2 * linux/drivers/usb/gadget/s3c2410_udc.c
4 * Samsung S3C24xx series on-chip full speed USB device controllers
6 * Copyright (C) 2004-2007 Herbert Pötzl - Arnaud Patard
7 * Additional cleanups by Ben Dooks <ben-linux@fluff.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
15 #define pr_fmt(fmt) "s3c2410_udc: " fmt
17 #include <linux/module.h>
18 #include <linux/kernel.h>
19 #include <linux/delay.h>
20 #include <linux/ioport.h>
21 #include <linux/sched.h>
22 #include <linux/slab.h>
23 #include <linux/errno.h>
24 #include <linux/init.h>
25 #include <linux/timer.h>
26 #include <linux/list.h>
27 #include <linux/interrupt.h>
28 #include <linux/platform_device.h>
29 #include <linux/clk.h>
30 #include <linux/gpio.h>
31 #include <linux/prefetch.h>
34 #include <linux/debugfs.h>
35 #include <linux/seq_file.h>
37 #include <linux/usb.h>
38 #include <linux/usb/gadget.h>
40 #include <asm/byteorder.h>
42 #include <asm/unaligned.h>
43 #include <mach/irqs.h>
45 #include <mach/hardware.h>
47 #include <plat/regs-udc.h>
48 #include <linux/platform_data/usb-s3c2410_udc.h>
51 #include "s3c2410_udc.h"
53 #define DRIVER_DESC "S3C2410 USB Device Controller Gadget"
54 #define DRIVER_VERSION "29 Apr 2007"
55 #define DRIVER_AUTHOR "Herbert Pötzl <herbert@13thfloor.at>, " \
56 "Arnaud Patard <arnaud.patard@rtp-net.org>"
58 static const char gadget_name
[] = "s3c2410_udc";
59 static const char driver_desc
[] = DRIVER_DESC
;
61 static struct s3c2410_udc
*the_controller
;
62 static struct clk
*udc_clock
;
63 static struct clk
*usb_bus_clock
;
64 static void __iomem
*base_addr
;
65 static u64 rsrc_start
;
67 static struct dentry
*s3c2410_udc_debugfs_root
;
69 static inline u32
udc_read(u32 reg
)
71 return readb(base_addr
+ reg
);
74 static inline void udc_write(u32 value
, u32 reg
)
76 writeb(value
, base_addr
+ reg
);
79 static inline void udc_writeb(void __iomem
*base
, u32 value
, u32 reg
)
81 writeb(value
, base
+ reg
);
84 static struct s3c2410_udc_mach_info
*udc_info
;
86 /*************************** DEBUG FUNCTION ***************************/
87 #define DEBUG_NORMAL 1
88 #define DEBUG_VERBOSE 2
90 #ifdef CONFIG_USB_S3C2410_DEBUG
91 #define USB_S3C2410_DEBUG_LEVEL 0
93 static uint32_t s3c2410_ticks
= 0;
95 static int dprintk(int level
, const char *fmt
, ...)
97 static char printk_buf
[1024];
98 static long prevticks
;
99 static int invocation
;
103 if (level
> USB_S3C2410_DEBUG_LEVEL
)
106 if (s3c2410_ticks
!= prevticks
) {
107 prevticks
= s3c2410_ticks
;
111 len
= scnprintf(printk_buf
,
112 sizeof(printk_buf
), "%1lu.%02d USB: ",
113 prevticks
, invocation
++);
116 len
= vscnprintf(printk_buf
+len
,
117 sizeof(printk_buf
)-len
, fmt
, args
);
120 pr_debug("%s", printk_buf
);
124 static int dprintk(int level
, const char *fmt
, ...)
129 static int s3c2410_udc_debugfs_seq_show(struct seq_file
*m
, void *p
)
131 u32 addr_reg
, pwr_reg
, ep_int_reg
, usb_int_reg
;
132 u32 ep_int_en_reg
, usb_int_en_reg
, ep0_csr
;
133 u32 ep1_i_csr1
, ep1_i_csr2
, ep1_o_csr1
, ep1_o_csr2
;
134 u32 ep2_i_csr1
, ep2_i_csr2
, ep2_o_csr1
, ep2_o_csr2
;
136 addr_reg
= udc_read(S3C2410_UDC_FUNC_ADDR_REG
);
137 pwr_reg
= udc_read(S3C2410_UDC_PWR_REG
);
138 ep_int_reg
= udc_read(S3C2410_UDC_EP_INT_REG
);
139 usb_int_reg
= udc_read(S3C2410_UDC_USB_INT_REG
);
140 ep_int_en_reg
= udc_read(S3C2410_UDC_EP_INT_EN_REG
);
141 usb_int_en_reg
= udc_read(S3C2410_UDC_USB_INT_EN_REG
);
142 udc_write(0, S3C2410_UDC_INDEX_REG
);
143 ep0_csr
= udc_read(S3C2410_UDC_IN_CSR1_REG
);
144 udc_write(1, S3C2410_UDC_INDEX_REG
);
145 ep1_i_csr1
= udc_read(S3C2410_UDC_IN_CSR1_REG
);
146 ep1_i_csr2
= udc_read(S3C2410_UDC_IN_CSR2_REG
);
147 ep1_o_csr1
= udc_read(S3C2410_UDC_IN_CSR1_REG
);
148 ep1_o_csr2
= udc_read(S3C2410_UDC_IN_CSR2_REG
);
149 udc_write(2, S3C2410_UDC_INDEX_REG
);
150 ep2_i_csr1
= udc_read(S3C2410_UDC_IN_CSR1_REG
);
151 ep2_i_csr2
= udc_read(S3C2410_UDC_IN_CSR2_REG
);
152 ep2_o_csr1
= udc_read(S3C2410_UDC_IN_CSR1_REG
);
153 ep2_o_csr2
= udc_read(S3C2410_UDC_IN_CSR2_REG
);
155 seq_printf(m
, "FUNC_ADDR_REG : 0x%04X\n"
157 "EP_INT_REG : 0x%04X\n"
158 "USB_INT_REG : 0x%04X\n"
159 "EP_INT_EN_REG : 0x%04X\n"
160 "USB_INT_EN_REG : 0x%04X\n"
162 "EP1_I_CSR1 : 0x%04X\n"
163 "EP1_I_CSR2 : 0x%04X\n"
164 "EP1_O_CSR1 : 0x%04X\n"
165 "EP1_O_CSR2 : 0x%04X\n"
166 "EP2_I_CSR1 : 0x%04X\n"
167 "EP2_I_CSR2 : 0x%04X\n"
168 "EP2_O_CSR1 : 0x%04X\n"
169 "EP2_O_CSR2 : 0x%04X\n",
170 addr_reg
, pwr_reg
, ep_int_reg
, usb_int_reg
,
171 ep_int_en_reg
, usb_int_en_reg
, ep0_csr
,
172 ep1_i_csr1
, ep1_i_csr2
, ep1_o_csr1
, ep1_o_csr2
,
173 ep2_i_csr1
, ep2_i_csr2
, ep2_o_csr1
, ep2_o_csr2
179 static int s3c2410_udc_debugfs_fops_open(struct inode
*inode
,
182 return single_open(file
, s3c2410_udc_debugfs_seq_show
, NULL
);
185 static const struct file_operations s3c2410_udc_debugfs_fops
= {
186 .open
= s3c2410_udc_debugfs_fops_open
,
189 .release
= single_release
,
190 .owner
= THIS_MODULE
,
195 static inline void s3c2410_udc_clear_ep0_opr(void __iomem
*base
)
197 udc_writeb(base
, S3C2410_UDC_INDEX_EP0
, S3C2410_UDC_INDEX_REG
);
198 udc_writeb(base
, S3C2410_UDC_EP0_CSR_SOPKTRDY
,
199 S3C2410_UDC_EP0_CSR_REG
);
202 static inline void s3c2410_udc_clear_ep0_sst(void __iomem
*base
)
204 udc_writeb(base
, S3C2410_UDC_INDEX_EP0
, S3C2410_UDC_INDEX_REG
);
205 writeb(0x00, base
+ S3C2410_UDC_EP0_CSR_REG
);
208 static inline void s3c2410_udc_clear_ep0_se(void __iomem
*base
)
210 udc_writeb(base
, S3C2410_UDC_INDEX_EP0
, S3C2410_UDC_INDEX_REG
);
211 udc_writeb(base
, S3C2410_UDC_EP0_CSR_SSE
, S3C2410_UDC_EP0_CSR_REG
);
214 static inline void s3c2410_udc_set_ep0_ipr(void __iomem
*base
)
216 udc_writeb(base
, S3C2410_UDC_INDEX_EP0
, S3C2410_UDC_INDEX_REG
);
217 udc_writeb(base
, S3C2410_UDC_EP0_CSR_IPKRDY
, S3C2410_UDC_EP0_CSR_REG
);
220 static inline void s3c2410_udc_set_ep0_de(void __iomem
*base
)
222 udc_writeb(base
, S3C2410_UDC_INDEX_EP0
, S3C2410_UDC_INDEX_REG
);
223 udc_writeb(base
, S3C2410_UDC_EP0_CSR_DE
, S3C2410_UDC_EP0_CSR_REG
);
226 inline void s3c2410_udc_set_ep0_ss(void __iomem
*b
)
228 udc_writeb(b
, S3C2410_UDC_INDEX_EP0
, S3C2410_UDC_INDEX_REG
);
229 udc_writeb(b
, S3C2410_UDC_EP0_CSR_SENDSTL
, S3C2410_UDC_EP0_CSR_REG
);
232 static inline void s3c2410_udc_set_ep0_de_out(void __iomem
*base
)
234 udc_writeb(base
, S3C2410_UDC_INDEX_EP0
, S3C2410_UDC_INDEX_REG
);
236 udc_writeb(base
, (S3C2410_UDC_EP0_CSR_SOPKTRDY
237 | S3C2410_UDC_EP0_CSR_DE
),
238 S3C2410_UDC_EP0_CSR_REG
);
241 static inline void s3c2410_udc_set_ep0_sse_out(void __iomem
*base
)
243 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_SSE
),
246 S3C2410_UDC_EP0_CSR_REG
);
249 static inline void s3c2410_udc_set_ep0_de_in(void __iomem
*base
)
251 udc_writeb(base
, S3C2410_UDC_INDEX_EP0
, S3C2410_UDC_INDEX_REG
);
252 udc_writeb(base
, (S3C2410_UDC_EP0_CSR_IPKRDY
253 | S3C2410_UDC_EP0_CSR_DE
),
254 S3C2410_UDC_EP0_CSR_REG
);
257 /*------------------------- I/O ----------------------------------*/
262 static void s3c2410_udc_done(struct s3c2410_ep
*ep
,
263 struct s3c2410_request
*req
, int status
)
265 unsigned halted
= ep
->halted
;
267 list_del_init(&req
->queue
);
269 if (likely(req
->req
.status
== -EINPROGRESS
))
270 req
->req
.status
= status
;
272 status
= req
->req
.status
;
275 req
->req
.complete(&ep
->ep
, &req
->req
);
279 static void s3c2410_udc_nuke(struct s3c2410_udc
*udc
,
280 struct s3c2410_ep
*ep
, int status
)
283 if (&ep
->queue
== NULL
)
286 while (!list_empty(&ep
->queue
)) {
287 struct s3c2410_request
*req
;
288 req
= list_entry(ep
->queue
.next
, struct s3c2410_request
,
290 s3c2410_udc_done(ep
, req
, status
);
294 static inline void s3c2410_udc_clear_ep_state(struct s3c2410_udc
*dev
)
298 /* hardware SET_{CONFIGURATION,INTERFACE} automagic resets endpoint
299 * fifos, and pending transactions mustn't be continued in any case.
302 for (i
= 1; i
< S3C2410_ENDPOINTS
; i
++)
303 s3c2410_udc_nuke(dev
, &dev
->ep
[i
], -ECONNABORTED
);
306 static inline int s3c2410_udc_fifo_count_out(void)
310 tmp
= udc_read(S3C2410_UDC_OUT_FIFO_CNT2_REG
) << 8;
311 tmp
|= udc_read(S3C2410_UDC_OUT_FIFO_CNT1_REG
);
316 * s3c2410_udc_write_packet
318 static inline int s3c2410_udc_write_packet(int fifo
,
319 struct s3c2410_request
*req
,
322 unsigned len
= min(req
->req
.length
- req
->req
.actual
, max
);
323 u8
*buf
= req
->req
.buf
+ req
->req
.actual
;
327 dprintk(DEBUG_VERBOSE
, "%s %d %d %d %d\n", __func__
,
328 req
->req
.actual
, req
->req
.length
, len
, req
->req
.actual
+ len
);
330 req
->req
.actual
+= len
;
333 writesb(base_addr
+ fifo
, buf
, len
);
338 * s3c2410_udc_write_fifo
340 * return: 0 = still running, 1 = completed, negative = errno
342 static int s3c2410_udc_write_fifo(struct s3c2410_ep
*ep
,
343 struct s3c2410_request
*req
)
351 idx
= ep
->bEndpointAddress
& 0x7F;
356 fifo_reg
= S3C2410_UDC_EP0_FIFO_REG
;
359 fifo_reg
= S3C2410_UDC_EP1_FIFO_REG
;
362 fifo_reg
= S3C2410_UDC_EP2_FIFO_REG
;
365 fifo_reg
= S3C2410_UDC_EP3_FIFO_REG
;
368 fifo_reg
= S3C2410_UDC_EP4_FIFO_REG
;
372 count
= s3c2410_udc_write_packet(fifo_reg
, req
, ep
->ep
.maxpacket
);
374 /* last packet is often short (sometimes a zlp) */
375 if (count
!= ep
->ep
.maxpacket
)
377 else if (req
->req
.length
!= req
->req
.actual
|| req
->req
.zero
)
382 /* Only ep0 debug messages are interesting */
384 dprintk(DEBUG_NORMAL
,
385 "Written ep%d %d.%d of %d b [last %d,z %d]\n",
386 idx
, count
, req
->req
.actual
, req
->req
.length
,
387 is_last
, req
->req
.zero
);
390 /* The order is important. It prevents sending 2 packets
391 * at the same time */
394 /* Reset signal => no need to say 'data sent' */
395 if (!(udc_read(S3C2410_UDC_USB_INT_REG
)
396 & S3C2410_UDC_USBINT_RESET
))
397 s3c2410_udc_set_ep0_de_in(base_addr
);
398 ep
->dev
->ep0state
= EP0_IDLE
;
400 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
401 ep_csr
= udc_read(S3C2410_UDC_IN_CSR1_REG
);
402 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
403 udc_write(ep_csr
| S3C2410_UDC_ICSR1_PKTRDY
,
404 S3C2410_UDC_IN_CSR1_REG
);
407 s3c2410_udc_done(ep
, req
, 0);
411 /* Reset signal => no need to say 'data sent' */
412 if (!(udc_read(S3C2410_UDC_USB_INT_REG
)
413 & S3C2410_UDC_USBINT_RESET
))
414 s3c2410_udc_set_ep0_ipr(base_addr
);
416 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
417 ep_csr
= udc_read(S3C2410_UDC_IN_CSR1_REG
);
418 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
419 udc_write(ep_csr
| S3C2410_UDC_ICSR1_PKTRDY
,
420 S3C2410_UDC_IN_CSR1_REG
);
427 static inline int s3c2410_udc_read_packet(int fifo
, u8
*buf
,
428 struct s3c2410_request
*req
, unsigned avail
)
432 len
= min(req
->req
.length
- req
->req
.actual
, avail
);
433 req
->req
.actual
+= len
;
435 readsb(fifo
+ base_addr
, buf
, len
);
440 * return: 0 = still running, 1 = queue empty, negative = errno
442 static int s3c2410_udc_read_fifo(struct s3c2410_ep
*ep
,
443 struct s3c2410_request
*req
)
447 unsigned bufferspace
;
454 idx
= ep
->bEndpointAddress
& 0x7F;
460 fifo_reg
= S3C2410_UDC_EP0_FIFO_REG
;
463 fifo_reg
= S3C2410_UDC_EP1_FIFO_REG
;
466 fifo_reg
= S3C2410_UDC_EP2_FIFO_REG
;
469 fifo_reg
= S3C2410_UDC_EP3_FIFO_REG
;
472 fifo_reg
= S3C2410_UDC_EP4_FIFO_REG
;
476 if (!req
->req
.length
)
479 buf
= req
->req
.buf
+ req
->req
.actual
;
480 bufferspace
= req
->req
.length
- req
->req
.actual
;
482 dprintk(DEBUG_NORMAL
, "%s: buffer full!\n", __func__
);
486 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
488 fifo_count
= s3c2410_udc_fifo_count_out();
489 dprintk(DEBUG_NORMAL
, "%s fifo count : %d\n", __func__
, fifo_count
);
491 if (fifo_count
> ep
->ep
.maxpacket
)
492 avail
= ep
->ep
.maxpacket
;
496 fifo_count
= s3c2410_udc_read_packet(fifo_reg
, buf
, req
, avail
);
498 /* checking this with ep0 is not accurate as we already
499 * read a control request
501 if (idx
!= 0 && fifo_count
< ep
->ep
.maxpacket
) {
503 /* overflowed this request? flush extra data */
504 if (fifo_count
!= avail
)
505 req
->req
.status
= -EOVERFLOW
;
507 is_last
= (req
->req
.length
<= req
->req
.actual
) ? 1 : 0;
510 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
511 fifo_count
= s3c2410_udc_fifo_count_out();
513 /* Only ep0 debug messages are interesting */
515 dprintk(DEBUG_VERBOSE
, "%s fifo count : %d [last %d]\n",
516 __func__
, fifo_count
, is_last
);
520 s3c2410_udc_set_ep0_de_out(base_addr
);
521 ep
->dev
->ep0state
= EP0_IDLE
;
523 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
524 ep_csr
= udc_read(S3C2410_UDC_OUT_CSR1_REG
);
525 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
526 udc_write(ep_csr
& ~S3C2410_UDC_OCSR1_PKTRDY
,
527 S3C2410_UDC_OUT_CSR1_REG
);
530 s3c2410_udc_done(ep
, req
, 0);
533 s3c2410_udc_clear_ep0_opr(base_addr
);
535 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
536 ep_csr
= udc_read(S3C2410_UDC_OUT_CSR1_REG
);
537 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
538 udc_write(ep_csr
& ~S3C2410_UDC_OCSR1_PKTRDY
,
539 S3C2410_UDC_OUT_CSR1_REG
);
546 static int s3c2410_udc_read_fifo_crq(struct usb_ctrlrequest
*crq
)
548 unsigned char *outbuf
= (unsigned char *)crq
;
551 udc_write(0, S3C2410_UDC_INDEX_REG
);
553 bytes_read
= s3c2410_udc_fifo_count_out();
555 dprintk(DEBUG_NORMAL
, "%s: fifo_count=%d\n", __func__
, bytes_read
);
557 if (bytes_read
> sizeof(struct usb_ctrlrequest
))
558 bytes_read
= sizeof(struct usb_ctrlrequest
);
560 readsb(S3C2410_UDC_EP0_FIFO_REG
+ base_addr
, outbuf
, bytes_read
);
562 dprintk(DEBUG_VERBOSE
, "%s: len=%d %02x:%02x {%x,%x,%x}\n", __func__
,
563 bytes_read
, crq
->bRequest
, crq
->bRequestType
,
564 crq
->wValue
, crq
->wIndex
, crq
->wLength
);
569 static int s3c2410_udc_get_status(struct s3c2410_udc
*dev
,
570 struct usb_ctrlrequest
*crq
)
573 u8 ep_num
= crq
->wIndex
& 0x7F;
574 u8 is_in
= crq
->wIndex
& USB_DIR_IN
;
576 switch (crq
->bRequestType
& USB_RECIP_MASK
) {
577 case USB_RECIP_INTERFACE
:
580 case USB_RECIP_DEVICE
:
581 status
= dev
->devstatus
;
584 case USB_RECIP_ENDPOINT
:
585 if (ep_num
> 4 || crq
->wLength
> 2)
589 udc_write(0, S3C2410_UDC_INDEX_REG
);
590 status
= udc_read(S3C2410_UDC_IN_CSR1_REG
);
591 status
= status
& S3C2410_UDC_EP0_CSR_SENDSTL
;
593 udc_write(ep_num
, S3C2410_UDC_INDEX_REG
);
595 status
= udc_read(S3C2410_UDC_IN_CSR1_REG
);
596 status
= status
& S3C2410_UDC_ICSR1_SENDSTL
;
598 status
= udc_read(S3C2410_UDC_OUT_CSR1_REG
);
599 status
= status
& S3C2410_UDC_OCSR1_SENDSTL
;
603 status
= status
? 1 : 0;
610 /* Seems to be needed to get it working. ouch :( */
612 udc_write(status
& 0xFF, S3C2410_UDC_EP0_FIFO_REG
);
613 udc_write(status
>> 8, S3C2410_UDC_EP0_FIFO_REG
);
614 s3c2410_udc_set_ep0_de_in(base_addr
);
618 /*------------------------- usb state machine -------------------------------*/
619 static int s3c2410_udc_set_halt(struct usb_ep
*_ep
, int value
);
621 static void s3c2410_udc_handle_ep0_idle(struct s3c2410_udc
*dev
,
622 struct s3c2410_ep
*ep
,
623 struct usb_ctrlrequest
*crq
,
628 /* start control request? */
629 if (!(ep0csr
& S3C2410_UDC_EP0_CSR_OPKRDY
))
632 s3c2410_udc_nuke(dev
, ep
, -EPROTO
);
634 len
= s3c2410_udc_read_fifo_crq(crq
);
635 if (len
!= sizeof(*crq
)) {
636 dprintk(DEBUG_NORMAL
, "setup begin: fifo READ ERROR"
637 " wanted %d bytes got %d. Stalling out...\n",
639 s3c2410_udc_set_ep0_ss(base_addr
);
643 dprintk(DEBUG_NORMAL
, "bRequest = %d bRequestType %d wLength = %d\n",
644 crq
->bRequest
, crq
->bRequestType
, crq
->wLength
);
646 /* cope with automagic for some standard requests. */
647 dev
->req_std
= (crq
->bRequestType
& USB_TYPE_MASK
)
648 == USB_TYPE_STANDARD
;
650 dev
->req_pending
= 1;
652 switch (crq
->bRequest
) {
653 case USB_REQ_SET_CONFIGURATION
:
654 dprintk(DEBUG_NORMAL
, "USB_REQ_SET_CONFIGURATION ...\n");
656 if (crq
->bRequestType
== USB_RECIP_DEVICE
) {
658 s3c2410_udc_set_ep0_de_out(base_addr
);
662 case USB_REQ_SET_INTERFACE
:
663 dprintk(DEBUG_NORMAL
, "USB_REQ_SET_INTERFACE ...\n");
665 if (crq
->bRequestType
== USB_RECIP_INTERFACE
) {
667 s3c2410_udc_set_ep0_de_out(base_addr
);
671 case USB_REQ_SET_ADDRESS
:
672 dprintk(DEBUG_NORMAL
, "USB_REQ_SET_ADDRESS ...\n");
674 if (crq
->bRequestType
== USB_RECIP_DEVICE
) {
675 tmp
= crq
->wValue
& 0x7F;
677 udc_write((tmp
| S3C2410_UDC_FUNCADDR_UPDATE
),
678 S3C2410_UDC_FUNC_ADDR_REG
);
679 s3c2410_udc_set_ep0_de_out(base_addr
);
684 case USB_REQ_GET_STATUS
:
685 dprintk(DEBUG_NORMAL
, "USB_REQ_GET_STATUS ...\n");
686 s3c2410_udc_clear_ep0_opr(base_addr
);
689 if (!s3c2410_udc_get_status(dev
, crq
))
694 case USB_REQ_CLEAR_FEATURE
:
695 s3c2410_udc_clear_ep0_opr(base_addr
);
697 if (crq
->bRequestType
!= USB_RECIP_ENDPOINT
)
700 if (crq
->wValue
!= USB_ENDPOINT_HALT
|| crq
->wLength
!= 0)
703 s3c2410_udc_set_halt(&dev
->ep
[crq
->wIndex
& 0x7f].ep
, 0);
704 s3c2410_udc_set_ep0_de_out(base_addr
);
707 case USB_REQ_SET_FEATURE
:
708 s3c2410_udc_clear_ep0_opr(base_addr
);
710 if (crq
->bRequestType
!= USB_RECIP_ENDPOINT
)
713 if (crq
->wValue
!= USB_ENDPOINT_HALT
|| crq
->wLength
!= 0)
716 s3c2410_udc_set_halt(&dev
->ep
[crq
->wIndex
& 0x7f].ep
, 1);
717 s3c2410_udc_set_ep0_de_out(base_addr
);
721 s3c2410_udc_clear_ep0_opr(base_addr
);
725 if (crq
->bRequestType
& USB_DIR_IN
)
726 dev
->ep0state
= EP0_IN_DATA_PHASE
;
728 dev
->ep0state
= EP0_OUT_DATA_PHASE
;
733 /* deliver the request to the gadget driver */
734 ret
= dev
->driver
->setup(&dev
->gadget
, crq
);
736 if (dev
->req_config
) {
737 dprintk(DEBUG_NORMAL
, "config change %02x fail %d?\n",
742 if (ret
== -EOPNOTSUPP
)
743 dprintk(DEBUG_NORMAL
, "Operation not supported\n");
745 dprintk(DEBUG_NORMAL
,
746 "dev->driver->setup failed. (%d)\n", ret
);
749 s3c2410_udc_set_ep0_ss(base_addr
);
750 s3c2410_udc_set_ep0_de_out(base_addr
);
751 dev
->ep0state
= EP0_IDLE
;
752 /* deferred i/o == no response yet */
753 } else if (dev
->req_pending
) {
754 dprintk(DEBUG_VERBOSE
, "dev->req_pending... what now?\n");
755 dev
->req_pending
= 0;
758 dprintk(DEBUG_VERBOSE
, "ep0state %s\n", ep0states
[dev
->ep0state
]);
761 static void s3c2410_udc_handle_ep0(struct s3c2410_udc
*dev
)
764 struct s3c2410_ep
*ep
= &dev
->ep
[0];
765 struct s3c2410_request
*req
;
766 struct usb_ctrlrequest crq
;
768 if (list_empty(&ep
->queue
))
771 req
= list_entry(ep
->queue
.next
, struct s3c2410_request
, queue
);
773 /* We make the assumption that S3C2410_UDC_IN_CSR1_REG equal to
774 * S3C2410_UDC_EP0_CSR_REG when index is zero */
776 udc_write(0, S3C2410_UDC_INDEX_REG
);
777 ep0csr
= udc_read(S3C2410_UDC_IN_CSR1_REG
);
779 dprintk(DEBUG_NORMAL
, "ep0csr %x ep0state %s\n",
780 ep0csr
, ep0states
[dev
->ep0state
]);
782 /* clear stall status */
783 if (ep0csr
& S3C2410_UDC_EP0_CSR_SENTSTL
) {
784 s3c2410_udc_nuke(dev
, ep
, -EPIPE
);
785 dprintk(DEBUG_NORMAL
, "... clear SENT_STALL ...\n");
786 s3c2410_udc_clear_ep0_sst(base_addr
);
787 dev
->ep0state
= EP0_IDLE
;
791 /* clear setup end */
792 if (ep0csr
& S3C2410_UDC_EP0_CSR_SE
) {
793 dprintk(DEBUG_NORMAL
, "... serviced SETUP_END ...\n");
794 s3c2410_udc_nuke(dev
, ep
, 0);
795 s3c2410_udc_clear_ep0_se(base_addr
);
796 dev
->ep0state
= EP0_IDLE
;
799 switch (dev
->ep0state
) {
801 s3c2410_udc_handle_ep0_idle(dev
, ep
, &crq
, ep0csr
);
804 case EP0_IN_DATA_PHASE
: /* GET_DESCRIPTOR etc */
805 dprintk(DEBUG_NORMAL
, "EP0_IN_DATA_PHASE ... what now?\n");
806 if (!(ep0csr
& S3C2410_UDC_EP0_CSR_IPKRDY
) && req
)
807 s3c2410_udc_write_fifo(ep
, req
);
810 case EP0_OUT_DATA_PHASE
: /* SET_DESCRIPTOR etc */
811 dprintk(DEBUG_NORMAL
, "EP0_OUT_DATA_PHASE ... what now?\n");
812 if ((ep0csr
& S3C2410_UDC_EP0_CSR_OPKRDY
) && req
)
813 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
);
864 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
865 ep_csr1
= udc_read(S3C2410_UDC_OUT_CSR1_REG
);
866 dprintk(DEBUG_VERBOSE
, "ep%01d rd csr:%02x\n", idx
, ep_csr1
);
868 if (ep_csr1
& S3C2410_UDC_OCSR1_SENTSTL
) {
869 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
870 udc_write(ep_csr1
& ~S3C2410_UDC_OCSR1_SENTSTL
,
871 S3C2410_UDC_OUT_CSR1_REG
);
875 if ((ep_csr1
& S3C2410_UDC_OCSR1_PKTRDY
) && req
)
876 s3c2410_udc_read_fifo(ep
, req
);
880 #include <mach/regs-irq.h>
883 * s3c2410_udc_irq - interrupt handler
885 static irqreturn_t
s3c2410_udc_irq(int dummy
, void *_dev
)
887 struct s3c2410_udc
*dev
= _dev
;
896 spin_lock_irqsave(&dev
->lock
, flags
);
898 /* Driver connected ? */
900 /* Clear interrupts */
901 udc_write(udc_read(S3C2410_UDC_USB_INT_REG
),
902 S3C2410_UDC_USB_INT_REG
);
903 udc_write(udc_read(S3C2410_UDC_EP_INT_REG
),
904 S3C2410_UDC_EP_INT_REG
);
908 idx
= udc_read(S3C2410_UDC_INDEX_REG
);
910 /* Read status registers */
911 usb_status
= udc_read(S3C2410_UDC_USB_INT_REG
);
912 usbd_status
= udc_read(S3C2410_UDC_EP_INT_REG
);
913 pwr_reg
= udc_read(S3C2410_UDC_PWR_REG
);
915 udc_writeb(base_addr
, S3C2410_UDC_INDEX_EP0
, S3C2410_UDC_INDEX_REG
);
916 ep0csr
= udc_read(S3C2410_UDC_IN_CSR1_REG
);
918 dprintk(DEBUG_NORMAL
, "usbs=%02x, usbds=%02x, pwr=%02x ep0csr=%02x\n",
919 usb_status
, usbd_status
, pwr_reg
, ep0csr
);
922 * Now, handle interrupts. There's two types :
923 * - Reset, Resume, Suspend coming -> usb_int_reg
928 if (usb_status
& S3C2410_UDC_USBINT_RESET
) {
929 /* two kind of reset :
930 * - reset start -> pwr reg = 8
931 * - reset end -> pwr reg = 0
933 dprintk(DEBUG_NORMAL
, "USB reset csr %x pwr %x\n",
936 dev
->gadget
.speed
= USB_SPEED_UNKNOWN
;
937 udc_write(0x00, S3C2410_UDC_INDEX_REG
);
938 udc_write((dev
->ep
[0].ep
.maxpacket
& 0x7ff) >> 3,
939 S3C2410_UDC_MAXP_REG
);
942 dev
->ep0state
= EP0_IDLE
;
943 dev
->gadget
.speed
= USB_SPEED_FULL
;
945 /* clear interrupt */
946 udc_write(S3C2410_UDC_USBINT_RESET
,
947 S3C2410_UDC_USB_INT_REG
);
949 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
950 spin_unlock_irqrestore(&dev
->lock
, flags
);
955 if (usb_status
& S3C2410_UDC_USBINT_RESUME
) {
956 dprintk(DEBUG_NORMAL
, "USB resume\n");
958 /* clear interrupt */
959 udc_write(S3C2410_UDC_USBINT_RESUME
,
960 S3C2410_UDC_USB_INT_REG
);
962 if (dev
->gadget
.speed
!= USB_SPEED_UNKNOWN
964 && dev
->driver
->resume
)
965 dev
->driver
->resume(&dev
->gadget
);
969 if (usb_status
& S3C2410_UDC_USBINT_SUSPEND
) {
970 dprintk(DEBUG_NORMAL
, "USB suspend\n");
972 /* clear interrupt */
973 udc_write(S3C2410_UDC_USBINT_SUSPEND
,
974 S3C2410_UDC_USB_INT_REG
);
976 if (dev
->gadget
.speed
!= USB_SPEED_UNKNOWN
978 && dev
->driver
->suspend
)
979 dev
->driver
->suspend(&dev
->gadget
);
981 dev
->ep0state
= EP0_IDLE
;
985 /* control traffic */
986 /* check on ep0csr != 0 is not a good idea as clearing in_pkt_ready
987 * generate an interrupt
989 if (usbd_status
& S3C2410_UDC_INT_EP0
) {
990 dprintk(DEBUG_VERBOSE
, "USB ep0 irq\n");
991 /* Clear the interrupt bit by setting it to 1 */
992 udc_write(S3C2410_UDC_INT_EP0
, S3C2410_UDC_EP_INT_REG
);
993 s3c2410_udc_handle_ep0(dev
);
996 /* endpoint data transfers */
997 for (i
= 1; i
< S3C2410_ENDPOINTS
; i
++) {
999 if (usbd_status
& tmp
) {
1000 dprintk(DEBUG_VERBOSE
, "USB ep%d irq\n", i
);
1002 /* Clear the interrupt bit by setting it to 1 */
1003 udc_write(tmp
, S3C2410_UDC_EP_INT_REG
);
1004 s3c2410_udc_handle_ep(&dev
->ep
[i
]);
1008 /* what else causes this interrupt? a receive! who is it? */
1009 if (!usb_status
&& !usbd_status
&& !pwr_reg
&& !ep0csr
) {
1010 for (i
= 1; i
< S3C2410_ENDPOINTS
; i
++) {
1011 idx2
= udc_read(S3C2410_UDC_INDEX_REG
);
1012 udc_write(i
, S3C2410_UDC_INDEX_REG
);
1014 if (udc_read(S3C2410_UDC_OUT_CSR1_REG
) & 0x1)
1015 s3c2410_udc_handle_ep(&dev
->ep
[i
]);
1018 udc_write(idx2
, S3C2410_UDC_INDEX_REG
);
1022 dprintk(DEBUG_VERBOSE
, "irq: %d s3c2410_udc_done.\n", IRQ_USBD
);
1024 /* Restore old index */
1025 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
1027 spin_unlock_irqrestore(&dev
->lock
, flags
);
1031 /*------------------------- s3c2410_ep_ops ----------------------------------*/
1033 static inline struct s3c2410_ep
*to_s3c2410_ep(struct usb_ep
*ep
)
1035 return container_of(ep
, struct s3c2410_ep
, ep
);
1038 static inline struct s3c2410_udc
*to_s3c2410_udc(struct usb_gadget
*gadget
)
1040 return container_of(gadget
, struct s3c2410_udc
, gadget
);
1043 static inline struct s3c2410_request
*to_s3c2410_req(struct usb_request
*req
)
1045 return container_of(req
, struct s3c2410_request
, req
);
1049 * s3c2410_udc_ep_enable
1051 static int s3c2410_udc_ep_enable(struct usb_ep
*_ep
,
1052 const struct usb_endpoint_descriptor
*desc
)
1054 struct s3c2410_udc
*dev
;
1055 struct s3c2410_ep
*ep
;
1057 unsigned long flags
;
1061 ep
= to_s3c2410_ep(_ep
);
1064 || _ep
->name
== ep0name
1065 || desc
->bDescriptorType
!= USB_DT_ENDPOINT
)
1069 if (!dev
->driver
|| dev
->gadget
.speed
== USB_SPEED_UNKNOWN
)
1072 max
= usb_endpoint_maxp(desc
) & 0x1fff;
1074 local_irq_save(flags
);
1075 _ep
->maxpacket
= max
& 0x7ff;
1078 ep
->bEndpointAddress
= desc
->bEndpointAddress
;
1080 /* set max packet */
1081 udc_write(ep
->num
, S3C2410_UDC_INDEX_REG
);
1082 udc_write(max
>> 3, S3C2410_UDC_MAXP_REG
);
1084 /* set type, direction, address; reset fifo counters */
1085 if (desc
->bEndpointAddress
& USB_DIR_IN
) {
1086 csr1
= S3C2410_UDC_ICSR1_FFLUSH
|S3C2410_UDC_ICSR1_CLRDT
;
1087 csr2
= S3C2410_UDC_ICSR2_MODEIN
|S3C2410_UDC_ICSR2_DMAIEN
;
1089 udc_write(ep
->num
, S3C2410_UDC_INDEX_REG
);
1090 udc_write(csr1
, S3C2410_UDC_IN_CSR1_REG
);
1091 udc_write(ep
->num
, S3C2410_UDC_INDEX_REG
);
1092 udc_write(csr2
, S3C2410_UDC_IN_CSR2_REG
);
1094 /* don't flush in fifo or it will cause endpoint interrupt */
1095 csr1
= S3C2410_UDC_ICSR1_CLRDT
;
1096 csr2
= S3C2410_UDC_ICSR2_DMAIEN
;
1098 udc_write(ep
->num
, S3C2410_UDC_INDEX_REG
);
1099 udc_write(csr1
, S3C2410_UDC_IN_CSR1_REG
);
1100 udc_write(ep
->num
, S3C2410_UDC_INDEX_REG
);
1101 udc_write(csr2
, S3C2410_UDC_IN_CSR2_REG
);
1103 csr1
= S3C2410_UDC_OCSR1_FFLUSH
| S3C2410_UDC_OCSR1_CLRDT
;
1104 csr2
= S3C2410_UDC_OCSR2_DMAIEN
;
1106 udc_write(ep
->num
, S3C2410_UDC_INDEX_REG
);
1107 udc_write(csr1
, S3C2410_UDC_OUT_CSR1_REG
);
1108 udc_write(ep
->num
, S3C2410_UDC_INDEX_REG
);
1109 udc_write(csr2
, S3C2410_UDC_OUT_CSR2_REG
);
1113 int_en_reg
= udc_read(S3C2410_UDC_EP_INT_EN_REG
);
1114 udc_write(int_en_reg
| (1 << ep
->num
), S3C2410_UDC_EP_INT_EN_REG
);
1116 /* print some debug message */
1117 tmp
= desc
->bEndpointAddress
;
1118 dprintk(DEBUG_NORMAL
, "enable %s(%d) ep%x%s-blk max %02x\n",
1119 _ep
->name
, ep
->num
, tmp
,
1120 desc
->bEndpointAddress
& USB_DIR_IN
? "in" : "out", max
);
1122 local_irq_restore(flags
);
1123 s3c2410_udc_set_halt(_ep
, 0);
1129 * s3c2410_udc_ep_disable
1131 static int s3c2410_udc_ep_disable(struct usb_ep
*_ep
)
1133 struct s3c2410_ep
*ep
= to_s3c2410_ep(_ep
);
1134 unsigned long flags
;
1137 if (!_ep
|| !ep
->ep
.desc
) {
1138 dprintk(DEBUG_NORMAL
, "%s not enabled\n",
1139 _ep
? ep
->ep
.name
: NULL
);
1143 local_irq_save(flags
);
1145 dprintk(DEBUG_NORMAL
, "ep_disable: %s\n", _ep
->name
);
1150 s3c2410_udc_nuke(ep
->dev
, ep
, -ESHUTDOWN
);
1153 int_en_reg
= udc_read(S3C2410_UDC_EP_INT_EN_REG
);
1154 udc_write(int_en_reg
& ~(1<<ep
->num
), S3C2410_UDC_EP_INT_EN_REG
);
1156 local_irq_restore(flags
);
1158 dprintk(DEBUG_NORMAL
, "%s disabled\n", _ep
->name
);
1164 * s3c2410_udc_alloc_request
1166 static struct usb_request
*
1167 s3c2410_udc_alloc_request(struct usb_ep
*_ep
, gfp_t mem_flags
)
1169 struct s3c2410_request
*req
;
1171 dprintk(DEBUG_VERBOSE
, "%s(%p,%d)\n", __func__
, _ep
, mem_flags
);
1176 req
= kzalloc(sizeof(struct s3c2410_request
), mem_flags
);
1180 INIT_LIST_HEAD(&req
->queue
);
1185 * s3c2410_udc_free_request
1188 s3c2410_udc_free_request(struct usb_ep
*_ep
, struct usb_request
*_req
)
1190 struct s3c2410_ep
*ep
= to_s3c2410_ep(_ep
);
1191 struct s3c2410_request
*req
= to_s3c2410_req(_req
);
1193 dprintk(DEBUG_VERBOSE
, "%s(%p,%p)\n", __func__
, _ep
, _req
);
1195 if (!ep
|| !_req
|| (!ep
->ep
.desc
&& _ep
->name
!= ep0name
))
1198 WARN_ON(!list_empty(&req
->queue
));
1205 static int s3c2410_udc_queue(struct usb_ep
*_ep
, struct usb_request
*_req
,
1208 struct s3c2410_request
*req
= to_s3c2410_req(_req
);
1209 struct s3c2410_ep
*ep
= to_s3c2410_ep(_ep
);
1210 struct s3c2410_udc
*dev
;
1213 unsigned long flags
;
1215 if (unlikely(!_ep
|| (!ep
->ep
.desc
&& ep
->ep
.name
!= ep0name
))) {
1216 dprintk(DEBUG_NORMAL
, "%s: invalid args\n", __func__
);
1221 if (unlikely(!dev
->driver
1222 || dev
->gadget
.speed
== USB_SPEED_UNKNOWN
)) {
1226 local_irq_save(flags
);
1228 if (unlikely(!_req
|| !_req
->complete
1229 || !_req
->buf
|| !list_empty(&req
->queue
))) {
1231 dprintk(DEBUG_NORMAL
, "%s: 1 X X X\n", __func__
);
1233 dprintk(DEBUG_NORMAL
, "%s: 0 %01d %01d %01d\n",
1234 __func__
, !_req
->complete
, !_req
->buf
,
1235 !list_empty(&req
->queue
));
1238 local_irq_restore(flags
);
1242 _req
->status
= -EINPROGRESS
;
1245 dprintk(DEBUG_VERBOSE
, "%s: ep%x len %d\n",
1246 __func__
, ep
->bEndpointAddress
, _req
->length
);
1248 if (ep
->bEndpointAddress
) {
1249 udc_write(ep
->bEndpointAddress
& 0x7F, S3C2410_UDC_INDEX_REG
);
1251 ep_csr
= udc_read((ep
->bEndpointAddress
& USB_DIR_IN
)
1252 ? S3C2410_UDC_IN_CSR1_REG
1253 : S3C2410_UDC_OUT_CSR1_REG
);
1254 fifo_count
= s3c2410_udc_fifo_count_out();
1256 udc_write(0, S3C2410_UDC_INDEX_REG
);
1257 ep_csr
= udc_read(S3C2410_UDC_IN_CSR1_REG
);
1258 fifo_count
= s3c2410_udc_fifo_count_out();
1261 /* kickstart this i/o queue? */
1262 if (list_empty(&ep
->queue
) && !ep
->halted
) {
1263 if (ep
->bEndpointAddress
== 0 /* ep0 */) {
1264 switch (dev
->ep0state
) {
1265 case EP0_IN_DATA_PHASE
:
1266 if (!(ep_csr
&S3C2410_UDC_EP0_CSR_IPKRDY
)
1267 && s3c2410_udc_write_fifo(ep
,
1269 dev
->ep0state
= EP0_IDLE
;
1274 case EP0_OUT_DATA_PHASE
:
1276 || ((ep_csr
& S3C2410_UDC_OCSR1_PKTRDY
)
1277 && s3c2410_udc_read_fifo(ep
,
1279 dev
->ep0state
= EP0_IDLE
;
1285 local_irq_restore(flags
);
1288 } else if ((ep
->bEndpointAddress
& USB_DIR_IN
) != 0
1289 && (!(ep_csr
&S3C2410_UDC_OCSR1_PKTRDY
))
1290 && s3c2410_udc_write_fifo(ep
, req
)) {
1292 } else if ((ep_csr
& S3C2410_UDC_OCSR1_PKTRDY
)
1294 && s3c2410_udc_read_fifo(ep
, req
)) {
1299 /* pio or dma irq handler advances the queue. */
1301 list_add_tail(&req
->queue
, &ep
->queue
);
1303 local_irq_restore(flags
);
1305 dprintk(DEBUG_VERBOSE
, "%s ok\n", __func__
);
1310 * s3c2410_udc_dequeue
1312 static int s3c2410_udc_dequeue(struct usb_ep
*_ep
, struct usb_request
*_req
)
1314 struct s3c2410_ep
*ep
= to_s3c2410_ep(_ep
);
1315 struct s3c2410_udc
*udc
;
1316 int retval
= -EINVAL
;
1317 unsigned long flags
;
1318 struct s3c2410_request
*req
= NULL
;
1320 dprintk(DEBUG_VERBOSE
, "%s(%p,%p)\n", __func__
, _ep
, _req
);
1322 if (!the_controller
->driver
)
1328 udc
= to_s3c2410_udc(ep
->gadget
);
1330 local_irq_save(flags
);
1332 list_for_each_entry(req
, &ep
->queue
, queue
) {
1333 if (&req
->req
== _req
) {
1334 list_del_init(&req
->queue
);
1335 _req
->status
= -ECONNRESET
;
1342 dprintk(DEBUG_VERBOSE
,
1343 "dequeued req %p from %s, len %d buf %p\n",
1344 req
, _ep
->name
, _req
->length
, _req
->buf
);
1346 s3c2410_udc_done(ep
, req
, -ECONNRESET
);
1349 local_irq_restore(flags
);
1354 * s3c2410_udc_set_halt
1356 static int s3c2410_udc_set_halt(struct usb_ep
*_ep
, int value
)
1358 struct s3c2410_ep
*ep
= to_s3c2410_ep(_ep
);
1360 unsigned long flags
;
1363 if (unlikely(!_ep
|| (!ep
->ep
.desc
&& ep
->ep
.name
!= ep0name
))) {
1364 dprintk(DEBUG_NORMAL
, "%s: inval 2\n", __func__
);
1368 local_irq_save(flags
);
1370 idx
= ep
->bEndpointAddress
& 0x7F;
1373 s3c2410_udc_set_ep0_ss(base_addr
);
1374 s3c2410_udc_set_ep0_de_out(base_addr
);
1376 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
1377 ep_csr
= udc_read((ep
->bEndpointAddress
& USB_DIR_IN
)
1378 ? S3C2410_UDC_IN_CSR1_REG
1379 : S3C2410_UDC_OUT_CSR1_REG
);
1381 if ((ep
->bEndpointAddress
& USB_DIR_IN
) != 0) {
1383 udc_write(ep_csr
| S3C2410_UDC_ICSR1_SENDSTL
,
1384 S3C2410_UDC_IN_CSR1_REG
);
1386 ep_csr
&= ~S3C2410_UDC_ICSR1_SENDSTL
;
1387 udc_write(ep_csr
, S3C2410_UDC_IN_CSR1_REG
);
1388 ep_csr
|= S3C2410_UDC_ICSR1_CLRDT
;
1389 udc_write(ep_csr
, S3C2410_UDC_IN_CSR1_REG
);
1393 udc_write(ep_csr
| S3C2410_UDC_OCSR1_SENDSTL
,
1394 S3C2410_UDC_OUT_CSR1_REG
);
1396 ep_csr
&= ~S3C2410_UDC_OCSR1_SENDSTL
;
1397 udc_write(ep_csr
, S3C2410_UDC_OUT_CSR1_REG
);
1398 ep_csr
|= S3C2410_UDC_OCSR1_CLRDT
;
1399 udc_write(ep_csr
, S3C2410_UDC_OUT_CSR1_REG
);
1404 ep
->halted
= value
? 1 : 0;
1405 local_irq_restore(flags
);
1410 static const struct usb_ep_ops s3c2410_ep_ops
= {
1411 .enable
= s3c2410_udc_ep_enable
,
1412 .disable
= s3c2410_udc_ep_disable
,
1414 .alloc_request
= s3c2410_udc_alloc_request
,
1415 .free_request
= s3c2410_udc_free_request
,
1417 .queue
= s3c2410_udc_queue
,
1418 .dequeue
= s3c2410_udc_dequeue
,
1420 .set_halt
= s3c2410_udc_set_halt
,
1423 /*------------------------- usb_gadget_ops ----------------------------------*/
1426 * s3c2410_udc_get_frame
1428 static int s3c2410_udc_get_frame(struct usb_gadget
*_gadget
)
1432 dprintk(DEBUG_VERBOSE
, "%s()\n", __func__
);
1434 tmp
= udc_read(S3C2410_UDC_FRAME_NUM2_REG
) << 8;
1435 tmp
|= udc_read(S3C2410_UDC_FRAME_NUM1_REG
);
1440 * s3c2410_udc_wakeup
1442 static int s3c2410_udc_wakeup(struct usb_gadget
*_gadget
)
1444 dprintk(DEBUG_NORMAL
, "%s()\n", __func__
);
1449 * s3c2410_udc_set_selfpowered
1451 static int s3c2410_udc_set_selfpowered(struct usb_gadget
*gadget
, int value
)
1453 struct s3c2410_udc
*udc
= to_s3c2410_udc(gadget
);
1455 dprintk(DEBUG_NORMAL
, "%s()\n", __func__
);
1458 udc
->devstatus
|= (1 << USB_DEVICE_SELF_POWERED
);
1460 udc
->devstatus
&= ~(1 << USB_DEVICE_SELF_POWERED
);
1465 static void s3c2410_udc_disable(struct s3c2410_udc
*dev
);
1466 static void s3c2410_udc_enable(struct s3c2410_udc
*dev
);
1468 static int s3c2410_udc_set_pullup(struct s3c2410_udc
*udc
, int is_on
)
1470 dprintk(DEBUG_NORMAL
, "%s()\n", __func__
);
1472 if (udc_info
&& (udc_info
->udc_command
||
1473 gpio_is_valid(udc_info
->pullup_pin
))) {
1476 s3c2410_udc_enable(udc
);
1478 if (udc
->gadget
.speed
!= USB_SPEED_UNKNOWN
) {
1479 if (udc
->driver
&& udc
->driver
->disconnect
)
1480 udc
->driver
->disconnect(&udc
->gadget
);
1483 s3c2410_udc_disable(udc
);
1492 static int s3c2410_udc_vbus_session(struct usb_gadget
*gadget
, int is_active
)
1494 struct s3c2410_udc
*udc
= to_s3c2410_udc(gadget
);
1496 dprintk(DEBUG_NORMAL
, "%s()\n", __func__
);
1498 udc
->vbus
= (is_active
!= 0);
1499 s3c2410_udc_set_pullup(udc
, is_active
);
1503 static int s3c2410_udc_pullup(struct usb_gadget
*gadget
, int is_on
)
1505 struct s3c2410_udc
*udc
= to_s3c2410_udc(gadget
);
1507 dprintk(DEBUG_NORMAL
, "%s()\n", __func__
);
1509 s3c2410_udc_set_pullup(udc
, is_on
? 0 : 1);
1513 static irqreturn_t
s3c2410_udc_vbus_irq(int irq
, void *_dev
)
1515 struct s3c2410_udc
*dev
= _dev
;
1518 dprintk(DEBUG_NORMAL
, "%s()\n", __func__
);
1520 value
= gpio_get_value(udc_info
->vbus_pin
) ? 1 : 0;
1521 if (udc_info
->vbus_pin_inverted
)
1524 if (value
!= dev
->vbus
)
1525 s3c2410_udc_vbus_session(&dev
->gadget
, value
);
1530 static int s3c2410_vbus_draw(struct usb_gadget
*_gadget
, unsigned ma
)
1532 dprintk(DEBUG_NORMAL
, "%s()\n", __func__
);
1534 if (udc_info
&& udc_info
->vbus_draw
) {
1535 udc_info
->vbus_draw(ma
);
1542 static int s3c2410_udc_start(struct usb_gadget
*g
,
1543 struct usb_gadget_driver
*driver
);
1544 static int s3c2410_udc_stop(struct usb_gadget
*g
,
1545 struct usb_gadget_driver
*driver
);
1547 static const struct usb_gadget_ops s3c2410_ops
= {
1548 .get_frame
= s3c2410_udc_get_frame
,
1549 .wakeup
= s3c2410_udc_wakeup
,
1550 .set_selfpowered
= s3c2410_udc_set_selfpowered
,
1551 .pullup
= s3c2410_udc_pullup
,
1552 .vbus_session
= s3c2410_udc_vbus_session
,
1553 .vbus_draw
= s3c2410_vbus_draw
,
1554 .udc_start
= s3c2410_udc_start
,
1555 .udc_stop
= s3c2410_udc_stop
,
1558 static void s3c2410_udc_command(enum s3c2410_udc_cmd_e cmd
)
1563 if (udc_info
->udc_command
) {
1564 udc_info
->udc_command(cmd
);
1565 } else if (gpio_is_valid(udc_info
->pullup_pin
)) {
1569 case S3C2410_UDC_P_ENABLE
:
1572 case S3C2410_UDC_P_DISABLE
:
1578 value
^= udc_info
->pullup_pin_inverted
;
1580 gpio_set_value(udc_info
->pullup_pin
, value
);
1584 /*------------------------- gadget driver handling---------------------------*/
1586 * s3c2410_udc_disable
1588 static void s3c2410_udc_disable(struct s3c2410_udc
*dev
)
1590 dprintk(DEBUG_NORMAL
, "%s()\n", __func__
);
1592 /* Disable all interrupts */
1593 udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG
);
1594 udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG
);
1596 /* Clear the interrupt registers */
1597 udc_write(S3C2410_UDC_USBINT_RESET
1598 | S3C2410_UDC_USBINT_RESUME
1599 | S3C2410_UDC_USBINT_SUSPEND
,
1600 S3C2410_UDC_USB_INT_REG
);
1602 udc_write(0x1F, S3C2410_UDC_EP_INT_REG
);
1604 /* Good bye, cruel world */
1605 s3c2410_udc_command(S3C2410_UDC_P_DISABLE
);
1607 /* Set speed to unknown */
1608 dev
->gadget
.speed
= USB_SPEED_UNKNOWN
;
1612 * s3c2410_udc_reinit
1614 static void s3c2410_udc_reinit(struct s3c2410_udc
*dev
)
1618 /* device/ep0 records init */
1619 INIT_LIST_HEAD(&dev
->gadget
.ep_list
);
1620 INIT_LIST_HEAD(&dev
->gadget
.ep0
->ep_list
);
1621 dev
->ep0state
= EP0_IDLE
;
1623 for (i
= 0; i
< S3C2410_ENDPOINTS
; i
++) {
1624 struct s3c2410_ep
*ep
= &dev
->ep
[i
];
1627 list_add_tail(&ep
->ep
.ep_list
, &dev
->gadget
.ep_list
);
1632 INIT_LIST_HEAD(&ep
->queue
);
1633 usb_ep_set_maxpacket_limit(&ep
->ep
, ep
->ep
.maxpacket
);
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
*g
,
1671 struct usb_gadget_driver
*driver
)
1673 struct s3c2410_udc
*udc
= to_s3c2410(g
);
1675 dprintk(DEBUG_NORMAL
, "%s() '%s'\n", __func__
, driver
->driver
.name
);
1677 /* Hook the driver */
1678 udc
->driver
= driver
;
1681 s3c2410_udc_enable(udc
);
1686 static int s3c2410_udc_stop(struct usb_gadget
*g
,
1687 struct usb_gadget_driver
*driver
)
1689 struct s3c2410_udc
*udc
= to_s3c2410(g
);
1694 s3c2410_udc_disable(udc
);
1699 /*---------------------------------------------------------------------------*/
1700 static struct s3c2410_udc memory
= {
1702 .ops
= &s3c2410_ops
,
1703 .ep0
= &memory
.ep
[0].ep
,
1704 .name
= gadget_name
,
1706 .init_name
= "gadget",
1710 /* control endpoint */
1715 .ops
= &s3c2410_ep_ops
,
1716 .maxpacket
= EP0_FIFO_SIZE
,
1721 /* first group of endpoints */
1726 .ops
= &s3c2410_ep_ops
,
1727 .maxpacket
= EP_FIFO_SIZE
,
1730 .fifo_size
= EP_FIFO_SIZE
,
1731 .bEndpointAddress
= 1,
1732 .bmAttributes
= USB_ENDPOINT_XFER_BULK
,
1738 .ops
= &s3c2410_ep_ops
,
1739 .maxpacket
= EP_FIFO_SIZE
,
1742 .fifo_size
= EP_FIFO_SIZE
,
1743 .bEndpointAddress
= 2,
1744 .bmAttributes
= USB_ENDPOINT_XFER_BULK
,
1750 .ops
= &s3c2410_ep_ops
,
1751 .maxpacket
= EP_FIFO_SIZE
,
1754 .fifo_size
= EP_FIFO_SIZE
,
1755 .bEndpointAddress
= 3,
1756 .bmAttributes
= USB_ENDPOINT_XFER_BULK
,
1762 .ops
= &s3c2410_ep_ops
,
1763 .maxpacket
= EP_FIFO_SIZE
,
1766 .fifo_size
= EP_FIFO_SIZE
,
1767 .bEndpointAddress
= 4,
1768 .bmAttributes
= USB_ENDPOINT_XFER_BULK
,
1774 * probe - binds to the platform device
1776 static int s3c2410_udc_probe(struct platform_device
*pdev
)
1778 struct s3c2410_udc
*udc
= &memory
;
1779 struct device
*dev
= &pdev
->dev
;
1783 dev_dbg(dev
, "%s()\n", __func__
);
1785 usb_bus_clock
= clk_get(NULL
, "usb-bus-gadget");
1786 if (IS_ERR(usb_bus_clock
)) {
1787 dev_err(dev
, "failed to get usb bus clock source\n");
1788 return PTR_ERR(usb_bus_clock
);
1791 clk_enable(usb_bus_clock
);
1793 udc_clock
= clk_get(NULL
, "usb-device");
1794 if (IS_ERR(udc_clock
)) {
1795 dev_err(dev
, "failed to get udc clock source\n");
1796 return PTR_ERR(udc_clock
);
1799 clk_enable(udc_clock
);
1803 dev_dbg(dev
, "got and enabled clocks\n");
1805 if (strncmp(pdev
->name
, "s3c2440", 7) == 0) {
1806 dev_info(dev
, "S3C2440: increasing FIFO to 128 bytes\n");
1807 memory
.ep
[1].fifo_size
= S3C2440_EP_FIFO_SIZE
;
1808 memory
.ep
[2].fifo_size
= S3C2440_EP_FIFO_SIZE
;
1809 memory
.ep
[3].fifo_size
= S3C2440_EP_FIFO_SIZE
;
1810 memory
.ep
[4].fifo_size
= S3C2440_EP_FIFO_SIZE
;
1813 spin_lock_init(&udc
->lock
);
1814 udc_info
= dev_get_platdata(&pdev
->dev
);
1816 rsrc_start
= S3C2410_PA_USBDEV
;
1817 rsrc_len
= S3C24XX_SZ_USBDEV
;
1819 if (!request_mem_region(rsrc_start
, rsrc_len
, gadget_name
))
1822 base_addr
= ioremap(rsrc_start
, rsrc_len
);
1828 the_controller
= udc
;
1829 platform_set_drvdata(pdev
, udc
);
1831 s3c2410_udc_disable(udc
);
1832 s3c2410_udc_reinit(udc
);
1834 /* irq setup after old hardware state is cleaned up */
1835 retval
= request_irq(IRQ_USBD
, s3c2410_udc_irq
,
1836 0, gadget_name
, udc
);
1839 dev_err(dev
, "cannot get irq %i, err %d\n", IRQ_USBD
, retval
);
1844 dev_dbg(dev
, "got irq %i\n", IRQ_USBD
);
1846 if (udc_info
&& udc_info
->vbus_pin
> 0) {
1847 retval
= gpio_request(udc_info
->vbus_pin
, "udc vbus");
1849 dev_err(dev
, "cannot claim vbus pin\n");
1853 irq
= gpio_to_irq(udc_info
->vbus_pin
);
1855 dev_err(dev
, "no irq for gpio vbus pin\n");
1857 goto err_gpio_claim
;
1860 retval
= request_irq(irq
, s3c2410_udc_vbus_irq
,
1862 | IRQF_TRIGGER_FALLING
| IRQF_SHARED
,
1866 dev_err(dev
, "can't get vbus irq %d, err %d\n",
1869 goto err_gpio_claim
;
1872 dev_dbg(dev
, "got irq %i\n", irq
);
1877 if (udc_info
&& !udc_info
->udc_command
&&
1878 gpio_is_valid(udc_info
->pullup_pin
)) {
1880 retval
= gpio_request_one(udc_info
->pullup_pin
,
1881 udc_info
->vbus_pin_inverted
?
1882 GPIOF_OUT_INIT_HIGH
: GPIOF_OUT_INIT_LOW
,
1888 retval
= usb_add_gadget_udc(&pdev
->dev
, &udc
->gadget
);
1892 if (s3c2410_udc_debugfs_root
) {
1893 udc
->regs_info
= debugfs_create_file("registers", S_IRUGO
,
1894 s3c2410_udc_debugfs_root
,
1895 udc
, &s3c2410_udc_debugfs_fops
);
1896 if (!udc
->regs_info
)
1897 dev_warn(dev
, "debugfs file creation failed\n");
1900 dev_dbg(dev
, "probe ok\n");
1905 if (udc_info
&& !udc_info
->udc_command
&&
1906 gpio_is_valid(udc_info
->pullup_pin
))
1907 gpio_free(udc_info
->pullup_pin
);
1909 if (udc_info
&& udc_info
->vbus_pin
> 0)
1910 free_irq(gpio_to_irq(udc_info
->vbus_pin
), udc
);
1912 if (udc_info
&& udc_info
->vbus_pin
> 0)
1913 gpio_free(udc_info
->vbus_pin
);
1915 free_irq(IRQ_USBD
, udc
);
1919 release_mem_region(rsrc_start
, rsrc_len
);
1925 * s3c2410_udc_remove
1927 static int s3c2410_udc_remove(struct platform_device
*pdev
)
1929 struct s3c2410_udc
*udc
= platform_get_drvdata(pdev
);
1932 dev_dbg(&pdev
->dev
, "%s()\n", __func__
);
1937 usb_del_gadget_udc(&udc
->gadget
);
1938 debugfs_remove(udc
->regs_info
);
1940 if (udc_info
&& !udc_info
->udc_command
&&
1941 gpio_is_valid(udc_info
->pullup_pin
))
1942 gpio_free(udc_info
->pullup_pin
);
1944 if (udc_info
&& udc_info
->vbus_pin
> 0) {
1945 irq
= gpio_to_irq(udc_info
->vbus_pin
);
1949 free_irq(IRQ_USBD
, udc
);
1952 release_mem_region(rsrc_start
, rsrc_len
);
1954 if (!IS_ERR(udc_clock
) && udc_clock
!= NULL
) {
1955 clk_disable(udc_clock
);
1960 if (!IS_ERR(usb_bus_clock
) && usb_bus_clock
!= NULL
) {
1961 clk_disable(usb_bus_clock
);
1962 clk_put(usb_bus_clock
);
1963 usb_bus_clock
= NULL
;
1966 dev_dbg(&pdev
->dev
, "%s: remove ok\n", __func__
);
1972 s3c2410_udc_suspend(struct platform_device
*pdev
, pm_message_t message
)
1974 s3c2410_udc_command(S3C2410_UDC_P_DISABLE
);
1979 static int s3c2410_udc_resume(struct platform_device
*pdev
)
1981 s3c2410_udc_command(S3C2410_UDC_P_ENABLE
);
1986 #define s3c2410_udc_suspend NULL
1987 #define s3c2410_udc_resume NULL
1990 static const struct platform_device_id s3c_udc_ids
[] = {
1991 { "s3c2410-usbgadget", },
1992 { "s3c2440-usbgadget", },
1995 MODULE_DEVICE_TABLE(platform
, s3c_udc_ids
);
1997 static struct platform_driver udc_driver_24x0
= {
1999 .name
= "s3c24x0-usbgadget",
2000 .owner
= THIS_MODULE
,
2002 .probe
= s3c2410_udc_probe
,
2003 .remove
= s3c2410_udc_remove
,
2004 .suspend
= s3c2410_udc_suspend
,
2005 .resume
= s3c2410_udc_resume
,
2006 .id_table
= s3c_udc_ids
,
2009 static int __init
udc_init(void)
2013 dprintk(DEBUG_NORMAL
, "%s: version %s\n", gadget_name
, DRIVER_VERSION
);
2015 s3c2410_udc_debugfs_root
= debugfs_create_dir(gadget_name
, NULL
);
2016 if (IS_ERR(s3c2410_udc_debugfs_root
)) {
2017 pr_err("%s: debugfs dir creation failed %ld\n",
2018 gadget_name
, PTR_ERR(s3c2410_udc_debugfs_root
));
2019 s3c2410_udc_debugfs_root
= NULL
;
2022 retval
= platform_driver_register(&udc_driver_24x0
);
2029 debugfs_remove(s3c2410_udc_debugfs_root
);
2033 static void __exit
udc_exit(void)
2035 platform_driver_unregister(&udc_driver_24x0
);
2036 debugfs_remove(s3c2410_udc_debugfs_root
);
2039 module_init(udc_init
);
2040 module_exit(udc_exit
);
2042 MODULE_AUTHOR(DRIVER_AUTHOR
);
2043 MODULE_DESCRIPTION(DRIVER_DESC
);
2044 MODULE_VERSION(DRIVER_VERSION
);
2045 MODULE_LICENSE("GPL");