2 * Driver for the PLX NET2280 USB device controller.
3 * Specs and errata are available from <http://www.plxtech.com>.
5 * PLX Technology Inc. (formerly NetChip Technology) supported the
6 * development of this driver.
9 * CODE STATUS HIGHLIGHTS
11 * This driver should work well with most "gadget" drivers, including
12 * the File Storage, Serial, and Ethernet/RNDIS gadget drivers
13 * as well as Gadget Zero and Gadgetfs.
15 * DMA is enabled by default. Drivers using transfer queues might use
16 * DMA chaining to remove IRQ latencies between transfers. (Except when
17 * short OUT transfers happen.) Drivers can use the req->no_interrupt
18 * hint to completely eliminate some IRQs, if a later IRQ is guaranteed
19 * and DMA chaining is enabled.
21 * Note that almost all the errata workarounds here are only needed for
22 * rev1 chips. Rev1a silicon (0110) fixes almost all of them.
26 * Copyright (C) 2003 David Brownell
27 * Copyright (C) 2003-2005 PLX Technology, Inc.
29 * Modified Seth Levy 2005 PLX Technology, Inc. to provide compatibility
32 * This program is free software; you can redistribute it and/or modify
33 * it under the terms of the GNU General Public License as published by
34 * the Free Software Foundation; either version 2 of the License, or
35 * (at your option) any later version.
37 * This program is distributed in the hope that it will be useful,
38 * but WITHOUT ANY WARRANTY; without even the implied warranty of
39 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
40 * GNU General Public License for more details.
42 * You should have received a copy of the GNU General Public License
43 * along with this program; if not, write to the Free Software
44 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
47 #undef DEBUG /* messages on error and most fault paths */
48 #undef VERBOSE /* extra debug messages (success too) */
50 #include <linux/module.h>
51 #include <linux/pci.h>
52 #include <linux/dma-mapping.h>
53 #include <linux/kernel.h>
54 #include <linux/delay.h>
55 #include <linux/ioport.h>
56 #include <linux/slab.h>
57 #include <linux/errno.h>
58 #include <linux/init.h>
59 #include <linux/timer.h>
60 #include <linux/list.h>
61 #include <linux/interrupt.h>
62 #include <linux/moduleparam.h>
63 #include <linux/device.h>
64 #include <linux/usb/ch9.h>
65 #include <linux/usb_gadget.h>
67 #include <asm/byteorder.h>
70 #include <asm/system.h>
71 #include <asm/unaligned.h>
74 #define DRIVER_DESC "PLX NET228x USB Peripheral Controller"
75 #define DRIVER_VERSION "2005 Sept 27"
77 #define DMA_ADDR_INVALID (~(dma_addr_t)0)
78 #define EP_DONTUSE 13 /* nonzero */
80 #define USE_RDK_LEDS /* GPIO pins control three LEDs */
83 static const char driver_name
[] = "net2280";
84 static const char driver_desc
[] = DRIVER_DESC
;
86 static const char ep0name
[] = "ep0";
87 static const char *const ep_name
[] = {
89 "ep-a", "ep-b", "ep-c", "ep-d",
93 /* use_dma -- general goodness, fewer interrupts, less cpu load (vs PIO)
94 * use_dma_chaining -- dma descriptor queueing gives even more irq reduction
96 * The net2280 DMA engines are not tightly integrated with their FIFOs;
97 * not all cases are (yet) handled well in this driver or the silicon.
98 * Some gadget drivers work better with the dma support here than others.
99 * These two parameters let you use PIO or more aggressive DMA.
101 static int use_dma
= 1;
102 static int use_dma_chaining
= 0;
104 /* "modprobe net2280 use_dma=n" etc */
105 module_param (use_dma
, bool, S_IRUGO
);
106 module_param (use_dma_chaining
, bool, S_IRUGO
);
109 /* mode 0 == ep-{a,b,c,d} 1K fifo each
110 * mode 1 == ep-{a,b} 2K fifo each, ep-{c,d} unavailable
111 * mode 2 == ep-a 2K fifo, ep-{b,c} 1K each, ep-d unavailable
113 static ushort fifo_mode
= 0;
115 /* "modprobe net2280 fifo_mode=1" etc */
116 module_param (fifo_mode
, ushort
, 0644);
118 /* enable_suspend -- When enabled, the driver will respond to
119 * USB suspend requests by powering down the NET2280. Otherwise,
120 * USB suspend requests will be ignored. This is acceptible for
121 * self-powered devices
123 static int enable_suspend
= 0;
125 /* "modprobe net2280 enable_suspend=1" etc */
126 module_param (enable_suspend
, bool, S_IRUGO
);
129 #define DIR_STRING(bAddress) (((bAddress) & USB_DIR_IN) ? "in" : "out")
131 #if defined(CONFIG_USB_GADGET_DEBUG_FILES) || defined (DEBUG)
132 static char *type_string (u8 bmAttributes
)
134 switch ((bmAttributes
) & USB_ENDPOINT_XFERTYPE_MASK
) {
135 case USB_ENDPOINT_XFER_BULK
: return "bulk";
136 case USB_ENDPOINT_XFER_ISOC
: return "iso";
137 case USB_ENDPOINT_XFER_INT
: return "intr";
145 #define valid_bit __constant_cpu_to_le32 (1 << VALID_BIT)
146 #define dma_done_ie __constant_cpu_to_le32 (1 << DMA_DONE_INTERRUPT_ENABLE)
148 /*-------------------------------------------------------------------------*/
151 net2280_enable (struct usb_ep
*_ep
, const struct usb_endpoint_descriptor
*desc
)
154 struct net2280_ep
*ep
;
158 ep
= container_of (_ep
, struct net2280_ep
, ep
);
159 if (!_ep
|| !desc
|| ep
->desc
|| _ep
->name
== ep0name
160 || desc
->bDescriptorType
!= USB_DT_ENDPOINT
)
163 if (!dev
->driver
|| dev
->gadget
.speed
== USB_SPEED_UNKNOWN
)
166 /* erratum 0119 workaround ties up an endpoint number */
167 if ((desc
->bEndpointAddress
& 0x0f) == EP_DONTUSE
)
170 /* sanity check ep-e/ep-f since their fifos are small */
171 max
= le16_to_cpu (desc
->wMaxPacketSize
) & 0x1fff;
172 if (ep
->num
> 4 && max
> 64)
175 spin_lock_irqsave (&dev
->lock
, flags
);
176 _ep
->maxpacket
= max
& 0x7ff;
179 /* ep_reset() has already been called */
181 ep
->out_overflow
= 0;
183 /* set speed-dependent max packet; may kick in high bandwidth */
184 set_idx_reg (dev
->regs
, REG_EP_MAXPKT (dev
, ep
->num
), max
);
186 /* FIFO lines can't go to different packets. PIO is ok, so
187 * use it instead of troublesome (non-bulk) multi-packet DMA.
189 if (ep
->dma
&& (max
% 4) != 0 && use_dma_chaining
) {
190 DEBUG (ep
->dev
, "%s, no dma for maxpacket %d\n",
191 ep
->ep
.name
, ep
->ep
.maxpacket
);
195 /* set type, direction, address; reset fifo counters */
196 writel ((1 << FIFO_FLUSH
), &ep
->regs
->ep_stat
);
197 tmp
= (desc
->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
);
198 if (tmp
== USB_ENDPOINT_XFER_INT
) {
199 /* erratum 0105 workaround prevents hs NYET */
200 if (dev
->chiprev
== 0100
201 && dev
->gadget
.speed
== USB_SPEED_HIGH
202 && !(desc
->bEndpointAddress
& USB_DIR_IN
))
203 writel ((1 << CLEAR_NAK_OUT_PACKETS_MODE
),
205 } else if (tmp
== USB_ENDPOINT_XFER_BULK
) {
206 /* catch some particularly blatant driver bugs */
207 if ((dev
->gadget
.speed
== USB_SPEED_HIGH
209 || (dev
->gadget
.speed
== USB_SPEED_FULL
211 spin_unlock_irqrestore (&dev
->lock
, flags
);
215 ep
->is_iso
= (tmp
== USB_ENDPOINT_XFER_ISOC
) ? 1 : 0;
216 tmp
<<= ENDPOINT_TYPE
;
217 tmp
|= desc
->bEndpointAddress
;
218 tmp
|= (4 << ENDPOINT_BYTE_COUNT
); /* default full fifo lines */
219 tmp
|= 1 << ENDPOINT_ENABLE
;
222 /* for OUT transfers, block the rx fifo until a read is posted */
223 ep
->is_in
= (tmp
& USB_DIR_IN
) != 0;
225 writel ((1 << SET_NAK_OUT_PACKETS
), &ep
->regs
->ep_rsp
);
226 else if (dev
->pdev
->device
!= 0x2280) {
227 /* Added for 2282, Don't use nak packets on an in endpoint,
228 * this was ignored on 2280
230 writel ((1 << CLEAR_NAK_OUT_PACKETS
)
231 | (1 << CLEAR_NAK_OUT_PACKETS_MODE
), &ep
->regs
->ep_rsp
);
234 writel (tmp
, &ep
->regs
->ep_cfg
);
237 if (!ep
->dma
) { /* pio, per-packet */
238 tmp
= (1 << ep
->num
) | readl (&dev
->regs
->pciirqenb0
);
239 writel (tmp
, &dev
->regs
->pciirqenb0
);
241 tmp
= (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE
)
242 | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE
);
243 if (dev
->pdev
->device
== 0x2280)
244 tmp
|= readl (&ep
->regs
->ep_irqenb
);
245 writel (tmp
, &ep
->regs
->ep_irqenb
);
246 } else { /* dma, per-request */
247 tmp
= (1 << (8 + ep
->num
)); /* completion */
248 tmp
|= readl (&dev
->regs
->pciirqenb1
);
249 writel (tmp
, &dev
->regs
->pciirqenb1
);
251 /* for short OUT transfers, dma completions can't
252 * advance the queue; do it pio-style, by hand.
253 * NOTE erratum 0112 workaround #2
255 if ((desc
->bEndpointAddress
& USB_DIR_IN
) == 0) {
256 tmp
= (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT_ENABLE
);
257 writel (tmp
, &ep
->regs
->ep_irqenb
);
259 tmp
= (1 << ep
->num
) | readl (&dev
->regs
->pciirqenb0
);
260 writel (tmp
, &dev
->regs
->pciirqenb0
);
264 tmp
= desc
->bEndpointAddress
;
265 DEBUG (dev
, "enabled %s (ep%d%s-%s) %s max %04x\n",
266 _ep
->name
, tmp
& 0x0f, DIR_STRING (tmp
),
267 type_string (desc
->bmAttributes
),
268 ep
->dma
? "dma" : "pio", max
);
270 /* pci writes may still be posted */
271 spin_unlock_irqrestore (&dev
->lock
, flags
);
275 static int handshake (u32 __iomem
*ptr
, u32 mask
, u32 done
, int usec
)
280 result
= readl (ptr
);
281 if (result
== ~(u32
)0) /* "device unplugged" */
292 static const struct usb_ep_ops net2280_ep_ops
;
294 static void ep_reset (struct net2280_regs __iomem
*regs
, struct net2280_ep
*ep
)
299 INIT_LIST_HEAD (&ep
->queue
);
301 ep
->ep
.maxpacket
= ~0;
302 ep
->ep
.ops
= &net2280_ep_ops
;
304 /* disable the dma, irqs, endpoint... */
306 writel (0, &ep
->dma
->dmactl
);
307 writel ( (1 << DMA_SCATTER_GATHER_DONE_INTERRUPT
)
308 | (1 << DMA_TRANSACTION_DONE_INTERRUPT
)
310 , &ep
->dma
->dmastat
);
312 tmp
= readl (®s
->pciirqenb0
);
313 tmp
&= ~(1 << ep
->num
);
314 writel (tmp
, ®s
->pciirqenb0
);
316 tmp
= readl (®s
->pciirqenb1
);
317 tmp
&= ~(1 << (8 + ep
->num
)); /* completion */
318 writel (tmp
, ®s
->pciirqenb1
);
320 writel (0, &ep
->regs
->ep_irqenb
);
322 /* init to our chosen defaults, notably so that we NAK OUT
323 * packets until the driver queues a read (+note erratum 0112)
325 if (!ep
->is_in
|| ep
->dev
->pdev
->device
== 0x2280) {
326 tmp
= (1 << SET_NAK_OUT_PACKETS_MODE
)
327 | (1 << SET_NAK_OUT_PACKETS
)
328 | (1 << CLEAR_EP_HIDE_STATUS_PHASE
)
329 | (1 << CLEAR_INTERRUPT_MODE
);
332 tmp
= (1 << CLEAR_NAK_OUT_PACKETS_MODE
)
333 | (1 << CLEAR_NAK_OUT_PACKETS
)
334 | (1 << CLEAR_EP_HIDE_STATUS_PHASE
)
335 | (1 << CLEAR_INTERRUPT_MODE
);
339 tmp
|= (1 << CLEAR_ENDPOINT_TOGGLE
)
340 | (1 << CLEAR_ENDPOINT_HALT
);
342 writel (tmp
, &ep
->regs
->ep_rsp
);
344 /* scrub most status bits, and flush any fifo state */
345 if (ep
->dev
->pdev
->device
== 0x2280)
346 tmp
= (1 << FIFO_OVERFLOW
)
347 | (1 << FIFO_UNDERFLOW
);
351 writel (tmp
| (1 << TIMEOUT
)
352 | (1 << USB_STALL_SENT
)
353 | (1 << USB_IN_NAK_SENT
)
354 | (1 << USB_IN_ACK_RCVD
)
355 | (1 << USB_OUT_PING_NAK_SENT
)
356 | (1 << USB_OUT_ACK_SENT
)
358 | (1 << SHORT_PACKET_OUT_DONE_INTERRUPT
)
359 | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT
)
360 | (1 << DATA_PACKET_RECEIVED_INTERRUPT
)
361 | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT
)
362 | (1 << DATA_OUT_PING_TOKEN_INTERRUPT
)
363 | (1 << DATA_IN_TOKEN_INTERRUPT
)
364 , &ep
->regs
->ep_stat
);
366 /* fifo size is handled separately */
369 static void nuke (struct net2280_ep
*);
371 static int net2280_disable (struct usb_ep
*_ep
)
373 struct net2280_ep
*ep
;
376 ep
= container_of (_ep
, struct net2280_ep
, ep
);
377 if (!_ep
|| !ep
->desc
|| _ep
->name
== ep0name
)
380 spin_lock_irqsave (&ep
->dev
->lock
, flags
);
382 ep_reset (ep
->dev
->regs
, ep
);
384 VDEBUG (ep
->dev
, "disabled %s %s\n",
385 ep
->dma
? "dma" : "pio", _ep
->name
);
387 /* synch memory views with the device */
388 (void) readl (&ep
->regs
->ep_cfg
);
390 if (use_dma
&& !ep
->dma
&& ep
->num
>= 1 && ep
->num
<= 4)
391 ep
->dma
= &ep
->dev
->dma
[ep
->num
- 1];
393 spin_unlock_irqrestore (&ep
->dev
->lock
, flags
);
397 /*-------------------------------------------------------------------------*/
399 static struct usb_request
*
400 net2280_alloc_request (struct usb_ep
*_ep
, gfp_t gfp_flags
)
402 struct net2280_ep
*ep
;
403 struct net2280_request
*req
;
407 ep
= container_of (_ep
, struct net2280_ep
, ep
);
409 req
= kzalloc(sizeof(*req
), gfp_flags
);
413 req
->req
.dma
= DMA_ADDR_INVALID
;
414 INIT_LIST_HEAD (&req
->queue
);
416 /* this dma descriptor may be swapped with the previous dummy */
418 struct net2280_dma
*td
;
420 td
= pci_pool_alloc (ep
->dev
->requests
, gfp_flags
,
426 td
->dmacount
= 0; /* not VALID */
427 td
->dmaaddr
= __constant_cpu_to_le32 (DMA_ADDR_INVALID
);
428 td
->dmadesc
= td
->dmaaddr
;
435 net2280_free_request (struct usb_ep
*_ep
, struct usb_request
*_req
)
437 struct net2280_ep
*ep
;
438 struct net2280_request
*req
;
440 ep
= container_of (_ep
, struct net2280_ep
, ep
);
444 req
= container_of (_req
, struct net2280_request
, req
);
445 WARN_ON (!list_empty (&req
->queue
));
447 pci_pool_free (ep
->dev
->requests
, req
->td
, req
->td_dma
);
451 /*-------------------------------------------------------------------------*/
454 * dma-coherent memory allocation (for dma-capable endpoints)
456 * NOTE: the dma_*_coherent() API calls suck. Most implementations are
457 * (a) page-oriented, so small buffers lose big; and (b) asymmetric with
458 * respect to calls with irqs disabled: alloc is safe, free is not.
459 * We currently work around (b), but not (a).
463 net2280_alloc_buffer (
471 struct net2280_ep
*ep
;
473 ep
= container_of (_ep
, struct net2280_ep
, ep
);
476 *dma
= DMA_ADDR_INVALID
;
479 retval
= dma_alloc_coherent(&ep
->dev
->pdev
->dev
,
480 bytes
, dma
, gfp_flags
);
482 retval
= kmalloc(bytes
, gfp_flags
);
486 static DEFINE_SPINLOCK(buflock
);
487 static LIST_HEAD(buffers
);
490 struct list_head list
;
496 static void do_free(unsigned long ignored
)
498 spin_lock_irq(&buflock
);
499 while (!list_empty(&buffers
)) {
500 struct free_record
*buf
;
502 buf
= list_entry(buffers
.next
, struct free_record
, list
);
503 list_del(&buf
->list
);
504 spin_unlock_irq(&buflock
);
506 dma_free_coherent(buf
->dev
, buf
->bytes
, buf
, buf
->dma
);
508 spin_lock_irq(&buflock
);
510 spin_unlock_irq(&buflock
);
513 static DECLARE_TASKLET(deferred_free
, do_free
, 0);
516 net2280_free_buffer (
522 /* free memory into the right allocator */
523 if (dma
!= DMA_ADDR_INVALID
) {
524 struct net2280_ep
*ep
;
525 struct free_record
*buf
= address
;
528 ep
= container_of(_ep
, struct net2280_ep
, ep
);
532 ep
= container_of (_ep
, struct net2280_ep
, ep
);
533 buf
->dev
= &ep
->dev
->pdev
->dev
;
537 spin_lock_irqsave(&buflock
, flags
);
538 list_add_tail(&buf
->list
, &buffers
);
539 tasklet_schedule(&deferred_free
);
540 spin_unlock_irqrestore(&buflock
, flags
);
545 /*-------------------------------------------------------------------------*/
547 /* load a packet into the fifo we use for usb IN transfers.
548 * works for all endpoints.
550 * NOTE: pio with ep-a..ep-d could stuff multiple packets into the fifo
551 * at a time, but this code is simpler because it knows it only writes
552 * one packet. ep-a..ep-d should use dma instead.
555 write_fifo (struct net2280_ep
*ep
, struct usb_request
*req
)
557 struct net2280_ep_regs __iomem
*regs
= ep
->regs
;
560 unsigned count
, total
;
562 /* INVARIANT: fifo is currently empty. (testable) */
565 buf
= req
->buf
+ req
->actual
;
567 total
= req
->length
- req
->actual
;
573 /* write just one packet at a time */
574 count
= ep
->ep
.maxpacket
;
575 if (count
> total
) /* min() cannot be used on a bitfield */
578 VDEBUG (ep
->dev
, "write %s fifo (IN) %d bytes%s req %p\n",
580 (count
!= ep
->ep
.maxpacket
) ? " (short)" : "",
583 /* NOTE be careful if you try to align these. fifo lines
584 * should normally be full (4 bytes) and successive partial
585 * lines are ok only in certain cases.
587 tmp
= get_unaligned ((u32
*)buf
);
589 writel (tmp
, ®s
->ep_data
);
594 /* last fifo entry is "short" unless we wrote a full packet.
595 * also explicitly validate last word in (periodic) transfers
596 * when maxpacket is not a multiple of 4 bytes.
598 if (count
|| total
< ep
->ep
.maxpacket
) {
599 tmp
= count
? get_unaligned ((u32
*)buf
) : count
;
601 set_fifo_bytecount (ep
, count
& 0x03);
602 writel (tmp
, ®s
->ep_data
);
605 /* pci writes may still be posted */
608 /* work around erratum 0106: PCI and USB race over the OUT fifo.
609 * caller guarantees chiprev 0100, out endpoint is NAKing, and
610 * there's no real data in the fifo.
612 * NOTE: also used in cases where that erratum doesn't apply:
613 * where the host wrote "too much" data to us.
615 static void out_flush (struct net2280_ep
*ep
)
620 ASSERT_OUT_NAKING (ep
);
622 statp
= &ep
->regs
->ep_stat
;
623 writel ( (1 << DATA_OUT_PING_TOKEN_INTERRUPT
)
624 | (1 << DATA_PACKET_RECEIVED_INTERRUPT
)
626 writel ((1 << FIFO_FLUSH
), statp
);
629 if (tmp
& (1 << DATA_OUT_PING_TOKEN_INTERRUPT
)
630 /* high speed did bulk NYET; fifo isn't filling */
631 && ep
->dev
->gadget
.speed
== USB_SPEED_FULL
) {
634 usec
= 50; /* 64 byte bulk/interrupt */
635 handshake (statp
, (1 << USB_OUT_PING_NAK_SENT
),
636 (1 << USB_OUT_PING_NAK_SENT
), usec
);
637 /* NAK done; now CLEAR_NAK_OUT_PACKETS is safe */
641 /* unload packet(s) from the fifo we use for usb OUT transfers.
642 * returns true iff the request completed, because of short packet
643 * or the request buffer having filled with full packets.
645 * for ep-a..ep-d this will read multiple packets out when they
646 * have been accepted.
649 read_fifo (struct net2280_ep
*ep
, struct net2280_request
*req
)
651 struct net2280_ep_regs __iomem
*regs
= ep
->regs
;
652 u8
*buf
= req
->req
.buf
+ req
->req
.actual
;
653 unsigned count
, tmp
, is_short
;
654 unsigned cleanup
= 0, prevent
= 0;
656 /* erratum 0106 ... packets coming in during fifo reads might
657 * be incompletely rejected. not all cases have workarounds.
659 if (ep
->dev
->chiprev
== 0x0100
660 && ep
->dev
->gadget
.speed
== USB_SPEED_FULL
) {
662 tmp
= readl (&ep
->regs
->ep_stat
);
663 if ((tmp
& (1 << NAK_OUT_PACKETS
)))
665 else if ((tmp
& (1 << FIFO_FULL
))) {
666 start_out_naking (ep
);
669 /* else: hope we don't see the problem */
672 /* never overflow the rx buffer. the fifo reads packets until
673 * it sees a short one; we might not be ready for them all.
676 count
= readl (®s
->ep_avail
);
677 if (unlikely (count
== 0)) {
679 tmp
= readl (&ep
->regs
->ep_stat
);
680 count
= readl (®s
->ep_avail
);
681 /* handled that data already? */
682 if (count
== 0 && (tmp
& (1 << NAK_OUT_PACKETS
)) == 0)
686 tmp
= req
->req
.length
- req
->req
.actual
;
688 /* as with DMA, data overflow gets flushed */
689 if ((tmp
% ep
->ep
.maxpacket
) != 0) {
691 "%s out fifo %d bytes, expected %d\n",
692 ep
->ep
.name
, count
, tmp
);
693 req
->req
.status
= -EOVERFLOW
;
695 /* NAK_OUT_PACKETS will be set, so flushing is safe;
696 * the next read will start with the next packet
698 } /* else it's a ZLP, no worries */
701 req
->req
.actual
+= count
;
703 is_short
= (count
== 0) || ((count
% ep
->ep
.maxpacket
) != 0);
705 VDEBUG (ep
->dev
, "read %s fifo (OUT) %d bytes%s%s%s req %p %d/%d\n",
706 ep
->ep
.name
, count
, is_short
? " (short)" : "",
707 cleanup
? " flush" : "", prevent
? " nak" : "",
708 req
, req
->req
.actual
, req
->req
.length
);
711 tmp
= readl (®s
->ep_data
);
713 put_unaligned (tmp
, (u32
*)buf
);
718 tmp
= readl (®s
->ep_data
);
719 /* LE conversion is implicit here: */
728 writel ((1 << CLEAR_NAK_OUT_PACKETS
), &ep
->regs
->ep_rsp
);
729 (void) readl (&ep
->regs
->ep_rsp
);
732 return is_short
|| ((req
->req
.actual
== req
->req
.length
)
736 /* fill out dma descriptor to match a given request */
738 fill_dma_desc (struct net2280_ep
*ep
, struct net2280_request
*req
, int valid
)
740 struct net2280_dma
*td
= req
->td
;
741 u32 dmacount
= req
->req
.length
;
743 /* don't let DMA continue after a short OUT packet,
744 * so overruns can't affect the next transfer.
745 * in case of overruns on max-size packets, we can't
746 * stop the fifo from filling but we can flush it.
749 dmacount
|= (1 << DMA_DIRECTION
);
750 if ((!ep
->is_in
&& (dmacount
% ep
->ep
.maxpacket
) != 0)
751 || ep
->dev
->pdev
->device
!= 0x2280)
752 dmacount
|= (1 << END_OF_CHAIN
);
756 dmacount
|= (1 << VALID_BIT
);
757 if (likely(!req
->req
.no_interrupt
|| !use_dma_chaining
))
758 dmacount
|= (1 << DMA_DONE_INTERRUPT_ENABLE
);
760 /* td->dmadesc = previously set by caller */
761 td
->dmaaddr
= cpu_to_le32 (req
->req
.dma
);
763 /* 2280 may be polling VALID_BIT through ep->dma->dmadesc */
765 td
->dmacount
= cpu_to_le32p (&dmacount
);
768 static const u32 dmactl_default
=
769 (1 << DMA_SCATTER_GATHER_DONE_INTERRUPT
)
770 | (1 << DMA_CLEAR_COUNT_ENABLE
)
771 /* erratum 0116 workaround part 1 (use POLLING) */
772 | (POLL_100_USEC
<< DESCRIPTOR_POLLING_RATE
)
773 | (1 << DMA_VALID_BIT_POLLING_ENABLE
)
774 | (1 << DMA_VALID_BIT_ENABLE
)
775 | (1 << DMA_SCATTER_GATHER_ENABLE
)
776 /* erratum 0116 workaround part 2 (no AUTOSTART) */
779 static inline void spin_stop_dma (struct net2280_dma_regs __iomem
*dma
)
781 handshake (&dma
->dmactl
, (1 << DMA_ENABLE
), 0, 50);
784 static inline void stop_dma (struct net2280_dma_regs __iomem
*dma
)
786 writel (readl (&dma
->dmactl
) & ~(1 << DMA_ENABLE
), &dma
->dmactl
);
790 static void start_queue (struct net2280_ep
*ep
, u32 dmactl
, u32 td_dma
)
792 struct net2280_dma_regs __iomem
*dma
= ep
->dma
;
793 unsigned int tmp
= (1 << VALID_BIT
) | (ep
->is_in
<< DMA_DIRECTION
);
795 if (ep
->dev
->pdev
->device
!= 0x2280)
796 tmp
|= (1 << END_OF_CHAIN
);
798 writel (tmp
, &dma
->dmacount
);
799 writel (readl (&dma
->dmastat
), &dma
->dmastat
);
801 writel (td_dma
, &dma
->dmadesc
);
802 writel (dmactl
, &dma
->dmactl
);
804 /* erratum 0116 workaround part 3: pci arbiter away from net2280 */
805 (void) readl (&ep
->dev
->pci
->pcimstctl
);
807 writel ((1 << DMA_START
), &dma
->dmastat
);
810 stop_out_naking (ep
);
813 static void start_dma (struct net2280_ep
*ep
, struct net2280_request
*req
)
816 struct net2280_dma_regs __iomem
*dma
= ep
->dma
;
818 /* FIXME can't use DMA for ZLPs */
820 /* on this path we "know" there's no dma active (yet) */
821 WARN_ON (readl (&dma
->dmactl
) & (1 << DMA_ENABLE
));
822 writel (0, &ep
->dma
->dmactl
);
824 /* previous OUT packet might have been short */
825 if (!ep
->is_in
&& ((tmp
= readl (&ep
->regs
->ep_stat
))
826 & (1 << NAK_OUT_PACKETS
)) != 0) {
827 writel ((1 << SHORT_PACKET_TRANSFERRED_INTERRUPT
),
830 tmp
= readl (&ep
->regs
->ep_avail
);
832 writel (readl (&dma
->dmastat
), &dma
->dmastat
);
834 /* transfer all/some fifo data */
835 writel (req
->req
.dma
, &dma
->dmaaddr
);
836 tmp
= min (tmp
, req
->req
.length
);
838 /* dma irq, faking scatterlist status */
839 req
->td
->dmacount
= cpu_to_le32 (req
->req
.length
- tmp
);
840 writel ((1 << DMA_DONE_INTERRUPT_ENABLE
)
841 | tmp
, &dma
->dmacount
);
842 req
->td
->dmadesc
= 0;
845 writel ((1 << DMA_ENABLE
), &dma
->dmactl
);
846 writel ((1 << DMA_START
), &dma
->dmastat
);
851 tmp
= dmactl_default
;
853 /* force packet boundaries between dma requests, but prevent the
854 * controller from automagically writing a last "short" packet
855 * (zero length) unless the driver explicitly said to do that.
858 if (likely ((req
->req
.length
% ep
->ep
.maxpacket
) != 0
860 tmp
|= (1 << DMA_FIFO_VALIDATE
);
861 ep
->in_fifo_validate
= 1;
863 ep
->in_fifo_validate
= 0;
866 /* init req->td, pointing to the current dummy */
867 req
->td
->dmadesc
= cpu_to_le32 (ep
->td_dma
);
868 fill_dma_desc (ep
, req
, 1);
870 if (!use_dma_chaining
)
871 req
->td
->dmacount
|= __constant_cpu_to_le32 (1 << END_OF_CHAIN
);
873 start_queue (ep
, tmp
, req
->td_dma
);
877 queue_dma (struct net2280_ep
*ep
, struct net2280_request
*req
, int valid
)
879 struct net2280_dma
*end
;
882 /* swap new dummy for old, link; fill and maybe activate */
888 ep
->td_dma
= req
->td_dma
;
891 end
->dmadesc
= cpu_to_le32 (ep
->td_dma
);
893 fill_dma_desc (ep
, req
, valid
);
897 done (struct net2280_ep
*ep
, struct net2280_request
*req
, int status
)
900 unsigned stopped
= ep
->stopped
;
902 list_del_init (&req
->queue
);
904 if (req
->req
.status
== -EINPROGRESS
)
905 req
->req
.status
= status
;
907 status
= req
->req
.status
;
911 pci_unmap_single (dev
->pdev
, req
->req
.dma
, req
->req
.length
,
912 ep
->is_in
? PCI_DMA_TODEVICE
: PCI_DMA_FROMDEVICE
);
913 req
->req
.dma
= DMA_ADDR_INVALID
;
917 if (status
&& status
!= -ESHUTDOWN
)
918 VDEBUG (dev
, "complete %s req %p stat %d len %u/%u\n",
919 ep
->ep
.name
, &req
->req
, status
,
920 req
->req
.actual
, req
->req
.length
);
922 /* don't modify queue heads during completion callback */
924 spin_unlock (&dev
->lock
);
925 req
->req
.complete (&ep
->ep
, &req
->req
);
926 spin_lock (&dev
->lock
);
927 ep
->stopped
= stopped
;
930 /*-------------------------------------------------------------------------*/
933 net2280_queue (struct usb_ep
*_ep
, struct usb_request
*_req
, gfp_t gfp_flags
)
935 struct net2280_request
*req
;
936 struct net2280_ep
*ep
;
940 /* we always require a cpu-view buffer, so that we can
941 * always use pio (as fallback or whatever).
943 req
= container_of (_req
, struct net2280_request
, req
);
944 if (!_req
|| !_req
->complete
|| !_req
->buf
945 || !list_empty (&req
->queue
))
947 if (_req
->length
> (~0 & DMA_BYTE_COUNT_MASK
))
949 ep
= container_of (_ep
, struct net2280_ep
, ep
);
950 if (!_ep
|| (!ep
->desc
&& ep
->num
!= 0))
953 if (!dev
->driver
|| dev
->gadget
.speed
== USB_SPEED_UNKNOWN
)
956 /* FIXME implement PIO fallback for ZLPs with DMA */
957 if (ep
->dma
&& _req
->length
== 0)
960 /* set up dma mapping in case the caller didn't */
961 if (ep
->dma
&& _req
->dma
== DMA_ADDR_INVALID
) {
962 _req
->dma
= pci_map_single (dev
->pdev
, _req
->buf
, _req
->length
,
963 ep
->is_in
? PCI_DMA_TODEVICE
: PCI_DMA_FROMDEVICE
);
968 VDEBUG (dev
, "%s queue req %p, len %d buf %p\n",
969 _ep
->name
, _req
, _req
->length
, _req
->buf
);
972 spin_lock_irqsave (&dev
->lock
, flags
);
974 _req
->status
= -EINPROGRESS
;
977 /* kickstart this i/o queue? */
978 if (list_empty (&ep
->queue
) && !ep
->stopped
) {
979 /* use DMA if the endpoint supports it, else pio */
983 /* maybe there's no control data, just status ack */
984 if (ep
->num
== 0 && _req
->length
== 0) {
987 VDEBUG (dev
, "%s status ack\n", ep
->ep
.name
);
991 /* PIO ... stuff the fifo, or unblock it. */
993 write_fifo (ep
, _req
);
994 else if (list_empty (&ep
->queue
)) {
997 /* OUT FIFO might have packet(s) buffered */
998 s
= readl (&ep
->regs
->ep_stat
);
999 if ((s
& (1 << FIFO_EMPTY
)) == 0) {
1000 /* note: _req->short_not_ok is
1001 * ignored here since PIO _always_
1002 * stops queue advance here, and
1003 * _req->status doesn't change for
1004 * short reads (only _req->actual)
1006 if (read_fifo (ep
, req
)) {
1010 /* don't queue it */
1013 s
= readl (&ep
->regs
->ep_stat
);
1016 /* don't NAK, let the fifo fill */
1017 if (req
&& (s
& (1 << NAK_OUT_PACKETS
)))
1018 writel ((1 << CLEAR_NAK_OUT_PACKETS
),
1023 } else if (ep
->dma
) {
1029 /* preventing magic zlps is per-engine state, not
1030 * per-transfer; irq logic must recover hiccups.
1032 expect
= likely (req
->req
.zero
1033 || (req
->req
.length
% ep
->ep
.maxpacket
) != 0);
1034 if (expect
!= ep
->in_fifo_validate
)
1037 queue_dma (ep
, req
, valid
);
1039 } /* else the irq handler advances the queue. */
1043 list_add_tail (&req
->queue
, &ep
->queue
);
1045 spin_unlock_irqrestore (&dev
->lock
, flags
);
1047 /* pci writes may still be posted */
1053 struct net2280_ep
*ep
,
1054 struct net2280_request
*req
,
1059 req
->req
.actual
= req
->req
.length
- (DMA_BYTE_COUNT_MASK
& dmacount
);
1060 done (ep
, req
, status
);
1063 static void restart_dma (struct net2280_ep
*ep
);
1065 static void scan_dma_completions (struct net2280_ep
*ep
)
1067 /* only look at descriptors that were "naturally" retired,
1068 * so fifo and list head state won't matter
1070 while (!list_empty (&ep
->queue
)) {
1071 struct net2280_request
*req
;
1074 req
= list_entry (ep
->queue
.next
,
1075 struct net2280_request
, queue
);
1079 tmp
= le32_to_cpup (&req
->td
->dmacount
);
1080 if ((tmp
& (1 << VALID_BIT
)) != 0)
1083 /* SHORT_PACKET_TRANSFERRED_INTERRUPT handles "usb-short"
1084 * cases where DMA must be aborted; this code handles
1085 * all non-abort DMA completions.
1087 if (unlikely (req
->td
->dmadesc
== 0)) {
1089 tmp
= readl (&ep
->dma
->dmacount
);
1090 if (tmp
& DMA_BYTE_COUNT_MASK
)
1092 /* single transfer mode */
1093 dma_done (ep
, req
, tmp
, 0);
1095 } else if (!ep
->is_in
1096 && (req
->req
.length
% ep
->ep
.maxpacket
) != 0) {
1097 tmp
= readl (&ep
->regs
->ep_stat
);
1099 /* AVOID TROUBLE HERE by not issuing short reads from
1100 * your gadget driver. That helps avoids errata 0121,
1101 * 0122, and 0124; not all cases trigger the warning.
1103 if ((tmp
& (1 << NAK_OUT_PACKETS
)) == 0) {
1104 WARN (ep
->dev
, "%s lost packet sync!\n",
1106 req
->req
.status
= -EOVERFLOW
;
1107 } else if ((tmp
= readl (&ep
->regs
->ep_avail
)) != 0) {
1108 /* fifo gets flushed later */
1109 ep
->out_overflow
= 1;
1110 DEBUG (ep
->dev
, "%s dma, discard %d len %d\n",
1113 req
->req
.status
= -EOVERFLOW
;
1116 dma_done (ep
, req
, tmp
, 0);
1120 static void restart_dma (struct net2280_ep
*ep
)
1122 struct net2280_request
*req
;
1123 u32 dmactl
= dmactl_default
;
1127 req
= list_entry (ep
->queue
.next
, struct net2280_request
, queue
);
1129 if (!use_dma_chaining
) {
1130 start_dma (ep
, req
);
1134 /* the 2280 will be processing the queue unless queue hiccups after
1135 * the previous transfer:
1136 * IN: wanted automagic zlp, head doesn't (or vice versa)
1137 * DMA_FIFO_VALIDATE doesn't init from dma descriptors.
1138 * OUT: was "usb-short", we must restart.
1140 if (ep
->is_in
&& !req
->valid
) {
1141 struct net2280_request
*entry
, *prev
= NULL
;
1142 int reqmode
, done
= 0;
1144 DEBUG (ep
->dev
, "%s dma hiccup td %p\n", ep
->ep
.name
, req
->td
);
1145 ep
->in_fifo_validate
= likely (req
->req
.zero
1146 || (req
->req
.length
% ep
->ep
.maxpacket
) != 0);
1147 if (ep
->in_fifo_validate
)
1148 dmactl
|= (1 << DMA_FIFO_VALIDATE
);
1149 list_for_each_entry (entry
, &ep
->queue
, queue
) {
1154 dmacount
= entry
->td
->dmacount
;
1156 reqmode
= likely (entry
->req
.zero
1157 || (entry
->req
.length
1158 % ep
->ep
.maxpacket
) != 0);
1159 if (reqmode
== ep
->in_fifo_validate
) {
1161 dmacount
|= valid_bit
;
1162 entry
->td
->dmacount
= dmacount
;
1166 /* force a hiccup */
1167 prev
->td
->dmacount
|= dma_done_ie
;
1172 /* walk the rest of the queue so unlinks behave */
1174 dmacount
&= ~valid_bit
;
1175 entry
->td
->dmacount
= dmacount
;
1180 writel (0, &ep
->dma
->dmactl
);
1181 start_queue (ep
, dmactl
, req
->td_dma
);
1184 static void abort_dma (struct net2280_ep
*ep
)
1186 /* abort the current transfer */
1187 if (likely (!list_empty (&ep
->queue
))) {
1188 /* FIXME work around errata 0121, 0122, 0124 */
1189 writel ((1 << DMA_ABORT
), &ep
->dma
->dmastat
);
1190 spin_stop_dma (ep
->dma
);
1193 scan_dma_completions (ep
);
1196 /* dequeue ALL requests */
1197 static void nuke (struct net2280_ep
*ep
)
1199 struct net2280_request
*req
;
1201 /* called with spinlock held */
1205 while (!list_empty (&ep
->queue
)) {
1206 req
= list_entry (ep
->queue
.next
,
1207 struct net2280_request
,
1209 done (ep
, req
, -ESHUTDOWN
);
1213 /* dequeue JUST ONE request */
1214 static int net2280_dequeue (struct usb_ep
*_ep
, struct usb_request
*_req
)
1216 struct net2280_ep
*ep
;
1217 struct net2280_request
*req
;
1218 unsigned long flags
;
1222 ep
= container_of (_ep
, struct net2280_ep
, ep
);
1223 if (!_ep
|| (!ep
->desc
&& ep
->num
!= 0) || !_req
)
1226 spin_lock_irqsave (&ep
->dev
->lock
, flags
);
1227 stopped
= ep
->stopped
;
1229 /* quiesce dma while we patch the queue */
1233 dmactl
= readl (&ep
->dma
->dmactl
);
1234 /* WARNING erratum 0127 may kick in ... */
1236 scan_dma_completions (ep
);
1239 /* make sure it's still queued on this endpoint */
1240 list_for_each_entry (req
, &ep
->queue
, queue
) {
1241 if (&req
->req
== _req
)
1244 if (&req
->req
!= _req
) {
1245 spin_unlock_irqrestore (&ep
->dev
->lock
, flags
);
1249 /* queue head may be partially complete. */
1250 if (ep
->queue
.next
== &req
->queue
) {
1252 DEBUG (ep
->dev
, "unlink (%s) dma\n", _ep
->name
);
1253 _req
->status
= -ECONNRESET
;
1255 if (likely (ep
->queue
.next
== &req
->queue
)) {
1256 // NOTE: misreports single-transfer mode
1257 req
->td
->dmacount
= 0; /* invalidate */
1259 readl (&ep
->dma
->dmacount
),
1263 DEBUG (ep
->dev
, "unlink (%s) pio\n", _ep
->name
);
1264 done (ep
, req
, -ECONNRESET
);
1268 /* patch up hardware chaining data */
1269 } else if (ep
->dma
&& use_dma_chaining
) {
1270 if (req
->queue
.prev
== ep
->queue
.next
) {
1271 writel (le32_to_cpu (req
->td
->dmadesc
),
1273 if (req
->td
->dmacount
& dma_done_ie
)
1274 writel (readl (&ep
->dma
->dmacount
)
1275 | le32_to_cpu(dma_done_ie
),
1276 &ep
->dma
->dmacount
);
1278 struct net2280_request
*prev
;
1280 prev
= list_entry (req
->queue
.prev
,
1281 struct net2280_request
, queue
);
1282 prev
->td
->dmadesc
= req
->td
->dmadesc
;
1283 if (req
->td
->dmacount
& dma_done_ie
)
1284 prev
->td
->dmacount
|= dma_done_ie
;
1289 done (ep
, req
, -ECONNRESET
);
1290 ep
->stopped
= stopped
;
1293 /* turn off dma on inactive queues */
1294 if (list_empty (&ep
->queue
))
1296 else if (!ep
->stopped
) {
1297 /* resume current request, or start new one */
1299 writel (dmactl
, &ep
->dma
->dmactl
);
1301 start_dma (ep
, list_entry (ep
->queue
.next
,
1302 struct net2280_request
, queue
));
1306 spin_unlock_irqrestore (&ep
->dev
->lock
, flags
);
1310 /*-------------------------------------------------------------------------*/
1312 static int net2280_fifo_status (struct usb_ep
*_ep
);
1315 net2280_set_halt (struct usb_ep
*_ep
, int value
)
1317 struct net2280_ep
*ep
;
1318 unsigned long flags
;
1321 ep
= container_of (_ep
, struct net2280_ep
, ep
);
1322 if (!_ep
|| (!ep
->desc
&& ep
->num
!= 0))
1324 if (!ep
->dev
->driver
|| ep
->dev
->gadget
.speed
== USB_SPEED_UNKNOWN
)
1326 if (ep
->desc
/* not ep0 */ && (ep
->desc
->bmAttributes
& 0x03)
1327 == USB_ENDPOINT_XFER_ISOC
)
1330 spin_lock_irqsave (&ep
->dev
->lock
, flags
);
1331 if (!list_empty (&ep
->queue
))
1333 else if (ep
->is_in
&& value
&& net2280_fifo_status (_ep
) != 0)
1336 VDEBUG (ep
->dev
, "%s %s halt\n", _ep
->name
,
1337 value
? "set" : "clear");
1338 /* set/clear, then synch memory views with the device */
1341 ep
->dev
->protocol_stall
= 1;
1346 (void) readl (&ep
->regs
->ep_rsp
);
1348 spin_unlock_irqrestore (&ep
->dev
->lock
, flags
);
1354 net2280_fifo_status (struct usb_ep
*_ep
)
1356 struct net2280_ep
*ep
;
1359 ep
= container_of (_ep
, struct net2280_ep
, ep
);
1360 if (!_ep
|| (!ep
->desc
&& ep
->num
!= 0))
1362 if (!ep
->dev
->driver
|| ep
->dev
->gadget
.speed
== USB_SPEED_UNKNOWN
)
1365 avail
= readl (&ep
->regs
->ep_avail
) & ((1 << 12) - 1);
1366 if (avail
> ep
->fifo_size
)
1369 avail
= ep
->fifo_size
- avail
;
1374 net2280_fifo_flush (struct usb_ep
*_ep
)
1376 struct net2280_ep
*ep
;
1378 ep
= container_of (_ep
, struct net2280_ep
, ep
);
1379 if (!_ep
|| (!ep
->desc
&& ep
->num
!= 0))
1381 if (!ep
->dev
->driver
|| ep
->dev
->gadget
.speed
== USB_SPEED_UNKNOWN
)
1384 writel ((1 << FIFO_FLUSH
), &ep
->regs
->ep_stat
);
1385 (void) readl (&ep
->regs
->ep_rsp
);
1388 static const struct usb_ep_ops net2280_ep_ops
= {
1389 .enable
= net2280_enable
,
1390 .disable
= net2280_disable
,
1392 .alloc_request
= net2280_alloc_request
,
1393 .free_request
= net2280_free_request
,
1395 .alloc_buffer
= net2280_alloc_buffer
,
1396 .free_buffer
= net2280_free_buffer
,
1398 .queue
= net2280_queue
,
1399 .dequeue
= net2280_dequeue
,
1401 .set_halt
= net2280_set_halt
,
1402 .fifo_status
= net2280_fifo_status
,
1403 .fifo_flush
= net2280_fifo_flush
,
1406 /*-------------------------------------------------------------------------*/
1408 static int net2280_get_frame (struct usb_gadget
*_gadget
)
1410 struct net2280
*dev
;
1411 unsigned long flags
;
1416 dev
= container_of (_gadget
, struct net2280
, gadget
);
1417 spin_lock_irqsave (&dev
->lock
, flags
);
1418 retval
= get_idx_reg (dev
->regs
, REG_FRAME
) & 0x03ff;
1419 spin_unlock_irqrestore (&dev
->lock
, flags
);
1423 static int net2280_wakeup (struct usb_gadget
*_gadget
)
1425 struct net2280
*dev
;
1427 unsigned long flags
;
1431 dev
= container_of (_gadget
, struct net2280
, gadget
);
1433 spin_lock_irqsave (&dev
->lock
, flags
);
1434 tmp
= readl (&dev
->usb
->usbctl
);
1435 if (tmp
& (1 << DEVICE_REMOTE_WAKEUP_ENABLE
))
1436 writel (1 << GENERATE_RESUME
, &dev
->usb
->usbstat
);
1437 spin_unlock_irqrestore (&dev
->lock
, flags
);
1439 /* pci writes may still be posted */
1443 static int net2280_set_selfpowered (struct usb_gadget
*_gadget
, int value
)
1445 struct net2280
*dev
;
1447 unsigned long flags
;
1451 dev
= container_of (_gadget
, struct net2280
, gadget
);
1453 spin_lock_irqsave (&dev
->lock
, flags
);
1454 tmp
= readl (&dev
->usb
->usbctl
);
1456 tmp
|= (1 << SELF_POWERED_STATUS
);
1458 tmp
&= ~(1 << SELF_POWERED_STATUS
);
1459 writel (tmp
, &dev
->usb
->usbctl
);
1460 spin_unlock_irqrestore (&dev
->lock
, flags
);
1465 static int net2280_pullup(struct usb_gadget
*_gadget
, int is_on
)
1467 struct net2280
*dev
;
1469 unsigned long flags
;
1473 dev
= container_of (_gadget
, struct net2280
, gadget
);
1475 spin_lock_irqsave (&dev
->lock
, flags
);
1476 tmp
= readl (&dev
->usb
->usbctl
);
1477 dev
->softconnect
= (is_on
!= 0);
1479 tmp
|= (1 << USB_DETECT_ENABLE
);
1481 tmp
&= ~(1 << USB_DETECT_ENABLE
);
1482 writel (tmp
, &dev
->usb
->usbctl
);
1483 spin_unlock_irqrestore (&dev
->lock
, flags
);
1488 static const struct usb_gadget_ops net2280_ops
= {
1489 .get_frame
= net2280_get_frame
,
1490 .wakeup
= net2280_wakeup
,
1491 .set_selfpowered
= net2280_set_selfpowered
,
1492 .pullup
= net2280_pullup
,
1495 /*-------------------------------------------------------------------------*/
1497 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1499 /* FIXME move these into procfs, and use seq_file.
1500 * Sysfs _still_ doesn't behave for arbitrarily sized files,
1501 * and also doesn't help products using this with 2.4 kernels.
1504 /* "function" sysfs attribute */
1506 show_function (struct device
*_dev
, struct device_attribute
*attr
, char *buf
)
1508 struct net2280
*dev
= dev_get_drvdata (_dev
);
1511 || !dev
->driver
->function
1512 || strlen (dev
->driver
->function
) > PAGE_SIZE
)
1514 return scnprintf (buf
, PAGE_SIZE
, "%s\n", dev
->driver
->function
);
1516 static DEVICE_ATTR (function
, S_IRUGO
, show_function
, NULL
);
1519 show_registers (struct device
*_dev
, struct device_attribute
*attr
, char *buf
)
1521 struct net2280
*dev
;
1524 unsigned long flags
;
1529 dev
= dev_get_drvdata (_dev
);
1532 spin_lock_irqsave (&dev
->lock
, flags
);
1535 s
= dev
->driver
->driver
.name
;
1539 /* Main Control Registers */
1540 t
= scnprintf (next
, size
, "%s version " DRIVER_VERSION
1541 ", chiprev %04x, dma %s\n\n"
1542 "devinit %03x fifoctl %08x gadget '%s'\n"
1543 "pci irqenb0 %02x irqenb1 %08x "
1544 "irqstat0 %04x irqstat1 %08x\n",
1545 driver_name
, dev
->chiprev
,
1547 ? (use_dma_chaining
? "chaining" : "enabled")
1549 readl (&dev
->regs
->devinit
),
1550 readl (&dev
->regs
->fifoctl
),
1552 readl (&dev
->regs
->pciirqenb0
),
1553 readl (&dev
->regs
->pciirqenb1
),
1554 readl (&dev
->regs
->irqstat0
),
1555 readl (&dev
->regs
->irqstat1
));
1559 /* USB Control Registers */
1560 t1
= readl (&dev
->usb
->usbctl
);
1561 t2
= readl (&dev
->usb
->usbstat
);
1562 if (t1
& (1 << VBUS_PIN
)) {
1563 if (t2
& (1 << HIGH_SPEED
))
1565 else if (dev
->gadget
.speed
== USB_SPEED_UNKNOWN
)
1569 /* full speed bit (6) not working?? */
1572 t
= scnprintf (next
, size
,
1573 "stdrsp %08x usbctl %08x usbstat %08x "
1574 "addr 0x%02x (%s)\n",
1575 readl (&dev
->usb
->stdrsp
), t1
, t2
,
1576 readl (&dev
->usb
->ouraddr
), s
);
1580 /* PCI Master Control Registers */
1582 /* DMA Control Registers */
1584 /* Configurable EP Control Registers */
1585 for (i
= 0; i
< 7; i
++) {
1586 struct net2280_ep
*ep
;
1592 t1
= readl (&ep
->regs
->ep_cfg
);
1593 t2
= readl (&ep
->regs
->ep_rsp
) & 0xff;
1594 t
= scnprintf (next
, size
,
1595 "\n%s\tcfg %05x rsp (%02x) %s%s%s%s%s%s%s%s"
1597 ep
->ep
.name
, t1
, t2
,
1598 (t2
& (1 << CLEAR_NAK_OUT_PACKETS
))
1600 (t2
& (1 << CLEAR_EP_HIDE_STATUS_PHASE
))
1602 (t2
& (1 << CLEAR_EP_FORCE_CRC_ERROR
))
1604 (t2
& (1 << CLEAR_INTERRUPT_MODE
))
1605 ? "interrupt " : "",
1606 (t2
& (1<<CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE
))
1608 (t2
& (1 << CLEAR_NAK_OUT_PACKETS_MODE
))
1610 (t2
& (1 << CLEAR_ENDPOINT_TOGGLE
))
1611 ? "DATA1 " : "DATA0 ",
1612 (t2
& (1 << CLEAR_ENDPOINT_HALT
))
1614 readl (&ep
->regs
->ep_irqenb
));
1618 t
= scnprintf (next
, size
,
1619 "\tstat %08x avail %04x "
1621 readl (&ep
->regs
->ep_stat
),
1622 readl (&ep
->regs
->ep_avail
),
1623 t1
& 0x0f, DIR_STRING (t1
),
1624 type_string (t1
>> 8),
1625 ep
->stopped
? "*" : "");
1632 t
= scnprintf (next
, size
,
1633 " dma\tctl %08x stat %08x count %08x\n"
1634 "\taddr %08x desc %08x\n",
1635 readl (&ep
->dma
->dmactl
),
1636 readl (&ep
->dma
->dmastat
),
1637 readl (&ep
->dma
->dmacount
),
1638 readl (&ep
->dma
->dmaaddr
),
1639 readl (&ep
->dma
->dmadesc
));
1645 /* Indexed Registers */
1649 t
= scnprintf (next
, size
, "\nirqs: ");
1652 for (i
= 0; i
< 7; i
++) {
1653 struct net2280_ep
*ep
;
1658 t
= scnprintf (next
, size
, " %s/%lu", ep
->ep
.name
, ep
->irqs
);
1663 t
= scnprintf (next
, size
, "\n");
1667 spin_unlock_irqrestore (&dev
->lock
, flags
);
1669 return PAGE_SIZE
- size
;
1671 static DEVICE_ATTR (registers
, S_IRUGO
, show_registers
, NULL
);
1674 show_queues (struct device
*_dev
, struct device_attribute
*attr
, char *buf
)
1676 struct net2280
*dev
;
1679 unsigned long flags
;
1682 dev
= dev_get_drvdata (_dev
);
1685 spin_lock_irqsave (&dev
->lock
, flags
);
1687 for (i
= 0; i
< 7; i
++) {
1688 struct net2280_ep
*ep
= &dev
->ep
[i
];
1689 struct net2280_request
*req
;
1693 const struct usb_endpoint_descriptor
*d
;
1698 t
= d
->bEndpointAddress
;
1699 t
= scnprintf (next
, size
,
1700 "\n%s (ep%d%s-%s) max %04x %s fifo %d\n",
1701 ep
->ep
.name
, t
& USB_ENDPOINT_NUMBER_MASK
,
1702 (t
& USB_DIR_IN
) ? "in" : "out",
1704 switch (d
->bmAttributes
& 0x03) {
1705 case USB_ENDPOINT_XFER_BULK
:
1706 val
= "bulk"; break;
1707 case USB_ENDPOINT_XFER_INT
:
1708 val
= "intr"; break;
1712 le16_to_cpu (d
->wMaxPacketSize
) & 0x1fff,
1713 ep
->dma
? "dma" : "pio", ep
->fifo_size
1715 } else /* ep0 should only have one transfer queued */
1716 t
= scnprintf (next
, size
, "ep0 max 64 pio %s\n",
1717 ep
->is_in
? "in" : "out");
1718 if (t
<= 0 || t
> size
)
1723 if (list_empty (&ep
->queue
)) {
1724 t
= scnprintf (next
, size
, "\t(nothing queued)\n");
1725 if (t
<= 0 || t
> size
)
1731 list_for_each_entry (req
, &ep
->queue
, queue
) {
1732 if (ep
->dma
&& req
->td_dma
== readl (&ep
->dma
->dmadesc
))
1733 t
= scnprintf (next
, size
,
1734 "\treq %p len %d/%d "
1735 "buf %p (dmacount %08x)\n",
1736 &req
->req
, req
->req
.actual
,
1737 req
->req
.length
, req
->req
.buf
,
1738 readl (&ep
->dma
->dmacount
));
1740 t
= scnprintf (next
, size
,
1741 "\treq %p len %d/%d buf %p\n",
1742 &req
->req
, req
->req
.actual
,
1743 req
->req
.length
, req
->req
.buf
);
1744 if (t
<= 0 || t
> size
)
1750 struct net2280_dma
*td
;
1753 t
= scnprintf (next
, size
, "\t td %08x "
1754 " count %08x buf %08x desc %08x\n",
1756 le32_to_cpu (td
->dmacount
),
1757 le32_to_cpu (td
->dmaaddr
),
1758 le32_to_cpu (td
->dmadesc
));
1759 if (t
<= 0 || t
> size
)
1768 spin_unlock_irqrestore (&dev
->lock
, flags
);
1769 return PAGE_SIZE
- size
;
1771 static DEVICE_ATTR (queues
, S_IRUGO
, show_queues
, NULL
);
1776 #define device_create_file(a,b) (0)
1777 #define device_remove_file(a,b) do { } while (0)
1781 /*-------------------------------------------------------------------------*/
1783 /* another driver-specific mode might be a request type doing dma
1784 * to/from another device fifo instead of to/from memory.
1787 static void set_fifo_mode (struct net2280
*dev
, int mode
)
1789 /* keeping high bits preserves BAR2 */
1790 writel ((0xffff << PCI_BASE2_RANGE
) | mode
, &dev
->regs
->fifoctl
);
1792 /* always ep-{a,b,e,f} ... maybe not ep-c or ep-d */
1793 INIT_LIST_HEAD (&dev
->gadget
.ep_list
);
1794 list_add_tail (&dev
->ep
[1].ep
.ep_list
, &dev
->gadget
.ep_list
);
1795 list_add_tail (&dev
->ep
[2].ep
.ep_list
, &dev
->gadget
.ep_list
);
1798 list_add_tail (&dev
->ep
[3].ep
.ep_list
, &dev
->gadget
.ep_list
);
1799 list_add_tail (&dev
->ep
[4].ep
.ep_list
, &dev
->gadget
.ep_list
);
1800 dev
->ep
[1].fifo_size
= dev
->ep
[2].fifo_size
= 1024;
1803 dev
->ep
[1].fifo_size
= dev
->ep
[2].fifo_size
= 2048;
1806 list_add_tail (&dev
->ep
[3].ep
.ep_list
, &dev
->gadget
.ep_list
);
1807 dev
->ep
[1].fifo_size
= 2048;
1808 dev
->ep
[2].fifo_size
= 1024;
1811 /* fifo sizes for ep0, ep-c, ep-d, ep-e, and ep-f never change */
1812 list_add_tail (&dev
->ep
[5].ep
.ep_list
, &dev
->gadget
.ep_list
);
1813 list_add_tail (&dev
->ep
[6].ep
.ep_list
, &dev
->gadget
.ep_list
);
1816 /* just declare this in any driver that really need it */
1817 extern int net2280_set_fifo_mode (struct usb_gadget
*gadget
, int mode
);
1820 * net2280_set_fifo_mode - change allocation of fifo buffers
1821 * @gadget: access to the net2280 device that will be updated
1822 * @mode: 0 for default, four 1kB buffers (ep-a through ep-d);
1823 * 1 for two 2kB buffers (ep-a and ep-b only);
1824 * 2 for one 2kB buffer (ep-a) and two 1kB ones (ep-b, ep-c).
1826 * returns zero on success, else negative errno. when this succeeds,
1827 * the contents of gadget->ep_list may have changed.
1829 * you may only call this function when endpoints a-d are all disabled.
1830 * use it whenever extra hardware buffering can help performance, such
1831 * as before enabling "high bandwidth" interrupt endpoints that use
1832 * maxpacket bigger than 512 (when double buffering would otherwise
1835 int net2280_set_fifo_mode (struct usb_gadget
*gadget
, int mode
)
1838 struct net2280
*dev
;
1840 unsigned long flags
;
1844 dev
= container_of (gadget
, struct net2280
, gadget
);
1846 spin_lock_irqsave (&dev
->lock
, flags
);
1848 for (i
= 1; i
<= 4; i
++)
1849 if (dev
->ep
[i
].desc
) {
1853 if (mode
< 0 || mode
> 2)
1856 set_fifo_mode (dev
, mode
);
1857 spin_unlock_irqrestore (&dev
->lock
, flags
);
1861 DEBUG (dev
, "fifo: ep-a 2K, ep-b 2K\n");
1863 DEBUG (dev
, "fifo: ep-a 2K, ep-b 1K, ep-c 1K\n");
1864 /* else all are 1K */
1868 EXPORT_SYMBOL (net2280_set_fifo_mode
);
1870 /*-------------------------------------------------------------------------*/
1872 /* keeping it simple:
1873 * - one bus driver, initted first;
1874 * - one function driver, initted second
1876 * most of the work to support multiple net2280 controllers would
1877 * be to associate this gadget driver (yes?) with all of them, or
1878 * perhaps to bind specific drivers to specific devices.
1881 static struct net2280
*the_controller
;
1883 static void usb_reset (struct net2280
*dev
)
1887 dev
->gadget
.speed
= USB_SPEED_UNKNOWN
;
1888 (void) readl (&dev
->usb
->usbctl
);
1890 net2280_led_init (dev
);
1892 /* disable automatic responses, and irqs */
1893 writel (0, &dev
->usb
->stdrsp
);
1894 writel (0, &dev
->regs
->pciirqenb0
);
1895 writel (0, &dev
->regs
->pciirqenb1
);
1897 /* clear old dma and irq state */
1898 for (tmp
= 0; tmp
< 4; tmp
++) {
1899 struct net2280_ep
*ep
= &dev
->ep
[tmp
+ 1];
1904 writel (~0, &dev
->regs
->irqstat0
),
1905 writel (~(1 << SUSPEND_REQUEST_INTERRUPT
), &dev
->regs
->irqstat1
),
1907 /* reset, and enable pci */
1908 tmp
= readl (&dev
->regs
->devinit
)
1910 | (1 << FIFO_SOFT_RESET
)
1911 | (1 << USB_SOFT_RESET
)
1912 | (1 << M8051_RESET
);
1913 writel (tmp
, &dev
->regs
->devinit
);
1915 /* standard fifo and endpoint allocations */
1916 set_fifo_mode (dev
, (fifo_mode
<= 2) ? fifo_mode
: 0);
1919 static void usb_reinit (struct net2280
*dev
)
1924 /* use_dma changes are ignored till next device re-init */
1927 /* basic endpoint init */
1928 for (tmp
= 0; tmp
< 7; tmp
++) {
1929 struct net2280_ep
*ep
= &dev
->ep
[tmp
];
1931 ep
->ep
.name
= ep_name
[tmp
];
1935 if (tmp
> 0 && tmp
<= 4) {
1936 ep
->fifo_size
= 1024;
1938 ep
->dma
= &dev
->dma
[tmp
- 1];
1941 ep
->regs
= &dev
->epregs
[tmp
];
1942 ep_reset (dev
->regs
, ep
);
1944 dev
->ep
[0].ep
.maxpacket
= 64;
1945 dev
->ep
[5].ep
.maxpacket
= 64;
1946 dev
->ep
[6].ep
.maxpacket
= 64;
1948 dev
->gadget
.ep0
= &dev
->ep
[0].ep
;
1949 dev
->ep
[0].stopped
= 0;
1950 INIT_LIST_HEAD (&dev
->gadget
.ep0
->ep_list
);
1952 /* we want to prevent lowlevel/insecure access from the USB host,
1953 * but erratum 0119 means this enable bit is ignored
1955 for (tmp
= 0; tmp
< 5; tmp
++)
1956 writel (EP_DONTUSE
, &dev
->dep
[tmp
].dep_cfg
);
1959 static void ep0_start (struct net2280
*dev
)
1961 writel ( (1 << CLEAR_EP_HIDE_STATUS_PHASE
)
1962 | (1 << CLEAR_NAK_OUT_PACKETS
)
1963 | (1 << CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE
)
1964 , &dev
->epregs
[0].ep_rsp
);
1967 * hardware optionally handles a bunch of standard requests
1968 * that the API hides from drivers anyway. have it do so.
1969 * endpoint status/features are handled in software, to
1970 * help pass tests for some dubious behavior.
1972 writel ( (1 << SET_TEST_MODE
)
1973 | (1 << SET_ADDRESS
)
1974 | (1 << DEVICE_SET_CLEAR_DEVICE_REMOTE_WAKEUP
)
1975 | (1 << GET_DEVICE_STATUS
)
1976 | (1 << GET_INTERFACE_STATUS
)
1977 , &dev
->usb
->stdrsp
);
1978 writel ( (1 << USB_ROOT_PORT_WAKEUP_ENABLE
)
1979 | (1 << SELF_POWERED_USB_DEVICE
)
1980 | (1 << REMOTE_WAKEUP_SUPPORT
)
1981 | (dev
->softconnect
<< USB_DETECT_ENABLE
)
1982 | (1 << SELF_POWERED_STATUS
)
1983 , &dev
->usb
->usbctl
);
1985 /* enable irqs so we can see ep0 and general operation */
1986 writel ( (1 << SETUP_PACKET_INTERRUPT_ENABLE
)
1987 | (1 << ENDPOINT_0_INTERRUPT_ENABLE
)
1988 , &dev
->regs
->pciirqenb0
);
1989 writel ( (1 << PCI_INTERRUPT_ENABLE
)
1990 | (1 << PCI_MASTER_ABORT_RECEIVED_INTERRUPT_ENABLE
)
1991 | (1 << PCI_TARGET_ABORT_RECEIVED_INTERRUPT_ENABLE
)
1992 | (1 << PCI_RETRY_ABORT_INTERRUPT_ENABLE
)
1993 | (1 << VBUS_INTERRUPT_ENABLE
)
1994 | (1 << ROOT_PORT_RESET_INTERRUPT_ENABLE
)
1995 | (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE
)
1996 , &dev
->regs
->pciirqenb1
);
1998 /* don't leave any writes posted */
1999 (void) readl (&dev
->usb
->usbctl
);
2002 /* when a driver is successfully registered, it will receive
2003 * control requests including set_configuration(), which enables
2004 * non-control requests. then usb traffic follows until a
2005 * disconnect is reported. then a host may connect again, or
2006 * the driver might get unbound.
2008 int usb_gadget_register_driver (struct usb_gadget_driver
*driver
)
2010 struct net2280
*dev
= the_controller
;
2014 /* insist on high speed support from the driver, since
2015 * (dev->usb->xcvrdiag & FORCE_FULL_SPEED_MODE)
2016 * "must not be used in normal operation"
2019 || driver
->speed
!= USB_SPEED_HIGH
2028 for (i
= 0; i
< 7; i
++)
2029 dev
->ep
[i
].irqs
= 0;
2031 /* hook up the driver ... */
2032 dev
->softconnect
= 1;
2033 driver
->driver
.bus
= NULL
;
2034 dev
->driver
= driver
;
2035 dev
->gadget
.dev
.driver
= &driver
->driver
;
2036 retval
= driver
->bind (&dev
->gadget
);
2038 DEBUG (dev
, "bind to driver %s --> %d\n",
2039 driver
->driver
.name
, retval
);
2041 dev
->gadget
.dev
.driver
= NULL
;
2045 retval
= device_create_file (&dev
->pdev
->dev
, &dev_attr_function
);
2046 if (retval
) goto err_unbind
;
2047 retval
= device_create_file (&dev
->pdev
->dev
, &dev_attr_queues
);
2048 if (retval
) goto err_func
;
2050 /* ... then enable host detection and ep0; and we're ready
2051 * for set_configuration as well as eventual disconnect.
2053 net2280_led_active (dev
, 1);
2056 DEBUG (dev
, "%s ready, usbctl %08x stdrsp %08x\n",
2057 driver
->driver
.name
,
2058 readl (&dev
->usb
->usbctl
),
2059 readl (&dev
->usb
->stdrsp
));
2061 /* pci writes may still be posted */
2065 device_remove_file (&dev
->pdev
->dev
, &dev_attr_function
);
2067 driver
->unbind (&dev
->gadget
);
2068 dev
->gadget
.dev
.driver
= NULL
;
2072 EXPORT_SYMBOL (usb_gadget_register_driver
);
2075 stop_activity (struct net2280
*dev
, struct usb_gadget_driver
*driver
)
2079 /* don't disconnect if it's not connected */
2080 if (dev
->gadget
.speed
== USB_SPEED_UNKNOWN
)
2083 /* stop hardware; prevent new request submissions;
2084 * and kill any outstanding requests.
2087 for (i
= 0; i
< 7; i
++)
2088 nuke (&dev
->ep
[i
]);
2090 /* report disconnect; the driver is already quiesced */
2092 spin_unlock (&dev
->lock
);
2093 driver
->disconnect (&dev
->gadget
);
2094 spin_lock (&dev
->lock
);
2100 int usb_gadget_unregister_driver (struct usb_gadget_driver
*driver
)
2102 struct net2280
*dev
= the_controller
;
2103 unsigned long flags
;
2107 if (!driver
|| driver
!= dev
->driver
|| !driver
->unbind
)
2110 spin_lock_irqsave (&dev
->lock
, flags
);
2111 stop_activity (dev
, driver
);
2112 spin_unlock_irqrestore (&dev
->lock
, flags
);
2114 net2280_pullup (&dev
->gadget
, 0);
2116 driver
->unbind (&dev
->gadget
);
2117 dev
->gadget
.dev
.driver
= NULL
;
2120 net2280_led_active (dev
, 0);
2121 device_remove_file (&dev
->pdev
->dev
, &dev_attr_function
);
2122 device_remove_file (&dev
->pdev
->dev
, &dev_attr_queues
);
2124 DEBUG (dev
, "unregistered driver '%s'\n", driver
->driver
.name
);
2127 EXPORT_SYMBOL (usb_gadget_unregister_driver
);
2130 /*-------------------------------------------------------------------------*/
2132 /* handle ep0, ep-e, ep-f with 64 byte packets: packet per irq.
2133 * also works for dma-capable endpoints, in pio mode or just
2134 * to manually advance the queue after short OUT transfers.
2136 static void handle_ep_small (struct net2280_ep
*ep
)
2138 struct net2280_request
*req
;
2140 /* 0 error, 1 mid-data, 2 done */
2143 if (!list_empty (&ep
->queue
))
2144 req
= list_entry (ep
->queue
.next
,
2145 struct net2280_request
, queue
);
2149 /* ack all, and handle what we care about */
2150 t
= readl (&ep
->regs
->ep_stat
);
2153 VDEBUG (ep
->dev
, "%s ack ep_stat %08x, req %p\n",
2154 ep
->ep
.name
, t
, req
? &req
->req
: 0);
2156 if (!ep
->is_in
|| ep
->dev
->pdev
->device
== 0x2280)
2157 writel (t
& ~(1 << NAK_OUT_PACKETS
), &ep
->regs
->ep_stat
);
2159 /* Added for 2282 */
2160 writel (t
, &ep
->regs
->ep_stat
);
2162 /* for ep0, monitor token irqs to catch data stage length errors
2163 * and to synchronize on status.
2165 * also, to defer reporting of protocol stalls ... here's where
2166 * data or status first appears, handling stalls here should never
2167 * cause trouble on the host side..
2169 * control requests could be slightly faster without token synch for
2170 * status, but status can jam up that way.
2172 if (unlikely (ep
->num
== 0)) {
2174 /* status; stop NAKing */
2175 if (t
& (1 << DATA_OUT_PING_TOKEN_INTERRUPT
)) {
2176 if (ep
->dev
->protocol_stall
) {
2183 /* reply to extra IN data tokens with a zlp */
2184 } else if (t
& (1 << DATA_IN_TOKEN_INTERRUPT
)) {
2185 if (ep
->dev
->protocol_stall
) {
2189 } else if (ep
->responded
&&
2190 !req
&& !ep
->stopped
)
2191 write_fifo (ep
, NULL
);
2194 /* status; stop NAKing */
2195 if (t
& (1 << DATA_IN_TOKEN_INTERRUPT
)) {
2196 if (ep
->dev
->protocol_stall
) {
2201 /* an extra OUT token is an error */
2202 } else if (((t
& (1 << DATA_OUT_PING_TOKEN_INTERRUPT
))
2204 && req
->req
.actual
== req
->req
.length
)
2205 || (ep
->responded
&& !req
)) {
2206 ep
->dev
->protocol_stall
= 1;
2210 done (ep
, req
, -EOVERFLOW
);
2216 if (unlikely (!req
))
2219 /* manual DMA queue advance after short OUT */
2220 if (likely (ep
->dma
!= 0)) {
2221 if (t
& (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT
)) {
2223 int stopped
= ep
->stopped
;
2225 /* TRANSFERRED works around OUT_DONE erratum 0112.
2226 * we expect (N <= maxpacket) bytes; host wrote M.
2227 * iff (M < N) we won't ever see a DMA interrupt.
2230 for (count
= 0; ; t
= readl (&ep
->regs
->ep_stat
)) {
2232 /* any preceding dma transfers must finish.
2233 * dma handles (M >= N), may empty the queue
2235 scan_dma_completions (ep
);
2236 if (unlikely (list_empty (&ep
->queue
)
2237 || ep
->out_overflow
)) {
2241 req
= list_entry (ep
->queue
.next
,
2242 struct net2280_request
, queue
);
2244 /* here either (M < N), a "real" short rx;
2245 * or (M == N) and the queue didn't empty
2247 if (likely (t
& (1 << FIFO_EMPTY
))) {
2248 count
= readl (&ep
->dma
->dmacount
);
2249 count
&= DMA_BYTE_COUNT_MASK
;
2250 if (readl (&ep
->dma
->dmadesc
)
2258 /* stop DMA, leave ep NAKing */
2259 writel ((1 << DMA_ABORT
), &ep
->dma
->dmastat
);
2260 spin_stop_dma (ep
->dma
);
2263 req
->td
->dmacount
= 0;
2264 t
= readl (&ep
->regs
->ep_avail
);
2265 dma_done (ep
, req
, count
,
2266 (ep
->out_overflow
|| t
)
2270 /* also flush to prevent erratum 0106 trouble */
2271 if (unlikely (ep
->out_overflow
2272 || (ep
->dev
->chiprev
== 0x0100
2273 && ep
->dev
->gadget
.speed
2274 == USB_SPEED_FULL
))) {
2276 ep
->out_overflow
= 0;
2279 /* (re)start dma if needed, stop NAKing */
2280 ep
->stopped
= stopped
;
2281 if (!list_empty (&ep
->queue
))
2284 DEBUG (ep
->dev
, "%s dma ep_stat %08x ??\n",
2288 /* data packet(s) received (in the fifo, OUT) */
2289 } else if (t
& (1 << DATA_PACKET_RECEIVED_INTERRUPT
)) {
2290 if (read_fifo (ep
, req
) && ep
->num
!= 0)
2293 /* data packet(s) transmitted (IN) */
2294 } else if (t
& (1 << DATA_PACKET_TRANSMITTED_INTERRUPT
)) {
2297 len
= req
->req
.length
- req
->req
.actual
;
2298 if (len
> ep
->ep
.maxpacket
)
2299 len
= ep
->ep
.maxpacket
;
2300 req
->req
.actual
+= len
;
2302 /* if we wrote it all, we're usually done */
2303 if (req
->req
.actual
== req
->req
.length
) {
2305 /* send zlps until the status stage */
2306 } else if (!req
->req
.zero
|| len
!= ep
->ep
.maxpacket
)
2310 /* there was nothing to do ... */
2311 } else if (mode
== 1)
2316 /* stream endpoints often resubmit/unlink in completion */
2319 /* maybe advance queue to next request */
2321 /* NOTE: net2280 could let gadget driver start the
2322 * status stage later. since not all controllers let
2323 * them control that, the api doesn't (yet) allow it.
2329 if (!list_empty (&ep
->queue
) && !ep
->stopped
)
2330 req
= list_entry (ep
->queue
.next
,
2331 struct net2280_request
, queue
);
2334 if (req
&& !ep
->is_in
)
2335 stop_out_naking (ep
);
2339 /* is there a buffer for the next packet?
2340 * for best streaming performance, make sure there is one.
2342 if (req
&& !ep
->stopped
) {
2344 /* load IN fifo with next packet (may be zlp) */
2345 if (t
& (1 << DATA_PACKET_TRANSMITTED_INTERRUPT
))
2346 write_fifo (ep
, &req
->req
);
2350 static struct net2280_ep
*
2351 get_ep_by_addr (struct net2280
*dev
, u16 wIndex
)
2353 struct net2280_ep
*ep
;
2355 if ((wIndex
& USB_ENDPOINT_NUMBER_MASK
) == 0)
2356 return &dev
->ep
[0];
2357 list_for_each_entry (ep
, &dev
->gadget
.ep_list
, ep
.ep_list
) {
2358 u8 bEndpointAddress
;
2362 bEndpointAddress
= ep
->desc
->bEndpointAddress
;
2363 if ((wIndex
^ bEndpointAddress
) & USB_DIR_IN
)
2365 if ((wIndex
& 0x0f) == (bEndpointAddress
& 0x0f))
2371 static void handle_stat0_irqs (struct net2280
*dev
, u32 stat
)
2373 struct net2280_ep
*ep
;
2376 /* most of these don't need individual acks */
2377 stat
&= ~(1 << INTA_ASSERTED
);
2380 // DEBUG (dev, "irqstat0 %04x\n", stat);
2382 /* starting a control request? */
2383 if (unlikely (stat
& (1 << SETUP_PACKET_INTERRUPT
))) {
2386 struct usb_ctrlrequest r
;
2389 struct net2280_request
*req
;
2391 if (dev
->gadget
.speed
== USB_SPEED_UNKNOWN
) {
2392 if (readl (&dev
->usb
->usbstat
) & (1 << HIGH_SPEED
))
2393 dev
->gadget
.speed
= USB_SPEED_HIGH
;
2395 dev
->gadget
.speed
= USB_SPEED_FULL
;
2396 net2280_led_speed (dev
, dev
->gadget
.speed
);
2397 DEBUG (dev
, "%s speed\n",
2398 (dev
->gadget
.speed
== USB_SPEED_HIGH
)
2405 /* make sure any leftover request state is cleared */
2406 stat
&= ~(1 << ENDPOINT_0_INTERRUPT
);
2407 while (!list_empty (&ep
->queue
)) {
2408 req
= list_entry (ep
->queue
.next
,
2409 struct net2280_request
, queue
);
2410 done (ep
, req
, (req
->req
.actual
== req
->req
.length
)
2414 dev
->protocol_stall
= 0;
2416 if (ep
->dev
->pdev
->device
== 0x2280)
2417 tmp
= (1 << FIFO_OVERFLOW
)
2418 | (1 << FIFO_UNDERFLOW
);
2422 writel (tmp
| (1 << TIMEOUT
)
2423 | (1 << USB_STALL_SENT
)
2424 | (1 << USB_IN_NAK_SENT
)
2425 | (1 << USB_IN_ACK_RCVD
)
2426 | (1 << USB_OUT_PING_NAK_SENT
)
2427 | (1 << USB_OUT_ACK_SENT
)
2428 | (1 << SHORT_PACKET_OUT_DONE_INTERRUPT
)
2429 | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT
)
2430 | (1 << DATA_PACKET_RECEIVED_INTERRUPT
)
2431 | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT
)
2432 | (1 << DATA_OUT_PING_TOKEN_INTERRUPT
)
2433 | (1 << DATA_IN_TOKEN_INTERRUPT
)
2434 , &ep
->regs
->ep_stat
);
2435 u
.raw
[0] = readl (&dev
->usb
->setup0123
);
2436 u
.raw
[1] = readl (&dev
->usb
->setup4567
);
2438 cpu_to_le32s (&u
.raw
[0]);
2439 cpu_to_le32s (&u
.raw
[1]);
2443 #define w_value le16_to_cpu(u.r.wValue)
2444 #define w_index le16_to_cpu(u.r.wIndex)
2445 #define w_length le16_to_cpu(u.r.wLength)
2448 writel (1 << SETUP_PACKET_INTERRUPT
, &dev
->regs
->irqstat0
);
2449 stat
^= (1 << SETUP_PACKET_INTERRUPT
);
2451 /* watch control traffic at the token level, and force
2452 * synchronization before letting the status stage happen.
2453 * FIXME ignore tokens we'll NAK, until driver responds.
2454 * that'll mean a lot less irqs for some drivers.
2456 ep
->is_in
= (u
.r
.bRequestType
& USB_DIR_IN
) != 0;
2458 scratch
= (1 << DATA_PACKET_TRANSMITTED_INTERRUPT
)
2459 | (1 << DATA_OUT_PING_TOKEN_INTERRUPT
)
2460 | (1 << DATA_IN_TOKEN_INTERRUPT
);
2461 stop_out_naking (ep
);
2463 scratch
= (1 << DATA_PACKET_RECEIVED_INTERRUPT
)
2464 | (1 << DATA_OUT_PING_TOKEN_INTERRUPT
)
2465 | (1 << DATA_IN_TOKEN_INTERRUPT
);
2466 writel (scratch
, &dev
->epregs
[0].ep_irqenb
);
2468 /* we made the hardware handle most lowlevel requests;
2469 * everything else goes uplevel to the gadget code.
2472 switch (u
.r
.bRequest
) {
2473 case USB_REQ_GET_STATUS
: {
2474 struct net2280_ep
*e
;
2477 /* hw handles device and interface status */
2478 if (u
.r
.bRequestType
!= (USB_DIR_IN
|USB_RECIP_ENDPOINT
))
2480 if ((e
= get_ep_by_addr (dev
, w_index
)) == 0
2484 if (readl (&e
->regs
->ep_rsp
)
2485 & (1 << SET_ENDPOINT_HALT
))
2486 status
= __constant_cpu_to_le32 (1);
2488 status
= __constant_cpu_to_le32 (0);
2490 /* don't bother with a request object! */
2491 writel (0, &dev
->epregs
[0].ep_irqenb
);
2492 set_fifo_bytecount (ep
, w_length
);
2493 writel ((__force u32
)status
, &dev
->epregs
[0].ep_data
);
2495 VDEBUG (dev
, "%s stat %02x\n", ep
->ep
.name
, status
);
2496 goto next_endpoints
;
2499 case USB_REQ_CLEAR_FEATURE
: {
2500 struct net2280_ep
*e
;
2502 /* hw handles device features */
2503 if (u
.r
.bRequestType
!= USB_RECIP_ENDPOINT
)
2505 if (w_value
!= USB_ENDPOINT_HALT
2508 if ((e
= get_ep_by_addr (dev
, w_index
)) == 0)
2512 VDEBUG (dev
, "%s clear halt\n", ep
->ep
.name
);
2513 goto next_endpoints
;
2516 case USB_REQ_SET_FEATURE
: {
2517 struct net2280_ep
*e
;
2519 /* hw handles device features */
2520 if (u
.r
.bRequestType
!= USB_RECIP_ENDPOINT
)
2522 if (w_value
!= USB_ENDPOINT_HALT
2525 if ((e
= get_ep_by_addr (dev
, w_index
)) == 0)
2529 VDEBUG (dev
, "%s set halt\n", ep
->ep
.name
);
2530 goto next_endpoints
;
2535 VDEBUG (dev
, "setup %02x.%02x v%04x i%04x l%04x"
2537 u
.r
.bRequestType
, u
.r
.bRequest
,
2538 w_value
, w_index
, w_length
,
2539 readl (&ep
->regs
->ep_cfg
));
2541 spin_unlock (&dev
->lock
);
2542 tmp
= dev
->driver
->setup (&dev
->gadget
, &u
.r
);
2543 spin_lock (&dev
->lock
);
2546 /* stall ep0 on error */
2549 VDEBUG (dev
, "req %02x.%02x protocol STALL; stat %d\n",
2550 u
.r
.bRequestType
, u
.r
.bRequest
, tmp
);
2551 dev
->protocol_stall
= 1;
2554 /* some in/out token irq should follow; maybe stall then.
2555 * driver must queue a request (even zlp) or halt ep0
2556 * before the host times out.
2565 /* endpoint data irq ? */
2566 scratch
= stat
& 0x7f;
2568 for (num
= 0; scratch
; num
++) {
2571 /* do this endpoint's FIFO and queue need tending? */
2573 if ((scratch
& t
) == 0)
2577 ep
= &dev
->ep
[num
];
2578 handle_ep_small (ep
);
2582 DEBUG (dev
, "unhandled irqstat0 %08x\n", stat
);
2585 #define DMA_INTERRUPTS ( \
2586 (1 << DMA_D_INTERRUPT) \
2587 | (1 << DMA_C_INTERRUPT) \
2588 | (1 << DMA_B_INTERRUPT) \
2589 | (1 << DMA_A_INTERRUPT))
2590 #define PCI_ERROR_INTERRUPTS ( \
2591 (1 << PCI_MASTER_ABORT_RECEIVED_INTERRUPT) \
2592 | (1 << PCI_TARGET_ABORT_RECEIVED_INTERRUPT) \
2593 | (1 << PCI_RETRY_ABORT_INTERRUPT))
2595 static void handle_stat1_irqs (struct net2280
*dev
, u32 stat
)
2597 struct net2280_ep
*ep
;
2598 u32 tmp
, num
, mask
, scratch
;
2600 /* after disconnect there's nothing else to do! */
2601 tmp
= (1 << VBUS_INTERRUPT
) | (1 << ROOT_PORT_RESET_INTERRUPT
);
2602 mask
= (1 << HIGH_SPEED
) | (1 << FULL_SPEED
);
2604 /* VBUS disconnect is indicated by VBUS_PIN and VBUS_INTERRUPT set.
2605 * Root Port Reset is indicated by ROOT_PORT_RESET_INTERRRUPT set and
2606 * both HIGH_SPEED and FULL_SPEED clear (as ROOT_PORT_RESET_INTERRUPT
2607 * only indicates a change in the reset state).
2610 writel (tmp
, &dev
->regs
->irqstat1
);
2611 if ((((stat
& (1 << ROOT_PORT_RESET_INTERRUPT
))
2612 && ((readl (&dev
->usb
->usbstat
) & mask
)
2614 || ((readl (&dev
->usb
->usbctl
)
2615 & (1 << VBUS_PIN
)) == 0)
2616 ) && ( dev
->gadget
.speed
!= USB_SPEED_UNKNOWN
)) {
2617 DEBUG (dev
, "disconnect %s\n",
2618 dev
->driver
->driver
.name
);
2619 stop_activity (dev
, dev
->driver
);
2625 /* vBUS can bounce ... one of many reasons to ignore the
2626 * notion of hotplug events on bus connect/disconnect!
2632 /* NOTE: chip stays in PCI D0 state for now, but it could
2633 * enter D1 to save more power
2635 tmp
= (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT
);
2637 writel (tmp
, &dev
->regs
->irqstat1
);
2638 if (stat
& (1 << SUSPEND_REQUEST_INTERRUPT
)) {
2639 if (dev
->driver
->suspend
)
2640 dev
->driver
->suspend (&dev
->gadget
);
2641 if (!enable_suspend
)
2642 stat
&= ~(1 << SUSPEND_REQUEST_INTERRUPT
);
2644 if (dev
->driver
->resume
)
2645 dev
->driver
->resume (&dev
->gadget
);
2646 /* at high speed, note erratum 0133 */
2651 /* clear any other status/irqs */
2653 writel (stat
, &dev
->regs
->irqstat1
);
2655 /* some status we can just ignore */
2656 if (dev
->pdev
->device
== 0x2280)
2657 stat
&= ~((1 << CONTROL_STATUS_INTERRUPT
)
2658 | (1 << SUSPEND_REQUEST_INTERRUPT
)
2659 | (1 << RESUME_INTERRUPT
)
2660 | (1 << SOF_INTERRUPT
));
2662 stat
&= ~((1 << CONTROL_STATUS_INTERRUPT
)
2663 | (1 << RESUME_INTERRUPT
)
2664 | (1 << SOF_DOWN_INTERRUPT
)
2665 | (1 << SOF_INTERRUPT
));
2669 // DEBUG (dev, "irqstat1 %08x\n", stat);
2671 /* DMA status, for ep-{a,b,c,d} */
2672 scratch
= stat
& DMA_INTERRUPTS
;
2673 stat
&= ~DMA_INTERRUPTS
;
2675 for (num
= 0; scratch
; num
++) {
2676 struct net2280_dma_regs __iomem
*dma
;
2679 if ((tmp
& scratch
) == 0)
2683 ep
= &dev
->ep
[num
+ 1];
2689 /* clear ep's dma status */
2690 tmp
= readl (&dma
->dmastat
);
2691 writel (tmp
, &dma
->dmastat
);
2693 /* chaining should stop on abort, short OUT from fifo,
2694 * or (stat0 codepath) short OUT transfer.
2696 if (!use_dma_chaining
) {
2697 if ((tmp
& (1 << DMA_TRANSACTION_DONE_INTERRUPT
))
2699 DEBUG (ep
->dev
, "%s no xact done? %08x\n",
2706 /* OUT transfers terminate when the data from the
2707 * host is in our memory. Process whatever's done.
2708 * On this path, we know transfer's last packet wasn't
2709 * less than req->length. NAK_OUT_PACKETS may be set,
2710 * or the FIFO may already be holding new packets.
2712 * IN transfers can linger in the FIFO for a very
2713 * long time ... we ignore that for now, accounting
2714 * precisely (like PIO does) needs per-packet irqs
2716 scan_dma_completions (ep
);
2718 /* disable dma on inactive queues; else maybe restart */
2719 if (list_empty (&ep
->queue
)) {
2720 if (use_dma_chaining
)
2723 tmp
= readl (&dma
->dmactl
);
2724 if (!use_dma_chaining
2725 || (tmp
& (1 << DMA_ENABLE
)) == 0)
2727 else if (ep
->is_in
&& use_dma_chaining
) {
2728 struct net2280_request
*req
;
2731 /* the descriptor at the head of the chain
2732 * may still have VALID_BIT clear; that's
2733 * used to trigger changing DMA_FIFO_VALIDATE
2734 * (affects automagic zlp writes).
2736 req
= list_entry (ep
->queue
.next
,
2737 struct net2280_request
, queue
);
2738 dmacount
= req
->td
->dmacount
;
2739 dmacount
&= __constant_cpu_to_le32 (
2741 | DMA_BYTE_COUNT_MASK
);
2742 if (dmacount
&& (dmacount
& valid_bit
) == 0)
2749 /* NOTE: there are other PCI errors we might usefully notice.
2750 * if they appear very often, here's where to try recovering.
2752 if (stat
& PCI_ERROR_INTERRUPTS
) {
2753 ERROR (dev
, "pci dma error; stat %08x\n", stat
);
2754 stat
&= ~PCI_ERROR_INTERRUPTS
;
2755 /* these are fatal errors, but "maybe" they won't
2758 stop_activity (dev
, dev
->driver
);
2764 DEBUG (dev
, "unhandled irqstat1 %08x\n", stat
);
2767 static irqreturn_t
net2280_irq (int irq
, void *_dev
)
2769 struct net2280
*dev
= _dev
;
2771 /* shared interrupt, not ours */
2772 if (!(readl(&dev
->regs
->irqstat0
) & (1 << INTA_ASSERTED
)))
2775 spin_lock (&dev
->lock
);
2777 /* handle disconnect, dma, and more */
2778 handle_stat1_irqs (dev
, readl (&dev
->regs
->irqstat1
));
2780 /* control requests and PIO */
2781 handle_stat0_irqs (dev
, readl (&dev
->regs
->irqstat0
));
2783 spin_unlock (&dev
->lock
);
2788 /*-------------------------------------------------------------------------*/
2790 static void gadget_release (struct device
*_dev
)
2792 struct net2280
*dev
= dev_get_drvdata (_dev
);
2797 /* tear down the binding between this driver and the pci device */
2799 static void net2280_remove (struct pci_dev
*pdev
)
2801 struct net2280
*dev
= pci_get_drvdata (pdev
);
2803 BUG_ON(dev
->driver
);
2805 /* then clean up the resources we allocated during probe() */
2806 net2280_led_shutdown (dev
);
2807 if (dev
->requests
) {
2809 for (i
= 1; i
< 5; i
++) {
2810 if (!dev
->ep
[i
].dummy
)
2812 pci_pool_free (dev
->requests
, dev
->ep
[i
].dummy
,
2813 dev
->ep
[i
].td_dma
);
2815 pci_pool_destroy (dev
->requests
);
2818 free_irq (pdev
->irq
, dev
);
2820 iounmap (dev
->regs
);
2822 release_mem_region (pci_resource_start (pdev
, 0),
2823 pci_resource_len (pdev
, 0));
2825 pci_disable_device (pdev
);
2826 device_unregister (&dev
->gadget
.dev
);
2827 device_remove_file (&pdev
->dev
, &dev_attr_registers
);
2828 pci_set_drvdata (pdev
, NULL
);
2830 INFO (dev
, "unbind\n");
2832 the_controller
= NULL
;
2835 /* wrap this driver around the specified device, but
2836 * don't respond over USB until a gadget driver binds to us.
2839 static int net2280_probe (struct pci_dev
*pdev
, const struct pci_device_id
*id
)
2841 struct net2280
*dev
;
2842 unsigned long resource
, len
;
2843 void __iomem
*base
= NULL
;
2846 /* if you want to support more than one controller in a system,
2847 * usb_gadget_driver_{register,unregister}() must change.
2849 if (the_controller
) {
2850 dev_warn (&pdev
->dev
, "ignoring\n");
2854 /* alloc, and start init */
2855 dev
= kzalloc (sizeof *dev
, GFP_KERNEL
);
2861 pci_set_drvdata (pdev
, dev
);
2862 spin_lock_init (&dev
->lock
);
2864 dev
->gadget
.ops
= &net2280_ops
;
2865 dev
->gadget
.is_dualspeed
= 1;
2867 /* the "gadget" abstracts/virtualizes the controller */
2868 strcpy (dev
->gadget
.dev
.bus_id
, "gadget");
2869 dev
->gadget
.dev
.parent
= &pdev
->dev
;
2870 dev
->gadget
.dev
.dma_mask
= pdev
->dev
.dma_mask
;
2871 dev
->gadget
.dev
.release
= gadget_release
;
2872 dev
->gadget
.name
= driver_name
;
2874 /* now all the pci goodies ... */
2875 if (pci_enable_device (pdev
) < 0) {
2881 /* BAR 0 holds all the registers
2882 * BAR 1 is 8051 memory; unused here (note erratum 0103)
2883 * BAR 2 is fifo memory; unused here
2885 resource
= pci_resource_start (pdev
, 0);
2886 len
= pci_resource_len (pdev
, 0);
2887 if (!request_mem_region (resource
, len
, driver_name
)) {
2888 DEBUG (dev
, "controller already in use\n");
2894 /* FIXME provide firmware download interface to put
2895 * 8051 code into the chip, e.g. to turn on PCI PM.
2898 base
= ioremap_nocache (resource
, len
);
2900 DEBUG (dev
, "can't map memory\n");
2904 dev
->regs
= (struct net2280_regs __iomem
*) base
;
2905 dev
->usb
= (struct net2280_usb_regs __iomem
*) (base
+ 0x0080);
2906 dev
->pci
= (struct net2280_pci_regs __iomem
*) (base
+ 0x0100);
2907 dev
->dma
= (struct net2280_dma_regs __iomem
*) (base
+ 0x0180);
2908 dev
->dep
= (struct net2280_dep_regs __iomem
*) (base
+ 0x0200);
2909 dev
->epregs
= (struct net2280_ep_regs __iomem
*) (base
+ 0x0300);
2911 /* put into initial config, link up all endpoints */
2912 writel (0, &dev
->usb
->usbctl
);
2916 /* irq setup after old hardware is cleaned up */
2918 ERROR (dev
, "No IRQ. Check PCI setup!\n");
2923 if (request_irq (pdev
->irq
, net2280_irq
, IRQF_SHARED
, driver_name
, dev
)
2925 ERROR (dev
, "request interrupt %d failed\n", pdev
->irq
);
2932 /* NOTE: we know only the 32 LSBs of dma addresses may be nonzero */
2933 dev
->requests
= pci_pool_create ("requests", pdev
,
2934 sizeof (struct net2280_dma
),
2935 0 /* no alignment requirements */,
2936 0 /* or page-crossing issues */);
2937 if (!dev
->requests
) {
2938 DEBUG (dev
, "can't get request pool\n");
2942 for (i
= 1; i
< 5; i
++) {
2943 struct net2280_dma
*td
;
2945 td
= pci_pool_alloc (dev
->requests
, GFP_KERNEL
,
2946 &dev
->ep
[i
].td_dma
);
2948 DEBUG (dev
, "can't get dummy %d\n", i
);
2952 td
->dmacount
= 0; /* not VALID */
2953 td
->dmaaddr
= __constant_cpu_to_le32 (DMA_ADDR_INVALID
);
2954 td
->dmadesc
= td
->dmaaddr
;
2955 dev
->ep
[i
].dummy
= td
;
2958 /* enable lower-overhead pci memory bursts during DMA */
2959 writel ( (1 << DMA_MEMORY_WRITE_AND_INVALIDATE_ENABLE
)
2960 // 256 write retries may not be enough...
2961 // | (1 << PCI_RETRY_ABORT_ENABLE)
2962 | (1 << DMA_READ_MULTIPLE_ENABLE
)
2963 | (1 << DMA_READ_LINE_ENABLE
)
2964 , &dev
->pci
->pcimstctl
);
2965 /* erratum 0115 shouldn't appear: Linux inits PCI_LATENCY_TIMER */
2966 pci_set_master (pdev
);
2967 pci_try_set_mwi (pdev
);
2969 /* ... also flushes any posted pci writes */
2970 dev
->chiprev
= get_idx_reg (dev
->regs
, REG_CHIPREV
) & 0xffff;
2973 INFO (dev
, "%s\n", driver_desc
);
2974 INFO (dev
, "irq %d, pci mem %p, chip rev %04x\n",
2975 pdev
->irq
, base
, dev
->chiprev
);
2976 INFO (dev
, "version: " DRIVER_VERSION
"; dma %s\n",
2978 ? (use_dma_chaining
? "chaining" : "enabled")
2980 the_controller
= dev
;
2982 retval
= device_register (&dev
->gadget
.dev
);
2983 if (retval
) goto done
;
2984 retval
= device_create_file (&pdev
->dev
, &dev_attr_registers
);
2985 if (retval
) goto done
;
2991 net2280_remove (pdev
);
2995 /* make sure the board is quiescent; otherwise it will continue
2996 * generating IRQs across the upcoming reboot.
2999 static void net2280_shutdown (struct pci_dev
*pdev
)
3001 struct net2280
*dev
= pci_get_drvdata (pdev
);
3004 writel (0, &dev
->regs
->pciirqenb0
);
3005 writel (0, &dev
->regs
->pciirqenb1
);
3007 /* disable the pullup so the host will think we're gone */
3008 writel (0, &dev
->usb
->usbctl
);
3012 /*-------------------------------------------------------------------------*/
3014 static const struct pci_device_id pci_ids
[] = { {
3015 .class = ((PCI_CLASS_SERIAL_USB
<< 8) | 0xfe),
3019 .subvendor
= PCI_ANY_ID
,
3020 .subdevice
= PCI_ANY_ID
,
3022 .class = ((PCI_CLASS_SERIAL_USB
<< 8) | 0xfe),
3026 .subvendor
= PCI_ANY_ID
,
3027 .subdevice
= PCI_ANY_ID
,
3029 }, { /* end: all zeroes */ }
3031 MODULE_DEVICE_TABLE (pci
, pci_ids
);
3033 /* pci driver glue; this is a "new style" PCI driver module */
3034 static struct pci_driver net2280_pci_driver
= {
3035 .name
= (char *) driver_name
,
3036 .id_table
= pci_ids
,
3038 .probe
= net2280_probe
,
3039 .remove
= net2280_remove
,
3040 .shutdown
= net2280_shutdown
,
3042 /* FIXME add power management support */
3045 MODULE_DESCRIPTION (DRIVER_DESC
);
3046 MODULE_AUTHOR ("David Brownell");
3047 MODULE_LICENSE ("GPL");
3049 static int __init
init (void)
3052 use_dma_chaining
= 0;
3053 return pci_register_driver (&net2280_pci_driver
);
3057 static void __exit
cleanup (void)
3059 pci_unregister_driver (&net2280_pci_driver
);
3061 module_exit (cleanup
);