2 * Toshiba TC86C001 ("Goku-S") USB Device Controller driver
4 * Copyright (C) 2000-2002 Lineo
5 * by Stuart Lynne, Tom Rushworth, and Bruce Balden
6 * Copyright (C) 2002 Toshiba Corporation
7 * Copyright (C) 2003 MontaVista Software (source@mvista.com)
9 * This file is licensed under the terms of the GNU General Public
10 * License version 2. This program is licensed "as is" without any
11 * warranty of any kind, whether express or implied.
15 * This device has ep0 and three semi-configurable bulk/interrupt endpoints.
17 * - Endpoint numbering is fixed: ep{1,2,3}-bulk
18 * - Gadget drivers can choose ep maxpacket (8/16/32/64)
19 * - Gadget drivers can choose direction (IN, OUT)
20 * - DMA works with ep1 (OUT transfers) and ep2 (IN transfers).
23 // #define VERBOSE /* extra debug messages (success too) */
24 // #define USB_TRACE /* packet-level success messages */
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/pci.h>
29 #include <linux/delay.h>
30 #include <linux/ioport.h>
31 #include <linux/slab.h>
32 #include <linux/errno.h>
33 #include <linux/init.h>
34 #include <linux/timer.h>
35 #include <linux/list.h>
36 #include <linux/interrupt.h>
37 #include <linux/proc_fs.h>
38 #include <linux/device.h>
39 #include <linux/usb/ch9.h>
40 #include <linux/usb/gadget.h>
41 #include <linux/prefetch.h>
43 #include <asm/byteorder.h>
46 #include <asm/unaligned.h>
51 #define DRIVER_DESC "TC86C001 USB Device Controller"
52 #define DRIVER_VERSION "30-Oct 2003"
54 #define DMA_ADDR_INVALID (~(dma_addr_t)0)
56 static const char driver_name
[] = "goku_udc";
57 static const char driver_desc
[] = DRIVER_DESC
;
59 MODULE_AUTHOR("source@mvista.com");
60 MODULE_DESCRIPTION(DRIVER_DESC
);
61 MODULE_LICENSE("GPL");
65 * IN dma behaves ok under testing, though the IN-dma abort paths don't
66 * seem to behave quite as expected. Used by default.
68 * OUT dma documents design problems handling the common "short packet"
69 * transfer termination policy; it couldn't be enabled by default, even
70 * if the OUT-dma abort problems had a resolution.
72 static unsigned use_dma
= 1;
75 //#include <linux/moduleparam.h>
76 /* "modprobe goku_udc use_dma=1" etc
78 * 1 to use IN dma only (normal operation)
79 * 2 to use IN and OUT dma
81 module_param(use_dma
, uint
, S_IRUGO
);
84 /*-------------------------------------------------------------------------*/
86 static void nuke(struct goku_ep
*, int status
);
89 command(struct goku_udc_regs __iomem
*regs
, int command
, unsigned epnum
)
91 writel(COMMAND_EP(epnum
) | command
, ®s
->Command
);
96 goku_ep_enable(struct usb_ep
*_ep
, const struct usb_endpoint_descriptor
*desc
)
104 ep
= container_of(_ep
, struct goku_ep
, ep
);
106 || desc
->bDescriptorType
!= USB_DT_ENDPOINT
)
109 if (ep
== &dev
->ep
[0])
111 if (!dev
->driver
|| dev
->gadget
.speed
== USB_SPEED_UNKNOWN
)
113 if (ep
->num
!= usb_endpoint_num(desc
))
116 switch (usb_endpoint_type(desc
)) {
117 case USB_ENDPOINT_XFER_BULK
:
118 case USB_ENDPOINT_XFER_INT
:
124 if ((readl(ep
->reg_status
) & EPxSTATUS_EP_MASK
)
125 != EPxSTATUS_EP_INVALID
)
128 /* enabling the no-toggle interrupt mode would need an api hook */
130 max
= get_unaligned_le16(&desc
->wMaxPacketSize
);
140 mode
|= 2 << 1; /* bulk, or intr-with-toggle */
142 /* ep1/ep2 dma direction is chosen early; it works in the other
143 * direction, with pio. be cautious with out-dma.
145 ep
->is_in
= usb_endpoint_dir_in(desc
);
148 ep
->dma
= (use_dma
!= 0) && (ep
->num
== UDC_MSTRD_ENDPOINT
);
150 ep
->dma
= (use_dma
== 2) && (ep
->num
== UDC_MSTWR_ENDPOINT
);
152 DBG(dev
, "%s out-dma hides short packets\n",
156 spin_lock_irqsave(&ep
->dev
->lock
, flags
);
158 /* ep1 and ep2 can do double buffering and/or dma */
160 struct goku_udc_regs __iomem
*regs
= ep
->dev
->regs
;
163 /* double buffer except (for now) with pio in */
164 tmp
= ((ep
->dma
|| !ep
->is_in
)
165 ? 0x10 /* double buffered */
166 : 0x11 /* single buffer */
168 tmp
|= readl(®s
->EPxSingle
);
169 writel(tmp
, ®s
->EPxSingle
);
171 tmp
= (ep
->dma
? 0x10/*dma*/ : 0x11/*pio*/) << ep
->num
;
172 tmp
|= readl(®s
->EPxBCS
);
173 writel(tmp
, ®s
->EPxBCS
);
175 writel(mode
, ep
->reg_mode
);
176 command(ep
->dev
->regs
, COMMAND_RESET
, ep
->num
);
177 ep
->ep
.maxpacket
= max
;
180 spin_unlock_irqrestore(&ep
->dev
->lock
, flags
);
182 DBG(dev
, "enable %s %s %s maxpacket %u\n", ep
->ep
.name
,
183 ep
->is_in
? "IN" : "OUT",
184 ep
->dma
? "dma" : "pio",
190 static void ep_reset(struct goku_udc_regs __iomem
*regs
, struct goku_ep
*ep
)
192 struct goku_udc
*dev
= ep
->dev
;
195 command(regs
, COMMAND_INVALID
, ep
->num
);
197 if (ep
->num
== UDC_MSTWR_ENDPOINT
)
198 dev
->int_enable
&= ~(INT_MSTWREND
200 else if (ep
->num
== UDC_MSTRD_ENDPOINT
)
201 dev
->int_enable
&= ~INT_MSTRDEND
;
202 dev
->int_enable
&= ~INT_EPxDATASET (ep
->num
);
204 dev
->int_enable
&= ~INT_EP0
;
205 writel(dev
->int_enable
, ®s
->int_enable
);
206 readl(®s
->int_enable
);
208 struct goku_udc_regs __iomem
*r
= ep
->dev
->regs
;
211 tmp
= readl(&r
->EPxSingle
);
212 tmp
&= ~(0x11 << ep
->num
);
213 writel(tmp
, &r
->EPxSingle
);
215 tmp
= readl(&r
->EPxBCS
);
216 tmp
&= ~(0x11 << ep
->num
);
217 writel(tmp
, &r
->EPxBCS
);
219 /* reset dma in case we're still using it */
223 master
= readl(®s
->dma_master
) & MST_RW_BITS
;
224 if (ep
->num
== UDC_MSTWR_ENDPOINT
) {
225 master
&= ~MST_W_BITS
;
226 master
|= MST_WR_RESET
;
228 master
&= ~MST_R_BITS
;
229 master
|= MST_RD_RESET
;
231 writel(master
, ®s
->dma_master
);
235 ep
->ep
.maxpacket
= MAX_FIFO_SIZE
;
242 static int goku_ep_disable(struct usb_ep
*_ep
)
245 struct goku_udc
*dev
;
248 ep
= container_of(_ep
, struct goku_ep
, ep
);
249 if (!_ep
|| !ep
->ep
.desc
)
252 if (dev
->ep0state
== EP0_SUSPEND
)
255 VDBG(dev
, "disable %s\n", _ep
->name
);
257 spin_lock_irqsave(&dev
->lock
, flags
);
258 nuke(ep
, -ESHUTDOWN
);
259 ep_reset(dev
->regs
, ep
);
260 spin_unlock_irqrestore(&dev
->lock
, flags
);
265 /*-------------------------------------------------------------------------*/
267 static struct usb_request
*
268 goku_alloc_request(struct usb_ep
*_ep
, gfp_t gfp_flags
)
270 struct goku_request
*req
;
274 req
= kzalloc(sizeof *req
, gfp_flags
);
278 req
->req
.dma
= DMA_ADDR_INVALID
;
279 INIT_LIST_HEAD(&req
->queue
);
284 goku_free_request(struct usb_ep
*_ep
, struct usb_request
*_req
)
286 struct goku_request
*req
;
291 req
= container_of(_req
, struct goku_request
, req
);
292 WARN_ON(!list_empty(&req
->queue
));
296 /*-------------------------------------------------------------------------*/
299 done(struct goku_ep
*ep
, struct goku_request
*req
, int status
)
301 struct goku_udc
*dev
;
302 unsigned stopped
= ep
->stopped
;
304 list_del_init(&req
->queue
);
306 if (likely(req
->req
.status
== -EINPROGRESS
))
307 req
->req
.status
= status
;
309 status
= req
->req
.status
;
314 usb_gadget_unmap_request(&dev
->gadget
, &req
->req
, ep
->is_in
);
317 if (status
&& status
!= -ESHUTDOWN
)
319 VDBG(dev
, "complete %s req %p stat %d len %u/%u\n",
320 ep
->ep
.name
, &req
->req
, status
,
321 req
->req
.actual
, req
->req
.length
);
323 /* don't modify queue heads during completion callback */
325 spin_unlock(&dev
->lock
);
326 req
->req
.complete(&ep
->ep
, &req
->req
);
327 spin_lock(&dev
->lock
);
328 ep
->stopped
= stopped
;
331 /*-------------------------------------------------------------------------*/
334 write_packet(u32 __iomem
*fifo
, u8
*buf
, struct goku_request
*req
, unsigned max
)
336 unsigned length
, count
;
338 length
= min(req
->req
.length
- req
->req
.actual
, max
);
339 req
->req
.actual
+= length
;
342 while (likely(count
--))
343 writel(*buf
++, fifo
);
347 // return: 0 = still running, 1 = completed, negative = errno
348 static int write_fifo(struct goku_ep
*ep
, struct goku_request
*req
)
350 struct goku_udc
*dev
= ep
->dev
;
356 tmp
= readl(&dev
->regs
->DataSet
);
357 buf
= req
->req
.buf
+ req
->req
.actual
;
361 if (unlikely(ep
->num
== 0 && dev
->ep0state
!= EP0_IN
))
364 /* NOTE: just single-buffered PIO-IN for now. */
365 if (unlikely((tmp
& DATASET_A(ep
->num
)) != 0))
368 /* clear our "packet available" irq */
370 writel(~INT_EPxDATASET(ep
->num
), &dev
->regs
->int_status
);
372 count
= write_packet(ep
->reg_fifo
, buf
, req
, ep
->ep
.maxpacket
);
374 /* last packet often short (sometimes a zlp, especially on ep0) */
375 if (unlikely(count
!= ep
->ep
.maxpacket
)) {
376 writel(~(1<<ep
->num
), &dev
->regs
->EOP
);
378 dev
->ep
[0].stopped
= 1;
379 dev
->ep0state
= EP0_STATUS
;
383 if (likely(req
->req
.length
!= req
->req
.actual
)
389 #if 0 /* printk seemed to trash is_last...*/
391 VDBG(dev
, "wrote %s %u bytes%s IN %u left %p\n",
392 ep
->ep
.name
, count
, is_last
? "/last" : "",
393 req
->req
.length
- req
->req
.actual
, req
);
396 /* requests complete when all IN data is in the FIFO,
397 * or sometimes later, if a zlp was needed.
407 static int read_fifo(struct goku_ep
*ep
, struct goku_request
*req
)
409 struct goku_udc_regs __iomem
*regs
;
412 unsigned bufferspace
, is_short
, dbuff
;
414 regs
= ep
->dev
->regs
;
416 buf
= req
->req
.buf
+ req
->req
.actual
;
419 if (unlikely(ep
->num
== 0 && ep
->dev
->ep0state
!= EP0_OUT
))
422 dbuff
= (ep
->num
== 1 || ep
->num
== 2);
424 /* ack dataset irq matching the status we'll handle */
426 writel(~INT_EPxDATASET(ep
->num
), ®s
->int_status
);
428 set
= readl(®s
->DataSet
) & DATASET_AB(ep
->num
);
429 size
= readl(®s
->EPxSizeLA
[ep
->num
]);
430 bufferspace
= req
->req
.length
- req
->req
.actual
;
432 /* usually do nothing without an OUT packet */
433 if (likely(ep
->num
!= 0 || bufferspace
!= 0)) {
434 if (unlikely(set
== 0))
436 /* use ep1/ep2 double-buffering for OUT */
437 if (!(size
& PACKET_ACTIVE
))
438 size
= readl(®s
->EPxSizeLB
[ep
->num
]);
439 if (!(size
& PACKET_ACTIVE
)) /* "can't happen" */
441 size
&= DATASIZE
; /* EPxSizeH == 0 */
443 /* ep0out no-out-data case for set_config, etc */
447 /* read all bytes from this packet */
448 req
->req
.actual
+= size
;
449 is_short
= (size
< ep
->ep
.maxpacket
);
451 VDBG(ep
->dev
, "read %s %u bytes%s OUT req %p %u/%u\n",
452 ep
->ep
.name
, size
, is_short
? "/S" : "",
453 req
, req
->req
.actual
, req
->req
.length
);
455 while (likely(size
-- != 0)) {
456 u8 byte
= (u8
) readl(ep
->reg_fifo
);
458 if (unlikely(bufferspace
== 0)) {
459 /* this happens when the driver's buffer
460 * is smaller than what the host sent.
461 * discard the extra data in this packet.
463 if (req
->req
.status
!= -EOVERFLOW
)
464 DBG(ep
->dev
, "%s overflow %u\n",
466 req
->req
.status
= -EOVERFLOW
;
474 if (unlikely(is_short
|| req
->req
.actual
== req
->req
.length
)) {
475 if (unlikely(ep
->num
== 0)) {
476 /* non-control endpoints now usable? */
477 if (ep
->dev
->req_config
)
478 writel(ep
->dev
->configured
479 ? USBSTATE_CONFIGURED
482 /* ep0out status stage */
483 writel(~(1<<0), ®s
->EOP
);
485 ep
->dev
->ep0state
= EP0_STATUS
;
489 /* empty the second buffer asap */
490 if (dbuff
&& !list_empty(&ep
->queue
)) {
491 req
= list_entry(ep
->queue
.next
,
492 struct goku_request
, queue
);
502 pio_irq_enable(struct goku_udc
*dev
,
503 struct goku_udc_regs __iomem
*regs
, int epnum
)
505 dev
->int_enable
|= INT_EPxDATASET (epnum
);
506 writel(dev
->int_enable
, ®s
->int_enable
);
507 /* write may still be posted */
511 pio_irq_disable(struct goku_udc
*dev
,
512 struct goku_udc_regs __iomem
*regs
, int epnum
)
514 dev
->int_enable
&= ~INT_EPxDATASET (epnum
);
515 writel(dev
->int_enable
, ®s
->int_enable
);
516 /* write may still be posted */
520 pio_advance(struct goku_ep
*ep
)
522 struct goku_request
*req
;
524 if (unlikely(list_empty (&ep
->queue
)))
526 req
= list_entry(ep
->queue
.next
, struct goku_request
, queue
);
527 (ep
->is_in
? write_fifo
: read_fifo
)(ep
, req
);
531 /*-------------------------------------------------------------------------*/
533 // return: 0 = q running, 1 = q stopped, negative = errno
534 static int start_dma(struct goku_ep
*ep
, struct goku_request
*req
)
536 struct goku_udc_regs __iomem
*regs
= ep
->dev
->regs
;
538 u32 start
= req
->req
.dma
;
539 u32 end
= start
+ req
->req
.length
- 1;
541 master
= readl(®s
->dma_master
) & MST_RW_BITS
;
543 /* re-init the bits affecting IN dma; careful with zlps */
544 if (likely(ep
->is_in
)) {
545 if (unlikely(master
& MST_RD_ENA
)) {
546 DBG (ep
->dev
, "start, IN active dma %03x!!\n",
550 writel(end
, ®s
->in_dma_end
);
551 writel(start
, ®s
->in_dma_start
);
553 master
&= ~MST_R_BITS
;
554 if (unlikely(req
->req
.length
== 0))
555 master
= MST_RD_ENA
| MST_RD_EOPB
;
556 else if ((req
->req
.length
% ep
->ep
.maxpacket
) != 0
558 master
= MST_RD_ENA
| MST_EOPB_ENA
;
560 master
= MST_RD_ENA
| MST_EOPB_DIS
;
562 ep
->dev
->int_enable
|= INT_MSTRDEND
;
564 /* Goku DMA-OUT merges short packets, which plays poorly with
565 * protocols where short packets mark the transfer boundaries.
566 * The chip supports a nonstandard policy with INT_MSTWRTMOUT,
567 * ending transfers after 3 SOFs; we don't turn it on.
570 if (unlikely(master
& MST_WR_ENA
)) {
571 DBG (ep
->dev
, "start, OUT active dma %03x!!\n",
575 writel(end
, ®s
->out_dma_end
);
576 writel(start
, ®s
->out_dma_start
);
578 master
&= ~MST_W_BITS
;
579 master
|= MST_WR_ENA
| MST_TIMEOUT_DIS
;
581 ep
->dev
->int_enable
|= INT_MSTWREND
|INT_MSTWRTMOUT
;
584 writel(master
, ®s
->dma_master
);
585 writel(ep
->dev
->int_enable
, ®s
->int_enable
);
589 static void dma_advance(struct goku_udc
*dev
, struct goku_ep
*ep
)
591 struct goku_request
*req
;
592 struct goku_udc_regs __iomem
*regs
= ep
->dev
->regs
;
595 master
= readl(®s
->dma_master
);
597 if (unlikely(list_empty(&ep
->queue
))) {
600 dev
->int_enable
&= ~INT_MSTRDEND
;
602 dev
->int_enable
&= ~(INT_MSTWREND
|INT_MSTWRTMOUT
);
603 writel(dev
->int_enable
, ®s
->int_enable
);
606 req
= list_entry(ep
->queue
.next
, struct goku_request
, queue
);
608 /* normal hw dma completion (not abort) */
609 if (likely(ep
->is_in
)) {
610 if (unlikely(master
& MST_RD_ENA
))
612 req
->req
.actual
= readl(®s
->in_dma_current
);
614 if (unlikely(master
& MST_WR_ENA
))
617 /* hardware merges short packets, and also hides packet
618 * overruns. a partial packet MAY be in the fifo here.
620 req
->req
.actual
= readl(®s
->out_dma_current
);
622 req
->req
.actual
-= req
->req
.dma
;
626 VDBG(dev
, "done %s %s dma, %u/%u bytes, req %p\n",
627 ep
->ep
.name
, ep
->is_in
? "IN" : "OUT",
628 req
->req
.actual
, req
->req
.length
, req
);
631 if (list_empty(&ep
->queue
))
633 req
= list_entry(ep
->queue
.next
, struct goku_request
, queue
);
634 (void) start_dma(ep
, req
);
637 static void abort_dma(struct goku_ep
*ep
, int status
)
639 struct goku_udc_regs __iomem
*regs
= ep
->dev
->regs
;
640 struct goku_request
*req
;
643 /* NAK future host requests, hoping the implicit delay lets the
644 * dma engine finish reading (or writing) its latest packet and
645 * empty the dma buffer (up to 16 bytes).
647 * This avoids needing to clean up a partial packet in the fifo;
648 * we can't do that for IN without side effects to HALT and TOGGLE.
650 command(regs
, COMMAND_FIFO_DISABLE
, ep
->num
);
651 req
= list_entry(ep
->queue
.next
, struct goku_request
, queue
);
652 master
= readl(®s
->dma_master
) & MST_RW_BITS
;
654 /* FIXME using these resets isn't usably documented. this may
655 * not work unless it's followed by disabling the endpoint.
657 * FIXME the OUT reset path doesn't even behave consistently.
660 if (unlikely((readl(®s
->dma_master
) & MST_RD_ENA
) == 0))
662 curr
= readl(®s
->in_dma_current
);
664 writel(curr
, ®s
->in_dma_end
);
665 writel(curr
, ®s
->in_dma_start
);
667 master
&= ~MST_R_BITS
;
668 master
|= MST_RD_RESET
;
669 writel(master
, ®s
->dma_master
);
671 if (readl(®s
->dma_master
) & MST_RD_ENA
)
672 DBG(ep
->dev
, "IN dma active after reset!\n");
675 if (unlikely((readl(®s
->dma_master
) & MST_WR_ENA
) == 0))
677 curr
= readl(®s
->out_dma_current
);
679 writel(curr
, ®s
->out_dma_end
);
680 writel(curr
, ®s
->out_dma_start
);
682 master
&= ~MST_W_BITS
;
683 master
|= MST_WR_RESET
;
684 writel(master
, ®s
->dma_master
);
686 if (readl(®s
->dma_master
) & MST_WR_ENA
)
687 DBG(ep
->dev
, "OUT dma active after reset!\n");
689 req
->req
.actual
= (curr
- req
->req
.dma
) + 1;
690 req
->req
.status
= status
;
692 VDBG(ep
->dev
, "%s %s %s %d/%d\n", __func__
, ep
->ep
.name
,
693 ep
->is_in
? "IN" : "OUT",
694 req
->req
.actual
, req
->req
.length
);
696 command(regs
, COMMAND_FIFO_ENABLE
, ep
->num
);
701 /* dma already completed; no abort needed */
702 command(regs
, COMMAND_FIFO_ENABLE
, ep
->num
);
703 req
->req
.actual
= req
->req
.length
;
707 /*-------------------------------------------------------------------------*/
710 goku_queue(struct usb_ep
*_ep
, struct usb_request
*_req
, gfp_t gfp_flags
)
712 struct goku_request
*req
;
714 struct goku_udc
*dev
;
718 /* always require a cpu-view buffer so pio works */
719 req
= container_of(_req
, struct goku_request
, req
);
720 if (unlikely(!_req
|| !_req
->complete
721 || !_req
->buf
|| !list_empty(&req
->queue
)))
723 ep
= container_of(_ep
, struct goku_ep
, ep
);
724 if (unlikely(!_ep
|| (!ep
->ep
.desc
&& ep
->num
!= 0)))
727 if (unlikely(!dev
->driver
|| dev
->gadget
.speed
== USB_SPEED_UNKNOWN
))
730 /* can't touch registers when suspended */
731 if (dev
->ep0state
== EP0_SUSPEND
)
734 /* set up dma mapping in case the caller didn't */
736 status
= usb_gadget_map_request(&dev
->gadget
, &req
->req
,
743 VDBG(dev
, "%s queue req %p, len %u buf %p\n",
744 _ep
->name
, _req
, _req
->length
, _req
->buf
);
747 spin_lock_irqsave(&dev
->lock
, flags
);
749 _req
->status
= -EINPROGRESS
;
752 /* for ep0 IN without premature status, zlp is required and
753 * writing EOP starts the status stage (OUT).
755 if (unlikely(ep
->num
== 0 && ep
->is_in
))
758 /* kickstart this i/o queue? */
760 if (list_empty(&ep
->queue
) && likely(!ep
->stopped
)) {
761 /* dma: done after dma completion IRQ (or error)
762 * pio: done after last fifo operation
765 status
= start_dma(ep
, req
);
767 status
= (ep
->is_in
? write_fifo
: read_fifo
)(ep
, req
);
769 if (unlikely(status
!= 0)) {
775 } /* else pio or dma irq handler advances the queue. */
777 if (likely(req
!= 0))
778 list_add_tail(&req
->queue
, &ep
->queue
);
780 if (likely(!list_empty(&ep
->queue
))
781 && likely(ep
->num
!= 0)
783 && !(dev
->int_enable
& INT_EPxDATASET (ep
->num
)))
784 pio_irq_enable(dev
, dev
->regs
, ep
->num
);
786 spin_unlock_irqrestore(&dev
->lock
, flags
);
788 /* pci writes may still be posted */
792 /* dequeue ALL requests */
793 static void nuke(struct goku_ep
*ep
, int status
)
795 struct goku_request
*req
;
798 if (list_empty(&ep
->queue
))
801 abort_dma(ep
, status
);
802 while (!list_empty(&ep
->queue
)) {
803 req
= list_entry(ep
->queue
.next
, struct goku_request
, queue
);
804 done(ep
, req
, status
);
808 /* dequeue JUST ONE request */
809 static int goku_dequeue(struct usb_ep
*_ep
, struct usb_request
*_req
)
811 struct goku_request
*req
;
813 struct goku_udc
*dev
;
816 ep
= container_of(_ep
, struct goku_ep
, ep
);
817 if (!_ep
|| !_req
|| (!ep
->ep
.desc
&& ep
->num
!= 0))
823 /* we can't touch (dma) registers when suspended */
824 if (dev
->ep0state
== EP0_SUSPEND
)
827 VDBG(dev
, "%s %s %s %s %p\n", __func__
, _ep
->name
,
828 ep
->is_in
? "IN" : "OUT",
829 ep
->dma
? "dma" : "pio",
832 spin_lock_irqsave(&dev
->lock
, flags
);
834 /* make sure it's actually queued on this endpoint */
835 list_for_each_entry (req
, &ep
->queue
, queue
) {
836 if (&req
->req
== _req
)
839 if (&req
->req
!= _req
) {
840 spin_unlock_irqrestore (&dev
->lock
, flags
);
844 if (ep
->dma
&& ep
->queue
.next
== &req
->queue
&& !ep
->stopped
) {
845 abort_dma(ep
, -ECONNRESET
);
846 done(ep
, req
, -ECONNRESET
);
847 dma_advance(dev
, ep
);
848 } else if (!list_empty(&req
->queue
))
849 done(ep
, req
, -ECONNRESET
);
852 spin_unlock_irqrestore(&dev
->lock
, flags
);
854 return req
? 0 : -EOPNOTSUPP
;
857 /*-------------------------------------------------------------------------*/
859 static void goku_clear_halt(struct goku_ep
*ep
)
861 // assert (ep->num !=0)
862 VDBG(ep
->dev
, "%s clear halt\n", ep
->ep
.name
);
863 command(ep
->dev
->regs
, COMMAND_SETDATA0
, ep
->num
);
864 command(ep
->dev
->regs
, COMMAND_STALL_CLEAR
, ep
->num
);
868 struct goku_request
*req
;
870 if (list_empty(&ep
->queue
))
872 req
= list_entry(ep
->queue
.next
, struct goku_request
,
874 (void) start_dma(ep
, req
);
880 static int goku_set_halt(struct usb_ep
*_ep
, int value
)
888 ep
= container_of (_ep
, struct goku_ep
, ep
);
892 ep
->dev
->ep0state
= EP0_STALL
;
893 ep
->dev
->ep
[0].stopped
= 1;
897 /* don't change EPxSTATUS_EP_INVALID to READY */
898 } else if (!ep
->ep
.desc
) {
899 DBG(ep
->dev
, "%s %s inactive?\n", __func__
, ep
->ep
.name
);
903 spin_lock_irqsave(&ep
->dev
->lock
, flags
);
904 if (!list_empty(&ep
->queue
))
906 else if (ep
->is_in
&& value
907 /* data in (either) packet buffer? */
908 && (readl(&ep
->dev
->regs
->DataSet
)
909 & DATASET_AB(ep
->num
)))
915 VDBG(ep
->dev
, "%s set halt\n", ep
->ep
.name
);
916 command(ep
->dev
->regs
, COMMAND_STALL
, ep
->num
);
917 readl(ep
->reg_status
);
919 spin_unlock_irqrestore(&ep
->dev
->lock
, flags
);
923 static int goku_fifo_status(struct usb_ep
*_ep
)
926 struct goku_udc_regs __iomem
*regs
;
931 ep
= container_of(_ep
, struct goku_ep
, ep
);
933 /* size is only reported sanely for OUT */
937 /* ignores 16-byte dma buffer; SizeH == 0 */
938 regs
= ep
->dev
->regs
;
939 size
= readl(®s
->EPxSizeLA
[ep
->num
]) & DATASIZE
;
940 size
+= readl(®s
->EPxSizeLB
[ep
->num
]) & DATASIZE
;
941 VDBG(ep
->dev
, "%s %s %u\n", __func__
, ep
->ep
.name
, size
);
945 static void goku_fifo_flush(struct usb_ep
*_ep
)
948 struct goku_udc_regs __iomem
*regs
;
953 ep
= container_of(_ep
, struct goku_ep
, ep
);
954 VDBG(ep
->dev
, "%s %s\n", __func__
, ep
->ep
.name
);
956 /* don't change EPxSTATUS_EP_INVALID to READY */
957 if (!ep
->ep
.desc
&& ep
->num
!= 0) {
958 DBG(ep
->dev
, "%s %s inactive?\n", __func__
, ep
->ep
.name
);
962 regs
= ep
->dev
->regs
;
963 size
= readl(®s
->EPxSizeLA
[ep
->num
]);
966 /* Non-desirable behavior: FIFO_CLEAR also clears the
967 * endpoint halt feature. For OUT, we _could_ just read
968 * the bytes out (PIO, if !ep->dma); for in, no choice.
971 command(regs
, COMMAND_FIFO_CLEAR
, ep
->num
);
974 static struct usb_ep_ops goku_ep_ops
= {
975 .enable
= goku_ep_enable
,
976 .disable
= goku_ep_disable
,
978 .alloc_request
= goku_alloc_request
,
979 .free_request
= goku_free_request
,
982 .dequeue
= goku_dequeue
,
984 .set_halt
= goku_set_halt
,
985 .fifo_status
= goku_fifo_status
,
986 .fifo_flush
= goku_fifo_flush
,
989 /*-------------------------------------------------------------------------*/
991 static int goku_get_frame(struct usb_gadget
*_gadget
)
996 static int goku_udc_start(struct usb_gadget
*g
,
997 struct usb_gadget_driver
*driver
);
998 static int goku_udc_stop(struct usb_gadget
*g
,
999 struct usb_gadget_driver
*driver
);
1001 static const struct usb_gadget_ops goku_ops
= {
1002 .get_frame
= goku_get_frame
,
1003 .udc_start
= goku_udc_start
,
1004 .udc_stop
= goku_udc_stop
,
1009 /*-------------------------------------------------------------------------*/
1011 static inline char *dmastr(void)
1014 return "(dma disabled)";
1015 else if (use_dma
== 2)
1016 return "(dma IN and OUT)";
1021 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1023 static const char proc_node_name
[] = "driver/udc";
1025 #define FOURBITS "%s%s%s%s"
1026 #define EIGHTBITS FOURBITS FOURBITS
1029 dump_intmask(const char *label
, u32 mask
, char **next
, unsigned *size
)
1033 /* int_status is the same format ... */
1034 t
= scnprintf(*next
, *size
,
1035 "%s %05X =" FOURBITS EIGHTBITS EIGHTBITS
"\n",
1037 (mask
& INT_PWRDETECT
) ? " power" : "",
1038 (mask
& INT_SYSERROR
) ? " sys" : "",
1039 (mask
& INT_MSTRDEND
) ? " in-dma" : "",
1040 (mask
& INT_MSTWRTMOUT
) ? " wrtmo" : "",
1042 (mask
& INT_MSTWREND
) ? " out-dma" : "",
1043 (mask
& INT_MSTWRSET
) ? " wrset" : "",
1044 (mask
& INT_ERR
) ? " err" : "",
1045 (mask
& INT_SOF
) ? " sof" : "",
1047 (mask
& INT_EP3NAK
) ? " ep3nak" : "",
1048 (mask
& INT_EP2NAK
) ? " ep2nak" : "",
1049 (mask
& INT_EP1NAK
) ? " ep1nak" : "",
1050 (mask
& INT_EP3DATASET
) ? " ep3" : "",
1052 (mask
& INT_EP2DATASET
) ? " ep2" : "",
1053 (mask
& INT_EP1DATASET
) ? " ep1" : "",
1054 (mask
& INT_STATUSNAK
) ? " ep0snak" : "",
1055 (mask
& INT_STATUS
) ? " ep0status" : "",
1057 (mask
& INT_SETUP
) ? " setup" : "",
1058 (mask
& INT_ENDPOINT0
) ? " ep0" : "",
1059 (mask
& INT_USBRESET
) ? " reset" : "",
1060 (mask
& INT_SUSPEND
) ? " suspend" : "");
1067 udc_proc_read(char *buffer
, char **start
, off_t off
, int count
,
1068 int *eof
, void *_dev
)
1071 struct goku_udc
*dev
= _dev
;
1072 struct goku_udc_regs __iomem
*regs
= dev
->regs
;
1074 unsigned size
= count
;
1075 unsigned long flags
;
1076 int i
, t
, is_usb_connected
;
1082 local_irq_save(flags
);
1084 /* basic device status */
1085 tmp
= readl(®s
->power_detect
);
1086 is_usb_connected
= tmp
& PW_DETECT
;
1087 t
= scnprintf(next
, size
,
1089 "%s version: %s %s\n"
1090 "Gadget driver: %s\n"
1093 pci_name(dev
->pdev
), driver_desc
,
1094 driver_name
, DRIVER_VERSION
, dmastr(),
1095 dev
->driver
? dev
->driver
->driver
.name
: "(none)",
1097 ? ((tmp
& PW_PULLUP
) ? "full speed" : "powered")
1100 switch(dev
->ep0state
){
1101 case EP0_DISCONNECT
: state
= "ep0_disconnect"; break;
1102 case EP0_IDLE
: state
= "ep0_idle"; break;
1103 case EP0_IN
: state
= "ep0_in"; break;
1104 case EP0_OUT
: state
= "ep0_out"; break;
1105 case EP0_STATUS
: state
= "ep0_status"; break;
1106 case EP0_STALL
: state
= "ep0_stall"; break;
1107 case EP0_SUSPEND
: state
= "ep0_suspend"; break;
1108 default: state
= "ep0_?"; break;
1114 dump_intmask("int_status", readl(®s
->int_status
), &next
, &size
);
1115 dump_intmask("int_enable", readl(®s
->int_enable
), &next
, &size
);
1117 if (!is_usb_connected
|| !dev
->driver
|| (tmp
& PW_PULLUP
) == 0)
1120 /* registers for (active) device and ep0 */
1121 t
= scnprintf(next
, size
, "\nirqs %lu\ndataset %02x "
1122 "single.bcs %02x.%02x state %x addr %u\n",
1123 dev
->irqs
, readl(®s
->DataSet
),
1124 readl(®s
->EPxSingle
), readl(®s
->EPxBCS
),
1125 readl(®s
->UsbState
),
1126 readl(®s
->address
));
1130 tmp
= readl(®s
->dma_master
);
1131 t
= scnprintf(next
, size
,
1132 "dma %03X =" EIGHTBITS
"%s %s\n", tmp
,
1133 (tmp
& MST_EOPB_DIS
) ? " eopb-" : "",
1134 (tmp
& MST_EOPB_ENA
) ? " eopb+" : "",
1135 (tmp
& MST_TIMEOUT_DIS
) ? " tmo-" : "",
1136 (tmp
& MST_TIMEOUT_ENA
) ? " tmo+" : "",
1138 (tmp
& MST_RD_EOPB
) ? " eopb" : "",
1139 (tmp
& MST_RD_RESET
) ? " in_reset" : "",
1140 (tmp
& MST_WR_RESET
) ? " out_reset" : "",
1141 (tmp
& MST_RD_ENA
) ? " IN" : "",
1143 (tmp
& MST_WR_ENA
) ? " OUT" : "",
1144 (tmp
& MST_CONNECTION
)
1150 /* dump endpoint queues */
1151 for (i
= 0; i
< 4; i
++) {
1152 struct goku_ep
*ep
= &dev
->ep
[i
];
1153 struct goku_request
*req
;
1155 if (i
&& !ep
->ep
.desc
)
1158 tmp
= readl(ep
->reg_status
);
1159 t
= scnprintf(next
, size
,
1160 "%s %s max %u %s, irqs %lu, "
1161 "status %02x (%s) " FOURBITS
"\n",
1163 ep
->is_in
? "in" : "out",
1165 ep
->dma
? "dma" : "pio",
1168 switch (tmp
& EPxSTATUS_EP_MASK
) {
1169 case EPxSTATUS_EP_READY
:
1171 case EPxSTATUS_EP_DATAIN
:
1172 s
= "packet"; break;
1173 case EPxSTATUS_EP_FULL
:
1175 case EPxSTATUS_EP_TX_ERR
: // host will retry
1176 s
= "tx_err"; break;
1177 case EPxSTATUS_EP_RX_ERR
:
1178 s
= "rx_err"; break;
1179 case EPxSTATUS_EP_BUSY
: /* ep0 only */
1181 case EPxSTATUS_EP_STALL
:
1183 case EPxSTATUS_EP_INVALID
: // these "can't happen"
1184 s
= "invalid"; break;
1188 (tmp
& EPxSTATUS_TOGGLE
) ? "data1" : "data0",
1189 (tmp
& EPxSTATUS_SUSPEND
) ? " suspend" : "",
1190 (tmp
& EPxSTATUS_FIFO_DISABLE
) ? " disable" : "",
1191 (tmp
& EPxSTATUS_STAGE_ERROR
) ? " ep0stat" : ""
1193 if (t
<= 0 || t
> size
)
1198 if (list_empty(&ep
->queue
)) {
1199 t
= scnprintf(next
, size
, "\t(nothing queued)\n");
1200 if (t
<= 0 || t
> size
)
1206 list_for_each_entry(req
, &ep
->queue
, queue
) {
1207 if (ep
->dma
&& req
->queue
.prev
== &ep
->queue
) {
1208 if (i
== UDC_MSTRD_ENDPOINT
)
1209 tmp
= readl(®s
->in_dma_current
);
1211 tmp
= readl(®s
->out_dma_current
);
1212 tmp
-= req
->req
.dma
;
1215 tmp
= req
->req
.actual
;
1217 t
= scnprintf(next
, size
,
1218 "\treq %p len %u/%u buf %p\n",
1219 &req
->req
, tmp
, req
->req
.length
,
1221 if (t
<= 0 || t
> size
)
1229 local_irq_restore(flags
);
1231 return count
- size
;
1234 #endif /* CONFIG_USB_GADGET_DEBUG_FILES */
1236 /*-------------------------------------------------------------------------*/
1238 static void udc_reinit (struct goku_udc
*dev
)
1240 static char *names
[] = { "ep0", "ep1-bulk", "ep2-bulk", "ep3-bulk" };
1244 INIT_LIST_HEAD (&dev
->gadget
.ep_list
);
1245 dev
->gadget
.ep0
= &dev
->ep
[0].ep
;
1246 dev
->gadget
.speed
= USB_SPEED_UNKNOWN
;
1247 dev
->ep0state
= EP0_DISCONNECT
;
1250 for (i
= 0; i
< 4; i
++) {
1251 struct goku_ep
*ep
= &dev
->ep
[i
];
1254 ep
->ep
.name
= names
[i
];
1255 ep
->reg_fifo
= &dev
->regs
->ep_fifo
[i
];
1256 ep
->reg_status
= &dev
->regs
->ep_status
[i
];
1257 ep
->reg_mode
= &dev
->regs
->ep_mode
[i
];
1259 ep
->ep
.ops
= &goku_ep_ops
;
1260 list_add_tail (&ep
->ep
.ep_list
, &dev
->gadget
.ep_list
);
1262 INIT_LIST_HEAD (&ep
->queue
);
1267 dev
->ep
[0].reg_mode
= NULL
;
1268 dev
->ep
[0].ep
.maxpacket
= MAX_EP0_SIZE
;
1269 list_del_init (&dev
->ep
[0].ep
.ep_list
);
1272 static void udc_reset(struct goku_udc
*dev
)
1274 struct goku_udc_regs __iomem
*regs
= dev
->regs
;
1276 writel(0, ®s
->power_detect
);
1277 writel(0, ®s
->int_enable
);
1278 readl(®s
->int_enable
);
1279 dev
->int_enable
= 0;
1281 /* deassert reset, leave USB D+ at hi-Z (no pullup)
1282 * don't let INT_PWRDETECT sequence begin
1285 writel(PW_RESETB
, ®s
->power_detect
);
1286 readl(®s
->int_enable
);
1289 static void ep0_start(struct goku_udc
*dev
)
1291 struct goku_udc_regs __iomem
*regs
= dev
->regs
;
1294 VDBG(dev
, "%s\n", __func__
);
1298 //writel(MST_EOPB_ENA | MST_TIMEOUT_ENA, ®s->dma_master);
1300 /* hw handles set_address, set_feature, get_status; maybe more */
1301 writel( G_REQMODE_SET_INTF
| G_REQMODE_GET_INTF
1302 | G_REQMODE_SET_CONF
| G_REQMODE_GET_CONF
1303 | G_REQMODE_GET_DESC
1304 | G_REQMODE_CLEAR_FEAT
1307 for (i
= 0; i
< 4; i
++)
1308 dev
->ep
[i
].irqs
= 0;
1310 /* can't modify descriptors after writing UsbReady */
1311 for (i
= 0; i
< DESC_LEN
; i
++)
1312 writel(0, ®s
->descriptors
[i
]);
1313 writel(0, ®s
->UsbReady
);
1315 /* expect ep0 requests when the host drops reset */
1316 writel(PW_RESETB
| PW_PULLUP
, ®s
->power_detect
);
1317 dev
->int_enable
= INT_DEVWIDE
| INT_EP0
;
1318 writel(dev
->int_enable
, &dev
->regs
->int_enable
);
1319 readl(®s
->int_enable
);
1320 dev
->gadget
.speed
= USB_SPEED_FULL
;
1321 dev
->ep0state
= EP0_IDLE
;
1324 static void udc_enable(struct goku_udc
*dev
)
1326 /* start enumeration now, or after power detect irq */
1327 if (readl(&dev
->regs
->power_detect
) & PW_DETECT
)
1330 DBG(dev
, "%s\n", __func__
);
1331 dev
->int_enable
= INT_PWRDETECT
;
1332 writel(dev
->int_enable
, &dev
->regs
->int_enable
);
1336 /*-------------------------------------------------------------------------*/
1338 /* keeping it simple:
1339 * - one bus driver, initted first;
1340 * - one function driver, initted second
1343 /* when a driver is successfully registered, it will receive
1344 * control requests including set_configuration(), which enables
1345 * non-control requests. then usb traffic follows until a
1346 * disconnect is reported. then a host may connect again, or
1347 * the driver might get unbound.
1349 static int goku_udc_start(struct usb_gadget
*g
,
1350 struct usb_gadget_driver
*driver
)
1352 struct goku_udc
*dev
= to_goku_udc(g
);
1354 /* hook up the driver */
1355 driver
->driver
.bus
= NULL
;
1356 dev
->driver
= driver
;
1357 dev
->gadget
.dev
.driver
= &driver
->driver
;
1360 * then enable host detection and ep0; and we're ready
1361 * for set_configuration as well as eventual disconnect.
1369 stop_activity(struct goku_udc
*dev
, struct usb_gadget_driver
*driver
)
1373 DBG (dev
, "%s\n", __func__
);
1375 if (dev
->gadget
.speed
== USB_SPEED_UNKNOWN
)
1378 /* disconnect gadget driver after quiesceing hw and the driver */
1380 for (i
= 0; i
< 4; i
++)
1381 nuke(&dev
->ep
[i
], -ESHUTDOWN
);
1387 static int goku_udc_stop(struct usb_gadget
*g
,
1388 struct usb_gadget_driver
*driver
)
1390 struct goku_udc
*dev
= to_goku_udc(g
);
1391 unsigned long flags
;
1393 spin_lock_irqsave(&dev
->lock
, flags
);
1395 stop_activity(dev
, driver
);
1396 spin_unlock_irqrestore(&dev
->lock
, flags
);
1397 dev
->gadget
.dev
.driver
= NULL
;
1402 /*-------------------------------------------------------------------------*/
1404 static void ep0_setup(struct goku_udc
*dev
)
1406 struct goku_udc_regs __iomem
*regs
= dev
->regs
;
1407 struct usb_ctrlrequest ctrl
;
1410 /* read SETUP packet and enter DATA stage */
1411 ctrl
.bRequestType
= readl(®s
->bRequestType
);
1412 ctrl
.bRequest
= readl(®s
->bRequest
);
1413 ctrl
.wValue
= cpu_to_le16((readl(®s
->wValueH
) << 8)
1414 | readl(®s
->wValueL
));
1415 ctrl
.wIndex
= cpu_to_le16((readl(®s
->wIndexH
) << 8)
1416 | readl(®s
->wIndexL
));
1417 ctrl
.wLength
= cpu_to_le16((readl(®s
->wLengthH
) << 8)
1418 | readl(®s
->wLengthL
));
1419 writel(0, ®s
->SetupRecv
);
1421 nuke(&dev
->ep
[0], 0);
1422 dev
->ep
[0].stopped
= 0;
1423 if (likely(ctrl
.bRequestType
& USB_DIR_IN
)) {
1424 dev
->ep
[0].is_in
= 1;
1425 dev
->ep0state
= EP0_IN
;
1426 /* detect early status stages */
1427 writel(ICONTROL_STATUSNAK
, &dev
->regs
->IntControl
);
1429 dev
->ep
[0].is_in
= 0;
1430 dev
->ep0state
= EP0_OUT
;
1432 /* NOTE: CLEAR_FEATURE is done in software so that we can
1433 * synchronize transfer restarts after bulk IN stalls. data
1434 * won't even enter the fifo until the halt is cleared.
1436 switch (ctrl
.bRequest
) {
1437 case USB_REQ_CLEAR_FEATURE
:
1438 switch (ctrl
.bRequestType
) {
1439 case USB_RECIP_ENDPOINT
:
1440 tmp
= le16_to_cpu(ctrl
.wIndex
) & 0x0f;
1441 /* active endpoint */
1443 (!dev
->ep
[tmp
].ep
.desc
&& tmp
!= 0))
1445 if (ctrl
.wIndex
& cpu_to_le16(
1447 if (!dev
->ep
[tmp
].is_in
)
1450 if (dev
->ep
[tmp
].is_in
)
1453 if (ctrl
.wValue
!= cpu_to_le16(
1457 goku_clear_halt(&dev
->ep
[tmp
]);
1459 /* start ep0out status stage */
1460 writel(~(1<<0), ®s
->EOP
);
1461 dev
->ep
[0].stopped
= 1;
1462 dev
->ep0state
= EP0_STATUS
;
1464 case USB_RECIP_DEVICE
:
1465 /* device remote wakeup: always clear */
1466 if (ctrl
.wValue
!= cpu_to_le16(1))
1468 VDBG(dev
, "clear dev remote wakeup\n");
1470 case USB_RECIP_INTERFACE
:
1472 default: /* pass to gadget driver */
1482 VDBG(dev
, "SETUP %02x.%02x v%04x i%04x l%04x\n",
1483 ctrl
.bRequestType
, ctrl
.bRequest
,
1484 le16_to_cpu(ctrl
.wValue
), le16_to_cpu(ctrl
.wIndex
),
1485 le16_to_cpu(ctrl
.wLength
));
1488 /* hw wants to know when we're configured (or not) */
1489 dev
->req_config
= (ctrl
.bRequest
== USB_REQ_SET_CONFIGURATION
1490 && ctrl
.bRequestType
== USB_RECIP_DEVICE
);
1491 if (unlikely(dev
->req_config
))
1492 dev
->configured
= (ctrl
.wValue
!= cpu_to_le16(0));
1494 /* delegate everything to the gadget driver.
1495 * it may respond after this irq handler returns.
1497 spin_unlock (&dev
->lock
);
1498 tmp
= dev
->driver
->setup(&dev
->gadget
, &ctrl
);
1499 spin_lock (&dev
->lock
);
1500 if (unlikely(tmp
< 0)) {
1503 VDBG(dev
, "req %02x.%02x protocol STALL; err %d\n",
1504 ctrl
.bRequestType
, ctrl
.bRequest
, tmp
);
1506 command(regs
, COMMAND_STALL
, 0);
1507 dev
->ep
[0].stopped
= 1;
1508 dev
->ep0state
= EP0_STALL
;
1511 /* expect at least one data or status stage irq */
1514 #define ACK(irqbit) { \
1516 writel(~irqbit, ®s->int_status); \
1520 static irqreturn_t
goku_irq(int irq
, void *_dev
)
1522 struct goku_udc
*dev
= _dev
;
1523 struct goku_udc_regs __iomem
*regs
= dev
->regs
;
1525 u32 stat
, handled
= 0;
1526 unsigned i
, rescans
= 5;
1528 spin_lock(&dev
->lock
);
1531 stat
= readl(®s
->int_status
) & dev
->int_enable
;
1536 /* device-wide irqs */
1537 if (unlikely(stat
& INT_DEVWIDE
)) {
1538 if (stat
& INT_SYSERROR
) {
1539 ERROR(dev
, "system error\n");
1540 stop_activity(dev
, dev
->driver
);
1543 // FIXME have a neater way to prevent re-enumeration
1547 if (stat
& INT_PWRDETECT
) {
1548 writel(~stat
, ®s
->int_status
);
1549 if (readl(&dev
->regs
->power_detect
) & PW_DETECT
) {
1550 VDBG(dev
, "connect\n");
1553 DBG(dev
, "disconnect\n");
1554 if (dev
->gadget
.speed
== USB_SPEED_FULL
)
1555 stop_activity(dev
, dev
->driver
);
1556 dev
->ep0state
= EP0_DISCONNECT
;
1557 dev
->int_enable
= INT_DEVWIDE
;
1558 writel(dev
->int_enable
, &dev
->regs
->int_enable
);
1564 if (stat
& INT_SUSPEND
) {
1566 if (readl(®s
->ep_status
[0]) & EPxSTATUS_SUSPEND
) {
1567 switch (dev
->ep0state
) {
1568 case EP0_DISCONNECT
:
1574 DBG(dev
, "USB suspend\n");
1575 dev
->ep0state
= EP0_SUSPEND
;
1576 if (dev
->gadget
.speed
!= USB_SPEED_UNKNOWN
1578 && dev
->driver
->suspend
) {
1579 spin_unlock(&dev
->lock
);
1580 dev
->driver
->suspend(&dev
->gadget
);
1581 spin_lock(&dev
->lock
);
1584 if (dev
->ep0state
!= EP0_SUSPEND
) {
1585 DBG(dev
, "bogus USB resume %d\n",
1589 DBG(dev
, "USB resume\n");
1590 dev
->ep0state
= EP0_IDLE
;
1591 if (dev
->gadget
.speed
!= USB_SPEED_UNKNOWN
1593 && dev
->driver
->resume
) {
1594 spin_unlock(&dev
->lock
);
1595 dev
->driver
->resume(&dev
->gadget
);
1596 spin_lock(&dev
->lock
);
1601 if (stat
& INT_USBRESET
) { /* hub reset done */
1603 INFO(dev
, "USB reset done, gadget %s\n",
1604 dev
->driver
->driver
.name
);
1606 // and INT_ERR on some endpoint's crc/bitstuff/... problem
1609 /* progress ep0 setup, data, or status stages.
1610 * no transition {EP0_STATUS, EP0_STALL} --> EP0_IDLE; saves irqs
1612 if (stat
& INT_SETUP
) {
1617 if (stat
& INT_STATUSNAK
) {
1618 ACK(INT_STATUSNAK
|INT_ENDPOINT0
);
1619 if (dev
->ep0state
== EP0_IN
) {
1623 writel(~(1<<0), ®s
->EOP
);
1624 dev
->ep0state
= EP0_STATUS
;
1627 if (stat
& INT_ENDPOINT0
) {
1634 /* dma completion */
1635 if (stat
& INT_MSTRDEND
) { /* IN */
1637 ep
= &dev
->ep
[UDC_MSTRD_ENDPOINT
];
1639 dma_advance(dev
, ep
);
1641 if (stat
& INT_MSTWREND
) { /* OUT */
1643 ep
= &dev
->ep
[UDC_MSTWR_ENDPOINT
];
1645 dma_advance(dev
, ep
);
1647 if (stat
& INT_MSTWRTMOUT
) { /* OUT */
1648 ACK(INT_MSTWRTMOUT
);
1649 ep
= &dev
->ep
[UDC_MSTWR_ENDPOINT
];
1651 ERROR(dev
, "%s write timeout ?\n", ep
->ep
.name
);
1652 // reset dma? then dma_advance()
1656 for (i
= 1; i
< 4; i
++) {
1657 u32 tmp
= INT_EPxDATASET(i
);
1663 if (list_empty (&ep
->queue
))
1664 pio_irq_disable(dev
, regs
, i
);
1674 (void)readl(®s
->int_enable
);
1675 spin_unlock(&dev
->lock
);
1677 DBG(dev
, "unhandled irq status: %05x (%05x, %05x)\n", stat
,
1678 readl(®s
->int_status
), dev
->int_enable
);
1679 return IRQ_RETVAL(handled
);
1684 /*-------------------------------------------------------------------------*/
1686 static void gadget_release(struct device
*_dev
)
1688 struct goku_udc
*dev
= dev_get_drvdata(_dev
);
1693 /* tear down the binding between this driver and the pci device */
1695 static void goku_remove(struct pci_dev
*pdev
)
1697 struct goku_udc
*dev
= pci_get_drvdata(pdev
);
1699 DBG(dev
, "%s\n", __func__
);
1701 usb_del_gadget_udc(&dev
->gadget
);
1703 BUG_ON(dev
->driver
);
1705 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1706 remove_proc_entry(proc_node_name
, NULL
);
1711 free_irq(pdev
->irq
, dev
);
1714 if (dev
->got_region
)
1715 release_mem_region(pci_resource_start (pdev
, 0),
1716 pci_resource_len (pdev
, 0));
1718 pci_disable_device(pdev
);
1719 if (dev
->registered
)
1720 device_unregister(&dev
->gadget
.dev
);
1722 pci_set_drvdata(pdev
, NULL
);
1725 INFO(dev
, "unbind\n");
1728 /* wrap this driver around the specified pci device, but
1729 * don't respond over USB until a gadget driver binds to us.
1732 static int goku_probe(struct pci_dev
*pdev
, const struct pci_device_id
*id
)
1734 struct goku_udc
*dev
= NULL
;
1735 unsigned long resource
, len
;
1736 void __iomem
*base
= NULL
;
1740 printk(KERN_ERR
"Check PCI %s IRQ setup!\n", pci_name(pdev
));
1745 /* alloc, and start init */
1746 dev
= kzalloc (sizeof *dev
, GFP_KERNEL
);
1748 pr_debug("enomem %s\n", pci_name(pdev
));
1753 spin_lock_init(&dev
->lock
);
1755 dev
->gadget
.ops
= &goku_ops
;
1756 dev
->gadget
.max_speed
= USB_SPEED_FULL
;
1758 /* the "gadget" abstracts/virtualizes the controller */
1759 dev_set_name(&dev
->gadget
.dev
, "gadget");
1760 dev
->gadget
.dev
.parent
= &pdev
->dev
;
1761 dev
->gadget
.dev
.dma_mask
= pdev
->dev
.dma_mask
;
1762 dev
->gadget
.dev
.release
= gadget_release
;
1763 dev
->gadget
.name
= driver_name
;
1765 /* now all the pci goodies ... */
1766 retval
= pci_enable_device(pdev
);
1768 DBG(dev
, "can't enable, %d\n", retval
);
1773 resource
= pci_resource_start(pdev
, 0);
1774 len
= pci_resource_len(pdev
, 0);
1775 if (!request_mem_region(resource
, len
, driver_name
)) {
1776 DBG(dev
, "controller already in use\n");
1780 dev
->got_region
= 1;
1782 base
= ioremap_nocache(resource
, len
);
1784 DBG(dev
, "can't map memory\n");
1788 dev
->regs
= (struct goku_udc_regs __iomem
*) base
;
1790 pci_set_drvdata(pdev
, dev
);
1791 INFO(dev
, "%s\n", driver_desc
);
1792 INFO(dev
, "version: " DRIVER_VERSION
" %s\n", dmastr());
1793 INFO(dev
, "irq %d, pci mem %p\n", pdev
->irq
, base
);
1795 /* init to known state, then setup irqs */
1798 if (request_irq(pdev
->irq
, goku_irq
, IRQF_SHARED
,
1799 driver_name
, dev
) != 0) {
1800 DBG(dev
, "request interrupt %d failed\n", pdev
->irq
);
1806 pci_set_master(pdev
);
1809 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1810 create_proc_read_entry(proc_node_name
, 0, NULL
, udc_proc_read
, dev
);
1813 retval
= device_register(&dev
->gadget
.dev
);
1815 put_device(&dev
->gadget
.dev
);
1818 dev
->registered
= 1;
1819 retval
= usb_add_gadget_udc(&pdev
->dev
, &dev
->gadget
);
1832 /*-------------------------------------------------------------------------*/
1834 static const struct pci_device_id pci_ids
[] = { {
1835 .class = ((PCI_CLASS_SERIAL_USB
<< 8) | 0xfe),
1837 .vendor
= 0x102f, /* Toshiba */
1838 .device
= 0x0107, /* this UDC */
1839 .subvendor
= PCI_ANY_ID
,
1840 .subdevice
= PCI_ANY_ID
,
1842 }, { /* end: all zeroes */ }
1844 MODULE_DEVICE_TABLE (pci
, pci_ids
);
1846 static struct pci_driver goku_pci_driver
= {
1847 .name
= (char *) driver_name
,
1848 .id_table
= pci_ids
,
1850 .probe
= goku_probe
,
1851 .remove
= goku_remove
,
1853 /* FIXME add power management support */
1856 module_pci_driver(goku_pci_driver
);