2 * linux/drivers/usb/gadget/s3c2410_udc.c
4 * Samsung S3C24xx series on-chip full speed USB device controllers
6 * Copyright (C) 2004-2007 Herbert Pötzl - Arnaud Patard
7 * Additional cleanups by Ben Dooks <ben-linux@fluff.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/delay.h>
18 #include <linux/ioport.h>
19 #include <linux/sched.h>
20 #include <linux/slab.h>
21 #include <linux/errno.h>
22 #include <linux/init.h>
23 #include <linux/timer.h>
24 #include <linux/list.h>
25 #include <linux/interrupt.h>
26 #include <linux/platform_device.h>
27 #include <linux/clk.h>
28 #include <linux/gpio.h>
29 #include <linux/prefetch.h>
31 #include <linux/debugfs.h>
32 #include <linux/seq_file.h>
34 #include <linux/usb.h>
35 #include <linux/usb/gadget.h>
37 #include <asm/byteorder.h>
40 #include <asm/unaligned.h>
41 #include <mach/irqs.h>
43 #include <mach/hardware.h>
45 #include <plat/regs-udc.h>
49 #include "s3c2410_udc.h"
51 #define DRIVER_DESC "S3C2410 USB Device Controller Gadget"
52 #define DRIVER_VERSION "29 Apr 2007"
53 #define DRIVER_AUTHOR "Herbert Pötzl <herbert@13thfloor.at>, " \
54 "Arnaud Patard <arnaud.patard@rtp-net.org>"
56 static const char gadget_name
[] = "s3c2410_udc";
57 static const char driver_desc
[] = DRIVER_DESC
;
59 static struct s3c2410_udc
*the_controller
;
60 static struct clk
*udc_clock
;
61 static struct clk
*usb_bus_clock
;
62 static void __iomem
*base_addr
;
63 static u64 rsrc_start
;
65 static struct dentry
*s3c2410_udc_debugfs_root
;
67 static inline u32
udc_read(u32 reg
)
69 return readb(base_addr
+ reg
);
72 static inline void udc_write(u32 value
, u32 reg
)
74 writeb(value
, base_addr
+ reg
);
77 static inline void udc_writeb(void __iomem
*base
, u32 value
, u32 reg
)
79 writeb(value
, base
+ reg
);
82 static struct s3c2410_udc_mach_info
*udc_info
;
84 /*************************** DEBUG FUNCTION ***************************/
85 #define DEBUG_NORMAL 1
86 #define DEBUG_VERBOSE 2
88 #ifdef CONFIG_USB_S3C2410_DEBUG
89 #define USB_S3C2410_DEBUG_LEVEL 0
91 static uint32_t s3c2410_ticks
= 0;
93 static int dprintk(int level
, const char *fmt
, ...)
95 static char printk_buf
[1024];
96 static long prevticks
;
97 static int invocation
;
101 if (level
> USB_S3C2410_DEBUG_LEVEL
)
104 if (s3c2410_ticks
!= prevticks
) {
105 prevticks
= s3c2410_ticks
;
109 len
= scnprintf(printk_buf
,
110 sizeof(printk_buf
), "%1lu.%02d USB: ",
111 prevticks
, invocation
++);
114 len
= vscnprintf(printk_buf
+len
,
115 sizeof(printk_buf
)-len
, fmt
, args
);
118 return printk(KERN_DEBUG
"%s", printk_buf
);
121 static int dprintk(int level
, const char *fmt
, ...)
126 static int s3c2410_udc_debugfs_seq_show(struct seq_file
*m
, void *p
)
128 u32 addr_reg
,pwr_reg
,ep_int_reg
,usb_int_reg
;
129 u32 ep_int_en_reg
, usb_int_en_reg
, ep0_csr
;
130 u32 ep1_i_csr1
,ep1_i_csr2
,ep1_o_csr1
,ep1_o_csr2
;
131 u32 ep2_i_csr1
,ep2_i_csr2
,ep2_o_csr1
,ep2_o_csr2
;
133 addr_reg
= udc_read(S3C2410_UDC_FUNC_ADDR_REG
);
134 pwr_reg
= udc_read(S3C2410_UDC_PWR_REG
);
135 ep_int_reg
= udc_read(S3C2410_UDC_EP_INT_REG
);
136 usb_int_reg
= udc_read(S3C2410_UDC_USB_INT_REG
);
137 ep_int_en_reg
= udc_read(S3C2410_UDC_EP_INT_EN_REG
);
138 usb_int_en_reg
= udc_read(S3C2410_UDC_USB_INT_EN_REG
);
139 udc_write(0, S3C2410_UDC_INDEX_REG
);
140 ep0_csr
= udc_read(S3C2410_UDC_IN_CSR1_REG
);
141 udc_write(1, S3C2410_UDC_INDEX_REG
);
142 ep1_i_csr1
= udc_read(S3C2410_UDC_IN_CSR1_REG
);
143 ep1_i_csr2
= udc_read(S3C2410_UDC_IN_CSR2_REG
);
144 ep1_o_csr1
= udc_read(S3C2410_UDC_IN_CSR1_REG
);
145 ep1_o_csr2
= udc_read(S3C2410_UDC_IN_CSR2_REG
);
146 udc_write(2, S3C2410_UDC_INDEX_REG
);
147 ep2_i_csr1
= udc_read(S3C2410_UDC_IN_CSR1_REG
);
148 ep2_i_csr2
= udc_read(S3C2410_UDC_IN_CSR2_REG
);
149 ep2_o_csr1
= udc_read(S3C2410_UDC_IN_CSR1_REG
);
150 ep2_o_csr2
= udc_read(S3C2410_UDC_IN_CSR2_REG
);
152 seq_printf(m
, "FUNC_ADDR_REG : 0x%04X\n"
154 "EP_INT_REG : 0x%04X\n"
155 "USB_INT_REG : 0x%04X\n"
156 "EP_INT_EN_REG : 0x%04X\n"
157 "USB_INT_EN_REG : 0x%04X\n"
159 "EP1_I_CSR1 : 0x%04X\n"
160 "EP1_I_CSR2 : 0x%04X\n"
161 "EP1_O_CSR1 : 0x%04X\n"
162 "EP1_O_CSR2 : 0x%04X\n"
163 "EP2_I_CSR1 : 0x%04X\n"
164 "EP2_I_CSR2 : 0x%04X\n"
165 "EP2_O_CSR1 : 0x%04X\n"
166 "EP2_O_CSR2 : 0x%04X\n",
167 addr_reg
,pwr_reg
,ep_int_reg
,usb_int_reg
,
168 ep_int_en_reg
, usb_int_en_reg
, ep0_csr
,
169 ep1_i_csr1
,ep1_i_csr2
,ep1_o_csr1
,ep1_o_csr2
,
170 ep2_i_csr1
,ep2_i_csr2
,ep2_o_csr1
,ep2_o_csr2
176 static int s3c2410_udc_debugfs_fops_open(struct inode
*inode
,
179 return single_open(file
, s3c2410_udc_debugfs_seq_show
, NULL
);
182 static const struct file_operations s3c2410_udc_debugfs_fops
= {
183 .open
= s3c2410_udc_debugfs_fops_open
,
186 .release
= single_release
,
187 .owner
= THIS_MODULE
,
192 static inline void s3c2410_udc_clear_ep0_opr(void __iomem
*base
)
194 udc_writeb(base
, S3C2410_UDC_INDEX_EP0
, S3C2410_UDC_INDEX_REG
);
195 udc_writeb(base
, S3C2410_UDC_EP0_CSR_SOPKTRDY
,
196 S3C2410_UDC_EP0_CSR_REG
);
199 static inline void s3c2410_udc_clear_ep0_sst(void __iomem
*base
)
201 udc_writeb(base
, S3C2410_UDC_INDEX_EP0
, S3C2410_UDC_INDEX_REG
);
202 writeb(0x00, base
+ S3C2410_UDC_EP0_CSR_REG
);
205 static inline void s3c2410_udc_clear_ep0_se(void __iomem
*base
)
207 udc_writeb(base
, S3C2410_UDC_INDEX_EP0
, S3C2410_UDC_INDEX_REG
);
208 udc_writeb(base
, S3C2410_UDC_EP0_CSR_SSE
, S3C2410_UDC_EP0_CSR_REG
);
211 static inline void s3c2410_udc_set_ep0_ipr(void __iomem
*base
)
213 udc_writeb(base
, S3C2410_UDC_INDEX_EP0
, S3C2410_UDC_INDEX_REG
);
214 udc_writeb(base
, S3C2410_UDC_EP0_CSR_IPKRDY
, S3C2410_UDC_EP0_CSR_REG
);
217 static inline void s3c2410_udc_set_ep0_de(void __iomem
*base
)
219 udc_writeb(base
, S3C2410_UDC_INDEX_EP0
, S3C2410_UDC_INDEX_REG
);
220 udc_writeb(base
, S3C2410_UDC_EP0_CSR_DE
, S3C2410_UDC_EP0_CSR_REG
);
223 inline void s3c2410_udc_set_ep0_ss(void __iomem
*b
)
225 udc_writeb(b
, S3C2410_UDC_INDEX_EP0
, S3C2410_UDC_INDEX_REG
);
226 udc_writeb(b
, S3C2410_UDC_EP0_CSR_SENDSTL
, S3C2410_UDC_EP0_CSR_REG
);
229 static inline void s3c2410_udc_set_ep0_de_out(void __iomem
*base
)
231 udc_writeb(base
, S3C2410_UDC_INDEX_EP0
, S3C2410_UDC_INDEX_REG
);
233 udc_writeb(base
,(S3C2410_UDC_EP0_CSR_SOPKTRDY
234 | S3C2410_UDC_EP0_CSR_DE
),
235 S3C2410_UDC_EP0_CSR_REG
);
238 static inline void s3c2410_udc_set_ep0_sse_out(void __iomem
*base
)
240 udc_writeb(base
, S3C2410_UDC_INDEX_EP0
, S3C2410_UDC_INDEX_REG
);
241 udc_writeb(base
, (S3C2410_UDC_EP0_CSR_SOPKTRDY
242 | S3C2410_UDC_EP0_CSR_SSE
),
243 S3C2410_UDC_EP0_CSR_REG
);
246 static inline void s3c2410_udc_set_ep0_de_in(void __iomem
*base
)
248 udc_writeb(base
, S3C2410_UDC_INDEX_EP0
, S3C2410_UDC_INDEX_REG
);
249 udc_writeb(base
, (S3C2410_UDC_EP0_CSR_IPKRDY
250 | S3C2410_UDC_EP0_CSR_DE
),
251 S3C2410_UDC_EP0_CSR_REG
);
254 /*------------------------- I/O ----------------------------------*/
259 static void s3c2410_udc_done(struct s3c2410_ep
*ep
,
260 struct s3c2410_request
*req
, int status
)
262 unsigned halted
= ep
->halted
;
264 list_del_init(&req
->queue
);
266 if (likely (req
->req
.status
== -EINPROGRESS
))
267 req
->req
.status
= status
;
269 status
= req
->req
.status
;
272 req
->req
.complete(&ep
->ep
, &req
->req
);
276 static void s3c2410_udc_nuke(struct s3c2410_udc
*udc
,
277 struct s3c2410_ep
*ep
, int status
)
280 if (&ep
->queue
== NULL
)
283 while (!list_empty (&ep
->queue
)) {
284 struct s3c2410_request
*req
;
285 req
= list_entry (ep
->queue
.next
, struct s3c2410_request
,
287 s3c2410_udc_done(ep
, req
, status
);
291 static inline void s3c2410_udc_clear_ep_state(struct s3c2410_udc
*dev
)
295 /* hardware SET_{CONFIGURATION,INTERFACE} automagic resets endpoint
296 * fifos, and pending transactions mustn't be continued in any case.
299 for (i
= 1; i
< S3C2410_ENDPOINTS
; i
++)
300 s3c2410_udc_nuke(dev
, &dev
->ep
[i
], -ECONNABORTED
);
303 static inline int s3c2410_udc_fifo_count_out(void)
307 tmp
= udc_read(S3C2410_UDC_OUT_FIFO_CNT2_REG
) << 8;
308 tmp
|= udc_read(S3C2410_UDC_OUT_FIFO_CNT1_REG
);
313 * s3c2410_udc_write_packet
315 static inline int s3c2410_udc_write_packet(int fifo
,
316 struct s3c2410_request
*req
,
319 unsigned len
= min(req
->req
.length
- req
->req
.actual
, max
);
320 u8
*buf
= req
->req
.buf
+ req
->req
.actual
;
324 dprintk(DEBUG_VERBOSE
, "%s %d %d %d %d\n", __func__
,
325 req
->req
.actual
, req
->req
.length
, len
, req
->req
.actual
+ len
);
327 req
->req
.actual
+= len
;
330 writesb(base_addr
+ fifo
, buf
, len
);
335 * s3c2410_udc_write_fifo
337 * return: 0 = still running, 1 = completed, negative = errno
339 static int s3c2410_udc_write_fifo(struct s3c2410_ep
*ep
,
340 struct s3c2410_request
*req
)
348 idx
= ep
->bEndpointAddress
& 0x7F;
353 fifo_reg
= S3C2410_UDC_EP0_FIFO_REG
;
356 fifo_reg
= S3C2410_UDC_EP1_FIFO_REG
;
359 fifo_reg
= S3C2410_UDC_EP2_FIFO_REG
;
362 fifo_reg
= S3C2410_UDC_EP3_FIFO_REG
;
365 fifo_reg
= S3C2410_UDC_EP4_FIFO_REG
;
369 count
= s3c2410_udc_write_packet(fifo_reg
, req
, ep
->ep
.maxpacket
);
371 /* last packet is often short (sometimes a zlp) */
372 if (count
!= ep
->ep
.maxpacket
)
374 else if (req
->req
.length
!= req
->req
.actual
|| req
->req
.zero
)
379 /* Only ep0 debug messages are interesting */
381 dprintk(DEBUG_NORMAL
,
382 "Written ep%d %d.%d of %d b [last %d,z %d]\n",
383 idx
, count
, req
->req
.actual
, req
->req
.length
,
384 is_last
, req
->req
.zero
);
387 /* The order is important. It prevents sending 2 packets
388 * at the same time */
391 /* Reset signal => no need to say 'data sent' */
392 if (! (udc_read(S3C2410_UDC_USB_INT_REG
)
393 & S3C2410_UDC_USBINT_RESET
))
394 s3c2410_udc_set_ep0_de_in(base_addr
);
395 ep
->dev
->ep0state
=EP0_IDLE
;
397 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
398 ep_csr
= udc_read(S3C2410_UDC_IN_CSR1_REG
);
399 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
400 udc_write(ep_csr
| S3C2410_UDC_ICSR1_PKTRDY
,
401 S3C2410_UDC_IN_CSR1_REG
);
404 s3c2410_udc_done(ep
, req
, 0);
408 /* Reset signal => no need to say 'data sent' */
409 if (! (udc_read(S3C2410_UDC_USB_INT_REG
)
410 & S3C2410_UDC_USBINT_RESET
))
411 s3c2410_udc_set_ep0_ipr(base_addr
);
413 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
414 ep_csr
= udc_read(S3C2410_UDC_IN_CSR1_REG
);
415 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
416 udc_write(ep_csr
| S3C2410_UDC_ICSR1_PKTRDY
,
417 S3C2410_UDC_IN_CSR1_REG
);
424 static inline int s3c2410_udc_read_packet(int fifo
, u8
*buf
,
425 struct s3c2410_request
*req
, unsigned avail
)
429 len
= min(req
->req
.length
- req
->req
.actual
, avail
);
430 req
->req
.actual
+= len
;
432 readsb(fifo
+ base_addr
, buf
, len
);
437 * return: 0 = still running, 1 = queue empty, negative = errno
439 static int s3c2410_udc_read_fifo(struct s3c2410_ep
*ep
,
440 struct s3c2410_request
*req
)
444 unsigned bufferspace
;
451 idx
= ep
->bEndpointAddress
& 0x7F;
457 fifo_reg
= S3C2410_UDC_EP0_FIFO_REG
;
460 fifo_reg
= S3C2410_UDC_EP1_FIFO_REG
;
463 fifo_reg
= S3C2410_UDC_EP2_FIFO_REG
;
466 fifo_reg
= S3C2410_UDC_EP3_FIFO_REG
;
469 fifo_reg
= S3C2410_UDC_EP4_FIFO_REG
;
473 if (!req
->req
.length
)
476 buf
= req
->req
.buf
+ req
->req
.actual
;
477 bufferspace
= req
->req
.length
- req
->req
.actual
;
479 dprintk(DEBUG_NORMAL
, "%s: buffer full!\n", __func__
);
483 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
485 fifo_count
= s3c2410_udc_fifo_count_out();
486 dprintk(DEBUG_NORMAL
, "%s fifo count : %d\n", __func__
, fifo_count
);
488 if (fifo_count
> ep
->ep
.maxpacket
)
489 avail
= ep
->ep
.maxpacket
;
493 fifo_count
= s3c2410_udc_read_packet(fifo_reg
, buf
, req
, avail
);
495 /* checking this with ep0 is not accurate as we already
496 * read a control request
498 if (idx
!= 0 && fifo_count
< ep
->ep
.maxpacket
) {
500 /* overflowed this request? flush extra data */
501 if (fifo_count
!= avail
)
502 req
->req
.status
= -EOVERFLOW
;
504 is_last
= (req
->req
.length
<= req
->req
.actual
) ? 1 : 0;
507 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
508 fifo_count
= s3c2410_udc_fifo_count_out();
510 /* Only ep0 debug messages are interesting */
512 dprintk(DEBUG_VERBOSE
, "%s fifo count : %d [last %d]\n",
513 __func__
, fifo_count
,is_last
);
517 s3c2410_udc_set_ep0_de_out(base_addr
);
518 ep
->dev
->ep0state
= EP0_IDLE
;
520 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
521 ep_csr
= udc_read(S3C2410_UDC_OUT_CSR1_REG
);
522 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
523 udc_write(ep_csr
& ~S3C2410_UDC_OCSR1_PKTRDY
,
524 S3C2410_UDC_OUT_CSR1_REG
);
527 s3c2410_udc_done(ep
, req
, 0);
530 s3c2410_udc_clear_ep0_opr(base_addr
);
532 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
533 ep_csr
= udc_read(S3C2410_UDC_OUT_CSR1_REG
);
534 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
535 udc_write(ep_csr
& ~S3C2410_UDC_OCSR1_PKTRDY
,
536 S3C2410_UDC_OUT_CSR1_REG
);
543 static int s3c2410_udc_read_fifo_crq(struct usb_ctrlrequest
*crq
)
545 unsigned char *outbuf
= (unsigned char*)crq
;
548 udc_write(0, S3C2410_UDC_INDEX_REG
);
550 bytes_read
= s3c2410_udc_fifo_count_out();
552 dprintk(DEBUG_NORMAL
, "%s: fifo_count=%d\n", __func__
, bytes_read
);
554 if (bytes_read
> sizeof(struct usb_ctrlrequest
))
555 bytes_read
= sizeof(struct usb_ctrlrequest
);
557 readsb(S3C2410_UDC_EP0_FIFO_REG
+ base_addr
, outbuf
, bytes_read
);
559 dprintk(DEBUG_VERBOSE
, "%s: len=%d %02x:%02x {%x,%x,%x}\n", __func__
,
560 bytes_read
, crq
->bRequest
, crq
->bRequestType
,
561 crq
->wValue
, crq
->wIndex
, crq
->wLength
);
566 static int s3c2410_udc_get_status(struct s3c2410_udc
*dev
,
567 struct usb_ctrlrequest
*crq
)
570 u8 ep_num
= crq
->wIndex
& 0x7F;
571 u8 is_in
= crq
->wIndex
& USB_DIR_IN
;
573 switch (crq
->bRequestType
& USB_RECIP_MASK
) {
574 case USB_RECIP_INTERFACE
:
577 case USB_RECIP_DEVICE
:
578 status
= dev
->devstatus
;
581 case USB_RECIP_ENDPOINT
:
582 if (ep_num
> 4 || crq
->wLength
> 2)
586 udc_write(0, S3C2410_UDC_INDEX_REG
);
587 status
= udc_read(S3C2410_UDC_IN_CSR1_REG
);
588 status
= status
& S3C2410_UDC_EP0_CSR_SENDSTL
;
590 udc_write(ep_num
, S3C2410_UDC_INDEX_REG
);
592 status
= udc_read(S3C2410_UDC_IN_CSR1_REG
);
593 status
= status
& S3C2410_UDC_ICSR1_SENDSTL
;
595 status
= udc_read(S3C2410_UDC_OUT_CSR1_REG
);
596 status
= status
& S3C2410_UDC_OCSR1_SENDSTL
;
600 status
= status
? 1 : 0;
607 /* Seems to be needed to get it working. ouch :( */
609 udc_write(status
& 0xFF, S3C2410_UDC_EP0_FIFO_REG
);
610 udc_write(status
>> 8, S3C2410_UDC_EP0_FIFO_REG
);
611 s3c2410_udc_set_ep0_de_in(base_addr
);
615 /*------------------------- usb state machine -------------------------------*/
616 static int s3c2410_udc_set_halt(struct usb_ep
*_ep
, int value
);
618 static void s3c2410_udc_handle_ep0_idle(struct s3c2410_udc
*dev
,
619 struct s3c2410_ep
*ep
,
620 struct usb_ctrlrequest
*crq
,
625 /* start control request? */
626 if (!(ep0csr
& S3C2410_UDC_EP0_CSR_OPKRDY
))
629 s3c2410_udc_nuke(dev
, ep
, -EPROTO
);
631 len
= s3c2410_udc_read_fifo_crq(crq
);
632 if (len
!= sizeof(*crq
)) {
633 dprintk(DEBUG_NORMAL
, "setup begin: fifo READ ERROR"
634 " wanted %d bytes got %d. Stalling out...\n",
636 s3c2410_udc_set_ep0_ss(base_addr
);
640 dprintk(DEBUG_NORMAL
, "bRequest = %d bRequestType %d wLength = %d\n",
641 crq
->bRequest
, crq
->bRequestType
, crq
->wLength
);
643 /* cope with automagic for some standard requests. */
644 dev
->req_std
= (crq
->bRequestType
& USB_TYPE_MASK
)
645 == USB_TYPE_STANDARD
;
647 dev
->req_pending
= 1;
649 switch (crq
->bRequest
) {
650 case USB_REQ_SET_CONFIGURATION
:
651 dprintk(DEBUG_NORMAL
, "USB_REQ_SET_CONFIGURATION ... \n");
653 if (crq
->bRequestType
== USB_RECIP_DEVICE
) {
655 s3c2410_udc_set_ep0_de_out(base_addr
);
659 case USB_REQ_SET_INTERFACE
:
660 dprintk(DEBUG_NORMAL
, "USB_REQ_SET_INTERFACE ... \n");
662 if (crq
->bRequestType
== USB_RECIP_INTERFACE
) {
664 s3c2410_udc_set_ep0_de_out(base_addr
);
668 case USB_REQ_SET_ADDRESS
:
669 dprintk(DEBUG_NORMAL
, "USB_REQ_SET_ADDRESS ... \n");
671 if (crq
->bRequestType
== USB_RECIP_DEVICE
) {
672 tmp
= crq
->wValue
& 0x7F;
674 udc_write((tmp
| S3C2410_UDC_FUNCADDR_UPDATE
),
675 S3C2410_UDC_FUNC_ADDR_REG
);
676 s3c2410_udc_set_ep0_de_out(base_addr
);
681 case USB_REQ_GET_STATUS
:
682 dprintk(DEBUG_NORMAL
, "USB_REQ_GET_STATUS ... \n");
683 s3c2410_udc_clear_ep0_opr(base_addr
);
686 if (!s3c2410_udc_get_status(dev
, crq
)) {
692 case USB_REQ_CLEAR_FEATURE
:
693 s3c2410_udc_clear_ep0_opr(base_addr
);
695 if (crq
->bRequestType
!= USB_RECIP_ENDPOINT
)
698 if (crq
->wValue
!= USB_ENDPOINT_HALT
|| crq
->wLength
!= 0)
701 s3c2410_udc_set_halt(&dev
->ep
[crq
->wIndex
& 0x7f].ep
, 0);
702 s3c2410_udc_set_ep0_de_out(base_addr
);
705 case USB_REQ_SET_FEATURE
:
706 s3c2410_udc_clear_ep0_opr(base_addr
);
708 if (crq
->bRequestType
!= USB_RECIP_ENDPOINT
)
711 if (crq
->wValue
!= USB_ENDPOINT_HALT
|| crq
->wLength
!= 0)
714 s3c2410_udc_set_halt(&dev
->ep
[crq
->wIndex
& 0x7f].ep
, 1);
715 s3c2410_udc_set_ep0_de_out(base_addr
);
719 s3c2410_udc_clear_ep0_opr(base_addr
);
723 if (crq
->bRequestType
& USB_DIR_IN
)
724 dev
->ep0state
= EP0_IN_DATA_PHASE
;
726 dev
->ep0state
= EP0_OUT_DATA_PHASE
;
731 /* deliver the request to the gadget driver */
732 ret
= dev
->driver
->setup(&dev
->gadget
, crq
);
734 if (dev
->req_config
) {
735 dprintk(DEBUG_NORMAL
, "config change %02x fail %d?\n",
740 if (ret
== -EOPNOTSUPP
)
741 dprintk(DEBUG_NORMAL
, "Operation not supported\n");
743 dprintk(DEBUG_NORMAL
,
744 "dev->driver->setup failed. (%d)\n", ret
);
747 s3c2410_udc_set_ep0_ss(base_addr
);
748 s3c2410_udc_set_ep0_de_out(base_addr
);
749 dev
->ep0state
= EP0_IDLE
;
750 /* deferred i/o == no response yet */
751 } else if (dev
->req_pending
) {
752 dprintk(DEBUG_VERBOSE
, "dev->req_pending... what now?\n");
756 dprintk(DEBUG_VERBOSE
, "ep0state %s\n", ep0states
[dev
->ep0state
]);
759 static void s3c2410_udc_handle_ep0(struct s3c2410_udc
*dev
)
762 struct s3c2410_ep
*ep
= &dev
->ep
[0];
763 struct s3c2410_request
*req
;
764 struct usb_ctrlrequest crq
;
766 if (list_empty(&ep
->queue
))
769 req
= list_entry(ep
->queue
.next
, struct s3c2410_request
, queue
);
771 /* We make the assumption that S3C2410_UDC_IN_CSR1_REG equal to
772 * S3C2410_UDC_EP0_CSR_REG when index is zero */
774 udc_write(0, S3C2410_UDC_INDEX_REG
);
775 ep0csr
= udc_read(S3C2410_UDC_IN_CSR1_REG
);
777 dprintk(DEBUG_NORMAL
, "ep0csr %x ep0state %s\n",
778 ep0csr
, ep0states
[dev
->ep0state
]);
780 /* clear stall status */
781 if (ep0csr
& S3C2410_UDC_EP0_CSR_SENTSTL
) {
782 s3c2410_udc_nuke(dev
, ep
, -EPIPE
);
783 dprintk(DEBUG_NORMAL
, "... clear SENT_STALL ...\n");
784 s3c2410_udc_clear_ep0_sst(base_addr
);
785 dev
->ep0state
= EP0_IDLE
;
789 /* clear setup end */
790 if (ep0csr
& S3C2410_UDC_EP0_CSR_SE
) {
791 dprintk(DEBUG_NORMAL
, "... serviced SETUP_END ...\n");
792 s3c2410_udc_nuke(dev
, ep
, 0);
793 s3c2410_udc_clear_ep0_se(base_addr
);
794 dev
->ep0state
= EP0_IDLE
;
797 switch (dev
->ep0state
) {
799 s3c2410_udc_handle_ep0_idle(dev
, ep
, &crq
, ep0csr
);
802 case EP0_IN_DATA_PHASE
: /* GET_DESCRIPTOR etc */
803 dprintk(DEBUG_NORMAL
, "EP0_IN_DATA_PHASE ... what now?\n");
804 if (!(ep0csr
& S3C2410_UDC_EP0_CSR_IPKRDY
) && req
) {
805 s3c2410_udc_write_fifo(ep
, req
);
809 case EP0_OUT_DATA_PHASE
: /* SET_DESCRIPTOR etc */
810 dprintk(DEBUG_NORMAL
, "EP0_OUT_DATA_PHASE ... what now?\n");
811 if ((ep0csr
& S3C2410_UDC_EP0_CSR_OPKRDY
) && req
) {
812 s3c2410_udc_read_fifo(ep
,req
);
817 dprintk(DEBUG_NORMAL
, "EP0_END_XFER ... what now?\n");
818 dev
->ep0state
= EP0_IDLE
;
822 dprintk(DEBUG_NORMAL
, "EP0_STALL ... what now?\n");
823 dev
->ep0state
= EP0_IDLE
;
829 * handle_ep - Manage I/O endpoints
832 static void s3c2410_udc_handle_ep(struct s3c2410_ep
*ep
)
834 struct s3c2410_request
*req
;
835 int is_in
= ep
->bEndpointAddress
& USB_DIR_IN
;
839 if (likely (!list_empty(&ep
->queue
)))
840 req
= list_entry(ep
->queue
.next
,
841 struct s3c2410_request
, queue
);
845 idx
= ep
->bEndpointAddress
& 0x7F;
848 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
849 ep_csr1
= udc_read(S3C2410_UDC_IN_CSR1_REG
);
850 dprintk(DEBUG_VERBOSE
, "ep%01d write csr:%02x %d\n",
851 idx
, ep_csr1
, req
? 1 : 0);
853 if (ep_csr1
& S3C2410_UDC_ICSR1_SENTSTL
) {
854 dprintk(DEBUG_VERBOSE
, "st\n");
855 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
856 udc_write(ep_csr1
& ~S3C2410_UDC_ICSR1_SENTSTL
,
857 S3C2410_UDC_IN_CSR1_REG
);
861 if (!(ep_csr1
& S3C2410_UDC_ICSR1_PKTRDY
) && req
) {
862 s3c2410_udc_write_fifo(ep
,req
);
865 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
866 ep_csr1
= udc_read(S3C2410_UDC_OUT_CSR1_REG
);
867 dprintk(DEBUG_VERBOSE
, "ep%01d rd csr:%02x\n", idx
, ep_csr1
);
869 if (ep_csr1
& S3C2410_UDC_OCSR1_SENTSTL
) {
870 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
871 udc_write(ep_csr1
& ~S3C2410_UDC_OCSR1_SENTSTL
,
872 S3C2410_UDC_OUT_CSR1_REG
);
876 if ((ep_csr1
& S3C2410_UDC_OCSR1_PKTRDY
) && req
) {
877 s3c2410_udc_read_fifo(ep
,req
);
882 #include <mach/regs-irq.h>
885 * s3c2410_udc_irq - interrupt handler
887 static irqreturn_t
s3c2410_udc_irq(int dummy
, void *_dev
)
889 struct s3c2410_udc
*dev
= _dev
;
898 spin_lock_irqsave(&dev
->lock
, flags
);
900 /* Driver connected ? */
902 /* Clear interrupts */
903 udc_write(udc_read(S3C2410_UDC_USB_INT_REG
),
904 S3C2410_UDC_USB_INT_REG
);
905 udc_write(udc_read(S3C2410_UDC_EP_INT_REG
),
906 S3C2410_UDC_EP_INT_REG
);
910 idx
= udc_read(S3C2410_UDC_INDEX_REG
);
912 /* Read status registers */
913 usb_status
= udc_read(S3C2410_UDC_USB_INT_REG
);
914 usbd_status
= udc_read(S3C2410_UDC_EP_INT_REG
);
915 pwr_reg
= udc_read(S3C2410_UDC_PWR_REG
);
917 udc_writeb(base_addr
, S3C2410_UDC_INDEX_EP0
, S3C2410_UDC_INDEX_REG
);
918 ep0csr
= udc_read(S3C2410_UDC_IN_CSR1_REG
);
920 dprintk(DEBUG_NORMAL
, "usbs=%02x, usbds=%02x, pwr=%02x ep0csr=%02x\n",
921 usb_status
, usbd_status
, pwr_reg
, ep0csr
);
924 * Now, handle interrupts. There's two types :
925 * - Reset, Resume, Suspend coming -> usb_int_reg
930 if (usb_status
& S3C2410_UDC_USBINT_RESET
) {
931 /* two kind of reset :
932 * - reset start -> pwr reg = 8
933 * - reset end -> pwr reg = 0
935 dprintk(DEBUG_NORMAL
, "USB reset csr %x pwr %x\n",
938 dev
->gadget
.speed
= USB_SPEED_UNKNOWN
;
939 udc_write(0x00, S3C2410_UDC_INDEX_REG
);
940 udc_write((dev
->ep
[0].ep
.maxpacket
& 0x7ff) >> 3,
941 S3C2410_UDC_MAXP_REG
);
944 dev
->ep0state
= EP0_IDLE
;
945 dev
->gadget
.speed
= USB_SPEED_FULL
;
947 /* clear interrupt */
948 udc_write(S3C2410_UDC_USBINT_RESET
,
949 S3C2410_UDC_USB_INT_REG
);
951 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
952 spin_unlock_irqrestore(&dev
->lock
, flags
);
957 if (usb_status
& S3C2410_UDC_USBINT_RESUME
) {
958 dprintk(DEBUG_NORMAL
, "USB resume\n");
960 /* clear interrupt */
961 udc_write(S3C2410_UDC_USBINT_RESUME
,
962 S3C2410_UDC_USB_INT_REG
);
964 if (dev
->gadget
.speed
!= USB_SPEED_UNKNOWN
966 && dev
->driver
->resume
)
967 dev
->driver
->resume(&dev
->gadget
);
971 if (usb_status
& S3C2410_UDC_USBINT_SUSPEND
) {
972 dprintk(DEBUG_NORMAL
, "USB suspend\n");
974 /* clear interrupt */
975 udc_write(S3C2410_UDC_USBINT_SUSPEND
,
976 S3C2410_UDC_USB_INT_REG
);
978 if (dev
->gadget
.speed
!= USB_SPEED_UNKNOWN
980 && dev
->driver
->suspend
)
981 dev
->driver
->suspend(&dev
->gadget
);
983 dev
->ep0state
= EP0_IDLE
;
987 /* control traffic */
988 /* check on ep0csr != 0 is not a good idea as clearing in_pkt_ready
989 * generate an interrupt
991 if (usbd_status
& S3C2410_UDC_INT_EP0
) {
992 dprintk(DEBUG_VERBOSE
, "USB ep0 irq\n");
993 /* Clear the interrupt bit by setting it to 1 */
994 udc_write(S3C2410_UDC_INT_EP0
, S3C2410_UDC_EP_INT_REG
);
995 s3c2410_udc_handle_ep0(dev
);
998 /* endpoint data transfers */
999 for (i
= 1; i
< S3C2410_ENDPOINTS
; i
++) {
1001 if (usbd_status
& tmp
) {
1002 dprintk(DEBUG_VERBOSE
, "USB ep%d irq\n", i
);
1004 /* Clear the interrupt bit by setting it to 1 */
1005 udc_write(tmp
, S3C2410_UDC_EP_INT_REG
);
1006 s3c2410_udc_handle_ep(&dev
->ep
[i
]);
1010 /* what else causes this interrupt? a receive! who is it? */
1011 if (!usb_status
&& !usbd_status
&& !pwr_reg
&& !ep0csr
) {
1012 for (i
= 1; i
< S3C2410_ENDPOINTS
; i
++) {
1013 idx2
= udc_read(S3C2410_UDC_INDEX_REG
);
1014 udc_write(i
, S3C2410_UDC_INDEX_REG
);
1016 if (udc_read(S3C2410_UDC_OUT_CSR1_REG
) & 0x1)
1017 s3c2410_udc_handle_ep(&dev
->ep
[i
]);
1020 udc_write(idx2
, S3C2410_UDC_INDEX_REG
);
1024 dprintk(DEBUG_VERBOSE
, "irq: %d s3c2410_udc_done.\n", IRQ_USBD
);
1026 /* Restore old index */
1027 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
1029 spin_unlock_irqrestore(&dev
->lock
, flags
);
1033 /*------------------------- s3c2410_ep_ops ----------------------------------*/
1035 static inline struct s3c2410_ep
*to_s3c2410_ep(struct usb_ep
*ep
)
1037 return container_of(ep
, struct s3c2410_ep
, ep
);
1040 static inline struct s3c2410_udc
*to_s3c2410_udc(struct usb_gadget
*gadget
)
1042 return container_of(gadget
, struct s3c2410_udc
, gadget
);
1045 static inline struct s3c2410_request
*to_s3c2410_req(struct usb_request
*req
)
1047 return container_of(req
, struct s3c2410_request
, req
);
1051 * s3c2410_udc_ep_enable
1053 static int s3c2410_udc_ep_enable(struct usb_ep
*_ep
,
1054 const struct usb_endpoint_descriptor
*desc
)
1056 struct s3c2410_udc
*dev
;
1057 struct s3c2410_ep
*ep
;
1059 unsigned long flags
;
1063 ep
= to_s3c2410_ep(_ep
);
1065 if (!_ep
|| !desc
|| ep
->ep
.desc
1066 || _ep
->name
== ep0name
1067 || desc
->bDescriptorType
!= USB_DT_ENDPOINT
)
1071 if (!dev
->driver
|| dev
->gadget
.speed
== USB_SPEED_UNKNOWN
)
1074 max
= usb_endpoint_maxp(desc
) & 0x1fff;
1076 local_irq_save (flags
);
1077 _ep
->maxpacket
= max
& 0x7ff;
1080 ep
->bEndpointAddress
= desc
->bEndpointAddress
;
1082 /* set max packet */
1083 udc_write(ep
->num
, S3C2410_UDC_INDEX_REG
);
1084 udc_write(max
>> 3, S3C2410_UDC_MAXP_REG
);
1086 /* set type, direction, address; reset fifo counters */
1087 if (desc
->bEndpointAddress
& USB_DIR_IN
) {
1088 csr1
= S3C2410_UDC_ICSR1_FFLUSH
|S3C2410_UDC_ICSR1_CLRDT
;
1089 csr2
= S3C2410_UDC_ICSR2_MODEIN
|S3C2410_UDC_ICSR2_DMAIEN
;
1091 udc_write(ep
->num
, S3C2410_UDC_INDEX_REG
);
1092 udc_write(csr1
, S3C2410_UDC_IN_CSR1_REG
);
1093 udc_write(ep
->num
, S3C2410_UDC_INDEX_REG
);
1094 udc_write(csr2
, S3C2410_UDC_IN_CSR2_REG
);
1096 /* don't flush in fifo or it will cause endpoint interrupt */
1097 csr1
= S3C2410_UDC_ICSR1_CLRDT
;
1098 csr2
= S3C2410_UDC_ICSR2_DMAIEN
;
1100 udc_write(ep
->num
, S3C2410_UDC_INDEX_REG
);
1101 udc_write(csr1
, S3C2410_UDC_IN_CSR1_REG
);
1102 udc_write(ep
->num
, S3C2410_UDC_INDEX_REG
);
1103 udc_write(csr2
, S3C2410_UDC_IN_CSR2_REG
);
1105 csr1
= S3C2410_UDC_OCSR1_FFLUSH
| S3C2410_UDC_OCSR1_CLRDT
;
1106 csr2
= S3C2410_UDC_OCSR2_DMAIEN
;
1108 udc_write(ep
->num
, S3C2410_UDC_INDEX_REG
);
1109 udc_write(csr1
, S3C2410_UDC_OUT_CSR1_REG
);
1110 udc_write(ep
->num
, S3C2410_UDC_INDEX_REG
);
1111 udc_write(csr2
, S3C2410_UDC_OUT_CSR2_REG
);
1115 int_en_reg
= udc_read(S3C2410_UDC_EP_INT_EN_REG
);
1116 udc_write(int_en_reg
| (1 << ep
->num
), S3C2410_UDC_EP_INT_EN_REG
);
1118 /* print some debug message */
1119 tmp
= desc
->bEndpointAddress
;
1120 dprintk (DEBUG_NORMAL
, "enable %s(%d) ep%x%s-blk max %02x\n",
1121 _ep
->name
,ep
->num
, tmp
,
1122 desc
->bEndpointAddress
& USB_DIR_IN
? "in" : "out", max
);
1124 local_irq_restore (flags
);
1125 s3c2410_udc_set_halt(_ep
, 0);
1131 * s3c2410_udc_ep_disable
1133 static int s3c2410_udc_ep_disable(struct usb_ep
*_ep
)
1135 struct s3c2410_ep
*ep
= to_s3c2410_ep(_ep
);
1136 unsigned long flags
;
1139 if (!_ep
|| !ep
->ep
.desc
) {
1140 dprintk(DEBUG_NORMAL
, "%s not enabled\n",
1141 _ep
? ep
->ep
.name
: NULL
);
1145 local_irq_save(flags
);
1147 dprintk(DEBUG_NORMAL
, "ep_disable: %s\n", _ep
->name
);
1152 s3c2410_udc_nuke (ep
->dev
, ep
, -ESHUTDOWN
);
1155 int_en_reg
= udc_read(S3C2410_UDC_EP_INT_EN_REG
);
1156 udc_write(int_en_reg
& ~(1<<ep
->num
), S3C2410_UDC_EP_INT_EN_REG
);
1158 local_irq_restore(flags
);
1160 dprintk(DEBUG_NORMAL
, "%s disabled\n", _ep
->name
);
1166 * s3c2410_udc_alloc_request
1168 static struct usb_request
*
1169 s3c2410_udc_alloc_request(struct usb_ep
*_ep
, gfp_t mem_flags
)
1171 struct s3c2410_request
*req
;
1173 dprintk(DEBUG_VERBOSE
,"%s(%p,%d)\n", __func__
, _ep
, mem_flags
);
1178 req
= kzalloc (sizeof(struct s3c2410_request
), mem_flags
);
1182 INIT_LIST_HEAD (&req
->queue
);
1187 * s3c2410_udc_free_request
1190 s3c2410_udc_free_request(struct usb_ep
*_ep
, struct usb_request
*_req
)
1192 struct s3c2410_ep
*ep
= to_s3c2410_ep(_ep
);
1193 struct s3c2410_request
*req
= to_s3c2410_req(_req
);
1195 dprintk(DEBUG_VERBOSE
, "%s(%p,%p)\n", __func__
, _ep
, _req
);
1197 if (!ep
|| !_req
|| (!ep
->ep
.desc
&& _ep
->name
!= ep0name
))
1200 WARN_ON (!list_empty (&req
->queue
));
1207 static int s3c2410_udc_queue(struct usb_ep
*_ep
, struct usb_request
*_req
,
1210 struct s3c2410_request
*req
= to_s3c2410_req(_req
);
1211 struct s3c2410_ep
*ep
= to_s3c2410_ep(_ep
);
1212 struct s3c2410_udc
*dev
;
1215 unsigned long flags
;
1217 if (unlikely(!_ep
|| (!ep
->ep
.desc
&& ep
->ep
.name
!= ep0name
))) {
1218 dprintk(DEBUG_NORMAL
, "%s: invalid args\n", __func__
);
1223 if (unlikely (!dev
->driver
1224 || dev
->gadget
.speed
== USB_SPEED_UNKNOWN
)) {
1228 local_irq_save (flags
);
1230 if (unlikely(!_req
|| !_req
->complete
1231 || !_req
->buf
|| !list_empty(&req
->queue
))) {
1233 dprintk(DEBUG_NORMAL
, "%s: 1 X X X\n", __func__
);
1235 dprintk(DEBUG_NORMAL
, "%s: 0 %01d %01d %01d\n",
1236 __func__
, !_req
->complete
,!_req
->buf
,
1237 !list_empty(&req
->queue
));
1240 local_irq_restore(flags
);
1244 _req
->status
= -EINPROGRESS
;
1247 dprintk(DEBUG_VERBOSE
, "%s: ep%x len %d\n",
1248 __func__
, ep
->bEndpointAddress
, _req
->length
);
1250 if (ep
->bEndpointAddress
) {
1251 udc_write(ep
->bEndpointAddress
& 0x7F, S3C2410_UDC_INDEX_REG
);
1253 ep_csr
= udc_read((ep
->bEndpointAddress
& USB_DIR_IN
)
1254 ? S3C2410_UDC_IN_CSR1_REG
1255 : S3C2410_UDC_OUT_CSR1_REG
);
1256 fifo_count
= s3c2410_udc_fifo_count_out();
1258 udc_write(0, S3C2410_UDC_INDEX_REG
);
1259 ep_csr
= udc_read(S3C2410_UDC_IN_CSR1_REG
);
1260 fifo_count
= s3c2410_udc_fifo_count_out();
1263 /* kickstart this i/o queue? */
1264 if (list_empty(&ep
->queue
) && !ep
->halted
) {
1265 if (ep
->bEndpointAddress
== 0 /* ep0 */) {
1266 switch (dev
->ep0state
) {
1267 case EP0_IN_DATA_PHASE
:
1268 if (!(ep_csr
&S3C2410_UDC_EP0_CSR_IPKRDY
)
1269 && s3c2410_udc_write_fifo(ep
,
1271 dev
->ep0state
= EP0_IDLE
;
1276 case EP0_OUT_DATA_PHASE
:
1278 || ((ep_csr
& S3C2410_UDC_OCSR1_PKTRDY
)
1279 && s3c2410_udc_read_fifo(ep
,
1281 dev
->ep0state
= EP0_IDLE
;
1287 local_irq_restore(flags
);
1290 } else if ((ep
->bEndpointAddress
& USB_DIR_IN
) != 0
1291 && (!(ep_csr
&S3C2410_UDC_OCSR1_PKTRDY
))
1292 && s3c2410_udc_write_fifo(ep
, req
)) {
1294 } else if ((ep_csr
& S3C2410_UDC_OCSR1_PKTRDY
)
1296 && s3c2410_udc_read_fifo(ep
, req
)) {
1301 /* pio or dma irq handler advances the queue. */
1302 if (likely (req
!= 0))
1303 list_add_tail(&req
->queue
, &ep
->queue
);
1305 local_irq_restore(flags
);
1307 dprintk(DEBUG_VERBOSE
, "%s ok\n", __func__
);
1312 * s3c2410_udc_dequeue
1314 static int s3c2410_udc_dequeue(struct usb_ep
*_ep
, struct usb_request
*_req
)
1316 struct s3c2410_ep
*ep
= to_s3c2410_ep(_ep
);
1317 struct s3c2410_udc
*udc
;
1318 int retval
= -EINVAL
;
1319 unsigned long flags
;
1320 struct s3c2410_request
*req
= NULL
;
1322 dprintk(DEBUG_VERBOSE
, "%s(%p,%p)\n", __func__
, _ep
, _req
);
1324 if (!the_controller
->driver
)
1330 udc
= to_s3c2410_udc(ep
->gadget
);
1332 local_irq_save (flags
);
1334 list_for_each_entry (req
, &ep
->queue
, queue
) {
1335 if (&req
->req
== _req
) {
1336 list_del_init (&req
->queue
);
1337 _req
->status
= -ECONNRESET
;
1344 dprintk(DEBUG_VERBOSE
,
1345 "dequeued req %p from %s, len %d buf %p\n",
1346 req
, _ep
->name
, _req
->length
, _req
->buf
);
1348 s3c2410_udc_done(ep
, req
, -ECONNRESET
);
1351 local_irq_restore (flags
);
1356 * s3c2410_udc_set_halt
1358 static int s3c2410_udc_set_halt(struct usb_ep
*_ep
, int value
)
1360 struct s3c2410_ep
*ep
= to_s3c2410_ep(_ep
);
1362 unsigned long flags
;
1365 if (unlikely(!_ep
|| (!ep
->ep
.desc
&& ep
->ep
.name
!= ep0name
))) {
1366 dprintk(DEBUG_NORMAL
, "%s: inval 2\n", __func__
);
1370 local_irq_save (flags
);
1372 idx
= ep
->bEndpointAddress
& 0x7F;
1375 s3c2410_udc_set_ep0_ss(base_addr
);
1376 s3c2410_udc_set_ep0_de_out(base_addr
);
1378 udc_write(idx
, S3C2410_UDC_INDEX_REG
);
1379 ep_csr
= udc_read((ep
->bEndpointAddress
&USB_DIR_IN
)
1380 ? S3C2410_UDC_IN_CSR1_REG
1381 : S3C2410_UDC_OUT_CSR1_REG
);
1383 if ((ep
->bEndpointAddress
& USB_DIR_IN
) != 0) {
1385 udc_write(ep_csr
| S3C2410_UDC_ICSR1_SENDSTL
,
1386 S3C2410_UDC_IN_CSR1_REG
);
1388 ep_csr
&= ~S3C2410_UDC_ICSR1_SENDSTL
;
1389 udc_write(ep_csr
, S3C2410_UDC_IN_CSR1_REG
);
1390 ep_csr
|= S3C2410_UDC_ICSR1_CLRDT
;
1391 udc_write(ep_csr
, S3C2410_UDC_IN_CSR1_REG
);
1395 udc_write(ep_csr
| S3C2410_UDC_OCSR1_SENDSTL
,
1396 S3C2410_UDC_OUT_CSR1_REG
);
1398 ep_csr
&= ~S3C2410_UDC_OCSR1_SENDSTL
;
1399 udc_write(ep_csr
, S3C2410_UDC_OUT_CSR1_REG
);
1400 ep_csr
|= S3C2410_UDC_OCSR1_CLRDT
;
1401 udc_write(ep_csr
, S3C2410_UDC_OUT_CSR1_REG
);
1406 ep
->halted
= value
? 1 : 0;
1407 local_irq_restore (flags
);
1412 static const struct usb_ep_ops s3c2410_ep_ops
= {
1413 .enable
= s3c2410_udc_ep_enable
,
1414 .disable
= s3c2410_udc_ep_disable
,
1416 .alloc_request
= s3c2410_udc_alloc_request
,
1417 .free_request
= s3c2410_udc_free_request
,
1419 .queue
= s3c2410_udc_queue
,
1420 .dequeue
= s3c2410_udc_dequeue
,
1422 .set_halt
= s3c2410_udc_set_halt
,
1425 /*------------------------- usb_gadget_ops ----------------------------------*/
1428 * s3c2410_udc_get_frame
1430 static int s3c2410_udc_get_frame(struct usb_gadget
*_gadget
)
1434 dprintk(DEBUG_VERBOSE
, "%s()\n", __func__
);
1436 tmp
= udc_read(S3C2410_UDC_FRAME_NUM2_REG
) << 8;
1437 tmp
|= udc_read(S3C2410_UDC_FRAME_NUM1_REG
);
1442 * s3c2410_udc_wakeup
1444 static int s3c2410_udc_wakeup(struct usb_gadget
*_gadget
)
1446 dprintk(DEBUG_NORMAL
, "%s()\n", __func__
);
1451 * s3c2410_udc_set_selfpowered
1453 static int s3c2410_udc_set_selfpowered(struct usb_gadget
*gadget
, int value
)
1455 struct s3c2410_udc
*udc
= to_s3c2410_udc(gadget
);
1457 dprintk(DEBUG_NORMAL
, "%s()\n", __func__
);
1460 udc
->devstatus
|= (1 << USB_DEVICE_SELF_POWERED
);
1462 udc
->devstatus
&= ~(1 << USB_DEVICE_SELF_POWERED
);
1467 static void s3c2410_udc_disable(struct s3c2410_udc
*dev
);
1468 static void s3c2410_udc_enable(struct s3c2410_udc
*dev
);
1470 static int s3c2410_udc_set_pullup(struct s3c2410_udc
*udc
, int is_on
)
1472 dprintk(DEBUG_NORMAL
, "%s()\n", __func__
);
1474 if (udc_info
&& (udc_info
->udc_command
||
1475 gpio_is_valid(udc_info
->pullup_pin
))) {
1478 s3c2410_udc_enable(udc
);
1480 if (udc
->gadget
.speed
!= USB_SPEED_UNKNOWN
) {
1481 if (udc
->driver
&& udc
->driver
->disconnect
)
1482 udc
->driver
->disconnect(&udc
->gadget
);
1485 s3c2410_udc_disable(udc
);
1494 static int s3c2410_udc_vbus_session(struct usb_gadget
*gadget
, int is_active
)
1496 struct s3c2410_udc
*udc
= to_s3c2410_udc(gadget
);
1498 dprintk(DEBUG_NORMAL
, "%s()\n", __func__
);
1500 udc
->vbus
= (is_active
!= 0);
1501 s3c2410_udc_set_pullup(udc
, is_active
);
1505 static int s3c2410_udc_pullup(struct usb_gadget
*gadget
, int is_on
)
1507 struct s3c2410_udc
*udc
= to_s3c2410_udc(gadget
);
1509 dprintk(DEBUG_NORMAL
, "%s()\n", __func__
);
1511 s3c2410_udc_set_pullup(udc
, is_on
? 0 : 1);
1515 static irqreturn_t
s3c2410_udc_vbus_irq(int irq
, void *_dev
)
1517 struct s3c2410_udc
*dev
= _dev
;
1520 dprintk(DEBUG_NORMAL
, "%s()\n", __func__
);
1522 value
= gpio_get_value(udc_info
->vbus_pin
) ? 1 : 0;
1523 if (udc_info
->vbus_pin_inverted
)
1526 if (value
!= dev
->vbus
)
1527 s3c2410_udc_vbus_session(&dev
->gadget
, value
);
1532 static int s3c2410_vbus_draw(struct usb_gadget
*_gadget
, unsigned ma
)
1534 dprintk(DEBUG_NORMAL
, "%s()\n", __func__
);
1536 if (udc_info
&& udc_info
->vbus_draw
) {
1537 udc_info
->vbus_draw(ma
);
1544 static int s3c2410_udc_start(struct usb_gadget_driver
*driver
,
1545 int (*bind
)(struct usb_gadget
*));
1546 static int s3c2410_udc_stop(struct usb_gadget_driver
*driver
);
1548 static const struct usb_gadget_ops s3c2410_ops
= {
1549 .get_frame
= s3c2410_udc_get_frame
,
1550 .wakeup
= s3c2410_udc_wakeup
,
1551 .set_selfpowered
= s3c2410_udc_set_selfpowered
,
1552 .pullup
= s3c2410_udc_pullup
,
1553 .vbus_session
= s3c2410_udc_vbus_session
,
1554 .vbus_draw
= s3c2410_vbus_draw
,
1555 .start
= s3c2410_udc_start
,
1556 .stop
= s3c2410_udc_stop
,
1559 static void s3c2410_udc_command(enum s3c2410_udc_cmd_e cmd
)
1564 if (udc_info
->udc_command
) {
1565 udc_info
->udc_command(cmd
);
1566 } else if (gpio_is_valid(udc_info
->pullup_pin
)) {
1570 case S3C2410_UDC_P_ENABLE
:
1573 case S3C2410_UDC_P_DISABLE
:
1579 value
^= udc_info
->pullup_pin_inverted
;
1581 gpio_set_value(udc_info
->pullup_pin
, value
);
1585 /*------------------------- gadget driver handling---------------------------*/
1587 * s3c2410_udc_disable
1589 static void s3c2410_udc_disable(struct s3c2410_udc
*dev
)
1591 dprintk(DEBUG_NORMAL
, "%s()\n", __func__
);
1593 /* Disable all interrupts */
1594 udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG
);
1595 udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG
);
1597 /* Clear the interrupt registers */
1598 udc_write(S3C2410_UDC_USBINT_RESET
1599 | S3C2410_UDC_USBINT_RESUME
1600 | S3C2410_UDC_USBINT_SUSPEND
,
1601 S3C2410_UDC_USB_INT_REG
);
1603 udc_write(0x1F, S3C2410_UDC_EP_INT_REG
);
1605 /* Good bye, cruel world */
1606 s3c2410_udc_command(S3C2410_UDC_P_DISABLE
);
1608 /* Set speed to unknown */
1609 dev
->gadget
.speed
= USB_SPEED_UNKNOWN
;
1613 * s3c2410_udc_reinit
1615 static void s3c2410_udc_reinit(struct s3c2410_udc
*dev
)
1619 /* device/ep0 records init */
1620 INIT_LIST_HEAD (&dev
->gadget
.ep_list
);
1621 INIT_LIST_HEAD (&dev
->gadget
.ep0
->ep_list
);
1622 dev
->ep0state
= EP0_IDLE
;
1624 for (i
= 0; i
< S3C2410_ENDPOINTS
; i
++) {
1625 struct s3c2410_ep
*ep
= &dev
->ep
[i
];
1628 list_add_tail (&ep
->ep
.ep_list
, &dev
->gadget
.ep_list
);
1633 INIT_LIST_HEAD (&ep
->queue
);
1638 * s3c2410_udc_enable
1640 static void s3c2410_udc_enable(struct s3c2410_udc
*dev
)
1644 dprintk(DEBUG_NORMAL
, "s3c2410_udc_enable called\n");
1646 /* dev->gadget.speed = USB_SPEED_UNKNOWN; */
1647 dev
->gadget
.speed
= USB_SPEED_FULL
;
1649 /* Set MAXP for all endpoints */
1650 for (i
= 0; i
< S3C2410_ENDPOINTS
; i
++) {
1651 udc_write(i
, S3C2410_UDC_INDEX_REG
);
1652 udc_write((dev
->ep
[i
].ep
.maxpacket
& 0x7ff) >> 3,
1653 S3C2410_UDC_MAXP_REG
);
1656 /* Set default power state */
1657 udc_write(DEFAULT_POWER_STATE
, S3C2410_UDC_PWR_REG
);
1659 /* Enable reset and suspend interrupt interrupts */
1660 udc_write(S3C2410_UDC_USBINT_RESET
| S3C2410_UDC_USBINT_SUSPEND
,
1661 S3C2410_UDC_USB_INT_EN_REG
);
1663 /* Enable ep0 interrupt */
1664 udc_write(S3C2410_UDC_INT_EP0
, S3C2410_UDC_EP_INT_EN_REG
);
1666 /* time to say "hello, world" */
1667 s3c2410_udc_command(S3C2410_UDC_P_ENABLE
);
1670 static int s3c2410_udc_start(struct usb_gadget_driver
*driver
,
1671 int (*bind
)(struct usb_gadget
*))
1673 struct s3c2410_udc
*udc
= the_controller
;
1676 dprintk(DEBUG_NORMAL
, "%s() '%s'\n", __func__
, driver
->driver
.name
);
1685 if (!bind
|| !driver
->setup
|| driver
->max_speed
< USB_SPEED_FULL
) {
1686 printk(KERN_ERR
"Invalid driver: bind %p setup %p speed %d\n",
1687 bind
, driver
->setup
, driver
->max_speed
);
1691 if (!driver
->unbind
) {
1692 printk(KERN_ERR
"Invalid driver: no unbind method\n");
1697 /* Hook the driver */
1698 udc
->driver
= driver
;
1699 udc
->gadget
.dev
.driver
= &driver
->driver
;
1701 /* Bind the driver */
1702 if ((retval
= device_add(&udc
->gadget
.dev
)) != 0) {
1703 printk(KERN_ERR
"Error in device_add() : %d\n",retval
);
1704 goto register_error
;
1707 dprintk(DEBUG_NORMAL
, "binding gadget driver '%s'\n",
1708 driver
->driver
.name
);
1710 if ((retval
= bind(&udc
->gadget
)) != 0) {
1711 device_del(&udc
->gadget
.dev
);
1712 goto register_error
;
1716 s3c2410_udc_enable(udc
);
1722 udc
->gadget
.dev
.driver
= NULL
;
1726 static int s3c2410_udc_stop(struct usb_gadget_driver
*driver
)
1728 struct s3c2410_udc
*udc
= the_controller
;
1733 if (!driver
|| driver
!= udc
->driver
|| !driver
->unbind
)
1736 dprintk(DEBUG_NORMAL
, "usb_gadget_unregister_driver() '%s'\n",
1737 driver
->driver
.name
);
1739 /* report disconnect */
1740 if (driver
->disconnect
)
1741 driver
->disconnect(&udc
->gadget
);
1743 driver
->unbind(&udc
->gadget
);
1745 device_del(&udc
->gadget
.dev
);
1749 s3c2410_udc_disable(udc
);
1754 /*---------------------------------------------------------------------------*/
1755 static struct s3c2410_udc memory
= {
1757 .ops
= &s3c2410_ops
,
1758 .ep0
= &memory
.ep
[0].ep
,
1759 .name
= gadget_name
,
1761 .init_name
= "gadget",
1765 /* control endpoint */
1770 .ops
= &s3c2410_ep_ops
,
1771 .maxpacket
= EP0_FIFO_SIZE
,
1776 /* first group of endpoints */
1781 .ops
= &s3c2410_ep_ops
,
1782 .maxpacket
= EP_FIFO_SIZE
,
1785 .fifo_size
= EP_FIFO_SIZE
,
1786 .bEndpointAddress
= 1,
1787 .bmAttributes
= USB_ENDPOINT_XFER_BULK
,
1793 .ops
= &s3c2410_ep_ops
,
1794 .maxpacket
= EP_FIFO_SIZE
,
1797 .fifo_size
= EP_FIFO_SIZE
,
1798 .bEndpointAddress
= 2,
1799 .bmAttributes
= USB_ENDPOINT_XFER_BULK
,
1805 .ops
= &s3c2410_ep_ops
,
1806 .maxpacket
= EP_FIFO_SIZE
,
1809 .fifo_size
= EP_FIFO_SIZE
,
1810 .bEndpointAddress
= 3,
1811 .bmAttributes
= USB_ENDPOINT_XFER_BULK
,
1817 .ops
= &s3c2410_ep_ops
,
1818 .maxpacket
= EP_FIFO_SIZE
,
1821 .fifo_size
= EP_FIFO_SIZE
,
1822 .bEndpointAddress
= 4,
1823 .bmAttributes
= USB_ENDPOINT_XFER_BULK
,
1829 * probe - binds to the platform device
1831 static int s3c2410_udc_probe(struct platform_device
*pdev
)
1833 struct s3c2410_udc
*udc
= &memory
;
1834 struct device
*dev
= &pdev
->dev
;
1838 dev_dbg(dev
, "%s()\n", __func__
);
1840 usb_bus_clock
= clk_get(NULL
, "usb-bus-gadget");
1841 if (IS_ERR(usb_bus_clock
)) {
1842 dev_err(dev
, "failed to get usb bus clock source\n");
1843 return PTR_ERR(usb_bus_clock
);
1846 clk_enable(usb_bus_clock
);
1848 udc_clock
= clk_get(NULL
, "usb-device");
1849 if (IS_ERR(udc_clock
)) {
1850 dev_err(dev
, "failed to get udc clock source\n");
1851 return PTR_ERR(udc_clock
);
1854 clk_enable(udc_clock
);
1858 dev_dbg(dev
, "got and enabled clocks\n");
1860 if (strncmp(pdev
->name
, "s3c2440", 7) == 0) {
1861 dev_info(dev
, "S3C2440: increasing FIFO to 128 bytes\n");
1862 memory
.ep
[1].fifo_size
= S3C2440_EP_FIFO_SIZE
;
1863 memory
.ep
[2].fifo_size
= S3C2440_EP_FIFO_SIZE
;
1864 memory
.ep
[3].fifo_size
= S3C2440_EP_FIFO_SIZE
;
1865 memory
.ep
[4].fifo_size
= S3C2440_EP_FIFO_SIZE
;
1868 spin_lock_init (&udc
->lock
);
1869 udc_info
= pdev
->dev
.platform_data
;
1871 rsrc_start
= S3C2410_PA_USBDEV
;
1872 rsrc_len
= S3C24XX_SZ_USBDEV
;
1874 if (!request_mem_region(rsrc_start
, rsrc_len
, gadget_name
))
1877 base_addr
= ioremap(rsrc_start
, rsrc_len
);
1883 device_initialize(&udc
->gadget
.dev
);
1884 udc
->gadget
.dev
.parent
= &pdev
->dev
;
1885 udc
->gadget
.dev
.dma_mask
= pdev
->dev
.dma_mask
;
1887 the_controller
= udc
;
1888 platform_set_drvdata(pdev
, udc
);
1890 s3c2410_udc_disable(udc
);
1891 s3c2410_udc_reinit(udc
);
1893 /* irq setup after old hardware state is cleaned up */
1894 retval
= request_irq(IRQ_USBD
, s3c2410_udc_irq
,
1895 0, gadget_name
, udc
);
1898 dev_err(dev
, "cannot get irq %i, err %d\n", IRQ_USBD
, retval
);
1903 dev_dbg(dev
, "got irq %i\n", IRQ_USBD
);
1905 if (udc_info
&& udc_info
->vbus_pin
> 0) {
1906 retval
= gpio_request(udc_info
->vbus_pin
, "udc vbus");
1908 dev_err(dev
, "cannot claim vbus pin\n");
1912 irq
= gpio_to_irq(udc_info
->vbus_pin
);
1914 dev_err(dev
, "no irq for gpio vbus pin\n");
1915 goto err_gpio_claim
;
1918 retval
= request_irq(irq
, s3c2410_udc_vbus_irq
,
1920 | IRQF_TRIGGER_FALLING
| IRQF_SHARED
,
1924 dev_err(dev
, "can't get vbus irq %d, err %d\n",
1927 goto err_gpio_claim
;
1930 dev_dbg(dev
, "got irq %i\n", irq
);
1935 if (udc_info
&& !udc_info
->udc_command
&&
1936 gpio_is_valid(udc_info
->pullup_pin
)) {
1938 retval
= gpio_request_one(udc_info
->pullup_pin
,
1939 udc_info
->vbus_pin_inverted
?
1940 GPIOF_OUT_INIT_HIGH
: GPIOF_OUT_INIT_LOW
,
1946 retval
= usb_add_gadget_udc(&pdev
->dev
, &udc
->gadget
);
1950 if (s3c2410_udc_debugfs_root
) {
1951 udc
->regs_info
= debugfs_create_file("registers", S_IRUGO
,
1952 s3c2410_udc_debugfs_root
,
1953 udc
, &s3c2410_udc_debugfs_fops
);
1954 if (!udc
->regs_info
)
1955 dev_warn(dev
, "debugfs file creation failed\n");
1958 dev_dbg(dev
, "probe ok\n");
1963 if (udc_info
&& !udc_info
->udc_command
&&
1964 gpio_is_valid(udc_info
->pullup_pin
))
1965 gpio_free(udc_info
->pullup_pin
);
1967 if (udc_info
&& udc_info
->vbus_pin
> 0)
1968 free_irq(gpio_to_irq(udc_info
->vbus_pin
), udc
);
1970 if (udc_info
&& udc_info
->vbus_pin
> 0)
1971 gpio_free(udc_info
->vbus_pin
);
1973 free_irq(IRQ_USBD
, udc
);
1977 release_mem_region(rsrc_start
, rsrc_len
);
1983 * s3c2410_udc_remove
1985 static int s3c2410_udc_remove(struct platform_device
*pdev
)
1987 struct s3c2410_udc
*udc
= platform_get_drvdata(pdev
);
1990 dev_dbg(&pdev
->dev
, "%s()\n", __func__
);
1992 usb_del_gadget_udc(&udc
->gadget
);
1996 debugfs_remove(udc
->regs_info
);
1998 if (udc_info
&& !udc_info
->udc_command
&&
1999 gpio_is_valid(udc_info
->pullup_pin
))
2000 gpio_free(udc_info
->pullup_pin
);
2002 if (udc_info
&& udc_info
->vbus_pin
> 0) {
2003 irq
= gpio_to_irq(udc_info
->vbus_pin
);
2007 free_irq(IRQ_USBD
, udc
);
2010 release_mem_region(rsrc_start
, rsrc_len
);
2012 platform_set_drvdata(pdev
, NULL
);
2014 if (!IS_ERR(udc_clock
) && udc_clock
!= NULL
) {
2015 clk_disable(udc_clock
);
2020 if (!IS_ERR(usb_bus_clock
) && usb_bus_clock
!= NULL
) {
2021 clk_disable(usb_bus_clock
);
2022 clk_put(usb_bus_clock
);
2023 usb_bus_clock
= NULL
;
2026 dev_dbg(&pdev
->dev
, "%s: remove ok\n", __func__
);
2031 static int s3c2410_udc_suspend(struct platform_device
*pdev
, pm_message_t message
)
2033 s3c2410_udc_command(S3C2410_UDC_P_DISABLE
);
2038 static int s3c2410_udc_resume(struct platform_device
*pdev
)
2040 s3c2410_udc_command(S3C2410_UDC_P_ENABLE
);
2045 #define s3c2410_udc_suspend NULL
2046 #define s3c2410_udc_resume NULL
2049 static const struct platform_device_id s3c_udc_ids
[] = {
2050 { "s3c2410-usbgadget", },
2051 { "s3c2440-usbgadget", },
2054 MODULE_DEVICE_TABLE(platform
, s3c_udc_ids
);
2056 static struct platform_driver udc_driver_24x0
= {
2058 .name
= "s3c24x0-usbgadget",
2059 .owner
= THIS_MODULE
,
2061 .probe
= s3c2410_udc_probe
,
2062 .remove
= s3c2410_udc_remove
,
2063 .suspend
= s3c2410_udc_suspend
,
2064 .resume
= s3c2410_udc_resume
,
2065 .id_table
= s3c_udc_ids
,
2068 static int __init
udc_init(void)
2072 dprintk(DEBUG_NORMAL
, "%s: version %s\n", gadget_name
, DRIVER_VERSION
);
2074 s3c2410_udc_debugfs_root
= debugfs_create_dir(gadget_name
, NULL
);
2075 if (IS_ERR(s3c2410_udc_debugfs_root
)) {
2076 printk(KERN_ERR
"%s: debugfs dir creation failed %ld\n",
2077 gadget_name
, PTR_ERR(s3c2410_udc_debugfs_root
));
2078 s3c2410_udc_debugfs_root
= NULL
;
2081 retval
= platform_driver_register(&udc_driver_24x0
);
2088 debugfs_remove(s3c2410_udc_debugfs_root
);
2092 static void __exit
udc_exit(void)
2094 platform_driver_unregister(&udc_driver_24x0
);
2095 debugfs_remove(s3c2410_udc_debugfs_root
);
2098 module_init(udc_init
);
2099 module_exit(udc_exit
);
2101 MODULE_AUTHOR(DRIVER_AUTHOR
);
2102 MODULE_DESCRIPTION(DRIVER_DESC
);
2103 MODULE_VERSION(DRIVER_VERSION
);
2104 MODULE_LICENSE("GPL");