Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Driver for the PLX NET2280 USB device controller. | |
3 | * Specs and errata are available from <http://www.plxtech.com>. | |
4 | * | |
901b3d75 | 5 | * PLX Technology Inc. (formerly NetChip Technology) supported the |
1da177e4 LT |
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 | * | |
901b3d75 DB |
29 | * Modified Seth Levy 2005 PLX Technology, Inc. to provide compatibility |
30 | * with 2282 chip | |
950ee4c8 | 31 | * |
1da177e4 LT |
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. | |
1da177e4 LT |
36 | */ |
37 | ||
38 | #undef DEBUG /* messages on error and most fault paths */ | |
39 | #undef VERBOSE /* extra debug messages (success too) */ | |
40 | ||
1da177e4 LT |
41 | #include <linux/module.h> |
42 | #include <linux/pci.h> | |
682d4c80 | 43 | #include <linux/dma-mapping.h> |
1da177e4 LT |
44 | #include <linux/kernel.h> |
45 | #include <linux/delay.h> | |
46 | #include <linux/ioport.h> | |
1da177e4 | 47 | #include <linux/slab.h> |
1da177e4 LT |
48 | #include <linux/errno.h> |
49 | #include <linux/init.h> | |
50 | #include <linux/timer.h> | |
51 | #include <linux/list.h> | |
52 | #include <linux/interrupt.h> | |
53 | #include <linux/moduleparam.h> | |
54 | #include <linux/device.h> | |
5f848137 | 55 | #include <linux/usb/ch9.h> |
9454a57a | 56 | #include <linux/usb/gadget.h> |
b38b03b3 | 57 | #include <linux/prefetch.h> |
1da177e4 LT |
58 | |
59 | #include <asm/byteorder.h> | |
60 | #include <asm/io.h> | |
61 | #include <asm/irq.h> | |
62 | #include <asm/system.h> | |
63 | #include <asm/unaligned.h> | |
64 | ||
65 | ||
950ee4c8 GL |
66 | #define DRIVER_DESC "PLX NET228x USB Peripheral Controller" |
67 | #define DRIVER_VERSION "2005 Sept 27" | |
1da177e4 LT |
68 | |
69 | #define DMA_ADDR_INVALID (~(dma_addr_t)0) | |
70 | #define EP_DONTUSE 13 /* nonzero */ | |
71 | ||
72 | #define USE_RDK_LEDS /* GPIO pins control three LEDs */ | |
73 | ||
74 | ||
75 | static const char driver_name [] = "net2280"; | |
76 | static const char driver_desc [] = DRIVER_DESC; | |
77 | ||
78 | static const char ep0name [] = "ep0"; | |
901b3d75 | 79 | static const char *const ep_name [] = { |
1da177e4 LT |
80 | ep0name, |
81 | "ep-a", "ep-b", "ep-c", "ep-d", | |
82 | "ep-e", "ep-f", | |
83 | }; | |
84 | ||
85 | /* use_dma -- general goodness, fewer interrupts, less cpu load (vs PIO) | |
86 | * use_dma_chaining -- dma descriptor queueing gives even more irq reduction | |
87 | * | |
88 | * The net2280 DMA engines are not tightly integrated with their FIFOs; | |
89 | * not all cases are (yet) handled well in this driver or the silicon. | |
90 | * Some gadget drivers work better with the dma support here than others. | |
91 | * These two parameters let you use PIO or more aggressive DMA. | |
92 | */ | |
93 | static int use_dma = 1; | |
94 | static int use_dma_chaining = 0; | |
95 | ||
96 | /* "modprobe net2280 use_dma=n" etc */ | |
97 | module_param (use_dma, bool, S_IRUGO); | |
98 | module_param (use_dma_chaining, bool, S_IRUGO); | |
99 | ||
100 | ||
101 | /* mode 0 == ep-{a,b,c,d} 1K fifo each | |
102 | * mode 1 == ep-{a,b} 2K fifo each, ep-{c,d} unavailable | |
103 | * mode 2 == ep-a 2K fifo, ep-{b,c} 1K each, ep-d unavailable | |
104 | */ | |
105 | static ushort fifo_mode = 0; | |
106 | ||
107 | /* "modprobe net2280 fifo_mode=1" etc */ | |
108 | module_param (fifo_mode, ushort, 0644); | |
109 | ||
110 | /* enable_suspend -- When enabled, the driver will respond to | |
111 | * USB suspend requests by powering down the NET2280. Otherwise, | |
25985edc | 112 | * USB suspend requests will be ignored. This is acceptable for |
950ee4c8 | 113 | * self-powered devices |
1da177e4 LT |
114 | */ |
115 | static int enable_suspend = 0; | |
116 | ||
117 | /* "modprobe net2280 enable_suspend=1" etc */ | |
118 | module_param (enable_suspend, bool, S_IRUGO); | |
119 | ||
120 | ||
121 | #define DIR_STRING(bAddress) (((bAddress) & USB_DIR_IN) ? "in" : "out") | |
122 | ||
123 | #if defined(CONFIG_USB_GADGET_DEBUG_FILES) || defined (DEBUG) | |
124 | static char *type_string (u8 bmAttributes) | |
125 | { | |
126 | switch ((bmAttributes) & USB_ENDPOINT_XFERTYPE_MASK) { | |
127 | case USB_ENDPOINT_XFER_BULK: return "bulk"; | |
128 | case USB_ENDPOINT_XFER_ISOC: return "iso"; | |
129 | case USB_ENDPOINT_XFER_INT: return "intr"; | |
130 | }; | |
131 | return "control"; | |
132 | } | |
133 | #endif | |
134 | ||
135 | #include "net2280.h" | |
136 | ||
551509d2 HH |
137 | #define valid_bit cpu_to_le32 (1 << VALID_BIT) |
138 | #define dma_done_ie cpu_to_le32 (1 << DMA_DONE_INTERRUPT_ENABLE) | |
1da177e4 LT |
139 | |
140 | /*-------------------------------------------------------------------------*/ | |
141 | ||
142 | static int | |
143 | net2280_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) | |
144 | { | |
145 | struct net2280 *dev; | |
146 | struct net2280_ep *ep; | |
147 | u32 max, tmp; | |
148 | unsigned long flags; | |
149 | ||
150 | ep = container_of (_ep, struct net2280_ep, ep); | |
151 | if (!_ep || !desc || ep->desc || _ep->name == ep0name | |
152 | || desc->bDescriptorType != USB_DT_ENDPOINT) | |
153 | return -EINVAL; | |
154 | dev = ep->dev; | |
155 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) | |
156 | return -ESHUTDOWN; | |
157 | ||
158 | /* erratum 0119 workaround ties up an endpoint number */ | |
159 | if ((desc->bEndpointAddress & 0x0f) == EP_DONTUSE) | |
160 | return -EDOM; | |
161 | ||
162 | /* sanity check ep-e/ep-f since their fifos are small */ | |
29cc8897 | 163 | max = usb_endpoint_maxp (desc) & 0x1fff; |
1da177e4 LT |
164 | if (ep->num > 4 && max > 64) |
165 | return -ERANGE; | |
166 | ||
167 | spin_lock_irqsave (&dev->lock, flags); | |
168 | _ep->maxpacket = max & 0x7ff; | |
169 | ep->desc = desc; | |
170 | ||
171 | /* ep_reset() has already been called */ | |
172 | ep->stopped = 0; | |
8066134f | 173 | ep->wedged = 0; |
1da177e4 LT |
174 | ep->out_overflow = 0; |
175 | ||
176 | /* set speed-dependent max packet; may kick in high bandwidth */ | |
177 | set_idx_reg (dev->regs, REG_EP_MAXPKT (dev, ep->num), max); | |
178 | ||
179 | /* FIFO lines can't go to different packets. PIO is ok, so | |
180 | * use it instead of troublesome (non-bulk) multi-packet DMA. | |
181 | */ | |
182 | if (ep->dma && (max % 4) != 0 && use_dma_chaining) { | |
183 | DEBUG (ep->dev, "%s, no dma for maxpacket %d\n", | |
184 | ep->ep.name, ep->ep.maxpacket); | |
185 | ep->dma = NULL; | |
186 | } | |
187 | ||
188 | /* set type, direction, address; reset fifo counters */ | |
189 | writel ((1 << FIFO_FLUSH), &ep->regs->ep_stat); | |
190 | tmp = (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK); | |
191 | if (tmp == USB_ENDPOINT_XFER_INT) { | |
192 | /* erratum 0105 workaround prevents hs NYET */ | |
193 | if (dev->chiprev == 0100 | |
194 | && dev->gadget.speed == USB_SPEED_HIGH | |
195 | && !(desc->bEndpointAddress & USB_DIR_IN)) | |
196 | writel ((1 << CLEAR_NAK_OUT_PACKETS_MODE), | |
197 | &ep->regs->ep_rsp); | |
198 | } else if (tmp == USB_ENDPOINT_XFER_BULK) { | |
199 | /* catch some particularly blatant driver bugs */ | |
200 | if ((dev->gadget.speed == USB_SPEED_HIGH | |
201 | && max != 512) | |
202 | || (dev->gadget.speed == USB_SPEED_FULL | |
203 | && max > 64)) { | |
204 | spin_unlock_irqrestore (&dev->lock, flags); | |
205 | return -ERANGE; | |
206 | } | |
207 | } | |
208 | ep->is_iso = (tmp == USB_ENDPOINT_XFER_ISOC) ? 1 : 0; | |
209 | tmp <<= ENDPOINT_TYPE; | |
210 | tmp |= desc->bEndpointAddress; | |
211 | tmp |= (4 << ENDPOINT_BYTE_COUNT); /* default full fifo lines */ | |
212 | tmp |= 1 << ENDPOINT_ENABLE; | |
213 | wmb (); | |
214 | ||
215 | /* for OUT transfers, block the rx fifo until a read is posted */ | |
216 | ep->is_in = (tmp & USB_DIR_IN) != 0; | |
217 | if (!ep->is_in) | |
218 | writel ((1 << SET_NAK_OUT_PACKETS), &ep->regs->ep_rsp); | |
950ee4c8 | 219 | else if (dev->pdev->device != 0x2280) { |
901b3d75 DB |
220 | /* Added for 2282, Don't use nak packets on an in endpoint, |
221 | * this was ignored on 2280 | |
222 | */ | |
950ee4c8 GL |
223 | writel ((1 << CLEAR_NAK_OUT_PACKETS) |
224 | | (1 << CLEAR_NAK_OUT_PACKETS_MODE), &ep->regs->ep_rsp); | |
225 | } | |
1da177e4 LT |
226 | |
227 | writel (tmp, &ep->regs->ep_cfg); | |
228 | ||
229 | /* enable irqs */ | |
230 | if (!ep->dma) { /* pio, per-packet */ | |
231 | tmp = (1 << ep->num) | readl (&dev->regs->pciirqenb0); | |
232 | writel (tmp, &dev->regs->pciirqenb0); | |
233 | ||
234 | tmp = (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE) | |
950ee4c8 GL |
235 | | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE); |
236 | if (dev->pdev->device == 0x2280) | |
237 | tmp |= readl (&ep->regs->ep_irqenb); | |
1da177e4 LT |
238 | writel (tmp, &ep->regs->ep_irqenb); |
239 | } else { /* dma, per-request */ | |
240 | tmp = (1 << (8 + ep->num)); /* completion */ | |
241 | tmp |= readl (&dev->regs->pciirqenb1); | |
242 | writel (tmp, &dev->regs->pciirqenb1); | |
243 | ||
244 | /* for short OUT transfers, dma completions can't | |
245 | * advance the queue; do it pio-style, by hand. | |
246 | * NOTE erratum 0112 workaround #2 | |
247 | */ | |
248 | if ((desc->bEndpointAddress & USB_DIR_IN) == 0) { | |
249 | tmp = (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT_ENABLE); | |
250 | writel (tmp, &ep->regs->ep_irqenb); | |
251 | ||
252 | tmp = (1 << ep->num) | readl (&dev->regs->pciirqenb0); | |
253 | writel (tmp, &dev->regs->pciirqenb0); | |
254 | } | |
255 | } | |
256 | ||
257 | tmp = desc->bEndpointAddress; | |
258 | DEBUG (dev, "enabled %s (ep%d%s-%s) %s max %04x\n", | |
259 | _ep->name, tmp & 0x0f, DIR_STRING (tmp), | |
260 | type_string (desc->bmAttributes), | |
261 | ep->dma ? "dma" : "pio", max); | |
262 | ||
263 | /* pci writes may still be posted */ | |
264 | spin_unlock_irqrestore (&dev->lock, flags); | |
265 | return 0; | |
266 | } | |
267 | ||
268 | static int handshake (u32 __iomem *ptr, u32 mask, u32 done, int usec) | |
269 | { | |
270 | u32 result; | |
271 | ||
272 | do { | |
273 | result = readl (ptr); | |
274 | if (result == ~(u32)0) /* "device unplugged" */ | |
275 | return -ENODEV; | |
276 | result &= mask; | |
277 | if (result == done) | |
278 | return 0; | |
279 | udelay (1); | |
280 | usec--; | |
281 | } while (usec > 0); | |
282 | return -ETIMEDOUT; | |
283 | } | |
284 | ||
901b3d75 | 285 | static const struct usb_ep_ops net2280_ep_ops; |
1da177e4 LT |
286 | |
287 | static void ep_reset (struct net2280_regs __iomem *regs, struct net2280_ep *ep) | |
288 | { | |
289 | u32 tmp; | |
290 | ||
291 | ep->desc = NULL; | |
292 | INIT_LIST_HEAD (&ep->queue); | |
293 | ||
294 | ep->ep.maxpacket = ~0; | |
295 | ep->ep.ops = &net2280_ep_ops; | |
296 | ||
297 | /* disable the dma, irqs, endpoint... */ | |
298 | if (ep->dma) { | |
299 | writel (0, &ep->dma->dmactl); | |
300 | writel ( (1 << DMA_SCATTER_GATHER_DONE_INTERRUPT) | |
301 | | (1 << DMA_TRANSACTION_DONE_INTERRUPT) | |
302 | | (1 << DMA_ABORT) | |
303 | , &ep->dma->dmastat); | |
304 | ||
305 | tmp = readl (®s->pciirqenb0); | |
306 | tmp &= ~(1 << ep->num); | |
307 | writel (tmp, ®s->pciirqenb0); | |
308 | } else { | |
309 | tmp = readl (®s->pciirqenb1); | |
310 | tmp &= ~(1 << (8 + ep->num)); /* completion */ | |
311 | writel (tmp, ®s->pciirqenb1); | |
312 | } | |
313 | writel (0, &ep->regs->ep_irqenb); | |
314 | ||
315 | /* init to our chosen defaults, notably so that we NAK OUT | |
316 | * packets until the driver queues a read (+note erratum 0112) | |
317 | */ | |
950ee4c8 GL |
318 | if (!ep->is_in || ep->dev->pdev->device == 0x2280) { |
319 | tmp = (1 << SET_NAK_OUT_PACKETS_MODE) | |
1da177e4 LT |
320 | | (1 << SET_NAK_OUT_PACKETS) |
321 | | (1 << CLEAR_EP_HIDE_STATUS_PHASE) | |
322 | | (1 << CLEAR_INTERRUPT_MODE); | |
950ee4c8 GL |
323 | } else { |
324 | /* added for 2282 */ | |
325 | tmp = (1 << CLEAR_NAK_OUT_PACKETS_MODE) | |
326 | | (1 << CLEAR_NAK_OUT_PACKETS) | |
327 | | (1 << CLEAR_EP_HIDE_STATUS_PHASE) | |
328 | | (1 << CLEAR_INTERRUPT_MODE); | |
329 | } | |
1da177e4 LT |
330 | |
331 | if (ep->num != 0) { | |
332 | tmp |= (1 << CLEAR_ENDPOINT_TOGGLE) | |
333 | | (1 << CLEAR_ENDPOINT_HALT); | |
334 | } | |
335 | writel (tmp, &ep->regs->ep_rsp); | |
336 | ||
337 | /* scrub most status bits, and flush any fifo state */ | |
950ee4c8 GL |
338 | if (ep->dev->pdev->device == 0x2280) |
339 | tmp = (1 << FIFO_OVERFLOW) | |
340 | | (1 << FIFO_UNDERFLOW); | |
341 | else | |
342 | tmp = 0; | |
343 | ||
344 | writel (tmp | (1 << TIMEOUT) | |
1da177e4 LT |
345 | | (1 << USB_STALL_SENT) |
346 | | (1 << USB_IN_NAK_SENT) | |
347 | | (1 << USB_IN_ACK_RCVD) | |
348 | | (1 << USB_OUT_PING_NAK_SENT) | |
349 | | (1 << USB_OUT_ACK_SENT) | |
1da177e4 LT |
350 | | (1 << FIFO_FLUSH) |
351 | | (1 << SHORT_PACKET_OUT_DONE_INTERRUPT) | |
352 | | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT) | |
353 | | (1 << DATA_PACKET_RECEIVED_INTERRUPT) | |
354 | | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT) | |
355 | | (1 << DATA_OUT_PING_TOKEN_INTERRUPT) | |
356 | | (1 << DATA_IN_TOKEN_INTERRUPT) | |
357 | , &ep->regs->ep_stat); | |
358 | ||
359 | /* fifo size is handled separately */ | |
360 | } | |
361 | ||
362 | static void nuke (struct net2280_ep *); | |
363 | ||
364 | static int net2280_disable (struct usb_ep *_ep) | |
365 | { | |
366 | struct net2280_ep *ep; | |
367 | unsigned long flags; | |
368 | ||
369 | ep = container_of (_ep, struct net2280_ep, ep); | |
370 | if (!_ep || !ep->desc || _ep->name == ep0name) | |
371 | return -EINVAL; | |
372 | ||
373 | spin_lock_irqsave (&ep->dev->lock, flags); | |
374 | nuke (ep); | |
375 | ep_reset (ep->dev->regs, ep); | |
376 | ||
377 | VDEBUG (ep->dev, "disabled %s %s\n", | |
378 | ep->dma ? "dma" : "pio", _ep->name); | |
379 | ||
380 | /* synch memory views with the device */ | |
381 | (void) readl (&ep->regs->ep_cfg); | |
382 | ||
383 | if (use_dma && !ep->dma && ep->num >= 1 && ep->num <= 4) | |
384 | ep->dma = &ep->dev->dma [ep->num - 1]; | |
385 | ||
386 | spin_unlock_irqrestore (&ep->dev->lock, flags); | |
387 | return 0; | |
388 | } | |
389 | ||
390 | /*-------------------------------------------------------------------------*/ | |
391 | ||
392 | static struct usb_request * | |
55016f10 | 393 | net2280_alloc_request (struct usb_ep *_ep, gfp_t gfp_flags) |
1da177e4 LT |
394 | { |
395 | struct net2280_ep *ep; | |
396 | struct net2280_request *req; | |
397 | ||
398 | if (!_ep) | |
399 | return NULL; | |
400 | ep = container_of (_ep, struct net2280_ep, ep); | |
401 | ||
7039f422 | 402 | req = kzalloc(sizeof(*req), gfp_flags); |
1da177e4 LT |
403 | if (!req) |
404 | return NULL; | |
405 | ||
1da177e4 LT |
406 | req->req.dma = DMA_ADDR_INVALID; |
407 | INIT_LIST_HEAD (&req->queue); | |
408 | ||
409 | /* this dma descriptor may be swapped with the previous dummy */ | |
410 | if (ep->dma) { | |
411 | struct net2280_dma *td; | |
412 | ||
413 | td = pci_pool_alloc (ep->dev->requests, gfp_flags, | |
414 | &req->td_dma); | |
415 | if (!td) { | |
416 | kfree (req); | |
417 | return NULL; | |
418 | } | |
419 | td->dmacount = 0; /* not VALID */ | |
551509d2 | 420 | td->dmaaddr = cpu_to_le32 (DMA_ADDR_INVALID); |
1da177e4 LT |
421 | td->dmadesc = td->dmaaddr; |
422 | req->td = td; | |
423 | } | |
424 | return &req->req; | |
425 | } | |
426 | ||
427 | static void | |
428 | net2280_free_request (struct usb_ep *_ep, struct usb_request *_req) | |
429 | { | |
430 | struct net2280_ep *ep; | |
431 | struct net2280_request *req; | |
432 | ||
433 | ep = container_of (_ep, struct net2280_ep, ep); | |
434 | if (!_ep || !_req) | |
435 | return; | |
436 | ||
437 | req = container_of (_req, struct net2280_request, req); | |
438 | WARN_ON (!list_empty (&req->queue)); | |
439 | if (req->td) | |
440 | pci_pool_free (ep->dev->requests, req->td, req->td_dma); | |
441 | kfree (req); | |
442 | } | |
443 | ||
444 | /*-------------------------------------------------------------------------*/ | |
445 | ||
1da177e4 LT |
446 | /* load a packet into the fifo we use for usb IN transfers. |
447 | * works for all endpoints. | |
448 | * | |
449 | * NOTE: pio with ep-a..ep-d could stuff multiple packets into the fifo | |
450 | * at a time, but this code is simpler because it knows it only writes | |
451 | * one packet. ep-a..ep-d should use dma instead. | |
452 | */ | |
453 | static void | |
454 | write_fifo (struct net2280_ep *ep, struct usb_request *req) | |
455 | { | |
456 | struct net2280_ep_regs __iomem *regs = ep->regs; | |
457 | u8 *buf; | |
458 | u32 tmp; | |
459 | unsigned count, total; | |
460 | ||
461 | /* INVARIANT: fifo is currently empty. (testable) */ | |
462 | ||
463 | if (req) { | |
464 | buf = req->buf + req->actual; | |
465 | prefetch (buf); | |
466 | total = req->length - req->actual; | |
467 | } else { | |
468 | total = 0; | |
469 | buf = NULL; | |
470 | } | |
471 | ||
472 | /* write just one packet at a time */ | |
473 | count = ep->ep.maxpacket; | |
474 | if (count > total) /* min() cannot be used on a bitfield */ | |
475 | count = total; | |
476 | ||
477 | VDEBUG (ep->dev, "write %s fifo (IN) %d bytes%s req %p\n", | |
478 | ep->ep.name, count, | |
479 | (count != ep->ep.maxpacket) ? " (short)" : "", | |
480 | req); | |
481 | while (count >= 4) { | |
482 | /* NOTE be careful if you try to align these. fifo lines | |
483 | * should normally be full (4 bytes) and successive partial | |
484 | * lines are ok only in certain cases. | |
485 | */ | |
486 | tmp = get_unaligned ((u32 *)buf); | |
487 | cpu_to_le32s (&tmp); | |
488 | writel (tmp, ®s->ep_data); | |
489 | buf += 4; | |
490 | count -= 4; | |
491 | } | |
492 | ||
493 | /* last fifo entry is "short" unless we wrote a full packet. | |
494 | * also explicitly validate last word in (periodic) transfers | |
495 | * when maxpacket is not a multiple of 4 bytes. | |
496 | */ | |
497 | if (count || total < ep->ep.maxpacket) { | |
498 | tmp = count ? get_unaligned ((u32 *)buf) : count; | |
499 | cpu_to_le32s (&tmp); | |
500 | set_fifo_bytecount (ep, count & 0x03); | |
501 | writel (tmp, ®s->ep_data); | |
502 | } | |
503 | ||
504 | /* pci writes may still be posted */ | |
505 | } | |
506 | ||
507 | /* work around erratum 0106: PCI and USB race over the OUT fifo. | |
508 | * caller guarantees chiprev 0100, out endpoint is NAKing, and | |
509 | * there's no real data in the fifo. | |
510 | * | |
511 | * NOTE: also used in cases where that erratum doesn't apply: | |
512 | * where the host wrote "too much" data to us. | |
513 | */ | |
514 | static void out_flush (struct net2280_ep *ep) | |
515 | { | |
516 | u32 __iomem *statp; | |
517 | u32 tmp; | |
518 | ||
519 | ASSERT_OUT_NAKING (ep); | |
520 | ||
521 | statp = &ep->regs->ep_stat; | |
522 | writel ( (1 << DATA_OUT_PING_TOKEN_INTERRUPT) | |
523 | | (1 << DATA_PACKET_RECEIVED_INTERRUPT) | |
524 | , statp); | |
525 | writel ((1 << FIFO_FLUSH), statp); | |
526 | mb (); | |
527 | tmp = readl (statp); | |
528 | if (tmp & (1 << DATA_OUT_PING_TOKEN_INTERRUPT) | |
529 | /* high speed did bulk NYET; fifo isn't filling */ | |
530 | && ep->dev->gadget.speed == USB_SPEED_FULL) { | |
531 | unsigned usec; | |
532 | ||
533 | usec = 50; /* 64 byte bulk/interrupt */ | |
534 | handshake (statp, (1 << USB_OUT_PING_NAK_SENT), | |
535 | (1 << USB_OUT_PING_NAK_SENT), usec); | |
536 | /* NAK done; now CLEAR_NAK_OUT_PACKETS is safe */ | |
537 | } | |
538 | } | |
539 | ||
540 | /* unload packet(s) from the fifo we use for usb OUT transfers. | |
541 | * returns true iff the request completed, because of short packet | |
542 | * or the request buffer having filled with full packets. | |
543 | * | |
544 | * for ep-a..ep-d this will read multiple packets out when they | |
545 | * have been accepted. | |
546 | */ | |
547 | static int | |
548 | read_fifo (struct net2280_ep *ep, struct net2280_request *req) | |
549 | { | |
550 | struct net2280_ep_regs __iomem *regs = ep->regs; | |
551 | u8 *buf = req->req.buf + req->req.actual; | |
552 | unsigned count, tmp, is_short; | |
553 | unsigned cleanup = 0, prevent = 0; | |
554 | ||
555 | /* erratum 0106 ... packets coming in during fifo reads might | |
556 | * be incompletely rejected. not all cases have workarounds. | |
557 | */ | |
558 | if (ep->dev->chiprev == 0x0100 | |
559 | && ep->dev->gadget.speed == USB_SPEED_FULL) { | |
560 | udelay (1); | |
561 | tmp = readl (&ep->regs->ep_stat); | |
562 | if ((tmp & (1 << NAK_OUT_PACKETS))) | |
563 | cleanup = 1; | |
564 | else if ((tmp & (1 << FIFO_FULL))) { | |
565 | start_out_naking (ep); | |
566 | prevent = 1; | |
567 | } | |
568 | /* else: hope we don't see the problem */ | |
569 | } | |
570 | ||
571 | /* never overflow the rx buffer. the fifo reads packets until | |
572 | * it sees a short one; we might not be ready for them all. | |
573 | */ | |
574 | prefetchw (buf); | |
575 | count = readl (®s->ep_avail); | |
576 | if (unlikely (count == 0)) { | |
577 | udelay (1); | |
578 | tmp = readl (&ep->regs->ep_stat); | |
579 | count = readl (®s->ep_avail); | |
580 | /* handled that data already? */ | |
581 | if (count == 0 && (tmp & (1 << NAK_OUT_PACKETS)) == 0) | |
582 | return 0; | |
583 | } | |
584 | ||
585 | tmp = req->req.length - req->req.actual; | |
586 | if (count > tmp) { | |
587 | /* as with DMA, data overflow gets flushed */ | |
588 | if ((tmp % ep->ep.maxpacket) != 0) { | |
589 | ERROR (ep->dev, | |
590 | "%s out fifo %d bytes, expected %d\n", | |
591 | ep->ep.name, count, tmp); | |
592 | req->req.status = -EOVERFLOW; | |
593 | cleanup = 1; | |
594 | /* NAK_OUT_PACKETS will be set, so flushing is safe; | |
595 | * the next read will start with the next packet | |
596 | */ | |
597 | } /* else it's a ZLP, no worries */ | |
598 | count = tmp; | |
599 | } | |
600 | req->req.actual += count; | |
601 | ||
602 | is_short = (count == 0) || ((count % ep->ep.maxpacket) != 0); | |
603 | ||
604 | VDEBUG (ep->dev, "read %s fifo (OUT) %d bytes%s%s%s req %p %d/%d\n", | |
605 | ep->ep.name, count, is_short ? " (short)" : "", | |
606 | cleanup ? " flush" : "", prevent ? " nak" : "", | |
607 | req, req->req.actual, req->req.length); | |
608 | ||
609 | while (count >= 4) { | |
610 | tmp = readl (®s->ep_data); | |
611 | cpu_to_le32s (&tmp); | |
612 | put_unaligned (tmp, (u32 *)buf); | |
613 | buf += 4; | |
614 | count -= 4; | |
615 | } | |
616 | if (count) { | |
617 | tmp = readl (®s->ep_data); | |
618 | /* LE conversion is implicit here: */ | |
619 | do { | |
620 | *buf++ = (u8) tmp; | |
621 | tmp >>= 8; | |
622 | } while (--count); | |
623 | } | |
624 | if (cleanup) | |
625 | out_flush (ep); | |
626 | if (prevent) { | |
627 | writel ((1 << CLEAR_NAK_OUT_PACKETS), &ep->regs->ep_rsp); | |
628 | (void) readl (&ep->regs->ep_rsp); | |
629 | } | |
630 | ||
631 | return is_short || ((req->req.actual == req->req.length) | |
632 | && !req->req.zero); | |
633 | } | |
634 | ||
635 | /* fill out dma descriptor to match a given request */ | |
636 | static void | |
637 | fill_dma_desc (struct net2280_ep *ep, struct net2280_request *req, int valid) | |
638 | { | |
639 | struct net2280_dma *td = req->td; | |
640 | u32 dmacount = req->req.length; | |
641 | ||
642 | /* don't let DMA continue after a short OUT packet, | |
643 | * so overruns can't affect the next transfer. | |
644 | * in case of overruns on max-size packets, we can't | |
645 | * stop the fifo from filling but we can flush it. | |
646 | */ | |
647 | if (ep->is_in) | |
648 | dmacount |= (1 << DMA_DIRECTION); | |
901b3d75 DB |
649 | if ((!ep->is_in && (dmacount % ep->ep.maxpacket) != 0) |
650 | || ep->dev->pdev->device != 0x2280) | |
1da177e4 LT |
651 | dmacount |= (1 << END_OF_CHAIN); |
652 | ||
653 | req->valid = valid; | |
654 | if (valid) | |
655 | dmacount |= (1 << VALID_BIT); | |
656 | if (likely(!req->req.no_interrupt || !use_dma_chaining)) | |
657 | dmacount |= (1 << DMA_DONE_INTERRUPT_ENABLE); | |
658 | ||
659 | /* td->dmadesc = previously set by caller */ | |
660 | td->dmaaddr = cpu_to_le32 (req->req.dma); | |
661 | ||
662 | /* 2280 may be polling VALID_BIT through ep->dma->dmadesc */ | |
663 | wmb (); | |
da2bbdcc | 664 | td->dmacount = cpu_to_le32(dmacount); |
1da177e4 LT |
665 | } |
666 | ||
667 | static const u32 dmactl_default = | |
668 | (1 << DMA_SCATTER_GATHER_DONE_INTERRUPT) | |
669 | | (1 << DMA_CLEAR_COUNT_ENABLE) | |
670 | /* erratum 0116 workaround part 1 (use POLLING) */ | |
671 | | (POLL_100_USEC << DESCRIPTOR_POLLING_RATE) | |
672 | | (1 << DMA_VALID_BIT_POLLING_ENABLE) | |
673 | | (1 << DMA_VALID_BIT_ENABLE) | |
674 | | (1 << DMA_SCATTER_GATHER_ENABLE) | |
675 | /* erratum 0116 workaround part 2 (no AUTOSTART) */ | |
676 | | (1 << DMA_ENABLE); | |
677 | ||
678 | static inline void spin_stop_dma (struct net2280_dma_regs __iomem *dma) | |
679 | { | |
680 | handshake (&dma->dmactl, (1 << DMA_ENABLE), 0, 50); | |
681 | } | |
682 | ||
683 | static inline void stop_dma (struct net2280_dma_regs __iomem *dma) | |
684 | { | |
685 | writel (readl (&dma->dmactl) & ~(1 << DMA_ENABLE), &dma->dmactl); | |
686 | spin_stop_dma (dma); | |
687 | } | |
688 | ||
689 | static void start_queue (struct net2280_ep *ep, u32 dmactl, u32 td_dma) | |
690 | { | |
691 | struct net2280_dma_regs __iomem *dma = ep->dma; | |
950ee4c8 | 692 | unsigned int tmp = (1 << VALID_BIT) | (ep->is_in << DMA_DIRECTION); |
1da177e4 | 693 | |
950ee4c8 GL |
694 | if (ep->dev->pdev->device != 0x2280) |
695 | tmp |= (1 << END_OF_CHAIN); | |
696 | ||
697 | writel (tmp, &dma->dmacount); | |
1da177e4 LT |
698 | writel (readl (&dma->dmastat), &dma->dmastat); |
699 | ||
700 | writel (td_dma, &dma->dmadesc); | |
701 | writel (dmactl, &dma->dmactl); | |
702 | ||
703 | /* erratum 0116 workaround part 3: pci arbiter away from net2280 */ | |
704 | (void) readl (&ep->dev->pci->pcimstctl); | |
705 | ||
706 | writel ((1 << DMA_START), &dma->dmastat); | |
707 | ||
708 | if (!ep->is_in) | |
709 | stop_out_naking (ep); | |
710 | } | |
711 | ||
712 | static void start_dma (struct net2280_ep *ep, struct net2280_request *req) | |
713 | { | |
714 | u32 tmp; | |
715 | struct net2280_dma_regs __iomem *dma = ep->dma; | |
716 | ||
717 | /* FIXME can't use DMA for ZLPs */ | |
718 | ||
719 | /* on this path we "know" there's no dma active (yet) */ | |
720 | WARN_ON (readl (&dma->dmactl) & (1 << DMA_ENABLE)); | |
721 | writel (0, &ep->dma->dmactl); | |
722 | ||
723 | /* previous OUT packet might have been short */ | |
724 | if (!ep->is_in && ((tmp = readl (&ep->regs->ep_stat)) | |
901b3d75 | 725 | & (1 << NAK_OUT_PACKETS)) != 0) { |
1da177e4 LT |
726 | writel ((1 << SHORT_PACKET_TRANSFERRED_INTERRUPT), |
727 | &ep->regs->ep_stat); | |
728 | ||
729 | tmp = readl (&ep->regs->ep_avail); | |
730 | if (tmp) { | |
731 | writel (readl (&dma->dmastat), &dma->dmastat); | |
732 | ||
733 | /* transfer all/some fifo data */ | |
734 | writel (req->req.dma, &dma->dmaaddr); | |
735 | tmp = min (tmp, req->req.length); | |
736 | ||
737 | /* dma irq, faking scatterlist status */ | |
738 | req->td->dmacount = cpu_to_le32 (req->req.length - tmp); | |
739 | writel ((1 << DMA_DONE_INTERRUPT_ENABLE) | |
740 | | tmp, &dma->dmacount); | |
741 | req->td->dmadesc = 0; | |
742 | req->valid = 1; | |
743 | ||
744 | writel ((1 << DMA_ENABLE), &dma->dmactl); | |
745 | writel ((1 << DMA_START), &dma->dmastat); | |
746 | return; | |
747 | } | |
748 | } | |
749 | ||
750 | tmp = dmactl_default; | |
751 | ||
752 | /* force packet boundaries between dma requests, but prevent the | |
753 | * controller from automagically writing a last "short" packet | |
754 | * (zero length) unless the driver explicitly said to do that. | |
755 | */ | |
756 | if (ep->is_in) { | |
757 | if (likely ((req->req.length % ep->ep.maxpacket) != 0 | |
758 | || req->req.zero)) { | |
759 | tmp |= (1 << DMA_FIFO_VALIDATE); | |
760 | ep->in_fifo_validate = 1; | |
761 | } else | |
762 | ep->in_fifo_validate = 0; | |
763 | } | |
764 | ||
765 | /* init req->td, pointing to the current dummy */ | |
766 | req->td->dmadesc = cpu_to_le32 (ep->td_dma); | |
767 | fill_dma_desc (ep, req, 1); | |
768 | ||
769 | if (!use_dma_chaining) | |
551509d2 | 770 | req->td->dmacount |= cpu_to_le32 (1 << END_OF_CHAIN); |
1da177e4 LT |
771 | |
772 | start_queue (ep, tmp, req->td_dma); | |
773 | } | |
774 | ||
775 | static inline void | |
776 | queue_dma (struct net2280_ep *ep, struct net2280_request *req, int valid) | |
777 | { | |
778 | struct net2280_dma *end; | |
779 | dma_addr_t tmp; | |
780 | ||
781 | /* swap new dummy for old, link; fill and maybe activate */ | |
782 | end = ep->dummy; | |
783 | ep->dummy = req->td; | |
784 | req->td = end; | |
785 | ||
786 | tmp = ep->td_dma; | |
787 | ep->td_dma = req->td_dma; | |
788 | req->td_dma = tmp; | |
789 | ||
790 | end->dmadesc = cpu_to_le32 (ep->td_dma); | |
791 | ||
792 | fill_dma_desc (ep, req, valid); | |
793 | } | |
794 | ||
795 | static void | |
796 | done (struct net2280_ep *ep, struct net2280_request *req, int status) | |
797 | { | |
798 | struct net2280 *dev; | |
799 | unsigned stopped = ep->stopped; | |
800 | ||
801 | list_del_init (&req->queue); | |
802 | ||
803 | if (req->req.status == -EINPROGRESS) | |
804 | req->req.status = status; | |
805 | else | |
806 | status = req->req.status; | |
807 | ||
808 | dev = ep->dev; | |
809 | if (req->mapped) { | |
810 | pci_unmap_single (dev->pdev, req->req.dma, req->req.length, | |
811 | ep->is_in ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); | |
812 | req->req.dma = DMA_ADDR_INVALID; | |
813 | req->mapped = 0; | |
814 | } | |
815 | ||
816 | if (status && status != -ESHUTDOWN) | |
817 | VDEBUG (dev, "complete %s req %p stat %d len %u/%u\n", | |
818 | ep->ep.name, &req->req, status, | |
819 | req->req.actual, req->req.length); | |
820 | ||
821 | /* don't modify queue heads during completion callback */ | |
822 | ep->stopped = 1; | |
823 | spin_unlock (&dev->lock); | |
824 | req->req.complete (&ep->ep, &req->req); | |
825 | spin_lock (&dev->lock); | |
826 | ep->stopped = stopped; | |
827 | } | |
828 | ||
829 | /*-------------------------------------------------------------------------*/ | |
830 | ||
831 | static int | |
55016f10 | 832 | net2280_queue (struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) |
1da177e4 LT |
833 | { |
834 | struct net2280_request *req; | |
835 | struct net2280_ep *ep; | |
836 | struct net2280 *dev; | |
837 | unsigned long flags; | |
838 | ||
839 | /* we always require a cpu-view buffer, so that we can | |
840 | * always use pio (as fallback or whatever). | |
841 | */ | |
842 | req = container_of (_req, struct net2280_request, req); | |
843 | if (!_req || !_req->complete || !_req->buf | |
844 | || !list_empty (&req->queue)) | |
845 | return -EINVAL; | |
846 | if (_req->length > (~0 & DMA_BYTE_COUNT_MASK)) | |
847 | return -EDOM; | |
848 | ep = container_of (_ep, struct net2280_ep, ep); | |
849 | if (!_ep || (!ep->desc && ep->num != 0)) | |
850 | return -EINVAL; | |
851 | dev = ep->dev; | |
852 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) | |
853 | return -ESHUTDOWN; | |
854 | ||
855 | /* FIXME implement PIO fallback for ZLPs with DMA */ | |
856 | if (ep->dma && _req->length == 0) | |
857 | return -EOPNOTSUPP; | |
858 | ||
859 | /* set up dma mapping in case the caller didn't */ | |
860 | if (ep->dma && _req->dma == DMA_ADDR_INVALID) { | |
861 | _req->dma = pci_map_single (dev->pdev, _req->buf, _req->length, | |
862 | ep->is_in ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); | |
863 | req->mapped = 1; | |
864 | } | |
865 | ||
866 | #if 0 | |
867 | VDEBUG (dev, "%s queue req %p, len %d buf %p\n", | |
868 | _ep->name, _req, _req->length, _req->buf); | |
869 | #endif | |
870 | ||
871 | spin_lock_irqsave (&dev->lock, flags); | |
872 | ||
873 | _req->status = -EINPROGRESS; | |
874 | _req->actual = 0; | |
875 | ||
876 | /* kickstart this i/o queue? */ | |
877 | if (list_empty (&ep->queue) && !ep->stopped) { | |
878 | /* use DMA if the endpoint supports it, else pio */ | |
879 | if (ep->dma) | |
880 | start_dma (ep, req); | |
881 | else { | |
882 | /* maybe there's no control data, just status ack */ | |
883 | if (ep->num == 0 && _req->length == 0) { | |
884 | allow_status (ep); | |
885 | done (ep, req, 0); | |
886 | VDEBUG (dev, "%s status ack\n", ep->ep.name); | |
887 | goto done; | |
888 | } | |
889 | ||
890 | /* PIO ... stuff the fifo, or unblock it. */ | |
891 | if (ep->is_in) | |
892 | write_fifo (ep, _req); | |
893 | else if (list_empty (&ep->queue)) { | |
894 | u32 s; | |
895 | ||
896 | /* OUT FIFO might have packet(s) buffered */ | |
897 | s = readl (&ep->regs->ep_stat); | |
898 | if ((s & (1 << FIFO_EMPTY)) == 0) { | |
899 | /* note: _req->short_not_ok is | |
900 | * ignored here since PIO _always_ | |
901 | * stops queue advance here, and | |
902 | * _req->status doesn't change for | |
903 | * short reads (only _req->actual) | |
904 | */ | |
905 | if (read_fifo (ep, req)) { | |
906 | done (ep, req, 0); | |
907 | if (ep->num == 0) | |
908 | allow_status (ep); | |
909 | /* don't queue it */ | |
910 | req = NULL; | |
911 | } else | |
912 | s = readl (&ep->regs->ep_stat); | |
913 | } | |
914 | ||
915 | /* don't NAK, let the fifo fill */ | |
916 | if (req && (s & (1 << NAK_OUT_PACKETS))) | |
917 | writel ((1 << CLEAR_NAK_OUT_PACKETS), | |
918 | &ep->regs->ep_rsp); | |
919 | } | |
920 | } | |
921 | ||
922 | } else if (ep->dma) { | |
923 | int valid = 1; | |
924 | ||
925 | if (ep->is_in) { | |
926 | int expect; | |
927 | ||
928 | /* preventing magic zlps is per-engine state, not | |
929 | * per-transfer; irq logic must recover hiccups. | |
930 | */ | |
931 | expect = likely (req->req.zero | |
932 | || (req->req.length % ep->ep.maxpacket) != 0); | |
933 | if (expect != ep->in_fifo_validate) | |
934 | valid = 0; | |
935 | } | |
936 | queue_dma (ep, req, valid); | |
937 | ||
938 | } /* else the irq handler advances the queue. */ | |
939 | ||
1f26e28d | 940 | ep->responded = 1; |
1da177e4 LT |
941 | if (req) |
942 | list_add_tail (&req->queue, &ep->queue); | |
943 | done: | |
944 | spin_unlock_irqrestore (&dev->lock, flags); | |
945 | ||
946 | /* pci writes may still be posted */ | |
947 | return 0; | |
948 | } | |
949 | ||
950 | static inline void | |
951 | dma_done ( | |
952 | struct net2280_ep *ep, | |
953 | struct net2280_request *req, | |
954 | u32 dmacount, | |
955 | int status | |
956 | ) | |
957 | { | |
958 | req->req.actual = req->req.length - (DMA_BYTE_COUNT_MASK & dmacount); | |
959 | done (ep, req, status); | |
960 | } | |
961 | ||
962 | static void restart_dma (struct net2280_ep *ep); | |
963 | ||
964 | static void scan_dma_completions (struct net2280_ep *ep) | |
965 | { | |
966 | /* only look at descriptors that were "naturally" retired, | |
967 | * so fifo and list head state won't matter | |
968 | */ | |
969 | while (!list_empty (&ep->queue)) { | |
970 | struct net2280_request *req; | |
971 | u32 tmp; | |
972 | ||
973 | req = list_entry (ep->queue.next, | |
974 | struct net2280_request, queue); | |
975 | if (!req->valid) | |
976 | break; | |
977 | rmb (); | |
978 | tmp = le32_to_cpup (&req->td->dmacount); | |
979 | if ((tmp & (1 << VALID_BIT)) != 0) | |
980 | break; | |
981 | ||
982 | /* SHORT_PACKET_TRANSFERRED_INTERRUPT handles "usb-short" | |
983 | * cases where DMA must be aborted; this code handles | |
984 | * all non-abort DMA completions. | |
985 | */ | |
986 | if (unlikely (req->td->dmadesc == 0)) { | |
987 | /* paranoia */ | |
988 | tmp = readl (&ep->dma->dmacount); | |
989 | if (tmp & DMA_BYTE_COUNT_MASK) | |
990 | break; | |
991 | /* single transfer mode */ | |
992 | dma_done (ep, req, tmp, 0); | |
993 | break; | |
994 | } else if (!ep->is_in | |
995 | && (req->req.length % ep->ep.maxpacket) != 0) { | |
996 | tmp = readl (&ep->regs->ep_stat); | |
997 | ||
998 | /* AVOID TROUBLE HERE by not issuing short reads from | |
999 | * your gadget driver. That helps avoids errata 0121, | |
1000 | * 0122, and 0124; not all cases trigger the warning. | |
1001 | */ | |
1002 | if ((tmp & (1 << NAK_OUT_PACKETS)) == 0) { | |
b6c63937 | 1003 | WARNING (ep->dev, "%s lost packet sync!\n", |
1da177e4 LT |
1004 | ep->ep.name); |
1005 | req->req.status = -EOVERFLOW; | |
1006 | } else if ((tmp = readl (&ep->regs->ep_avail)) != 0) { | |
1007 | /* fifo gets flushed later */ | |
1008 | ep->out_overflow = 1; | |
1009 | DEBUG (ep->dev, "%s dma, discard %d len %d\n", | |
1010 | ep->ep.name, tmp, | |
1011 | req->req.length); | |
1012 | req->req.status = -EOVERFLOW; | |
1013 | } | |
1014 | } | |
1015 | dma_done (ep, req, tmp, 0); | |
1016 | } | |
1017 | } | |
1018 | ||
1019 | static void restart_dma (struct net2280_ep *ep) | |
1020 | { | |
1021 | struct net2280_request *req; | |
1022 | u32 dmactl = dmactl_default; | |
1023 | ||
1024 | if (ep->stopped) | |
1025 | return; | |
1026 | req = list_entry (ep->queue.next, struct net2280_request, queue); | |
1027 | ||
1028 | if (!use_dma_chaining) { | |
1029 | start_dma (ep, req); | |
1030 | return; | |
1031 | } | |
1032 | ||
1033 | /* the 2280 will be processing the queue unless queue hiccups after | |
1034 | * the previous transfer: | |
1035 | * IN: wanted automagic zlp, head doesn't (or vice versa) | |
1036 | * DMA_FIFO_VALIDATE doesn't init from dma descriptors. | |
1037 | * OUT: was "usb-short", we must restart. | |
1038 | */ | |
1039 | if (ep->is_in && !req->valid) { | |
1040 | struct net2280_request *entry, *prev = NULL; | |
1041 | int reqmode, done = 0; | |
1042 | ||
1043 | DEBUG (ep->dev, "%s dma hiccup td %p\n", ep->ep.name, req->td); | |
1044 | ep->in_fifo_validate = likely (req->req.zero | |
1045 | || (req->req.length % ep->ep.maxpacket) != 0); | |
1046 | if (ep->in_fifo_validate) | |
1047 | dmactl |= (1 << DMA_FIFO_VALIDATE); | |
1048 | list_for_each_entry (entry, &ep->queue, queue) { | |
320f3459 | 1049 | __le32 dmacount; |
1da177e4 LT |
1050 | |
1051 | if (entry == req) | |
1052 | continue; | |
1053 | dmacount = entry->td->dmacount; | |
1054 | if (!done) { | |
1055 | reqmode = likely (entry->req.zero | |
1056 | || (entry->req.length | |
1057 | % ep->ep.maxpacket) != 0); | |
1058 | if (reqmode == ep->in_fifo_validate) { | |
1059 | entry->valid = 1; | |
1060 | dmacount |= valid_bit; | |
1061 | entry->td->dmacount = dmacount; | |
1062 | prev = entry; | |
1063 | continue; | |
1064 | } else { | |
1065 | /* force a hiccup */ | |
1066 | prev->td->dmacount |= dma_done_ie; | |
1067 | done = 1; | |
1068 | } | |
1069 | } | |
1070 | ||
1071 | /* walk the rest of the queue so unlinks behave */ | |
1072 | entry->valid = 0; | |
1073 | dmacount &= ~valid_bit; | |
1074 | entry->td->dmacount = dmacount; | |
1075 | prev = entry; | |
1076 | } | |
1077 | } | |
1078 | ||
1079 | writel (0, &ep->dma->dmactl); | |
1080 | start_queue (ep, dmactl, req->td_dma); | |
1081 | } | |
1082 | ||
1083 | static void abort_dma (struct net2280_ep *ep) | |
1084 | { | |
1085 | /* abort the current transfer */ | |
1086 | if (likely (!list_empty (&ep->queue))) { | |
1087 | /* FIXME work around errata 0121, 0122, 0124 */ | |
1088 | writel ((1 << DMA_ABORT), &ep->dma->dmastat); | |
1089 | spin_stop_dma (ep->dma); | |
1090 | } else | |
1091 | stop_dma (ep->dma); | |
1092 | scan_dma_completions (ep); | |
1093 | } | |
1094 | ||
1095 | /* dequeue ALL requests */ | |
1096 | static void nuke (struct net2280_ep *ep) | |
1097 | { | |
1098 | struct net2280_request *req; | |
1099 | ||
1100 | /* called with spinlock held */ | |
1101 | ep->stopped = 1; | |
1102 | if (ep->dma) | |
1103 | abort_dma (ep); | |
1104 | while (!list_empty (&ep->queue)) { | |
1105 | req = list_entry (ep->queue.next, | |
1106 | struct net2280_request, | |
1107 | queue); | |
1108 | done (ep, req, -ESHUTDOWN); | |
1109 | } | |
1110 | } | |
1111 | ||
1112 | /* dequeue JUST ONE request */ | |
1113 | static int net2280_dequeue (struct usb_ep *_ep, struct usb_request *_req) | |
1114 | { | |
1115 | struct net2280_ep *ep; | |
1116 | struct net2280_request *req; | |
1117 | unsigned long flags; | |
1118 | u32 dmactl; | |
1119 | int stopped; | |
1120 | ||
1121 | ep = container_of (_ep, struct net2280_ep, ep); | |
1122 | if (!_ep || (!ep->desc && ep->num != 0) || !_req) | |
1123 | return -EINVAL; | |
1124 | ||
1125 | spin_lock_irqsave (&ep->dev->lock, flags); | |
1126 | stopped = ep->stopped; | |
1127 | ||
1128 | /* quiesce dma while we patch the queue */ | |
1129 | dmactl = 0; | |
1130 | ep->stopped = 1; | |
1131 | if (ep->dma) { | |
1132 | dmactl = readl (&ep->dma->dmactl); | |
1133 | /* WARNING erratum 0127 may kick in ... */ | |
1134 | stop_dma (ep->dma); | |
1135 | scan_dma_completions (ep); | |
1136 | } | |
1137 | ||
1138 | /* make sure it's still queued on this endpoint */ | |
1139 | list_for_each_entry (req, &ep->queue, queue) { | |
1140 | if (&req->req == _req) | |
1141 | break; | |
1142 | } | |
1143 | if (&req->req != _req) { | |
1144 | spin_unlock_irqrestore (&ep->dev->lock, flags); | |
1145 | return -EINVAL; | |
1146 | } | |
1147 | ||
1148 | /* queue head may be partially complete. */ | |
1149 | if (ep->queue.next == &req->queue) { | |
1150 | if (ep->dma) { | |
1151 | DEBUG (ep->dev, "unlink (%s) dma\n", _ep->name); | |
1152 | _req->status = -ECONNRESET; | |
1153 | abort_dma (ep); | |
1154 | if (likely (ep->queue.next == &req->queue)) { | |
1155 | // NOTE: misreports single-transfer mode | |
1156 | req->td->dmacount = 0; /* invalidate */ | |
1157 | dma_done (ep, req, | |
1158 | readl (&ep->dma->dmacount), | |
1159 | -ECONNRESET); | |
1160 | } | |
1161 | } else { | |
1162 | DEBUG (ep->dev, "unlink (%s) pio\n", _ep->name); | |
1163 | done (ep, req, -ECONNRESET); | |
1164 | } | |
1165 | req = NULL; | |
1166 | ||
1167 | /* patch up hardware chaining data */ | |
1168 | } else if (ep->dma && use_dma_chaining) { | |
1169 | if (req->queue.prev == ep->queue.next) { | |
1170 | writel (le32_to_cpu (req->td->dmadesc), | |
1171 | &ep->dma->dmadesc); | |
1172 | if (req->td->dmacount & dma_done_ie) | |
1173 | writel (readl (&ep->dma->dmacount) | |
320f3459 | 1174 | | le32_to_cpu(dma_done_ie), |
1da177e4 LT |
1175 | &ep->dma->dmacount); |
1176 | } else { | |
1177 | struct net2280_request *prev; | |
1178 | ||
1179 | prev = list_entry (req->queue.prev, | |
1180 | struct net2280_request, queue); | |
1181 | prev->td->dmadesc = req->td->dmadesc; | |
1182 | if (req->td->dmacount & dma_done_ie) | |
1183 | prev->td->dmacount |= dma_done_ie; | |
1184 | } | |
1185 | } | |
1186 | ||
1187 | if (req) | |
1188 | done (ep, req, -ECONNRESET); | |
1189 | ep->stopped = stopped; | |
1190 | ||
1191 | if (ep->dma) { | |
1192 | /* turn off dma on inactive queues */ | |
1193 | if (list_empty (&ep->queue)) | |
1194 | stop_dma (ep->dma); | |
1195 | else if (!ep->stopped) { | |
1196 | /* resume current request, or start new one */ | |
1197 | if (req) | |
1198 | writel (dmactl, &ep->dma->dmactl); | |
1199 | else | |
1200 | start_dma (ep, list_entry (ep->queue.next, | |
1201 | struct net2280_request, queue)); | |
1202 | } | |
1203 | } | |
1204 | ||
1205 | spin_unlock_irqrestore (&ep->dev->lock, flags); | |
1206 | return 0; | |
1207 | } | |
1208 | ||
1209 | /*-------------------------------------------------------------------------*/ | |
1210 | ||
1211 | static int net2280_fifo_status (struct usb_ep *_ep); | |
1212 | ||
1213 | static int | |
8066134f | 1214 | net2280_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged) |
1da177e4 LT |
1215 | { |
1216 | struct net2280_ep *ep; | |
1217 | unsigned long flags; | |
1218 | int retval = 0; | |
1219 | ||
1220 | ep = container_of (_ep, struct net2280_ep, ep); | |
1221 | if (!_ep || (!ep->desc && ep->num != 0)) | |
1222 | return -EINVAL; | |
1223 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1224 | return -ESHUTDOWN; | |
1225 | if (ep->desc /* not ep0 */ && (ep->desc->bmAttributes & 0x03) | |
1226 | == USB_ENDPOINT_XFER_ISOC) | |
1227 | return -EINVAL; | |
1228 | ||
1229 | spin_lock_irqsave (&ep->dev->lock, flags); | |
1230 | if (!list_empty (&ep->queue)) | |
1231 | retval = -EAGAIN; | |
1232 | else if (ep->is_in && value && net2280_fifo_status (_ep) != 0) | |
1233 | retval = -EAGAIN; | |
1234 | else { | |
8066134f AS |
1235 | VDEBUG (ep->dev, "%s %s %s\n", _ep->name, |
1236 | value ? "set" : "clear", | |
1237 | wedged ? "wedge" : "halt"); | |
1da177e4 LT |
1238 | /* set/clear, then synch memory views with the device */ |
1239 | if (value) { | |
1240 | if (ep->num == 0) | |
1241 | ep->dev->protocol_stall = 1; | |
1242 | else | |
1243 | set_halt (ep); | |
8066134f AS |
1244 | if (wedged) |
1245 | ep->wedged = 1; | |
1246 | } else { | |
1da177e4 | 1247 | clear_halt (ep); |
8066134f AS |
1248 | ep->wedged = 0; |
1249 | } | |
1da177e4 LT |
1250 | (void) readl (&ep->regs->ep_rsp); |
1251 | } | |
1252 | spin_unlock_irqrestore (&ep->dev->lock, flags); | |
1253 | ||
1254 | return retval; | |
1255 | } | |
1256 | ||
8066134f AS |
1257 | static int |
1258 | net2280_set_halt(struct usb_ep *_ep, int value) | |
1259 | { | |
1260 | return net2280_set_halt_and_wedge(_ep, value, 0); | |
1261 | } | |
1262 | ||
1263 | static int | |
1264 | net2280_set_wedge(struct usb_ep *_ep) | |
1265 | { | |
1266 | if (!_ep || _ep->name == ep0name) | |
1267 | return -EINVAL; | |
1268 | return net2280_set_halt_and_wedge(_ep, 1, 1); | |
1269 | } | |
1270 | ||
1da177e4 LT |
1271 | static int |
1272 | net2280_fifo_status (struct usb_ep *_ep) | |
1273 | { | |
1274 | struct net2280_ep *ep; | |
1275 | u32 avail; | |
1276 | ||
1277 | ep = container_of (_ep, struct net2280_ep, ep); | |
1278 | if (!_ep || (!ep->desc && ep->num != 0)) | |
1279 | return -ENODEV; | |
1280 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1281 | return -ESHUTDOWN; | |
1282 | ||
1283 | avail = readl (&ep->regs->ep_avail) & ((1 << 12) - 1); | |
1284 | if (avail > ep->fifo_size) | |
1285 | return -EOVERFLOW; | |
1286 | if (ep->is_in) | |
1287 | avail = ep->fifo_size - avail; | |
1288 | return avail; | |
1289 | } | |
1290 | ||
1291 | static void | |
1292 | net2280_fifo_flush (struct usb_ep *_ep) | |
1293 | { | |
1294 | struct net2280_ep *ep; | |
1295 | ||
1296 | ep = container_of (_ep, struct net2280_ep, ep); | |
1297 | if (!_ep || (!ep->desc && ep->num != 0)) | |
1298 | return; | |
1299 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1300 | return; | |
1301 | ||
1302 | writel ((1 << FIFO_FLUSH), &ep->regs->ep_stat); | |
1303 | (void) readl (&ep->regs->ep_rsp); | |
1304 | } | |
1305 | ||
901b3d75 | 1306 | static const struct usb_ep_ops net2280_ep_ops = { |
1da177e4 LT |
1307 | .enable = net2280_enable, |
1308 | .disable = net2280_disable, | |
1309 | ||
1310 | .alloc_request = net2280_alloc_request, | |
1311 | .free_request = net2280_free_request, | |
1312 | ||
1da177e4 LT |
1313 | .queue = net2280_queue, |
1314 | .dequeue = net2280_dequeue, | |
1315 | ||
1316 | .set_halt = net2280_set_halt, | |
8066134f | 1317 | .set_wedge = net2280_set_wedge, |
1da177e4 LT |
1318 | .fifo_status = net2280_fifo_status, |
1319 | .fifo_flush = net2280_fifo_flush, | |
1320 | }; | |
1321 | ||
1322 | /*-------------------------------------------------------------------------*/ | |
1323 | ||
1324 | static int net2280_get_frame (struct usb_gadget *_gadget) | |
1325 | { | |
1326 | struct net2280 *dev; | |
1327 | unsigned long flags; | |
1328 | u16 retval; | |
1329 | ||
1330 | if (!_gadget) | |
1331 | return -ENODEV; | |
1332 | dev = container_of (_gadget, struct net2280, gadget); | |
1333 | spin_lock_irqsave (&dev->lock, flags); | |
1334 | retval = get_idx_reg (dev->regs, REG_FRAME) & 0x03ff; | |
1335 | spin_unlock_irqrestore (&dev->lock, flags); | |
1336 | return retval; | |
1337 | } | |
1338 | ||
1339 | static int net2280_wakeup (struct usb_gadget *_gadget) | |
1340 | { | |
1341 | struct net2280 *dev; | |
1342 | u32 tmp; | |
1343 | unsigned long flags; | |
1344 | ||
1345 | if (!_gadget) | |
1346 | return 0; | |
1347 | dev = container_of (_gadget, struct net2280, gadget); | |
1348 | ||
1349 | spin_lock_irqsave (&dev->lock, flags); | |
1350 | tmp = readl (&dev->usb->usbctl); | |
1351 | if (tmp & (1 << DEVICE_REMOTE_WAKEUP_ENABLE)) | |
1352 | writel (1 << GENERATE_RESUME, &dev->usb->usbstat); | |
1353 | spin_unlock_irqrestore (&dev->lock, flags); | |
1354 | ||
1355 | /* pci writes may still be posted */ | |
1356 | return 0; | |
1357 | } | |
1358 | ||
1359 | static int net2280_set_selfpowered (struct usb_gadget *_gadget, int value) | |
1360 | { | |
1361 | struct net2280 *dev; | |
1362 | u32 tmp; | |
1363 | unsigned long flags; | |
1364 | ||
1365 | if (!_gadget) | |
1366 | return 0; | |
1367 | dev = container_of (_gadget, struct net2280, gadget); | |
1368 | ||
1369 | spin_lock_irqsave (&dev->lock, flags); | |
1370 | tmp = readl (&dev->usb->usbctl); | |
1371 | if (value) | |
1372 | tmp |= (1 << SELF_POWERED_STATUS); | |
1373 | else | |
1374 | tmp &= ~(1 << SELF_POWERED_STATUS); | |
1375 | writel (tmp, &dev->usb->usbctl); | |
1376 | spin_unlock_irqrestore (&dev->lock, flags); | |
1377 | ||
1378 | return 0; | |
1379 | } | |
1380 | ||
1381 | static int net2280_pullup(struct usb_gadget *_gadget, int is_on) | |
1382 | { | |
1383 | struct net2280 *dev; | |
1384 | u32 tmp; | |
1385 | unsigned long flags; | |
1386 | ||
1387 | if (!_gadget) | |
1388 | return -ENODEV; | |
1389 | dev = container_of (_gadget, struct net2280, gadget); | |
1390 | ||
1391 | spin_lock_irqsave (&dev->lock, flags); | |
1392 | tmp = readl (&dev->usb->usbctl); | |
1393 | dev->softconnect = (is_on != 0); | |
1394 | if (is_on) | |
1395 | tmp |= (1 << USB_DETECT_ENABLE); | |
1396 | else | |
1397 | tmp &= ~(1 << USB_DETECT_ENABLE); | |
1398 | writel (tmp, &dev->usb->usbctl); | |
1399 | spin_unlock_irqrestore (&dev->lock, flags); | |
1400 | ||
1401 | return 0; | |
1402 | } | |
1403 | ||
4cf5e00b FB |
1404 | static int net2280_start(struct usb_gadget *_gadget, |
1405 | struct usb_gadget_driver *driver); | |
1406 | static int net2280_stop(struct usb_gadget *_gadget, | |
1407 | struct usb_gadget_driver *driver); | |
0f91349b | 1408 | |
1da177e4 LT |
1409 | static const struct usb_gadget_ops net2280_ops = { |
1410 | .get_frame = net2280_get_frame, | |
1411 | .wakeup = net2280_wakeup, | |
1412 | .set_selfpowered = net2280_set_selfpowered, | |
1413 | .pullup = net2280_pullup, | |
4cf5e00b FB |
1414 | .udc_start = net2280_start, |
1415 | .udc_stop = net2280_stop, | |
1da177e4 LT |
1416 | }; |
1417 | ||
1418 | /*-------------------------------------------------------------------------*/ | |
1419 | ||
1420 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
1421 | ||
1422 | /* FIXME move these into procfs, and use seq_file. | |
1423 | * Sysfs _still_ doesn't behave for arbitrarily sized files, | |
1424 | * and also doesn't help products using this with 2.4 kernels. | |
1425 | */ | |
1426 | ||
1427 | /* "function" sysfs attribute */ | |
1428 | static ssize_t | |
10523b3b | 1429 | show_function (struct device *_dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1430 | { |
1431 | struct net2280 *dev = dev_get_drvdata (_dev); | |
1432 | ||
1433 | if (!dev->driver | |
1434 | || !dev->driver->function | |
1435 | || strlen (dev->driver->function) > PAGE_SIZE) | |
1436 | return 0; | |
1437 | return scnprintf (buf, PAGE_SIZE, "%s\n", dev->driver->function); | |
1438 | } | |
1439 | static DEVICE_ATTR (function, S_IRUGO, show_function, NULL); | |
1440 | ||
62fb44b9 DH |
1441 | static ssize_t net2280_show_registers(struct device *_dev, |
1442 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
1443 | { |
1444 | struct net2280 *dev; | |
1445 | char *next; | |
1446 | unsigned size, t; | |
1447 | unsigned long flags; | |
1448 | int i; | |
1449 | u32 t1, t2; | |
30e69598 | 1450 | const char *s; |
1da177e4 LT |
1451 | |
1452 | dev = dev_get_drvdata (_dev); | |
1453 | next = buf; | |
1454 | size = PAGE_SIZE; | |
1455 | spin_lock_irqsave (&dev->lock, flags); | |
1456 | ||
1457 | if (dev->driver) | |
1458 | s = dev->driver->driver.name; | |
1459 | else | |
1460 | s = "(none)"; | |
1461 | ||
1462 | /* Main Control Registers */ | |
1463 | t = scnprintf (next, size, "%s version " DRIVER_VERSION | |
1464 | ", chiprev %04x, dma %s\n\n" | |
1465 | "devinit %03x fifoctl %08x gadget '%s'\n" | |
1466 | "pci irqenb0 %02x irqenb1 %08x " | |
1467 | "irqstat0 %04x irqstat1 %08x\n", | |
1468 | driver_name, dev->chiprev, | |
1469 | use_dma | |
1470 | ? (use_dma_chaining ? "chaining" : "enabled") | |
1471 | : "disabled", | |
1472 | readl (&dev->regs->devinit), | |
1473 | readl (&dev->regs->fifoctl), | |
1474 | s, | |
1475 | readl (&dev->regs->pciirqenb0), | |
1476 | readl (&dev->regs->pciirqenb1), | |
1477 | readl (&dev->regs->irqstat0), | |
1478 | readl (&dev->regs->irqstat1)); | |
1479 | size -= t; | |
1480 | next += t; | |
1481 | ||
1482 | /* USB Control Registers */ | |
1483 | t1 = readl (&dev->usb->usbctl); | |
1484 | t2 = readl (&dev->usb->usbstat); | |
1485 | if (t1 & (1 << VBUS_PIN)) { | |
1486 | if (t2 & (1 << HIGH_SPEED)) | |
1487 | s = "high speed"; | |
1488 | else if (dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1489 | s = "powered"; | |
1490 | else | |
1491 | s = "full speed"; | |
1492 | /* full speed bit (6) not working?? */ | |
1493 | } else | |
1494 | s = "not attached"; | |
1495 | t = scnprintf (next, size, | |
1496 | "stdrsp %08x usbctl %08x usbstat %08x " | |
1497 | "addr 0x%02x (%s)\n", | |
1498 | readl (&dev->usb->stdrsp), t1, t2, | |
1499 | readl (&dev->usb->ouraddr), s); | |
1500 | size -= t; | |
1501 | next += t; | |
1502 | ||
1503 | /* PCI Master Control Registers */ | |
1504 | ||
1505 | /* DMA Control Registers */ | |
1506 | ||
1507 | /* Configurable EP Control Registers */ | |
1508 | for (i = 0; i < 7; i++) { | |
1509 | struct net2280_ep *ep; | |
1510 | ||
1511 | ep = &dev->ep [i]; | |
1512 | if (i && !ep->desc) | |
1513 | continue; | |
1514 | ||
1515 | t1 = readl (&ep->regs->ep_cfg); | |
1516 | t2 = readl (&ep->regs->ep_rsp) & 0xff; | |
1517 | t = scnprintf (next, size, | |
1518 | "\n%s\tcfg %05x rsp (%02x) %s%s%s%s%s%s%s%s" | |
1519 | "irqenb %02x\n", | |
1520 | ep->ep.name, t1, t2, | |
1521 | (t2 & (1 << CLEAR_NAK_OUT_PACKETS)) | |
1522 | ? "NAK " : "", | |
1523 | (t2 & (1 << CLEAR_EP_HIDE_STATUS_PHASE)) | |
1524 | ? "hide " : "", | |
1525 | (t2 & (1 << CLEAR_EP_FORCE_CRC_ERROR)) | |
1526 | ? "CRC " : "", | |
1527 | (t2 & (1 << CLEAR_INTERRUPT_MODE)) | |
1528 | ? "interrupt " : "", | |
1529 | (t2 & (1<<CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE)) | |
1530 | ? "status " : "", | |
1531 | (t2 & (1 << CLEAR_NAK_OUT_PACKETS_MODE)) | |
1532 | ? "NAKmode " : "", | |
1533 | (t2 & (1 << CLEAR_ENDPOINT_TOGGLE)) | |
1534 | ? "DATA1 " : "DATA0 ", | |
1535 | (t2 & (1 << CLEAR_ENDPOINT_HALT)) | |
1536 | ? "HALT " : "", | |
1537 | readl (&ep->regs->ep_irqenb)); | |
1538 | size -= t; | |
1539 | next += t; | |
1540 | ||
1541 | t = scnprintf (next, size, | |
1542 | "\tstat %08x avail %04x " | |
1543 | "(ep%d%s-%s)%s\n", | |
1544 | readl (&ep->regs->ep_stat), | |
1545 | readl (&ep->regs->ep_avail), | |
1546 | t1 & 0x0f, DIR_STRING (t1), | |
1547 | type_string (t1 >> 8), | |
1548 | ep->stopped ? "*" : ""); | |
1549 | size -= t; | |
1550 | next += t; | |
1551 | ||
1552 | if (!ep->dma) | |
1553 | continue; | |
1554 | ||
1555 | t = scnprintf (next, size, | |
1556 | " dma\tctl %08x stat %08x count %08x\n" | |
1557 | "\taddr %08x desc %08x\n", | |
1558 | readl (&ep->dma->dmactl), | |
1559 | readl (&ep->dma->dmastat), | |
1560 | readl (&ep->dma->dmacount), | |
1561 | readl (&ep->dma->dmaaddr), | |
1562 | readl (&ep->dma->dmadesc)); | |
1563 | size -= t; | |
1564 | next += t; | |
1565 | ||
1566 | } | |
1567 | ||
1568 | /* Indexed Registers */ | |
901b3d75 | 1569 | // none yet |
1da177e4 LT |
1570 | |
1571 | /* Statistics */ | |
1572 | t = scnprintf (next, size, "\nirqs: "); | |
1573 | size -= t; | |
1574 | next += t; | |
1575 | for (i = 0; i < 7; i++) { | |
1576 | struct net2280_ep *ep; | |
1577 | ||
1578 | ep = &dev->ep [i]; | |
1579 | if (i && !ep->irqs) | |
1580 | continue; | |
1581 | t = scnprintf (next, size, " %s/%lu", ep->ep.name, ep->irqs); | |
1582 | size -= t; | |
1583 | next += t; | |
1584 | ||
1585 | } | |
1586 | t = scnprintf (next, size, "\n"); | |
1587 | size -= t; | |
1588 | next += t; | |
1589 | ||
1590 | spin_unlock_irqrestore (&dev->lock, flags); | |
1591 | ||
1592 | return PAGE_SIZE - size; | |
1593 | } | |
62fb44b9 | 1594 | static DEVICE_ATTR(registers, S_IRUGO, net2280_show_registers, NULL); |
1da177e4 LT |
1595 | |
1596 | static ssize_t | |
10523b3b | 1597 | show_queues (struct device *_dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1598 | { |
1599 | struct net2280 *dev; | |
1600 | char *next; | |
1601 | unsigned size; | |
1602 | unsigned long flags; | |
1603 | int i; | |
1604 | ||
1605 | dev = dev_get_drvdata (_dev); | |
1606 | next = buf; | |
1607 | size = PAGE_SIZE; | |
1608 | spin_lock_irqsave (&dev->lock, flags); | |
1609 | ||
1610 | for (i = 0; i < 7; i++) { | |
1611 | struct net2280_ep *ep = &dev->ep [i]; | |
1612 | struct net2280_request *req; | |
1613 | int t; | |
1614 | ||
1615 | if (i != 0) { | |
1616 | const struct usb_endpoint_descriptor *d; | |
1617 | ||
1618 | d = ep->desc; | |
1619 | if (!d) | |
1620 | continue; | |
1621 | t = d->bEndpointAddress; | |
1622 | t = scnprintf (next, size, | |
1623 | "\n%s (ep%d%s-%s) max %04x %s fifo %d\n", | |
1624 | ep->ep.name, t & USB_ENDPOINT_NUMBER_MASK, | |
1625 | (t & USB_DIR_IN) ? "in" : "out", | |
1626 | ({ char *val; | |
1627 | switch (d->bmAttributes & 0x03) { | |
1628 | case USB_ENDPOINT_XFER_BULK: | |
901b3d75 | 1629 | val = "bulk"; break; |
1da177e4 | 1630 | case USB_ENDPOINT_XFER_INT: |
901b3d75 | 1631 | val = "intr"; break; |
1da177e4 | 1632 | default: |
901b3d75 | 1633 | val = "iso"; break; |
1da177e4 | 1634 | }; val; }), |
29cc8897 | 1635 | usb_endpoint_maxp (d) & 0x1fff, |
1da177e4 LT |
1636 | ep->dma ? "dma" : "pio", ep->fifo_size |
1637 | ); | |
1638 | } else /* ep0 should only have one transfer queued */ | |
1639 | t = scnprintf (next, size, "ep0 max 64 pio %s\n", | |
1640 | ep->is_in ? "in" : "out"); | |
1641 | if (t <= 0 || t > size) | |
1642 | goto done; | |
1643 | size -= t; | |
1644 | next += t; | |
1645 | ||
1646 | if (list_empty (&ep->queue)) { | |
1647 | t = scnprintf (next, size, "\t(nothing queued)\n"); | |
1648 | if (t <= 0 || t > size) | |
1649 | goto done; | |
1650 | size -= t; | |
1651 | next += t; | |
1652 | continue; | |
1653 | } | |
1654 | list_for_each_entry (req, &ep->queue, queue) { | |
1655 | if (ep->dma && req->td_dma == readl (&ep->dma->dmadesc)) | |
1656 | t = scnprintf (next, size, | |
1657 | "\treq %p len %d/%d " | |
1658 | "buf %p (dmacount %08x)\n", | |
1659 | &req->req, req->req.actual, | |
1660 | req->req.length, req->req.buf, | |
1661 | readl (&ep->dma->dmacount)); | |
1662 | else | |
1663 | t = scnprintf (next, size, | |
1664 | "\treq %p len %d/%d buf %p\n", | |
1665 | &req->req, req->req.actual, | |
1666 | req->req.length, req->req.buf); | |
1667 | if (t <= 0 || t > size) | |
1668 | goto done; | |
1669 | size -= t; | |
1670 | next += t; | |
1671 | ||
1672 | if (ep->dma) { | |
1673 | struct net2280_dma *td; | |
1674 | ||
1675 | td = req->td; | |
1676 | t = scnprintf (next, size, "\t td %08x " | |
1677 | " count %08x buf %08x desc %08x\n", | |
1678 | (u32) req->td_dma, | |
1679 | le32_to_cpu (td->dmacount), | |
1680 | le32_to_cpu (td->dmaaddr), | |
1681 | le32_to_cpu (td->dmadesc)); | |
1682 | if (t <= 0 || t > size) | |
1683 | goto done; | |
1684 | size -= t; | |
1685 | next += t; | |
1686 | } | |
1687 | } | |
1688 | } | |
1689 | ||
1690 | done: | |
1691 | spin_unlock_irqrestore (&dev->lock, flags); | |
1692 | return PAGE_SIZE - size; | |
1693 | } | |
1694 | static DEVICE_ATTR (queues, S_IRUGO, show_queues, NULL); | |
1695 | ||
1696 | ||
1697 | #else | |
1698 | ||
9950421c LT |
1699 | #define device_create_file(a,b) (0) |
1700 | #define device_remove_file(a,b) do { } while (0) | |
1da177e4 LT |
1701 | |
1702 | #endif | |
1703 | ||
1704 | /*-------------------------------------------------------------------------*/ | |
1705 | ||
1706 | /* another driver-specific mode might be a request type doing dma | |
1707 | * to/from another device fifo instead of to/from memory. | |
1708 | */ | |
1709 | ||
1710 | static void set_fifo_mode (struct net2280 *dev, int mode) | |
1711 | { | |
1712 | /* keeping high bits preserves BAR2 */ | |
1713 | writel ((0xffff << PCI_BASE2_RANGE) | mode, &dev->regs->fifoctl); | |
1714 | ||
1715 | /* always ep-{a,b,e,f} ... maybe not ep-c or ep-d */ | |
1716 | INIT_LIST_HEAD (&dev->gadget.ep_list); | |
1717 | list_add_tail (&dev->ep [1].ep.ep_list, &dev->gadget.ep_list); | |
1718 | list_add_tail (&dev->ep [2].ep.ep_list, &dev->gadget.ep_list); | |
1719 | switch (mode) { | |
1720 | case 0: | |
1721 | list_add_tail (&dev->ep [3].ep.ep_list, &dev->gadget.ep_list); | |
1722 | list_add_tail (&dev->ep [4].ep.ep_list, &dev->gadget.ep_list); | |
1723 | dev->ep [1].fifo_size = dev->ep [2].fifo_size = 1024; | |
1724 | break; | |
1725 | case 1: | |
1726 | dev->ep [1].fifo_size = dev->ep [2].fifo_size = 2048; | |
1727 | break; | |
1728 | case 2: | |
1729 | list_add_tail (&dev->ep [3].ep.ep_list, &dev->gadget.ep_list); | |
1730 | dev->ep [1].fifo_size = 2048; | |
1731 | dev->ep [2].fifo_size = 1024; | |
1732 | break; | |
1733 | } | |
1734 | /* fifo sizes for ep0, ep-c, ep-d, ep-e, and ep-f never change */ | |
1735 | list_add_tail (&dev->ep [5].ep.ep_list, &dev->gadget.ep_list); | |
1736 | list_add_tail (&dev->ep [6].ep.ep_list, &dev->gadget.ep_list); | |
1737 | } | |
1738 | ||
1da177e4 LT |
1739 | /* keeping it simple: |
1740 | * - one bus driver, initted first; | |
1741 | * - one function driver, initted second | |
1742 | * | |
1743 | * most of the work to support multiple net2280 controllers would | |
1744 | * be to associate this gadget driver (yes?) with all of them, or | |
1745 | * perhaps to bind specific drivers to specific devices. | |
1746 | */ | |
1747 | ||
1da177e4 LT |
1748 | static void usb_reset (struct net2280 *dev) |
1749 | { | |
1750 | u32 tmp; | |
1751 | ||
1752 | dev->gadget.speed = USB_SPEED_UNKNOWN; | |
1753 | (void) readl (&dev->usb->usbctl); | |
1754 | ||
1755 | net2280_led_init (dev); | |
1756 | ||
1757 | /* disable automatic responses, and irqs */ | |
1758 | writel (0, &dev->usb->stdrsp); | |
1759 | writel (0, &dev->regs->pciirqenb0); | |
1760 | writel (0, &dev->regs->pciirqenb1); | |
1761 | ||
1762 | /* clear old dma and irq state */ | |
1763 | for (tmp = 0; tmp < 4; tmp++) { | |
1764 | struct net2280_ep *ep = &dev->ep [tmp + 1]; | |
1765 | ||
1766 | if (ep->dma) | |
1767 | abort_dma (ep); | |
1768 | } | |
1769 | writel (~0, &dev->regs->irqstat0), | |
1770 | writel (~(1 << SUSPEND_REQUEST_INTERRUPT), &dev->regs->irqstat1), | |
1771 | ||
1772 | /* reset, and enable pci */ | |
1773 | tmp = readl (&dev->regs->devinit) | |
1774 | | (1 << PCI_ENABLE) | |
1775 | | (1 << FIFO_SOFT_RESET) | |
1776 | | (1 << USB_SOFT_RESET) | |
1777 | | (1 << M8051_RESET); | |
1778 | writel (tmp, &dev->regs->devinit); | |
1779 | ||
1780 | /* standard fifo and endpoint allocations */ | |
1781 | set_fifo_mode (dev, (fifo_mode <= 2) ? fifo_mode : 0); | |
1782 | } | |
1783 | ||
1784 | static void usb_reinit (struct net2280 *dev) | |
1785 | { | |
1786 | u32 tmp; | |
1787 | int init_dma; | |
1788 | ||
1789 | /* use_dma changes are ignored till next device re-init */ | |
1790 | init_dma = use_dma; | |
1791 | ||
1792 | /* basic endpoint init */ | |
1793 | for (tmp = 0; tmp < 7; tmp++) { | |
1794 | struct net2280_ep *ep = &dev->ep [tmp]; | |
1795 | ||
1796 | ep->ep.name = ep_name [tmp]; | |
1797 | ep->dev = dev; | |
1798 | ep->num = tmp; | |
1799 | ||
1800 | if (tmp > 0 && tmp <= 4) { | |
1801 | ep->fifo_size = 1024; | |
1802 | if (init_dma) | |
1803 | ep->dma = &dev->dma [tmp - 1]; | |
1804 | } else | |
1805 | ep->fifo_size = 64; | |
1806 | ep->regs = &dev->epregs [tmp]; | |
1807 | ep_reset (dev->regs, ep); | |
1808 | } | |
1809 | dev->ep [0].ep.maxpacket = 64; | |
1810 | dev->ep [5].ep.maxpacket = 64; | |
1811 | dev->ep [6].ep.maxpacket = 64; | |
1812 | ||
1813 | dev->gadget.ep0 = &dev->ep [0].ep; | |
1814 | dev->ep [0].stopped = 0; | |
1815 | INIT_LIST_HEAD (&dev->gadget.ep0->ep_list); | |
1816 | ||
1817 | /* we want to prevent lowlevel/insecure access from the USB host, | |
1818 | * but erratum 0119 means this enable bit is ignored | |
1819 | */ | |
1820 | for (tmp = 0; tmp < 5; tmp++) | |
1821 | writel (EP_DONTUSE, &dev->dep [tmp].dep_cfg); | |
1822 | } | |
1823 | ||
1824 | static void ep0_start (struct net2280 *dev) | |
1825 | { | |
1826 | writel ( (1 << CLEAR_EP_HIDE_STATUS_PHASE) | |
1827 | | (1 << CLEAR_NAK_OUT_PACKETS) | |
1828 | | (1 << CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE) | |
1829 | , &dev->epregs [0].ep_rsp); | |
1830 | ||
1831 | /* | |
1832 | * hardware optionally handles a bunch of standard requests | |
1833 | * that the API hides from drivers anyway. have it do so. | |
1834 | * endpoint status/features are handled in software, to | |
1835 | * help pass tests for some dubious behavior. | |
1836 | */ | |
1837 | writel ( (1 << SET_TEST_MODE) | |
1838 | | (1 << SET_ADDRESS) | |
1839 | | (1 << DEVICE_SET_CLEAR_DEVICE_REMOTE_WAKEUP) | |
1840 | | (1 << GET_DEVICE_STATUS) | |
1841 | | (1 << GET_INTERFACE_STATUS) | |
1842 | , &dev->usb->stdrsp); | |
1843 | writel ( (1 << USB_ROOT_PORT_WAKEUP_ENABLE) | |
1844 | | (1 << SELF_POWERED_USB_DEVICE) | |
1845 | | (1 << REMOTE_WAKEUP_SUPPORT) | |
1846 | | (dev->softconnect << USB_DETECT_ENABLE) | |
1847 | | (1 << SELF_POWERED_STATUS) | |
1848 | , &dev->usb->usbctl); | |
1849 | ||
1850 | /* enable irqs so we can see ep0 and general operation */ | |
1851 | writel ( (1 << SETUP_PACKET_INTERRUPT_ENABLE) | |
1852 | | (1 << ENDPOINT_0_INTERRUPT_ENABLE) | |
1853 | , &dev->regs->pciirqenb0); | |
1854 | writel ( (1 << PCI_INTERRUPT_ENABLE) | |
1855 | | (1 << PCI_MASTER_ABORT_RECEIVED_INTERRUPT_ENABLE) | |
1856 | | (1 << PCI_TARGET_ABORT_RECEIVED_INTERRUPT_ENABLE) | |
1857 | | (1 << PCI_RETRY_ABORT_INTERRUPT_ENABLE) | |
1858 | | (1 << VBUS_INTERRUPT_ENABLE) | |
1859 | | (1 << ROOT_PORT_RESET_INTERRUPT_ENABLE) | |
1860 | | (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE) | |
1861 | , &dev->regs->pciirqenb1); | |
1862 | ||
1863 | /* don't leave any writes posted */ | |
1864 | (void) readl (&dev->usb->usbctl); | |
1865 | } | |
1866 | ||
1867 | /* when a driver is successfully registered, it will receive | |
1868 | * control requests including set_configuration(), which enables | |
1869 | * non-control requests. then usb traffic follows until a | |
1870 | * disconnect is reported. then a host may connect again, or | |
1871 | * the driver might get unbound. | |
1872 | */ | |
4cf5e00b FB |
1873 | static int net2280_start(struct usb_gadget *_gadget, |
1874 | struct usb_gadget_driver *driver) | |
1da177e4 | 1875 | { |
4cf5e00b | 1876 | struct net2280 *dev; |
1da177e4 LT |
1877 | int retval; |
1878 | unsigned i; | |
1879 | ||
1880 | /* insist on high speed support from the driver, since | |
1881 | * (dev->usb->xcvrdiag & FORCE_FULL_SPEED_MODE) | |
1882 | * "must not be used in normal operation" | |
1883 | */ | |
bfe0658b | 1884 | if (!driver || driver->speed < USB_SPEED_HIGH |
4cf5e00b | 1885 | || !driver->setup) |
1da177e4 | 1886 | return -EINVAL; |
4cf5e00b FB |
1887 | |
1888 | dev = container_of (_gadget, struct net2280, gadget); | |
1da177e4 LT |
1889 | |
1890 | for (i = 0; i < 7; i++) | |
1891 | dev->ep [i].irqs = 0; | |
1892 | ||
1893 | /* hook up the driver ... */ | |
1894 | dev->softconnect = 1; | |
1895 | driver->driver.bus = NULL; | |
1896 | dev->driver = driver; | |
1897 | dev->gadget.dev.driver = &driver->driver; | |
1da177e4 | 1898 | |
b3899dac JG |
1899 | retval = device_create_file (&dev->pdev->dev, &dev_attr_function); |
1900 | if (retval) goto err_unbind; | |
1901 | retval = device_create_file (&dev->pdev->dev, &dev_attr_queues); | |
1902 | if (retval) goto err_func; | |
1da177e4 LT |
1903 | |
1904 | /* ... then enable host detection and ep0; and we're ready | |
1905 | * for set_configuration as well as eventual disconnect. | |
1906 | */ | |
1907 | net2280_led_active (dev, 1); | |
1908 | ep0_start (dev); | |
1909 | ||
1910 | DEBUG (dev, "%s ready, usbctl %08x stdrsp %08x\n", | |
1911 | driver->driver.name, | |
1912 | readl (&dev->usb->usbctl), | |
1913 | readl (&dev->usb->stdrsp)); | |
1914 | ||
1915 | /* pci writes may still be posted */ | |
1916 | return 0; | |
b3899dac JG |
1917 | |
1918 | err_func: | |
1919 | device_remove_file (&dev->pdev->dev, &dev_attr_function); | |
1920 | err_unbind: | |
1921 | driver->unbind (&dev->gadget); | |
1922 | dev->gadget.dev.driver = NULL; | |
1923 | dev->driver = NULL; | |
1924 | return retval; | |
1da177e4 | 1925 | } |
1da177e4 LT |
1926 | |
1927 | static void | |
1928 | stop_activity (struct net2280 *dev, struct usb_gadget_driver *driver) | |
1929 | { | |
1930 | int i; | |
1931 | ||
1932 | /* don't disconnect if it's not connected */ | |
1933 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1934 | driver = NULL; | |
1935 | ||
1936 | /* stop hardware; prevent new request submissions; | |
1937 | * and kill any outstanding requests. | |
1938 | */ | |
1939 | usb_reset (dev); | |
1940 | for (i = 0; i < 7; i++) | |
1941 | nuke (&dev->ep [i]); | |
1942 | ||
1da177e4 LT |
1943 | usb_reinit (dev); |
1944 | } | |
1945 | ||
4cf5e00b FB |
1946 | static int net2280_stop(struct usb_gadget *_gadget, |
1947 | struct usb_gadget_driver *driver) | |
1da177e4 | 1948 | { |
4cf5e00b | 1949 | struct net2280 *dev; |
1da177e4 LT |
1950 | unsigned long flags; |
1951 | ||
4cf5e00b | 1952 | dev = container_of (_gadget, struct net2280, gadget); |
1da177e4 LT |
1953 | |
1954 | spin_lock_irqsave (&dev->lock, flags); | |
1955 | stop_activity (dev, driver); | |
1956 | spin_unlock_irqrestore (&dev->lock, flags); | |
1957 | ||
1da177e4 LT |
1958 | dev->gadget.dev.driver = NULL; |
1959 | dev->driver = NULL; | |
1960 | ||
1961 | net2280_led_active (dev, 0); | |
1962 | device_remove_file (&dev->pdev->dev, &dev_attr_function); | |
1963 | device_remove_file (&dev->pdev->dev, &dev_attr_queues); | |
1964 | ||
1965 | DEBUG (dev, "unregistered driver '%s'\n", driver->driver.name); | |
1966 | return 0; | |
1967 | } | |
1da177e4 LT |
1968 | |
1969 | /*-------------------------------------------------------------------------*/ | |
1970 | ||
1971 | /* handle ep0, ep-e, ep-f with 64 byte packets: packet per irq. | |
1972 | * also works for dma-capable endpoints, in pio mode or just | |
1973 | * to manually advance the queue after short OUT transfers. | |
1974 | */ | |
1975 | static void handle_ep_small (struct net2280_ep *ep) | |
1976 | { | |
1977 | struct net2280_request *req; | |
1978 | u32 t; | |
1979 | /* 0 error, 1 mid-data, 2 done */ | |
1980 | int mode = 1; | |
1981 | ||
1982 | if (!list_empty (&ep->queue)) | |
1983 | req = list_entry (ep->queue.next, | |
1984 | struct net2280_request, queue); | |
1985 | else | |
1986 | req = NULL; | |
1987 | ||
1988 | /* ack all, and handle what we care about */ | |
1989 | t = readl (&ep->regs->ep_stat); | |
1990 | ep->irqs++; | |
1991 | #if 0 | |
1992 | VDEBUG (ep->dev, "%s ack ep_stat %08x, req %p\n", | |
1993 | ep->ep.name, t, req ? &req->req : 0); | |
1994 | #endif | |
950ee4c8 GL |
1995 | if (!ep->is_in || ep->dev->pdev->device == 0x2280) |
1996 | writel (t & ~(1 << NAK_OUT_PACKETS), &ep->regs->ep_stat); | |
1997 | else | |
1998 | /* Added for 2282 */ | |
1999 | writel (t, &ep->regs->ep_stat); | |
1da177e4 LT |
2000 | |
2001 | /* for ep0, monitor token irqs to catch data stage length errors | |
2002 | * and to synchronize on status. | |
2003 | * | |
2004 | * also, to defer reporting of protocol stalls ... here's where | |
2005 | * data or status first appears, handling stalls here should never | |
2006 | * cause trouble on the host side.. | |
2007 | * | |
2008 | * control requests could be slightly faster without token synch for | |
2009 | * status, but status can jam up that way. | |
2010 | */ | |
2011 | if (unlikely (ep->num == 0)) { | |
2012 | if (ep->is_in) { | |
2013 | /* status; stop NAKing */ | |
2014 | if (t & (1 << DATA_OUT_PING_TOKEN_INTERRUPT)) { | |
2015 | if (ep->dev->protocol_stall) { | |
2016 | ep->stopped = 1; | |
2017 | set_halt (ep); | |
2018 | } | |
2019 | if (!req) | |
2020 | allow_status (ep); | |
2021 | mode = 2; | |
2022 | /* reply to extra IN data tokens with a zlp */ | |
2023 | } else if (t & (1 << DATA_IN_TOKEN_INTERRUPT)) { | |
2024 | if (ep->dev->protocol_stall) { | |
2025 | ep->stopped = 1; | |
2026 | set_halt (ep); | |
2027 | mode = 2; | |
1f26e28d AS |
2028 | } else if (ep->responded && |
2029 | !req && !ep->stopped) | |
1da177e4 LT |
2030 | write_fifo (ep, NULL); |
2031 | } | |
2032 | } else { | |
2033 | /* status; stop NAKing */ | |
2034 | if (t & (1 << DATA_IN_TOKEN_INTERRUPT)) { | |
2035 | if (ep->dev->protocol_stall) { | |
2036 | ep->stopped = 1; | |
2037 | set_halt (ep); | |
2038 | } | |
2039 | mode = 2; | |
2040 | /* an extra OUT token is an error */ | |
2041 | } else if (((t & (1 << DATA_OUT_PING_TOKEN_INTERRUPT)) | |
2042 | && req | |
2043 | && req->req.actual == req->req.length) | |
1f26e28d | 2044 | || (ep->responded && !req)) { |
1da177e4 LT |
2045 | ep->dev->protocol_stall = 1; |
2046 | set_halt (ep); | |
2047 | ep->stopped = 1; | |
2048 | if (req) | |
2049 | done (ep, req, -EOVERFLOW); | |
2050 | req = NULL; | |
2051 | } | |
2052 | } | |
2053 | } | |
2054 | ||
2055 | if (unlikely (!req)) | |
2056 | return; | |
2057 | ||
2058 | /* manual DMA queue advance after short OUT */ | |
2059 | if (likely (ep->dma != 0)) { | |
2060 | if (t & (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)) { | |
2061 | u32 count; | |
2062 | int stopped = ep->stopped; | |
2063 | ||
2064 | /* TRANSFERRED works around OUT_DONE erratum 0112. | |
2065 | * we expect (N <= maxpacket) bytes; host wrote M. | |
2066 | * iff (M < N) we won't ever see a DMA interrupt. | |
2067 | */ | |
2068 | ep->stopped = 1; | |
2069 | for (count = 0; ; t = readl (&ep->regs->ep_stat)) { | |
2070 | ||
2071 | /* any preceding dma transfers must finish. | |
2072 | * dma handles (M >= N), may empty the queue | |
2073 | */ | |
2074 | scan_dma_completions (ep); | |
2075 | if (unlikely (list_empty (&ep->queue) | |
2076 | || ep->out_overflow)) { | |
2077 | req = NULL; | |
2078 | break; | |
2079 | } | |
2080 | req = list_entry (ep->queue.next, | |
2081 | struct net2280_request, queue); | |
2082 | ||
2083 | /* here either (M < N), a "real" short rx; | |
2084 | * or (M == N) and the queue didn't empty | |
2085 | */ | |
2086 | if (likely (t & (1 << FIFO_EMPTY))) { | |
2087 | count = readl (&ep->dma->dmacount); | |
2088 | count &= DMA_BYTE_COUNT_MASK; | |
2089 | if (readl (&ep->dma->dmadesc) | |
2090 | != req->td_dma) | |
2091 | req = NULL; | |
2092 | break; | |
2093 | } | |
2094 | udelay(1); | |
2095 | } | |
2096 | ||
2097 | /* stop DMA, leave ep NAKing */ | |
2098 | writel ((1 << DMA_ABORT), &ep->dma->dmastat); | |
2099 | spin_stop_dma (ep->dma); | |
2100 | ||
2101 | if (likely (req)) { | |
2102 | req->td->dmacount = 0; | |
2103 | t = readl (&ep->regs->ep_avail); | |
68dcc688 | 2104 | dma_done (ep, req, count, |
901b3d75 DB |
2105 | (ep->out_overflow || t) |
2106 | ? -EOVERFLOW : 0); | |
1da177e4 LT |
2107 | } |
2108 | ||
2109 | /* also flush to prevent erratum 0106 trouble */ | |
2110 | if (unlikely (ep->out_overflow | |
2111 | || (ep->dev->chiprev == 0x0100 | |
2112 | && ep->dev->gadget.speed | |
2113 | == USB_SPEED_FULL))) { | |
2114 | out_flush (ep); | |
2115 | ep->out_overflow = 0; | |
2116 | } | |
2117 | ||
2118 | /* (re)start dma if needed, stop NAKing */ | |
2119 | ep->stopped = stopped; | |
2120 | if (!list_empty (&ep->queue)) | |
2121 | restart_dma (ep); | |
2122 | } else | |
2123 | DEBUG (ep->dev, "%s dma ep_stat %08x ??\n", | |
2124 | ep->ep.name, t); | |
2125 | return; | |
2126 | ||
2127 | /* data packet(s) received (in the fifo, OUT) */ | |
2128 | } else if (t & (1 << DATA_PACKET_RECEIVED_INTERRUPT)) { | |
2129 | if (read_fifo (ep, req) && ep->num != 0) | |
2130 | mode = 2; | |
2131 | ||
2132 | /* data packet(s) transmitted (IN) */ | |
2133 | } else if (t & (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)) { | |
2134 | unsigned len; | |
2135 | ||
2136 | len = req->req.length - req->req.actual; | |
2137 | if (len > ep->ep.maxpacket) | |
2138 | len = ep->ep.maxpacket; | |
2139 | req->req.actual += len; | |
2140 | ||
2141 | /* if we wrote it all, we're usually done */ | |
2142 | if (req->req.actual == req->req.length) { | |
2143 | if (ep->num == 0) { | |
317e83b8 | 2144 | /* send zlps until the status stage */ |
1da177e4 LT |
2145 | } else if (!req->req.zero || len != ep->ep.maxpacket) |
2146 | mode = 2; | |
2147 | } | |
2148 | ||
2149 | /* there was nothing to do ... */ | |
2150 | } else if (mode == 1) | |
2151 | return; | |
2152 | ||
2153 | /* done */ | |
2154 | if (mode == 2) { | |
2155 | /* stream endpoints often resubmit/unlink in completion */ | |
2156 | done (ep, req, 0); | |
2157 | ||
2158 | /* maybe advance queue to next request */ | |
2159 | if (ep->num == 0) { | |
2160 | /* NOTE: net2280 could let gadget driver start the | |
2161 | * status stage later. since not all controllers let | |
2162 | * them control that, the api doesn't (yet) allow it. | |
2163 | */ | |
2164 | if (!ep->stopped) | |
2165 | allow_status (ep); | |
2166 | req = NULL; | |
2167 | } else { | |
2168 | if (!list_empty (&ep->queue) && !ep->stopped) | |
2169 | req = list_entry (ep->queue.next, | |
2170 | struct net2280_request, queue); | |
2171 | else | |
2172 | req = NULL; | |
2173 | if (req && !ep->is_in) | |
2174 | stop_out_naking (ep); | |
2175 | } | |
2176 | } | |
2177 | ||
2178 | /* is there a buffer for the next packet? | |
2179 | * for best streaming performance, make sure there is one. | |
2180 | */ | |
2181 | if (req && !ep->stopped) { | |
2182 | ||
2183 | /* load IN fifo with next packet (may be zlp) */ | |
2184 | if (t & (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)) | |
2185 | write_fifo (ep, &req->req); | |
2186 | } | |
2187 | } | |
2188 | ||
2189 | static struct net2280_ep * | |
2190 | get_ep_by_addr (struct net2280 *dev, u16 wIndex) | |
2191 | { | |
2192 | struct net2280_ep *ep; | |
2193 | ||
2194 | if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0) | |
2195 | return &dev->ep [0]; | |
2196 | list_for_each_entry (ep, &dev->gadget.ep_list, ep.ep_list) { | |
2197 | u8 bEndpointAddress; | |
2198 | ||
2199 | if (!ep->desc) | |
2200 | continue; | |
2201 | bEndpointAddress = ep->desc->bEndpointAddress; | |
2202 | if ((wIndex ^ bEndpointAddress) & USB_DIR_IN) | |
2203 | continue; | |
2204 | if ((wIndex & 0x0f) == (bEndpointAddress & 0x0f)) | |
2205 | return ep; | |
2206 | } | |
2207 | return NULL; | |
2208 | } | |
2209 | ||
2210 | static void handle_stat0_irqs (struct net2280 *dev, u32 stat) | |
2211 | { | |
2212 | struct net2280_ep *ep; | |
2213 | u32 num, scratch; | |
2214 | ||
2215 | /* most of these don't need individual acks */ | |
2216 | stat &= ~(1 << INTA_ASSERTED); | |
2217 | if (!stat) | |
2218 | return; | |
2219 | // DEBUG (dev, "irqstat0 %04x\n", stat); | |
2220 | ||
2221 | /* starting a control request? */ | |
2222 | if (unlikely (stat & (1 << SETUP_PACKET_INTERRUPT))) { | |
2223 | union { | |
2224 | u32 raw [2]; | |
2225 | struct usb_ctrlrequest r; | |
2226 | } u; | |
950ee4c8 | 2227 | int tmp; |
1da177e4 LT |
2228 | struct net2280_request *req; |
2229 | ||
2230 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) { | |
2231 | if (readl (&dev->usb->usbstat) & (1 << HIGH_SPEED)) | |
2232 | dev->gadget.speed = USB_SPEED_HIGH; | |
2233 | else | |
2234 | dev->gadget.speed = USB_SPEED_FULL; | |
2235 | net2280_led_speed (dev, dev->gadget.speed); | |
e538dfda | 2236 | DEBUG(dev, "%s\n", usb_speed_string(dev->gadget.speed)); |
1da177e4 LT |
2237 | } |
2238 | ||
2239 | ep = &dev->ep [0]; | |
2240 | ep->irqs++; | |
2241 | ||
2242 | /* make sure any leftover request state is cleared */ | |
2243 | stat &= ~(1 << ENDPOINT_0_INTERRUPT); | |
2244 | while (!list_empty (&ep->queue)) { | |
2245 | req = list_entry (ep->queue.next, | |
2246 | struct net2280_request, queue); | |
2247 | done (ep, req, (req->req.actual == req->req.length) | |
2248 | ? 0 : -EPROTO); | |
2249 | } | |
2250 | ep->stopped = 0; | |
2251 | dev->protocol_stall = 0; | |
950ee4c8 GL |
2252 | |
2253 | if (ep->dev->pdev->device == 0x2280) | |
2254 | tmp = (1 << FIFO_OVERFLOW) | |
2255 | | (1 << FIFO_UNDERFLOW); | |
2256 | else | |
2257 | tmp = 0; | |
2258 | ||
2259 | writel (tmp | (1 << TIMEOUT) | |
1da177e4 LT |
2260 | | (1 << USB_STALL_SENT) |
2261 | | (1 << USB_IN_NAK_SENT) | |
2262 | | (1 << USB_IN_ACK_RCVD) | |
2263 | | (1 << USB_OUT_PING_NAK_SENT) | |
2264 | | (1 << USB_OUT_ACK_SENT) | |
1da177e4 LT |
2265 | | (1 << SHORT_PACKET_OUT_DONE_INTERRUPT) |
2266 | | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT) | |
2267 | | (1 << DATA_PACKET_RECEIVED_INTERRUPT) | |
2268 | | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT) | |
2269 | | (1 << DATA_OUT_PING_TOKEN_INTERRUPT) | |
2270 | | (1 << DATA_IN_TOKEN_INTERRUPT) | |
2271 | , &ep->regs->ep_stat); | |
2272 | u.raw [0] = readl (&dev->usb->setup0123); | |
2273 | u.raw [1] = readl (&dev->usb->setup4567); | |
901b3d75 | 2274 | |
1da177e4 LT |
2275 | cpu_to_le32s (&u.raw [0]); |
2276 | cpu_to_le32s (&u.raw [1]); | |
2277 | ||
950ee4c8 GL |
2278 | tmp = 0; |
2279 | ||
01ee7d70 DB |
2280 | #define w_value le16_to_cpu(u.r.wValue) |
2281 | #define w_index le16_to_cpu(u.r.wIndex) | |
2282 | #define w_length le16_to_cpu(u.r.wLength) | |
1da177e4 LT |
2283 | |
2284 | /* ack the irq */ | |
2285 | writel (1 << SETUP_PACKET_INTERRUPT, &dev->regs->irqstat0); | |
2286 | stat ^= (1 << SETUP_PACKET_INTERRUPT); | |
2287 | ||
2288 | /* watch control traffic at the token level, and force | |
2289 | * synchronization before letting the status stage happen. | |
2290 | * FIXME ignore tokens we'll NAK, until driver responds. | |
2291 | * that'll mean a lot less irqs for some drivers. | |
2292 | */ | |
2293 | ep->is_in = (u.r.bRequestType & USB_DIR_IN) != 0; | |
2294 | if (ep->is_in) { | |
2295 | scratch = (1 << DATA_PACKET_TRANSMITTED_INTERRUPT) | |
2296 | | (1 << DATA_OUT_PING_TOKEN_INTERRUPT) | |
2297 | | (1 << DATA_IN_TOKEN_INTERRUPT); | |
2298 | stop_out_naking (ep); | |
2299 | } else | |
2300 | scratch = (1 << DATA_PACKET_RECEIVED_INTERRUPT) | |
2301 | | (1 << DATA_OUT_PING_TOKEN_INTERRUPT) | |
2302 | | (1 << DATA_IN_TOKEN_INTERRUPT); | |
2303 | writel (scratch, &dev->epregs [0].ep_irqenb); | |
2304 | ||
2305 | /* we made the hardware handle most lowlevel requests; | |
2306 | * everything else goes uplevel to the gadget code. | |
2307 | */ | |
1f26e28d | 2308 | ep->responded = 1; |
1da177e4 LT |
2309 | switch (u.r.bRequest) { |
2310 | case USB_REQ_GET_STATUS: { | |
2311 | struct net2280_ep *e; | |
320f3459 | 2312 | __le32 status; |
1da177e4 LT |
2313 | |
2314 | /* hw handles device and interface status */ | |
2315 | if (u.r.bRequestType != (USB_DIR_IN|USB_RECIP_ENDPOINT)) | |
2316 | goto delegate; | |
320f3459 DB |
2317 | if ((e = get_ep_by_addr (dev, w_index)) == 0 |
2318 | || w_length > 2) | |
1da177e4 LT |
2319 | goto do_stall; |
2320 | ||
2321 | if (readl (&e->regs->ep_rsp) | |
2322 | & (1 << SET_ENDPOINT_HALT)) | |
551509d2 | 2323 | status = cpu_to_le32 (1); |
1da177e4 | 2324 | else |
551509d2 | 2325 | status = cpu_to_le32 (0); |
1da177e4 LT |
2326 | |
2327 | /* don't bother with a request object! */ | |
2328 | writel (0, &dev->epregs [0].ep_irqenb); | |
320f3459 DB |
2329 | set_fifo_bytecount (ep, w_length); |
2330 | writel ((__force u32)status, &dev->epregs [0].ep_data); | |
1da177e4 LT |
2331 | allow_status (ep); |
2332 | VDEBUG (dev, "%s stat %02x\n", ep->ep.name, status); | |
2333 | goto next_endpoints; | |
2334 | } | |
2335 | break; | |
2336 | case USB_REQ_CLEAR_FEATURE: { | |
2337 | struct net2280_ep *e; | |
2338 | ||
2339 | /* hw handles device features */ | |
2340 | if (u.r.bRequestType != USB_RECIP_ENDPOINT) | |
2341 | goto delegate; | |
320f3459 DB |
2342 | if (w_value != USB_ENDPOINT_HALT |
2343 | || w_length != 0) | |
1da177e4 | 2344 | goto do_stall; |
320f3459 | 2345 | if ((e = get_ep_by_addr (dev, w_index)) == 0) |
1da177e4 | 2346 | goto do_stall; |
8066134f AS |
2347 | if (e->wedged) { |
2348 | VDEBUG(dev, "%s wedged, halt not cleared\n", | |
2349 | ep->ep.name); | |
2350 | } else { | |
2351 | VDEBUG(dev, "%s clear halt\n", ep->ep.name); | |
2352 | clear_halt(e); | |
2353 | } | |
1da177e4 | 2354 | allow_status (ep); |
1da177e4 LT |
2355 | goto next_endpoints; |
2356 | } | |
2357 | break; | |
2358 | case USB_REQ_SET_FEATURE: { | |
2359 | struct net2280_ep *e; | |
2360 | ||
2361 | /* hw handles device features */ | |
2362 | if (u.r.bRequestType != USB_RECIP_ENDPOINT) | |
2363 | goto delegate; | |
320f3459 DB |
2364 | if (w_value != USB_ENDPOINT_HALT |
2365 | || w_length != 0) | |
1da177e4 | 2366 | goto do_stall; |
320f3459 | 2367 | if ((e = get_ep_by_addr (dev, w_index)) == 0) |
1da177e4 | 2368 | goto do_stall; |
8066134f AS |
2369 | if (e->ep.name == ep0name) |
2370 | goto do_stall; | |
1da177e4 LT |
2371 | set_halt (e); |
2372 | allow_status (ep); | |
2373 | VDEBUG (dev, "%s set halt\n", ep->ep.name); | |
2374 | goto next_endpoints; | |
2375 | } | |
2376 | break; | |
2377 | default: | |
2378 | delegate: | |
fec8de3a | 2379 | VDEBUG (dev, "setup %02x.%02x v%04x i%04x l%04x " |
1da177e4 LT |
2380 | "ep_cfg %08x\n", |
2381 | u.r.bRequestType, u.r.bRequest, | |
320f3459 | 2382 | w_value, w_index, w_length, |
1da177e4 | 2383 | readl (&ep->regs->ep_cfg)); |
1f26e28d | 2384 | ep->responded = 0; |
1da177e4 LT |
2385 | spin_unlock (&dev->lock); |
2386 | tmp = dev->driver->setup (&dev->gadget, &u.r); | |
2387 | spin_lock (&dev->lock); | |
2388 | } | |
2389 | ||
2390 | /* stall ep0 on error */ | |
2391 | if (tmp < 0) { | |
2392 | do_stall: | |
2393 | VDEBUG (dev, "req %02x.%02x protocol STALL; stat %d\n", | |
2394 | u.r.bRequestType, u.r.bRequest, tmp); | |
2395 | dev->protocol_stall = 1; | |
2396 | } | |
2397 | ||
2398 | /* some in/out token irq should follow; maybe stall then. | |
2399 | * driver must queue a request (even zlp) or halt ep0 | |
2400 | * before the host times out. | |
2401 | */ | |
2402 | } | |
2403 | ||
320f3459 DB |
2404 | #undef w_value |
2405 | #undef w_index | |
2406 | #undef w_length | |
2407 | ||
1da177e4 LT |
2408 | next_endpoints: |
2409 | /* endpoint data irq ? */ | |
2410 | scratch = stat & 0x7f; | |
2411 | stat &= ~0x7f; | |
2412 | for (num = 0; scratch; num++) { | |
2413 | u32 t; | |
2414 | ||
2415 | /* do this endpoint's FIFO and queue need tending? */ | |
2416 | t = 1 << num; | |
2417 | if ((scratch & t) == 0) | |
2418 | continue; | |
2419 | scratch ^= t; | |
2420 | ||
2421 | ep = &dev->ep [num]; | |
2422 | handle_ep_small (ep); | |
2423 | } | |
2424 | ||
2425 | if (stat) | |
2426 | DEBUG (dev, "unhandled irqstat0 %08x\n", stat); | |
2427 | } | |
2428 | ||
2429 | #define DMA_INTERRUPTS ( \ | |
2430 | (1 << DMA_D_INTERRUPT) \ | |
2431 | | (1 << DMA_C_INTERRUPT) \ | |
2432 | | (1 << DMA_B_INTERRUPT) \ | |
2433 | | (1 << DMA_A_INTERRUPT)) | |
2434 | #define PCI_ERROR_INTERRUPTS ( \ | |
2435 | (1 << PCI_MASTER_ABORT_RECEIVED_INTERRUPT) \ | |
2436 | | (1 << PCI_TARGET_ABORT_RECEIVED_INTERRUPT) \ | |
2437 | | (1 << PCI_RETRY_ABORT_INTERRUPT)) | |
2438 | ||
2439 | static void handle_stat1_irqs (struct net2280 *dev, u32 stat) | |
2440 | { | |
2441 | struct net2280_ep *ep; | |
2442 | u32 tmp, num, mask, scratch; | |
2443 | ||
2444 | /* after disconnect there's nothing else to do! */ | |
2445 | tmp = (1 << VBUS_INTERRUPT) | (1 << ROOT_PORT_RESET_INTERRUPT); | |
2446 | mask = (1 << HIGH_SPEED) | (1 << FULL_SPEED); | |
2447 | ||
2448 | /* VBUS disconnect is indicated by VBUS_PIN and VBUS_INTERRUPT set. | |
fb914ebf | 2449 | * Root Port Reset is indicated by ROOT_PORT_RESET_INTERRUPT set and |
901b3d75 | 2450 | * both HIGH_SPEED and FULL_SPEED clear (as ROOT_PORT_RESET_INTERRUPT |
1da177e4 LT |
2451 | * only indicates a change in the reset state). |
2452 | */ | |
2453 | if (stat & tmp) { | |
2454 | writel (tmp, &dev->regs->irqstat1); | |
901b3d75 DB |
2455 | if ((((stat & (1 << ROOT_PORT_RESET_INTERRUPT)) |
2456 | && ((readl (&dev->usb->usbstat) & mask) | |
2457 | == 0)) | |
2458 | || ((readl (&dev->usb->usbctl) | |
2459 | & (1 << VBUS_PIN)) == 0) | |
1da177e4 LT |
2460 | ) && ( dev->gadget.speed != USB_SPEED_UNKNOWN)) { |
2461 | DEBUG (dev, "disconnect %s\n", | |
2462 | dev->driver->driver.name); | |
2463 | stop_activity (dev, dev->driver); | |
2464 | ep0_start (dev); | |
2465 | return; | |
2466 | } | |
2467 | stat &= ~tmp; | |
2468 | ||
2469 | /* vBUS can bounce ... one of many reasons to ignore the | |
2470 | * notion of hotplug events on bus connect/disconnect! | |
2471 | */ | |
2472 | if (!stat) | |
2473 | return; | |
2474 | } | |
2475 | ||
2476 | /* NOTE: chip stays in PCI D0 state for now, but it could | |
2477 | * enter D1 to save more power | |
2478 | */ | |
2479 | tmp = (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT); | |
2480 | if (stat & tmp) { | |
2481 | writel (tmp, &dev->regs->irqstat1); | |
2482 | if (stat & (1 << SUSPEND_REQUEST_INTERRUPT)) { | |
2483 | if (dev->driver->suspend) | |
2484 | dev->driver->suspend (&dev->gadget); | |
2485 | if (!enable_suspend) | |
2486 | stat &= ~(1 << SUSPEND_REQUEST_INTERRUPT); | |
2487 | } else { | |
2488 | if (dev->driver->resume) | |
2489 | dev->driver->resume (&dev->gadget); | |
2490 | /* at high speed, note erratum 0133 */ | |
2491 | } | |
2492 | stat &= ~tmp; | |
2493 | } | |
2494 | ||
2495 | /* clear any other status/irqs */ | |
2496 | if (stat) | |
2497 | writel (stat, &dev->regs->irqstat1); | |
2498 | ||
2499 | /* some status we can just ignore */ | |
950ee4c8 GL |
2500 | if (dev->pdev->device == 0x2280) |
2501 | stat &= ~((1 << CONTROL_STATUS_INTERRUPT) | |
2502 | | (1 << SUSPEND_REQUEST_INTERRUPT) | |
2503 | | (1 << RESUME_INTERRUPT) | |
2504 | | (1 << SOF_INTERRUPT)); | |
2505 | else | |
2506 | stat &= ~((1 << CONTROL_STATUS_INTERRUPT) | |
2507 | | (1 << RESUME_INTERRUPT) | |
2508 | | (1 << SOF_DOWN_INTERRUPT) | |
2509 | | (1 << SOF_INTERRUPT)); | |
2510 | ||
1da177e4 LT |
2511 | if (!stat) |
2512 | return; | |
2513 | // DEBUG (dev, "irqstat1 %08x\n", stat); | |
2514 | ||
2515 | /* DMA status, for ep-{a,b,c,d} */ | |
2516 | scratch = stat & DMA_INTERRUPTS; | |
2517 | stat &= ~DMA_INTERRUPTS; | |
2518 | scratch >>= 9; | |
2519 | for (num = 0; scratch; num++) { | |
2520 | struct net2280_dma_regs __iomem *dma; | |
2521 | ||
2522 | tmp = 1 << num; | |
2523 | if ((tmp & scratch) == 0) | |
2524 | continue; | |
2525 | scratch ^= tmp; | |
2526 | ||
2527 | ep = &dev->ep [num + 1]; | |
2528 | dma = ep->dma; | |
2529 | ||
2530 | if (!dma) | |
2531 | continue; | |
2532 | ||
2533 | /* clear ep's dma status */ | |
2534 | tmp = readl (&dma->dmastat); | |
2535 | writel (tmp, &dma->dmastat); | |
2536 | ||
2537 | /* chaining should stop on abort, short OUT from fifo, | |
2538 | * or (stat0 codepath) short OUT transfer. | |
2539 | */ | |
2540 | if (!use_dma_chaining) { | |
2541 | if ((tmp & (1 << DMA_TRANSACTION_DONE_INTERRUPT)) | |
2542 | == 0) { | |
2543 | DEBUG (ep->dev, "%s no xact done? %08x\n", | |
2544 | ep->ep.name, tmp); | |
2545 | continue; | |
2546 | } | |
2547 | stop_dma (ep->dma); | |
2548 | } | |
2549 | ||
2550 | /* OUT transfers terminate when the data from the | |
2551 | * host is in our memory. Process whatever's done. | |
2552 | * On this path, we know transfer's last packet wasn't | |
2553 | * less than req->length. NAK_OUT_PACKETS may be set, | |
2554 | * or the FIFO may already be holding new packets. | |
2555 | * | |
2556 | * IN transfers can linger in the FIFO for a very | |
2557 | * long time ... we ignore that for now, accounting | |
2558 | * precisely (like PIO does) needs per-packet irqs | |
2559 | */ | |
2560 | scan_dma_completions (ep); | |
2561 | ||
2562 | /* disable dma on inactive queues; else maybe restart */ | |
2563 | if (list_empty (&ep->queue)) { | |
2564 | if (use_dma_chaining) | |
2565 | stop_dma (ep->dma); | |
2566 | } else { | |
2567 | tmp = readl (&dma->dmactl); | |
2568 | if (!use_dma_chaining | |
2569 | || (tmp & (1 << DMA_ENABLE)) == 0) | |
2570 | restart_dma (ep); | |
2571 | else if (ep->is_in && use_dma_chaining) { | |
2572 | struct net2280_request *req; | |
320f3459 | 2573 | __le32 dmacount; |
1da177e4 LT |
2574 | |
2575 | /* the descriptor at the head of the chain | |
2576 | * may still have VALID_BIT clear; that's | |
2577 | * used to trigger changing DMA_FIFO_VALIDATE | |
2578 | * (affects automagic zlp writes). | |
2579 | */ | |
2580 | req = list_entry (ep->queue.next, | |
2581 | struct net2280_request, queue); | |
2582 | dmacount = req->td->dmacount; | |
551509d2 | 2583 | dmacount &= cpu_to_le32 ( |
1da177e4 LT |
2584 | (1 << VALID_BIT) |
2585 | | DMA_BYTE_COUNT_MASK); | |
2586 | if (dmacount && (dmacount & valid_bit) == 0) | |
2587 | restart_dma (ep); | |
2588 | } | |
2589 | } | |
2590 | ep->irqs++; | |
2591 | } | |
2592 | ||
2593 | /* NOTE: there are other PCI errors we might usefully notice. | |
2594 | * if they appear very often, here's where to try recovering. | |
2595 | */ | |
2596 | if (stat & PCI_ERROR_INTERRUPTS) { | |
2597 | ERROR (dev, "pci dma error; stat %08x\n", stat); | |
2598 | stat &= ~PCI_ERROR_INTERRUPTS; | |
2599 | /* these are fatal errors, but "maybe" they won't | |
2600 | * happen again ... | |
2601 | */ | |
2602 | stop_activity (dev, dev->driver); | |
2603 | ep0_start (dev); | |
2604 | stat = 0; | |
2605 | } | |
2606 | ||
2607 | if (stat) | |
2608 | DEBUG (dev, "unhandled irqstat1 %08x\n", stat); | |
2609 | } | |
2610 | ||
7d12e780 | 2611 | static irqreturn_t net2280_irq (int irq, void *_dev) |
1da177e4 LT |
2612 | { |
2613 | struct net2280 *dev = _dev; | |
2614 | ||
658ad5e0 AS |
2615 | /* shared interrupt, not ours */ |
2616 | if (!(readl(&dev->regs->irqstat0) & (1 << INTA_ASSERTED))) | |
2617 | return IRQ_NONE; | |
2618 | ||
1da177e4 LT |
2619 | spin_lock (&dev->lock); |
2620 | ||
2621 | /* handle disconnect, dma, and more */ | |
2622 | handle_stat1_irqs (dev, readl (&dev->regs->irqstat1)); | |
2623 | ||
2624 | /* control requests and PIO */ | |
2625 | handle_stat0_irqs (dev, readl (&dev->regs->irqstat0)); | |
2626 | ||
2627 | spin_unlock (&dev->lock); | |
2628 | ||
2629 | return IRQ_HANDLED; | |
2630 | } | |
2631 | ||
2632 | /*-------------------------------------------------------------------------*/ | |
2633 | ||
2634 | static void gadget_release (struct device *_dev) | |
2635 | { | |
2636 | struct net2280 *dev = dev_get_drvdata (_dev); | |
2637 | ||
2638 | kfree (dev); | |
2639 | } | |
2640 | ||
2641 | /* tear down the binding between this driver and the pci device */ | |
2642 | ||
2643 | static void net2280_remove (struct pci_dev *pdev) | |
2644 | { | |
2645 | struct net2280 *dev = pci_get_drvdata (pdev); | |
2646 | ||
0f91349b SAS |
2647 | usb_del_gadget_udc(&dev->gadget); |
2648 | ||
6bea476c | 2649 | BUG_ON(dev->driver); |
1da177e4 LT |
2650 | |
2651 | /* then clean up the resources we allocated during probe() */ | |
2652 | net2280_led_shutdown (dev); | |
2653 | if (dev->requests) { | |
2654 | int i; | |
2655 | for (i = 1; i < 5; i++) { | |
2656 | if (!dev->ep [i].dummy) | |
2657 | continue; | |
2658 | pci_pool_free (dev->requests, dev->ep [i].dummy, | |
2659 | dev->ep [i].td_dma); | |
2660 | } | |
2661 | pci_pool_destroy (dev->requests); | |
2662 | } | |
2663 | if (dev->got_irq) | |
2664 | free_irq (pdev->irq, dev); | |
2665 | if (dev->regs) | |
2666 | iounmap (dev->regs); | |
2667 | if (dev->region) | |
2668 | release_mem_region (pci_resource_start (pdev, 0), | |
2669 | pci_resource_len (pdev, 0)); | |
2670 | if (dev->enabled) | |
2671 | pci_disable_device (pdev); | |
2672 | device_unregister (&dev->gadget.dev); | |
2673 | device_remove_file (&pdev->dev, &dev_attr_registers); | |
2674 | pci_set_drvdata (pdev, NULL); | |
2675 | ||
2676 | INFO (dev, "unbind\n"); | |
1da177e4 LT |
2677 | } |
2678 | ||
2679 | /* wrap this driver around the specified device, but | |
2680 | * don't respond over USB until a gadget driver binds to us. | |
2681 | */ | |
2682 | ||
2683 | static int net2280_probe (struct pci_dev *pdev, const struct pci_device_id *id) | |
2684 | { | |
2685 | struct net2280 *dev; | |
2686 | unsigned long resource, len; | |
2687 | void __iomem *base = NULL; | |
2688 | int retval, i; | |
1da177e4 | 2689 | |
1da177e4 | 2690 | /* alloc, and start init */ |
e94b1766 | 2691 | dev = kzalloc (sizeof *dev, GFP_KERNEL); |
1da177e4 LT |
2692 | if (dev == NULL){ |
2693 | retval = -ENOMEM; | |
2694 | goto done; | |
2695 | } | |
2696 | ||
9fb81ce6 | 2697 | pci_set_drvdata (pdev, dev); |
1da177e4 LT |
2698 | spin_lock_init (&dev->lock); |
2699 | dev->pdev = pdev; | |
2700 | dev->gadget.ops = &net2280_ops; | |
2701 | dev->gadget.is_dualspeed = 1; | |
2702 | ||
2703 | /* the "gadget" abstracts/virtualizes the controller */ | |
0031a06e | 2704 | dev_set_name(&dev->gadget.dev, "gadget"); |
1da177e4 LT |
2705 | dev->gadget.dev.parent = &pdev->dev; |
2706 | dev->gadget.dev.dma_mask = pdev->dev.dma_mask; | |
2707 | dev->gadget.dev.release = gadget_release; | |
2708 | dev->gadget.name = driver_name; | |
2709 | ||
2710 | /* now all the pci goodies ... */ | |
2711 | if (pci_enable_device (pdev) < 0) { | |
901b3d75 | 2712 | retval = -ENODEV; |
1da177e4 LT |
2713 | goto done; |
2714 | } | |
2715 | dev->enabled = 1; | |
2716 | ||
2717 | /* BAR 0 holds all the registers | |
2718 | * BAR 1 is 8051 memory; unused here (note erratum 0103) | |
2719 | * BAR 2 is fifo memory; unused here | |
2720 | */ | |
2721 | resource = pci_resource_start (pdev, 0); | |
2722 | len = pci_resource_len (pdev, 0); | |
2723 | if (!request_mem_region (resource, len, driver_name)) { | |
2724 | DEBUG (dev, "controller already in use\n"); | |
2725 | retval = -EBUSY; | |
2726 | goto done; | |
2727 | } | |
2728 | dev->region = 1; | |
2729 | ||
901b3d75 DB |
2730 | /* FIXME provide firmware download interface to put |
2731 | * 8051 code into the chip, e.g. to turn on PCI PM. | |
2732 | */ | |
2733 | ||
1da177e4 LT |
2734 | base = ioremap_nocache (resource, len); |
2735 | if (base == NULL) { | |
2736 | DEBUG (dev, "can't map memory\n"); | |
2737 | retval = -EFAULT; | |
2738 | goto done; | |
2739 | } | |
2740 | dev->regs = (struct net2280_regs __iomem *) base; | |
2741 | dev->usb = (struct net2280_usb_regs __iomem *) (base + 0x0080); | |
2742 | dev->pci = (struct net2280_pci_regs __iomem *) (base + 0x0100); | |
2743 | dev->dma = (struct net2280_dma_regs __iomem *) (base + 0x0180); | |
2744 | dev->dep = (struct net2280_dep_regs __iomem *) (base + 0x0200); | |
2745 | dev->epregs = (struct net2280_ep_regs __iomem *) (base + 0x0300); | |
2746 | ||
2747 | /* put into initial config, link up all endpoints */ | |
2748 | writel (0, &dev->usb->usbctl); | |
2749 | usb_reset (dev); | |
2750 | usb_reinit (dev); | |
2751 | ||
2752 | /* irq setup after old hardware is cleaned up */ | |
2753 | if (!pdev->irq) { | |
2754 | ERROR (dev, "No IRQ. Check PCI setup!\n"); | |
2755 | retval = -ENODEV; | |
2756 | goto done; | |
2757 | } | |
c6387a48 | 2758 | |
d54b5caa | 2759 | if (request_irq (pdev->irq, net2280_irq, IRQF_SHARED, driver_name, dev) |
1da177e4 | 2760 | != 0) { |
c6387a48 | 2761 | ERROR (dev, "request interrupt %d failed\n", pdev->irq); |
1da177e4 LT |
2762 | retval = -EBUSY; |
2763 | goto done; | |
2764 | } | |
2765 | dev->got_irq = 1; | |
2766 | ||
2767 | /* DMA setup */ | |
2768 | /* NOTE: we know only the 32 LSBs of dma addresses may be nonzero */ | |
2769 | dev->requests = pci_pool_create ("requests", pdev, | |
2770 | sizeof (struct net2280_dma), | |
2771 | 0 /* no alignment requirements */, | |
2772 | 0 /* or page-crossing issues */); | |
2773 | if (!dev->requests) { | |
2774 | DEBUG (dev, "can't get request pool\n"); | |
2775 | retval = -ENOMEM; | |
2776 | goto done; | |
2777 | } | |
2778 | for (i = 1; i < 5; i++) { | |
2779 | struct net2280_dma *td; | |
2780 | ||
2781 | td = pci_pool_alloc (dev->requests, GFP_KERNEL, | |
2782 | &dev->ep [i].td_dma); | |
2783 | if (!td) { | |
2784 | DEBUG (dev, "can't get dummy %d\n", i); | |
2785 | retval = -ENOMEM; | |
2786 | goto done; | |
2787 | } | |
2788 | td->dmacount = 0; /* not VALID */ | |
551509d2 | 2789 | td->dmaaddr = cpu_to_le32 (DMA_ADDR_INVALID); |
1da177e4 LT |
2790 | td->dmadesc = td->dmaaddr; |
2791 | dev->ep [i].dummy = td; | |
2792 | } | |
2793 | ||
2794 | /* enable lower-overhead pci memory bursts during DMA */ | |
2795 | writel ( (1 << DMA_MEMORY_WRITE_AND_INVALIDATE_ENABLE) | |
2796 | // 256 write retries may not be enough... | |
2797 | // | (1 << PCI_RETRY_ABORT_ENABLE) | |
2798 | | (1 << DMA_READ_MULTIPLE_ENABLE) | |
2799 | | (1 << DMA_READ_LINE_ENABLE) | |
2800 | , &dev->pci->pcimstctl); | |
2801 | /* erratum 0115 shouldn't appear: Linux inits PCI_LATENCY_TIMER */ | |
2802 | pci_set_master (pdev); | |
694625c0 | 2803 | pci_try_set_mwi (pdev); |
1da177e4 LT |
2804 | |
2805 | /* ... also flushes any posted pci writes */ | |
2806 | dev->chiprev = get_idx_reg (dev->regs, REG_CHIPREV) & 0xffff; | |
2807 | ||
2808 | /* done */ | |
1da177e4 | 2809 | INFO (dev, "%s\n", driver_desc); |
c6387a48 DM |
2810 | INFO (dev, "irq %d, pci mem %p, chip rev %04x\n", |
2811 | pdev->irq, base, dev->chiprev); | |
1da177e4 LT |
2812 | INFO (dev, "version: " DRIVER_VERSION "; dma %s\n", |
2813 | use_dma | |
2814 | ? (use_dma_chaining ? "chaining" : "enabled") | |
2815 | : "disabled"); | |
b3899dac JG |
2816 | retval = device_register (&dev->gadget.dev); |
2817 | if (retval) goto done; | |
2818 | retval = device_create_file (&pdev->dev, &dev_attr_registers); | |
2819 | if (retval) goto done; | |
1da177e4 | 2820 | |
0f91349b SAS |
2821 | retval = usb_add_gadget_udc(&pdev->dev, &dev->gadget); |
2822 | if (retval) | |
2823 | goto done; | |
1da177e4 LT |
2824 | return 0; |
2825 | ||
2826 | done: | |
2827 | if (dev) | |
2828 | net2280_remove (pdev); | |
2829 | return retval; | |
2830 | } | |
2831 | ||
2d61bde7 AS |
2832 | /* make sure the board is quiescent; otherwise it will continue |
2833 | * generating IRQs across the upcoming reboot. | |
2834 | */ | |
2835 | ||
2836 | static void net2280_shutdown (struct pci_dev *pdev) | |
2837 | { | |
2838 | struct net2280 *dev = pci_get_drvdata (pdev); | |
2839 | ||
2840 | /* disable IRQs */ | |
2841 | writel (0, &dev->regs->pciirqenb0); | |
2842 | writel (0, &dev->regs->pciirqenb1); | |
2843 | ||
2844 | /* disable the pullup so the host will think we're gone */ | |
2845 | writel (0, &dev->usb->usbctl); | |
2846 | } | |
2847 | ||
1da177e4 LT |
2848 | |
2849 | /*-------------------------------------------------------------------------*/ | |
2850 | ||
901b3d75 DB |
2851 | static const struct pci_device_id pci_ids [] = { { |
2852 | .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), | |
2853 | .class_mask = ~0, | |
1da177e4 LT |
2854 | .vendor = 0x17cc, |
2855 | .device = 0x2280, | |
2856 | .subvendor = PCI_ANY_ID, | |
2857 | .subdevice = PCI_ANY_ID, | |
950ee4c8 | 2858 | }, { |
901b3d75 DB |
2859 | .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), |
2860 | .class_mask = ~0, | |
950ee4c8 GL |
2861 | .vendor = 0x17cc, |
2862 | .device = 0x2282, | |
2863 | .subvendor = PCI_ANY_ID, | |
2864 | .subdevice = PCI_ANY_ID, | |
1da177e4 LT |
2865 | |
2866 | }, { /* end: all zeroes */ } | |
2867 | }; | |
2868 | MODULE_DEVICE_TABLE (pci, pci_ids); | |
2869 | ||
2870 | /* pci driver glue; this is a "new style" PCI driver module */ | |
2871 | static struct pci_driver net2280_pci_driver = { | |
2872 | .name = (char *) driver_name, | |
2873 | .id_table = pci_ids, | |
2874 | ||
2875 | .probe = net2280_probe, | |
2876 | .remove = net2280_remove, | |
2d61bde7 | 2877 | .shutdown = net2280_shutdown, |
1da177e4 LT |
2878 | |
2879 | /* FIXME add power management support */ | |
2880 | }; | |
2881 | ||
2882 | MODULE_DESCRIPTION (DRIVER_DESC); | |
2883 | MODULE_AUTHOR ("David Brownell"); | |
2884 | MODULE_LICENSE ("GPL"); | |
2885 | ||
2886 | static int __init init (void) | |
2887 | { | |
2888 | if (!use_dma) | |
2889 | use_dma_chaining = 0; | |
2890 | return pci_register_driver (&net2280_pci_driver); | |
2891 | } | |
2892 | module_init (init); | |
2893 | ||
2894 | static void __exit cleanup (void) | |
2895 | { | |
2896 | pci_unregister_driver (&net2280_pci_driver); | |
2897 | } | |
2898 | module_exit (cleanup); |