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Source at commit be977234bfb4a6dca8a39e7c52165e4cd536ad71 created 12 years 9 months ago. By Lars-Peter Clausen, jz4740: Fix compile error | |
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1 | /* |
2 | * Driver for the PLX NET2280 USB device controller. |
3 | * Specs and errata are available from <http://www.plxtech.com>. |
4 | * |
5 | * PLX Technology Inc. (formerly NetChip Technology) supported the |
6 | * development of this driver. |
7 | * |
8 | * |
9 | * CODE STATUS HIGHLIGHTS |
10 | * |
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. |
14 | * |
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. |
20 | * |
21 | * Note that almost all the errata workarounds here are only needed for |
22 | * rev1 chips. Rev1a silicon (0110) fixes almost all of them. |
23 | */ |
24 | |
25 | /* |
26 | * Copyright (C) 2003 David Brownell |
27 | * Copyright (C) 2003-2005 PLX Technology, Inc. |
28 | * |
29 | * Modified Seth Levy 2005 PLX Technology, Inc. to provide compatibility |
30 | * with 2282 chip |
31 | * |
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. |
36 | * |
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. |
41 | * |
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 |
45 | */ |
46 | |
47 | #undef DEBUG /* messages on error and most fault paths */ |
48 | #undef VERBOSE /* extra debug messages (success too) */ |
49 | |
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> |
66 | |
67 | #include <asm/byteorder.h> |
68 | #include <asm/io.h> |
69 | #include <asm/irq.h> |
70 | #include <asm/system.h> |
71 | #include <asm/unaligned.h> |
72 | |
73 | |
74 | #define DRIVER_DESC "PLX NET228x USB Peripheral Controller" |
75 | #define DRIVER_VERSION "2005 Sept 27" |
76 | |
77 | #define DMA_ADDR_INVALID (~(dma_addr_t)0) |
78 | #define EP_DONTUSE 13 /* nonzero */ |
79 | |
80 | #define USE_RDK_LEDS /* GPIO pins control three LEDs */ |
81 | |
82 | |
83 | static const char driver_name [] = "net2280"; |
84 | static const char driver_desc [] = DRIVER_DESC; |
85 | |
86 | static const char ep0name [] = "ep0"; |
87 | static const char *const ep_name [] = { |
88 | ep0name, |
89 | "ep-a", "ep-b", "ep-c", "ep-d", |
90 | "ep-e", "ep-f", |
91 | }; |
92 | |
93 | /* use_dma -- general goodness, fewer interrupts, less cpu load (vs PIO) |
94 | * use_dma_chaining -- dma descriptor queueing gives even more irq reduction |
95 | * |
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. |
100 | */ |
101 | static int use_dma = 1; |
102 | static int use_dma_chaining = 0; |
103 | |
104 | /* "modprobe net2280 use_dma=n" etc */ |
105 | module_param (use_dma, bool, S_IRUGO); |
106 | module_param (use_dma_chaining, bool, S_IRUGO); |
107 | |
108 | |
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 |
112 | */ |
113 | static ushort fifo_mode = 0; |
114 | |
115 | /* "modprobe net2280 fifo_mode=1" etc */ |
116 | module_param (fifo_mode, ushort, 0644); |
117 | |
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 acceptable for |
121 | * self-powered devices |
122 | */ |
123 | static int enable_suspend = 0; |
124 | |
125 | /* "modprobe net2280 enable_suspend=1" etc */ |
126 | module_param (enable_suspend, bool, S_IRUGO); |
127 | |
128 | |
129 | #define DIR_STRING(bAddress) (((bAddress) & USB_DIR_IN) ? "in" : "out") |
130 | |
131 | #if defined(CONFIG_USB_GADGET_DEBUG_FILES) || defined (DEBUG) |
132 | static char *type_string (u8 bmAttributes) |
133 | { |
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"; |
138 | }; |
139 | return "control"; |
140 | } |
141 | #endif |
142 | |
143 | #include "net2280.h" |
144 | |
145 | #define valid_bit cpu_to_le32 (1 << VALID_BIT) |
146 | #define dma_done_ie cpu_to_le32 (1 << DMA_DONE_INTERRUPT_ENABLE) |
147 | |
148 | /*-------------------------------------------------------------------------*/ |
149 | |
150 | static int |
151 | net2280_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) |
152 | { |
153 | struct net2280 *dev; |
154 | struct net2280_ep *ep; |
155 | u32 max, tmp; |
156 | unsigned long flags; |
157 | |
158 | ep = container_of (_ep, struct net2280_ep, ep); |
159 | if (!_ep || !desc || ep->desc || _ep->name == ep0name |
160 | || desc->bDescriptorType != USB_DT_ENDPOINT) |
161 | return -EINVAL; |
162 | dev = ep->dev; |
163 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) |
164 | return -ESHUTDOWN; |
165 | |
166 | /* erratum 0119 workaround ties up an endpoint number */ |
167 | if ((desc->bEndpointAddress & 0x0f) == EP_DONTUSE) |
168 | return -EDOM; |
169 | |
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) |
173 | return -ERANGE; |
174 | |
175 | spin_lock_irqsave (&dev->lock, flags); |
176 | _ep->maxpacket = max & 0x7ff; |
177 | ep->desc = desc; |
178 | |
179 | /* ep_reset() has already been called */ |
180 | ep->stopped = 0; |
181 | ep->wedged = 0; |
182 | ep->out_overflow = 0; |
183 | |
184 | /* set speed-dependent max packet; may kick in high bandwidth */ |
185 | set_idx_reg (dev->regs, REG_EP_MAXPKT (dev, ep->num), max); |
186 | |
187 | /* FIFO lines can't go to different packets. PIO is ok, so |
188 | * use it instead of troublesome (non-bulk) multi-packet DMA. |
189 | */ |
190 | if (ep->dma && (max % 4) != 0 && use_dma_chaining) { |
191 | DEBUG (ep->dev, "%s, no dma for maxpacket %d\n", |
192 | ep->ep.name, ep->ep.maxpacket); |
193 | ep->dma = NULL; |
194 | } |
195 | |
196 | /* set type, direction, address; reset fifo counters */ |
197 | writel ((1 << FIFO_FLUSH), &ep->regs->ep_stat); |
198 | tmp = (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK); |
199 | if (tmp == USB_ENDPOINT_XFER_INT) { |
200 | /* erratum 0105 workaround prevents hs NYET */ |
201 | if (dev->chiprev == 0100 |
202 | && dev->gadget.speed == USB_SPEED_HIGH |
203 | && !(desc->bEndpointAddress & USB_DIR_IN)) |
204 | writel ((1 << CLEAR_NAK_OUT_PACKETS_MODE), |
205 | &ep->regs->ep_rsp); |
206 | } else if (tmp == USB_ENDPOINT_XFER_BULK) { |
207 | /* catch some particularly blatant driver bugs */ |
208 | if ((dev->gadget.speed == USB_SPEED_HIGH |
209 | && max != 512) |
210 | || (dev->gadget.speed == USB_SPEED_FULL |
211 | && max > 64)) { |
212 | spin_unlock_irqrestore (&dev->lock, flags); |
213 | return -ERANGE; |
214 | } |
215 | } |
216 | ep->is_iso = (tmp == USB_ENDPOINT_XFER_ISOC) ? 1 : 0; |
217 | tmp <<= ENDPOINT_TYPE; |
218 | tmp |= desc->bEndpointAddress; |
219 | tmp |= (4 << ENDPOINT_BYTE_COUNT); /* default full fifo lines */ |
220 | tmp |= 1 << ENDPOINT_ENABLE; |
221 | wmb (); |
222 | |
223 | /* for OUT transfers, block the rx fifo until a read is posted */ |
224 | ep->is_in = (tmp & USB_DIR_IN) != 0; |
225 | if (!ep->is_in) |
226 | writel ((1 << SET_NAK_OUT_PACKETS), &ep->regs->ep_rsp); |
227 | else if (dev->pdev->device != 0x2280) { |
228 | /* Added for 2282, Don't use nak packets on an in endpoint, |
229 | * this was ignored on 2280 |
230 | */ |
231 | writel ((1 << CLEAR_NAK_OUT_PACKETS) |
232 | | (1 << CLEAR_NAK_OUT_PACKETS_MODE), &ep->regs->ep_rsp); |
233 | } |
234 | |
235 | writel (tmp, &ep->regs->ep_cfg); |
236 | |
237 | /* enable irqs */ |
238 | if (!ep->dma) { /* pio, per-packet */ |
239 | tmp = (1 << ep->num) | readl (&dev->regs->pciirqenb0); |
240 | writel (tmp, &dev->regs->pciirqenb0); |
241 | |
242 | tmp = (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE) |
243 | | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE); |
244 | if (dev->pdev->device == 0x2280) |
245 | tmp |= readl (&ep->regs->ep_irqenb); |
246 | writel (tmp, &ep->regs->ep_irqenb); |
247 | } else { /* dma, per-request */ |
248 | tmp = (1 << (8 + ep->num)); /* completion */ |
249 | tmp |= readl (&dev->regs->pciirqenb1); |
250 | writel (tmp, &dev->regs->pciirqenb1); |
251 | |
252 | /* for short OUT transfers, dma completions can't |
253 | * advance the queue; do it pio-style, by hand. |
254 | * NOTE erratum 0112 workaround #2 |
255 | */ |
256 | if ((desc->bEndpointAddress & USB_DIR_IN) == 0) { |
257 | tmp = (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT_ENABLE); |
258 | writel (tmp, &ep->regs->ep_irqenb); |
259 | |
260 | tmp = (1 << ep->num) | readl (&dev->regs->pciirqenb0); |
261 | writel (tmp, &dev->regs->pciirqenb0); |
262 | } |
263 | } |
264 | |
265 | tmp = desc->bEndpointAddress; |
266 | DEBUG (dev, "enabled %s (ep%d%s-%s) %s max %04x\n", |
267 | _ep->name, tmp & 0x0f, DIR_STRING (tmp), |
268 | type_string (desc->bmAttributes), |
269 | ep->dma ? "dma" : "pio", max); |
270 | |
271 | /* pci writes may still be posted */ |
272 | spin_unlock_irqrestore (&dev->lock, flags); |
273 | return 0; |
274 | } |
275 | |
276 | static int handshake (u32 __iomem *ptr, u32 mask, u32 done, int usec) |
277 | { |
278 | u32 result; |
279 | |
280 | do { |
281 | result = readl (ptr); |
282 | if (result == ~(u32)0) /* "device unplugged" */ |
283 | return -ENODEV; |
284 | result &= mask; |
285 | if (result == done) |
286 | return 0; |
287 | udelay (1); |
288 | usec--; |
289 | } while (usec > 0); |
290 | return -ETIMEDOUT; |
291 | } |
292 | |
293 | static const struct usb_ep_ops net2280_ep_ops; |
294 | |
295 | static void ep_reset (struct net2280_regs __iomem *regs, struct net2280_ep *ep) |
296 | { |
297 | u32 tmp; |
298 | |
299 | ep->desc = NULL; |
300 | INIT_LIST_HEAD (&ep->queue); |
301 | |
302 | ep->ep.maxpacket = ~0; |
303 | ep->ep.ops = &net2280_ep_ops; |
304 | |
305 | /* disable the dma, irqs, endpoint... */ |
306 | if (ep->dma) { |
307 | writel (0, &ep->dma->dmactl); |
308 | writel ( (1 << DMA_SCATTER_GATHER_DONE_INTERRUPT) |
309 | | (1 << DMA_TRANSACTION_DONE_INTERRUPT) |
310 | | (1 << DMA_ABORT) |
311 | , &ep->dma->dmastat); |
312 | |
313 | tmp = readl (®s->pciirqenb0); |
314 | tmp &= ~(1 << ep->num); |
315 | writel (tmp, ®s->pciirqenb0); |
316 | } else { |
317 | tmp = readl (®s->pciirqenb1); |
318 | tmp &= ~(1 << (8 + ep->num)); /* completion */ |
319 | writel (tmp, ®s->pciirqenb1); |
320 | } |
321 | writel (0, &ep->regs->ep_irqenb); |
322 | |
323 | /* init to our chosen defaults, notably so that we NAK OUT |
324 | * packets until the driver queues a read (+note erratum 0112) |
325 | */ |
326 | if (!ep->is_in || ep->dev->pdev->device == 0x2280) { |
327 | tmp = (1 << SET_NAK_OUT_PACKETS_MODE) |
328 | | (1 << SET_NAK_OUT_PACKETS) |
329 | | (1 << CLEAR_EP_HIDE_STATUS_PHASE) |
330 | | (1 << CLEAR_INTERRUPT_MODE); |
331 | } else { |
332 | /* added for 2282 */ |
333 | tmp = (1 << CLEAR_NAK_OUT_PACKETS_MODE) |
334 | | (1 << CLEAR_NAK_OUT_PACKETS) |
335 | | (1 << CLEAR_EP_HIDE_STATUS_PHASE) |
336 | | (1 << CLEAR_INTERRUPT_MODE); |
337 | } |
338 | |
339 | if (ep->num != 0) { |
340 | tmp |= (1 << CLEAR_ENDPOINT_TOGGLE) |
341 | | (1 << CLEAR_ENDPOINT_HALT); |
342 | } |
343 | writel (tmp, &ep->regs->ep_rsp); |
344 | |
345 | /* scrub most status bits, and flush any fifo state */ |
346 | if (ep->dev->pdev->device == 0x2280) |
347 | tmp = (1 << FIFO_OVERFLOW) |
348 | | (1 << FIFO_UNDERFLOW); |
349 | else |
350 | tmp = 0; |
351 | |
352 | writel (tmp | (1 << TIMEOUT) |
353 | | (1 << USB_STALL_SENT) |
354 | | (1 << USB_IN_NAK_SENT) |
355 | | (1 << USB_IN_ACK_RCVD) |
356 | | (1 << USB_OUT_PING_NAK_SENT) |
357 | | (1 << USB_OUT_ACK_SENT) |
358 | | (1 << FIFO_FLUSH) |
359 | | (1 << SHORT_PACKET_OUT_DONE_INTERRUPT) |
360 | | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT) |
361 | | (1 << DATA_PACKET_RECEIVED_INTERRUPT) |
362 | | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT) |
363 | | (1 << DATA_OUT_PING_TOKEN_INTERRUPT) |
364 | | (1 << DATA_IN_TOKEN_INTERRUPT) |
365 | , &ep->regs->ep_stat); |
366 | |
367 | /* fifo size is handled separately */ |
368 | } |
369 | |
370 | static void nuke (struct net2280_ep *); |
371 | |
372 | static int net2280_disable (struct usb_ep *_ep) |
373 | { |
374 | struct net2280_ep *ep; |
375 | unsigned long flags; |
376 | |
377 | ep = container_of (_ep, struct net2280_ep, ep); |
378 | if (!_ep || !ep->desc || _ep->name == ep0name) |
379 | return -EINVAL; |
380 | |
381 | spin_lock_irqsave (&ep->dev->lock, flags); |
382 | nuke (ep); |
383 | ep_reset (ep->dev->regs, ep); |
384 | |
385 | VDEBUG (ep->dev, "disabled %s %s\n", |
386 | ep->dma ? "dma" : "pio", _ep->name); |
387 | |
388 | /* synch memory views with the device */ |
389 | (void) readl (&ep->regs->ep_cfg); |
390 | |
391 | if (use_dma && !ep->dma && ep->num >= 1 && ep->num <= 4) |
392 | ep->dma = &ep->dev->dma [ep->num - 1]; |
393 | |
394 | spin_unlock_irqrestore (&ep->dev->lock, flags); |
395 | return 0; |
396 | } |
397 | |
398 | /*-------------------------------------------------------------------------*/ |
399 | |
400 | static struct usb_request * |
401 | net2280_alloc_request (struct usb_ep *_ep, gfp_t gfp_flags) |
402 | { |
403 | struct net2280_ep *ep; |
404 | struct net2280_request *req; |
405 | |
406 | if (!_ep) |
407 | return NULL; |
408 | ep = container_of (_ep, struct net2280_ep, ep); |
409 | |
410 | req = kzalloc(sizeof(*req), gfp_flags); |
411 | if (!req) |
412 | return NULL; |
413 | |
414 | req->req.dma = DMA_ADDR_INVALID; |
415 | INIT_LIST_HEAD (&req->queue); |
416 | |
417 | /* this dma descriptor may be swapped with the previous dummy */ |
418 | if (ep->dma) { |
419 | struct net2280_dma *td; |
420 | |
421 | td = pci_pool_alloc (ep->dev->requests, gfp_flags, |
422 | &req->td_dma); |
423 | if (!td) { |
424 | kfree (req); |
425 | return NULL; |
426 | } |
427 | td->dmacount = 0; /* not VALID */ |
428 | td->dmaaddr = cpu_to_le32 (DMA_ADDR_INVALID); |
429 | td->dmadesc = td->dmaaddr; |
430 | req->td = td; |
431 | } |
432 | return &req->req; |
433 | } |
434 | |
435 | static void |
436 | net2280_free_request (struct usb_ep *_ep, struct usb_request *_req) |
437 | { |
438 | struct net2280_ep *ep; |
439 | struct net2280_request *req; |
440 | |
441 | ep = container_of (_ep, struct net2280_ep, ep); |
442 | if (!_ep || !_req) |
443 | return; |
444 | |
445 | req = container_of (_req, struct net2280_request, req); |
446 | WARN_ON (!list_empty (&req->queue)); |
447 | if (req->td) |
448 | pci_pool_free (ep->dev->requests, req->td, req->td_dma); |
449 | kfree (req); |
450 | } |
451 | |
452 | /*-------------------------------------------------------------------------*/ |
453 | |
454 | /* load a packet into the fifo we use for usb IN transfers. |
455 | * works for all endpoints. |
456 | * |
457 | * NOTE: pio with ep-a..ep-d could stuff multiple packets into the fifo |
458 | * at a time, but this code is simpler because it knows it only writes |
459 | * one packet. ep-a..ep-d should use dma instead. |
460 | */ |
461 | static void |
462 | write_fifo (struct net2280_ep *ep, struct usb_request *req) |
463 | { |
464 | struct net2280_ep_regs __iomem *regs = ep->regs; |
465 | u8 *buf; |
466 | u32 tmp; |
467 | unsigned count, total; |
468 | |
469 | /* INVARIANT: fifo is currently empty. (testable) */ |
470 | |
471 | if (req) { |
472 | buf = req->buf + req->actual; |
473 | prefetch (buf); |
474 | total = req->length - req->actual; |
475 | } else { |
476 | total = 0; |
477 | buf = NULL; |
478 | } |
479 | |
480 | /* write just one packet at a time */ |
481 | count = ep->ep.maxpacket; |
482 | if (count > total) /* min() cannot be used on a bitfield */ |
483 | count = total; |
484 | |
485 | VDEBUG (ep->dev, "write %s fifo (IN) %d bytes%s req %p\n", |
486 | ep->ep.name, count, |
487 | (count != ep->ep.maxpacket) ? " (short)" : "", |
488 | req); |
489 | while (count >= 4) { |
490 | /* NOTE be careful if you try to align these. fifo lines |
491 | * should normally be full (4 bytes) and successive partial |
492 | * lines are ok only in certain cases. |
493 | */ |
494 | tmp = get_unaligned ((u32 *)buf); |
495 | cpu_to_le32s (&tmp); |
496 | writel (tmp, ®s->ep_data); |
497 | buf += 4; |
498 | count -= 4; |
499 | } |
500 | |
501 | /* last fifo entry is "short" unless we wrote a full packet. |
502 | * also explicitly validate last word in (periodic) transfers |
503 | * when maxpacket is not a multiple of 4 bytes. |
504 | */ |
505 | if (count || total < ep->ep.maxpacket) { |
506 | tmp = count ? get_unaligned ((u32 *)buf) : count; |
507 | cpu_to_le32s (&tmp); |
508 | set_fifo_bytecount (ep, count & 0x03); |
509 | writel (tmp, ®s->ep_data); |
510 | } |
511 | |
512 | /* pci writes may still be posted */ |
513 | } |
514 | |
515 | /* work around erratum 0106: PCI and USB race over the OUT fifo. |
516 | * caller guarantees chiprev 0100, out endpoint is NAKing, and |
517 | * there's no real data in the fifo. |
518 | * |
519 | * NOTE: also used in cases where that erratum doesn't apply: |
520 | * where the host wrote "too much" data to us. |
521 | */ |
522 | static void out_flush (struct net2280_ep *ep) |
523 | { |
524 | u32 __iomem *statp; |
525 | u32 tmp; |
526 | |
527 | ASSERT_OUT_NAKING (ep); |
528 | |
529 | statp = &ep->regs->ep_stat; |
530 | writel ( (1 << DATA_OUT_PING_TOKEN_INTERRUPT) |
531 | | (1 << DATA_PACKET_RECEIVED_INTERRUPT) |
532 | , statp); |
533 | writel ((1 << FIFO_FLUSH), statp); |
534 | mb (); |
535 | tmp = readl (statp); |
536 | if (tmp & (1 << DATA_OUT_PING_TOKEN_INTERRUPT) |
537 | /* high speed did bulk NYET; fifo isn't filling */ |
538 | && ep->dev->gadget.speed == USB_SPEED_FULL) { |
539 | unsigned usec; |
540 | |
541 | usec = 50; /* 64 byte bulk/interrupt */ |
542 | handshake (statp, (1 << USB_OUT_PING_NAK_SENT), |
543 | (1 << USB_OUT_PING_NAK_SENT), usec); |
544 | /* NAK done; now CLEAR_NAK_OUT_PACKETS is safe */ |
545 | } |
546 | } |
547 | |
548 | /* unload packet(s) from the fifo we use for usb OUT transfers. |
549 | * returns true iff the request completed, because of short packet |
550 | * or the request buffer having filled with full packets. |
551 | * |
552 | * for ep-a..ep-d this will read multiple packets out when they |
553 | * have been accepted. |
554 | */ |
555 | static int |
556 | read_fifo (struct net2280_ep *ep, struct net2280_request *req) |
557 | { |
558 | struct net2280_ep_regs __iomem *regs = ep->regs; |
559 | u8 *buf = req->req.buf + req->req.actual; |
560 | unsigned count, tmp, is_short; |
561 | unsigned cleanup = 0, prevent = 0; |
562 | |
563 | /* erratum 0106 ... packets coming in during fifo reads might |
564 | * be incompletely rejected. not all cases have workarounds. |
565 | */ |
566 | if (ep->dev->chiprev == 0x0100 |
567 | && ep->dev->gadget.speed == USB_SPEED_FULL) { |
568 | udelay (1); |
569 | tmp = readl (&ep->regs->ep_stat); |
570 | if ((tmp & (1 << NAK_OUT_PACKETS))) |
571 | cleanup = 1; |
572 | else if ((tmp & (1 << FIFO_FULL))) { |
573 | start_out_naking (ep); |
574 | prevent = 1; |
575 | } |
576 | /* else: hope we don't see the problem */ |
577 | } |
578 | |
579 | /* never overflow the rx buffer. the fifo reads packets until |
580 | * it sees a short one; we might not be ready for them all. |
581 | */ |
582 | prefetchw (buf); |
583 | count = readl (®s->ep_avail); |
584 | if (unlikely (count == 0)) { |
585 | udelay (1); |
586 | tmp = readl (&ep->regs->ep_stat); |
587 | count = readl (®s->ep_avail); |
588 | /* handled that data already? */ |
589 | if (count == 0 && (tmp & (1 << NAK_OUT_PACKETS)) == 0) |
590 | return 0; |
591 | } |
592 | |
593 | tmp = req->req.length - req->req.actual; |
594 | if (count > tmp) { |
595 | /* as with DMA, data overflow gets flushed */ |
596 | if ((tmp % ep->ep.maxpacket) != 0) { |
597 | ERROR (ep->dev, |
598 | "%s out fifo %d bytes, expected %d\n", |
599 | ep->ep.name, count, tmp); |
600 | req->req.status = -EOVERFLOW; |
601 | cleanup = 1; |
602 | /* NAK_OUT_PACKETS will be set, so flushing is safe; |
603 | * the next read will start with the next packet |
604 | */ |
605 | } /* else it's a ZLP, no worries */ |
606 | count = tmp; |
607 | } |
608 | req->req.actual += count; |
609 | |
610 | is_short = (count == 0) || ((count % ep->ep.maxpacket) != 0); |
611 | |
612 | VDEBUG (ep->dev, "read %s fifo (OUT) %d bytes%s%s%s req %p %d/%d\n", |
613 | ep->ep.name, count, is_short ? " (short)" : "", |
614 | cleanup ? " flush" : "", prevent ? " nak" : "", |
615 | req, req->req.actual, req->req.length); |
616 | |
617 | while (count >= 4) { |
618 | tmp = readl (®s->ep_data); |
619 | cpu_to_le32s (&tmp); |
620 | put_unaligned (tmp, (u32 *)buf); |
621 | buf += 4; |
622 | count -= 4; |
623 | } |
624 | if (count) { |
625 | tmp = readl (®s->ep_data); |
626 | /* LE conversion is implicit here: */ |
627 | do { |
628 | *buf++ = (u8) tmp; |
629 | tmp >>= 8; |
630 | } while (--count); |
631 | } |
632 | if (cleanup) |
633 | out_flush (ep); |
634 | if (prevent) { |
635 | writel ((1 << CLEAR_NAK_OUT_PACKETS), &ep->regs->ep_rsp); |
636 | (void) readl (&ep->regs->ep_rsp); |
637 | } |
638 | |
639 | return is_short || ((req->req.actual == req->req.length) |
640 | && !req->req.zero); |
641 | } |
642 | |
643 | /* fill out dma descriptor to match a given request */ |
644 | static void |
645 | fill_dma_desc (struct net2280_ep *ep, struct net2280_request *req, int valid) |
646 | { |
647 | struct net2280_dma *td = req->td; |
648 | u32 dmacount = req->req.length; |
649 | |
650 | /* don't let DMA continue after a short OUT packet, |
651 | * so overruns can't affect the next transfer. |
652 | * in case of overruns on max-size packets, we can't |
653 | * stop the fifo from filling but we can flush it. |
654 | */ |
655 | if (ep->is_in) |
656 | dmacount |= (1 << DMA_DIRECTION); |
657 | if ((!ep->is_in && (dmacount % ep->ep.maxpacket) != 0) |
658 | || ep->dev->pdev->device != 0x2280) |
659 | dmacount |= (1 << END_OF_CHAIN); |
660 | |
661 | req->valid = valid; |
662 | if (valid) |
663 | dmacount |= (1 << VALID_BIT); |
664 | if (likely(!req->req.no_interrupt || !use_dma_chaining)) |
665 | dmacount |= (1 << DMA_DONE_INTERRUPT_ENABLE); |
666 | |
667 | /* td->dmadesc = previously set by caller */ |
668 | td->dmaaddr = cpu_to_le32 (req->req.dma); |
669 | |
670 | /* 2280 may be polling VALID_BIT through ep->dma->dmadesc */ |
671 | wmb (); |
672 | td->dmacount = cpu_to_le32(dmacount); |
673 | } |
674 | |
675 | static const u32 dmactl_default = |
676 | (1 << DMA_SCATTER_GATHER_DONE_INTERRUPT) |
677 | | (1 << DMA_CLEAR_COUNT_ENABLE) |
678 | /* erratum 0116 workaround part 1 (use POLLING) */ |
679 | | (POLL_100_USEC << DESCRIPTOR_POLLING_RATE) |
680 | | (1 << DMA_VALID_BIT_POLLING_ENABLE) |
681 | | (1 << DMA_VALID_BIT_ENABLE) |
682 | | (1 << DMA_SCATTER_GATHER_ENABLE) |
683 | /* erratum 0116 workaround part 2 (no AUTOSTART) */ |
684 | | (1 << DMA_ENABLE); |
685 | |
686 | static inline void spin_stop_dma (struct net2280_dma_regs __iomem *dma) |
687 | { |
688 | handshake (&dma->dmactl, (1 << DMA_ENABLE), 0, 50); |
689 | } |
690 | |
691 | static inline void stop_dma (struct net2280_dma_regs __iomem *dma) |
692 | { |
693 | writel (readl (&dma->dmactl) & ~(1 << DMA_ENABLE), &dma->dmactl); |
694 | spin_stop_dma (dma); |
695 | } |
696 | |
697 | static void start_queue (struct net2280_ep *ep, u32 dmactl, u32 td_dma) |
698 | { |
699 | struct net2280_dma_regs __iomem *dma = ep->dma; |
700 | unsigned int tmp = (1 << VALID_BIT) | (ep->is_in << DMA_DIRECTION); |
701 | |
702 | if (ep->dev->pdev->device != 0x2280) |
703 | tmp |= (1 << END_OF_CHAIN); |
704 | |
705 | writel (tmp, &dma->dmacount); |
706 | writel (readl (&dma->dmastat), &dma->dmastat); |
707 | |
708 | writel (td_dma, &dma->dmadesc); |
709 | writel (dmactl, &dma->dmactl); |
710 | |
711 | /* erratum 0116 workaround part 3: pci arbiter away from net2280 */ |
712 | (void) readl (&ep->dev->pci->pcimstctl); |
713 | |
714 | writel ((1 << DMA_START), &dma->dmastat); |
715 | |
716 | if (!ep->is_in) |
717 | stop_out_naking (ep); |
718 | } |
719 | |
720 | static void start_dma (struct net2280_ep *ep, struct net2280_request *req) |
721 | { |
722 | u32 tmp; |
723 | struct net2280_dma_regs __iomem *dma = ep->dma; |
724 | |
725 | /* FIXME can't use DMA for ZLPs */ |
726 | |
727 | /* on this path we "know" there's no dma active (yet) */ |
728 | WARN_ON (readl (&dma->dmactl) & (1 << DMA_ENABLE)); |
729 | writel (0, &ep->dma->dmactl); |
730 | |
731 | /* previous OUT packet might have been short */ |
732 | if (!ep->is_in && ((tmp = readl (&ep->regs->ep_stat)) |
733 | & (1 << NAK_OUT_PACKETS)) != 0) { |
734 | writel ((1 << SHORT_PACKET_TRANSFERRED_INTERRUPT), |
735 | &ep->regs->ep_stat); |
736 | |
737 | tmp = readl (&ep->regs->ep_avail); |
738 | if (tmp) { |
739 | writel (readl (&dma->dmastat), &dma->dmastat); |
740 | |
741 | /* transfer all/some fifo data */ |
742 | writel (req->req.dma, &dma->dmaaddr); |
743 | tmp = min (tmp, req->req.length); |
744 | |
745 | /* dma irq, faking scatterlist status */ |
746 | req->td->dmacount = cpu_to_le32 (req->req.length - tmp); |
747 | writel ((1 << DMA_DONE_INTERRUPT_ENABLE) |
748 | | tmp, &dma->dmacount); |
749 | req->td->dmadesc = 0; |
750 | req->valid = 1; |
751 | |
752 | writel ((1 << DMA_ENABLE), &dma->dmactl); |
753 | writel ((1 << DMA_START), &dma->dmastat); |
754 | return; |
755 | } |
756 | } |
757 | |
758 | tmp = dmactl_default; |
759 | |
760 | /* force packet boundaries between dma requests, but prevent the |
761 | * controller from automagically writing a last "short" packet |
762 | * (zero length) unless the driver explicitly said to do that. |
763 | */ |
764 | if (ep->is_in) { |
765 | if (likely ((req->req.length % ep->ep.maxpacket) != 0 |
766 | || req->req.zero)) { |
767 | tmp |= (1 << DMA_FIFO_VALIDATE); |
768 | ep->in_fifo_validate = 1; |
769 | } else |
770 | ep->in_fifo_validate = 0; |
771 | } |
772 | |
773 | /* init req->td, pointing to the current dummy */ |
774 | req->td->dmadesc = cpu_to_le32 (ep->td_dma); |
775 | fill_dma_desc (ep, req, 1); |
776 | |
777 | if (!use_dma_chaining) |
778 | req->td->dmacount |= cpu_to_le32 (1 << END_OF_CHAIN); |
779 | |
780 | start_queue (ep, tmp, req->td_dma); |
781 | } |
782 | |
783 | static inline void |
784 | queue_dma (struct net2280_ep *ep, struct net2280_request *req, int valid) |
785 | { |
786 | struct net2280_dma *end; |
787 | dma_addr_t tmp; |
788 | |
789 | /* swap new dummy for old, link; fill and maybe activate */ |
790 | end = ep->dummy; |
791 | ep->dummy = req->td; |
792 | req->td = end; |
793 | |
794 | tmp = ep->td_dma; |
795 | ep->td_dma = req->td_dma; |
796 | req->td_dma = tmp; |
797 | |
798 | end->dmadesc = cpu_to_le32 (ep->td_dma); |
799 | |
800 | fill_dma_desc (ep, req, valid); |
801 | } |
802 | |
803 | static void |
804 | done (struct net2280_ep *ep, struct net2280_request *req, int status) |
805 | { |
806 | struct net2280 *dev; |
807 | unsigned stopped = ep->stopped; |
808 | |
809 | list_del_init (&req->queue); |
810 | |
811 | if (req->req.status == -EINPROGRESS) |
812 | req->req.status = status; |
813 | else |
814 | status = req->req.status; |
815 | |
816 | dev = ep->dev; |
817 | if (req->mapped) { |
818 | pci_unmap_single (dev->pdev, req->req.dma, req->req.length, |
819 | ep->is_in ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); |
820 | req->req.dma = DMA_ADDR_INVALID; |
821 | req->mapped = 0; |
822 | } |
823 | |
824 | if (status && status != -ESHUTDOWN) |
825 | VDEBUG (dev, "complete %s req %p stat %d len %u/%u\n", |
826 | ep->ep.name, &req->req, status, |
827 | req->req.actual, req->req.length); |
828 | |
829 | /* don't modify queue heads during completion callback */ |
830 | ep->stopped = 1; |
831 | spin_unlock (&dev->lock); |
832 | req->req.complete (&ep->ep, &req->req); |
833 | spin_lock (&dev->lock); |
834 | ep->stopped = stopped; |
835 | } |
836 | |
837 | /*-------------------------------------------------------------------------*/ |
838 | |
839 | static int |
840 | net2280_queue (struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) |
841 | { |
842 | struct net2280_request *req; |
843 | struct net2280_ep *ep; |
844 | struct net2280 *dev; |
845 | unsigned long flags; |
846 | |
847 | /* we always require a cpu-view buffer, so that we can |
848 | * always use pio (as fallback or whatever). |
849 | */ |
850 | req = container_of (_req, struct net2280_request, req); |
851 | if (!_req || !_req->complete || !_req->buf |
852 | || !list_empty (&req->queue)) |
853 | return -EINVAL; |
854 | if (_req->length > (~0 & DMA_BYTE_COUNT_MASK)) |
855 | return -EDOM; |
856 | ep = container_of (_ep, struct net2280_ep, ep); |
857 | if (!_ep || (!ep->desc && ep->num != 0)) |
858 | return -EINVAL; |
859 | dev = ep->dev; |
860 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) |
861 | return -ESHUTDOWN; |
862 | |
863 | /* FIXME implement PIO fallback for ZLPs with DMA */ |
864 | if (ep->dma && _req->length == 0) |
865 | return -EOPNOTSUPP; |
866 | |
867 | /* set up dma mapping in case the caller didn't */ |
868 | if (ep->dma && _req->dma == DMA_ADDR_INVALID) { |
869 | _req->dma = pci_map_single (dev->pdev, _req->buf, _req->length, |
870 | ep->is_in ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); |
871 | req->mapped = 1; |
872 | } |
873 | |
874 | #if 0 |
875 | VDEBUG (dev, "%s queue req %p, len %d buf %p\n", |
876 | _ep->name, _req, _req->length, _req->buf); |
877 | #endif |
878 | |
879 | spin_lock_irqsave (&dev->lock, flags); |
880 | |
881 | _req->status = -EINPROGRESS; |
882 | _req->actual = 0; |
883 | |
884 | /* kickstart this i/o queue? */ |
885 | if (list_empty (&ep->queue) && !ep->stopped) { |
886 | /* use DMA if the endpoint supports it, else pio */ |
887 | if (ep->dma) |
888 | start_dma (ep, req); |
889 | else { |
890 | /* maybe there's no control data, just status ack */ |
891 | if (ep->num == 0 && _req->length == 0) { |
892 | allow_status (ep); |
893 | done (ep, req, 0); |
894 | VDEBUG (dev, "%s status ack\n", ep->ep.name); |
895 | goto done; |
896 | } |
897 | |
898 | /* PIO ... stuff the fifo, or unblock it. */ |
899 | if (ep->is_in) |
900 | write_fifo (ep, _req); |
901 | else if (list_empty (&ep->queue)) { |
902 | u32 s; |
903 | |
904 | /* OUT FIFO might have packet(s) buffered */ |
905 | s = readl (&ep->regs->ep_stat); |
906 | if ((s & (1 << FIFO_EMPTY)) == 0) { |
907 | /* note: _req->short_not_ok is |
908 | * ignored here since PIO _always_ |
909 | * stops queue advance here, and |
910 | * _req->status doesn't change for |
911 | * short reads (only _req->actual) |
912 | */ |
913 | if (read_fifo (ep, req)) { |
914 | done (ep, req, 0); |
915 | if (ep->num == 0) |
916 | allow_status (ep); |
917 | /* don't queue it */ |
918 | req = NULL; |
919 | } else |
920 | s = readl (&ep->regs->ep_stat); |
921 | } |
922 | |
923 | /* don't NAK, let the fifo fill */ |
924 | if (req && (s & (1 << NAK_OUT_PACKETS))) |
925 | writel ((1 << CLEAR_NAK_OUT_PACKETS), |
926 | &ep->regs->ep_rsp); |
927 | } |
928 | } |
929 | |
930 | } else if (ep->dma) { |
931 | int valid = 1; |
932 | |
933 | if (ep->is_in) { |
934 | int expect; |
935 | |
936 | /* preventing magic zlps is per-engine state, not |
937 | * per-transfer; irq logic must recover hiccups. |
938 | */ |
939 | expect = likely (req->req.zero |
940 | || (req->req.length % ep->ep.maxpacket) != 0); |
941 | if (expect != ep->in_fifo_validate) |
942 | valid = 0; |
943 | } |
944 | queue_dma (ep, req, valid); |
945 | |
946 | } /* else the irq handler advances the queue. */ |
947 | |
948 | ep->responded = 1; |
949 | if (req) |
950 | list_add_tail (&req->queue, &ep->queue); |
951 | done: |
952 | spin_unlock_irqrestore (&dev->lock, flags); |
953 | |
954 | /* pci writes may still be posted */ |
955 | return 0; |
956 | } |
957 | |
958 | static inline void |
959 | dma_done ( |
960 | struct net2280_ep *ep, |
961 | struct net2280_request *req, |
962 | u32 dmacount, |
963 | int status |
964 | ) |
965 | { |
966 | req->req.actual = req->req.length - (DMA_BYTE_COUNT_MASK & dmacount); |
967 | done (ep, req, status); |
968 | } |
969 | |
970 | static void restart_dma (struct net2280_ep *ep); |
971 | |
972 | static void scan_dma_completions (struct net2280_ep *ep) |
973 | { |
974 | /* only look at descriptors that were "naturally" retired, |
975 | * so fifo and list head state won't matter |
976 | */ |
977 | while (!list_empty (&ep->queue)) { |
978 | struct net2280_request *req; |
979 | u32 tmp; |
980 | |
981 | req = list_entry (ep->queue.next, |
982 | struct net2280_request, queue); |
983 | if (!req->valid) |
984 | break; |
985 | rmb (); |
986 | tmp = le32_to_cpup (&req->td->dmacount); |
987 | if ((tmp & (1 << VALID_BIT)) != 0) |
988 | break; |
989 | |
990 | /* SHORT_PACKET_TRANSFERRED_INTERRUPT handles "usb-short" |
991 | * cases where DMA must be aborted; this code handles |
992 | * all non-abort DMA completions. |
993 | */ |
994 | if (unlikely (req->td->dmadesc == 0)) { |
995 | /* paranoia */ |
996 | tmp = readl (&ep->dma->dmacount); |
997 | if (tmp & DMA_BYTE_COUNT_MASK) |
998 | break; |
999 | /* single transfer mode */ |
1000 | dma_done (ep, req, tmp, 0); |
1001 | break; |
1002 | } else if (!ep->is_in |
1003 | && (req->req.length % ep->ep.maxpacket) != 0) { |
1004 | tmp = readl (&ep->regs->ep_stat); |
1005 | |
1006 | /* AVOID TROUBLE HERE by not issuing short reads from |
1007 | * your gadget driver. That helps avoids errata 0121, |
1008 | * 0122, and 0124; not all cases trigger the warning. |
1009 | */ |
1010 | if ((tmp & (1 << NAK_OUT_PACKETS)) == 0) { |
1011 | WARNING (ep->dev, "%s lost packet sync!\n", |
1012 | ep->ep.name); |
1013 | req->req.status = -EOVERFLOW; |
1014 | } else if ((tmp = readl (&ep->regs->ep_avail)) != 0) { |
1015 | /* fifo gets flushed later */ |
1016 | ep->out_overflow = 1; |
1017 | DEBUG (ep->dev, "%s dma, discard %d len %d\n", |
1018 | ep->ep.name, tmp, |
1019 | req->req.length); |
1020 | req->req.status = -EOVERFLOW; |
1021 | } |
1022 | } |
1023 | dma_done (ep, req, tmp, 0); |
1024 | } |
1025 | } |
1026 | |
1027 | static void restart_dma (struct net2280_ep *ep) |
1028 | { |
1029 | struct net2280_request *req; |
1030 | u32 dmactl = dmactl_default; |
1031 | |
1032 | if (ep->stopped) |
1033 | return; |
1034 | req = list_entry (ep->queue.next, struct net2280_request, queue); |
1035 | |
1036 | if (!use_dma_chaining) { |
1037 | start_dma (ep, req); |
1038 | return; |
1039 | } |
1040 | |
1041 | /* the 2280 will be processing the queue unless queue hiccups after |
1042 | * the previous transfer: |
1043 | * IN: wanted automagic zlp, head doesn't (or vice versa) |
1044 | * DMA_FIFO_VALIDATE doesn't init from dma descriptors. |
1045 | * OUT: was "usb-short", we must restart. |
1046 | */ |
1047 | if (ep->is_in && !req->valid) { |
1048 | struct net2280_request *entry, *prev = NULL; |
1049 | int reqmode, done = 0; |
1050 | |
1051 | DEBUG (ep->dev, "%s dma hiccup td %p\n", ep->ep.name, req->td); |
1052 | ep->in_fifo_validate = likely (req->req.zero |
1053 | || (req->req.length % ep->ep.maxpacket) != 0); |
1054 | if (ep->in_fifo_validate) |
1055 | dmactl |= (1 << DMA_FIFO_VALIDATE); |
1056 | list_for_each_entry (entry, &ep->queue, queue) { |
1057 | __le32 dmacount; |
1058 | |
1059 | if (entry == req) |
1060 | continue; |
1061 | dmacount = entry->td->dmacount; |
1062 | if (!done) { |
1063 | reqmode = likely (entry->req.zero |
1064 | || (entry->req.length |
1065 | % ep->ep.maxpacket) != 0); |
1066 | if (reqmode == ep->in_fifo_validate) { |
1067 | entry->valid = 1; |
1068 | dmacount |= valid_bit; |
1069 | entry->td->dmacount = dmacount; |
1070 | prev = entry; |
1071 | continue; |
1072 | } else { |
1073 | /* force a hiccup */ |
1074 | prev->td->dmacount |= dma_done_ie; |
1075 | done = 1; |
1076 | } |
1077 | } |
1078 | |
1079 | /* walk the rest of the queue so unlinks behave */ |
1080 | entry->valid = 0; |
1081 | dmacount &= ~valid_bit; |
1082 | entry->td->dmacount = dmacount; |
1083 | prev = entry; |
1084 | } |
1085 | } |
1086 | |
1087 | writel (0, &ep->dma->dmactl); |
1088 | start_queue (ep, dmactl, req->td_dma); |
1089 | } |
1090 | |
1091 | static void abort_dma (struct net2280_ep *ep) |
1092 | { |
1093 | /* abort the current transfer */ |
1094 | if (likely (!list_empty (&ep->queue))) { |
1095 | /* FIXME work around errata 0121, 0122, 0124 */ |
1096 | writel ((1 << DMA_ABORT), &ep->dma->dmastat); |
1097 | spin_stop_dma (ep->dma); |
1098 | } else |
1099 | stop_dma (ep->dma); |
1100 | scan_dma_completions (ep); |
1101 | } |
1102 | |
1103 | /* dequeue ALL requests */ |
1104 | static void nuke (struct net2280_ep *ep) |
1105 | { |
1106 | struct net2280_request *req; |
1107 | |
1108 | /* called with spinlock held */ |
1109 | ep->stopped = 1; |
1110 | if (ep->dma) |
1111 | abort_dma (ep); |
1112 | while (!list_empty (&ep->queue)) { |
1113 | req = list_entry (ep->queue.next, |
1114 | struct net2280_request, |
1115 | queue); |
1116 | done (ep, req, -ESHUTDOWN); |
1117 | } |
1118 | } |
1119 | |
1120 | /* dequeue JUST ONE request */ |
1121 | static int net2280_dequeue (struct usb_ep *_ep, struct usb_request *_req) |
1122 | { |
1123 | struct net2280_ep *ep; |
1124 | struct net2280_request *req; |
1125 | unsigned long flags; |
1126 | u32 dmactl; |
1127 | int stopped; |
1128 | |
1129 | ep = container_of (_ep, struct net2280_ep, ep); |
1130 | if (!_ep || (!ep->desc && ep->num != 0) || !_req) |
1131 | return -EINVAL; |
1132 | |
1133 | spin_lock_irqsave (&ep->dev->lock, flags); |
1134 | stopped = ep->stopped; |
1135 | |
1136 | /* quiesce dma while we patch the queue */ |
1137 | dmactl = 0; |
1138 | ep->stopped = 1; |
1139 | if (ep->dma) { |
1140 | dmactl = readl (&ep->dma->dmactl); |
1141 | /* WARNING erratum 0127 may kick in ... */ |
1142 | stop_dma (ep->dma); |
1143 | scan_dma_completions (ep); |
1144 | } |
1145 | |
1146 | /* make sure it's still queued on this endpoint */ |
1147 | list_for_each_entry (req, &ep->queue, queue) { |
1148 | if (&req->req == _req) |
1149 | break; |
1150 | } |
1151 | if (&req->req != _req) { |
1152 | spin_unlock_irqrestore (&ep->dev->lock, flags); |
1153 | return -EINVAL; |
1154 | } |
1155 | |
1156 | /* queue head may be partially complete. */ |
1157 | if (ep->queue.next == &req->queue) { |
1158 | if (ep->dma) { |
1159 | DEBUG (ep->dev, "unlink (%s) dma\n", _ep->name); |
1160 | _req->status = -ECONNRESET; |
1161 | abort_dma (ep); |
1162 | if (likely (ep->queue.next == &req->queue)) { |
1163 | // NOTE: misreports single-transfer mode |
1164 | req->td->dmacount = 0; /* invalidate */ |
1165 | dma_done (ep, req, |
1166 | readl (&ep->dma->dmacount), |
1167 | -ECONNRESET); |
1168 | } |
1169 | } else { |
1170 | DEBUG (ep->dev, "unlink (%s) pio\n", _ep->name); |
1171 | done (ep, req, -ECONNRESET); |
1172 | } |
1173 | req = NULL; |
1174 | |
1175 | /* patch up hardware chaining data */ |
1176 | } else if (ep->dma && use_dma_chaining) { |
1177 | if (req->queue.prev == ep->queue.next) { |
1178 | writel (le32_to_cpu (req->td->dmadesc), |
1179 | &ep->dma->dmadesc); |
1180 | if (req->td->dmacount & dma_done_ie) |
1181 | writel (readl (&ep->dma->dmacount) |
1182 | | le32_to_cpu(dma_done_ie), |
1183 | &ep->dma->dmacount); |
1184 | } else { |
1185 | struct net2280_request *prev; |
1186 | |
1187 | prev = list_entry (req->queue.prev, |
1188 | struct net2280_request, queue); |
1189 | prev->td->dmadesc = req->td->dmadesc; |
1190 | if (req->td->dmacount & dma_done_ie) |
1191 | prev->td->dmacount |= dma_done_ie; |
1192 | } |
1193 | } |
1194 | |
1195 | if (req) |
1196 | done (ep, req, -ECONNRESET); |
1197 | ep->stopped = stopped; |
1198 | |
1199 | if (ep->dma) { |
1200 | /* turn off dma on inactive queues */ |
1201 | if (list_empty (&ep->queue)) |
1202 | stop_dma (ep->dma); |
1203 | else if (!ep->stopped) { |
1204 | /* resume current request, or start new one */ |
1205 | if (req) |
1206 | writel (dmactl, &ep->dma->dmactl); |
1207 | else |
1208 | start_dma (ep, list_entry (ep->queue.next, |
1209 | struct net2280_request, queue)); |
1210 | } |
1211 | } |
1212 | |
1213 | spin_unlock_irqrestore (&ep->dev->lock, flags); |
1214 | return 0; |
1215 | } |
1216 | |
1217 | /*-------------------------------------------------------------------------*/ |
1218 | |
1219 | static int net2280_fifo_status (struct usb_ep *_ep); |
1220 | |
1221 | static int |
1222 | net2280_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged) |
1223 | { |
1224 | struct net2280_ep *ep; |
1225 | unsigned long flags; |
1226 | int retval = 0; |
1227 | |
1228 | ep = container_of (_ep, struct net2280_ep, ep); |
1229 | if (!_ep || (!ep->desc && ep->num != 0)) |
1230 | return -EINVAL; |
1231 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) |
1232 | return -ESHUTDOWN; |
1233 | if (ep->desc /* not ep0 */ && (ep->desc->bmAttributes & 0x03) |
1234 | == USB_ENDPOINT_XFER_ISOC) |
1235 | return -EINVAL; |
1236 | |
1237 | spin_lock_irqsave (&ep->dev->lock, flags); |
1238 | if (!list_empty (&ep->queue)) |
1239 | retval = -EAGAIN; |
1240 | else if (ep->is_in && value && net2280_fifo_status (_ep) != 0) |
1241 | retval = -EAGAIN; |
1242 | else { |
1243 | VDEBUG (ep->dev, "%s %s %s\n", _ep->name, |
1244 | value ? "set" : "clear", |
1245 | wedged ? "wedge" : "halt"); |
1246 | /* set/clear, then synch memory views with the device */ |
1247 | if (value) { |
1248 | if (ep->num == 0) |
1249 | ep->dev->protocol_stall = 1; |
1250 | else |
1251 | set_halt (ep); |
1252 | if (wedged) |
1253 | ep->wedged = 1; |
1254 | } else { |
1255 | clear_halt (ep); |
1256 | ep->wedged = 0; |
1257 | } |
1258 | (void) readl (&ep->regs->ep_rsp); |
1259 | } |
1260 | spin_unlock_irqrestore (&ep->dev->lock, flags); |
1261 | |
1262 | return retval; |
1263 | } |
1264 | |
1265 | static int |
1266 | net2280_set_halt(struct usb_ep *_ep, int value) |
1267 | { |
1268 | return net2280_set_halt_and_wedge(_ep, value, 0); |
1269 | } |
1270 | |
1271 | static int |
1272 | net2280_set_wedge(struct usb_ep *_ep) |
1273 | { |
1274 | if (!_ep || _ep->name == ep0name) |
1275 | return -EINVAL; |
1276 | return net2280_set_halt_and_wedge(_ep, 1, 1); |
1277 | } |
1278 | |
1279 | static int |
1280 | net2280_fifo_status (struct usb_ep *_ep) |
1281 | { |
1282 | struct net2280_ep *ep; |
1283 | u32 avail; |
1284 | |
1285 | ep = container_of (_ep, struct net2280_ep, ep); |
1286 | if (!_ep || (!ep->desc && ep->num != 0)) |
1287 | return -ENODEV; |
1288 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) |
1289 | return -ESHUTDOWN; |
1290 | |
1291 | avail = readl (&ep->regs->ep_avail) & ((1 << 12) - 1); |
1292 | if (avail > ep->fifo_size) |
1293 | return -EOVERFLOW; |
1294 | if (ep->is_in) |
1295 | avail = ep->fifo_size - avail; |
1296 | return avail; |
1297 | } |
1298 | |
1299 | static void |
1300 | net2280_fifo_flush (struct usb_ep *_ep) |
1301 | { |
1302 | struct net2280_ep *ep; |
1303 | |
1304 | ep = container_of (_ep, struct net2280_ep, ep); |
1305 | if (!_ep || (!ep->desc && ep->num != 0)) |
1306 | return; |
1307 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) |
1308 | return; |
1309 | |
1310 | writel ((1 << FIFO_FLUSH), &ep->regs->ep_stat); |
1311 | (void) readl (&ep->regs->ep_rsp); |
1312 | } |
1313 | |
1314 | static const struct usb_ep_ops net2280_ep_ops = { |
1315 | .enable = net2280_enable, |
1316 | .disable = net2280_disable, |
1317 | |
1318 | .alloc_request = net2280_alloc_request, |
1319 | .free_request = net2280_free_request, |
1320 | |
1321 | .queue = net2280_queue, |
1322 | .dequeue = net2280_dequeue, |
1323 | |
1324 | .set_halt = net2280_set_halt, |
1325 | .set_wedge = net2280_set_wedge, |
1326 | .fifo_status = net2280_fifo_status, |
1327 | .fifo_flush = net2280_fifo_flush, |
1328 | }; |
1329 | |
1330 | /*-------------------------------------------------------------------------*/ |
1331 | |
1332 | static int net2280_get_frame (struct usb_gadget *_gadget) |
1333 | { |
1334 | struct net2280 *dev; |
1335 | unsigned long flags; |
1336 | u16 retval; |
1337 | |
1338 | if (!_gadget) |
1339 | return -ENODEV; |
1340 | dev = container_of (_gadget, struct net2280, gadget); |
1341 | spin_lock_irqsave (&dev->lock, flags); |
1342 | retval = get_idx_reg (dev->regs, REG_FRAME) & 0x03ff; |
1343 | spin_unlock_irqrestore (&dev->lock, flags); |
1344 | return retval; |
1345 | } |
1346 | |
1347 | static int net2280_wakeup (struct usb_gadget *_gadget) |
1348 | { |
1349 | struct net2280 *dev; |
1350 | u32 tmp; |
1351 | unsigned long flags; |
1352 | |
1353 | if (!_gadget) |
1354 | return 0; |
1355 | dev = container_of (_gadget, struct net2280, gadget); |
1356 | |
1357 | spin_lock_irqsave (&dev->lock, flags); |
1358 | tmp = readl (&dev->usb->usbctl); |
1359 | if (tmp & (1 << DEVICE_REMOTE_WAKEUP_ENABLE)) |
1360 | writel (1 << GENERATE_RESUME, &dev->usb->usbstat); |
1361 | spin_unlock_irqrestore (&dev->lock, flags); |
1362 | |
1363 | /* pci writes may still be posted */ |
1364 | return 0; |
1365 | } |
1366 | |
1367 | static int net2280_set_selfpowered (struct usb_gadget *_gadget, int value) |
1368 | { |
1369 | struct net2280 *dev; |
1370 | u32 tmp; |
1371 | unsigned long flags; |
1372 | |
1373 | if (!_gadget) |
1374 | return 0; |
1375 | dev = container_of (_gadget, struct net2280, gadget); |
1376 | |
1377 | spin_lock_irqsave (&dev->lock, flags); |
1378 | tmp = readl (&dev->usb->usbctl); |
1379 | if (value) |
1380 | tmp |= (1 << SELF_POWERED_STATUS); |
1381 | else |
1382 | tmp &= ~(1 << SELF_POWERED_STATUS); |
1383 | writel (tmp, &dev->usb->usbctl); |
1384 | spin_unlock_irqrestore (&dev->lock, flags); |
1385 | |
1386 | return 0; |
1387 | } |
1388 | |
1389 | static int net2280_pullup(struct usb_gadget *_gadget, int is_on) |
1390 | { |
1391 | struct net2280 *dev; |
1392 | u32 tmp; |
1393 | unsigned long flags; |
1394 | |
1395 | if (!_gadget) |
1396 | return -ENODEV; |
1397 | dev = container_of (_gadget, struct net2280, gadget); |
1398 | |
1399 | spin_lock_irqsave (&dev->lock, flags); |
1400 | tmp = readl (&dev->usb->usbctl); |
1401 | dev->softconnect = (is_on != 0); |
1402 | if (is_on) |
1403 | tmp |= (1 << USB_DETECT_ENABLE); |
1404 | else |
1405 | tmp &= ~(1 << USB_DETECT_ENABLE); |
1406 | writel (tmp, &dev->usb->usbctl); |
1407 | spin_unlock_irqrestore (&dev->lock, flags); |
1408 | |
1409 | return 0; |
1410 | } |
1411 | |
1412 | static const struct usb_gadget_ops net2280_ops = { |
1413 | .get_frame = net2280_get_frame, |
1414 | .wakeup = net2280_wakeup, |
1415 | .set_selfpowered = net2280_set_selfpowered, |
1416 | .pullup = net2280_pullup, |
1417 | }; |
1418 | |
1419 | /*-------------------------------------------------------------------------*/ |
1420 | |
1421 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES |
1422 | |
1423 | /* FIXME move these into procfs, and use seq_file. |
1424 | * Sysfs _still_ doesn't behave for arbitrarily sized files, |
1425 | * and also doesn't help products using this with 2.4 kernels. |
1426 | */ |
1427 | |
1428 | /* "function" sysfs attribute */ |
1429 | static ssize_t |
1430 | show_function (struct device *_dev, struct device_attribute *attr, char *buf) |
1431 | { |
1432 | struct net2280 *dev = dev_get_drvdata (_dev); |
1433 | |
1434 | if (!dev->driver |
1435 | || !dev->driver->function |
1436 | || strlen (dev->driver->function) > PAGE_SIZE) |
1437 | return 0; |
1438 | return scnprintf (buf, PAGE_SIZE, "%s\n", dev->driver->function); |
1439 | } |
1440 | static DEVICE_ATTR (function, S_IRUGO, show_function, NULL); |
1441 | |
1442 | static ssize_t net2280_show_registers(struct device *_dev, |
1443 | struct device_attribute *attr, char *buf) |
1444 | { |
1445 | struct net2280 *dev; |
1446 | char *next; |
1447 | unsigned size, t; |
1448 | unsigned long flags; |
1449 | int i; |
1450 | u32 t1, t2; |
1451 | const char *s; |
1452 | |
1453 | dev = dev_get_drvdata (_dev); |
1454 | next = buf; |
1455 | size = PAGE_SIZE; |
1456 | spin_lock_irqsave (&dev->lock, flags); |
1457 | |
1458 | if (dev->driver) |
1459 | s = dev->driver->driver.name; |
1460 | else |
1461 | s = "(none)"; |
1462 | |
1463 | /* Main Control Registers */ |
1464 | t = scnprintf (next, size, "%s version " DRIVER_VERSION |
1465 | ", chiprev %04x, dma %s\n\n" |
1466 | "devinit %03x fifoctl %08x gadget '%s'\n" |
1467 | "pci irqenb0 %02x irqenb1 %08x " |
1468 | "irqstat0 %04x irqstat1 %08x\n", |
1469 | driver_name, dev->chiprev, |
1470 | use_dma |
1471 | ? (use_dma_chaining ? "chaining" : "enabled") |
1472 | : "disabled", |
1473 | readl (&dev->regs->devinit), |
1474 | readl (&dev->regs->fifoctl), |
1475 | s, |
1476 | readl (&dev->regs->pciirqenb0), |
1477 | readl (&dev->regs->pciirqenb1), |
1478 | readl (&dev->regs->irqstat0), |
1479 | readl (&dev->regs->irqstat1)); |
1480 | size -= t; |
1481 | next += t; |
1482 | |
1483 | /* USB Control Registers */ |
1484 | t1 = readl (&dev->usb->usbctl); |
1485 | t2 = readl (&dev->usb->usbstat); |
1486 | if (t1 & (1 << VBUS_PIN)) { |
1487 | if (t2 & (1 << HIGH_SPEED)) |
1488 | s = "high speed"; |
1489 | else if (dev->gadget.speed == USB_SPEED_UNKNOWN) |
1490 | s = "powered"; |
1491 | else |
1492 | s = "full speed"; |
1493 | /* full speed bit (6) not working?? */ |
1494 | } else |
1495 | s = "not attached"; |
1496 | t = scnprintf (next, size, |
1497 | "stdrsp %08x usbctl %08x usbstat %08x " |
1498 | "addr 0x%02x (%s)\n", |
1499 | readl (&dev->usb->stdrsp), t1, t2, |
1500 | readl (&dev->usb->ouraddr), s); |
1501 | size -= t; |
1502 | next += t; |
1503 | |
1504 | /* PCI Master Control Registers */ |
1505 | |
1506 | /* DMA Control Registers */ |
1507 | |
1508 | /* Configurable EP Control Registers */ |
1509 | for (i = 0; i < 7; i++) { |
1510 | struct net2280_ep *ep; |
1511 | |
1512 | ep = &dev->ep [i]; |
1513 | if (i && !ep->desc) |
1514 | continue; |
1515 | |
1516 | t1 = readl (&ep->regs->ep_cfg); |
1517 | t2 = readl (&ep->regs->ep_rsp) & 0xff; |
1518 | t = scnprintf (next, size, |
1519 | "\n%s\tcfg %05x rsp (%02x) %s%s%s%s%s%s%s%s" |
1520 | "irqenb %02x\n", |
1521 | ep->ep.name, t1, t2, |
1522 | (t2 & (1 << CLEAR_NAK_OUT_PACKETS)) |
1523 | ? "NAK " : "", |
1524 | (t2 & (1 << CLEAR_EP_HIDE_STATUS_PHASE)) |
1525 | ? "hide " : "", |
1526 | (t2 & (1 << CLEAR_EP_FORCE_CRC_ERROR)) |
1527 | ? "CRC " : "", |
1528 | (t2 & (1 << CLEAR_INTERRUPT_MODE)) |
1529 | ? "interrupt " : "", |
1530 | (t2 & (1<<CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE)) |
1531 | ? "status " : "", |
1532 | (t2 & (1 << CLEAR_NAK_OUT_PACKETS_MODE)) |
1533 | ? "NAKmode " : "", |
1534 | (t2 & (1 << CLEAR_ENDPOINT_TOGGLE)) |
1535 | ? "DATA1 " : "DATA0 ", |
1536 | (t2 & (1 << CLEAR_ENDPOINT_HALT)) |
1537 | ? "HALT " : "", |
1538 | readl (&ep->regs->ep_irqenb)); |
1539 | size -= t; |
1540 | next += t; |
1541 | |
1542 | t = scnprintf (next, size, |
1543 | "\tstat %08x avail %04x " |
1544 | "(ep%d%s-%s)%s\n", |
1545 | readl (&ep->regs->ep_stat), |
1546 | readl (&ep->regs->ep_avail), |
1547 | t1 & 0x0f, DIR_STRING (t1), |
1548 | type_string (t1 >> 8), |
1549 | ep->stopped ? "*" : ""); |
1550 | size -= t; |
1551 | next += t; |
1552 | |
1553 | if (!ep->dma) |
1554 | continue; |
1555 | |
1556 | t = scnprintf (next, size, |
1557 | " dma\tctl %08x stat %08x count %08x\n" |
1558 | "\taddr %08x desc %08x\n", |
1559 | readl (&ep->dma->dmactl), |
1560 | readl (&ep->dma->dmastat), |
1561 | readl (&ep->dma->dmacount), |
1562 | readl (&ep->dma->dmaaddr), |
1563 | readl (&ep->dma->dmadesc)); |
1564 | size -= t; |
1565 | next += t; |
1566 | |
1567 | } |
1568 | |
1569 | /* Indexed Registers */ |
1570 | // none yet |
1571 | |
1572 | /* Statistics */ |
1573 | t = scnprintf (next, size, "\nirqs: "); |
1574 | size -= t; |
1575 | next += t; |
1576 | for (i = 0; i < 7; i++) { |
1577 | struct net2280_ep *ep; |
1578 | |
1579 | ep = &dev->ep [i]; |
1580 | if (i && !ep->irqs) |
1581 | continue; |
1582 | t = scnprintf (next, size, " %s/%lu", ep->ep.name, ep->irqs); |
1583 | size -= t; |
1584 | next += t; |
1585 | |
1586 | } |
1587 | t = scnprintf (next, size, "\n"); |
1588 | size -= t; |
1589 | next += t; |
1590 | |
1591 | spin_unlock_irqrestore (&dev->lock, flags); |
1592 | |
1593 | return PAGE_SIZE - size; |
1594 | } |
1595 | static DEVICE_ATTR(registers, S_IRUGO, net2280_show_registers, NULL); |
1596 | |
1597 | static ssize_t |
1598 | show_queues (struct device *_dev, struct device_attribute *attr, char *buf) |
1599 | { |
1600 | struct net2280 *dev; |
1601 | char *next; |
1602 | unsigned size; |
1603 | unsigned long flags; |
1604 | int i; |
1605 | |
1606 | dev = dev_get_drvdata (_dev); |
1607 | next = buf; |
1608 | size = PAGE_SIZE; |
1609 | spin_lock_irqsave (&dev->lock, flags); |
1610 | |
1611 | for (i = 0; i < 7; i++) { |
1612 | struct net2280_ep *ep = &dev->ep [i]; |
1613 | struct net2280_request *req; |
1614 | int t; |
1615 | |
1616 | if (i != 0) { |
1617 | const struct usb_endpoint_descriptor *d; |
1618 | |
1619 | d = ep->desc; |
1620 | if (!d) |
1621 | continue; |
1622 | t = d->bEndpointAddress; |
1623 | t = scnprintf (next, size, |
1624 | "\n%s (ep%d%s-%s) max %04x %s fifo %d\n", |
1625 | ep->ep.name, t & USB_ENDPOINT_NUMBER_MASK, |
1626 | (t & USB_DIR_IN) ? "in" : "out", |
1627 | ({ char *val; |
1628 | switch (d->bmAttributes & 0x03) { |
1629 | case USB_ENDPOINT_XFER_BULK: |
1630 | val = "bulk"; break; |
1631 | case USB_ENDPOINT_XFER_INT: |
1632 | val = "intr"; break; |
1633 | default: |
1634 | val = "iso"; break; |
1635 | }; val; }), |
1636 | le16_to_cpu (d->wMaxPacketSize) & 0x1fff, |
1637 | ep->dma ? "dma" : "pio", ep->fifo_size |
1638 | ); |
1639 | } else /* ep0 should only have one transfer queued */ |
1640 | t = scnprintf (next, size, "ep0 max 64 pio %s\n", |
1641 | ep->is_in ? "in" : "out"); |
1642 | if (t <= 0 || t > size) |
1643 | goto done; |
1644 | size -= t; |
1645 | next += t; |
1646 | |
1647 | if (list_empty (&ep->queue)) { |
1648 | t = scnprintf (next, size, "\t(nothing queued)\n"); |
1649 | if (t <= 0 || t > size) |
1650 | goto done; |
1651 | size -= t; |
1652 | next += t; |
1653 | continue; |
1654 | } |
1655 | list_for_each_entry (req, &ep->queue, queue) { |
1656 | if (ep->dma && req->td_dma == readl (&ep->dma->dmadesc)) |
1657 | t = scnprintf (next, size, |
1658 | "\treq %p len %d/%d " |
1659 | "buf %p (dmacount %08x)\n", |
1660 | &req->req, req->req.actual, |
1661 | req->req.length, req->req.buf, |
1662 | readl (&ep->dma->dmacount)); |
1663 | else |
1664 | t = scnprintf (next, size, |
1665 | "\treq %p len %d/%d buf %p\n", |
1666 | &req->req, req->req.actual, |
1667 | req->req.length, req->req.buf); |
1668 | if (t <= 0 || t > size) |
1669 | goto done; |
1670 | size -= t; |
1671 | next += t; |
1672 | |
1673 | if (ep->dma) { |
1674 | struct net2280_dma *td; |
1675 | |
1676 | td = req->td; |
1677 | t = scnprintf (next, size, "\t td %08x " |
1678 | " count %08x buf %08x desc %08x\n", |
1679 | (u32) req->td_dma, |
1680 | le32_to_cpu (td->dmacount), |
1681 | le32_to_cpu (td->dmaaddr), |
1682 | le32_to_cpu (td->dmadesc)); |
1683 | if (t <= 0 || t > size) |
1684 | goto done; |
1685 | size -= t; |
1686 | next += t; |
1687 | } |
1688 | } |
1689 | } |
1690 | |
1691 | done: |
1692 | spin_unlock_irqrestore (&dev->lock, flags); |
1693 | return PAGE_SIZE - size; |
1694 | } |
1695 | static DEVICE_ATTR (queues, S_IRUGO, show_queues, NULL); |
1696 | |
1697 | |
1698 | #else |
1699 | |
1700 | #define device_create_file(a,b) (0) |
1701 | #define device_remove_file(a,b) do { } while (0) |
1702 | |
1703 | #endif |
1704 | |
1705 | /*-------------------------------------------------------------------------*/ |
1706 | |
1707 | /* another driver-specific mode might be a request type doing dma |
1708 | * to/from another device fifo instead of to/from memory. |
1709 | */ |
1710 | |
1711 | static void set_fifo_mode (struct net2280 *dev, int mode) |
1712 | { |
1713 | /* keeping high bits preserves BAR2 */ |
1714 | writel ((0xffff << PCI_BASE2_RANGE) | mode, &dev->regs->fifoctl); |
1715 | |
1716 | /* always ep-{a,b,e,f} ... maybe not ep-c or ep-d */ |
1717 | INIT_LIST_HEAD (&dev->gadget.ep_list); |
1718 | list_add_tail (&dev->ep [1].ep.ep_list, &dev->gadget.ep_list); |
1719 | list_add_tail (&dev->ep [2].ep.ep_list, &dev->gadget.ep_list); |
1720 | switch (mode) { |
1721 | case 0: |
1722 | list_add_tail (&dev->ep [3].ep.ep_list, &dev->gadget.ep_list); |
1723 | list_add_tail (&dev->ep [4].ep.ep_list, &dev->gadget.ep_list); |
1724 | dev->ep [1].fifo_size = dev->ep [2].fifo_size = 1024; |
1725 | break; |
1726 | case 1: |
1727 | dev->ep [1].fifo_size = dev->ep [2].fifo_size = 2048; |
1728 | break; |
1729 | case 2: |
1730 | list_add_tail (&dev->ep [3].ep.ep_list, &dev->gadget.ep_list); |
1731 | dev->ep [1].fifo_size = 2048; |
1732 | dev->ep [2].fifo_size = 1024; |
1733 | break; |
1734 | } |
1735 | /* fifo sizes for ep0, ep-c, ep-d, ep-e, and ep-f never change */ |
1736 | list_add_tail (&dev->ep [5].ep.ep_list, &dev->gadget.ep_list); |
1737 | list_add_tail (&dev->ep [6].ep.ep_list, &dev->gadget.ep_list); |
1738 | } |
1739 | |
1740 | /* just declare this in any driver that really need it */ |
1741 | extern int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode); |
1742 | |
1743 | /** |
1744 | * net2280_set_fifo_mode - change allocation of fifo buffers |
1745 | * @gadget: access to the net2280 device that will be updated |
1746 | * @mode: 0 for default, four 1kB buffers (ep-a through ep-d); |
1747 | * 1 for two 2kB buffers (ep-a and ep-b only); |
1748 | * 2 for one 2kB buffer (ep-a) and two 1kB ones (ep-b, ep-c). |
1749 | * |
1750 | * returns zero on success, else negative errno. when this succeeds, |
1751 | * the contents of gadget->ep_list may have changed. |
1752 | * |
1753 | * you may only call this function when endpoints a-d are all disabled. |
1754 | * use it whenever extra hardware buffering can help performance, such |
1755 | * as before enabling "high bandwidth" interrupt endpoints that use |
1756 | * maxpacket bigger than 512 (when double buffering would otherwise |
1757 | * be unavailable). |
1758 | */ |
1759 | int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode) |
1760 | { |
1761 | int i; |
1762 | struct net2280 *dev; |
1763 | int status = 0; |
1764 | unsigned long flags; |
1765 | |
1766 | if (!gadget) |
1767 | return -ENODEV; |
1768 | dev = container_of (gadget, struct net2280, gadget); |
1769 | |
1770 | spin_lock_irqsave (&dev->lock, flags); |
1771 | |
1772 | for (i = 1; i <= 4; i++) |
1773 | if (dev->ep [i].desc) { |
1774 | status = -EINVAL; |
1775 | break; |
1776 | } |
1777 | if (mode < 0 || mode > 2) |
1778 | status = -EINVAL; |
1779 | if (status == 0) |
1780 | set_fifo_mode (dev, mode); |
1781 | spin_unlock_irqrestore (&dev->lock, flags); |
1782 | |
1783 | if (status == 0) { |
1784 | if (mode == 1) |
1785 | DEBUG (dev, "fifo: ep-a 2K, ep-b 2K\n"); |
1786 | else if (mode == 2) |
1787 | DEBUG (dev, "fifo: ep-a 2K, ep-b 1K, ep-c 1K\n"); |
1788 | /* else all are 1K */ |
1789 | } |
1790 | return status; |
1791 | } |
1792 | EXPORT_SYMBOL (net2280_set_fifo_mode); |
1793 | |
1794 | /*-------------------------------------------------------------------------*/ |
1795 | |
1796 | /* keeping it simple: |
1797 | * - one bus driver, initted first; |
1798 | * - one function driver, initted second |
1799 | * |
1800 | * most of the work to support multiple net2280 controllers would |
1801 | * be to associate this gadget driver (yes?) with all of them, or |
1802 | * perhaps to bind specific drivers to specific devices. |
1803 | */ |
1804 | |
1805 | static struct net2280 *the_controller; |
1806 | |
1807 | static void usb_reset (struct net2280 *dev) |
1808 | { |
1809 | u32 tmp; |
1810 | |
1811 | dev->gadget.speed = USB_SPEED_UNKNOWN; |
1812 | (void) readl (&dev->usb->usbctl); |
1813 | |
1814 | net2280_led_init (dev); |
1815 | |
1816 | /* disable automatic responses, and irqs */ |
1817 | writel (0, &dev->usb->stdrsp); |
1818 | writel (0, &dev->regs->pciirqenb0); |
1819 | writel (0, &dev->regs->pciirqenb1); |
1820 | |
1821 | /* clear old dma and irq state */ |
1822 | for (tmp = 0; tmp < 4; tmp++) { |
1823 | struct net2280_ep *ep = &dev->ep [tmp + 1]; |
1824 | |
1825 | if (ep->dma) |
1826 | abort_dma (ep); |
1827 | } |
1828 | writel (~0, &dev->regs->irqstat0), |
1829 | writel (~(1 << SUSPEND_REQUEST_INTERRUPT), &dev->regs->irqstat1), |
1830 | |
1831 | /* reset, and enable pci */ |
1832 | tmp = readl (&dev->regs->devinit) |
1833 | | (1 << PCI_ENABLE) |
1834 | | (1 << FIFO_SOFT_RESET) |
1835 | | (1 << USB_SOFT_RESET) |
1836 | | (1 << M8051_RESET); |
1837 | writel (tmp, &dev->regs->devinit); |
1838 | |
1839 | /* standard fifo and endpoint allocations */ |
1840 | set_fifo_mode (dev, (fifo_mode <= 2) ? fifo_mode : 0); |
1841 | } |
1842 | |
1843 | static void usb_reinit (struct net2280 *dev) |
1844 | { |
1845 | u32 tmp; |
1846 | int init_dma; |
1847 | |
1848 | /* use_dma changes are ignored till next device re-init */ |
1849 | init_dma = use_dma; |
1850 | |
1851 | /* basic endpoint init */ |
1852 | for (tmp = 0; tmp < 7; tmp++) { |
1853 | struct net2280_ep *ep = &dev->ep [tmp]; |
1854 | |
1855 | ep->ep.name = ep_name [tmp]; |
1856 | ep->dev = dev; |
1857 | ep->num = tmp; |
1858 | |
1859 | if (tmp > 0 && tmp <= 4) { |
1860 | ep->fifo_size = 1024; |
1861 | if (init_dma) |
1862 | ep->dma = &dev->dma [tmp - 1]; |
1863 | } else |
1864 | ep->fifo_size = 64; |
1865 | ep->regs = &dev->epregs [tmp]; |
1866 | ep_reset (dev->regs, ep); |
1867 | } |
1868 | dev->ep [0].ep.maxpacket = 64; |
1869 | dev->ep [5].ep.maxpacket = 64; |
1870 | dev->ep [6].ep.maxpacket = 64; |
1871 | |
1872 | dev->gadget.ep0 = &dev->ep [0].ep; |
1873 | dev->ep [0].stopped = 0; |
1874 | INIT_LIST_HEAD (&dev->gadget.ep0->ep_list); |
1875 | |
1876 | /* we want to prevent lowlevel/insecure access from the USB host, |
1877 | * but erratum 0119 means this enable bit is ignored |
1878 | */ |
1879 | for (tmp = 0; tmp < 5; tmp++) |
1880 | writel (EP_DONTUSE, &dev->dep [tmp].dep_cfg); |
1881 | } |
1882 | |
1883 | static void ep0_start (struct net2280 *dev) |
1884 | { |
1885 | writel ( (1 << CLEAR_EP_HIDE_STATUS_PHASE) |
1886 | | (1 << CLEAR_NAK_OUT_PACKETS) |
1887 | | (1 << CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE) |
1888 | , &dev->epregs [0].ep_rsp); |
1889 | |
1890 | /* |
1891 | * hardware optionally handles a bunch of standard requests |
1892 | * that the API hides from drivers anyway. have it do so. |
1893 | * endpoint status/features are handled in software, to |
1894 | * help pass tests for some dubious behavior. |
1895 | */ |
1896 | writel ( (1 << SET_TEST_MODE) |
1897 | | (1 << SET_ADDRESS) |
1898 | | (1 << DEVICE_SET_CLEAR_DEVICE_REMOTE_WAKEUP) |
1899 | | (1 << GET_DEVICE_STATUS) |
1900 | | (1 << GET_INTERFACE_STATUS) |
1901 | , &dev->usb->stdrsp); |
1902 | writel ( (1 << USB_ROOT_PORT_WAKEUP_ENABLE) |
1903 | | (1 << SELF_POWERED_USB_DEVICE) |
1904 | | (1 << REMOTE_WAKEUP_SUPPORT) |
1905 | | (dev->softconnect << USB_DETECT_ENABLE) |
1906 | | (1 << SELF_POWERED_STATUS) |
1907 | , &dev->usb->usbctl); |
1908 | |
1909 | /* enable irqs so we can see ep0 and general operation */ |
1910 | writel ( (1 << SETUP_PACKET_INTERRUPT_ENABLE) |
1911 | | (1 << ENDPOINT_0_INTERRUPT_ENABLE) |
1912 | , &dev->regs->pciirqenb0); |
1913 | writel ( (1 << PCI_INTERRUPT_ENABLE) |
1914 | | (1 << PCI_MASTER_ABORT_RECEIVED_INTERRUPT_ENABLE) |
1915 | | (1 << PCI_TARGET_ABORT_RECEIVED_INTERRUPT_ENABLE) |
1916 | | (1 << PCI_RETRY_ABORT_INTERRUPT_ENABLE) |
1917 | | (1 << VBUS_INTERRUPT_ENABLE) |
1918 | | (1 << ROOT_PORT_RESET_INTERRUPT_ENABLE) |
1919 | | (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE) |
1920 | , &dev->regs->pciirqenb1); |
1921 | |
1922 | /* don't leave any writes posted */ |
1923 | (void) readl (&dev->usb->usbctl); |
1924 | } |
1925 | |
1926 | /* when a driver is successfully registered, it will receive |
1927 | * control requests including set_configuration(), which enables |
1928 | * non-control requests. then usb traffic follows until a |
1929 | * disconnect is reported. then a host may connect again, or |
1930 | * the driver might get unbound. |
1931 | */ |
1932 | int usb_gadget_probe_driver(struct usb_gadget_driver *driver, |
1933 | int (*bind)(struct usb_gadget *)) |
1934 | { |
1935 | struct net2280 *dev = the_controller; |
1936 | int retval; |
1937 | unsigned i; |
1938 | |
1939 | /* insist on high speed support from the driver, since |
1940 | * (dev->usb->xcvrdiag & FORCE_FULL_SPEED_MODE) |
1941 | * "must not be used in normal operation" |
1942 | */ |
1943 | if (!driver |
1944 | || driver->speed != USB_SPEED_HIGH |
1945 | || !bind || !driver->setup) |
1946 | return -EINVAL; |
1947 | if (!dev) |
1948 | return -ENODEV; |
1949 | if (dev->driver) |
1950 | return -EBUSY; |
1951 | |
1952 | for (i = 0; i < 7; i++) |
1953 | dev->ep [i].irqs = 0; |
1954 | |
1955 | /* hook up the driver ... */ |
1956 | dev->softconnect = 1; |
1957 | driver->driver.bus = NULL; |
1958 | dev->driver = driver; |
1959 | dev->gadget.dev.driver = &driver->driver; |
1960 | retval = bind(&dev->gadget); |
1961 | if (retval) { |
1962 | DEBUG (dev, "bind to driver %s --> %d\n", |
1963 | driver->driver.name, retval); |
1964 | dev->driver = NULL; |
1965 | dev->gadget.dev.driver = NULL; |
1966 | return retval; |
1967 | } |
1968 | |
1969 | retval = device_create_file (&dev->pdev->dev, &dev_attr_function); |
1970 | if (retval) goto err_unbind; |
1971 | retval = device_create_file (&dev->pdev->dev, &dev_attr_queues); |
1972 | if (retval) goto err_func; |
1973 | |
1974 | /* ... then enable host detection and ep0; and we're ready |
1975 | * for set_configuration as well as eventual disconnect. |
1976 | */ |
1977 | net2280_led_active (dev, 1); |
1978 | ep0_start (dev); |
1979 | |
1980 | DEBUG (dev, "%s ready, usbctl %08x stdrsp %08x\n", |
1981 | driver->driver.name, |
1982 | readl (&dev->usb->usbctl), |
1983 | readl (&dev->usb->stdrsp)); |
1984 | |
1985 | /* pci writes may still be posted */ |
1986 | return 0; |
1987 | |
1988 | err_func: |
1989 | device_remove_file (&dev->pdev->dev, &dev_attr_function); |
1990 | err_unbind: |
1991 | driver->unbind (&dev->gadget); |
1992 | dev->gadget.dev.driver = NULL; |
1993 | dev->driver = NULL; |
1994 | return retval; |
1995 | } |
1996 | EXPORT_SYMBOL(usb_gadget_probe_driver); |
1997 | |
1998 | static void |
1999 | stop_activity (struct net2280 *dev, struct usb_gadget_driver *driver) |
2000 | { |
2001 | int i; |
2002 | |
2003 | /* don't disconnect if it's not connected */ |
2004 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) |
2005 | driver = NULL; |
2006 | |
2007 | /* stop hardware; prevent new request submissions; |
2008 | * and kill any outstanding requests. |
2009 | */ |
2010 | usb_reset (dev); |
2011 | for (i = 0; i < 7; i++) |
2012 | nuke (&dev->ep [i]); |
2013 | |
2014 | /* report disconnect; the driver is already quiesced */ |
2015 | if (driver) { |
2016 | spin_unlock (&dev->lock); |
2017 | driver->disconnect (&dev->gadget); |
2018 | spin_lock (&dev->lock); |
2019 | } |
2020 | |
2021 | usb_reinit (dev); |
2022 | } |
2023 | |
2024 | int usb_gadget_unregister_driver (struct usb_gadget_driver *driver) |
2025 | { |
2026 | struct net2280 *dev = the_controller; |
2027 | unsigned long flags; |
2028 | |
2029 | if (!dev) |
2030 | return -ENODEV; |
2031 | if (!driver || driver != dev->driver || !driver->unbind) |
2032 | return -EINVAL; |
2033 | |
2034 | spin_lock_irqsave (&dev->lock, flags); |
2035 | stop_activity (dev, driver); |
2036 | spin_unlock_irqrestore (&dev->lock, flags); |
2037 | |
2038 | net2280_pullup (&dev->gadget, 0); |
2039 | |
2040 | driver->unbind (&dev->gadget); |
2041 | dev->gadget.dev.driver = NULL; |
2042 | dev->driver = NULL; |
2043 | |
2044 | net2280_led_active (dev, 0); |
2045 | device_remove_file (&dev->pdev->dev, &dev_attr_function); |
2046 | device_remove_file (&dev->pdev->dev, &dev_attr_queues); |
2047 | |
2048 | DEBUG (dev, "unregistered driver '%s'\n", driver->driver.name); |
2049 | return 0; |
2050 | } |
2051 | EXPORT_SYMBOL (usb_gadget_unregister_driver); |
2052 | |
2053 | |
2054 | /*-------------------------------------------------------------------------*/ |
2055 | |
2056 | /* handle ep0, ep-e, ep-f with 64 byte packets: packet per irq. |
2057 | * also works for dma-capable endpoints, in pio mode or just |
2058 | * to manually advance the queue after short OUT transfers. |
2059 | */ |
2060 | static void handle_ep_small (struct net2280_ep *ep) |
2061 | { |
2062 | struct net2280_request *req; |
2063 | u32 t; |
2064 | /* 0 error, 1 mid-data, 2 done */ |
2065 | int mode = 1; |
2066 | |
2067 | if (!list_empty (&ep->queue)) |
2068 | req = list_entry (ep->queue.next, |
2069 | struct net2280_request, queue); |
2070 | else |
2071 | req = NULL; |
2072 | |
2073 | /* ack all, and handle what we care about */ |
2074 | t = readl (&ep->regs->ep_stat); |
2075 | ep->irqs++; |
2076 | #if 0 |
2077 | VDEBUG (ep->dev, "%s ack ep_stat %08x, req %p\n", |
2078 | ep->ep.name, t, req ? &req->req : 0); |
2079 | #endif |
2080 | if (!ep->is_in || ep->dev->pdev->device == 0x2280) |
2081 | writel (t & ~(1 << NAK_OUT_PACKETS), &ep->regs->ep_stat); |
2082 | else |
2083 | /* Added for 2282 */ |
2084 | writel (t, &ep->regs->ep_stat); |
2085 | |
2086 | /* for ep0, monitor token irqs to catch data stage length errors |
2087 | * and to synchronize on status. |
2088 | * |
2089 | * also, to defer reporting of protocol stalls ... here's where |
2090 | * data or status first appears, handling stalls here should never |
2091 | * cause trouble on the host side.. |
2092 | * |
2093 | * control requests could be slightly faster without token synch for |
2094 | * status, but status can jam up that way. |
2095 | */ |
2096 | if (unlikely (ep->num == 0)) { |
2097 | if (ep->is_in) { |
2098 | /* status; stop NAKing */ |
2099 | if (t & (1 << DATA_OUT_PING_TOKEN_INTERRUPT)) { |
2100 | if (ep->dev->protocol_stall) { |
2101 | ep->stopped = 1; |
2102 | set_halt (ep); |
2103 | } |
2104 | if (!req) |
2105 | allow_status (ep); |
2106 | mode = 2; |
2107 | /* reply to extra IN data tokens with a zlp */ |
2108 | } else if (t & (1 << DATA_IN_TOKEN_INTERRUPT)) { |
2109 | if (ep->dev->protocol_stall) { |
2110 | ep->stopped = 1; |
2111 | set_halt (ep); |
2112 | mode = 2; |
2113 | } else if (ep->responded && |
2114 | !req && !ep->stopped) |
2115 | write_fifo (ep, NULL); |
2116 | } |
2117 | } else { |
2118 | /* status; stop NAKing */ |
2119 | if (t & (1 << DATA_IN_TOKEN_INTERRUPT)) { |
2120 | if (ep->dev->protocol_stall) { |
2121 | ep->stopped = 1; |
2122 | set_halt (ep); |
2123 | } |
2124 | mode = 2; |
2125 | /* an extra OUT token is an error */ |
2126 | } else if (((t & (1 << DATA_OUT_PING_TOKEN_INTERRUPT)) |
2127 | && req |
2128 | && req->req.actual == req->req.length) |
2129 | || (ep->responded && !req)) { |
2130 | ep->dev->protocol_stall = 1; |
2131 | set_halt (ep); |
2132 | ep->stopped = 1; |
2133 | if (req) |
2134 | done (ep, req, -EOVERFLOW); |
2135 | req = NULL; |
2136 | } |
2137 | } |
2138 | } |
2139 | |
2140 | if (unlikely (!req)) |
2141 | return; |
2142 | |
2143 | /* manual DMA queue advance after short OUT */ |
2144 | if (likely (ep->dma != 0)) { |
2145 | if (t & (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)) { |
2146 | u32 count; |
2147 | int stopped = ep->stopped; |
2148 | |
2149 | /* TRANSFERRED works around OUT_DONE erratum 0112. |
2150 | * we expect (N <= maxpacket) bytes; host wrote M. |
2151 | * iff (M < N) we won't ever see a DMA interrupt. |
2152 | */ |
2153 | ep->stopped = 1; |
2154 | for (count = 0; ; t = readl (&ep->regs->ep_stat)) { |
2155 | |
2156 | /* any preceding dma transfers must finish. |
2157 | * dma handles (M >= N), may empty the queue |
2158 | */ |
2159 | scan_dma_completions (ep); |
2160 | if (unlikely (list_empty (&ep->queue) |
2161 | || ep->out_overflow)) { |
2162 | req = NULL; |
2163 | break; |
2164 | } |
2165 | req = list_entry (ep->queue.next, |
2166 | struct net2280_request, queue); |
2167 | |
2168 | /* here either (M < N), a "real" short rx; |
2169 | * or (M == N) and the queue didn't empty |
2170 | */ |
2171 | if (likely (t & (1 << FIFO_EMPTY))) { |
2172 | count = readl (&ep->dma->dmacount); |
2173 | count &= DMA_BYTE_COUNT_MASK; |
2174 | if (readl (&ep->dma->dmadesc) |
2175 | != req->td_dma) |
2176 | req = NULL; |
2177 | break; |
2178 | } |
2179 | udelay(1); |
2180 | } |
2181 | |
2182 | /* stop DMA, leave ep NAKing */ |
2183 | writel ((1 << DMA_ABORT), &ep->dma->dmastat); |
2184 | spin_stop_dma (ep->dma); |
2185 | |
2186 | if (likely (req)) { |
2187 | req->td->dmacount = 0; |
2188 | t = readl (&ep->regs->ep_avail); |
2189 | dma_done (ep, req, count, |
2190 | (ep->out_overflow || t) |
2191 | ? -EOVERFLOW : 0); |
2192 | } |
2193 | |
2194 | /* also flush to prevent erratum 0106 trouble */ |
2195 | if (unlikely (ep->out_overflow |
2196 | || (ep->dev->chiprev == 0x0100 |
2197 | && ep->dev->gadget.speed |
2198 | == USB_SPEED_FULL))) { |
2199 | out_flush (ep); |
2200 | ep->out_overflow = 0; |
2201 | } |
2202 | |
2203 | /* (re)start dma if needed, stop NAKing */ |
2204 | ep->stopped = stopped; |
2205 | if (!list_empty (&ep->queue)) |
2206 | restart_dma (ep); |
2207 | } else |
2208 | DEBUG (ep->dev, "%s dma ep_stat %08x ??\n", |
2209 | ep->ep.name, t); |
2210 | return; |
2211 | |
2212 | /* data packet(s) received (in the fifo, OUT) */ |
2213 | } else if (t & (1 << DATA_PACKET_RECEIVED_INTERRUPT)) { |
2214 | if (read_fifo (ep, req) && ep->num != 0) |
2215 | mode = 2; |
2216 | |
2217 | /* data packet(s) transmitted (IN) */ |
2218 | } else if (t & (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)) { |
2219 | unsigned len; |
2220 | |
2221 | len = req->req.length - req->req.actual; |
2222 | if (len > ep->ep.maxpacket) |
2223 | len = ep->ep.maxpacket; |
2224 | req->req.actual += len; |
2225 | |
2226 | /* if we wrote it all, we're usually done */ |
2227 | if (req->req.actual == req->req.length) { |
2228 | if (ep->num == 0) { |
2229 | /* send zlps until the status stage */ |
2230 | } else if (!req->req.zero || len != ep->ep.maxpacket) |
2231 | mode = 2; |
2232 | } |
2233 | |
2234 | /* there was nothing to do ... */ |
2235 | } else if (mode == 1) |
2236 | return; |
2237 | |
2238 | /* done */ |
2239 | if (mode == 2) { |
2240 | /* stream endpoints often resubmit/unlink in completion */ |
2241 | done (ep, req, 0); |
2242 | |
2243 | /* maybe advance queue to next request */ |
2244 | if (ep->num == 0) { |
2245 | /* NOTE: net2280 could let gadget driver start the |
2246 | * status stage later. since not all controllers let |
2247 | * them control that, the api doesn't (yet) allow it. |
2248 | */ |
2249 | if (!ep->stopped) |
2250 | allow_status (ep); |
2251 | req = NULL; |
2252 | } else { |
2253 | if (!list_empty (&ep->queue) && !ep->stopped) |
2254 | req = list_entry (ep->queue.next, |
2255 | struct net2280_request, queue); |
2256 | else |
2257 | req = NULL; |
2258 | if (req && !ep->is_in) |
2259 | stop_out_naking (ep); |
2260 | } |
2261 | } |
2262 | |
2263 | /* is there a buffer for the next packet? |
2264 | * for best streaming performance, make sure there is one. |
2265 | */ |
2266 | if (req && !ep->stopped) { |
2267 | |
2268 | /* load IN fifo with next packet (may be zlp) */ |
2269 | if (t & (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)) |
2270 | write_fifo (ep, &req->req); |
2271 | } |
2272 | } |
2273 | |
2274 | static struct net2280_ep * |
2275 | get_ep_by_addr (struct net2280 *dev, u16 wIndex) |
2276 | { |
2277 | struct net2280_ep *ep; |
2278 | |
2279 | if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0) |
2280 | return &dev->ep [0]; |
2281 | list_for_each_entry (ep, &dev->gadget.ep_list, ep.ep_list) { |
2282 | u8 bEndpointAddress; |
2283 | |
2284 | if (!ep->desc) |
2285 | continue; |
2286 | bEndpointAddress = ep->desc->bEndpointAddress; |
2287 | if ((wIndex ^ bEndpointAddress) & USB_DIR_IN) |
2288 | continue; |
2289 | if ((wIndex & 0x0f) == (bEndpointAddress & 0x0f)) |
2290 | return ep; |
2291 | } |
2292 | return NULL; |
2293 | } |
2294 | |
2295 | static void handle_stat0_irqs (struct net2280 *dev, u32 stat) |
2296 | { |
2297 | struct net2280_ep *ep; |
2298 | u32 num, scratch; |
2299 | |
2300 | /* most of these don't need individual acks */ |
2301 | stat &= ~(1 << INTA_ASSERTED); |
2302 | if (!stat) |
2303 | return; |
2304 | // DEBUG (dev, "irqstat0 %04x\n", stat); |
2305 | |
2306 | /* starting a control request? */ |
2307 | if (unlikely (stat & (1 << SETUP_PACKET_INTERRUPT))) { |
2308 | union { |
2309 | u32 raw [2]; |
2310 | struct usb_ctrlrequest r; |
2311 | } u; |
2312 | int tmp; |
2313 | struct net2280_request *req; |
2314 | |
2315 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) { |
2316 | if (readl (&dev->usb->usbstat) & (1 << HIGH_SPEED)) |
2317 | dev->gadget.speed = USB_SPEED_HIGH; |
2318 | else |
2319 | dev->gadget.speed = USB_SPEED_FULL; |
2320 | net2280_led_speed (dev, dev->gadget.speed); |
2321 | DEBUG (dev, "%s speed\n", |
2322 | (dev->gadget.speed == USB_SPEED_HIGH) |
2323 | ? "high" : "full"); |
2324 | } |
2325 | |
2326 | ep = &dev->ep [0]; |
2327 | ep->irqs++; |
2328 | |
2329 | /* make sure any leftover request state is cleared */ |
2330 | stat &= ~(1 << ENDPOINT_0_INTERRUPT); |
2331 | while (!list_empty (&ep->queue)) { |
2332 | req = list_entry (ep->queue.next, |
2333 | struct net2280_request, queue); |
2334 | done (ep, req, (req->req.actual == req->req.length) |
2335 | ? 0 : -EPROTO); |
2336 | } |
2337 | ep->stopped = 0; |
2338 | dev->protocol_stall = 0; |
2339 | |
2340 | if (ep->dev->pdev->device == 0x2280) |
2341 | tmp = (1 << FIFO_OVERFLOW) |
2342 | | (1 << FIFO_UNDERFLOW); |
2343 | else |
2344 | tmp = 0; |
2345 | |
2346 | writel (tmp | (1 << TIMEOUT) |
2347 | | (1 << USB_STALL_SENT) |
2348 | | (1 << USB_IN_NAK_SENT) |
2349 | | (1 << USB_IN_ACK_RCVD) |
2350 | | (1 << USB_OUT_PING_NAK_SENT) |
2351 | | (1 << USB_OUT_ACK_SENT) |
2352 | | (1 << SHORT_PACKET_OUT_DONE_INTERRUPT) |
2353 | | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT) |
2354 | | (1 << DATA_PACKET_RECEIVED_INTERRUPT) |
2355 | | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT) |
2356 | | (1 << DATA_OUT_PING_TOKEN_INTERRUPT) |
2357 | | (1 << DATA_IN_TOKEN_INTERRUPT) |
2358 | , &ep->regs->ep_stat); |
2359 | u.raw [0] = readl (&dev->usb->setup0123); |
2360 | u.raw [1] = readl (&dev->usb->setup4567); |
2361 | |
2362 | cpu_to_le32s (&u.raw [0]); |
2363 | cpu_to_le32s (&u.raw [1]); |
2364 | |
2365 | tmp = 0; |
2366 | |
2367 | #define w_value le16_to_cpu(u.r.wValue) |
2368 | #define w_index le16_to_cpu(u.r.wIndex) |
2369 | #define w_length le16_to_cpu(u.r.wLength) |
2370 | |
2371 | /* ack the irq */ |
2372 | writel (1 << SETUP_PACKET_INTERRUPT, &dev->regs->irqstat0); |
2373 | stat ^= (1 << SETUP_PACKET_INTERRUPT); |
2374 | |
2375 | /* watch control traffic at the token level, and force |
2376 | * synchronization before letting the status stage happen. |
2377 | * FIXME ignore tokens we'll NAK, until driver responds. |
2378 | * that'll mean a lot less irqs for some drivers. |
2379 | */ |
2380 | ep->is_in = (u.r.bRequestType & USB_DIR_IN) != 0; |
2381 | if (ep->is_in) { |
2382 | scratch = (1 << DATA_PACKET_TRANSMITTED_INTERRUPT) |
2383 | | (1 << DATA_OUT_PING_TOKEN_INTERRUPT) |
2384 | | (1 << DATA_IN_TOKEN_INTERRUPT); |
2385 | stop_out_naking (ep); |
2386 | } else |
2387 | scratch = (1 << DATA_PACKET_RECEIVED_INTERRUPT) |
2388 | | (1 << DATA_OUT_PING_TOKEN_INTERRUPT) |
2389 | | (1 << DATA_IN_TOKEN_INTERRUPT); |
2390 | writel (scratch, &dev->epregs [0].ep_irqenb); |
2391 | |
2392 | /* we made the hardware handle most lowlevel requests; |
2393 | * everything else goes uplevel to the gadget code. |
2394 | */ |
2395 | ep->responded = 1; |
2396 | switch (u.r.bRequest) { |
2397 | case USB_REQ_GET_STATUS: { |
2398 | struct net2280_ep *e; |
2399 | __le32 status; |
2400 | |
2401 | /* hw handles device and interface status */ |
2402 | if (u.r.bRequestType != (USB_DIR_IN|USB_RECIP_ENDPOINT)) |
2403 | goto delegate; |
2404 | if ((e = get_ep_by_addr (dev, w_index)) == 0 |
2405 | || w_length > 2) |
2406 | goto do_stall; |
2407 | |
2408 | if (readl (&e->regs->ep_rsp) |
2409 | & (1 << SET_ENDPOINT_HALT)) |
2410 | status = cpu_to_le32 (1); |
2411 | else |
2412 | status = cpu_to_le32 (0); |
2413 | |
2414 | /* don't bother with a request object! */ |
2415 | writel (0, &dev->epregs [0].ep_irqenb); |
2416 | set_fifo_bytecount (ep, w_length); |
2417 | writel ((__force u32)status, &dev->epregs [0].ep_data); |
2418 | allow_status (ep); |
2419 | VDEBUG (dev, "%s stat %02x\n", ep->ep.name, status); |
2420 | goto next_endpoints; |
2421 | } |
2422 | break; |
2423 | case USB_REQ_CLEAR_FEATURE: { |
2424 | struct net2280_ep *e; |
2425 | |
2426 | /* hw handles device features */ |
2427 | if (u.r.bRequestType != USB_RECIP_ENDPOINT) |
2428 | goto delegate; |
2429 | if (w_value != USB_ENDPOINT_HALT |
2430 | || w_length != 0) |
2431 | goto do_stall; |
2432 | if ((e = get_ep_by_addr (dev, w_index)) == 0) |
2433 | goto do_stall; |
2434 | if (e->wedged) { |
2435 | VDEBUG(dev, "%s wedged, halt not cleared\n", |
2436 | ep->ep.name); |
2437 | } else { |
2438 | VDEBUG(dev, "%s clear halt\n", ep->ep.name); |
2439 | clear_halt(e); |
2440 | } |
2441 | allow_status (ep); |
2442 | goto next_endpoints; |
2443 | } |
2444 | break; |
2445 | case USB_REQ_SET_FEATURE: { |
2446 | struct net2280_ep *e; |
2447 | |
2448 | /* hw handles device features */ |
2449 | if (u.r.bRequestType != USB_RECIP_ENDPOINT) |
2450 | goto delegate; |
2451 | if (w_value != USB_ENDPOINT_HALT |
2452 | || w_length != 0) |
2453 | goto do_stall; |
2454 | if ((e = get_ep_by_addr (dev, w_index)) == 0) |
2455 | goto do_stall; |
2456 | if (e->ep.name == ep0name) |
2457 | goto do_stall; |
2458 | set_halt (e); |
2459 | allow_status (ep); |
2460 | VDEBUG (dev, "%s set halt\n", ep->ep.name); |
2461 | goto next_endpoints; |
2462 | } |
2463 | break; |
2464 | default: |
2465 | delegate: |
2466 | VDEBUG (dev, "setup %02x.%02x v%04x i%04x l%04x " |
2467 | "ep_cfg %08x\n", |
2468 | u.r.bRequestType, u.r.bRequest, |
2469 | w_value, w_index, w_length, |
2470 | readl (&ep->regs->ep_cfg)); |
2471 | ep->responded = 0; |
2472 | spin_unlock (&dev->lock); |
2473 | tmp = dev->driver->setup (&dev->gadget, &u.r); |
2474 | spin_lock (&dev->lock); |
2475 | } |
2476 | |
2477 | /* stall ep0 on error */ |
2478 | if (tmp < 0) { |
2479 | do_stall: |
2480 | VDEBUG (dev, "req %02x.%02x protocol STALL; stat %d\n", |
2481 | u.r.bRequestType, u.r.bRequest, tmp); |
2482 | dev->protocol_stall = 1; |
2483 | } |
2484 | |
2485 | /* some in/out token irq should follow; maybe stall then. |
2486 | * driver must queue a request (even zlp) or halt ep0 |
2487 | * before the host times out. |
2488 | */ |
2489 | } |
2490 | |
2491 | #undef w_value |
2492 | #undef w_index |
2493 | #undef w_length |
2494 | |
2495 | next_endpoints: |
2496 | /* endpoint data irq ? */ |
2497 | scratch = stat & 0x7f; |
2498 | stat &= ~0x7f; |
2499 | for (num = 0; scratch; num++) { |
2500 | u32 t; |
2501 | |
2502 | /* do this endpoint's FIFO and queue need tending? */ |
2503 | t = 1 << num; |
2504 | if ((scratch & t) == 0) |
2505 | continue; |
2506 | scratch ^= t; |
2507 | |
2508 | ep = &dev->ep [num]; |
2509 | handle_ep_small (ep); |
2510 | } |
2511 | |
2512 | if (stat) |
2513 | DEBUG (dev, "unhandled irqstat0 %08x\n", stat); |
2514 | } |
2515 | |
2516 | #define DMA_INTERRUPTS ( \ |
2517 | (1 << DMA_D_INTERRUPT) \ |
2518 | | (1 << DMA_C_INTERRUPT) \ |
2519 | | (1 << DMA_B_INTERRUPT) \ |
2520 | | (1 << DMA_A_INTERRUPT)) |
2521 | #define PCI_ERROR_INTERRUPTS ( \ |
2522 | (1 << PCI_MASTER_ABORT_RECEIVED_INTERRUPT) \ |
2523 | | (1 << PCI_TARGET_ABORT_RECEIVED_INTERRUPT) \ |
2524 | | (1 << PCI_RETRY_ABORT_INTERRUPT)) |
2525 | |
2526 | static void handle_stat1_irqs (struct net2280 *dev, u32 stat) |
2527 | { |
2528 | struct net2280_ep *ep; |
2529 | u32 tmp, num, mask, scratch; |
2530 | |
2531 | /* after disconnect there's nothing else to do! */ |
2532 | tmp = (1 << VBUS_INTERRUPT) | (1 << ROOT_PORT_RESET_INTERRUPT); |
2533 | mask = (1 << HIGH_SPEED) | (1 << FULL_SPEED); |
2534 | |
2535 | /* VBUS disconnect is indicated by VBUS_PIN and VBUS_INTERRUPT set. |
2536 | * Root Port Reset is indicated by ROOT_PORT_RESET_INTERRRUPT set and |
2537 | * both HIGH_SPEED and FULL_SPEED clear (as ROOT_PORT_RESET_INTERRUPT |
2538 | * only indicates a change in the reset state). |
2539 | */ |
2540 | if (stat & tmp) { |
2541 | writel (tmp, &dev->regs->irqstat1); |
2542 | if ((((stat & (1 << ROOT_PORT_RESET_INTERRUPT)) |
2543 | && ((readl (&dev->usb->usbstat) & mask) |
2544 | == 0)) |
2545 | || ((readl (&dev->usb->usbctl) |
2546 | & (1 << VBUS_PIN)) == 0) |
2547 | ) && ( dev->gadget.speed != USB_SPEED_UNKNOWN)) { |
2548 | DEBUG (dev, "disconnect %s\n", |
2549 | dev->driver->driver.name); |
2550 | stop_activity (dev, dev->driver); |
2551 | ep0_start (dev); |
2552 | return; |
2553 | } |
2554 | stat &= ~tmp; |
2555 | |
2556 | /* vBUS can bounce ... one of many reasons to ignore the |
2557 | * notion of hotplug events on bus connect/disconnect! |
2558 | */ |
2559 | if (!stat) |
2560 | return; |
2561 | } |
2562 | |
2563 | /* NOTE: chip stays in PCI D0 state for now, but it could |
2564 | * enter D1 to save more power |
2565 | */ |
2566 | tmp = (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT); |
2567 | if (stat & tmp) { |
2568 | writel (tmp, &dev->regs->irqstat1); |
2569 | if (stat & (1 << SUSPEND_REQUEST_INTERRUPT)) { |
2570 | if (dev->driver->suspend) |
2571 | dev->driver->suspend (&dev->gadget); |
2572 | if (!enable_suspend) |
2573 | stat &= ~(1 << SUSPEND_REQUEST_INTERRUPT); |
2574 | } else { |
2575 | if (dev->driver->resume) |
2576 | dev->driver->resume (&dev->gadget); |
2577 | /* at high speed, note erratum 0133 */ |
2578 | } |
2579 | stat &= ~tmp; |
2580 | } |
2581 | |
2582 | /* clear any other status/irqs */ |
2583 | if (stat) |
2584 | writel (stat, &dev->regs->irqstat1); |
2585 | |
2586 | /* some status we can just ignore */ |
2587 | if (dev->pdev->device == 0x2280) |
2588 | stat &= ~((1 << CONTROL_STATUS_INTERRUPT) |
2589 | | (1 << SUSPEND_REQUEST_INTERRUPT) |
2590 | | (1 << RESUME_INTERRUPT) |
2591 | | (1 << SOF_INTERRUPT)); |
2592 | else |
2593 | stat &= ~((1 << CONTROL_STATUS_INTERRUPT) |
2594 | | (1 << RESUME_INTERRUPT) |
2595 | | (1 << SOF_DOWN_INTERRUPT) |
2596 | | (1 << SOF_INTERRUPT)); |
2597 | |
2598 | if (!stat) |
2599 | return; |
2600 | // DEBUG (dev, "irqstat1 %08x\n", stat); |
2601 | |
2602 | /* DMA status, for ep-{a,b,c,d} */ |
2603 | scratch = stat & DMA_INTERRUPTS; |
2604 | stat &= ~DMA_INTERRUPTS; |
2605 | scratch >>= 9; |
2606 | for (num = 0; scratch; num++) { |
2607 | struct net2280_dma_regs __iomem *dma; |
2608 | |
2609 | tmp = 1 << num; |
2610 | if ((tmp & scratch) == 0) |
2611 | continue; |
2612 | scratch ^= tmp; |
2613 | |
2614 | ep = &dev->ep [num + 1]; |
2615 | dma = ep->dma; |
2616 | |
2617 | if (!dma) |
2618 | continue; |
2619 | |
2620 | /* clear ep's dma status */ |
2621 | tmp = readl (&dma->dmastat); |
2622 | writel (tmp, &dma->dmastat); |
2623 | |
2624 | /* chaining should stop on abort, short OUT from fifo, |
2625 | * or (stat0 codepath) short OUT transfer. |
2626 | */ |
2627 | if (!use_dma_chaining) { |
2628 | if ((tmp & (1 << DMA_TRANSACTION_DONE_INTERRUPT)) |
2629 | == 0) { |
2630 | DEBUG (ep->dev, "%s no xact done? %08x\n", |
2631 | ep->ep.name, tmp); |
2632 | continue; |
2633 | } |
2634 | stop_dma (ep->dma); |
2635 | } |
2636 | |
2637 | /* OUT transfers terminate when the data from the |
2638 | * host is in our memory. Process whatever's done. |
2639 | * On this path, we know transfer's last packet wasn't |
2640 | * less than req->length. NAK_OUT_PACKETS may be set, |
2641 | * or the FIFO may already be holding new packets. |
2642 | * |
2643 | * IN transfers can linger in the FIFO for a very |
2644 | * long time ... we ignore that for now, accounting |
2645 | * precisely (like PIO does) needs per-packet irqs |
2646 | */ |
2647 | scan_dma_completions (ep); |
2648 | |
2649 | /* disable dma on inactive queues; else maybe restart */ |
2650 | if (list_empty (&ep->queue)) { |
2651 | if (use_dma_chaining) |
2652 | stop_dma (ep->dma); |
2653 | } else { |
2654 | tmp = readl (&dma->dmactl); |
2655 | if (!use_dma_chaining |
2656 | || (tmp & (1 << DMA_ENABLE)) == 0) |
2657 | restart_dma (ep); |
2658 | else if (ep->is_in && use_dma_chaining) { |
2659 | struct net2280_request *req; |
2660 | __le32 dmacount; |
2661 | |
2662 | /* the descriptor at the head of the chain |
2663 | * may still have VALID_BIT clear; that's |
2664 | * used to trigger changing DMA_FIFO_VALIDATE |
2665 | * (affects automagic zlp writes). |
2666 | */ |
2667 | req = list_entry (ep->queue.next, |
2668 | struct net2280_request, queue); |
2669 | dmacount = req->td->dmacount; |
2670 | dmacount &= cpu_to_le32 ( |
2671 | (1 << VALID_BIT) |
2672 | | DMA_BYTE_COUNT_MASK); |
2673 | if (dmacount && (dmacount & valid_bit) == 0) |
2674 | restart_dma (ep); |
2675 | } |
2676 | } |
2677 | ep->irqs++; |
2678 | } |
2679 | |
2680 | /* NOTE: there are other PCI errors we might usefully notice. |
2681 | * if they appear very often, here's where to try recovering. |
2682 | */ |
2683 | if (stat & PCI_ERROR_INTERRUPTS) { |
2684 | ERROR (dev, "pci dma error; stat %08x\n", stat); |
2685 | stat &= ~PCI_ERROR_INTERRUPTS; |
2686 | /* these are fatal errors, but "maybe" they won't |
2687 | * happen again ... |
2688 | */ |
2689 | stop_activity (dev, dev->driver); |
2690 | ep0_start (dev); |
2691 | stat = 0; |
2692 | } |
2693 | |
2694 | if (stat) |
2695 | DEBUG (dev, "unhandled irqstat1 %08x\n", stat); |
2696 | } |
2697 | |
2698 | static irqreturn_t net2280_irq (int irq, void *_dev) |
2699 | { |
2700 | struct net2280 *dev = _dev; |
2701 | |
2702 | /* shared interrupt, not ours */ |
2703 | if (!(readl(&dev->regs->irqstat0) & (1 << INTA_ASSERTED))) |
2704 | return IRQ_NONE; |
2705 | |
2706 | spin_lock (&dev->lock); |
2707 | |
2708 | /* handle disconnect, dma, and more */ |
2709 | handle_stat1_irqs (dev, readl (&dev->regs->irqstat1)); |
2710 | |
2711 | /* control requests and PIO */ |
2712 | handle_stat0_irqs (dev, readl (&dev->regs->irqstat0)); |
2713 | |
2714 | spin_unlock (&dev->lock); |
2715 | |
2716 | return IRQ_HANDLED; |
2717 | } |
2718 | |
2719 | /*-------------------------------------------------------------------------*/ |
2720 | |
2721 | static void gadget_release (struct device *_dev) |
2722 | { |
2723 | struct net2280 *dev = dev_get_drvdata (_dev); |
2724 | |
2725 | kfree (dev); |
2726 | } |
2727 | |
2728 | /* tear down the binding between this driver and the pci device */ |
2729 | |
2730 | static void net2280_remove (struct pci_dev *pdev) |
2731 | { |
2732 | struct net2280 *dev = pci_get_drvdata (pdev); |
2733 | |
2734 | BUG_ON(dev->driver); |
2735 | |
2736 | /* then clean up the resources we allocated during probe() */ |
2737 | net2280_led_shutdown (dev); |
2738 | if (dev->requests) { |
2739 | int i; |
2740 | for (i = 1; i < 5; i++) { |
2741 | if (!dev->ep [i].dummy) |
2742 | continue; |
2743 | pci_pool_free (dev->requests, dev->ep [i].dummy, |
2744 | dev->ep [i].td_dma); |
2745 | } |
2746 | pci_pool_destroy (dev->requests); |
2747 | } |
2748 | if (dev->got_irq) |
2749 | free_irq (pdev->irq, dev); |
2750 | if (dev->regs) |
2751 | iounmap (dev->regs); |
2752 | if (dev->region) |
2753 | release_mem_region (pci_resource_start (pdev, 0), |
2754 | pci_resource_len (pdev, 0)); |
2755 | if (dev->enabled) |
2756 | pci_disable_device (pdev); |
2757 | device_unregister (&dev->gadget.dev); |
2758 | device_remove_file (&pdev->dev, &dev_attr_registers); |
2759 | pci_set_drvdata (pdev, NULL); |
2760 | |
2761 | INFO (dev, "unbind\n"); |
2762 | |
2763 | the_controller = NULL; |
2764 | } |
2765 | |
2766 | /* wrap this driver around the specified device, but |
2767 | * don't respond over USB until a gadget driver binds to us. |
2768 | */ |
2769 | |
2770 | static int net2280_probe (struct pci_dev *pdev, const struct pci_device_id *id) |
2771 | { |
2772 | struct net2280 *dev; |
2773 | unsigned long resource, len; |
2774 | void __iomem *base = NULL; |
2775 | int retval, i; |
2776 | |
2777 | /* if you want to support more than one controller in a system, |
2778 | * usb_gadget_driver_{register,unregister}() must change. |
2779 | */ |
2780 | if (the_controller) { |
2781 | dev_warn (&pdev->dev, "ignoring\n"); |
2782 | return -EBUSY; |
2783 | } |
2784 | |
2785 | /* alloc, and start init */ |
2786 | dev = kzalloc (sizeof *dev, GFP_KERNEL); |
2787 | if (dev == NULL){ |
2788 | retval = -ENOMEM; |
2789 | goto done; |
2790 | } |
2791 | |
2792 | pci_set_drvdata (pdev, dev); |
2793 | spin_lock_init (&dev->lock); |
2794 | dev->pdev = pdev; |
2795 | dev->gadget.ops = &net2280_ops; |
2796 | dev->gadget.is_dualspeed = 1; |
2797 | |
2798 | /* the "gadget" abstracts/virtualizes the controller */ |
2799 | dev_set_name(&dev->gadget.dev, "gadget"); |
2800 | dev->gadget.dev.parent = &pdev->dev; |
2801 | dev->gadget.dev.dma_mask = pdev->dev.dma_mask; |
2802 | dev->gadget.dev.release = gadget_release; |
2803 | dev->gadget.name = driver_name; |
2804 | |
2805 | /* now all the pci goodies ... */ |
2806 | if (pci_enable_device (pdev) < 0) { |
2807 | retval = -ENODEV; |
2808 | goto done; |
2809 | } |
2810 | dev->enabled = 1; |
2811 | |
2812 | /* BAR 0 holds all the registers |
2813 | * BAR 1 is 8051 memory; unused here (note erratum 0103) |
2814 | * BAR 2 is fifo memory; unused here |
2815 | */ |
2816 | resource = pci_resource_start (pdev, 0); |
2817 | len = pci_resource_len (pdev, 0); |
2818 | if (!request_mem_region (resource, len, driver_name)) { |
2819 | DEBUG (dev, "controller already in use\n"); |
2820 | retval = -EBUSY; |
2821 | goto done; |
2822 | } |
2823 | dev->region = 1; |
2824 | |
2825 | /* FIXME provide firmware download interface to put |
2826 | * 8051 code into the chip, e.g. to turn on PCI PM. |
2827 | */ |
2828 | |
2829 | base = ioremap_nocache (resource, len); |
2830 | if (base == NULL) { |
2831 | DEBUG (dev, "can't map memory\n"); |
2832 | retval = -EFAULT; |
2833 | goto done; |
2834 | } |
2835 | dev->regs = (struct net2280_regs __iomem *) base; |
2836 | dev->usb = (struct net2280_usb_regs __iomem *) (base + 0x0080); |
2837 | dev->pci = (struct net2280_pci_regs __iomem *) (base + 0x0100); |
2838 | dev->dma = (struct net2280_dma_regs __iomem *) (base + 0x0180); |
2839 | dev->dep = (struct net2280_dep_regs __iomem *) (base + 0x0200); |
2840 | dev->epregs = (struct net2280_ep_regs __iomem *) (base + 0x0300); |
2841 | |
2842 | /* put into initial config, link up all endpoints */ |
2843 | writel (0, &dev->usb->usbctl); |
2844 | usb_reset (dev); |
2845 | usb_reinit (dev); |
2846 | |
2847 | /* irq setup after old hardware is cleaned up */ |
2848 | if (!pdev->irq) { |
2849 | ERROR (dev, "No IRQ. Check PCI setup!\n"); |
2850 | retval = -ENODEV; |
2851 | goto done; |
2852 | } |
2853 | |
2854 | if (request_irq (pdev->irq, net2280_irq, IRQF_SHARED, driver_name, dev) |
2855 | != 0) { |
2856 | ERROR (dev, "request interrupt %d failed\n", pdev->irq); |
2857 | retval = -EBUSY; |
2858 | goto done; |
2859 | } |
2860 | dev->got_irq = 1; |
2861 | |
2862 | /* DMA setup */ |
2863 | /* NOTE: we know only the 32 LSBs of dma addresses may be nonzero */ |
2864 | dev->requests = pci_pool_create ("requests", pdev, |
2865 | sizeof (struct net2280_dma), |
2866 | 0 /* no alignment requirements */, |
2867 | 0 /* or page-crossing issues */); |
2868 | if (!dev->requests) { |
2869 | DEBUG (dev, "can't get request pool\n"); |
2870 | retval = -ENOMEM; |
2871 | goto done; |
2872 | } |
2873 | for (i = 1; i < 5; i++) { |
2874 | struct net2280_dma *td; |
2875 | |
2876 | td = pci_pool_alloc (dev->requests, GFP_KERNEL, |
2877 | &dev->ep [i].td_dma); |
2878 | if (!td) { |
2879 | DEBUG (dev, "can't get dummy %d\n", i); |
2880 | retval = -ENOMEM; |
2881 | goto done; |
2882 | } |
2883 | td->dmacount = 0; /* not VALID */ |
2884 | td->dmaaddr = cpu_to_le32 (DMA_ADDR_INVALID); |
2885 | td->dmadesc = td->dmaaddr; |
2886 | dev->ep [i].dummy = td; |
2887 | } |
2888 | |
2889 | /* enable lower-overhead pci memory bursts during DMA */ |
2890 | writel ( (1 << DMA_MEMORY_WRITE_AND_INVALIDATE_ENABLE) |
2891 | // 256 write retries may not be enough... |
2892 | // | (1 << PCI_RETRY_ABORT_ENABLE) |
2893 | | (1 << DMA_READ_MULTIPLE_ENABLE) |
2894 | | (1 << DMA_READ_LINE_ENABLE) |
2895 | , &dev->pci->pcimstctl); |
2896 | /* erratum 0115 shouldn't appear: Linux inits PCI_LATENCY_TIMER */ |
2897 | pci_set_master (pdev); |
2898 | pci_try_set_mwi (pdev); |
2899 | |
2900 | /* ... also flushes any posted pci writes */ |
2901 | dev->chiprev = get_idx_reg (dev->regs, REG_CHIPREV) & 0xffff; |
2902 | |
2903 | /* done */ |
2904 | INFO (dev, "%s\n", driver_desc); |
2905 | INFO (dev, "irq %d, pci mem %p, chip rev %04x\n", |
2906 | pdev->irq, base, dev->chiprev); |
2907 | INFO (dev, "version: " DRIVER_VERSION "; dma %s\n", |
2908 | use_dma |
2909 | ? (use_dma_chaining ? "chaining" : "enabled") |
2910 | : "disabled"); |
2911 | the_controller = dev; |
2912 | |
2913 | retval = device_register (&dev->gadget.dev); |
2914 | if (retval) goto done; |
2915 | retval = device_create_file (&pdev->dev, &dev_attr_registers); |
2916 | if (retval) goto done; |
2917 | |
2918 | return 0; |
2919 | |
2920 | done: |
2921 | if (dev) |
2922 | net2280_remove (pdev); |
2923 | return retval; |
2924 | } |
2925 | |
2926 | /* make sure the board is quiescent; otherwise it will continue |
2927 | * generating IRQs across the upcoming reboot. |
2928 | */ |
2929 | |
2930 | static void net2280_shutdown (struct pci_dev *pdev) |
2931 | { |
2932 | struct net2280 *dev = pci_get_drvdata (pdev); |
2933 | |
2934 | /* disable IRQs */ |
2935 | writel (0, &dev->regs->pciirqenb0); |
2936 | writel (0, &dev->regs->pciirqenb1); |
2937 | |
2938 | /* disable the pullup so the host will think we're gone */ |
2939 | writel (0, &dev->usb->usbctl); |
2940 | } |
2941 | |
2942 | |
2943 | /*-------------------------------------------------------------------------*/ |
2944 | |
2945 | static const struct pci_device_id pci_ids [] = { { |
2946 | .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), |
2947 | .class_mask = ~0, |
2948 | .vendor = 0x17cc, |
2949 | .device = 0x2280, |
2950 | .subvendor = PCI_ANY_ID, |
2951 | .subdevice = PCI_ANY_ID, |
2952 | }, { |
2953 | .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), |
2954 | .class_mask = ~0, |
2955 | .vendor = 0x17cc, |
2956 | .device = 0x2282, |
2957 | .subvendor = PCI_ANY_ID, |
2958 | .subdevice = PCI_ANY_ID, |
2959 | |
2960 | }, { /* end: all zeroes */ } |
2961 | }; |
2962 | MODULE_DEVICE_TABLE (pci, pci_ids); |
2963 | |
2964 | /* pci driver glue; this is a "new style" PCI driver module */ |
2965 | static struct pci_driver net2280_pci_driver = { |
2966 | .name = (char *) driver_name, |
2967 | .id_table = pci_ids, |
2968 | |
2969 | .probe = net2280_probe, |
2970 | .remove = net2280_remove, |
2971 | .shutdown = net2280_shutdown, |
2972 | |
2973 | /* FIXME add power management support */ |
2974 | }; |
2975 | |
2976 | MODULE_DESCRIPTION (DRIVER_DESC); |
2977 | MODULE_AUTHOR ("David Brownell"); |
2978 | MODULE_LICENSE ("GPL"); |
2979 | |
2980 | static int __init init (void) |
2981 | { |
2982 | if (!use_dma) |
2983 | use_dma_chaining = 0; |
2984 | return pci_register_driver (&net2280_pci_driver); |
2985 | } |
2986 | module_init (init); |
2987 | |
2988 | static void __exit cleanup (void) |
2989 | { |
2990 | pci_unregister_driver (&net2280_pci_driver); |
2991 | } |
2992 | module_exit (cleanup); |
2993 |
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v2.6.34-rc5
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