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.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include <linux/module.h>
26 #include <linux/kernel.h>
27 #include <linux/delay.h>
28 #include <linux/ioport.h>
29 #include <linux/sched.h>
30 #include <linux/slab.h>
31 #include <linux/errno.h>
32 #include <linux/init.h>
33 #include <linux/timer.h>
34 #include <linux/list.h>
35 #include <linux/interrupt.h>
36 #include <linux/platform_device.h>
37 #include <linux/clk.h>
38 #include <linux/gpio.h>
39 #include <linux/prefetch.h>
41 #include <linux/debugfs.h>
42 #include <linux/seq_file.h>
44 #include <linux/usb.h>
45 #include <linux/usb/gadget.h>
47 #include <asm/byteorder.h>
50 #include <asm/system.h>
51 #include <asm/unaligned.h>
52 #include <mach/irqs.h>
54 #include <mach/hardware.h>
56 #include <plat/regs-udc.h>
60 #include "s3c2410_udc.h"
62 #define DRIVER_DESC "S3C2410 USB Device Controller Gadget"
63 #define DRIVER_VERSION "29 Apr 2007"
64 #define DRIVER_AUTHOR "Herbert Pötzl <herbert@13thfloor.at>, " \
65 "Arnaud Patard <arnaud.patard@rtp-net.org>"
67 static const char gadget_name[] = "s3c2410_udc";
68 static const char driver_desc[] = DRIVER_DESC;
70 static struct s3c2410_udc *the_controller;
71 static struct clk *udc_clock;
72 static struct clk *usb_bus_clock;
73 static void __iomem *base_addr;
74 static u64 rsrc_start;
76 static struct dentry *s3c2410_udc_debugfs_root;
78 static inline u32 udc_read(u32 reg)
80 return readb(base_addr + reg);
83 static inline void udc_write(u32 value, u32 reg)
85 writeb(value, base_addr + reg);
88 static inline void udc_writeb(void __iomem *base, u32 value, u32 reg)
90 writeb(value, base + reg);
93 static struct s3c2410_udc_mach_info *udc_info;
95 /*************************** DEBUG FUNCTION ***************************/
96 #define DEBUG_NORMAL 1
97 #define DEBUG_VERBOSE 2
99 #ifdef CONFIG_USB_S3C2410_DEBUG
100 #define USB_S3C2410_DEBUG_LEVEL 0
102 static uint32_t s3c2410_ticks = 0;
104 static int dprintk(int level, const char *fmt, ...)
106 static char printk_buf[1024];
107 static long prevticks;
108 static int invocation;
112 if (level > USB_S3C2410_DEBUG_LEVEL)
115 if (s3c2410_ticks != prevticks) {
116 prevticks = s3c2410_ticks;
120 len = scnprintf(printk_buf,
121 sizeof(printk_buf), "%1lu.%02d USB: ",
122 prevticks, invocation++);
125 len = vscnprintf(printk_buf+len,
126 sizeof(printk_buf)-len, fmt, args);
129 return printk(KERN_DEBUG "%s", printk_buf);
132 static int dprintk(int level, const char *fmt, ...)
137 static int s3c2410_udc_debugfs_seq_show(struct seq_file *m, void *p)
139 u32 addr_reg,pwr_reg,ep_int_reg,usb_int_reg;
140 u32 ep_int_en_reg, usb_int_en_reg, ep0_csr;
141 u32 ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2;
142 u32 ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2;
144 addr_reg = udc_read(S3C2410_UDC_FUNC_ADDR_REG);
145 pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
146 ep_int_reg = udc_read(S3C2410_UDC_EP_INT_REG);
147 usb_int_reg = udc_read(S3C2410_UDC_USB_INT_REG);
148 ep_int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
149 usb_int_en_reg = udc_read(S3C2410_UDC_USB_INT_EN_REG);
150 udc_write(0, S3C2410_UDC_INDEX_REG);
151 ep0_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
152 udc_write(1, S3C2410_UDC_INDEX_REG);
153 ep1_i_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
154 ep1_i_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
155 ep1_o_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
156 ep1_o_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
157 udc_write(2, S3C2410_UDC_INDEX_REG);
158 ep2_i_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
159 ep2_i_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
160 ep2_o_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
161 ep2_o_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
163 seq_printf(m, "FUNC_ADDR_REG : 0x%04X\n"
165 "EP_INT_REG : 0x%04X\n"
166 "USB_INT_REG : 0x%04X\n"
167 "EP_INT_EN_REG : 0x%04X\n"
168 "USB_INT_EN_REG : 0x%04X\n"
170 "EP1_I_CSR1 : 0x%04X\n"
171 "EP1_I_CSR2 : 0x%04X\n"
172 "EP1_O_CSR1 : 0x%04X\n"
173 "EP1_O_CSR2 : 0x%04X\n"
174 "EP2_I_CSR1 : 0x%04X\n"
175 "EP2_I_CSR2 : 0x%04X\n"
176 "EP2_O_CSR1 : 0x%04X\n"
177 "EP2_O_CSR2 : 0x%04X\n",
178 addr_reg,pwr_reg,ep_int_reg,usb_int_reg,
179 ep_int_en_reg, usb_int_en_reg, ep0_csr,
180 ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2,
181 ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2
187 static int s3c2410_udc_debugfs_fops_open(struct inode *inode,
190 return single_open(file, s3c2410_udc_debugfs_seq_show, NULL);
193 static const struct file_operations s3c2410_udc_debugfs_fops = {
194 .open = s3c2410_udc_debugfs_fops_open,
197 .release = single_release,
198 .owner = THIS_MODULE,
203 static inline void s3c2410_udc_clear_ep0_opr(void __iomem *base)
205 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
206 udc_writeb(base, S3C2410_UDC_EP0_CSR_SOPKTRDY,
207 S3C2410_UDC_EP0_CSR_REG);
210 static inline void s3c2410_udc_clear_ep0_sst(void __iomem *base)
212 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
213 writeb(0x00, base + S3C2410_UDC_EP0_CSR_REG);
216 static inline void s3c2410_udc_clear_ep0_se(void __iomem *base)
218 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
219 udc_writeb(base, S3C2410_UDC_EP0_CSR_SSE, S3C2410_UDC_EP0_CSR_REG);
222 static inline void s3c2410_udc_set_ep0_ipr(void __iomem *base)
224 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
225 udc_writeb(base, S3C2410_UDC_EP0_CSR_IPKRDY, S3C2410_UDC_EP0_CSR_REG);
228 static inline void s3c2410_udc_set_ep0_de(void __iomem *base)
230 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
231 udc_writeb(base, S3C2410_UDC_EP0_CSR_DE, S3C2410_UDC_EP0_CSR_REG);
234 inline void s3c2410_udc_set_ep0_ss(void __iomem *b)
236 udc_writeb(b, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
237 udc_writeb(b, S3C2410_UDC_EP0_CSR_SENDSTL, S3C2410_UDC_EP0_CSR_REG);
240 static inline void s3c2410_udc_set_ep0_de_out(void __iomem *base)
242 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
244 udc_writeb(base,(S3C2410_UDC_EP0_CSR_SOPKTRDY
245 | S3C2410_UDC_EP0_CSR_DE),
246 S3C2410_UDC_EP0_CSR_REG);
249 static inline void s3c2410_udc_set_ep0_sse_out(void __iomem *base)
251 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
252 udc_writeb(base, (S3C2410_UDC_EP0_CSR_SOPKTRDY
253 | S3C2410_UDC_EP0_CSR_SSE),
254 S3C2410_UDC_EP0_CSR_REG);
257 static inline void s3c2410_udc_set_ep0_de_in(void __iomem *base)
259 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
260 udc_writeb(base, (S3C2410_UDC_EP0_CSR_IPKRDY
261 | S3C2410_UDC_EP0_CSR_DE),
262 S3C2410_UDC_EP0_CSR_REG);
265 /*------------------------- I/O ----------------------------------*/
270 static void s3c2410_udc_done(struct s3c2410_ep *ep,
271 struct s3c2410_request *req, int status)
273 unsigned halted = ep->halted;
275 list_del_init(&req->queue);
277 if (likely (req->req.status == -EINPROGRESS))
278 req->req.status = status;
280 status = req->req.status;
283 req->req.complete(&ep->ep, &req->req);
287 static void s3c2410_udc_nuke(struct s3c2410_udc *udc,
288 struct s3c2410_ep *ep, int status)
291 if (&ep->queue == NULL)
294 while (!list_empty (&ep->queue)) {
295 struct s3c2410_request *req;
296 req = list_entry (ep->queue.next, struct s3c2410_request,
298 s3c2410_udc_done(ep, req, status);
302 static inline void s3c2410_udc_clear_ep_state(struct s3c2410_udc *dev)
306 /* hardware SET_{CONFIGURATION,INTERFACE} automagic resets endpoint
307 * fifos, and pending transactions mustn't be continued in any case.
310 for (i = 1; i < S3C2410_ENDPOINTS; i++)
311 s3c2410_udc_nuke(dev, &dev->ep[i], -ECONNABORTED);
314 static inline int s3c2410_udc_fifo_count_out(void)
318 tmp = udc_read(S3C2410_UDC_OUT_FIFO_CNT2_REG) << 8;
319 tmp |= udc_read(S3C2410_UDC_OUT_FIFO_CNT1_REG);
324 * s3c2410_udc_write_packet
326 static inline int s3c2410_udc_write_packet(int fifo,
327 struct s3c2410_request *req,
330 unsigned len = min(req->req.length - req->req.actual, max);
331 u8 *buf = req->req.buf + req->req.actual;
335 dprintk(DEBUG_VERBOSE, "%s %d %d %d %d\n", __func__,
336 req->req.actual, req->req.length, len, req->req.actual + len);
338 req->req.actual += len;
341 writesb(base_addr + fifo, buf, len);
346 * s3c2410_udc_write_fifo
348 * return: 0 = still running, 1 = completed, negative = errno
350 static int s3c2410_udc_write_fifo(struct s3c2410_ep *ep,
351 struct s3c2410_request *req)
359 idx = ep->bEndpointAddress & 0x7F;
364 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
367 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
370 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
373 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
376 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
380 count = s3c2410_udc_write_packet(fifo_reg, req, ep->ep.maxpacket);
382 /* last packet is often short (sometimes a zlp) */
383 if (count != ep->ep.maxpacket)
385 else if (req->req.length != req->req.actual || req->req.zero)
390 /* Only ep0 debug messages are interesting */
392 dprintk(DEBUG_NORMAL,
393 "Written ep%d %d.%d of %d b [last %d,z %d]\n",
394 idx, count, req->req.actual, req->req.length,
395 is_last, req->req.zero);
398 /* The order is important. It prevents sending 2 packets
399 * at the same time */
402 /* Reset signal => no need to say 'data sent' */
403 if (! (udc_read(S3C2410_UDC_USB_INT_REG)
404 & S3C2410_UDC_USBINT_RESET))
405 s3c2410_udc_set_ep0_de_in(base_addr);
406 ep->dev->ep0state=EP0_IDLE;
408 udc_write(idx, S3C2410_UDC_INDEX_REG);
409 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
410 udc_write(idx, S3C2410_UDC_INDEX_REG);
411 udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
412 S3C2410_UDC_IN_CSR1_REG);
415 s3c2410_udc_done(ep, req, 0);
419 /* Reset signal => no need to say 'data sent' */
420 if (! (udc_read(S3C2410_UDC_USB_INT_REG)
421 & S3C2410_UDC_USBINT_RESET))
422 s3c2410_udc_set_ep0_ipr(base_addr);
424 udc_write(idx, S3C2410_UDC_INDEX_REG);
425 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
426 udc_write(idx, S3C2410_UDC_INDEX_REG);
427 udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
428 S3C2410_UDC_IN_CSR1_REG);
435 static inline int s3c2410_udc_read_packet(int fifo, u8 *buf,
436 struct s3c2410_request *req, unsigned avail)
440 len = min(req->req.length - req->req.actual, avail);
441 req->req.actual += len;
443 readsb(fifo + base_addr, buf, len);
448 * return: 0 = still running, 1 = queue empty, negative = errno
450 static int s3c2410_udc_read_fifo(struct s3c2410_ep *ep,
451 struct s3c2410_request *req)
455 unsigned bufferspace;
462 idx = ep->bEndpointAddress & 0x7F;
468 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
471 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
474 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
477 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
480 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
484 if (!req->req.length)
487 buf = req->req.buf + req->req.actual;
488 bufferspace = req->req.length - req->req.actual;
490 dprintk(DEBUG_NORMAL, "%s: buffer full!\n", __func__);
494 udc_write(idx, S3C2410_UDC_INDEX_REG);
496 fifo_count = s3c2410_udc_fifo_count_out();
497 dprintk(DEBUG_NORMAL, "%s fifo count : %d\n", __func__, fifo_count);
499 if (fifo_count > ep->ep.maxpacket)
500 avail = ep->ep.maxpacket;
504 fifo_count = s3c2410_udc_read_packet(fifo_reg, buf, req, avail);
506 /* checking this with ep0 is not accurate as we already
507 * read a control request
509 if (idx != 0 && fifo_count < ep->ep.maxpacket) {
511 /* overflowed this request? flush extra data */
512 if (fifo_count != avail)
513 req->req.status = -EOVERFLOW;
515 is_last = (req->req.length <= req->req.actual) ? 1 : 0;
518 udc_write(idx, S3C2410_UDC_INDEX_REG);
519 fifo_count = s3c2410_udc_fifo_count_out();
521 /* Only ep0 debug messages are interesting */
523 dprintk(DEBUG_VERBOSE, "%s fifo count : %d [last %d]\n",
524 __func__, fifo_count,is_last);
528 s3c2410_udc_set_ep0_de_out(base_addr);
529 ep->dev->ep0state = EP0_IDLE;
531 udc_write(idx, S3C2410_UDC_INDEX_REG);
532 ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
533 udc_write(idx, S3C2410_UDC_INDEX_REG);
534 udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
535 S3C2410_UDC_OUT_CSR1_REG);
538 s3c2410_udc_done(ep, req, 0);
541 s3c2410_udc_clear_ep0_opr(base_addr);
543 udc_write(idx, S3C2410_UDC_INDEX_REG);
544 ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
545 udc_write(idx, S3C2410_UDC_INDEX_REG);
546 udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
547 S3C2410_UDC_OUT_CSR1_REG);
554 static int s3c2410_udc_read_fifo_crq(struct usb_ctrlrequest *crq)
556 unsigned char *outbuf = (unsigned char*)crq;
559 udc_write(0, S3C2410_UDC_INDEX_REG);
561 bytes_read = s3c2410_udc_fifo_count_out();
563 dprintk(DEBUG_NORMAL, "%s: fifo_count=%d\n", __func__, bytes_read);
565 if (bytes_read > sizeof(struct usb_ctrlrequest))
566 bytes_read = sizeof(struct usb_ctrlrequest);
568 readsb(S3C2410_UDC_EP0_FIFO_REG + base_addr, outbuf, bytes_read);
570 dprintk(DEBUG_VERBOSE, "%s: len=%d %02x:%02x {%x,%x,%x}\n", __func__,
571 bytes_read, crq->bRequest, crq->bRequestType,
572 crq->wValue, crq->wIndex, crq->wLength);
577 static int s3c2410_udc_get_status(struct s3c2410_udc *dev,
578 struct usb_ctrlrequest *crq)
581 u8 ep_num = crq->wIndex & 0x7F;
582 u8 is_in = crq->wIndex & USB_DIR_IN;
584 switch (crq->bRequestType & USB_RECIP_MASK) {
585 case USB_RECIP_INTERFACE:
588 case USB_RECIP_DEVICE:
589 status = dev->devstatus;
592 case USB_RECIP_ENDPOINT:
593 if (ep_num > 4 || crq->wLength > 2)
597 udc_write(0, S3C2410_UDC_INDEX_REG);
598 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
599 status = status & S3C2410_UDC_EP0_CSR_SENDSTL;
601 udc_write(ep_num, S3C2410_UDC_INDEX_REG);
603 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
604 status = status & S3C2410_UDC_ICSR1_SENDSTL;
606 status = udc_read(S3C2410_UDC_OUT_CSR1_REG);
607 status = status & S3C2410_UDC_OCSR1_SENDSTL;
611 status = status ? 1 : 0;
618 /* Seems to be needed to get it working. ouch :( */
620 udc_write(status & 0xFF, S3C2410_UDC_EP0_FIFO_REG);
621 udc_write(status >> 8, S3C2410_UDC_EP0_FIFO_REG);
622 s3c2410_udc_set_ep0_de_in(base_addr);
626 /*------------------------- usb state machine -------------------------------*/
627 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value);
629 static void s3c2410_udc_handle_ep0_idle(struct s3c2410_udc *dev,
630 struct s3c2410_ep *ep,
631 struct usb_ctrlrequest *crq,
636 /* start control request? */
637 if (!(ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY))
640 s3c2410_udc_nuke(dev, ep, -EPROTO);
642 len = s3c2410_udc_read_fifo_crq(crq);
643 if (len != sizeof(*crq)) {
644 dprintk(DEBUG_NORMAL, "setup begin: fifo READ ERROR"
645 " wanted %d bytes got %d. Stalling out...\n",
647 s3c2410_udc_set_ep0_ss(base_addr);
651 dprintk(DEBUG_NORMAL, "bRequest = %d bRequestType %d wLength = %d\n",
652 crq->bRequest, crq->bRequestType, crq->wLength);
654 /* cope with automagic for some standard requests. */
655 dev->req_std = (crq->bRequestType & USB_TYPE_MASK)
656 == USB_TYPE_STANDARD;
658 dev->req_pending = 1;
660 switch (crq->bRequest) {
661 case USB_REQ_SET_CONFIGURATION:
662 dprintk(DEBUG_NORMAL, "USB_REQ_SET_CONFIGURATION ... \n");
664 if (crq->bRequestType == USB_RECIP_DEVICE) {
666 s3c2410_udc_set_ep0_de_out(base_addr);
670 case USB_REQ_SET_INTERFACE:
671 dprintk(DEBUG_NORMAL, "USB_REQ_SET_INTERFACE ... \n");
673 if (crq->bRequestType == USB_RECIP_INTERFACE) {
675 s3c2410_udc_set_ep0_de_out(base_addr);
679 case USB_REQ_SET_ADDRESS:
680 dprintk(DEBUG_NORMAL, "USB_REQ_SET_ADDRESS ... \n");
682 if (crq->bRequestType == USB_RECIP_DEVICE) {
683 tmp = crq->wValue & 0x7F;
685 udc_write((tmp | S3C2410_UDC_FUNCADDR_UPDATE),
686 S3C2410_UDC_FUNC_ADDR_REG);
687 s3c2410_udc_set_ep0_de_out(base_addr);
692 case USB_REQ_GET_STATUS:
693 dprintk(DEBUG_NORMAL, "USB_REQ_GET_STATUS ... \n");
694 s3c2410_udc_clear_ep0_opr(base_addr);
697 if (!s3c2410_udc_get_status(dev, crq)) {
703 case USB_REQ_CLEAR_FEATURE:
704 s3c2410_udc_clear_ep0_opr(base_addr);
706 if (crq->bRequestType != USB_RECIP_ENDPOINT)
709 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
712 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 0);
713 s3c2410_udc_set_ep0_de_out(base_addr);
716 case USB_REQ_SET_FEATURE:
717 s3c2410_udc_clear_ep0_opr(base_addr);
719 if (crq->bRequestType != USB_RECIP_ENDPOINT)
722 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
725 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 1);
726 s3c2410_udc_set_ep0_de_out(base_addr);
730 s3c2410_udc_clear_ep0_opr(base_addr);
734 if (crq->bRequestType & USB_DIR_IN)
735 dev->ep0state = EP0_IN_DATA_PHASE;
737 dev->ep0state = EP0_OUT_DATA_PHASE;
742 /* deliver the request to the gadget driver */
743 ret = dev->driver->setup(&dev->gadget, crq);
745 if (dev->req_config) {
746 dprintk(DEBUG_NORMAL, "config change %02x fail %d?\n",
751 if (ret == -EOPNOTSUPP)
752 dprintk(DEBUG_NORMAL, "Operation not supported\n");
754 dprintk(DEBUG_NORMAL,
755 "dev->driver->setup failed. (%d)\n", ret);
758 s3c2410_udc_set_ep0_ss(base_addr);
759 s3c2410_udc_set_ep0_de_out(base_addr);
760 dev->ep0state = EP0_IDLE;
761 /* deferred i/o == no response yet */
762 } else if (dev->req_pending) {
763 dprintk(DEBUG_VERBOSE, "dev->req_pending... what now?\n");
767 dprintk(DEBUG_VERBOSE, "ep0state %s\n", ep0states[dev->ep0state]);
770 static void s3c2410_udc_handle_ep0(struct s3c2410_udc *dev)
773 struct s3c2410_ep *ep = &dev->ep[0];
774 struct s3c2410_request *req;
775 struct usb_ctrlrequest crq;
777 if (list_empty(&ep->queue))
780 req = list_entry(ep->queue.next, struct s3c2410_request, queue);
782 /* We make the assumption that S3C2410_UDC_IN_CSR1_REG equal to
783 * S3C2410_UDC_EP0_CSR_REG when index is zero */
785 udc_write(0, S3C2410_UDC_INDEX_REG);
786 ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
788 dprintk(DEBUG_NORMAL, "ep0csr %x ep0state %s\n",
789 ep0csr, ep0states[dev->ep0state]);
791 /* clear stall status */
792 if (ep0csr & S3C2410_UDC_EP0_CSR_SENTSTL) {
793 s3c2410_udc_nuke(dev, ep, -EPIPE);
794 dprintk(DEBUG_NORMAL, "... clear SENT_STALL ...\n");
795 s3c2410_udc_clear_ep0_sst(base_addr);
796 dev->ep0state = EP0_IDLE;
800 /* clear setup end */
801 if (ep0csr & S3C2410_UDC_EP0_CSR_SE) {
802 dprintk(DEBUG_NORMAL, "... serviced SETUP_END ...\n");
803 s3c2410_udc_nuke(dev, ep, 0);
804 s3c2410_udc_clear_ep0_se(base_addr);
805 dev->ep0state = EP0_IDLE;
808 switch (dev->ep0state) {
810 s3c2410_udc_handle_ep0_idle(dev, ep, &crq, ep0csr);
813 case EP0_IN_DATA_PHASE: /* GET_DESCRIPTOR etc */
814 dprintk(DEBUG_NORMAL, "EP0_IN_DATA_PHASE ... what now?\n");
815 if (!(ep0csr & S3C2410_UDC_EP0_CSR_IPKRDY) && req) {
816 s3c2410_udc_write_fifo(ep, req);
820 case EP0_OUT_DATA_PHASE: /* SET_DESCRIPTOR etc */
821 dprintk(DEBUG_NORMAL, "EP0_OUT_DATA_PHASE ... what now?\n");
822 if ((ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY) && req ) {
823 s3c2410_udc_read_fifo(ep,req);
828 dprintk(DEBUG_NORMAL, "EP0_END_XFER ... what now?\n");
829 dev->ep0state = EP0_IDLE;
833 dprintk(DEBUG_NORMAL, "EP0_STALL ... what now?\n");
834 dev->ep0state = EP0_IDLE;
840 * handle_ep - Manage I/O endpoints
843 static void s3c2410_udc_handle_ep(struct s3c2410_ep *ep)
845 struct s3c2410_request *req;
846 int is_in = ep->bEndpointAddress & USB_DIR_IN;
850 if (likely (!list_empty(&ep->queue)))
851 req = list_entry(ep->queue.next,
852 struct s3c2410_request, queue);
856 idx = ep->bEndpointAddress & 0x7F;
859 udc_write(idx, S3C2410_UDC_INDEX_REG);
860 ep_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
861 dprintk(DEBUG_VERBOSE, "ep%01d write csr:%02x %d\n",
862 idx, ep_csr1, req ? 1 : 0);
864 if (ep_csr1 & S3C2410_UDC_ICSR1_SENTSTL) {
865 dprintk(DEBUG_VERBOSE, "st\n");
866 udc_write(idx, S3C2410_UDC_INDEX_REG);
867 udc_write(ep_csr1 & ~S3C2410_UDC_ICSR1_SENTSTL,
868 S3C2410_UDC_IN_CSR1_REG);
872 if (!(ep_csr1 & S3C2410_UDC_ICSR1_PKTRDY) && req) {
873 s3c2410_udc_write_fifo(ep,req);
876 udc_write(idx, S3C2410_UDC_INDEX_REG);
877 ep_csr1 = udc_read(S3C2410_UDC_OUT_CSR1_REG);
878 dprintk(DEBUG_VERBOSE, "ep%01d rd csr:%02x\n", idx, ep_csr1);
880 if (ep_csr1 & S3C2410_UDC_OCSR1_SENTSTL) {
881 udc_write(idx, S3C2410_UDC_INDEX_REG);
882 udc_write(ep_csr1 & ~S3C2410_UDC_OCSR1_SENTSTL,
883 S3C2410_UDC_OUT_CSR1_REG);
887 if ((ep_csr1 & S3C2410_UDC_OCSR1_PKTRDY) && req) {
888 s3c2410_udc_read_fifo(ep,req);
893 #include <mach/regs-irq.h>
896 * s3c2410_udc_irq - interrupt handler
898 static irqreturn_t s3c2410_udc_irq(int dummy, void *_dev)
900 struct s3c2410_udc *dev = _dev;
909 spin_lock_irqsave(&dev->lock, flags);
911 /* Driver connected ? */
913 /* Clear interrupts */
914 udc_write(udc_read(S3C2410_UDC_USB_INT_REG),
915 S3C2410_UDC_USB_INT_REG);
916 udc_write(udc_read(S3C2410_UDC_EP_INT_REG),
917 S3C2410_UDC_EP_INT_REG);
921 idx = udc_read(S3C2410_UDC_INDEX_REG);
923 /* Read status registers */
924 usb_status = udc_read(S3C2410_UDC_USB_INT_REG);
925 usbd_status = udc_read(S3C2410_UDC_EP_INT_REG);
926 pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
928 udc_writeb(base_addr, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
929 ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
931 dprintk(DEBUG_NORMAL, "usbs=%02x, usbds=%02x, pwr=%02x ep0csr=%02x\n",
932 usb_status, usbd_status, pwr_reg, ep0csr);
935 * Now, handle interrupts. There's two types :
936 * - Reset, Resume, Suspend coming -> usb_int_reg
941 if (usb_status & S3C2410_UDC_USBINT_RESET) {
942 /* two kind of reset :
943 * - reset start -> pwr reg = 8
944 * - reset end -> pwr reg = 0
946 dprintk(DEBUG_NORMAL, "USB reset csr %x pwr %x\n",
949 dev->gadget.speed = USB_SPEED_UNKNOWN;
950 udc_write(0x00, S3C2410_UDC_INDEX_REG);
951 udc_write((dev->ep[0].ep.maxpacket & 0x7ff) >> 3,
952 S3C2410_UDC_MAXP_REG);
955 dev->ep0state = EP0_IDLE;
956 dev->gadget.speed = USB_SPEED_FULL;
958 /* clear interrupt */
959 udc_write(S3C2410_UDC_USBINT_RESET,
960 S3C2410_UDC_USB_INT_REG);
962 udc_write(idx, S3C2410_UDC_INDEX_REG);
963 spin_unlock_irqrestore(&dev->lock, flags);
968 if (usb_status & S3C2410_UDC_USBINT_RESUME) {
969 dprintk(DEBUG_NORMAL, "USB resume\n");
971 /* clear interrupt */
972 udc_write(S3C2410_UDC_USBINT_RESUME,
973 S3C2410_UDC_USB_INT_REG);
975 if (dev->gadget.speed != USB_SPEED_UNKNOWN
977 && dev->driver->resume)
978 dev->driver->resume(&dev->gadget);
982 if (usb_status & S3C2410_UDC_USBINT_SUSPEND) {
983 dprintk(DEBUG_NORMAL, "USB suspend\n");
985 /* clear interrupt */
986 udc_write(S3C2410_UDC_USBINT_SUSPEND,
987 S3C2410_UDC_USB_INT_REG);
989 if (dev->gadget.speed != USB_SPEED_UNKNOWN
991 && dev->driver->suspend)
992 dev->driver->suspend(&dev->gadget);
994 dev->ep0state = EP0_IDLE;
998 /* control traffic */
999 /* check on ep0csr != 0 is not a good idea as clearing in_pkt_ready
1000 * generate an interrupt
1002 if (usbd_status & S3C2410_UDC_INT_EP0) {
1003 dprintk(DEBUG_VERBOSE, "USB ep0 irq\n");
1004 /* Clear the interrupt bit by setting it to 1 */
1005 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_REG);
1006 s3c2410_udc_handle_ep0(dev);
1009 /* endpoint data transfers */
1010 for (i = 1; i < S3C2410_ENDPOINTS; i++) {
1012 if (usbd_status & tmp) {
1013 dprintk(DEBUG_VERBOSE, "USB ep%d irq\n", i);
1015 /* Clear the interrupt bit by setting it to 1 */
1016 udc_write(tmp, S3C2410_UDC_EP_INT_REG);
1017 s3c2410_udc_handle_ep(&dev->ep[i]);
1021 /* what else causes this interrupt? a receive! who is it? */
1022 if (!usb_status && !usbd_status && !pwr_reg && !ep0csr) {
1023 for (i = 1; i < S3C2410_ENDPOINTS; i++) {
1024 idx2 = udc_read(S3C2410_UDC_INDEX_REG);
1025 udc_write(i, S3C2410_UDC_INDEX_REG);
1027 if (udc_read(S3C2410_UDC_OUT_CSR1_REG) & 0x1)
1028 s3c2410_udc_handle_ep(&dev->ep[i]);
1031 udc_write(idx2, S3C2410_UDC_INDEX_REG);
1035 dprintk(DEBUG_VERBOSE, "irq: %d s3c2410_udc_done.\n", IRQ_USBD);
1037 /* Restore old index */
1038 udc_write(idx, S3C2410_UDC_INDEX_REG);
1040 spin_unlock_irqrestore(&dev->lock, flags);
1044 /*------------------------- s3c2410_ep_ops ----------------------------------*/
1046 static inline struct s3c2410_ep *to_s3c2410_ep(struct usb_ep *ep)
1048 return container_of(ep, struct s3c2410_ep, ep);
1051 static inline struct s3c2410_udc *to_s3c2410_udc(struct usb_gadget *gadget)
1053 return container_of(gadget, struct s3c2410_udc, gadget);
1056 static inline struct s3c2410_request *to_s3c2410_req(struct usb_request *req)
1058 return container_of(req, struct s3c2410_request, req);
1062 * s3c2410_udc_ep_enable
1064 static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
1065 const struct usb_endpoint_descriptor *desc)
1067 struct s3c2410_udc *dev;
1068 struct s3c2410_ep *ep;
1070 unsigned long flags;
1074 ep = to_s3c2410_ep(_ep);
1076 if (!_ep || !desc || ep->desc
1077 || _ep->name == ep0name
1078 || desc->bDescriptorType != USB_DT_ENDPOINT)
1082 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
1085 max = le16_to_cpu(desc->wMaxPacketSize) & 0x1fff;
1087 local_irq_save (flags);
1088 _ep->maxpacket = max & 0x7ff;
1091 ep->bEndpointAddress = desc->bEndpointAddress;
1093 /* set max packet */
1094 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1095 udc_write(max >> 3, S3C2410_UDC_MAXP_REG);
1097 /* set type, direction, address; reset fifo counters */
1098 if (desc->bEndpointAddress & USB_DIR_IN) {
1099 csr1 = S3C2410_UDC_ICSR1_FFLUSH|S3C2410_UDC_ICSR1_CLRDT;
1100 csr2 = S3C2410_UDC_ICSR2_MODEIN|S3C2410_UDC_ICSR2_DMAIEN;
1102 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1103 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1104 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1105 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1107 /* don't flush in fifo or it will cause endpoint interrupt */
1108 csr1 = S3C2410_UDC_ICSR1_CLRDT;
1109 csr2 = S3C2410_UDC_ICSR2_DMAIEN;
1111 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1112 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1113 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1114 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1116 csr1 = S3C2410_UDC_OCSR1_FFLUSH | S3C2410_UDC_OCSR1_CLRDT;
1117 csr2 = S3C2410_UDC_OCSR2_DMAIEN;
1119 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1120 udc_write(csr1, S3C2410_UDC_OUT_CSR1_REG);
1121 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1122 udc_write(csr2, S3C2410_UDC_OUT_CSR2_REG);
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 /* print some debug message */
1130 tmp = desc->bEndpointAddress;
1131 dprintk (DEBUG_NORMAL, "enable %s(%d) ep%x%s-blk max %02x\n",
1132 _ep->name,ep->num, tmp,
1133 desc->bEndpointAddress & USB_DIR_IN ? "in" : "out", max);
1135 local_irq_restore (flags);
1136 s3c2410_udc_set_halt(_ep, 0);
1142 * s3c2410_udc_ep_disable
1144 static int s3c2410_udc_ep_disable(struct usb_ep *_ep)
1146 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1147 unsigned long flags;
1150 if (!_ep || !ep->desc) {
1151 dprintk(DEBUG_NORMAL, "%s not enabled\n",
1152 _ep ? ep->ep.name : NULL);
1156 local_irq_save(flags);
1158 dprintk(DEBUG_NORMAL, "ep_disable: %s\n", _ep->name);
1163 s3c2410_udc_nuke (ep->dev, ep, -ESHUTDOWN);
1166 int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1167 udc_write(int_en_reg & ~(1<<ep->num), S3C2410_UDC_EP_INT_EN_REG);
1169 local_irq_restore(flags);
1171 dprintk(DEBUG_NORMAL, "%s disabled\n", _ep->name);
1177 * s3c2410_udc_alloc_request
1179 static struct usb_request *
1180 s3c2410_udc_alloc_request(struct usb_ep *_ep, gfp_t mem_flags)
1182 struct s3c2410_request *req;
1184 dprintk(DEBUG_VERBOSE,"%s(%p,%d)\n", __func__, _ep, mem_flags);
1189 req = kzalloc (sizeof(struct s3c2410_request), mem_flags);
1193 INIT_LIST_HEAD (&req->queue);
1198 * s3c2410_udc_free_request
1201 s3c2410_udc_free_request(struct usb_ep *_ep, struct usb_request *_req)
1203 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1204 struct s3c2410_request *req = to_s3c2410_req(_req);
1206 dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1208 if (!ep || !_req || (!ep->desc && _ep->name != ep0name))
1211 WARN_ON (!list_empty (&req->queue));
1218 static int s3c2410_udc_queue(struct usb_ep *_ep, struct usb_request *_req,
1221 struct s3c2410_request *req = to_s3c2410_req(_req);
1222 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1223 struct s3c2410_udc *dev;
1226 unsigned long flags;
1228 if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1229 dprintk(DEBUG_NORMAL, "%s: invalid args\n", __func__);
1234 if (unlikely (!dev->driver
1235 || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
1239 local_irq_save (flags);
1241 if (unlikely(!_req || !_req->complete
1242 || !_req->buf || !list_empty(&req->queue))) {
1244 dprintk(DEBUG_NORMAL, "%s: 1 X X X\n", __func__);
1246 dprintk(DEBUG_NORMAL, "%s: 0 %01d %01d %01d\n",
1247 __func__, !_req->complete,!_req->buf,
1248 !list_empty(&req->queue));
1251 local_irq_restore(flags);
1255 _req->status = -EINPROGRESS;
1258 dprintk(DEBUG_VERBOSE, "%s: ep%x len %d\n",
1259 __func__, ep->bEndpointAddress, _req->length);
1261 if (ep->bEndpointAddress) {
1262 udc_write(ep->bEndpointAddress & 0x7F, S3C2410_UDC_INDEX_REG);
1264 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1265 ? S3C2410_UDC_IN_CSR1_REG
1266 : S3C2410_UDC_OUT_CSR1_REG);
1267 fifo_count = s3c2410_udc_fifo_count_out();
1269 udc_write(0, S3C2410_UDC_INDEX_REG);
1270 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
1271 fifo_count = s3c2410_udc_fifo_count_out();
1274 /* kickstart this i/o queue? */
1275 if (list_empty(&ep->queue) && !ep->halted) {
1276 if (ep->bEndpointAddress == 0 /* ep0 */) {
1277 switch (dev->ep0state) {
1278 case EP0_IN_DATA_PHASE:
1279 if (!(ep_csr&S3C2410_UDC_EP0_CSR_IPKRDY)
1280 && s3c2410_udc_write_fifo(ep,
1282 dev->ep0state = EP0_IDLE;
1287 case EP0_OUT_DATA_PHASE:
1289 || ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1290 && s3c2410_udc_read_fifo(ep,
1292 dev->ep0state = EP0_IDLE;
1298 local_irq_restore(flags);
1301 } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0
1302 && (!(ep_csr&S3C2410_UDC_OCSR1_PKTRDY))
1303 && s3c2410_udc_write_fifo(ep, req)) {
1305 } else if ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1307 && s3c2410_udc_read_fifo(ep, req)) {
1312 /* pio or dma irq handler advances the queue. */
1313 if (likely (req != 0))
1314 list_add_tail(&req->queue, &ep->queue);
1316 local_irq_restore(flags);
1318 dprintk(DEBUG_VERBOSE, "%s ok\n", __func__);
1323 * s3c2410_udc_dequeue
1325 static int s3c2410_udc_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1327 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1328 struct s3c2410_udc *udc;
1329 int retval = -EINVAL;
1330 unsigned long flags;
1331 struct s3c2410_request *req = NULL;
1333 dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1335 if (!the_controller->driver)
1341 udc = to_s3c2410_udc(ep->gadget);
1343 local_irq_save (flags);
1345 list_for_each_entry (req, &ep->queue, queue) {
1346 if (&req->req == _req) {
1347 list_del_init (&req->queue);
1348 _req->status = -ECONNRESET;
1355 dprintk(DEBUG_VERBOSE,
1356 "dequeued req %p from %s, len %d buf %p\n",
1357 req, _ep->name, _req->length, _req->buf);
1359 s3c2410_udc_done(ep, req, -ECONNRESET);
1362 local_irq_restore (flags);
1367 * s3c2410_udc_set_halt
1369 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value)
1371 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1373 unsigned long flags;
1376 if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1377 dprintk(DEBUG_NORMAL, "%s: inval 2\n", __func__);
1381 local_irq_save (flags);
1383 idx = ep->bEndpointAddress & 0x7F;
1386 s3c2410_udc_set_ep0_ss(base_addr);
1387 s3c2410_udc_set_ep0_de_out(base_addr);
1389 udc_write(idx, S3C2410_UDC_INDEX_REG);
1390 ep_csr = udc_read((ep->bEndpointAddress &USB_DIR_IN)
1391 ? S3C2410_UDC_IN_CSR1_REG
1392 : S3C2410_UDC_OUT_CSR1_REG);
1394 if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
1396 udc_write(ep_csr | S3C2410_UDC_ICSR1_SENDSTL,
1397 S3C2410_UDC_IN_CSR1_REG);
1399 ep_csr &= ~S3C2410_UDC_ICSR1_SENDSTL;
1400 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1401 ep_csr |= S3C2410_UDC_ICSR1_CLRDT;
1402 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1406 udc_write(ep_csr | S3C2410_UDC_OCSR1_SENDSTL,
1407 S3C2410_UDC_OUT_CSR1_REG);
1409 ep_csr &= ~S3C2410_UDC_OCSR1_SENDSTL;
1410 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1411 ep_csr |= S3C2410_UDC_OCSR1_CLRDT;
1412 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1417 ep->halted = value ? 1 : 0;
1418 local_irq_restore (flags);
1423 static const struct usb_ep_ops s3c2410_ep_ops = {
1424 .enable = s3c2410_udc_ep_enable,
1425 .disable = s3c2410_udc_ep_disable,
1427 .alloc_request = s3c2410_udc_alloc_request,
1428 .free_request = s3c2410_udc_free_request,
1430 .queue = s3c2410_udc_queue,
1431 .dequeue = s3c2410_udc_dequeue,
1433 .set_halt = s3c2410_udc_set_halt,
1436 /*------------------------- usb_gadget_ops ----------------------------------*/
1439 * s3c2410_udc_get_frame
1441 static int s3c2410_udc_get_frame(struct usb_gadget *_gadget)
1445 dprintk(DEBUG_VERBOSE, "%s()\n", __func__);
1447 tmp = udc_read(S3C2410_UDC_FRAME_NUM2_REG) << 8;
1448 tmp |= udc_read(S3C2410_UDC_FRAME_NUM1_REG);
1453 * s3c2410_udc_wakeup
1455 static int s3c2410_udc_wakeup(struct usb_gadget *_gadget)
1457 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1462 * s3c2410_udc_set_selfpowered
1464 static int s3c2410_udc_set_selfpowered(struct usb_gadget *gadget, int value)
1466 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1468 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1471 udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
1473 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
1478 static void s3c2410_udc_disable(struct s3c2410_udc *dev);
1479 static void s3c2410_udc_enable(struct s3c2410_udc *dev);
1481 static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on)
1483 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1485 if (udc_info && (udc_info->udc_command ||
1486 gpio_is_valid(udc_info->pullup_pin))) {
1489 s3c2410_udc_enable(udc);
1491 if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
1492 if (udc->driver && udc->driver->disconnect)
1493 udc->driver->disconnect(&udc->gadget);
1496 s3c2410_udc_disable(udc);
1505 static int s3c2410_udc_vbus_session(struct usb_gadget *gadget, int is_active)
1507 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1509 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1511 udc->vbus = (is_active != 0);
1512 s3c2410_udc_set_pullup(udc, is_active);
1516 static int s3c2410_udc_pullup(struct usb_gadget *gadget, int is_on)
1518 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1520 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1522 s3c2410_udc_set_pullup(udc, is_on ? 0 : 1);
1526 static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev)
1528 struct s3c2410_udc *dev = _dev;
1531 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1533 value = gpio_get_value(udc_info->vbus_pin) ? 1 : 0;
1534 if (udc_info->vbus_pin_inverted)
1537 if (value != dev->vbus)
1538 s3c2410_udc_vbus_session(&dev->gadget, value);
1543 static int s3c2410_vbus_draw(struct usb_gadget *_gadget, unsigned ma)
1545 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1547 if (udc_info && udc_info->vbus_draw) {
1548 udc_info->vbus_draw(ma);
1555 static const struct usb_gadget_ops s3c2410_ops = {
1556 .get_frame = s3c2410_udc_get_frame,
1557 .wakeup = s3c2410_udc_wakeup,
1558 .set_selfpowered = s3c2410_udc_set_selfpowered,
1559 .pullup = s3c2410_udc_pullup,
1560 .vbus_session = s3c2410_udc_vbus_session,
1561 .vbus_draw = s3c2410_vbus_draw,
1564 static void s3c2410_udc_command(enum s3c2410_udc_cmd_e cmd)
1569 if (udc_info->udc_command) {
1570 udc_info->udc_command(S3C2410_UDC_P_DISABLE);
1571 } else if (gpio_is_valid(udc_info->pullup_pin)) {
1575 case S3C2410_UDC_P_ENABLE:
1578 case S3C2410_UDC_P_DISABLE:
1584 value ^= udc_info->pullup_pin_inverted;
1586 gpio_set_value(udc_info->pullup_pin, value);
1590 /*------------------------- gadget driver handling---------------------------*/
1592 * s3c2410_udc_disable
1594 static void s3c2410_udc_disable(struct s3c2410_udc *dev)
1596 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1598 /* Disable all interrupts */
1599 udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG);
1600 udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG);
1602 /* Clear the interrupt registers */
1603 udc_write(S3C2410_UDC_USBINT_RESET
1604 | S3C2410_UDC_USBINT_RESUME
1605 | S3C2410_UDC_USBINT_SUSPEND,
1606 S3C2410_UDC_USB_INT_REG);
1608 udc_write(0x1F, S3C2410_UDC_EP_INT_REG);
1610 /* Good bye, cruel world */
1611 s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
1613 /* Set speed to unknown */
1614 dev->gadget.speed = USB_SPEED_UNKNOWN;
1618 * s3c2410_udc_reinit
1620 static void s3c2410_udc_reinit(struct s3c2410_udc *dev)
1624 /* device/ep0 records init */
1625 INIT_LIST_HEAD (&dev->gadget.ep_list);
1626 INIT_LIST_HEAD (&dev->gadget.ep0->ep_list);
1627 dev->ep0state = EP0_IDLE;
1629 for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1630 struct s3c2410_ep *ep = &dev->ep[i];
1633 list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
1638 INIT_LIST_HEAD (&ep->queue);
1643 * s3c2410_udc_enable
1645 static void s3c2410_udc_enable(struct s3c2410_udc *dev)
1649 dprintk(DEBUG_NORMAL, "s3c2410_udc_enable called\n");
1651 /* dev->gadget.speed = USB_SPEED_UNKNOWN; */
1652 dev->gadget.speed = USB_SPEED_FULL;
1654 /* Set MAXP for all endpoints */
1655 for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1656 udc_write(i, S3C2410_UDC_INDEX_REG);
1657 udc_write((dev->ep[i].ep.maxpacket & 0x7ff) >> 3,
1658 S3C2410_UDC_MAXP_REG);
1661 /* Set default power state */
1662 udc_write(DEFAULT_POWER_STATE, S3C2410_UDC_PWR_REG);
1664 /* Enable reset and suspend interrupt interrupts */
1665 udc_write(S3C2410_UDC_USBINT_RESET | S3C2410_UDC_USBINT_SUSPEND,
1666 S3C2410_UDC_USB_INT_EN_REG);
1668 /* Enable ep0 interrupt */
1669 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG);
1671 /* time to say "hello, world" */
1672 s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
1676 * usb_gadget_probe_driver
1678 int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
1679 int (*bind)(struct usb_gadget *))
1681 struct s3c2410_udc *udc = the_controller;
1684 dprintk(DEBUG_NORMAL, "%s() '%s'\n", __func__, driver->driver.name);
1693 if (!bind || !driver->setup || driver->speed < USB_SPEED_FULL) {
1694 printk(KERN_ERR "Invalid driver: bind %p setup %p speed %d\n",
1695 bind, driver->setup, driver->speed);
1699 if (!driver->unbind) {
1700 printk(KERN_ERR "Invalid driver: no unbind method\n");
1705 /* Hook the driver */
1706 udc->driver = driver;
1707 udc->gadget.dev.driver = &driver->driver;
1709 /* Bind the driver */
1710 if ((retval = device_add(&udc->gadget.dev)) != 0) {
1711 printk(KERN_ERR "Error in device_add() : %d\n",retval);
1712 goto register_error;
1715 dprintk(DEBUG_NORMAL, "binding gadget driver '%s'\n",
1716 driver->driver.name);
1718 if ((retval = bind(&udc->gadget)) != 0) {
1719 device_del(&udc->gadget.dev);
1720 goto register_error;
1724 s3c2410_udc_enable(udc);
1730 udc->gadget.dev.driver = NULL;
1733 EXPORT_SYMBOL(usb_gadget_probe_driver);
1736 * usb_gadget_unregister_driver
1738 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1740 struct s3c2410_udc *udc = the_controller;
1745 if (!driver || driver != udc->driver || !driver->unbind)
1748 dprintk(DEBUG_NORMAL, "usb_gadget_unregister_driver() '%s'\n",
1749 driver->driver.name);
1751 /* report disconnect */
1752 if (driver->disconnect)
1753 driver->disconnect(&udc->gadget);
1755 driver->unbind(&udc->gadget);
1757 device_del(&udc->gadget.dev);
1761 s3c2410_udc_disable(udc);
1766 /*---------------------------------------------------------------------------*/
1767 static struct s3c2410_udc memory = {
1769 .ops = &s3c2410_ops,
1770 .ep0 = &memory.ep[0].ep,
1771 .name = gadget_name,
1773 .init_name = "gadget",
1777 /* control endpoint */
1782 .ops = &s3c2410_ep_ops,
1783 .maxpacket = EP0_FIFO_SIZE,
1788 /* first group of endpoints */
1793 .ops = &s3c2410_ep_ops,
1794 .maxpacket = EP_FIFO_SIZE,
1797 .fifo_size = EP_FIFO_SIZE,
1798 .bEndpointAddress = 1,
1799 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1805 .ops = &s3c2410_ep_ops,
1806 .maxpacket = EP_FIFO_SIZE,
1809 .fifo_size = EP_FIFO_SIZE,
1810 .bEndpointAddress = 2,
1811 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1817 .ops = &s3c2410_ep_ops,
1818 .maxpacket = EP_FIFO_SIZE,
1821 .fifo_size = EP_FIFO_SIZE,
1822 .bEndpointAddress = 3,
1823 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1829 .ops = &s3c2410_ep_ops,
1830 .maxpacket = EP_FIFO_SIZE,
1833 .fifo_size = EP_FIFO_SIZE,
1834 .bEndpointAddress = 4,
1835 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1841 * probe - binds to the platform device
1843 static int s3c2410_udc_probe(struct platform_device *pdev)
1845 struct s3c2410_udc *udc = &memory;
1846 struct device *dev = &pdev->dev;
1850 dev_dbg(dev, "%s()\n", __func__);
1852 usb_bus_clock = clk_get(NULL, "usb-bus-gadget");
1853 if (IS_ERR(usb_bus_clock)) {
1854 dev_err(dev, "failed to get usb bus clock source\n");
1855 return PTR_ERR(usb_bus_clock);
1858 clk_enable(usb_bus_clock);
1860 udc_clock = clk_get(NULL, "usb-device");
1861 if (IS_ERR(udc_clock)) {
1862 dev_err(dev, "failed to get udc clock source\n");
1863 return PTR_ERR(udc_clock);
1866 clk_enable(udc_clock);
1870 dev_dbg(dev, "got and enabled clocks\n");
1872 if (strncmp(pdev->name, "s3c2440", 7) == 0) {
1873 dev_info(dev, "S3C2440: increasing FIFO to 128 bytes\n");
1874 memory.ep[1].fifo_size = S3C2440_EP_FIFO_SIZE;
1875 memory.ep[2].fifo_size = S3C2440_EP_FIFO_SIZE;
1876 memory.ep[3].fifo_size = S3C2440_EP_FIFO_SIZE;
1877 memory.ep[4].fifo_size = S3C2440_EP_FIFO_SIZE;
1880 spin_lock_init (&udc->lock);
1881 udc_info = pdev->dev.platform_data;
1883 rsrc_start = S3C2410_PA_USBDEV;
1884 rsrc_len = S3C24XX_SZ_USBDEV;
1886 if (!request_mem_region(rsrc_start, rsrc_len, gadget_name))
1889 base_addr = ioremap(rsrc_start, rsrc_len);
1895 device_initialize(&udc->gadget.dev);
1896 udc->gadget.dev.parent = &pdev->dev;
1897 udc->gadget.dev.dma_mask = pdev->dev.dma_mask;
1899 the_controller = udc;
1900 platform_set_drvdata(pdev, udc);
1902 s3c2410_udc_disable(udc);
1903 s3c2410_udc_reinit(udc);
1905 /* irq setup after old hardware state is cleaned up */
1906 retval = request_irq(IRQ_USBD, s3c2410_udc_irq,
1907 IRQF_DISABLED, gadget_name, udc);
1910 dev_err(dev, "cannot get irq %i, err %d\n", IRQ_USBD, retval);
1915 dev_dbg(dev, "got irq %i\n", IRQ_USBD);
1917 if (udc_info && udc_info->vbus_pin > 0) {
1918 retval = gpio_request(udc_info->vbus_pin, "udc vbus");
1920 dev_err(dev, "cannot claim vbus pin\n");
1924 irq = gpio_to_irq(udc_info->vbus_pin);
1926 dev_err(dev, "no irq for gpio vbus pin\n");
1927 goto err_gpio_claim;
1930 retval = request_irq(irq, s3c2410_udc_vbus_irq,
1931 IRQF_DISABLED | IRQF_TRIGGER_RISING
1932 | IRQF_TRIGGER_FALLING | IRQF_SHARED,
1936 dev_err(dev, "can't get vbus irq %d, err %d\n",
1939 goto err_gpio_claim;
1942 dev_dbg(dev, "got irq %i\n", irq);
1947 if (udc_info && !udc_info->udc_command &&
1948 gpio_is_valid(udc_info->pullup_pin)) {
1950 retval = gpio_request_one(udc_info->pullup_pin,
1951 udc_info->vbus_pin_inverted ?
1952 GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
1958 if (s3c2410_udc_debugfs_root) {
1959 udc->regs_info = debugfs_create_file("registers", S_IRUGO,
1960 s3c2410_udc_debugfs_root,
1961 udc, &s3c2410_udc_debugfs_fops);
1962 if (!udc->regs_info)
1963 dev_warn(dev, "debugfs file creation failed\n");
1966 dev_dbg(dev, "probe ok\n");
1971 if (udc_info && udc_info->vbus_pin > 0)
1972 free_irq(gpio_to_irq(udc_info->vbus_pin), udc);
1974 if (udc_info && udc_info->vbus_pin > 0)
1975 gpio_free(udc_info->vbus_pin);
1977 free_irq(IRQ_USBD, udc);
1981 release_mem_region(rsrc_start, rsrc_len);
1987 * s3c2410_udc_remove
1989 static int s3c2410_udc_remove(struct platform_device *pdev)
1991 struct s3c2410_udc *udc = platform_get_drvdata(pdev);
1994 dev_dbg(&pdev->dev, "%s()\n", __func__);
1998 debugfs_remove(udc->regs_info);
2000 if (udc_info && !udc_info->udc_command &&
2001 gpio_is_valid(udc_info->pullup_pin))
2002 gpio_free(udc_info->pullup_pin);
2004 if (udc_info && udc_info->vbus_pin > 0) {
2005 irq = gpio_to_irq(udc_info->vbus_pin);
2009 free_irq(IRQ_USBD, udc);
2012 release_mem_region(rsrc_start, rsrc_len);
2014 platform_set_drvdata(pdev, NULL);
2016 if (!IS_ERR(udc_clock) && udc_clock != NULL) {
2017 clk_disable(udc_clock);
2022 if (!IS_ERR(usb_bus_clock) && usb_bus_clock != NULL) {
2023 clk_disable(usb_bus_clock);
2024 clk_put(usb_bus_clock);
2025 usb_bus_clock = NULL;
2028 dev_dbg(&pdev->dev, "%s: remove ok\n", __func__);
2033 static int s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message)
2035 s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
2040 static int s3c2410_udc_resume(struct platform_device *pdev)
2042 s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
2047 #define s3c2410_udc_suspend NULL
2048 #define s3c2410_udc_resume NULL
2051 static struct platform_driver udc_driver_2410 = {
2053 .name = "s3c2410-usbgadget",
2054 .owner = THIS_MODULE,
2056 .probe = s3c2410_udc_probe,
2057 .remove = s3c2410_udc_remove,
2058 .suspend = s3c2410_udc_suspend,
2059 .resume = s3c2410_udc_resume,
2062 static struct platform_driver udc_driver_2440 = {
2064 .name = "s3c2440-usbgadget",
2065 .owner = THIS_MODULE,
2067 .probe = s3c2410_udc_probe,
2068 .remove = s3c2410_udc_remove,
2069 .suspend = s3c2410_udc_suspend,
2070 .resume = s3c2410_udc_resume,
2073 static int __init udc_init(void)
2077 dprintk(DEBUG_NORMAL, "%s: version %s\n", gadget_name, DRIVER_VERSION);
2079 s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name, NULL);
2080 if (IS_ERR(s3c2410_udc_debugfs_root)) {
2081 printk(KERN_ERR "%s: debugfs dir creation failed %ld\n",
2082 gadget_name, PTR_ERR(s3c2410_udc_debugfs_root));
2083 s3c2410_udc_debugfs_root = NULL;
2086 retval = platform_driver_register(&udc_driver_2410);
2090 retval = platform_driver_register(&udc_driver_2440);
2097 debugfs_remove(s3c2410_udc_debugfs_root);
2101 static void __exit udc_exit(void)
2103 platform_driver_unregister(&udc_driver_2410);
2104 platform_driver_unregister(&udc_driver_2440);
2105 debugfs_remove(s3c2410_udc_debugfs_root);
2108 EXPORT_SYMBOL(usb_gadget_unregister_driver);
2110 module_init(udc_init);
2111 module_exit(udc_exit);
2113 MODULE_AUTHOR(DRIVER_AUTHOR);
2114 MODULE_DESCRIPTION(DRIVER_DESC);
2115 MODULE_VERSION(DRIVER_VERSION);
2116 MODULE_LICENSE("GPL");
2117 MODULE_ALIAS("platform:s3c2410-usbgadget");
2118 MODULE_ALIAS("platform:s3c2440-usbgadget");