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).
24 // #define VERBOSE /* extra debug messages (success too) */
25 // #define USB_TRACE /* packet-level success messages */
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/pci.h>
30 #include <linux/delay.h>
31 #include <linux/ioport.h>
32 #include <linux/slab.h>
33 #include <linux/smp_lock.h>
34 #include <linux/errno.h>
35 #include <linux/init.h>
36 #include <linux/timer.h>
37 #include <linux/list.h>
38 #include <linux/interrupt.h>
39 #include <linux/proc_fs.h>
40 #include <linux/device.h>
41 #include <linux/usb/ch9.h>
42 #include <linux/usb_gadget.h>
44 #include <asm/byteorder.h>
47 #include <asm/system.h>
48 #include <asm/unaligned.h>
53 #define DRIVER_DESC "TC86C001 USB Device Controller"
54 #define DRIVER_VERSION "30-Oct 2003"
56 #define DMA_ADDR_INVALID (~(dma_addr_t)0)
58 static const char driver_name
[] = "goku_udc";
59 static const char driver_desc
[] = DRIVER_DESC
;
61 MODULE_AUTHOR("source@mvista.com");
62 MODULE_DESCRIPTION(DRIVER_DESC
);
63 MODULE_LICENSE("GPL");
67 * IN dma behaves ok under testing, though the IN-dma abort paths don't
68 * seem to behave quite as expected. Used by default.
70 * OUT dma documents design problems handling the common "short packet"
71 * transfer termination policy; it couldn't be enabled by default, even
72 * if the OUT-dma abort problems had a resolution.
74 static unsigned use_dma
= 1;
77 //#include <linux/moduleparam.h>
78 /* "modprobe goku_udc use_dma=1" etc
80 * 1 to use IN dma only (normal operation)
81 * 2 to use IN and OUT dma
83 module_param(use_dma
, uint
, S_IRUGO
);
86 /*-------------------------------------------------------------------------*/
88 static void nuke(struct goku_ep
*, int status
);
91 command(struct goku_udc_regs __iomem
*regs
, int command
, unsigned epnum
)
93 writel(COMMAND_EP(epnum
) | command
, ®s
->Command
);
98 goku_ep_enable(struct usb_ep
*_ep
, const struct usb_endpoint_descriptor
*desc
)
100 struct goku_udc
*dev
;
106 ep
= container_of(_ep
, struct goku_ep
, ep
);
107 if (!_ep
|| !desc
|| ep
->desc
108 || desc
->bDescriptorType
!= USB_DT_ENDPOINT
)
111 if (ep
== &dev
->ep
[0])
113 if (!dev
->driver
|| dev
->gadget
.speed
== USB_SPEED_UNKNOWN
)
115 if (ep
->num
!= (desc
->bEndpointAddress
& 0x0f))
118 switch (desc
->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
) {
119 case USB_ENDPOINT_XFER_BULK
:
120 case USB_ENDPOINT_XFER_INT
:
126 if ((readl(ep
->reg_status
) & EPxSTATUS_EP_MASK
)
127 != EPxSTATUS_EP_INVALID
)
130 /* enabling the no-toggle interrupt mode would need an api hook */
132 max
= le16_to_cpu(get_unaligned(&desc
->wMaxPacketSize
));
142 mode
|= 2 << 1; /* bulk, or intr-with-toggle */
144 /* ep1/ep2 dma direction is chosen early; it works in the other
145 * direction, with pio. be cautious with out-dma.
147 ep
->is_in
= (USB_DIR_IN
& desc
->bEndpointAddress
) != 0;
150 ep
->dma
= (use_dma
!= 0) && (ep
->num
== UDC_MSTRD_ENDPOINT
);
152 ep
->dma
= (use_dma
== 2) && (ep
->num
== UDC_MSTWR_ENDPOINT
);
154 DBG(dev
, "%s out-dma hides short packets\n",
158 spin_lock_irqsave(&ep
->dev
->lock
, flags
);
160 /* ep1 and ep2 can do double buffering and/or dma */
162 struct goku_udc_regs __iomem
*regs
= ep
->dev
->regs
;
165 /* double buffer except (for now) with pio in */
166 tmp
= ((ep
->dma
|| !ep
->is_in
)
167 ? 0x10 /* double buffered */
168 : 0x11 /* single buffer */
170 tmp
|= readl(®s
->EPxSingle
);
171 writel(tmp
, ®s
->EPxSingle
);
173 tmp
= (ep
->dma
? 0x10/*dma*/ : 0x11/*pio*/) << ep
->num
;
174 tmp
|= readl(®s
->EPxBCS
);
175 writel(tmp
, ®s
->EPxBCS
);
177 writel(mode
, ep
->reg_mode
);
178 command(ep
->dev
->regs
, COMMAND_RESET
, ep
->num
);
179 ep
->ep
.maxpacket
= max
;
182 spin_unlock_irqrestore(&ep
->dev
->lock
, flags
);
184 DBG(dev
, "enable %s %s %s maxpacket %u\n", ep
->ep
.name
,
185 ep
->is_in
? "IN" : "OUT",
186 ep
->dma
? "dma" : "pio",
192 static void ep_reset(struct goku_udc_regs __iomem
*regs
, struct goku_ep
*ep
)
194 struct goku_udc
*dev
= ep
->dev
;
197 command(regs
, COMMAND_INVALID
, ep
->num
);
199 if (ep
->num
== UDC_MSTWR_ENDPOINT
)
200 dev
->int_enable
&= ~(INT_MSTWREND
202 else if (ep
->num
== UDC_MSTRD_ENDPOINT
)
203 dev
->int_enable
&= ~INT_MSTRDEND
;
204 dev
->int_enable
&= ~INT_EPxDATASET (ep
->num
);
206 dev
->int_enable
&= ~INT_EP0
;
207 writel(dev
->int_enable
, ®s
->int_enable
);
208 readl(®s
->int_enable
);
210 struct goku_udc_regs __iomem
*r
= ep
->dev
->regs
;
213 tmp
= readl(&r
->EPxSingle
);
214 tmp
&= ~(0x11 << ep
->num
);
215 writel(tmp
, &r
->EPxSingle
);
217 tmp
= readl(&r
->EPxBCS
);
218 tmp
&= ~(0x11 << ep
->num
);
219 writel(tmp
, &r
->EPxBCS
);
221 /* reset dma in case we're still using it */
225 master
= readl(®s
->dma_master
) & MST_RW_BITS
;
226 if (ep
->num
== UDC_MSTWR_ENDPOINT
) {
227 master
&= ~MST_W_BITS
;
228 master
|= MST_WR_RESET
;
230 master
&= ~MST_R_BITS
;
231 master
|= MST_RD_RESET
;
233 writel(master
, ®s
->dma_master
);
237 ep
->ep
.maxpacket
= MAX_FIFO_SIZE
;
244 static int goku_ep_disable(struct usb_ep
*_ep
)
247 struct goku_udc
*dev
;
250 ep
= container_of(_ep
, struct goku_ep
, ep
);
251 if (!_ep
|| !ep
->desc
)
254 if (dev
->ep0state
== EP0_SUSPEND
)
257 VDBG(dev
, "disable %s\n", _ep
->name
);
259 spin_lock_irqsave(&dev
->lock
, flags
);
260 nuke(ep
, -ESHUTDOWN
);
261 ep_reset(dev
->regs
, ep
);
262 spin_unlock_irqrestore(&dev
->lock
, flags
);
267 /*-------------------------------------------------------------------------*/
269 static struct usb_request
*
270 goku_alloc_request(struct usb_ep
*_ep
, gfp_t gfp_flags
)
272 struct goku_request
*req
;
276 req
= kzalloc(sizeof *req
, gfp_flags
);
280 req
->req
.dma
= DMA_ADDR_INVALID
;
281 INIT_LIST_HEAD(&req
->queue
);
286 goku_free_request(struct usb_ep
*_ep
, struct usb_request
*_req
)
288 struct goku_request
*req
;
293 req
= container_of(_req
, struct goku_request
, req
);
294 WARN_ON(!list_empty(&req
->queue
));
298 /*-------------------------------------------------------------------------*/
302 /* many common platforms have dma-coherent caches, which means that it's
303 * safe to use kmalloc() memory for all i/o buffers without using any
304 * cache flushing calls. (unless you're trying to share cache lines
305 * between dma and non-dma activities, which is a slow idea in any case.)
307 * other platforms need more care, with 2.6 having a moderately general
308 * solution except for the common "buffer is smaller than a page" case.
310 #if defined(CONFIG_X86)
313 #elif defined(CONFIG_MIPS) && !defined(CONFIG_DMA_NONCOHERENT)
316 #elif defined(CONFIG_PPC) && !defined(CONFIG_NOT_COHERENT_CACHE)
321 /* allocating buffers this way eliminates dma mapping overhead, which
322 * on some platforms will mean eliminating a per-io buffer copy. with
323 * some kinds of system caches, further tweaks may still be needed.
326 goku_alloc_buffer(struct usb_ep
*_ep
, unsigned bytes
,
327 dma_addr_t
*dma
, gfp_t gfp_flags
)
332 ep
= container_of(_ep
, struct goku_ep
, ep
);
335 *dma
= DMA_ADDR_INVALID
;
337 #if defined(USE_KMALLOC)
338 retval
= kmalloc(bytes
, gfp_flags
);
340 *dma
= virt_to_phys(retval
);
343 /* the main problem with this call is that it wastes memory
344 * on typical 1/N page allocations: it allocates 1-N pages.
346 #warning Using dma_alloc_coherent even with buffers smaller than a page.
347 retval
= dma_alloc_coherent(&ep
->dev
->pdev
->dev
,
348 bytes
, dma
, gfp_flags
);
350 retval
= kmalloc(bytes
, gfp_flags
);
356 goku_free_buffer(struct usb_ep
*_ep
, void *buf
, dma_addr_t dma
, unsigned bytes
)
358 /* free memory into the right allocator */
360 if (dma
!= DMA_ADDR_INVALID
) {
363 ep
= container_of(_ep
, struct goku_ep
, ep
);
366 dma_free_coherent(&ep
->dev
->pdev
->dev
, bytes
, buf
, dma
);
372 /*-------------------------------------------------------------------------*/
375 done(struct goku_ep
*ep
, struct goku_request
*req
, int status
)
377 struct goku_udc
*dev
;
378 unsigned stopped
= ep
->stopped
;
380 list_del_init(&req
->queue
);
382 if (likely(req
->req
.status
== -EINPROGRESS
))
383 req
->req
.status
= status
;
385 status
= req
->req
.status
;
389 pci_unmap_single(dev
->pdev
, req
->req
.dma
, req
->req
.length
,
390 ep
->is_in
? PCI_DMA_TODEVICE
: PCI_DMA_FROMDEVICE
);
391 req
->req
.dma
= DMA_ADDR_INVALID
;
396 if (status
&& status
!= -ESHUTDOWN
)
398 VDBG(dev
, "complete %s req %p stat %d len %u/%u\n",
399 ep
->ep
.name
, &req
->req
, status
,
400 req
->req
.actual
, req
->req
.length
);
402 /* don't modify queue heads during completion callback */
404 spin_unlock(&dev
->lock
);
405 req
->req
.complete(&ep
->ep
, &req
->req
);
406 spin_lock(&dev
->lock
);
407 ep
->stopped
= stopped
;
410 /*-------------------------------------------------------------------------*/
413 write_packet(u32 __iomem
*fifo
, u8
*buf
, struct goku_request
*req
, unsigned max
)
415 unsigned length
, count
;
417 length
= min(req
->req
.length
- req
->req
.actual
, max
);
418 req
->req
.actual
+= length
;
421 while (likely(count
--))
422 writel(*buf
++, fifo
);
426 // return: 0 = still running, 1 = completed, negative = errno
427 static int write_fifo(struct goku_ep
*ep
, struct goku_request
*req
)
429 struct goku_udc
*dev
= ep
->dev
;
435 tmp
= readl(&dev
->regs
->DataSet
);
436 buf
= req
->req
.buf
+ req
->req
.actual
;
440 if (unlikely(ep
->num
== 0 && dev
->ep0state
!= EP0_IN
))
443 /* NOTE: just single-buffered PIO-IN for now. */
444 if (unlikely((tmp
& DATASET_A(ep
->num
)) != 0))
447 /* clear our "packet available" irq */
449 writel(~INT_EPxDATASET(ep
->num
), &dev
->regs
->int_status
);
451 count
= write_packet(ep
->reg_fifo
, buf
, req
, ep
->ep
.maxpacket
);
453 /* last packet often short (sometimes a zlp, especially on ep0) */
454 if (unlikely(count
!= ep
->ep
.maxpacket
)) {
455 writel(~(1<<ep
->num
), &dev
->regs
->EOP
);
457 dev
->ep
[0].stopped
= 1;
458 dev
->ep0state
= EP0_STATUS
;
462 if (likely(req
->req
.length
!= req
->req
.actual
)
468 #if 0 /* printk seemed to trash is_last...*/
470 VDBG(dev
, "wrote %s %u bytes%s IN %u left %p\n",
471 ep
->ep
.name
, count
, is_last
? "/last" : "",
472 req
->req
.length
- req
->req
.actual
, req
);
475 /* requests complete when all IN data is in the FIFO,
476 * or sometimes later, if a zlp was needed.
486 static int read_fifo(struct goku_ep
*ep
, struct goku_request
*req
)
488 struct goku_udc_regs __iomem
*regs
;
491 unsigned bufferspace
, is_short
, dbuff
;
493 regs
= ep
->dev
->regs
;
495 buf
= req
->req
.buf
+ req
->req
.actual
;
498 if (unlikely(ep
->num
== 0 && ep
->dev
->ep0state
!= EP0_OUT
))
501 dbuff
= (ep
->num
== 1 || ep
->num
== 2);
503 /* ack dataset irq matching the status we'll handle */
505 writel(~INT_EPxDATASET(ep
->num
), ®s
->int_status
);
507 set
= readl(®s
->DataSet
) & DATASET_AB(ep
->num
);
508 size
= readl(®s
->EPxSizeLA
[ep
->num
]);
509 bufferspace
= req
->req
.length
- req
->req
.actual
;
511 /* usually do nothing without an OUT packet */
512 if (likely(ep
->num
!= 0 || bufferspace
!= 0)) {
513 if (unlikely(set
== 0))
515 /* use ep1/ep2 double-buffering for OUT */
516 if (!(size
& PACKET_ACTIVE
))
517 size
= readl(®s
->EPxSizeLB
[ep
->num
]);
518 if (!(size
& PACKET_ACTIVE
)) // "can't happen"
520 size
&= DATASIZE
; /* EPxSizeH == 0 */
522 /* ep0out no-out-data case for set_config, etc */
526 /* read all bytes from this packet */
527 req
->req
.actual
+= size
;
528 is_short
= (size
< ep
->ep
.maxpacket
);
530 VDBG(ep
->dev
, "read %s %u bytes%s OUT req %p %u/%u\n",
531 ep
->ep
.name
, size
, is_short
? "/S" : "",
532 req
, req
->req
.actual
, req
->req
.length
);
534 while (likely(size
-- != 0)) {
535 u8 byte
= (u8
) readl(ep
->reg_fifo
);
537 if (unlikely(bufferspace
== 0)) {
538 /* this happens when the driver's buffer
539 * is smaller than what the host sent.
540 * discard the extra data in this packet.
542 if (req
->req
.status
!= -EOVERFLOW
)
543 DBG(ep
->dev
, "%s overflow %u\n",
545 req
->req
.status
= -EOVERFLOW
;
553 if (unlikely(is_short
|| req
->req
.actual
== req
->req
.length
)) {
554 if (unlikely(ep
->num
== 0)) {
555 /* non-control endpoints now usable? */
556 if (ep
->dev
->req_config
)
557 writel(ep
->dev
->configured
558 ? USBSTATE_CONFIGURED
561 /* ep0out status stage */
562 writel(~(1<<0), ®s
->EOP
);
564 ep
->dev
->ep0state
= EP0_STATUS
;
568 /* empty the second buffer asap */
569 if (dbuff
&& !list_empty(&ep
->queue
)) {
570 req
= list_entry(ep
->queue
.next
,
571 struct goku_request
, queue
);
581 pio_irq_enable(struct goku_udc
*dev
,
582 struct goku_udc_regs __iomem
*regs
, int epnum
)
584 dev
->int_enable
|= INT_EPxDATASET (epnum
);
585 writel(dev
->int_enable
, ®s
->int_enable
);
586 /* write may still be posted */
590 pio_irq_disable(struct goku_udc
*dev
,
591 struct goku_udc_regs __iomem
*regs
, int epnum
)
593 dev
->int_enable
&= ~INT_EPxDATASET (epnum
);
594 writel(dev
->int_enable
, ®s
->int_enable
);
595 /* write may still be posted */
599 pio_advance(struct goku_ep
*ep
)
601 struct goku_request
*req
;
603 if (unlikely(list_empty (&ep
->queue
)))
605 req
= list_entry(ep
->queue
.next
, struct goku_request
, queue
);
606 (ep
->is_in
? write_fifo
: read_fifo
)(ep
, req
);
610 /*-------------------------------------------------------------------------*/
612 // return: 0 = q running, 1 = q stopped, negative = errno
613 static int start_dma(struct goku_ep
*ep
, struct goku_request
*req
)
615 struct goku_udc_regs __iomem
*regs
= ep
->dev
->regs
;
617 u32 start
= req
->req
.dma
;
618 u32 end
= start
+ req
->req
.length
- 1;
620 master
= readl(®s
->dma_master
) & MST_RW_BITS
;
622 /* re-init the bits affecting IN dma; careful with zlps */
623 if (likely(ep
->is_in
)) {
624 if (unlikely(master
& MST_RD_ENA
)) {
625 DBG (ep
->dev
, "start, IN active dma %03x!!\n",
629 writel(end
, ®s
->in_dma_end
);
630 writel(start
, ®s
->in_dma_start
);
632 master
&= ~MST_R_BITS
;
633 if (unlikely(req
->req
.length
== 0))
634 master
= MST_RD_ENA
| MST_RD_EOPB
;
635 else if ((req
->req
.length
% ep
->ep
.maxpacket
) != 0
637 master
= MST_RD_ENA
| MST_EOPB_ENA
;
639 master
= MST_RD_ENA
| MST_EOPB_DIS
;
641 ep
->dev
->int_enable
|= INT_MSTRDEND
;
643 /* Goku DMA-OUT merges short packets, which plays poorly with
644 * protocols where short packets mark the transfer boundaries.
645 * The chip supports a nonstandard policy with INT_MSTWRTMOUT,
646 * ending transfers after 3 SOFs; we don't turn it on.
649 if (unlikely(master
& MST_WR_ENA
)) {
650 DBG (ep
->dev
, "start, OUT active dma %03x!!\n",
654 writel(end
, ®s
->out_dma_end
);
655 writel(start
, ®s
->out_dma_start
);
657 master
&= ~MST_W_BITS
;
658 master
|= MST_WR_ENA
| MST_TIMEOUT_DIS
;
660 ep
->dev
->int_enable
|= INT_MSTWREND
|INT_MSTWRTMOUT
;
663 writel(master
, ®s
->dma_master
);
664 writel(ep
->dev
->int_enable
, ®s
->int_enable
);
668 static void dma_advance(struct goku_udc
*dev
, struct goku_ep
*ep
)
670 struct goku_request
*req
;
671 struct goku_udc_regs __iomem
*regs
= ep
->dev
->regs
;
674 master
= readl(®s
->dma_master
);
676 if (unlikely(list_empty(&ep
->queue
))) {
679 dev
->int_enable
&= ~INT_MSTRDEND
;
681 dev
->int_enable
&= ~(INT_MSTWREND
|INT_MSTWRTMOUT
);
682 writel(dev
->int_enable
, ®s
->int_enable
);
685 req
= list_entry(ep
->queue
.next
, struct goku_request
, queue
);
687 /* normal hw dma completion (not abort) */
688 if (likely(ep
->is_in
)) {
689 if (unlikely(master
& MST_RD_ENA
))
691 req
->req
.actual
= readl(®s
->in_dma_current
);
693 if (unlikely(master
& MST_WR_ENA
))
696 /* hardware merges short packets, and also hides packet
697 * overruns. a partial packet MAY be in the fifo here.
699 req
->req
.actual
= readl(®s
->out_dma_current
);
701 req
->req
.actual
-= req
->req
.dma
;
705 VDBG(dev
, "done %s %s dma, %u/%u bytes, req %p\n",
706 ep
->ep
.name
, ep
->is_in
? "IN" : "OUT",
707 req
->req
.actual
, req
->req
.length
, req
);
710 if (list_empty(&ep
->queue
))
712 req
= list_entry(ep
->queue
.next
, struct goku_request
, queue
);
713 (void) start_dma(ep
, req
);
716 static void abort_dma(struct goku_ep
*ep
, int status
)
718 struct goku_udc_regs __iomem
*regs
= ep
->dev
->regs
;
719 struct goku_request
*req
;
722 /* NAK future host requests, hoping the implicit delay lets the
723 * dma engine finish reading (or writing) its latest packet and
724 * empty the dma buffer (up to 16 bytes).
726 * This avoids needing to clean up a partial packet in the fifo;
727 * we can't do that for IN without side effects to HALT and TOGGLE.
729 command(regs
, COMMAND_FIFO_DISABLE
, ep
->num
);
730 req
= list_entry(ep
->queue
.next
, struct goku_request
, queue
);
731 master
= readl(®s
->dma_master
) & MST_RW_BITS
;
733 /* FIXME using these resets isn't usably documented. this may
734 * not work unless it's followed by disabling the endpoint.
736 * FIXME the OUT reset path doesn't even behave consistently.
739 if (unlikely((readl(®s
->dma_master
) & MST_RD_ENA
) == 0))
741 curr
= readl(®s
->in_dma_current
);
743 writel(curr
, ®s
->in_dma_end
);
744 writel(curr
, ®s
->in_dma_start
);
746 master
&= ~MST_R_BITS
;
747 master
|= MST_RD_RESET
;
748 writel(master
, ®s
->dma_master
);
750 if (readl(®s
->dma_master
) & MST_RD_ENA
)
751 DBG(ep
->dev
, "IN dma active after reset!\n");
754 if (unlikely((readl(®s
->dma_master
) & MST_WR_ENA
) == 0))
756 curr
= readl(®s
->out_dma_current
);
758 writel(curr
, ®s
->out_dma_end
);
759 writel(curr
, ®s
->out_dma_start
);
761 master
&= ~MST_W_BITS
;
762 master
|= MST_WR_RESET
;
763 writel(master
, ®s
->dma_master
);
765 if (readl(®s
->dma_master
) & MST_WR_ENA
)
766 DBG(ep
->dev
, "OUT dma active after reset!\n");
768 req
->req
.actual
= (curr
- req
->req
.dma
) + 1;
769 req
->req
.status
= status
;
771 VDBG(ep
->dev
, "%s %s %s %d/%d\n", __FUNCTION__
, ep
->ep
.name
,
772 ep
->is_in
? "IN" : "OUT",
773 req
->req
.actual
, req
->req
.length
);
775 command(regs
, COMMAND_FIFO_ENABLE
, ep
->num
);
780 /* dma already completed; no abort needed */
781 command(regs
, COMMAND_FIFO_ENABLE
, ep
->num
);
782 req
->req
.actual
= req
->req
.length
;
786 /*-------------------------------------------------------------------------*/
789 goku_queue(struct usb_ep
*_ep
, struct usb_request
*_req
, gfp_t gfp_flags
)
791 struct goku_request
*req
;
793 struct goku_udc
*dev
;
797 /* always require a cpu-view buffer so pio works */
798 req
= container_of(_req
, struct goku_request
, req
);
799 if (unlikely(!_req
|| !_req
->complete
800 || !_req
->buf
|| !list_empty(&req
->queue
)))
802 ep
= container_of(_ep
, struct goku_ep
, ep
);
803 if (unlikely(!_ep
|| (!ep
->desc
&& ep
->num
!= 0)))
806 if (unlikely(!dev
->driver
|| dev
->gadget
.speed
== USB_SPEED_UNKNOWN
))
809 /* can't touch registers when suspended */
810 if (dev
->ep0state
== EP0_SUSPEND
)
813 /* set up dma mapping in case the caller didn't */
814 if (ep
->dma
&& _req
->dma
== DMA_ADDR_INVALID
) {
815 _req
->dma
= pci_map_single(dev
->pdev
, _req
->buf
, _req
->length
,
816 ep
->is_in
? PCI_DMA_TODEVICE
: PCI_DMA_FROMDEVICE
);
821 VDBG(dev
, "%s queue req %p, len %u buf %p\n",
822 _ep
->name
, _req
, _req
->length
, _req
->buf
);
825 spin_lock_irqsave(&dev
->lock
, flags
);
827 _req
->status
= -EINPROGRESS
;
830 /* for ep0 IN without premature status, zlp is required and
831 * writing EOP starts the status stage (OUT).
833 if (unlikely(ep
->num
== 0 && ep
->is_in
))
836 /* kickstart this i/o queue? */
838 if (list_empty(&ep
->queue
) && likely(!ep
->stopped
)) {
839 /* dma: done after dma completion IRQ (or error)
840 * pio: done after last fifo operation
843 status
= start_dma(ep
, req
);
845 status
= (ep
->is_in
? write_fifo
: read_fifo
)(ep
, req
);
847 if (unlikely(status
!= 0)) {
853 } /* else pio or dma irq handler advances the queue. */
855 if (likely(req
!= 0))
856 list_add_tail(&req
->queue
, &ep
->queue
);
858 if (likely(!list_empty(&ep
->queue
))
859 && likely(ep
->num
!= 0)
861 && !(dev
->int_enable
& INT_EPxDATASET (ep
->num
)))
862 pio_irq_enable(dev
, dev
->regs
, ep
->num
);
864 spin_unlock_irqrestore(&dev
->lock
, flags
);
866 /* pci writes may still be posted */
870 /* dequeue ALL requests */
871 static void nuke(struct goku_ep
*ep
, int status
)
873 struct goku_request
*req
;
876 if (list_empty(&ep
->queue
))
879 abort_dma(ep
, status
);
880 while (!list_empty(&ep
->queue
)) {
881 req
= list_entry(ep
->queue
.next
, struct goku_request
, queue
);
882 done(ep
, req
, status
);
886 /* dequeue JUST ONE request */
887 static int goku_dequeue(struct usb_ep
*_ep
, struct usb_request
*_req
)
889 struct goku_request
*req
;
891 struct goku_udc
*dev
;
894 ep
= container_of(_ep
, struct goku_ep
, ep
);
895 if (!_ep
|| !_req
|| (!ep
->desc
&& ep
->num
!= 0))
901 /* we can't touch (dma) registers when suspended */
902 if (dev
->ep0state
== EP0_SUSPEND
)
905 VDBG(dev
, "%s %s %s %s %p\n", __FUNCTION__
, _ep
->name
,
906 ep
->is_in
? "IN" : "OUT",
907 ep
->dma
? "dma" : "pio",
910 spin_lock_irqsave(&dev
->lock
, flags
);
912 /* make sure it's actually queued on this endpoint */
913 list_for_each_entry (req
, &ep
->queue
, queue
) {
914 if (&req
->req
== _req
)
917 if (&req
->req
!= _req
) {
918 spin_unlock_irqrestore (&dev
->lock
, flags
);
922 if (ep
->dma
&& ep
->queue
.next
== &req
->queue
&& !ep
->stopped
) {
923 abort_dma(ep
, -ECONNRESET
);
924 done(ep
, req
, -ECONNRESET
);
925 dma_advance(dev
, ep
);
926 } else if (!list_empty(&req
->queue
))
927 done(ep
, req
, -ECONNRESET
);
930 spin_unlock_irqrestore(&dev
->lock
, flags
);
932 return req
? 0 : -EOPNOTSUPP
;
935 /*-------------------------------------------------------------------------*/
937 static void goku_clear_halt(struct goku_ep
*ep
)
939 // assert (ep->num !=0)
940 VDBG(ep
->dev
, "%s clear halt\n", ep
->ep
.name
);
941 command(ep
->dev
->regs
, COMMAND_SETDATA0
, ep
->num
);
942 command(ep
->dev
->regs
, COMMAND_STALL_CLEAR
, ep
->num
);
946 struct goku_request
*req
;
948 if (list_empty(&ep
->queue
))
950 req
= list_entry(ep
->queue
.next
, struct goku_request
,
952 (void) start_dma(ep
, req
);
958 static int goku_set_halt(struct usb_ep
*_ep
, int value
)
966 ep
= container_of (_ep
, struct goku_ep
, ep
);
970 ep
->dev
->ep0state
= EP0_STALL
;
971 ep
->dev
->ep
[0].stopped
= 1;
975 /* don't change EPxSTATUS_EP_INVALID to READY */
976 } else if (!ep
->desc
) {
977 DBG(ep
->dev
, "%s %s inactive?\n", __FUNCTION__
, ep
->ep
.name
);
981 spin_lock_irqsave(&ep
->dev
->lock
, flags
);
982 if (!list_empty(&ep
->queue
))
984 else if (ep
->is_in
&& value
985 /* data in (either) packet buffer? */
986 && (readl(&ep
->dev
->regs
->DataSet
)
987 & DATASET_AB(ep
->num
)))
993 VDBG(ep
->dev
, "%s set halt\n", ep
->ep
.name
);
994 command(ep
->dev
->regs
, COMMAND_STALL
, ep
->num
);
995 readl(ep
->reg_status
);
997 spin_unlock_irqrestore(&ep
->dev
->lock
, flags
);
1001 static int goku_fifo_status(struct usb_ep
*_ep
)
1004 struct goku_udc_regs __iomem
*regs
;
1009 ep
= container_of(_ep
, struct goku_ep
, ep
);
1011 /* size is only reported sanely for OUT */
1015 /* ignores 16-byte dma buffer; SizeH == 0 */
1016 regs
= ep
->dev
->regs
;
1017 size
= readl(®s
->EPxSizeLA
[ep
->num
]) & DATASIZE
;
1018 size
+= readl(®s
->EPxSizeLB
[ep
->num
]) & DATASIZE
;
1019 VDBG(ep
->dev
, "%s %s %u\n", __FUNCTION__
, ep
->ep
.name
, size
);
1023 static void goku_fifo_flush(struct usb_ep
*_ep
)
1026 struct goku_udc_regs __iomem
*regs
;
1031 ep
= container_of(_ep
, struct goku_ep
, ep
);
1032 VDBG(ep
->dev
, "%s %s\n", __FUNCTION__
, ep
->ep
.name
);
1034 /* don't change EPxSTATUS_EP_INVALID to READY */
1035 if (!ep
->desc
&& ep
->num
!= 0) {
1036 DBG(ep
->dev
, "%s %s inactive?\n", __FUNCTION__
, ep
->ep
.name
);
1040 regs
= ep
->dev
->regs
;
1041 size
= readl(®s
->EPxSizeLA
[ep
->num
]);
1044 /* Non-desirable behavior: FIFO_CLEAR also clears the
1045 * endpoint halt feature. For OUT, we _could_ just read
1046 * the bytes out (PIO, if !ep->dma); for in, no choice.
1049 command(regs
, COMMAND_FIFO_CLEAR
, ep
->num
);
1052 static struct usb_ep_ops goku_ep_ops
= {
1053 .enable
= goku_ep_enable
,
1054 .disable
= goku_ep_disable
,
1056 .alloc_request
= goku_alloc_request
,
1057 .free_request
= goku_free_request
,
1059 .alloc_buffer
= goku_alloc_buffer
,
1060 .free_buffer
= goku_free_buffer
,
1062 .queue
= goku_queue
,
1063 .dequeue
= goku_dequeue
,
1065 .set_halt
= goku_set_halt
,
1066 .fifo_status
= goku_fifo_status
,
1067 .fifo_flush
= goku_fifo_flush
,
1070 /*-------------------------------------------------------------------------*/
1072 static int goku_get_frame(struct usb_gadget
*_gadget
)
1077 static const struct usb_gadget_ops goku_ops
= {
1078 .get_frame
= goku_get_frame
,
1083 /*-------------------------------------------------------------------------*/
1085 static inline char *dmastr(void)
1088 return "(dma disabled)";
1089 else if (use_dma
== 2)
1090 return "(dma IN and OUT)";
1095 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1097 static const char proc_node_name
[] = "driver/udc";
1099 #define FOURBITS "%s%s%s%s"
1100 #define EIGHTBITS FOURBITS FOURBITS
1103 dump_intmask(const char *label
, u32 mask
, char **next
, unsigned *size
)
1107 /* int_status is the same format ... */
1108 t
= scnprintf(*next
, *size
,
1109 "%s %05X =" FOURBITS EIGHTBITS EIGHTBITS
"\n",
1111 (mask
& INT_PWRDETECT
) ? " power" : "",
1112 (mask
& INT_SYSERROR
) ? " sys" : "",
1113 (mask
& INT_MSTRDEND
) ? " in-dma" : "",
1114 (mask
& INT_MSTWRTMOUT
) ? " wrtmo" : "",
1116 (mask
& INT_MSTWREND
) ? " out-dma" : "",
1117 (mask
& INT_MSTWRSET
) ? " wrset" : "",
1118 (mask
& INT_ERR
) ? " err" : "",
1119 (mask
& INT_SOF
) ? " sof" : "",
1121 (mask
& INT_EP3NAK
) ? " ep3nak" : "",
1122 (mask
& INT_EP2NAK
) ? " ep2nak" : "",
1123 (mask
& INT_EP1NAK
) ? " ep1nak" : "",
1124 (mask
& INT_EP3DATASET
) ? " ep3" : "",
1126 (mask
& INT_EP2DATASET
) ? " ep2" : "",
1127 (mask
& INT_EP1DATASET
) ? " ep1" : "",
1128 (mask
& INT_STATUSNAK
) ? " ep0snak" : "",
1129 (mask
& INT_STATUS
) ? " ep0status" : "",
1131 (mask
& INT_SETUP
) ? " setup" : "",
1132 (mask
& INT_ENDPOINT0
) ? " ep0" : "",
1133 (mask
& INT_USBRESET
) ? " reset" : "",
1134 (mask
& INT_SUSPEND
) ? " suspend" : "");
1141 udc_proc_read(char *buffer
, char **start
, off_t off
, int count
,
1142 int *eof
, void *_dev
)
1145 struct goku_udc
*dev
= _dev
;
1146 struct goku_udc_regs __iomem
*regs
= dev
->regs
;
1148 unsigned size
= count
;
1149 unsigned long flags
;
1150 int i
, t
, is_usb_connected
;
1156 local_irq_save(flags
);
1158 /* basic device status */
1159 tmp
= readl(®s
->power_detect
);
1160 is_usb_connected
= tmp
& PW_DETECT
;
1161 t
= scnprintf(next
, size
,
1163 "%s version: %s %s\n"
1164 "Gadget driver: %s\n"
1167 pci_name(dev
->pdev
), driver_desc
,
1168 driver_name
, DRIVER_VERSION
, dmastr(),
1169 dev
->driver
? dev
->driver
->driver
.name
: "(none)",
1171 ? ((tmp
& PW_PULLUP
) ? "full speed" : "powered")
1174 switch(dev
->ep0state
){
1175 case EP0_DISCONNECT
: tmp
= "ep0_disconnect"; break;
1176 case EP0_IDLE
: tmp
= "ep0_idle"; break;
1177 case EP0_IN
: tmp
= "ep0_in"; break;
1178 case EP0_OUT
: tmp
= "ep0_out"; break;
1179 case EP0_STATUS
: tmp
= "ep0_status"; break;
1180 case EP0_STALL
: tmp
= "ep0_stall"; break;
1181 case EP0_SUSPEND
: tmp
= "ep0_suspend"; break;
1182 default: tmp
= "ep0_?"; break;
1188 dump_intmask("int_status", readl(®s
->int_status
), &next
, &size
);
1189 dump_intmask("int_enable", readl(®s
->int_enable
), &next
, &size
);
1191 if (!is_usb_connected
|| !dev
->driver
|| (tmp
& PW_PULLUP
) == 0)
1194 /* registers for (active) device and ep0 */
1195 t
= scnprintf(next
, size
, "\nirqs %lu\ndataset %02x "
1196 "single.bcs %02x.%02x state %x addr %u\n",
1197 dev
->irqs
, readl(®s
->DataSet
),
1198 readl(®s
->EPxSingle
), readl(®s
->EPxBCS
),
1199 readl(®s
->UsbState
),
1200 readl(®s
->address
));
1204 tmp
= readl(®s
->dma_master
);
1205 t
= scnprintf(next
, size
,
1206 "dma %03X =" EIGHTBITS
"%s %s\n", tmp
,
1207 (tmp
& MST_EOPB_DIS
) ? " eopb-" : "",
1208 (tmp
& MST_EOPB_ENA
) ? " eopb+" : "",
1209 (tmp
& MST_TIMEOUT_DIS
) ? " tmo-" : "",
1210 (tmp
& MST_TIMEOUT_ENA
) ? " tmo+" : "",
1212 (tmp
& MST_RD_EOPB
) ? " eopb" : "",
1213 (tmp
& MST_RD_RESET
) ? " in_reset" : "",
1214 (tmp
& MST_WR_RESET
) ? " out_reset" : "",
1215 (tmp
& MST_RD_ENA
) ? " IN" : "",
1217 (tmp
& MST_WR_ENA
) ? " OUT" : "",
1218 (tmp
& MST_CONNECTION
)
1224 /* dump endpoint queues */
1225 for (i
= 0; i
< 4; i
++) {
1226 struct goku_ep
*ep
= &dev
->ep
[i
];
1227 struct goku_request
*req
;
1233 tmp
= readl(ep
->reg_status
);
1234 t
= scnprintf(next
, size
,
1235 "%s %s max %u %s, irqs %lu, "
1236 "status %02x (%s) " FOURBITS
"\n",
1238 ep
->is_in
? "in" : "out",
1240 ep
->dma
? "dma" : "pio",
1243 switch (tmp
& EPxSTATUS_EP_MASK
) {
1244 case EPxSTATUS_EP_READY
:
1246 case EPxSTATUS_EP_DATAIN
:
1247 s
= "packet"; break;
1248 case EPxSTATUS_EP_FULL
:
1250 case EPxSTATUS_EP_TX_ERR
: // host will retry
1251 s
= "tx_err"; break;
1252 case EPxSTATUS_EP_RX_ERR
:
1253 s
= "rx_err"; break;
1254 case EPxSTATUS_EP_BUSY
: /* ep0 only */
1256 case EPxSTATUS_EP_STALL
:
1258 case EPxSTATUS_EP_INVALID
: // these "can't happen"
1259 s
= "invalid"; break;
1263 (tmp
& EPxSTATUS_TOGGLE
) ? "data1" : "data0",
1264 (tmp
& EPxSTATUS_SUSPEND
) ? " suspend" : "",
1265 (tmp
& EPxSTATUS_FIFO_DISABLE
) ? " disable" : "",
1266 (tmp
& EPxSTATUS_STAGE_ERROR
) ? " ep0stat" : ""
1268 if (t
<= 0 || t
> size
)
1273 if (list_empty(&ep
->queue
)) {
1274 t
= scnprintf(next
, size
, "\t(nothing queued)\n");
1275 if (t
<= 0 || t
> size
)
1281 list_for_each_entry(req
, &ep
->queue
, queue
) {
1282 if (ep
->dma
&& req
->queue
.prev
== &ep
->queue
) {
1283 if (i
== UDC_MSTRD_ENDPOINT
)
1284 tmp
= readl(®s
->in_dma_current
);
1286 tmp
= readl(®s
->out_dma_current
);
1287 tmp
-= req
->req
.dma
;
1290 tmp
= req
->req
.actual
;
1292 t
= scnprintf(next
, size
,
1293 "\treq %p len %u/%u buf %p\n",
1294 &req
->req
, tmp
, req
->req
.length
,
1296 if (t
<= 0 || t
> size
)
1304 local_irq_restore(flags
);
1306 return count
- size
;
1309 #endif /* CONFIG_USB_GADGET_DEBUG_FILES */
1311 /*-------------------------------------------------------------------------*/
1313 static void udc_reinit (struct goku_udc
*dev
)
1315 static char *names
[] = { "ep0", "ep1-bulk", "ep2-bulk", "ep3-bulk" };
1319 INIT_LIST_HEAD (&dev
->gadget
.ep_list
);
1320 dev
->gadget
.ep0
= &dev
->ep
[0].ep
;
1321 dev
->gadget
.speed
= USB_SPEED_UNKNOWN
;
1322 dev
->ep0state
= EP0_DISCONNECT
;
1325 for (i
= 0; i
< 4; i
++) {
1326 struct goku_ep
*ep
= &dev
->ep
[i
];
1329 ep
->ep
.name
= names
[i
];
1330 ep
->reg_fifo
= &dev
->regs
->ep_fifo
[i
];
1331 ep
->reg_status
= &dev
->regs
->ep_status
[i
];
1332 ep
->reg_mode
= &dev
->regs
->ep_mode
[i
];
1334 ep
->ep
.ops
= &goku_ep_ops
;
1335 list_add_tail (&ep
->ep
.ep_list
, &dev
->gadget
.ep_list
);
1337 INIT_LIST_HEAD (&ep
->queue
);
1342 dev
->ep
[0].reg_mode
= NULL
;
1343 dev
->ep
[0].ep
.maxpacket
= MAX_EP0_SIZE
;
1344 list_del_init (&dev
->ep
[0].ep
.ep_list
);
1347 static void udc_reset(struct goku_udc
*dev
)
1349 struct goku_udc_regs __iomem
*regs
= dev
->regs
;
1351 writel(0, ®s
->power_detect
);
1352 writel(0, ®s
->int_enable
);
1353 readl(®s
->int_enable
);
1354 dev
->int_enable
= 0;
1356 /* deassert reset, leave USB D+ at hi-Z (no pullup)
1357 * don't let INT_PWRDETECT sequence begin
1360 writel(PW_RESETB
, ®s
->power_detect
);
1361 readl(®s
->int_enable
);
1364 static void ep0_start(struct goku_udc
*dev
)
1366 struct goku_udc_regs __iomem
*regs
= dev
->regs
;
1369 VDBG(dev
, "%s\n", __FUNCTION__
);
1373 //writel(MST_EOPB_ENA | MST_TIMEOUT_ENA, ®s->dma_master);
1375 /* hw handles set_address, set_feature, get_status; maybe more */
1376 writel( G_REQMODE_SET_INTF
| G_REQMODE_GET_INTF
1377 | G_REQMODE_SET_CONF
| G_REQMODE_GET_CONF
1378 | G_REQMODE_GET_DESC
1379 | G_REQMODE_CLEAR_FEAT
1382 for (i
= 0; i
< 4; i
++)
1383 dev
->ep
[i
].irqs
= 0;
1385 /* can't modify descriptors after writing UsbReady */
1386 for (i
= 0; i
< DESC_LEN
; i
++)
1387 writel(0, ®s
->descriptors
[i
]);
1388 writel(0, ®s
->UsbReady
);
1390 /* expect ep0 requests when the host drops reset */
1391 writel(PW_RESETB
| PW_PULLUP
, ®s
->power_detect
);
1392 dev
->int_enable
= INT_DEVWIDE
| INT_EP0
;
1393 writel(dev
->int_enable
, &dev
->regs
->int_enable
);
1394 readl(®s
->int_enable
);
1395 dev
->gadget
.speed
= USB_SPEED_FULL
;
1396 dev
->ep0state
= EP0_IDLE
;
1399 static void udc_enable(struct goku_udc
*dev
)
1401 /* start enumeration now, or after power detect irq */
1402 if (readl(&dev
->regs
->power_detect
) & PW_DETECT
)
1405 DBG(dev
, "%s\n", __FUNCTION__
);
1406 dev
->int_enable
= INT_PWRDETECT
;
1407 writel(dev
->int_enable
, &dev
->regs
->int_enable
);
1411 /*-------------------------------------------------------------------------*/
1413 /* keeping it simple:
1414 * - one bus driver, initted first;
1415 * - one function driver, initted second
1418 static struct goku_udc
*the_controller
;
1420 /* when a driver is successfully registered, it will receive
1421 * control requests including set_configuration(), which enables
1422 * non-control requests. then usb traffic follows until a
1423 * disconnect is reported. then a host may connect again, or
1424 * the driver might get unbound.
1426 int usb_gadget_register_driver(struct usb_gadget_driver
*driver
)
1428 struct goku_udc
*dev
= the_controller
;
1432 || driver
->speed
!= USB_SPEED_FULL
1434 || !driver
->disconnect
1442 /* hook up the driver */
1443 driver
->driver
.bus
= NULL
;
1444 dev
->driver
= driver
;
1445 dev
->gadget
.dev
.driver
= &driver
->driver
;
1446 retval
= driver
->bind(&dev
->gadget
);
1448 DBG(dev
, "bind to driver %s --> error %d\n",
1449 driver
->driver
.name
, retval
);
1451 dev
->gadget
.dev
.driver
= NULL
;
1455 /* then enable host detection and ep0; and we're ready
1456 * for set_configuration as well as eventual disconnect.
1460 DBG(dev
, "registered gadget driver '%s'\n", driver
->driver
.name
);
1463 EXPORT_SYMBOL(usb_gadget_register_driver
);
1466 stop_activity(struct goku_udc
*dev
, struct usb_gadget_driver
*driver
)
1470 DBG (dev
, "%s\n", __FUNCTION__
);
1472 if (dev
->gadget
.speed
== USB_SPEED_UNKNOWN
)
1475 /* disconnect gadget driver after quiesceing hw and the driver */
1477 for (i
= 0; i
< 4; i
++)
1478 nuke(&dev
->ep
[i
], -ESHUTDOWN
);
1480 spin_unlock(&dev
->lock
);
1481 driver
->disconnect(&dev
->gadget
);
1482 spin_lock(&dev
->lock
);
1489 int usb_gadget_unregister_driver(struct usb_gadget_driver
*driver
)
1491 struct goku_udc
*dev
= the_controller
;
1492 unsigned long flags
;
1496 if (!driver
|| driver
!= dev
->driver
|| !driver
->unbind
)
1499 spin_lock_irqsave(&dev
->lock
, flags
);
1501 stop_activity(dev
, driver
);
1502 spin_unlock_irqrestore(&dev
->lock
, flags
);
1504 driver
->unbind(&dev
->gadget
);
1506 DBG(dev
, "unregistered driver '%s'\n", driver
->driver
.name
);
1509 EXPORT_SYMBOL(usb_gadget_unregister_driver
);
1512 /*-------------------------------------------------------------------------*/
1514 static void ep0_setup(struct goku_udc
*dev
)
1516 struct goku_udc_regs __iomem
*regs
= dev
->regs
;
1517 struct usb_ctrlrequest ctrl
;
1520 /* read SETUP packet and enter DATA stage */
1521 ctrl
.bRequestType
= readl(®s
->bRequestType
);
1522 ctrl
.bRequest
= readl(®s
->bRequest
);
1523 ctrl
.wValue
= cpu_to_le16((readl(®s
->wValueH
) << 8)
1524 | readl(®s
->wValueL
));
1525 ctrl
.wIndex
= cpu_to_le16((readl(®s
->wIndexH
) << 8)
1526 | readl(®s
->wIndexL
));
1527 ctrl
.wLength
= cpu_to_le16((readl(®s
->wLengthH
) << 8)
1528 | readl(®s
->wLengthL
));
1529 writel(0, ®s
->SetupRecv
);
1531 nuke(&dev
->ep
[0], 0);
1532 dev
->ep
[0].stopped
= 0;
1533 if (likely(ctrl
.bRequestType
& USB_DIR_IN
)) {
1534 dev
->ep
[0].is_in
= 1;
1535 dev
->ep0state
= EP0_IN
;
1536 /* detect early status stages */
1537 writel(ICONTROL_STATUSNAK
, &dev
->regs
->IntControl
);
1539 dev
->ep
[0].is_in
= 0;
1540 dev
->ep0state
= EP0_OUT
;
1542 /* NOTE: CLEAR_FEATURE is done in software so that we can
1543 * synchronize transfer restarts after bulk IN stalls. data
1544 * won't even enter the fifo until the halt is cleared.
1546 switch (ctrl
.bRequest
) {
1547 case USB_REQ_CLEAR_FEATURE
:
1548 switch (ctrl
.bRequestType
) {
1549 case USB_RECIP_ENDPOINT
:
1550 tmp
= le16_to_cpu(ctrl
.wIndex
) & 0x0f;
1551 /* active endpoint */
1552 if (tmp
> 3 || (!dev
->ep
[tmp
].desc
&& tmp
!= 0))
1554 if (ctrl
.wIndex
& __constant_cpu_to_le16(
1556 if (!dev
->ep
[tmp
].is_in
)
1559 if (dev
->ep
[tmp
].is_in
)
1562 if (ctrl
.wValue
!= __constant_cpu_to_le16(
1566 goku_clear_halt(&dev
->ep
[tmp
]);
1568 /* start ep0out status stage */
1569 writel(~(1<<0), ®s
->EOP
);
1570 dev
->ep
[0].stopped
= 1;
1571 dev
->ep0state
= EP0_STATUS
;
1573 case USB_RECIP_DEVICE
:
1574 /* device remote wakeup: always clear */
1575 if (ctrl
.wValue
!= __constant_cpu_to_le16(1))
1577 VDBG(dev
, "clear dev remote wakeup\n");
1579 case USB_RECIP_INTERFACE
:
1581 default: /* pass to gadget driver */
1591 VDBG(dev
, "SETUP %02x.%02x v%04x i%04x l%04x\n",
1592 ctrl
.bRequestType
, ctrl
.bRequest
,
1593 le16_to_cpu(ctrl
.wValue
), le16_to_cpu(ctrl
.wIndex
),
1594 le16_to_cpu(ctrl
.wLength
));
1597 /* hw wants to know when we're configured (or not) */
1598 dev
->req_config
= (ctrl
.bRequest
== USB_REQ_SET_CONFIGURATION
1599 && ctrl
.bRequestType
== USB_RECIP_DEVICE
);
1600 if (unlikely(dev
->req_config
))
1601 dev
->configured
= (ctrl
.wValue
!= __constant_cpu_to_le16(0));
1603 /* delegate everything to the gadget driver.
1604 * it may respond after this irq handler returns.
1606 spin_unlock (&dev
->lock
);
1607 tmp
= dev
->driver
->setup(&dev
->gadget
, &ctrl
);
1608 spin_lock (&dev
->lock
);
1609 if (unlikely(tmp
< 0)) {
1612 VDBG(dev
, "req %02x.%02x protocol STALL; err %d\n",
1613 ctrl
.bRequestType
, ctrl
.bRequest
, tmp
);
1615 command(regs
, COMMAND_STALL
, 0);
1616 dev
->ep
[0].stopped
= 1;
1617 dev
->ep0state
= EP0_STALL
;
1620 /* expect at least one data or status stage irq */
1623 #define ACK(irqbit) { \
1625 writel(~irqbit, ®s->int_status); \
1629 static irqreturn_t
goku_irq(int irq
, void *_dev
)
1631 struct goku_udc
*dev
= _dev
;
1632 struct goku_udc_regs __iomem
*regs
= dev
->regs
;
1634 u32 stat
, handled
= 0;
1635 unsigned i
, rescans
= 5;
1637 spin_lock(&dev
->lock
);
1640 stat
= readl(®s
->int_status
) & dev
->int_enable
;
1645 /* device-wide irqs */
1646 if (unlikely(stat
& INT_DEVWIDE
)) {
1647 if (stat
& INT_SYSERROR
) {
1648 ERROR(dev
, "system error\n");
1649 stop_activity(dev
, dev
->driver
);
1652 // FIXME have a neater way to prevent re-enumeration
1656 if (stat
& INT_PWRDETECT
) {
1657 writel(~stat
, ®s
->int_status
);
1658 if (readl(&dev
->regs
->power_detect
) & PW_DETECT
) {
1659 VDBG(dev
, "connect\n");
1662 DBG(dev
, "disconnect\n");
1663 if (dev
->gadget
.speed
== USB_SPEED_FULL
)
1664 stop_activity(dev
, dev
->driver
);
1665 dev
->ep0state
= EP0_DISCONNECT
;
1666 dev
->int_enable
= INT_DEVWIDE
;
1667 writel(dev
->int_enable
, &dev
->regs
->int_enable
);
1673 if (stat
& INT_SUSPEND
) {
1675 if (readl(®s
->ep_status
[0]) & EPxSTATUS_SUSPEND
) {
1676 switch (dev
->ep0state
) {
1677 case EP0_DISCONNECT
:
1683 DBG(dev
, "USB suspend\n");
1684 dev
->ep0state
= EP0_SUSPEND
;
1685 if (dev
->gadget
.speed
!= USB_SPEED_UNKNOWN
1687 && dev
->driver
->suspend
) {
1688 spin_unlock(&dev
->lock
);
1689 dev
->driver
->suspend(&dev
->gadget
);
1690 spin_lock(&dev
->lock
);
1693 if (dev
->ep0state
!= EP0_SUSPEND
) {
1694 DBG(dev
, "bogus USB resume %d\n",
1698 DBG(dev
, "USB resume\n");
1699 dev
->ep0state
= EP0_IDLE
;
1700 if (dev
->gadget
.speed
!= USB_SPEED_UNKNOWN
1702 && dev
->driver
->resume
) {
1703 spin_unlock(&dev
->lock
);
1704 dev
->driver
->resume(&dev
->gadget
);
1705 spin_lock(&dev
->lock
);
1710 if (stat
& INT_USBRESET
) { /* hub reset done */
1712 INFO(dev
, "USB reset done, gadget %s\n",
1713 dev
->driver
->driver
.name
);
1715 // and INT_ERR on some endpoint's crc/bitstuff/... problem
1718 /* progress ep0 setup, data, or status stages.
1719 * no transition {EP0_STATUS, EP0_STALL} --> EP0_IDLE; saves irqs
1721 if (stat
& INT_SETUP
) {
1726 if (stat
& INT_STATUSNAK
) {
1727 ACK(INT_STATUSNAK
|INT_ENDPOINT0
);
1728 if (dev
->ep0state
== EP0_IN
) {
1732 writel(~(1<<0), ®s
->EOP
);
1733 dev
->ep0state
= EP0_STATUS
;
1736 if (stat
& INT_ENDPOINT0
) {
1743 /* dma completion */
1744 if (stat
& INT_MSTRDEND
) { /* IN */
1746 ep
= &dev
->ep
[UDC_MSTRD_ENDPOINT
];
1748 dma_advance(dev
, ep
);
1750 if (stat
& INT_MSTWREND
) { /* OUT */
1752 ep
= &dev
->ep
[UDC_MSTWR_ENDPOINT
];
1754 dma_advance(dev
, ep
);
1756 if (stat
& INT_MSTWRTMOUT
) { /* OUT */
1757 ACK(INT_MSTWRTMOUT
);
1758 ep
= &dev
->ep
[UDC_MSTWR_ENDPOINT
];
1760 ERROR(dev
, "%s write timeout ?\n", ep
->ep
.name
);
1761 // reset dma? then dma_advance()
1765 for (i
= 1; i
< 4; i
++) {
1766 u32 tmp
= INT_EPxDATASET(i
);
1772 if (list_empty (&ep
->queue
))
1773 pio_irq_disable(dev
, regs
, i
);
1783 (void)readl(®s
->int_enable
);
1784 spin_unlock(&dev
->lock
);
1786 DBG(dev
, "unhandled irq status: %05x (%05x, %05x)\n", stat
,
1787 readl(®s
->int_status
), dev
->int_enable
);
1788 return IRQ_RETVAL(handled
);
1793 /*-------------------------------------------------------------------------*/
1795 static void gadget_release(struct device
*_dev
)
1797 struct goku_udc
*dev
= dev_get_drvdata(_dev
);
1802 /* tear down the binding between this driver and the pci device */
1804 static void goku_remove(struct pci_dev
*pdev
)
1806 struct goku_udc
*dev
= pci_get_drvdata(pdev
);
1808 DBG(dev
, "%s\n", __FUNCTION__
);
1810 BUG_ON(dev
->driver
);
1812 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1813 remove_proc_entry(proc_node_name
, NULL
);
1818 free_irq(pdev
->irq
, dev
);
1821 if (dev
->got_region
)
1822 release_mem_region(pci_resource_start (pdev
, 0),
1823 pci_resource_len (pdev
, 0));
1825 pci_disable_device(pdev
);
1826 device_unregister(&dev
->gadget
.dev
);
1828 pci_set_drvdata(pdev
, NULL
);
1830 the_controller
= NULL
;
1832 INFO(dev
, "unbind\n");
1835 /* wrap this driver around the specified pci device, but
1836 * don't respond over USB until a gadget driver binds to us.
1839 static int goku_probe(struct pci_dev
*pdev
, const struct pci_device_id
*id
)
1841 struct goku_udc
*dev
= NULL
;
1842 unsigned long resource
, len
;
1843 void __iomem
*base
= NULL
;
1846 /* if you want to support more than one controller in a system,
1847 * usb_gadget_driver_{register,unregister}() must change.
1849 if (the_controller
) {
1850 WARN(dev
, "ignoring %s\n", pci_name(pdev
));
1854 printk(KERN_ERR
"Check PCI %s IRQ setup!\n", pci_name(pdev
));
1859 /* alloc, and start init */
1860 dev
= kmalloc (sizeof *dev
, GFP_KERNEL
);
1862 pr_debug("enomem %s\n", pci_name(pdev
));
1867 memset(dev
, 0, sizeof *dev
);
1868 spin_lock_init(&dev
->lock
);
1870 dev
->gadget
.ops
= &goku_ops
;
1872 /* the "gadget" abstracts/virtualizes the controller */
1873 strcpy(dev
->gadget
.dev
.bus_id
, "gadget");
1874 dev
->gadget
.dev
.parent
= &pdev
->dev
;
1875 dev
->gadget
.dev
.dma_mask
= pdev
->dev
.dma_mask
;
1876 dev
->gadget
.dev
.release
= gadget_release
;
1877 dev
->gadget
.name
= driver_name
;
1879 /* now all the pci goodies ... */
1880 retval
= pci_enable_device(pdev
);
1882 DBG(dev
, "can't enable, %d\n", retval
);
1887 resource
= pci_resource_start(pdev
, 0);
1888 len
= pci_resource_len(pdev
, 0);
1889 if (!request_mem_region(resource
, len
, driver_name
)) {
1890 DBG(dev
, "controller already in use\n");
1894 dev
->got_region
= 1;
1896 base
= ioremap_nocache(resource
, len
);
1898 DBG(dev
, "can't map memory\n");
1902 dev
->regs
= (struct goku_udc_regs __iomem
*) base
;
1904 pci_set_drvdata(pdev
, dev
);
1905 INFO(dev
, "%s\n", driver_desc
);
1906 INFO(dev
, "version: " DRIVER_VERSION
" %s\n", dmastr());
1907 INFO(dev
, "irq %d, pci mem %p\n", pdev
->irq
, base
);
1909 /* init to known state, then setup irqs */
1912 if (request_irq(pdev
->irq
, goku_irq
, IRQF_SHARED
/*|IRQF_SAMPLE_RANDOM*/,
1913 driver_name
, dev
) != 0) {
1914 DBG(dev
, "request interrupt %d failed\n", pdev
->irq
);
1920 pci_set_master(pdev
);
1923 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1924 create_proc_read_entry(proc_node_name
, 0, NULL
, udc_proc_read
, dev
);
1928 the_controller
= dev
;
1929 device_register(&dev
->gadget
.dev
);
1940 /*-------------------------------------------------------------------------*/
1942 static struct pci_device_id pci_ids
[] = { {
1943 .class = ((PCI_CLASS_SERIAL_USB
<< 8) | 0xfe),
1945 .vendor
= 0x102f, /* Toshiba */
1946 .device
= 0x0107, /* this UDC */
1947 .subvendor
= PCI_ANY_ID
,
1948 .subdevice
= PCI_ANY_ID
,
1950 }, { /* end: all zeroes */ }
1952 MODULE_DEVICE_TABLE (pci
, pci_ids
);
1954 static struct pci_driver goku_pci_driver
= {
1955 .name
= (char *) driver_name
,
1956 .id_table
= pci_ids
,
1958 .probe
= goku_probe
,
1959 .remove
= goku_remove
,
1961 /* FIXME add power management support */
1964 static int __init
init (void)
1966 return pci_register_driver (&goku_pci_driver
);
1970 static void __exit
cleanup (void)
1972 pci_unregister_driver (&goku_pci_driver
);
1974 module_exit (cleanup
);