 udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
1462 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
1467 static void s3c2410_udc_disable(struct s3c2410_udc *dev);
1468 static void s3c2410_udc_enable(struct s3c2410_udc *dev);
1470 static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on)
1472 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1474 if (udc_info && (udc_info->udc_command ||
1475 gpio_is_valid(udc_info->pullup_pin))) {
1478 s3c2410_udc_enable(udc);
1480 if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
1481 if (udc->driver && udc->driver->disconnect)
1482 udc->driver->disconnect(&udc->gadget);
1485 s3c2410_udc_disable(udc);
1494 static int s3c2410_udc_vbus_session(struct usb_gadget *gadget, int is_active)
1496 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1498 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1500 udc->vbus = (is_active != 0);
1501 s3c2410_udc_set_pullup(udc, is_active);
1505 static int s3c2410_udc_pullup(struct usb_gadget *gadget, int is_on)
1507 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1509 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1511 s3c2410_udc_set_pullup(udc, is_on ? 0 : 1);
1515 static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev)
1517 struct s3c2410_udc *dev = _dev;
1520 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1522 value = gpio_get_value(udc_info->vbus_pin) ? 1 : 0;
1523 if (udc_info->vbus_pin_inverted)
1526 if (value != dev->vbus)
1527 s3c2410_udc_vbus_session(&dev->gadget, value);
1532 static int s3c2410_vbus_draw(struct usb_gadget *_gadget, unsigned ma)
1534 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1536 if (udc_info && udc_info->vbus_draw) {
1537 udc_info->vbus_draw(ma);
1544 static int s3c2410_udc_start(struct usb_gadget_driver *driver,
1545 int (*bind)(struct usb_gadget *));
1546 static int s3c2410_udc_stop(struct usb_gadget_driver *driver);
1548 static const struct usb_gadget_ops s3c2410_ops = {
1549 .get_frame = s3c2410_udc_get_frame,
1550 .wakeup = s3c2410_udc_wakeup,
1551 .set_selfpowered = s3c2410_udc_set_selfpowered,
1552 .pullup = s3c2410_udc_pullup,
1553 .vbus_session = s3c2410_udc_vbus_session,
1554 .vbus_draw = s3c2410_vbus_draw,
1555 .start = s3c2410_udc_start,
1556 .stop = s3c2410_udc_stop,
1559 static void s3c2410_udc_command(enum s3c2410_udc_cmd_e cmd)
1564 if (udc_info->udc_command) {
1565 udc_info->udc_command(cmd);
1566 } else if (gpio_is_valid(udc_info->pullup_pin)) {
1570 case S3C2410_UDC_P_ENABLE:
1573 case S3C2410_UDC_P_DISABLE:
1579 value ^= udc_info->pullup_pin_inverted;
1581 gpio_set_value(udc_info->pullup_pin, value);
1585 /*------------------------- gadget driver handling---------------------------*/
1587 * s3c2410_udc_disable
1589 static void s3c2410_udc_disable(struct s3c2410_udc *dev)
1591 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1593 /* Disable all interrupts */
1594 udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG);
1595 udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG);
1597 /* Clear the interrupt registers */
1598 udc_write(S3C2410_UDC_USBINT_RESET
1599 | S3C2410_UDC_USBINT_RESUME
1600 | S3C2410_UDC_USBINT_SUSPEND,
1601 S3C2410_UDC_USB_INT_REG);
1603 udc_write(0x1F, S3C2410_UDC_EP_INT_REG);
1605 /* Good bye, cruel world */
1606 s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
1608 /* Set speed to unknown */
1609 dev->gadget.speed = USB_SPEED_UNKNOWN;
1613 * s3c2410_udc_reinit
1615 static void s3c2410_udc_reinit(struct s3c2410_udc *dev)
1619 /* device/ep0 records init */
1620 INIT_LIST_HEAD (&dev->gadget.ep_list);
1621 INIT_LIST_HEAD (&dev->gadget.ep0->ep_list);
1622 dev->ep0state = EP0_IDLE;
1624 for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1625 struct s3c2410_ep *ep = &dev->ep[i];
1628 list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
1633 INIT_LIST_HEAD (&ep->queue);
1638 * s3c2410_udc_enable
1640 static void s3c2410_udc_enable(struct s3c2410_udc *dev)
1644 dprintk(DEBUG_NORMAL, "s3c2410_udc_enable called\n");
1646 /* dev->gadget.speed = USB_SPEED_UNKNOWN; */
1647 dev->gadget.speed = USB_SPEED_FULL;
1649 /* Set MAXP for all endpoints */
1650 for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1651 udc_write(i, S3C2410_UDC_INDEX_REG);
1652 udc_write((dev->ep[i].ep.maxpacket & 0x7ff) >> 3,
1653 S3C2410_UDC_MAXP_REG);
1656 /* Set default power state */
1657 udc_write(DEFAULT_POWER_STATE, S3C2410_UDC_PWR_REG);
1659 /* Enable reset and suspend interrupt interrupts */
1660 udc_write(S3C2410_UDC_USBINT_RESET | S3C2410_UDC_USBINT_SUSPEND,
1661 S3C2410_UDC_USB_INT_EN_REG);
1663 /* Enable ep0 interrupt */
1664 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG);
1666 /* time to say "hello, world" */
1667 s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
1670 static int s3c2410_udc_start(struct usb_gadget_driver *driver,
1671 int (*bind)(struct usb_gadget *))
1673 struct s3c2410_udc *udc = the_controller;
1676 dprintk(DEBUG_NORMAL, "%s() '%s'\n", __func__, driver->driver.name);
1685 if (!bind || !driver->setup || driver->max_speed < USB_SPEED_FULL) {
1686 printk(KERN_ERR "Invalid driver: bind %p setup %p speed %d\n",
1687 bind, driver->setup, driver->max_speed);
1691 if (!driver->unbind) {
1692 printk(KERN_ERR "Invalid driver: no unbind method\n");
1697 /* Hook the driver */
1698 udc->driver = driver;
1699 udc->gadget.dev.driver = &driver->driver;
1701 /* Bind the driver */
1702 if ((retval = device_add(&udc->gadget.dev)) != 0) {
1703 printk(KERN_ERR "Error in device_add() : %d\n",retval);
1704 goto register_error;
1707 dprintk(DEBUG_NORMAL, "binding gadget driver '%s'\n",
1708 driver->driver.name);
1710 if ((retval = bind(&udc->gadget)) != 0) {
1711 device_del(&udc->gadget.dev);
1712 goto register_error;
1716 s3c2410_udc_enable(udc);
1722 udc->gadget.dev.driver = NULL;
1726 static int s3c2410_udc_stop(struct usb_gadget_driver *driver)
1728 struct s3c2410_udc *udc = the_controller;
1733 if (!driver || driver != udc->driver || !driver->unbind)
1736 dprintk(DEBUG_NORMAL, "usb_gadget_unregister_driver() '%s'\n",
1737 driver->driver.name);
1739 /* report disconnect */
1740 if (driver->disconnect)
1741 driver->disconnect(&udc->gadget);
1743 driver->unbind(&udc->gadget);
1745 device_del(&udc->gadget.dev);
1749 s3c2410_udc_disable(udc);
1754 /*---------------------------------------------------------------------------*/
1755 static struct s3c2410_udc memory = {
1757 .ops = &s3c2410_ops,
1758 .ep0 = &memory.ep[0].ep,
1759 .name = gadget_name,
1761 .init_name = "gadget",
1765 /* control endpoint */
1770 .ops = &s3c2410_ep_ops,
1771 .maxpacket = EP0_FIFO_SIZE,
1776 /* first group of endpoints */
1781 .ops = &s3c2410_ep_ops,
1782 .maxpacket = EP_FIFO_SIZE,
1785 .fifo_size = EP_FIFO_SIZE,
1786 .bEndpointAddress = 1,
1787 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1793 .ops = &s3c2410_ep_ops,
1794 .maxpacket = EP_FIFO_SIZE,
1797 .fifo_size = EP_FIFO_SIZE,
1798 .bEndpointAddress = 2,
1799 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1805 .ops = &s3c2410_ep_ops,
1806 .maxpacket = EP_FIFO_SIZE,
1809 .fifo_size = EP_FIFO_SIZE,
1810 .bEndpointAddress = 3,
1811 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1817 .ops = &s3c2410_ep_ops,
1818 .maxpacket = EP_FIFO_SIZE,
1821 .fifo_size = EP_FIFO_SIZE,
1822 .bEndpointAddress = 4,
1823 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1829 * probe - binds to the platform device
1831 static int s3c2410_udc_probe(struct platform_device *pdev)
1833 struct s3c2410_udc *udc = &memory;
1834 struct device *dev = &pdev->dev;
1838 dev_dbg(dev, "%s()\n", __func__);
1840 usb_bus_clock = clk_get(NULL, "usb-bus-gadget");
1841 if (IS_ERR(usb_bus_clock)) {
1842 dev_err(dev, "failed to get usb bus clock source\n");
1843 return PTR_ERR(usb_bus_clock);
1846 clk_enable(usb_bus_clock);
1848 udc_clock = clk_get(NULL, "usb-device");
1849 if (IS_ERR(udc_clock)) {
1850 dev_err(dev, "failed to get udc clock source\n");
1851 return PTR_ERR(udc_clock);
1854 clk_enable(udc_clock);
1858 dev_dbg(dev, "got and enabled clocks\n");
1860 if (strncmp(pdev->name, "s3c2440", 7) == 0) {
1861 dev_info(dev, "S3C2440: increasing FIFO to 128 bytes\n");
1862 memory.ep[1].fifo_size = S3C2440_EP_FIFO_SIZE;
1863 memory.ep[2].fifo_size = S3C2440_EP_FIFO_SIZE;
1864 memory.ep[3].fifo_size = S3C2440_EP_FIFO_SIZE;
1865 memory.ep[4].fifo_size = S3C2440_EP_FIFO_SIZE;
1868 spin_lock_init (&udc->lock);
1869 udc_info = pdev->dev.platform_data;
1871 rsrc_start = S3C2410_PA_USBDEV;
1872 rsrc_len = S3C24XX_SZ_USBDEV;
1874 if (!request_mem_region(rsrc_start, rsrc_len, gadget_name))
1877 base_addr = ioremap(rsrc_start, rsrc_len);
1883 device_initialize(&udc->gadget.dev);
1884 udc->gadget.dev.parent = &pdev->dev;
1885 udc->gadget.dev.dma_mask = pdev->dev.dma_mask;
1887 the_controller = udc;
1888 platform_set_drvdata(pdev, udc);
1890 s3c2410_udc_disable(udc);
1891 s3c2410_udc_reinit(udc);
1893 /* irq setup after old hardware state is cleaned up */
1894 retval = request_irq(IRQ_USBD, s3c2410_udc_irq,
1895 0, gadget_name, udc);
1898 dev_err(dev, "cannot get irq %i, err %d\n", IRQ_USBD, retval);
1903 dev_dbg(dev, "got irq %i\n", IRQ_USBD);
1905 if (udc_info && udc_info->vbus_pin > 0) {
1906 retval = gpio_request(udc_info->vbus_pin, "udc vbus");
1908 dev_err(dev, "cannot claim vbus pin\n");
1912 irq = gpio_to_irq(udc_info->vbus_pin);
1914 dev_err(dev, "no irq for gpio vbus pin\n");
1915 goto err_gpio_claim;
1918 retval = request_irq(irq, s3c2410_udc_vbus_irq,
1920 | IRQF_TRIGGER_FALLING | IRQF_SHARED,
1924 dev_err(dev, "can't get vbus irq %d, err %d\n",
1927 goto err_gpio_claim;
1930 dev_dbg(dev, "got irq %i\n", irq);
1935 if (udc_info && !udc_info->udc_command &&
1936 gpio_is_valid(udc_info->pullup_pin)) {
1938 retval = gpio_request_one(udc_info->pullup_pin,
1939 udc_info->vbus_pin_inverted ?
1940 GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
1946 retval = usb_add_gadget_udc(&pdev->dev, &udc->gadget);
1950 if (s3c2410_udc_debugfs_root) {
1951 udc->regs_info = debugfs_create_file("registers", S_IRUGO,
1952 s3c2410_udc_debugfs_root,
1953 udc, &s3c2410_udc_debugfs_fops);
1954 if (!udc->regs_info)
1955 dev_warn(dev, "debugfs file creation failed\n");
1958 dev_dbg(dev, "probe ok\n");
1963 if (udc_info && !udc_info->udc_command &&
1964 gpio_is_valid(udc_info->pullup_pin))
1965 gpio_free(udc_info->pullup_pin);
1967 if (udc_info && udc_info->vbus_pin > 0)
1968 free_irq(gpio_to_irq(udc_info->vbus_pin), udc);
1970 if (udc_info && udc_info->vbus_pin > 0)
1971 gpio_free(udc_info->vbus_pin);
1973 free_irq(IRQ_USBD, udc);
1977 release_mem_region(rsrc_start, rsrc_len);
1983 * s3c2410_udc_remove
1985 static int s3c2410_udc_remove(struct platform_device *pdev)
1987 struct s3c2410_udc *udc = platform_get_drvdata(pdev);
1990 dev_dbg(&pdev->dev, "%s()\n", __func__);
1992 usb_del_gadget_udc(&udc->gadget);
1996 debugfs_remove(udc->regs_info);
1998 if (udc_info && !udc_info->udc_command &&
1999 gpio_is_valid(udc_info->pullup_pin))
2000 gpio_free(udc_info->pullup_pin);
2002 if (udc_info && udc_info->vbus_pin > 0) {
2003 irq = gpio_to_irq(udc_info->vbus_pin);
2007 free_irq(IRQ_USBD, udc);
2010 release_mem_region(rsrc_start, rsrc_len);
2012 platform_set_drvdata(pdev, NULL);
2014 if (!IS_ERR(udc_clock) && udc_clock != NULL) {
2015 clk_disable(udc_clock);
2020 if (!IS_ERR(usb_bus_clock) && usb_bus_clock != NULL) {
2021 clk_disable(usb_bus_clock);
2022 clk_put(usb_bus_clock);
2023 usb_bus_clock = NULL;
2026 dev_dbg(&pdev->dev, "%s: remove ok\n", __func__);
2031 static int s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message)
2033 s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
2038 static int s3c2410_udc_resume(struct platform_device *pdev)
2040 s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
2045 #define s3c2410_udc_suspend NULL
2046 #define s3c2410_udc_resume NULL
2049 static const struct platform_device_id s3c_udc_ids[] = {
2050 { "s3c2410-usbgadget", },
2051 { "s3c2440-usbgadget", },
2054 MODULE_DEVICE_TABLE(platform, s3c_udc_ids);
2056 static struct platform_driver udc_driver_24x0 = {
2058 .name = "s3c24x0-usbgadget",
2059 .owner = THIS_MODULE,
2061 .probe = s3c2410_udc_probe,
2062 .remove = s3c2410_udc_remove,
2063 .suspend = s3c2410_udc_suspend,
2064 .resume = s3c2410_udc_resume,
2065 .id_table = s3c_udc_ids,
2068 static int __init udc_init(void)
2072 dprintk(DEBUG_NORMAL, "%s: version %s\n", gadget_name, DRIVER_VERSION);
2074 s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name, NULL);
2075 if (IS_ERR(s3c2410_udc_debugfs_root)) {
2076 printk(KERN_ERR "%s: debugfs dir creation failed %ld\n",
2077 gadget_name, PTR_ERR(s3c2410_udc_debugfs_root));
2078 s3c2410_udc_debugfs_root = NULL;
2081 retval = platform_driver_register(&udc_driver_24x0);
2088 debugfs_remove(s3c2410_udc_debugfs_root);
2092 static void __exit udc_exit(void)
2094 platform_driver_unregister(&udc_driver_24x0);
2095 debugfs_remove(s3c2410_udc_debugfs_root);
2098 module_init(udc_init);
2099 module_exit(udc_exit);
2101 MODULE_AUTHOR(DRIVER_AUTHOR);
2102 MODULE_DESCRIPTION(DRIVER_DESC);
2103 MODULE_VERSION(DRIVER_VERSION);
2104 MODULE_LICENSE("GPL");