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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 | |
fa06920a | 12 | * the Mass Storage, Serial, and Ethernet/RNDIS gadget drivers |
1da177e4 LT |
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> | |
1da177e4 LT |
62 | #include <asm/unaligned.h> |
63 | ||
64 | ||
950ee4c8 GL |
65 | #define DRIVER_DESC "PLX NET228x USB Peripheral Controller" |
66 | #define DRIVER_VERSION "2005 Sept 27" | |
1da177e4 LT |
67 | |
68 | #define DMA_ADDR_INVALID (~(dma_addr_t)0) | |
69 | #define EP_DONTUSE 13 /* nonzero */ | |
70 | ||
71 | #define USE_RDK_LEDS /* GPIO pins control three LEDs */ | |
72 | ||
73 | ||
74 | static const char driver_name [] = "net2280"; | |
75 | static const char driver_desc [] = DRIVER_DESC; | |
76 | ||
77 | static const char ep0name [] = "ep0"; | |
901b3d75 | 78 | static const char *const ep_name [] = { |
1da177e4 LT |
79 | ep0name, |
80 | "ep-a", "ep-b", "ep-c", "ep-d", | |
81 | "ep-e", "ep-f", | |
82 | }; | |
83 | ||
84 | /* use_dma -- general goodness, fewer interrupts, less cpu load (vs PIO) | |
85 | * use_dma_chaining -- dma descriptor queueing gives even more irq reduction | |
86 | * | |
87 | * The net2280 DMA engines are not tightly integrated with their FIFOs; | |
88 | * not all cases are (yet) handled well in this driver or the silicon. | |
89 | * Some gadget drivers work better with the dma support here than others. | |
90 | * These two parameters let you use PIO or more aggressive DMA. | |
91 | */ | |
90ab5ee9 RR |
92 | static bool use_dma = 1; |
93 | static bool use_dma_chaining = 0; | |
1da177e4 LT |
94 | |
95 | /* "modprobe net2280 use_dma=n" etc */ | |
96 | module_param (use_dma, bool, S_IRUGO); | |
97 | module_param (use_dma_chaining, bool, S_IRUGO); | |
98 | ||
99 | ||
100 | /* mode 0 == ep-{a,b,c,d} 1K fifo each | |
101 | * mode 1 == ep-{a,b} 2K fifo each, ep-{c,d} unavailable | |
102 | * mode 2 == ep-a 2K fifo, ep-{b,c} 1K each, ep-d unavailable | |
103 | */ | |
104 | static ushort fifo_mode = 0; | |
105 | ||
106 | /* "modprobe net2280 fifo_mode=1" etc */ | |
107 | module_param (fifo_mode, ushort, 0644); | |
108 | ||
109 | /* enable_suspend -- When enabled, the driver will respond to | |
110 | * USB suspend requests by powering down the NET2280. Otherwise, | |
25985edc | 111 | * USB suspend requests will be ignored. This is acceptable for |
950ee4c8 | 112 | * self-powered devices |
1da177e4 | 113 | */ |
90ab5ee9 | 114 | static bool enable_suspend = 0; |
1da177e4 LT |
115 | |
116 | /* "modprobe net2280 enable_suspend=1" etc */ | |
117 | module_param (enable_suspend, bool, S_IRUGO); | |
118 | ||
119 | ||
120 | #define DIR_STRING(bAddress) (((bAddress) & USB_DIR_IN) ? "in" : "out") | |
121 | ||
122 | #if defined(CONFIG_USB_GADGET_DEBUG_FILES) || defined (DEBUG) | |
123 | static char *type_string (u8 bmAttributes) | |
124 | { | |
125 | switch ((bmAttributes) & USB_ENDPOINT_XFERTYPE_MASK) { | |
126 | case USB_ENDPOINT_XFER_BULK: return "bulk"; | |
127 | case USB_ENDPOINT_XFER_ISOC: return "iso"; | |
128 | case USB_ENDPOINT_XFER_INT: return "intr"; | |
129 | }; | |
130 | return "control"; | |
131 | } | |
132 | #endif | |
133 | ||
134 | #include "net2280.h" | |
135 | ||
551509d2 HH |
136 | #define valid_bit cpu_to_le32 (1 << VALID_BIT) |
137 | #define dma_done_ie cpu_to_le32 (1 << DMA_DONE_INTERRUPT_ENABLE) | |
1da177e4 LT |
138 | |
139 | /*-------------------------------------------------------------------------*/ | |
140 | ||
141 | static int | |
142 | net2280_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) | |
143 | { | |
144 | struct net2280 *dev; | |
145 | struct net2280_ep *ep; | |
146 | u32 max, tmp; | |
147 | unsigned long flags; | |
148 | ||
149 | ep = container_of (_ep, struct net2280_ep, ep); | |
150 | if (!_ep || !desc || ep->desc || _ep->name == ep0name | |
151 | || desc->bDescriptorType != USB_DT_ENDPOINT) | |
152 | return -EINVAL; | |
153 | dev = ep->dev; | |
154 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) | |
155 | return -ESHUTDOWN; | |
156 | ||
157 | /* erratum 0119 workaround ties up an endpoint number */ | |
158 | if ((desc->bEndpointAddress & 0x0f) == EP_DONTUSE) | |
159 | return -EDOM; | |
160 | ||
161 | /* sanity check ep-e/ep-f since their fifos are small */ | |
29cc8897 | 162 | max = usb_endpoint_maxp (desc) & 0x1fff; |
1da177e4 LT |
163 | if (ep->num > 4 && max > 64) |
164 | return -ERANGE; | |
165 | ||
166 | spin_lock_irqsave (&dev->lock, flags); | |
167 | _ep->maxpacket = max & 0x7ff; | |
168 | ep->desc = desc; | |
169 | ||
170 | /* ep_reset() has already been called */ | |
171 | ep->stopped = 0; | |
8066134f | 172 | ep->wedged = 0; |
1da177e4 LT |
173 | ep->out_overflow = 0; |
174 | ||
175 | /* set speed-dependent max packet; may kick in high bandwidth */ | |
176 | set_idx_reg (dev->regs, REG_EP_MAXPKT (dev, ep->num), max); | |
177 | ||
178 | /* FIFO lines can't go to different packets. PIO is ok, so | |
179 | * use it instead of troublesome (non-bulk) multi-packet DMA. | |
180 | */ | |
181 | if (ep->dma && (max % 4) != 0 && use_dma_chaining) { | |
182 | DEBUG (ep->dev, "%s, no dma for maxpacket %d\n", | |
183 | ep->ep.name, ep->ep.maxpacket); | |
184 | ep->dma = NULL; | |
185 | } | |
186 | ||
187 | /* set type, direction, address; reset fifo counters */ | |
188 | writel ((1 << FIFO_FLUSH), &ep->regs->ep_stat); | |
189 | tmp = (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK); | |
190 | if (tmp == USB_ENDPOINT_XFER_INT) { | |
191 | /* erratum 0105 workaround prevents hs NYET */ | |
192 | if (dev->chiprev == 0100 | |
193 | && dev->gadget.speed == USB_SPEED_HIGH | |
194 | && !(desc->bEndpointAddress & USB_DIR_IN)) | |
195 | writel ((1 << CLEAR_NAK_OUT_PACKETS_MODE), | |
196 | &ep->regs->ep_rsp); | |
197 | } else if (tmp == USB_ENDPOINT_XFER_BULK) { | |
198 | /* catch some particularly blatant driver bugs */ | |
199 | if ((dev->gadget.speed == USB_SPEED_HIGH | |
200 | && max != 512) | |
201 | || (dev->gadget.speed == USB_SPEED_FULL | |
202 | && max > 64)) { | |
203 | spin_unlock_irqrestore (&dev->lock, flags); | |
204 | return -ERANGE; | |
205 | } | |
206 | } | |
207 | ep->is_iso = (tmp == USB_ENDPOINT_XFER_ISOC) ? 1 : 0; | |
208 | tmp <<= ENDPOINT_TYPE; | |
209 | tmp |= desc->bEndpointAddress; | |
210 | tmp |= (4 << ENDPOINT_BYTE_COUNT); /* default full fifo lines */ | |
211 | tmp |= 1 << ENDPOINT_ENABLE; | |
212 | wmb (); | |
213 | ||
214 | /* for OUT transfers, block the rx fifo until a read is posted */ | |
215 | ep->is_in = (tmp & USB_DIR_IN) != 0; | |
216 | if (!ep->is_in) | |
217 | writel ((1 << SET_NAK_OUT_PACKETS), &ep->regs->ep_rsp); | |
950ee4c8 | 218 | else if (dev->pdev->device != 0x2280) { |
901b3d75 DB |
219 | /* Added for 2282, Don't use nak packets on an in endpoint, |
220 | * this was ignored on 2280 | |
221 | */ | |
950ee4c8 GL |
222 | writel ((1 << CLEAR_NAK_OUT_PACKETS) |
223 | | (1 << CLEAR_NAK_OUT_PACKETS_MODE), &ep->regs->ep_rsp); | |
224 | } | |
1da177e4 LT |
225 | |
226 | writel (tmp, &ep->regs->ep_cfg); | |
227 | ||
228 | /* enable irqs */ | |
229 | if (!ep->dma) { /* pio, per-packet */ | |
230 | tmp = (1 << ep->num) | readl (&dev->regs->pciirqenb0); | |
231 | writel (tmp, &dev->regs->pciirqenb0); | |
232 | ||
233 | tmp = (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE) | |
950ee4c8 GL |
234 | | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE); |
235 | if (dev->pdev->device == 0x2280) | |
236 | tmp |= readl (&ep->regs->ep_irqenb); | |
1da177e4 LT |
237 | writel (tmp, &ep->regs->ep_irqenb); |
238 | } else { /* dma, per-request */ | |
239 | tmp = (1 << (8 + ep->num)); /* completion */ | |
240 | tmp |= readl (&dev->regs->pciirqenb1); | |
241 | writel (tmp, &dev->regs->pciirqenb1); | |
242 | ||
243 | /* for short OUT transfers, dma completions can't | |
244 | * advance the queue; do it pio-style, by hand. | |
245 | * NOTE erratum 0112 workaround #2 | |
246 | */ | |
247 | if ((desc->bEndpointAddress & USB_DIR_IN) == 0) { | |
248 | tmp = (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT_ENABLE); | |
249 | writel (tmp, &ep->regs->ep_irqenb); | |
250 | ||
251 | tmp = (1 << ep->num) | readl (&dev->regs->pciirqenb0); | |
252 | writel (tmp, &dev->regs->pciirqenb0); | |
253 | } | |
254 | } | |
255 | ||
256 | tmp = desc->bEndpointAddress; | |
257 | DEBUG (dev, "enabled %s (ep%d%s-%s) %s max %04x\n", | |
258 | _ep->name, tmp & 0x0f, DIR_STRING (tmp), | |
259 | type_string (desc->bmAttributes), | |
260 | ep->dma ? "dma" : "pio", max); | |
261 | ||
262 | /* pci writes may still be posted */ | |
263 | spin_unlock_irqrestore (&dev->lock, flags); | |
264 | return 0; | |
265 | } | |
266 | ||
267 | static int handshake (u32 __iomem *ptr, u32 mask, u32 done, int usec) | |
268 | { | |
269 | u32 result; | |
270 | ||
271 | do { | |
272 | result = readl (ptr); | |
273 | if (result == ~(u32)0) /* "device unplugged" */ | |
274 | return -ENODEV; | |
275 | result &= mask; | |
276 | if (result == done) | |
277 | return 0; | |
278 | udelay (1); | |
279 | usec--; | |
280 | } while (usec > 0); | |
281 | return -ETIMEDOUT; | |
282 | } | |
283 | ||
901b3d75 | 284 | static const struct usb_ep_ops net2280_ep_ops; |
1da177e4 LT |
285 | |
286 | static void ep_reset (struct net2280_regs __iomem *regs, struct net2280_ep *ep) | |
287 | { | |
288 | u32 tmp; | |
289 | ||
290 | ep->desc = NULL; | |
291 | INIT_LIST_HEAD (&ep->queue); | |
292 | ||
293 | ep->ep.maxpacket = ~0; | |
294 | ep->ep.ops = &net2280_ep_ops; | |
295 | ||
296 | /* disable the dma, irqs, endpoint... */ | |
297 | if (ep->dma) { | |
298 | writel (0, &ep->dma->dmactl); | |
299 | writel ( (1 << DMA_SCATTER_GATHER_DONE_INTERRUPT) | |
300 | | (1 << DMA_TRANSACTION_DONE_INTERRUPT) | |
301 | | (1 << DMA_ABORT) | |
302 | , &ep->dma->dmastat); | |
303 | ||
304 | tmp = readl (®s->pciirqenb0); | |
305 | tmp &= ~(1 << ep->num); | |
306 | writel (tmp, ®s->pciirqenb0); | |
307 | } else { | |
308 | tmp = readl (®s->pciirqenb1); | |
309 | tmp &= ~(1 << (8 + ep->num)); /* completion */ | |
310 | writel (tmp, ®s->pciirqenb1); | |
311 | } | |
312 | writel (0, &ep->regs->ep_irqenb); | |
313 | ||
314 | /* init to our chosen defaults, notably so that we NAK OUT | |
315 | * packets until the driver queues a read (+note erratum 0112) | |
316 | */ | |
950ee4c8 GL |
317 | if (!ep->is_in || ep->dev->pdev->device == 0x2280) { |
318 | tmp = (1 << SET_NAK_OUT_PACKETS_MODE) | |
1da177e4 LT |
319 | | (1 << SET_NAK_OUT_PACKETS) |
320 | | (1 << CLEAR_EP_HIDE_STATUS_PHASE) | |
321 | | (1 << CLEAR_INTERRUPT_MODE); | |
950ee4c8 GL |
322 | } else { |
323 | /* added for 2282 */ | |
324 | tmp = (1 << CLEAR_NAK_OUT_PACKETS_MODE) | |
325 | | (1 << CLEAR_NAK_OUT_PACKETS) | |
326 | | (1 << CLEAR_EP_HIDE_STATUS_PHASE) | |
327 | | (1 << CLEAR_INTERRUPT_MODE); | |
328 | } | |
1da177e4 LT |
329 | |
330 | if (ep->num != 0) { | |
331 | tmp |= (1 << CLEAR_ENDPOINT_TOGGLE) | |
332 | | (1 << CLEAR_ENDPOINT_HALT); | |
333 | } | |
334 | writel (tmp, &ep->regs->ep_rsp); | |
335 | ||
336 | /* scrub most status bits, and flush any fifo state */ | |
950ee4c8 GL |
337 | if (ep->dev->pdev->device == 0x2280) |
338 | tmp = (1 << FIFO_OVERFLOW) | |
339 | | (1 << FIFO_UNDERFLOW); | |
340 | else | |
341 | tmp = 0; | |
342 | ||
343 | writel (tmp | (1 << TIMEOUT) | |
1da177e4 LT |
344 | | (1 << USB_STALL_SENT) |
345 | | (1 << USB_IN_NAK_SENT) | |
346 | | (1 << USB_IN_ACK_RCVD) | |
347 | | (1 << USB_OUT_PING_NAK_SENT) | |
348 | | (1 << USB_OUT_ACK_SENT) | |
1da177e4 LT |
349 | | (1 << FIFO_FLUSH) |
350 | | (1 << SHORT_PACKET_OUT_DONE_INTERRUPT) | |
351 | | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT) | |
352 | | (1 << DATA_PACKET_RECEIVED_INTERRUPT) | |
353 | | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT) | |
354 | | (1 << DATA_OUT_PING_TOKEN_INTERRUPT) | |
355 | | (1 << DATA_IN_TOKEN_INTERRUPT) | |
356 | , &ep->regs->ep_stat); | |
357 | ||
358 | /* fifo size is handled separately */ | |
359 | } | |
360 | ||
361 | static void nuke (struct net2280_ep *); | |
362 | ||
363 | static int net2280_disable (struct usb_ep *_ep) | |
364 | { | |
365 | struct net2280_ep *ep; | |
366 | unsigned long flags; | |
367 | ||
368 | ep = container_of (_ep, struct net2280_ep, ep); | |
369 | if (!_ep || !ep->desc || _ep->name == ep0name) | |
370 | return -EINVAL; | |
371 | ||
372 | spin_lock_irqsave (&ep->dev->lock, flags); | |
373 | nuke (ep); | |
374 | ep_reset (ep->dev->regs, ep); | |
375 | ||
376 | VDEBUG (ep->dev, "disabled %s %s\n", | |
377 | ep->dma ? "dma" : "pio", _ep->name); | |
378 | ||
379 | /* synch memory views with the device */ | |
380 | (void) readl (&ep->regs->ep_cfg); | |
381 | ||
382 | if (use_dma && !ep->dma && ep->num >= 1 && ep->num <= 4) | |
383 | ep->dma = &ep->dev->dma [ep->num - 1]; | |
384 | ||
385 | spin_unlock_irqrestore (&ep->dev->lock, flags); | |
386 | return 0; | |
387 | } | |
388 | ||
389 | /*-------------------------------------------------------------------------*/ | |
390 | ||
391 | static struct usb_request * | |
55016f10 | 392 | net2280_alloc_request (struct usb_ep *_ep, gfp_t gfp_flags) |
1da177e4 LT |
393 | { |
394 | struct net2280_ep *ep; | |
395 | struct net2280_request *req; | |
396 | ||
397 | if (!_ep) | |
398 | return NULL; | |
399 | ep = container_of (_ep, struct net2280_ep, ep); | |
400 | ||
7039f422 | 401 | req = kzalloc(sizeof(*req), gfp_flags); |
1da177e4 LT |
402 | if (!req) |
403 | return NULL; | |
404 | ||
1da177e4 LT |
405 | req->req.dma = DMA_ADDR_INVALID; |
406 | INIT_LIST_HEAD (&req->queue); | |
407 | ||
408 | /* this dma descriptor may be swapped with the previous dummy */ | |
409 | if (ep->dma) { | |
410 | struct net2280_dma *td; | |
411 | ||
412 | td = pci_pool_alloc (ep->dev->requests, gfp_flags, | |
413 | &req->td_dma); | |
414 | if (!td) { | |
415 | kfree (req); | |
416 | return NULL; | |
417 | } | |
418 | td->dmacount = 0; /* not VALID */ | |
551509d2 | 419 | td->dmaaddr = cpu_to_le32 (DMA_ADDR_INVALID); |
1da177e4 LT |
420 | td->dmadesc = td->dmaaddr; |
421 | req->td = td; | |
422 | } | |
423 | return &req->req; | |
424 | } | |
425 | ||
426 | static void | |
427 | net2280_free_request (struct usb_ep *_ep, struct usb_request *_req) | |
428 | { | |
429 | struct net2280_ep *ep; | |
430 | struct net2280_request *req; | |
431 | ||
432 | ep = container_of (_ep, struct net2280_ep, ep); | |
433 | if (!_ep || !_req) | |
434 | return; | |
435 | ||
436 | req = container_of (_req, struct net2280_request, req); | |
437 | WARN_ON (!list_empty (&req->queue)); | |
438 | if (req->td) | |
439 | pci_pool_free (ep->dev->requests, req->td, req->td_dma); | |
440 | kfree (req); | |
441 | } | |
442 | ||
443 | /*-------------------------------------------------------------------------*/ | |
444 | ||
1da177e4 LT |
445 | /* load a packet into the fifo we use for usb IN transfers. |
446 | * works for all endpoints. | |
447 | * | |
448 | * NOTE: pio with ep-a..ep-d could stuff multiple packets into the fifo | |
449 | * at a time, but this code is simpler because it knows it only writes | |
450 | * one packet. ep-a..ep-d should use dma instead. | |
451 | */ | |
452 | static void | |
453 | write_fifo (struct net2280_ep *ep, struct usb_request *req) | |
454 | { | |
455 | struct net2280_ep_regs __iomem *regs = ep->regs; | |
456 | u8 *buf; | |
457 | u32 tmp; | |
458 | unsigned count, total; | |
459 | ||
460 | /* INVARIANT: fifo is currently empty. (testable) */ | |
461 | ||
462 | if (req) { | |
463 | buf = req->buf + req->actual; | |
464 | prefetch (buf); | |
465 | total = req->length - req->actual; | |
466 | } else { | |
467 | total = 0; | |
468 | buf = NULL; | |
469 | } | |
470 | ||
471 | /* write just one packet at a time */ | |
472 | count = ep->ep.maxpacket; | |
473 | if (count > total) /* min() cannot be used on a bitfield */ | |
474 | count = total; | |
475 | ||
476 | VDEBUG (ep->dev, "write %s fifo (IN) %d bytes%s req %p\n", | |
477 | ep->ep.name, count, | |
478 | (count != ep->ep.maxpacket) ? " (short)" : "", | |
479 | req); | |
480 | while (count >= 4) { | |
481 | /* NOTE be careful if you try to align these. fifo lines | |
482 | * should normally be full (4 bytes) and successive partial | |
483 | * lines are ok only in certain cases. | |
484 | */ | |
485 | tmp = get_unaligned ((u32 *)buf); | |
486 | cpu_to_le32s (&tmp); | |
487 | writel (tmp, ®s->ep_data); | |
488 | buf += 4; | |
489 | count -= 4; | |
490 | } | |
491 | ||
492 | /* last fifo entry is "short" unless we wrote a full packet. | |
493 | * also explicitly validate last word in (periodic) transfers | |
494 | * when maxpacket is not a multiple of 4 bytes. | |
495 | */ | |
496 | if (count || total < ep->ep.maxpacket) { | |
497 | tmp = count ? get_unaligned ((u32 *)buf) : count; | |
498 | cpu_to_le32s (&tmp); | |
499 | set_fifo_bytecount (ep, count & 0x03); | |
500 | writel (tmp, ®s->ep_data); | |
501 | } | |
502 | ||
503 | /* pci writes may still be posted */ | |
504 | } | |
505 | ||
506 | /* work around erratum 0106: PCI and USB race over the OUT fifo. | |
507 | * caller guarantees chiprev 0100, out endpoint is NAKing, and | |
508 | * there's no real data in the fifo. | |
509 | * | |
510 | * NOTE: also used in cases where that erratum doesn't apply: | |
511 | * where the host wrote "too much" data to us. | |
512 | */ | |
513 | static void out_flush (struct net2280_ep *ep) | |
514 | { | |
515 | u32 __iomem *statp; | |
516 | u32 tmp; | |
517 | ||
518 | ASSERT_OUT_NAKING (ep); | |
519 | ||
520 | statp = &ep->regs->ep_stat; | |
521 | writel ( (1 << DATA_OUT_PING_TOKEN_INTERRUPT) | |
522 | | (1 << DATA_PACKET_RECEIVED_INTERRUPT) | |
523 | , statp); | |
524 | writel ((1 << FIFO_FLUSH), statp); | |
525 | mb (); | |
526 | tmp = readl (statp); | |
527 | if (tmp & (1 << DATA_OUT_PING_TOKEN_INTERRUPT) | |
528 | /* high speed did bulk NYET; fifo isn't filling */ | |
529 | && ep->dev->gadget.speed == USB_SPEED_FULL) { | |
530 | unsigned usec; | |
531 | ||
532 | usec = 50; /* 64 byte bulk/interrupt */ | |
533 | handshake (statp, (1 << USB_OUT_PING_NAK_SENT), | |
534 | (1 << USB_OUT_PING_NAK_SENT), usec); | |
535 | /* NAK done; now CLEAR_NAK_OUT_PACKETS is safe */ | |
536 | } | |
537 | } | |
538 | ||
539 | /* unload packet(s) from the fifo we use for usb OUT transfers. | |
540 | * returns true iff the request completed, because of short packet | |
541 | * or the request buffer having filled with full packets. | |
542 | * | |
543 | * for ep-a..ep-d this will read multiple packets out when they | |
544 | * have been accepted. | |
545 | */ | |
546 | static int | |
547 | read_fifo (struct net2280_ep *ep, struct net2280_request *req) | |
548 | { | |
549 | struct net2280_ep_regs __iomem *regs = ep->regs; | |
550 | u8 *buf = req->req.buf + req->req.actual; | |
551 | unsigned count, tmp, is_short; | |
552 | unsigned cleanup = 0, prevent = 0; | |
553 | ||
554 | /* erratum 0106 ... packets coming in during fifo reads might | |
555 | * be incompletely rejected. not all cases have workarounds. | |
556 | */ | |
557 | if (ep->dev->chiprev == 0x0100 | |
558 | && ep->dev->gadget.speed == USB_SPEED_FULL) { | |
559 | udelay (1); | |
560 | tmp = readl (&ep->regs->ep_stat); | |
561 | if ((tmp & (1 << NAK_OUT_PACKETS))) | |
562 | cleanup = 1; | |
563 | else if ((tmp & (1 << FIFO_FULL))) { | |
564 | start_out_naking (ep); | |
565 | prevent = 1; | |
566 | } | |
567 | /* else: hope we don't see the problem */ | |
568 | } | |
569 | ||
570 | /* never overflow the rx buffer. the fifo reads packets until | |
571 | * it sees a short one; we might not be ready for them all. | |
572 | */ | |
573 | prefetchw (buf); | |
574 | count = readl (®s->ep_avail); | |
575 | if (unlikely (count == 0)) { | |
576 | udelay (1); | |
577 | tmp = readl (&ep->regs->ep_stat); | |
578 | count = readl (®s->ep_avail); | |
579 | /* handled that data already? */ | |
580 | if (count == 0 && (tmp & (1 << NAK_OUT_PACKETS)) == 0) | |
581 | return 0; | |
582 | } | |
583 | ||
584 | tmp = req->req.length - req->req.actual; | |
585 | if (count > tmp) { | |
586 | /* as with DMA, data overflow gets flushed */ | |
587 | if ((tmp % ep->ep.maxpacket) != 0) { | |
588 | ERROR (ep->dev, | |
589 | "%s out fifo %d bytes, expected %d\n", | |
590 | ep->ep.name, count, tmp); | |
591 | req->req.status = -EOVERFLOW; | |
592 | cleanup = 1; | |
593 | /* NAK_OUT_PACKETS will be set, so flushing is safe; | |
594 | * the next read will start with the next packet | |
595 | */ | |
596 | } /* else it's a ZLP, no worries */ | |
597 | count = tmp; | |
598 | } | |
599 | req->req.actual += count; | |
600 | ||
601 | is_short = (count == 0) || ((count % ep->ep.maxpacket) != 0); | |
602 | ||
603 | VDEBUG (ep->dev, "read %s fifo (OUT) %d bytes%s%s%s req %p %d/%d\n", | |
604 | ep->ep.name, count, is_short ? " (short)" : "", | |
605 | cleanup ? " flush" : "", prevent ? " nak" : "", | |
606 | req, req->req.actual, req->req.length); | |
607 | ||
608 | while (count >= 4) { | |
609 | tmp = readl (®s->ep_data); | |
610 | cpu_to_le32s (&tmp); | |
611 | put_unaligned (tmp, (u32 *)buf); | |
612 | buf += 4; | |
613 | count -= 4; | |
614 | } | |
615 | if (count) { | |
616 | tmp = readl (®s->ep_data); | |
617 | /* LE conversion is implicit here: */ | |
618 | do { | |
619 | *buf++ = (u8) tmp; | |
620 | tmp >>= 8; | |
621 | } while (--count); | |
622 | } | |
623 | if (cleanup) | |
624 | out_flush (ep); | |
625 | if (prevent) { | |
626 | writel ((1 << CLEAR_NAK_OUT_PACKETS), &ep->regs->ep_rsp); | |
627 | (void) readl (&ep->regs->ep_rsp); | |
628 | } | |
629 | ||
630 | return is_short || ((req->req.actual == req->req.length) | |
631 | && !req->req.zero); | |
632 | } | |
633 | ||
634 | /* fill out dma descriptor to match a given request */ | |
635 | static void | |
636 | fill_dma_desc (struct net2280_ep *ep, struct net2280_request *req, int valid) | |
637 | { | |
638 | struct net2280_dma *td = req->td; | |
639 | u32 dmacount = req->req.length; | |
640 | ||
641 | /* don't let DMA continue after a short OUT packet, | |
642 | * so overruns can't affect the next transfer. | |
643 | * in case of overruns on max-size packets, we can't | |
644 | * stop the fifo from filling but we can flush it. | |
645 | */ | |
646 | if (ep->is_in) | |
647 | dmacount |= (1 << DMA_DIRECTION); | |
901b3d75 DB |
648 | if ((!ep->is_in && (dmacount % ep->ep.maxpacket) != 0) |
649 | || ep->dev->pdev->device != 0x2280) | |
1da177e4 LT |
650 | dmacount |= (1 << END_OF_CHAIN); |
651 | ||
652 | req->valid = valid; | |
653 | if (valid) | |
654 | dmacount |= (1 << VALID_BIT); | |
655 | if (likely(!req->req.no_interrupt || !use_dma_chaining)) | |
656 | dmacount |= (1 << DMA_DONE_INTERRUPT_ENABLE); | |
657 | ||
658 | /* td->dmadesc = previously set by caller */ | |
659 | td->dmaaddr = cpu_to_le32 (req->req.dma); | |
660 | ||
661 | /* 2280 may be polling VALID_BIT through ep->dma->dmadesc */ | |
662 | wmb (); | |
da2bbdcc | 663 | td->dmacount = cpu_to_le32(dmacount); |
1da177e4 LT |
664 | } |
665 | ||
666 | static const u32 dmactl_default = | |
667 | (1 << DMA_SCATTER_GATHER_DONE_INTERRUPT) | |
668 | | (1 << DMA_CLEAR_COUNT_ENABLE) | |
669 | /* erratum 0116 workaround part 1 (use POLLING) */ | |
670 | | (POLL_100_USEC << DESCRIPTOR_POLLING_RATE) | |
671 | | (1 << DMA_VALID_BIT_POLLING_ENABLE) | |
672 | | (1 << DMA_VALID_BIT_ENABLE) | |
673 | | (1 << DMA_SCATTER_GATHER_ENABLE) | |
674 | /* erratum 0116 workaround part 2 (no AUTOSTART) */ | |
675 | | (1 << DMA_ENABLE); | |
676 | ||
677 | static inline void spin_stop_dma (struct net2280_dma_regs __iomem *dma) | |
678 | { | |
679 | handshake (&dma->dmactl, (1 << DMA_ENABLE), 0, 50); | |
680 | } | |
681 | ||
682 | static inline void stop_dma (struct net2280_dma_regs __iomem *dma) | |
683 | { | |
684 | writel (readl (&dma->dmactl) & ~(1 << DMA_ENABLE), &dma->dmactl); | |
685 | spin_stop_dma (dma); | |
686 | } | |
687 | ||
688 | static void start_queue (struct net2280_ep *ep, u32 dmactl, u32 td_dma) | |
689 | { | |
690 | struct net2280_dma_regs __iomem *dma = ep->dma; | |
950ee4c8 | 691 | unsigned int tmp = (1 << VALID_BIT) | (ep->is_in << DMA_DIRECTION); |
1da177e4 | 692 | |
950ee4c8 GL |
693 | if (ep->dev->pdev->device != 0x2280) |
694 | tmp |= (1 << END_OF_CHAIN); | |
695 | ||
696 | writel (tmp, &dma->dmacount); | |
1da177e4 LT |
697 | writel (readl (&dma->dmastat), &dma->dmastat); |
698 | ||
699 | writel (td_dma, &dma->dmadesc); | |
700 | writel (dmactl, &dma->dmactl); | |
701 | ||
702 | /* erratum 0116 workaround part 3: pci arbiter away from net2280 */ | |
703 | (void) readl (&ep->dev->pci->pcimstctl); | |
704 | ||
705 | writel ((1 << DMA_START), &dma->dmastat); | |
706 | ||
707 | if (!ep->is_in) | |
708 | stop_out_naking (ep); | |
709 | } | |
710 | ||
711 | static void start_dma (struct net2280_ep *ep, struct net2280_request *req) | |
712 | { | |
713 | u32 tmp; | |
714 | struct net2280_dma_regs __iomem *dma = ep->dma; | |
715 | ||
716 | /* FIXME can't use DMA for ZLPs */ | |
717 | ||
718 | /* on this path we "know" there's no dma active (yet) */ | |
719 | WARN_ON (readl (&dma->dmactl) & (1 << DMA_ENABLE)); | |
720 | writel (0, &ep->dma->dmactl); | |
721 | ||
722 | /* previous OUT packet might have been short */ | |
723 | if (!ep->is_in && ((tmp = readl (&ep->regs->ep_stat)) | |
901b3d75 | 724 | & (1 << NAK_OUT_PACKETS)) != 0) { |
1da177e4 LT |
725 | writel ((1 << SHORT_PACKET_TRANSFERRED_INTERRUPT), |
726 | &ep->regs->ep_stat); | |
727 | ||
728 | tmp = readl (&ep->regs->ep_avail); | |
729 | if (tmp) { | |
730 | writel (readl (&dma->dmastat), &dma->dmastat); | |
731 | ||
732 | /* transfer all/some fifo data */ | |
733 | writel (req->req.dma, &dma->dmaaddr); | |
734 | tmp = min (tmp, req->req.length); | |
735 | ||
736 | /* dma irq, faking scatterlist status */ | |
737 | req->td->dmacount = cpu_to_le32 (req->req.length - tmp); | |
738 | writel ((1 << DMA_DONE_INTERRUPT_ENABLE) | |
739 | | tmp, &dma->dmacount); | |
740 | req->td->dmadesc = 0; | |
741 | req->valid = 1; | |
742 | ||
743 | writel ((1 << DMA_ENABLE), &dma->dmactl); | |
744 | writel ((1 << DMA_START), &dma->dmastat); | |
745 | return; | |
746 | } | |
747 | } | |
748 | ||
749 | tmp = dmactl_default; | |
750 | ||
751 | /* force packet boundaries between dma requests, but prevent the | |
752 | * controller from automagically writing a last "short" packet | |
753 | * (zero length) unless the driver explicitly said to do that. | |
754 | */ | |
755 | if (ep->is_in) { | |
756 | if (likely ((req->req.length % ep->ep.maxpacket) != 0 | |
757 | || req->req.zero)) { | |
758 | tmp |= (1 << DMA_FIFO_VALIDATE); | |
759 | ep->in_fifo_validate = 1; | |
760 | } else | |
761 | ep->in_fifo_validate = 0; | |
762 | } | |
763 | ||
764 | /* init req->td, pointing to the current dummy */ | |
765 | req->td->dmadesc = cpu_to_le32 (ep->td_dma); | |
766 | fill_dma_desc (ep, req, 1); | |
767 | ||
768 | if (!use_dma_chaining) | |
551509d2 | 769 | req->td->dmacount |= cpu_to_le32 (1 << END_OF_CHAIN); |
1da177e4 LT |
770 | |
771 | start_queue (ep, tmp, req->td_dma); | |
772 | } | |
773 | ||
774 | static inline void | |
775 | queue_dma (struct net2280_ep *ep, struct net2280_request *req, int valid) | |
776 | { | |
777 | struct net2280_dma *end; | |
778 | dma_addr_t tmp; | |
779 | ||
780 | /* swap new dummy for old, link; fill and maybe activate */ | |
781 | end = ep->dummy; | |
782 | ep->dummy = req->td; | |
783 | req->td = end; | |
784 | ||
785 | tmp = ep->td_dma; | |
786 | ep->td_dma = req->td_dma; | |
787 | req->td_dma = tmp; | |
788 | ||
789 | end->dmadesc = cpu_to_le32 (ep->td_dma); | |
790 | ||
791 | fill_dma_desc (ep, req, valid); | |
792 | } | |
793 | ||
794 | static void | |
795 | done (struct net2280_ep *ep, struct net2280_request *req, int status) | |
796 | { | |
797 | struct net2280 *dev; | |
798 | unsigned stopped = ep->stopped; | |
799 | ||
800 | list_del_init (&req->queue); | |
801 | ||
802 | if (req->req.status == -EINPROGRESS) | |
803 | req->req.status = status; | |
804 | else | |
805 | status = req->req.status; | |
806 | ||
807 | dev = ep->dev; | |
ae4d7933 FB |
808 | if (ep->dma) |
809 | usb_gadget_unmap_request(&dev->gadget, &req->req, ep->is_in); | |
1da177e4 LT |
810 | |
811 | if (status && status != -ESHUTDOWN) | |
812 | VDEBUG (dev, "complete %s req %p stat %d len %u/%u\n", | |
813 | ep->ep.name, &req->req, status, | |
814 | req->req.actual, req->req.length); | |
815 | ||
816 | /* don't modify queue heads during completion callback */ | |
817 | ep->stopped = 1; | |
818 | spin_unlock (&dev->lock); | |
819 | req->req.complete (&ep->ep, &req->req); | |
820 | spin_lock (&dev->lock); | |
821 | ep->stopped = stopped; | |
822 | } | |
823 | ||
824 | /*-------------------------------------------------------------------------*/ | |
825 | ||
826 | static int | |
55016f10 | 827 | net2280_queue (struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) |
1da177e4 LT |
828 | { |
829 | struct net2280_request *req; | |
830 | struct net2280_ep *ep; | |
831 | struct net2280 *dev; | |
832 | unsigned long flags; | |
833 | ||
834 | /* we always require a cpu-view buffer, so that we can | |
835 | * always use pio (as fallback or whatever). | |
836 | */ | |
837 | req = container_of (_req, struct net2280_request, req); | |
838 | if (!_req || !_req->complete || !_req->buf | |
839 | || !list_empty (&req->queue)) | |
840 | return -EINVAL; | |
841 | if (_req->length > (~0 & DMA_BYTE_COUNT_MASK)) | |
842 | return -EDOM; | |
843 | ep = container_of (_ep, struct net2280_ep, ep); | |
844 | if (!_ep || (!ep->desc && ep->num != 0)) | |
845 | return -EINVAL; | |
846 | dev = ep->dev; | |
847 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) | |
848 | return -ESHUTDOWN; | |
849 | ||
850 | /* FIXME implement PIO fallback for ZLPs with DMA */ | |
851 | if (ep->dma && _req->length == 0) | |
852 | return -EOPNOTSUPP; | |
853 | ||
854 | /* set up dma mapping in case the caller didn't */ | |
ae4d7933 FB |
855 | if (ep->dma) { |
856 | int ret; | |
857 | ||
858 | ret = usb_gadget_map_request(&dev->gadget, _req, | |
859 | ep->is_in); | |
860 | if (ret) | |
861 | return ret; | |
1da177e4 LT |
862 | } |
863 | ||
864 | #if 0 | |
865 | VDEBUG (dev, "%s queue req %p, len %d buf %p\n", | |
866 | _ep->name, _req, _req->length, _req->buf); | |
867 | #endif | |
868 | ||
869 | spin_lock_irqsave (&dev->lock, flags); | |
870 | ||
871 | _req->status = -EINPROGRESS; | |
872 | _req->actual = 0; | |
873 | ||
874 | /* kickstart this i/o queue? */ | |
875 | if (list_empty (&ep->queue) && !ep->stopped) { | |
876 | /* use DMA if the endpoint supports it, else pio */ | |
877 | if (ep->dma) | |
878 | start_dma (ep, req); | |
879 | else { | |
880 | /* maybe there's no control data, just status ack */ | |
881 | if (ep->num == 0 && _req->length == 0) { | |
882 | allow_status (ep); | |
883 | done (ep, req, 0); | |
884 | VDEBUG (dev, "%s status ack\n", ep->ep.name); | |
885 | goto done; | |
886 | } | |
887 | ||
888 | /* PIO ... stuff the fifo, or unblock it. */ | |
889 | if (ep->is_in) | |
890 | write_fifo (ep, _req); | |
891 | else if (list_empty (&ep->queue)) { | |
892 | u32 s; | |
893 | ||
894 | /* OUT FIFO might have packet(s) buffered */ | |
895 | s = readl (&ep->regs->ep_stat); | |
896 | if ((s & (1 << FIFO_EMPTY)) == 0) { | |
897 | /* note: _req->short_not_ok is | |
898 | * ignored here since PIO _always_ | |
899 | * stops queue advance here, and | |
900 | * _req->status doesn't change for | |
901 | * short reads (only _req->actual) | |
902 | */ | |
903 | if (read_fifo (ep, req)) { | |
904 | done (ep, req, 0); | |
905 | if (ep->num == 0) | |
906 | allow_status (ep); | |
907 | /* don't queue it */ | |
908 | req = NULL; | |
909 | } else | |
910 | s = readl (&ep->regs->ep_stat); | |
911 | } | |
912 | ||
913 | /* don't NAK, let the fifo fill */ | |
914 | if (req && (s & (1 << NAK_OUT_PACKETS))) | |
915 | writel ((1 << CLEAR_NAK_OUT_PACKETS), | |
916 | &ep->regs->ep_rsp); | |
917 | } | |
918 | } | |
919 | ||
920 | } else if (ep->dma) { | |
921 | int valid = 1; | |
922 | ||
923 | if (ep->is_in) { | |
924 | int expect; | |
925 | ||
926 | /* preventing magic zlps is per-engine state, not | |
927 | * per-transfer; irq logic must recover hiccups. | |
928 | */ | |
929 | expect = likely (req->req.zero | |
930 | || (req->req.length % ep->ep.maxpacket) != 0); | |
931 | if (expect != ep->in_fifo_validate) | |
932 | valid = 0; | |
933 | } | |
934 | queue_dma (ep, req, valid); | |
935 | ||
936 | } /* else the irq handler advances the queue. */ | |
937 | ||
1f26e28d | 938 | ep->responded = 1; |
1da177e4 LT |
939 | if (req) |
940 | list_add_tail (&req->queue, &ep->queue); | |
941 | done: | |
942 | spin_unlock_irqrestore (&dev->lock, flags); | |
943 | ||
944 | /* pci writes may still be posted */ | |
945 | return 0; | |
946 | } | |
947 | ||
948 | static inline void | |
949 | dma_done ( | |
950 | struct net2280_ep *ep, | |
951 | struct net2280_request *req, | |
952 | u32 dmacount, | |
953 | int status | |
954 | ) | |
955 | { | |
956 | req->req.actual = req->req.length - (DMA_BYTE_COUNT_MASK & dmacount); | |
957 | done (ep, req, status); | |
958 | } | |
959 | ||
960 | static void restart_dma (struct net2280_ep *ep); | |
961 | ||
962 | static void scan_dma_completions (struct net2280_ep *ep) | |
963 | { | |
964 | /* only look at descriptors that were "naturally" retired, | |
965 | * so fifo and list head state won't matter | |
966 | */ | |
967 | while (!list_empty (&ep->queue)) { | |
968 | struct net2280_request *req; | |
969 | u32 tmp; | |
970 | ||
971 | req = list_entry (ep->queue.next, | |
972 | struct net2280_request, queue); | |
973 | if (!req->valid) | |
974 | break; | |
975 | rmb (); | |
976 | tmp = le32_to_cpup (&req->td->dmacount); | |
977 | if ((tmp & (1 << VALID_BIT)) != 0) | |
978 | break; | |
979 | ||
980 | /* SHORT_PACKET_TRANSFERRED_INTERRUPT handles "usb-short" | |
981 | * cases where DMA must be aborted; this code handles | |
982 | * all non-abort DMA completions. | |
983 | */ | |
984 | if (unlikely (req->td->dmadesc == 0)) { | |
985 | /* paranoia */ | |
986 | tmp = readl (&ep->dma->dmacount); | |
987 | if (tmp & DMA_BYTE_COUNT_MASK) | |
988 | break; | |
989 | /* single transfer mode */ | |
990 | dma_done (ep, req, tmp, 0); | |
991 | break; | |
992 | } else if (!ep->is_in | |
993 | && (req->req.length % ep->ep.maxpacket) != 0) { | |
994 | tmp = readl (&ep->regs->ep_stat); | |
995 | ||
996 | /* AVOID TROUBLE HERE by not issuing short reads from | |
997 | * your gadget driver. That helps avoids errata 0121, | |
998 | * 0122, and 0124; not all cases trigger the warning. | |
999 | */ | |
1000 | if ((tmp & (1 << NAK_OUT_PACKETS)) == 0) { | |
b6c63937 | 1001 | WARNING (ep->dev, "%s lost packet sync!\n", |
1da177e4 LT |
1002 | ep->ep.name); |
1003 | req->req.status = -EOVERFLOW; | |
1004 | } else if ((tmp = readl (&ep->regs->ep_avail)) != 0) { | |
1005 | /* fifo gets flushed later */ | |
1006 | ep->out_overflow = 1; | |
1007 | DEBUG (ep->dev, "%s dma, discard %d len %d\n", | |
1008 | ep->ep.name, tmp, | |
1009 | req->req.length); | |
1010 | req->req.status = -EOVERFLOW; | |
1011 | } | |
1012 | } | |
1013 | dma_done (ep, req, tmp, 0); | |
1014 | } | |
1015 | } | |
1016 | ||
1017 | static void restart_dma (struct net2280_ep *ep) | |
1018 | { | |
1019 | struct net2280_request *req; | |
1020 | u32 dmactl = dmactl_default; | |
1021 | ||
1022 | if (ep->stopped) | |
1023 | return; | |
1024 | req = list_entry (ep->queue.next, struct net2280_request, queue); | |
1025 | ||
1026 | if (!use_dma_chaining) { | |
1027 | start_dma (ep, req); | |
1028 | return; | |
1029 | } | |
1030 | ||
1031 | /* the 2280 will be processing the queue unless queue hiccups after | |
1032 | * the previous transfer: | |
1033 | * IN: wanted automagic zlp, head doesn't (or vice versa) | |
1034 | * DMA_FIFO_VALIDATE doesn't init from dma descriptors. | |
1035 | * OUT: was "usb-short", we must restart. | |
1036 | */ | |
1037 | if (ep->is_in && !req->valid) { | |
1038 | struct net2280_request *entry, *prev = NULL; | |
1039 | int reqmode, done = 0; | |
1040 | ||
1041 | DEBUG (ep->dev, "%s dma hiccup td %p\n", ep->ep.name, req->td); | |
1042 | ep->in_fifo_validate = likely (req->req.zero | |
1043 | || (req->req.length % ep->ep.maxpacket) != 0); | |
1044 | if (ep->in_fifo_validate) | |
1045 | dmactl |= (1 << DMA_FIFO_VALIDATE); | |
1046 | list_for_each_entry (entry, &ep->queue, queue) { | |
320f3459 | 1047 | __le32 dmacount; |
1da177e4 LT |
1048 | |
1049 | if (entry == req) | |
1050 | continue; | |
1051 | dmacount = entry->td->dmacount; | |
1052 | if (!done) { | |
1053 | reqmode = likely (entry->req.zero | |
1054 | || (entry->req.length | |
1055 | % ep->ep.maxpacket) != 0); | |
1056 | if (reqmode == ep->in_fifo_validate) { | |
1057 | entry->valid = 1; | |
1058 | dmacount |= valid_bit; | |
1059 | entry->td->dmacount = dmacount; | |
1060 | prev = entry; | |
1061 | continue; | |
1062 | } else { | |
1063 | /* force a hiccup */ | |
1064 | prev->td->dmacount |= dma_done_ie; | |
1065 | done = 1; | |
1066 | } | |
1067 | } | |
1068 | ||
1069 | /* walk the rest of the queue so unlinks behave */ | |
1070 | entry->valid = 0; | |
1071 | dmacount &= ~valid_bit; | |
1072 | entry->td->dmacount = dmacount; | |
1073 | prev = entry; | |
1074 | } | |
1075 | } | |
1076 | ||
1077 | writel (0, &ep->dma->dmactl); | |
1078 | start_queue (ep, dmactl, req->td_dma); | |
1079 | } | |
1080 | ||
1081 | static void abort_dma (struct net2280_ep *ep) | |
1082 | { | |
1083 | /* abort the current transfer */ | |
1084 | if (likely (!list_empty (&ep->queue))) { | |
1085 | /* FIXME work around errata 0121, 0122, 0124 */ | |
1086 | writel ((1 << DMA_ABORT), &ep->dma->dmastat); | |
1087 | spin_stop_dma (ep->dma); | |
1088 | } else | |
1089 | stop_dma (ep->dma); | |
1090 | scan_dma_completions (ep); | |
1091 | } | |
1092 | ||
1093 | /* dequeue ALL requests */ | |
1094 | static void nuke (struct net2280_ep *ep) | |
1095 | { | |
1096 | struct net2280_request *req; | |
1097 | ||
1098 | /* called with spinlock held */ | |
1099 | ep->stopped = 1; | |
1100 | if (ep->dma) | |
1101 | abort_dma (ep); | |
1102 | while (!list_empty (&ep->queue)) { | |
1103 | req = list_entry (ep->queue.next, | |
1104 | struct net2280_request, | |
1105 | queue); | |
1106 | done (ep, req, -ESHUTDOWN); | |
1107 | } | |
1108 | } | |
1109 | ||
1110 | /* dequeue JUST ONE request */ | |
1111 | static int net2280_dequeue (struct usb_ep *_ep, struct usb_request *_req) | |
1112 | { | |
1113 | struct net2280_ep *ep; | |
1114 | struct net2280_request *req; | |
1115 | unsigned long flags; | |
1116 | u32 dmactl; | |
1117 | int stopped; | |
1118 | ||
1119 | ep = container_of (_ep, struct net2280_ep, ep); | |
1120 | if (!_ep || (!ep->desc && ep->num != 0) || !_req) | |
1121 | return -EINVAL; | |
1122 | ||
1123 | spin_lock_irqsave (&ep->dev->lock, flags); | |
1124 | stopped = ep->stopped; | |
1125 | ||
1126 | /* quiesce dma while we patch the queue */ | |
1127 | dmactl = 0; | |
1128 | ep->stopped = 1; | |
1129 | if (ep->dma) { | |
1130 | dmactl = readl (&ep->dma->dmactl); | |
1131 | /* WARNING erratum 0127 may kick in ... */ | |
1132 | stop_dma (ep->dma); | |
1133 | scan_dma_completions (ep); | |
1134 | } | |
1135 | ||
1136 | /* make sure it's still queued on this endpoint */ | |
1137 | list_for_each_entry (req, &ep->queue, queue) { | |
1138 | if (&req->req == _req) | |
1139 | break; | |
1140 | } | |
1141 | if (&req->req != _req) { | |
1142 | spin_unlock_irqrestore (&ep->dev->lock, flags); | |
1143 | return -EINVAL; | |
1144 | } | |
1145 | ||
1146 | /* queue head may be partially complete. */ | |
1147 | if (ep->queue.next == &req->queue) { | |
1148 | if (ep->dma) { | |
1149 | DEBUG (ep->dev, "unlink (%s) dma\n", _ep->name); | |
1150 | _req->status = -ECONNRESET; | |
1151 | abort_dma (ep); | |
1152 | if (likely (ep->queue.next == &req->queue)) { | |
1153 | // NOTE: misreports single-transfer mode | |
1154 | req->td->dmacount = 0; /* invalidate */ | |
1155 | dma_done (ep, req, | |
1156 | readl (&ep->dma->dmacount), | |
1157 | -ECONNRESET); | |
1158 | } | |
1159 | } else { | |
1160 | DEBUG (ep->dev, "unlink (%s) pio\n", _ep->name); | |
1161 | done (ep, req, -ECONNRESET); | |
1162 | } | |
1163 | req = NULL; | |
1164 | ||
1165 | /* patch up hardware chaining data */ | |
1166 | } else if (ep->dma && use_dma_chaining) { | |
1167 | if (req->queue.prev == ep->queue.next) { | |
1168 | writel (le32_to_cpu (req->td->dmadesc), | |
1169 | &ep->dma->dmadesc); | |
1170 | if (req->td->dmacount & dma_done_ie) | |
1171 | writel (readl (&ep->dma->dmacount) | |
320f3459 | 1172 | | le32_to_cpu(dma_done_ie), |
1da177e4 LT |
1173 | &ep->dma->dmacount); |
1174 | } else { | |
1175 | struct net2280_request *prev; | |
1176 | ||
1177 | prev = list_entry (req->queue.prev, | |
1178 | struct net2280_request, queue); | |
1179 | prev->td->dmadesc = req->td->dmadesc; | |
1180 | if (req->td->dmacount & dma_done_ie) | |
1181 | prev->td->dmacount |= dma_done_ie; | |
1182 | } | |
1183 | } | |
1184 | ||
1185 | if (req) | |
1186 | done (ep, req, -ECONNRESET); | |
1187 | ep->stopped = stopped; | |
1188 | ||
1189 | if (ep->dma) { | |
1190 | /* turn off dma on inactive queues */ | |
1191 | if (list_empty (&ep->queue)) | |
1192 | stop_dma (ep->dma); | |
1193 | else if (!ep->stopped) { | |
1194 | /* resume current request, or start new one */ | |
1195 | if (req) | |
1196 | writel (dmactl, &ep->dma->dmactl); | |
1197 | else | |
1198 | start_dma (ep, list_entry (ep->queue.next, | |
1199 | struct net2280_request, queue)); | |
1200 | } | |
1201 | } | |
1202 | ||
1203 | spin_unlock_irqrestore (&ep->dev->lock, flags); | |
1204 | return 0; | |
1205 | } | |
1206 | ||
1207 | /*-------------------------------------------------------------------------*/ | |
1208 | ||
1209 | static int net2280_fifo_status (struct usb_ep *_ep); | |
1210 | ||
1211 | static int | |
8066134f | 1212 | net2280_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged) |
1da177e4 LT |
1213 | { |
1214 | struct net2280_ep *ep; | |
1215 | unsigned long flags; | |
1216 | int retval = 0; | |
1217 | ||
1218 | ep = container_of (_ep, struct net2280_ep, ep); | |
1219 | if (!_ep || (!ep->desc && ep->num != 0)) | |
1220 | return -EINVAL; | |
1221 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1222 | return -ESHUTDOWN; | |
1223 | if (ep->desc /* not ep0 */ && (ep->desc->bmAttributes & 0x03) | |
1224 | == USB_ENDPOINT_XFER_ISOC) | |
1225 | return -EINVAL; | |
1226 | ||
1227 | spin_lock_irqsave (&ep->dev->lock, flags); | |
1228 | if (!list_empty (&ep->queue)) | |
1229 | retval = -EAGAIN; | |
1230 | else if (ep->is_in && value && net2280_fifo_status (_ep) != 0) | |
1231 | retval = -EAGAIN; | |
1232 | else { | |
8066134f AS |
1233 | VDEBUG (ep->dev, "%s %s %s\n", _ep->name, |
1234 | value ? "set" : "clear", | |
1235 | wedged ? "wedge" : "halt"); | |
1da177e4 LT |
1236 | /* set/clear, then synch memory views with the device */ |
1237 | if (value) { | |
1238 | if (ep->num == 0) | |
1239 | ep->dev->protocol_stall = 1; | |
1240 | else | |
1241 | set_halt (ep); | |
8066134f AS |
1242 | if (wedged) |
1243 | ep->wedged = 1; | |
1244 | } else { | |
1da177e4 | 1245 | clear_halt (ep); |
8066134f AS |
1246 | ep->wedged = 0; |
1247 | } | |
1da177e4 LT |
1248 | (void) readl (&ep->regs->ep_rsp); |
1249 | } | |
1250 | spin_unlock_irqrestore (&ep->dev->lock, flags); | |
1251 | ||
1252 | return retval; | |
1253 | } | |
1254 | ||
8066134f AS |
1255 | static int |
1256 | net2280_set_halt(struct usb_ep *_ep, int value) | |
1257 | { | |
1258 | return net2280_set_halt_and_wedge(_ep, value, 0); | |
1259 | } | |
1260 | ||
1261 | static int | |
1262 | net2280_set_wedge(struct usb_ep *_ep) | |
1263 | { | |
1264 | if (!_ep || _ep->name == ep0name) | |
1265 | return -EINVAL; | |
1266 | return net2280_set_halt_and_wedge(_ep, 1, 1); | |
1267 | } | |
1268 | ||
1da177e4 LT |
1269 | static int |
1270 | net2280_fifo_status (struct usb_ep *_ep) | |
1271 | { | |
1272 | struct net2280_ep *ep; | |
1273 | u32 avail; | |
1274 | ||
1275 | ep = container_of (_ep, struct net2280_ep, ep); | |
1276 | if (!_ep || (!ep->desc && ep->num != 0)) | |
1277 | return -ENODEV; | |
1278 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1279 | return -ESHUTDOWN; | |
1280 | ||
1281 | avail = readl (&ep->regs->ep_avail) & ((1 << 12) - 1); | |
1282 | if (avail > ep->fifo_size) | |
1283 | return -EOVERFLOW; | |
1284 | if (ep->is_in) | |
1285 | avail = ep->fifo_size - avail; | |
1286 | return avail; | |
1287 | } | |
1288 | ||
1289 | static void | |
1290 | net2280_fifo_flush (struct usb_ep *_ep) | |
1291 | { | |
1292 | struct net2280_ep *ep; | |
1293 | ||
1294 | ep = container_of (_ep, struct net2280_ep, ep); | |
1295 | if (!_ep || (!ep->desc && ep->num != 0)) | |
1296 | return; | |
1297 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1298 | return; | |
1299 | ||
1300 | writel ((1 << FIFO_FLUSH), &ep->regs->ep_stat); | |
1301 | (void) readl (&ep->regs->ep_rsp); | |
1302 | } | |
1303 | ||
901b3d75 | 1304 | static const struct usb_ep_ops net2280_ep_ops = { |
1da177e4 LT |
1305 | .enable = net2280_enable, |
1306 | .disable = net2280_disable, | |
1307 | ||
1308 | .alloc_request = net2280_alloc_request, | |
1309 | .free_request = net2280_free_request, | |
1310 | ||
1da177e4 LT |
1311 | .queue = net2280_queue, |
1312 | .dequeue = net2280_dequeue, | |
1313 | ||
1314 | .set_halt = net2280_set_halt, | |
8066134f | 1315 | .set_wedge = net2280_set_wedge, |
1da177e4 LT |
1316 | .fifo_status = net2280_fifo_status, |
1317 | .fifo_flush = net2280_fifo_flush, | |
1318 | }; | |
1319 | ||
1320 | /*-------------------------------------------------------------------------*/ | |
1321 | ||
1322 | static int net2280_get_frame (struct usb_gadget *_gadget) | |
1323 | { | |
1324 | struct net2280 *dev; | |
1325 | unsigned long flags; | |
1326 | u16 retval; | |
1327 | ||
1328 | if (!_gadget) | |
1329 | return -ENODEV; | |
1330 | dev = container_of (_gadget, struct net2280, gadget); | |
1331 | spin_lock_irqsave (&dev->lock, flags); | |
1332 | retval = get_idx_reg (dev->regs, REG_FRAME) & 0x03ff; | |
1333 | spin_unlock_irqrestore (&dev->lock, flags); | |
1334 | return retval; | |
1335 | } | |
1336 | ||
1337 | static int net2280_wakeup (struct usb_gadget *_gadget) | |
1338 | { | |
1339 | struct net2280 *dev; | |
1340 | u32 tmp; | |
1341 | unsigned long flags; | |
1342 | ||
1343 | if (!_gadget) | |
1344 | return 0; | |
1345 | dev = container_of (_gadget, struct net2280, gadget); | |
1346 | ||
1347 | spin_lock_irqsave (&dev->lock, flags); | |
1348 | tmp = readl (&dev->usb->usbctl); | |
1349 | if (tmp & (1 << DEVICE_REMOTE_WAKEUP_ENABLE)) | |
1350 | writel (1 << GENERATE_RESUME, &dev->usb->usbstat); | |
1351 | spin_unlock_irqrestore (&dev->lock, flags); | |
1352 | ||
1353 | /* pci writes may still be posted */ | |
1354 | return 0; | |
1355 | } | |
1356 | ||
1357 | static int net2280_set_selfpowered (struct usb_gadget *_gadget, int value) | |
1358 | { | |
1359 | struct net2280 *dev; | |
1360 | u32 tmp; | |
1361 | unsigned long flags; | |
1362 | ||
1363 | if (!_gadget) | |
1364 | return 0; | |
1365 | dev = container_of (_gadget, struct net2280, gadget); | |
1366 | ||
1367 | spin_lock_irqsave (&dev->lock, flags); | |
1368 | tmp = readl (&dev->usb->usbctl); | |
1369 | if (value) | |
1370 | tmp |= (1 << SELF_POWERED_STATUS); | |
1371 | else | |
1372 | tmp &= ~(1 << SELF_POWERED_STATUS); | |
1373 | writel (tmp, &dev->usb->usbctl); | |
1374 | spin_unlock_irqrestore (&dev->lock, flags); | |
1375 | ||
1376 | return 0; | |
1377 | } | |
1378 | ||
1379 | static int net2280_pullup(struct usb_gadget *_gadget, int is_on) | |
1380 | { | |
1381 | struct net2280 *dev; | |
1382 | u32 tmp; | |
1383 | unsigned long flags; | |
1384 | ||
1385 | if (!_gadget) | |
1386 | return -ENODEV; | |
1387 | dev = container_of (_gadget, struct net2280, gadget); | |
1388 | ||
1389 | spin_lock_irqsave (&dev->lock, flags); | |
1390 | tmp = readl (&dev->usb->usbctl); | |
1391 | dev->softconnect = (is_on != 0); | |
1392 | if (is_on) | |
1393 | tmp |= (1 << USB_DETECT_ENABLE); | |
1394 | else | |
1395 | tmp &= ~(1 << USB_DETECT_ENABLE); | |
1396 | writel (tmp, &dev->usb->usbctl); | |
1397 | spin_unlock_irqrestore (&dev->lock, flags); | |
1398 | ||
1399 | return 0; | |
1400 | } | |
1401 | ||
4cf5e00b FB |
1402 | static int net2280_start(struct usb_gadget *_gadget, |
1403 | struct usb_gadget_driver *driver); | |
1404 | static int net2280_stop(struct usb_gadget *_gadget, | |
1405 | struct usb_gadget_driver *driver); | |
0f91349b | 1406 | |
1da177e4 LT |
1407 | static const struct usb_gadget_ops net2280_ops = { |
1408 | .get_frame = net2280_get_frame, | |
1409 | .wakeup = net2280_wakeup, | |
1410 | .set_selfpowered = net2280_set_selfpowered, | |
1411 | .pullup = net2280_pullup, | |
4cf5e00b FB |
1412 | .udc_start = net2280_start, |
1413 | .udc_stop = net2280_stop, | |
1da177e4 LT |
1414 | }; |
1415 | ||
1416 | /*-------------------------------------------------------------------------*/ | |
1417 | ||
1418 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
1419 | ||
1420 | /* FIXME move these into procfs, and use seq_file. | |
1421 | * Sysfs _still_ doesn't behave for arbitrarily sized files, | |
1422 | * and also doesn't help products using this with 2.4 kernels. | |
1423 | */ | |
1424 | ||
1425 | /* "function" sysfs attribute */ | |
1426 | static ssize_t | |
10523b3b | 1427 | show_function (struct device *_dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1428 | { |
1429 | struct net2280 *dev = dev_get_drvdata (_dev); | |
1430 | ||
1431 | if (!dev->driver | |
1432 | || !dev->driver->function | |
1433 | || strlen (dev->driver->function) > PAGE_SIZE) | |
1434 | return 0; | |
1435 | return scnprintf (buf, PAGE_SIZE, "%s\n", dev->driver->function); | |
1436 | } | |
1437 | static DEVICE_ATTR (function, S_IRUGO, show_function, NULL); | |
1438 | ||
62fb44b9 DH |
1439 | static ssize_t net2280_show_registers(struct device *_dev, |
1440 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
1441 | { |
1442 | struct net2280 *dev; | |
1443 | char *next; | |
1444 | unsigned size, t; | |
1445 | unsigned long flags; | |
1446 | int i; | |
1447 | u32 t1, t2; | |
30e69598 | 1448 | const char *s; |
1da177e4 LT |
1449 | |
1450 | dev = dev_get_drvdata (_dev); | |
1451 | next = buf; | |
1452 | size = PAGE_SIZE; | |
1453 | spin_lock_irqsave (&dev->lock, flags); | |
1454 | ||
1455 | if (dev->driver) | |
1456 | s = dev->driver->driver.name; | |
1457 | else | |
1458 | s = "(none)"; | |
1459 | ||
1460 | /* Main Control Registers */ | |
1461 | t = scnprintf (next, size, "%s version " DRIVER_VERSION | |
1462 | ", chiprev %04x, dma %s\n\n" | |
1463 | "devinit %03x fifoctl %08x gadget '%s'\n" | |
1464 | "pci irqenb0 %02x irqenb1 %08x " | |
1465 | "irqstat0 %04x irqstat1 %08x\n", | |
1466 | driver_name, dev->chiprev, | |
1467 | use_dma | |
1468 | ? (use_dma_chaining ? "chaining" : "enabled") | |
1469 | : "disabled", | |
1470 | readl (&dev->regs->devinit), | |
1471 | readl (&dev->regs->fifoctl), | |
1472 | s, | |
1473 | readl (&dev->regs->pciirqenb0), | |
1474 | readl (&dev->regs->pciirqenb1), | |
1475 | readl (&dev->regs->irqstat0), | |
1476 | readl (&dev->regs->irqstat1)); | |
1477 | size -= t; | |
1478 | next += t; | |
1479 | ||
1480 | /* USB Control Registers */ | |
1481 | t1 = readl (&dev->usb->usbctl); | |
1482 | t2 = readl (&dev->usb->usbstat); | |
1483 | if (t1 & (1 << VBUS_PIN)) { | |
1484 | if (t2 & (1 << HIGH_SPEED)) | |
1485 | s = "high speed"; | |
1486 | else if (dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1487 | s = "powered"; | |
1488 | else | |
1489 | s = "full speed"; | |
1490 | /* full speed bit (6) not working?? */ | |
1491 | } else | |
1492 | s = "not attached"; | |
1493 | t = scnprintf (next, size, | |
1494 | "stdrsp %08x usbctl %08x usbstat %08x " | |
1495 | "addr 0x%02x (%s)\n", | |
1496 | readl (&dev->usb->stdrsp), t1, t2, | |
1497 | readl (&dev->usb->ouraddr), s); | |
1498 | size -= t; | |
1499 | next += t; | |
1500 | ||
1501 | /* PCI Master Control Registers */ | |
1502 | ||
1503 | /* DMA Control Registers */ | |
1504 | ||
1505 | /* Configurable EP Control Registers */ | |
1506 | for (i = 0; i < 7; i++) { | |
1507 | struct net2280_ep *ep; | |
1508 | ||
1509 | ep = &dev->ep [i]; | |
1510 | if (i && !ep->desc) | |
1511 | continue; | |
1512 | ||
1513 | t1 = readl (&ep->regs->ep_cfg); | |
1514 | t2 = readl (&ep->regs->ep_rsp) & 0xff; | |
1515 | t = scnprintf (next, size, | |
1516 | "\n%s\tcfg %05x rsp (%02x) %s%s%s%s%s%s%s%s" | |
1517 | "irqenb %02x\n", | |
1518 | ep->ep.name, t1, t2, | |
1519 | (t2 & (1 << CLEAR_NAK_OUT_PACKETS)) | |
1520 | ? "NAK " : "", | |
1521 | (t2 & (1 << CLEAR_EP_HIDE_STATUS_PHASE)) | |
1522 | ? "hide " : "", | |
1523 | (t2 & (1 << CLEAR_EP_FORCE_CRC_ERROR)) | |
1524 | ? "CRC " : "", | |
1525 | (t2 & (1 << CLEAR_INTERRUPT_MODE)) | |
1526 | ? "interrupt " : "", | |
1527 | (t2 & (1<<CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE)) | |
1528 | ? "status " : "", | |
1529 | (t2 & (1 << CLEAR_NAK_OUT_PACKETS_MODE)) | |
1530 | ? "NAKmode " : "", | |
1531 | (t2 & (1 << CLEAR_ENDPOINT_TOGGLE)) | |
1532 | ? "DATA1 " : "DATA0 ", | |
1533 | (t2 & (1 << CLEAR_ENDPOINT_HALT)) | |
1534 | ? "HALT " : "", | |
1535 | readl (&ep->regs->ep_irqenb)); | |
1536 | size -= t; | |
1537 | next += t; | |
1538 | ||
1539 | t = scnprintf (next, size, | |
1540 | "\tstat %08x avail %04x " | |
1541 | "(ep%d%s-%s)%s\n", | |
1542 | readl (&ep->regs->ep_stat), | |
1543 | readl (&ep->regs->ep_avail), | |
1544 | t1 & 0x0f, DIR_STRING (t1), | |
1545 | type_string (t1 >> 8), | |
1546 | ep->stopped ? "*" : ""); | |
1547 | size -= t; | |
1548 | next += t; | |
1549 | ||
1550 | if (!ep->dma) | |
1551 | continue; | |
1552 | ||
1553 | t = scnprintf (next, size, | |
1554 | " dma\tctl %08x stat %08x count %08x\n" | |
1555 | "\taddr %08x desc %08x\n", | |
1556 | readl (&ep->dma->dmactl), | |
1557 | readl (&ep->dma->dmastat), | |
1558 | readl (&ep->dma->dmacount), | |
1559 | readl (&ep->dma->dmaaddr), | |
1560 | readl (&ep->dma->dmadesc)); | |
1561 | size -= t; | |
1562 | next += t; | |
1563 | ||
1564 | } | |
1565 | ||
1566 | /* Indexed Registers */ | |
901b3d75 | 1567 | // none yet |
1da177e4 LT |
1568 | |
1569 | /* Statistics */ | |
1570 | t = scnprintf (next, size, "\nirqs: "); | |
1571 | size -= t; | |
1572 | next += t; | |
1573 | for (i = 0; i < 7; i++) { | |
1574 | struct net2280_ep *ep; | |
1575 | ||
1576 | ep = &dev->ep [i]; | |
1577 | if (i && !ep->irqs) | |
1578 | continue; | |
1579 | t = scnprintf (next, size, " %s/%lu", ep->ep.name, ep->irqs); | |
1580 | size -= t; | |
1581 | next += t; | |
1582 | ||
1583 | } | |
1584 | t = scnprintf (next, size, "\n"); | |
1585 | size -= t; | |
1586 | next += t; | |
1587 | ||
1588 | spin_unlock_irqrestore (&dev->lock, flags); | |
1589 | ||
1590 | return PAGE_SIZE - size; | |
1591 | } | |
62fb44b9 | 1592 | static DEVICE_ATTR(registers, S_IRUGO, net2280_show_registers, NULL); |
1da177e4 LT |
1593 | |
1594 | static ssize_t | |
10523b3b | 1595 | show_queues (struct device *_dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1596 | { |
1597 | struct net2280 *dev; | |
1598 | char *next; | |
1599 | unsigned size; | |
1600 | unsigned long flags; | |
1601 | int i; | |
1602 | ||
1603 | dev = dev_get_drvdata (_dev); | |
1604 | next = buf; | |
1605 | size = PAGE_SIZE; | |
1606 | spin_lock_irqsave (&dev->lock, flags); | |
1607 | ||
1608 | for (i = 0; i < 7; i++) { | |
1609 | struct net2280_ep *ep = &dev->ep [i]; | |
1610 | struct net2280_request *req; | |
1611 | int t; | |
1612 | ||
1613 | if (i != 0) { | |
1614 | const struct usb_endpoint_descriptor *d; | |
1615 | ||
1616 | d = ep->desc; | |
1617 | if (!d) | |
1618 | continue; | |
1619 | t = d->bEndpointAddress; | |
1620 | t = scnprintf (next, size, | |
1621 | "\n%s (ep%d%s-%s) max %04x %s fifo %d\n", | |
1622 | ep->ep.name, t & USB_ENDPOINT_NUMBER_MASK, | |
1623 | (t & USB_DIR_IN) ? "in" : "out", | |
1624 | ({ char *val; | |
1625 | switch (d->bmAttributes & 0x03) { | |
1626 | case USB_ENDPOINT_XFER_BULK: | |
901b3d75 | 1627 | val = "bulk"; break; |
1da177e4 | 1628 | case USB_ENDPOINT_XFER_INT: |
901b3d75 | 1629 | val = "intr"; break; |
1da177e4 | 1630 | default: |
901b3d75 | 1631 | val = "iso"; break; |
1da177e4 | 1632 | }; val; }), |
29cc8897 | 1633 | usb_endpoint_maxp (d) & 0x1fff, |
1da177e4 LT |
1634 | ep->dma ? "dma" : "pio", ep->fifo_size |
1635 | ); | |
1636 | } else /* ep0 should only have one transfer queued */ | |
1637 | t = scnprintf (next, size, "ep0 max 64 pio %s\n", | |
1638 | ep->is_in ? "in" : "out"); | |
1639 | if (t <= 0 || t > size) | |
1640 | goto done; | |
1641 | size -= t; | |
1642 | next += t; | |
1643 | ||
1644 | if (list_empty (&ep->queue)) { | |
1645 | t = scnprintf (next, size, "\t(nothing queued)\n"); | |
1646 | if (t <= 0 || t > size) | |
1647 | goto done; | |
1648 | size -= t; | |
1649 | next += t; | |
1650 | continue; | |
1651 | } | |
1652 | list_for_each_entry (req, &ep->queue, queue) { | |
1653 | if (ep->dma && req->td_dma == readl (&ep->dma->dmadesc)) | |
1654 | t = scnprintf (next, size, | |
1655 | "\treq %p len %d/%d " | |
1656 | "buf %p (dmacount %08x)\n", | |
1657 | &req->req, req->req.actual, | |
1658 | req->req.length, req->req.buf, | |
1659 | readl (&ep->dma->dmacount)); | |
1660 | else | |
1661 | t = scnprintf (next, size, | |
1662 | "\treq %p len %d/%d buf %p\n", | |
1663 | &req->req, req->req.actual, | |
1664 | req->req.length, req->req.buf); | |
1665 | if (t <= 0 || t > size) | |
1666 | goto done; | |
1667 | size -= t; | |
1668 | next += t; | |
1669 | ||
1670 | if (ep->dma) { | |
1671 | struct net2280_dma *td; | |
1672 | ||
1673 | td = req->td; | |
1674 | t = scnprintf (next, size, "\t td %08x " | |
1675 | " count %08x buf %08x desc %08x\n", | |
1676 | (u32) req->td_dma, | |
1677 | le32_to_cpu (td->dmacount), | |
1678 | le32_to_cpu (td->dmaaddr), | |
1679 | le32_to_cpu (td->dmadesc)); | |
1680 | if (t <= 0 || t > size) | |
1681 | goto done; | |
1682 | size -= t; | |
1683 | next += t; | |
1684 | } | |
1685 | } | |
1686 | } | |
1687 | ||
1688 | done: | |
1689 | spin_unlock_irqrestore (&dev->lock, flags); | |
1690 | return PAGE_SIZE - size; | |
1691 | } | |
1692 | static DEVICE_ATTR (queues, S_IRUGO, show_queues, NULL); | |
1693 | ||
1694 | ||
1695 | #else | |
1696 | ||
9950421c LT |
1697 | #define device_create_file(a,b) (0) |
1698 | #define device_remove_file(a,b) do { } while (0) | |
1da177e4 LT |
1699 | |
1700 | #endif | |
1701 | ||
1702 | /*-------------------------------------------------------------------------*/ | |
1703 | ||
1704 | /* another driver-specific mode might be a request type doing dma | |
1705 | * to/from another device fifo instead of to/from memory. | |
1706 | */ | |
1707 | ||
1708 | static void set_fifo_mode (struct net2280 *dev, int mode) | |
1709 | { | |
1710 | /* keeping high bits preserves BAR2 */ | |
1711 | writel ((0xffff << PCI_BASE2_RANGE) | mode, &dev->regs->fifoctl); | |
1712 | ||
1713 | /* always ep-{a,b,e,f} ... maybe not ep-c or ep-d */ | |
1714 | INIT_LIST_HEAD (&dev->gadget.ep_list); | |
1715 | list_add_tail (&dev->ep [1].ep.ep_list, &dev->gadget.ep_list); | |
1716 | list_add_tail (&dev->ep [2].ep.ep_list, &dev->gadget.ep_list); | |
1717 | switch (mode) { | |
1718 | case 0: | |
1719 | list_add_tail (&dev->ep [3].ep.ep_list, &dev->gadget.ep_list); | |
1720 | list_add_tail (&dev->ep [4].ep.ep_list, &dev->gadget.ep_list); | |
1721 | dev->ep [1].fifo_size = dev->ep [2].fifo_size = 1024; | |
1722 | break; | |
1723 | case 1: | |
1724 | dev->ep [1].fifo_size = dev->ep [2].fifo_size = 2048; | |
1725 | break; | |
1726 | case 2: | |
1727 | list_add_tail (&dev->ep [3].ep.ep_list, &dev->gadget.ep_list); | |
1728 | dev->ep [1].fifo_size = 2048; | |
1729 | dev->ep [2].fifo_size = 1024; | |
1730 | break; | |
1731 | } | |
1732 | /* fifo sizes for ep0, ep-c, ep-d, ep-e, and ep-f never change */ | |
1733 | list_add_tail (&dev->ep [5].ep.ep_list, &dev->gadget.ep_list); | |
1734 | list_add_tail (&dev->ep [6].ep.ep_list, &dev->gadget.ep_list); | |
1735 | } | |
1736 | ||
1da177e4 LT |
1737 | /* keeping it simple: |
1738 | * - one bus driver, initted first; | |
1739 | * - one function driver, initted second | |
1740 | * | |
1741 | * most of the work to support multiple net2280 controllers would | |
1742 | * be to associate this gadget driver (yes?) with all of them, or | |
1743 | * perhaps to bind specific drivers to specific devices. | |
1744 | */ | |
1745 | ||
1da177e4 LT |
1746 | static void usb_reset (struct net2280 *dev) |
1747 | { | |
1748 | u32 tmp; | |
1749 | ||
1750 | dev->gadget.speed = USB_SPEED_UNKNOWN; | |
1751 | (void) readl (&dev->usb->usbctl); | |
1752 | ||
1753 | net2280_led_init (dev); | |
1754 | ||
1755 | /* disable automatic responses, and irqs */ | |
1756 | writel (0, &dev->usb->stdrsp); | |
1757 | writel (0, &dev->regs->pciirqenb0); | |
1758 | writel (0, &dev->regs->pciirqenb1); | |
1759 | ||
1760 | /* clear old dma and irq state */ | |
1761 | for (tmp = 0; tmp < 4; tmp++) { | |
1762 | struct net2280_ep *ep = &dev->ep [tmp + 1]; | |
1763 | ||
1764 | if (ep->dma) | |
1765 | abort_dma (ep); | |
1766 | } | |
1767 | writel (~0, &dev->regs->irqstat0), | |
1768 | writel (~(1 << SUSPEND_REQUEST_INTERRUPT), &dev->regs->irqstat1), | |
1769 | ||
1770 | /* reset, and enable pci */ | |
1771 | tmp = readl (&dev->regs->devinit) | |
1772 | | (1 << PCI_ENABLE) | |
1773 | | (1 << FIFO_SOFT_RESET) | |
1774 | | (1 << USB_SOFT_RESET) | |
1775 | | (1 << M8051_RESET); | |
1776 | writel (tmp, &dev->regs->devinit); | |
1777 | ||
1778 | /* standard fifo and endpoint allocations */ | |
1779 | set_fifo_mode (dev, (fifo_mode <= 2) ? fifo_mode : 0); | |
1780 | } | |
1781 | ||
1782 | static void usb_reinit (struct net2280 *dev) | |
1783 | { | |
1784 | u32 tmp; | |
1785 | int init_dma; | |
1786 | ||
1787 | /* use_dma changes are ignored till next device re-init */ | |
1788 | init_dma = use_dma; | |
1789 | ||
1790 | /* basic endpoint init */ | |
1791 | for (tmp = 0; tmp < 7; tmp++) { | |
1792 | struct net2280_ep *ep = &dev->ep [tmp]; | |
1793 | ||
1794 | ep->ep.name = ep_name [tmp]; | |
1795 | ep->dev = dev; | |
1796 | ep->num = tmp; | |
1797 | ||
1798 | if (tmp > 0 && tmp <= 4) { | |
1799 | ep->fifo_size = 1024; | |
1800 | if (init_dma) | |
1801 | ep->dma = &dev->dma [tmp - 1]; | |
1802 | } else | |
1803 | ep->fifo_size = 64; | |
1804 | ep->regs = &dev->epregs [tmp]; | |
1805 | ep_reset (dev->regs, ep); | |
1806 | } | |
1807 | dev->ep [0].ep.maxpacket = 64; | |
1808 | dev->ep [5].ep.maxpacket = 64; | |
1809 | dev->ep [6].ep.maxpacket = 64; | |
1810 | ||
1811 | dev->gadget.ep0 = &dev->ep [0].ep; | |
1812 | dev->ep [0].stopped = 0; | |
1813 | INIT_LIST_HEAD (&dev->gadget.ep0->ep_list); | |
1814 | ||
1815 | /* we want to prevent lowlevel/insecure access from the USB host, | |
1816 | * but erratum 0119 means this enable bit is ignored | |
1817 | */ | |
1818 | for (tmp = 0; tmp < 5; tmp++) | |
1819 | writel (EP_DONTUSE, &dev->dep [tmp].dep_cfg); | |
1820 | } | |
1821 | ||
1822 | static void ep0_start (struct net2280 *dev) | |
1823 | { | |
1824 | writel ( (1 << CLEAR_EP_HIDE_STATUS_PHASE) | |
1825 | | (1 << CLEAR_NAK_OUT_PACKETS) | |
1826 | | (1 << CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE) | |
1827 | , &dev->epregs [0].ep_rsp); | |
1828 | ||
1829 | /* | |
1830 | * hardware optionally handles a bunch of standard requests | |
1831 | * that the API hides from drivers anyway. have it do so. | |
1832 | * endpoint status/features are handled in software, to | |
1833 | * help pass tests for some dubious behavior. | |
1834 | */ | |
1835 | writel ( (1 << SET_TEST_MODE) | |
1836 | | (1 << SET_ADDRESS) | |
1837 | | (1 << DEVICE_SET_CLEAR_DEVICE_REMOTE_WAKEUP) | |
1838 | | (1 << GET_DEVICE_STATUS) | |
1839 | | (1 << GET_INTERFACE_STATUS) | |
1840 | , &dev->usb->stdrsp); | |
1841 | writel ( (1 << USB_ROOT_PORT_WAKEUP_ENABLE) | |
1842 | | (1 << SELF_POWERED_USB_DEVICE) | |
1843 | | (1 << REMOTE_WAKEUP_SUPPORT) | |
1844 | | (dev->softconnect << USB_DETECT_ENABLE) | |
1845 | | (1 << SELF_POWERED_STATUS) | |
1846 | , &dev->usb->usbctl); | |
1847 | ||
1848 | /* enable irqs so we can see ep0 and general operation */ | |
1849 | writel ( (1 << SETUP_PACKET_INTERRUPT_ENABLE) | |
1850 | | (1 << ENDPOINT_0_INTERRUPT_ENABLE) | |
1851 | , &dev->regs->pciirqenb0); | |
1852 | writel ( (1 << PCI_INTERRUPT_ENABLE) | |
1853 | | (1 << PCI_MASTER_ABORT_RECEIVED_INTERRUPT_ENABLE) | |
1854 | | (1 << PCI_TARGET_ABORT_RECEIVED_INTERRUPT_ENABLE) | |
1855 | | (1 << PCI_RETRY_ABORT_INTERRUPT_ENABLE) | |
1856 | | (1 << VBUS_INTERRUPT_ENABLE) | |
1857 | | (1 << ROOT_PORT_RESET_INTERRUPT_ENABLE) | |
1858 | | (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE) | |
1859 | , &dev->regs->pciirqenb1); | |
1860 | ||
1861 | /* don't leave any writes posted */ | |
1862 | (void) readl (&dev->usb->usbctl); | |
1863 | } | |
1864 | ||
1865 | /* when a driver is successfully registered, it will receive | |
1866 | * control requests including set_configuration(), which enables | |
1867 | * non-control requests. then usb traffic follows until a | |
1868 | * disconnect is reported. then a host may connect again, or | |
1869 | * the driver might get unbound. | |
1870 | */ | |
4cf5e00b FB |
1871 | static int net2280_start(struct usb_gadget *_gadget, |
1872 | struct usb_gadget_driver *driver) | |
1da177e4 | 1873 | { |
4cf5e00b | 1874 | struct net2280 *dev; |
1da177e4 LT |
1875 | int retval; |
1876 | unsigned i; | |
1877 | ||
1878 | /* insist on high speed support from the driver, since | |
1879 | * (dev->usb->xcvrdiag & FORCE_FULL_SPEED_MODE) | |
1880 | * "must not be used in normal operation" | |
1881 | */ | |
7177aed4 | 1882 | if (!driver || driver->max_speed < USB_SPEED_HIGH |
4cf5e00b | 1883 | || !driver->setup) |
1da177e4 | 1884 | return -EINVAL; |
4cf5e00b FB |
1885 | |
1886 | dev = container_of (_gadget, struct net2280, gadget); | |
1da177e4 LT |
1887 | |
1888 | for (i = 0; i < 7; i++) | |
1889 | dev->ep [i].irqs = 0; | |
1890 | ||
1891 | /* hook up the driver ... */ | |
1892 | dev->softconnect = 1; | |
1893 | driver->driver.bus = NULL; | |
1894 | dev->driver = driver; | |
1895 | dev->gadget.dev.driver = &driver->driver; | |
1da177e4 | 1896 | |
b3899dac JG |
1897 | retval = device_create_file (&dev->pdev->dev, &dev_attr_function); |
1898 | if (retval) goto err_unbind; | |
1899 | retval = device_create_file (&dev->pdev->dev, &dev_attr_queues); | |
1900 | if (retval) goto err_func; | |
1da177e4 LT |
1901 | |
1902 | /* ... then enable host detection and ep0; and we're ready | |
1903 | * for set_configuration as well as eventual disconnect. | |
1904 | */ | |
1905 | net2280_led_active (dev, 1); | |
1906 | ep0_start (dev); | |
1907 | ||
1908 | DEBUG (dev, "%s ready, usbctl %08x stdrsp %08x\n", | |
1909 | driver->driver.name, | |
1910 | readl (&dev->usb->usbctl), | |
1911 | readl (&dev->usb->stdrsp)); | |
1912 | ||
1913 | /* pci writes may still be posted */ | |
1914 | return 0; | |
b3899dac JG |
1915 | |
1916 | err_func: | |
1917 | device_remove_file (&dev->pdev->dev, &dev_attr_function); | |
1918 | err_unbind: | |
1919 | driver->unbind (&dev->gadget); | |
1920 | dev->gadget.dev.driver = NULL; | |
1921 | dev->driver = NULL; | |
1922 | return retval; | |
1da177e4 | 1923 | } |
1da177e4 LT |
1924 | |
1925 | static void | |
1926 | stop_activity (struct net2280 *dev, struct usb_gadget_driver *driver) | |
1927 | { | |
1928 | int i; | |
1929 | ||
1930 | /* don't disconnect if it's not connected */ | |
1931 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1932 | driver = NULL; | |
1933 | ||
1934 | /* stop hardware; prevent new request submissions; | |
1935 | * and kill any outstanding requests. | |
1936 | */ | |
1937 | usb_reset (dev); | |
1938 | for (i = 0; i < 7; i++) | |
1939 | nuke (&dev->ep [i]); | |
1940 | ||
1da177e4 LT |
1941 | usb_reinit (dev); |
1942 | } | |
1943 | ||
4cf5e00b FB |
1944 | static int net2280_stop(struct usb_gadget *_gadget, |
1945 | struct usb_gadget_driver *driver) | |
1da177e4 | 1946 | { |
4cf5e00b | 1947 | struct net2280 *dev; |
1da177e4 LT |
1948 | unsigned long flags; |
1949 | ||
4cf5e00b | 1950 | dev = container_of (_gadget, struct net2280, gadget); |
1da177e4 LT |
1951 | |
1952 | spin_lock_irqsave (&dev->lock, flags); | |
1953 | stop_activity (dev, driver); | |
1954 | spin_unlock_irqrestore (&dev->lock, flags); | |
1955 | ||
1da177e4 LT |
1956 | dev->gadget.dev.driver = NULL; |
1957 | dev->driver = NULL; | |
1958 | ||
1959 | net2280_led_active (dev, 0); | |
1960 | device_remove_file (&dev->pdev->dev, &dev_attr_function); | |
1961 | device_remove_file (&dev->pdev->dev, &dev_attr_queues); | |
1962 | ||
1963 | DEBUG (dev, "unregistered driver '%s'\n", driver->driver.name); | |
1964 | return 0; | |
1965 | } | |
1da177e4 LT |
1966 | |
1967 | /*-------------------------------------------------------------------------*/ | |
1968 | ||
1969 | /* handle ep0, ep-e, ep-f with 64 byte packets: packet per irq. | |
1970 | * also works for dma-capable endpoints, in pio mode or just | |
1971 | * to manually advance the queue after short OUT transfers. | |
1972 | */ | |
1973 | static void handle_ep_small (struct net2280_ep *ep) | |
1974 | { | |
1975 | struct net2280_request *req; | |
1976 | u32 t; | |
1977 | /* 0 error, 1 mid-data, 2 done */ | |
1978 | int mode = 1; | |
1979 | ||
1980 | if (!list_empty (&ep->queue)) | |
1981 | req = list_entry (ep->queue.next, | |
1982 | struct net2280_request, queue); | |
1983 | else | |
1984 | req = NULL; | |
1985 | ||
1986 | /* ack all, and handle what we care about */ | |
1987 | t = readl (&ep->regs->ep_stat); | |
1988 | ep->irqs++; | |
1989 | #if 0 | |
1990 | VDEBUG (ep->dev, "%s ack ep_stat %08x, req %p\n", | |
1991 | ep->ep.name, t, req ? &req->req : 0); | |
1992 | #endif | |
950ee4c8 GL |
1993 | if (!ep->is_in || ep->dev->pdev->device == 0x2280) |
1994 | writel (t & ~(1 << NAK_OUT_PACKETS), &ep->regs->ep_stat); | |
1995 | else | |
1996 | /* Added for 2282 */ | |
1997 | writel (t, &ep->regs->ep_stat); | |
1da177e4 LT |
1998 | |
1999 | /* for ep0, monitor token irqs to catch data stage length errors | |
2000 | * and to synchronize on status. | |
2001 | * | |
2002 | * also, to defer reporting of protocol stalls ... here's where | |
2003 | * data or status first appears, handling stalls here should never | |
2004 | * cause trouble on the host side.. | |
2005 | * | |
2006 | * control requests could be slightly faster without token synch for | |
2007 | * status, but status can jam up that way. | |
2008 | */ | |
2009 | if (unlikely (ep->num == 0)) { | |
2010 | if (ep->is_in) { | |
2011 | /* status; stop NAKing */ | |
2012 | if (t & (1 << DATA_OUT_PING_TOKEN_INTERRUPT)) { | |
2013 | if (ep->dev->protocol_stall) { | |
2014 | ep->stopped = 1; | |
2015 | set_halt (ep); | |
2016 | } | |
2017 | if (!req) | |
2018 | allow_status (ep); | |
2019 | mode = 2; | |
2020 | /* reply to extra IN data tokens with a zlp */ | |
2021 | } else if (t & (1 << DATA_IN_TOKEN_INTERRUPT)) { | |
2022 | if (ep->dev->protocol_stall) { | |
2023 | ep->stopped = 1; | |
2024 | set_halt (ep); | |
2025 | mode = 2; | |
1f26e28d AS |
2026 | } else if (ep->responded && |
2027 | !req && !ep->stopped) | |
1da177e4 LT |
2028 | write_fifo (ep, NULL); |
2029 | } | |
2030 | } else { | |
2031 | /* status; stop NAKing */ | |
2032 | if (t & (1 << DATA_IN_TOKEN_INTERRUPT)) { | |
2033 | if (ep->dev->protocol_stall) { | |
2034 | ep->stopped = 1; | |
2035 | set_halt (ep); | |
2036 | } | |
2037 | mode = 2; | |
2038 | /* an extra OUT token is an error */ | |
2039 | } else if (((t & (1 << DATA_OUT_PING_TOKEN_INTERRUPT)) | |
2040 | && req | |
2041 | && req->req.actual == req->req.length) | |
1f26e28d | 2042 | || (ep->responded && !req)) { |
1da177e4 LT |
2043 | ep->dev->protocol_stall = 1; |
2044 | set_halt (ep); | |
2045 | ep->stopped = 1; | |
2046 | if (req) | |
2047 | done (ep, req, -EOVERFLOW); | |
2048 | req = NULL; | |
2049 | } | |
2050 | } | |
2051 | } | |
2052 | ||
2053 | if (unlikely (!req)) | |
2054 | return; | |
2055 | ||
2056 | /* manual DMA queue advance after short OUT */ | |
2057 | if (likely (ep->dma != 0)) { | |
2058 | if (t & (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)) { | |
2059 | u32 count; | |
2060 | int stopped = ep->stopped; | |
2061 | ||
2062 | /* TRANSFERRED works around OUT_DONE erratum 0112. | |
2063 | * we expect (N <= maxpacket) bytes; host wrote M. | |
2064 | * iff (M < N) we won't ever see a DMA interrupt. | |
2065 | */ | |
2066 | ep->stopped = 1; | |
2067 | for (count = 0; ; t = readl (&ep->regs->ep_stat)) { | |
2068 | ||
2069 | /* any preceding dma transfers must finish. | |
2070 | * dma handles (M >= N), may empty the queue | |
2071 | */ | |
2072 | scan_dma_completions (ep); | |
2073 | if (unlikely (list_empty (&ep->queue) | |
2074 | || ep->out_overflow)) { | |
2075 | req = NULL; | |
2076 | break; | |
2077 | } | |
2078 | req = list_entry (ep->queue.next, | |
2079 | struct net2280_request, queue); | |
2080 | ||
2081 | /* here either (M < N), a "real" short rx; | |
2082 | * or (M == N) and the queue didn't empty | |
2083 | */ | |
2084 | if (likely (t & (1 << FIFO_EMPTY))) { | |
2085 | count = readl (&ep->dma->dmacount); | |
2086 | count &= DMA_BYTE_COUNT_MASK; | |
2087 | if (readl (&ep->dma->dmadesc) | |
2088 | != req->td_dma) | |
2089 | req = NULL; | |
2090 | break; | |
2091 | } | |
2092 | udelay(1); | |
2093 | } | |
2094 | ||
2095 | /* stop DMA, leave ep NAKing */ | |
2096 | writel ((1 << DMA_ABORT), &ep->dma->dmastat); | |
2097 | spin_stop_dma (ep->dma); | |
2098 | ||
2099 | if (likely (req)) { | |
2100 | req->td->dmacount = 0; | |
2101 | t = readl (&ep->regs->ep_avail); | |
68dcc688 | 2102 | dma_done (ep, req, count, |
901b3d75 DB |
2103 | (ep->out_overflow || t) |
2104 | ? -EOVERFLOW : 0); | |
1da177e4 LT |
2105 | } |
2106 | ||
2107 | /* also flush to prevent erratum 0106 trouble */ | |
2108 | if (unlikely (ep->out_overflow | |
2109 | || (ep->dev->chiprev == 0x0100 | |
2110 | && ep->dev->gadget.speed | |
2111 | == USB_SPEED_FULL))) { | |
2112 | out_flush (ep); | |
2113 | ep->out_overflow = 0; | |
2114 | } | |
2115 | ||
2116 | /* (re)start dma if needed, stop NAKing */ | |
2117 | ep->stopped = stopped; | |
2118 | if (!list_empty (&ep->queue)) | |
2119 | restart_dma (ep); | |
2120 | } else | |
2121 | DEBUG (ep->dev, "%s dma ep_stat %08x ??\n", | |
2122 | ep->ep.name, t); | |
2123 | return; | |
2124 | ||
2125 | /* data packet(s) received (in the fifo, OUT) */ | |
2126 | } else if (t & (1 << DATA_PACKET_RECEIVED_INTERRUPT)) { | |
2127 | if (read_fifo (ep, req) && ep->num != 0) | |
2128 | mode = 2; | |
2129 | ||
2130 | /* data packet(s) transmitted (IN) */ | |
2131 | } else if (t & (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)) { | |
2132 | unsigned len; | |
2133 | ||
2134 | len = req->req.length - req->req.actual; | |
2135 | if (len > ep->ep.maxpacket) | |
2136 | len = ep->ep.maxpacket; | |
2137 | req->req.actual += len; | |
2138 | ||
2139 | /* if we wrote it all, we're usually done */ | |
2140 | if (req->req.actual == req->req.length) { | |
2141 | if (ep->num == 0) { | |
317e83b8 | 2142 | /* send zlps until the status stage */ |
1da177e4 LT |
2143 | } else if (!req->req.zero || len != ep->ep.maxpacket) |
2144 | mode = 2; | |
2145 | } | |
2146 | ||
2147 | /* there was nothing to do ... */ | |
2148 | } else if (mode == 1) | |
2149 | return; | |
2150 | ||
2151 | /* done */ | |
2152 | if (mode == 2) { | |
2153 | /* stream endpoints often resubmit/unlink in completion */ | |
2154 | done (ep, req, 0); | |
2155 | ||
2156 | /* maybe advance queue to next request */ | |
2157 | if (ep->num == 0) { | |
2158 | /* NOTE: net2280 could let gadget driver start the | |
2159 | * status stage later. since not all controllers let | |
2160 | * them control that, the api doesn't (yet) allow it. | |
2161 | */ | |
2162 | if (!ep->stopped) | |
2163 | allow_status (ep); | |
2164 | req = NULL; | |
2165 | } else { | |
2166 | if (!list_empty (&ep->queue) && !ep->stopped) | |
2167 | req = list_entry (ep->queue.next, | |
2168 | struct net2280_request, queue); | |
2169 | else | |
2170 | req = NULL; | |
2171 | if (req && !ep->is_in) | |
2172 | stop_out_naking (ep); | |
2173 | } | |
2174 | } | |
2175 | ||
2176 | /* is there a buffer for the next packet? | |
2177 | * for best streaming performance, make sure there is one. | |
2178 | */ | |
2179 | if (req && !ep->stopped) { | |
2180 | ||
2181 | /* load IN fifo with next packet (may be zlp) */ | |
2182 | if (t & (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)) | |
2183 | write_fifo (ep, &req->req); | |
2184 | } | |
2185 | } | |
2186 | ||
2187 | static struct net2280_ep * | |
2188 | get_ep_by_addr (struct net2280 *dev, u16 wIndex) | |
2189 | { | |
2190 | struct net2280_ep *ep; | |
2191 | ||
2192 | if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0) | |
2193 | return &dev->ep [0]; | |
2194 | list_for_each_entry (ep, &dev->gadget.ep_list, ep.ep_list) { | |
2195 | u8 bEndpointAddress; | |
2196 | ||
2197 | if (!ep->desc) | |
2198 | continue; | |
2199 | bEndpointAddress = ep->desc->bEndpointAddress; | |
2200 | if ((wIndex ^ bEndpointAddress) & USB_DIR_IN) | |
2201 | continue; | |
2202 | if ((wIndex & 0x0f) == (bEndpointAddress & 0x0f)) | |
2203 | return ep; | |
2204 | } | |
2205 | return NULL; | |
2206 | } | |
2207 | ||
2208 | static void handle_stat0_irqs (struct net2280 *dev, u32 stat) | |
2209 | { | |
2210 | struct net2280_ep *ep; | |
2211 | u32 num, scratch; | |
2212 | ||
2213 | /* most of these don't need individual acks */ | |
2214 | stat &= ~(1 << INTA_ASSERTED); | |
2215 | if (!stat) | |
2216 | return; | |
2217 | // DEBUG (dev, "irqstat0 %04x\n", stat); | |
2218 | ||
2219 | /* starting a control request? */ | |
2220 | if (unlikely (stat & (1 << SETUP_PACKET_INTERRUPT))) { | |
2221 | union { | |
2222 | u32 raw [2]; | |
2223 | struct usb_ctrlrequest r; | |
2224 | } u; | |
950ee4c8 | 2225 | int tmp; |
1da177e4 LT |
2226 | struct net2280_request *req; |
2227 | ||
2228 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) { | |
2229 | if (readl (&dev->usb->usbstat) & (1 << HIGH_SPEED)) | |
2230 | dev->gadget.speed = USB_SPEED_HIGH; | |
2231 | else | |
2232 | dev->gadget.speed = USB_SPEED_FULL; | |
2233 | net2280_led_speed (dev, dev->gadget.speed); | |
e538dfda | 2234 | DEBUG(dev, "%s\n", usb_speed_string(dev->gadget.speed)); |
1da177e4 LT |
2235 | } |
2236 | ||
2237 | ep = &dev->ep [0]; | |
2238 | ep->irqs++; | |
2239 | ||
2240 | /* make sure any leftover request state is cleared */ | |
2241 | stat &= ~(1 << ENDPOINT_0_INTERRUPT); | |
2242 | while (!list_empty (&ep->queue)) { | |
2243 | req = list_entry (ep->queue.next, | |
2244 | struct net2280_request, queue); | |
2245 | done (ep, req, (req->req.actual == req->req.length) | |
2246 | ? 0 : -EPROTO); | |
2247 | } | |
2248 | ep->stopped = 0; | |
2249 | dev->protocol_stall = 0; | |
950ee4c8 GL |
2250 | |
2251 | if (ep->dev->pdev->device == 0x2280) | |
2252 | tmp = (1 << FIFO_OVERFLOW) | |
2253 | | (1 << FIFO_UNDERFLOW); | |
2254 | else | |
2255 | tmp = 0; | |
2256 | ||
2257 | writel (tmp | (1 << TIMEOUT) | |
1da177e4 LT |
2258 | | (1 << USB_STALL_SENT) |
2259 | | (1 << USB_IN_NAK_SENT) | |
2260 | | (1 << USB_IN_ACK_RCVD) | |
2261 | | (1 << USB_OUT_PING_NAK_SENT) | |
2262 | | (1 << USB_OUT_ACK_SENT) | |
1da177e4 LT |
2263 | | (1 << SHORT_PACKET_OUT_DONE_INTERRUPT) |
2264 | | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT) | |
2265 | | (1 << DATA_PACKET_RECEIVED_INTERRUPT) | |
2266 | | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT) | |
2267 | | (1 << DATA_OUT_PING_TOKEN_INTERRUPT) | |
2268 | | (1 << DATA_IN_TOKEN_INTERRUPT) | |
2269 | , &ep->regs->ep_stat); | |
2270 | u.raw [0] = readl (&dev->usb->setup0123); | |
2271 | u.raw [1] = readl (&dev->usb->setup4567); | |
901b3d75 | 2272 | |
1da177e4 LT |
2273 | cpu_to_le32s (&u.raw [0]); |
2274 | cpu_to_le32s (&u.raw [1]); | |
2275 | ||
950ee4c8 GL |
2276 | tmp = 0; |
2277 | ||
01ee7d70 DB |
2278 | #define w_value le16_to_cpu(u.r.wValue) |
2279 | #define w_index le16_to_cpu(u.r.wIndex) | |
2280 | #define w_length le16_to_cpu(u.r.wLength) | |
1da177e4 LT |
2281 | |
2282 | /* ack the irq */ | |
2283 | writel (1 << SETUP_PACKET_INTERRUPT, &dev->regs->irqstat0); | |
2284 | stat ^= (1 << SETUP_PACKET_INTERRUPT); | |
2285 | ||
2286 | /* watch control traffic at the token level, and force | |
2287 | * synchronization before letting the status stage happen. | |
2288 | * FIXME ignore tokens we'll NAK, until driver responds. | |
2289 | * that'll mean a lot less irqs for some drivers. | |
2290 | */ | |
2291 | ep->is_in = (u.r.bRequestType & USB_DIR_IN) != 0; | |
2292 | if (ep->is_in) { | |
2293 | scratch = (1 << DATA_PACKET_TRANSMITTED_INTERRUPT) | |
2294 | | (1 << DATA_OUT_PING_TOKEN_INTERRUPT) | |
2295 | | (1 << DATA_IN_TOKEN_INTERRUPT); | |
2296 | stop_out_naking (ep); | |
2297 | } else | |
2298 | scratch = (1 << DATA_PACKET_RECEIVED_INTERRUPT) | |
2299 | | (1 << DATA_OUT_PING_TOKEN_INTERRUPT) | |
2300 | | (1 << DATA_IN_TOKEN_INTERRUPT); | |
2301 | writel (scratch, &dev->epregs [0].ep_irqenb); | |
2302 | ||
2303 | /* we made the hardware handle most lowlevel requests; | |
2304 | * everything else goes uplevel to the gadget code. | |
2305 | */ | |
1f26e28d | 2306 | ep->responded = 1; |
1da177e4 LT |
2307 | switch (u.r.bRequest) { |
2308 | case USB_REQ_GET_STATUS: { | |
2309 | struct net2280_ep *e; | |
320f3459 | 2310 | __le32 status; |
1da177e4 LT |
2311 | |
2312 | /* hw handles device and interface status */ | |
2313 | if (u.r.bRequestType != (USB_DIR_IN|USB_RECIP_ENDPOINT)) | |
2314 | goto delegate; | |
320f3459 DB |
2315 | if ((e = get_ep_by_addr (dev, w_index)) == 0 |
2316 | || w_length > 2) | |
1da177e4 LT |
2317 | goto do_stall; |
2318 | ||
2319 | if (readl (&e->regs->ep_rsp) | |
2320 | & (1 << SET_ENDPOINT_HALT)) | |
551509d2 | 2321 | status = cpu_to_le32 (1); |
1da177e4 | 2322 | else |
551509d2 | 2323 | status = cpu_to_le32 (0); |
1da177e4 LT |
2324 | |
2325 | /* don't bother with a request object! */ | |
2326 | writel (0, &dev->epregs [0].ep_irqenb); | |
320f3459 DB |
2327 | set_fifo_bytecount (ep, w_length); |
2328 | writel ((__force u32)status, &dev->epregs [0].ep_data); | |
1da177e4 LT |
2329 | allow_status (ep); |
2330 | VDEBUG (dev, "%s stat %02x\n", ep->ep.name, status); | |
2331 | goto next_endpoints; | |
2332 | } | |
2333 | break; | |
2334 | case USB_REQ_CLEAR_FEATURE: { | |
2335 | struct net2280_ep *e; | |
2336 | ||
2337 | /* hw handles device features */ | |
2338 | if (u.r.bRequestType != USB_RECIP_ENDPOINT) | |
2339 | goto delegate; | |
320f3459 DB |
2340 | if (w_value != USB_ENDPOINT_HALT |
2341 | || w_length != 0) | |
1da177e4 | 2342 | goto do_stall; |
320f3459 | 2343 | if ((e = get_ep_by_addr (dev, w_index)) == 0) |
1da177e4 | 2344 | goto do_stall; |
8066134f AS |
2345 | if (e->wedged) { |
2346 | VDEBUG(dev, "%s wedged, halt not cleared\n", | |
2347 | ep->ep.name); | |
2348 | } else { | |
2349 | VDEBUG(dev, "%s clear halt\n", ep->ep.name); | |
2350 | clear_halt(e); | |
2351 | } | |
1da177e4 | 2352 | allow_status (ep); |
1da177e4 LT |
2353 | goto next_endpoints; |
2354 | } | |
2355 | break; | |
2356 | case USB_REQ_SET_FEATURE: { | |
2357 | struct net2280_ep *e; | |
2358 | ||
2359 | /* hw handles device features */ | |
2360 | if (u.r.bRequestType != USB_RECIP_ENDPOINT) | |
2361 | goto delegate; | |
320f3459 DB |
2362 | if (w_value != USB_ENDPOINT_HALT |
2363 | || w_length != 0) | |
1da177e4 | 2364 | goto do_stall; |
320f3459 | 2365 | if ((e = get_ep_by_addr (dev, w_index)) == 0) |
1da177e4 | 2366 | goto do_stall; |
8066134f AS |
2367 | if (e->ep.name == ep0name) |
2368 | goto do_stall; | |
1da177e4 LT |
2369 | set_halt (e); |
2370 | allow_status (ep); | |
2371 | VDEBUG (dev, "%s set halt\n", ep->ep.name); | |
2372 | goto next_endpoints; | |
2373 | } | |
2374 | break; | |
2375 | default: | |
2376 | delegate: | |
fec8de3a | 2377 | VDEBUG (dev, "setup %02x.%02x v%04x i%04x l%04x " |
1da177e4 LT |
2378 | "ep_cfg %08x\n", |
2379 | u.r.bRequestType, u.r.bRequest, | |
320f3459 | 2380 | w_value, w_index, w_length, |
1da177e4 | 2381 | readl (&ep->regs->ep_cfg)); |
1f26e28d | 2382 | ep->responded = 0; |
1da177e4 LT |
2383 | spin_unlock (&dev->lock); |
2384 | tmp = dev->driver->setup (&dev->gadget, &u.r); | |
2385 | spin_lock (&dev->lock); | |
2386 | } | |
2387 | ||
2388 | /* stall ep0 on error */ | |
2389 | if (tmp < 0) { | |
2390 | do_stall: | |
2391 | VDEBUG (dev, "req %02x.%02x protocol STALL; stat %d\n", | |
2392 | u.r.bRequestType, u.r.bRequest, tmp); | |
2393 | dev->protocol_stall = 1; | |
2394 | } | |
2395 | ||
2396 | /* some in/out token irq should follow; maybe stall then. | |
2397 | * driver must queue a request (even zlp) or halt ep0 | |
2398 | * before the host times out. | |
2399 | */ | |
2400 | } | |
2401 | ||
320f3459 DB |
2402 | #undef w_value |
2403 | #undef w_index | |
2404 | #undef w_length | |
2405 | ||
1da177e4 LT |
2406 | next_endpoints: |
2407 | /* endpoint data irq ? */ | |
2408 | scratch = stat & 0x7f; | |
2409 | stat &= ~0x7f; | |
2410 | for (num = 0; scratch; num++) { | |
2411 | u32 t; | |
2412 | ||
2413 | /* do this endpoint's FIFO and queue need tending? */ | |
2414 | t = 1 << num; | |
2415 | if ((scratch & t) == 0) | |
2416 | continue; | |
2417 | scratch ^= t; | |
2418 | ||
2419 | ep = &dev->ep [num]; | |
2420 | handle_ep_small (ep); | |
2421 | } | |
2422 | ||
2423 | if (stat) | |
2424 | DEBUG (dev, "unhandled irqstat0 %08x\n", stat); | |
2425 | } | |
2426 | ||
2427 | #define DMA_INTERRUPTS ( \ | |
2428 | (1 << DMA_D_INTERRUPT) \ | |
2429 | | (1 << DMA_C_INTERRUPT) \ | |
2430 | | (1 << DMA_B_INTERRUPT) \ | |
2431 | | (1 << DMA_A_INTERRUPT)) | |
2432 | #define PCI_ERROR_INTERRUPTS ( \ | |
2433 | (1 << PCI_MASTER_ABORT_RECEIVED_INTERRUPT) \ | |
2434 | | (1 << PCI_TARGET_ABORT_RECEIVED_INTERRUPT) \ | |
2435 | | (1 << PCI_RETRY_ABORT_INTERRUPT)) | |
2436 | ||
2437 | static void handle_stat1_irqs (struct net2280 *dev, u32 stat) | |
2438 | { | |
2439 | struct net2280_ep *ep; | |
2440 | u32 tmp, num, mask, scratch; | |
2441 | ||
2442 | /* after disconnect there's nothing else to do! */ | |
2443 | tmp = (1 << VBUS_INTERRUPT) | (1 << ROOT_PORT_RESET_INTERRUPT); | |
2444 | mask = (1 << HIGH_SPEED) | (1 << FULL_SPEED); | |
2445 | ||
2446 | /* VBUS disconnect is indicated by VBUS_PIN and VBUS_INTERRUPT set. | |
fb914ebf | 2447 | * Root Port Reset is indicated by ROOT_PORT_RESET_INTERRUPT set and |
901b3d75 | 2448 | * both HIGH_SPEED and FULL_SPEED clear (as ROOT_PORT_RESET_INTERRUPT |
1da177e4 LT |
2449 | * only indicates a change in the reset state). |
2450 | */ | |
2451 | if (stat & tmp) { | |
2452 | writel (tmp, &dev->regs->irqstat1); | |
901b3d75 DB |
2453 | if ((((stat & (1 << ROOT_PORT_RESET_INTERRUPT)) |
2454 | && ((readl (&dev->usb->usbstat) & mask) | |
2455 | == 0)) | |
2456 | || ((readl (&dev->usb->usbctl) | |
2457 | & (1 << VBUS_PIN)) == 0) | |
1da177e4 LT |
2458 | ) && ( dev->gadget.speed != USB_SPEED_UNKNOWN)) { |
2459 | DEBUG (dev, "disconnect %s\n", | |
2460 | dev->driver->driver.name); | |
2461 | stop_activity (dev, dev->driver); | |
2462 | ep0_start (dev); | |
2463 | return; | |
2464 | } | |
2465 | stat &= ~tmp; | |
2466 | ||
2467 | /* vBUS can bounce ... one of many reasons to ignore the | |
2468 | * notion of hotplug events on bus connect/disconnect! | |
2469 | */ | |
2470 | if (!stat) | |
2471 | return; | |
2472 | } | |
2473 | ||
2474 | /* NOTE: chip stays in PCI D0 state for now, but it could | |
2475 | * enter D1 to save more power | |
2476 | */ | |
2477 | tmp = (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT); | |
2478 | if (stat & tmp) { | |
2479 | writel (tmp, &dev->regs->irqstat1); | |
2480 | if (stat & (1 << SUSPEND_REQUEST_INTERRUPT)) { | |
2481 | if (dev->driver->suspend) | |
2482 | dev->driver->suspend (&dev->gadget); | |
2483 | if (!enable_suspend) | |
2484 | stat &= ~(1 << SUSPEND_REQUEST_INTERRUPT); | |
2485 | } else { | |
2486 | if (dev->driver->resume) | |
2487 | dev->driver->resume (&dev->gadget); | |
2488 | /* at high speed, note erratum 0133 */ | |
2489 | } | |
2490 | stat &= ~tmp; | |
2491 | } | |
2492 | ||
2493 | /* clear any other status/irqs */ | |
2494 | if (stat) | |
2495 | writel (stat, &dev->regs->irqstat1); | |
2496 | ||
2497 | /* some status we can just ignore */ | |
950ee4c8 GL |
2498 | if (dev->pdev->device == 0x2280) |
2499 | stat &= ~((1 << CONTROL_STATUS_INTERRUPT) | |
2500 | | (1 << SUSPEND_REQUEST_INTERRUPT) | |
2501 | | (1 << RESUME_INTERRUPT) | |
2502 | | (1 << SOF_INTERRUPT)); | |
2503 | else | |
2504 | stat &= ~((1 << CONTROL_STATUS_INTERRUPT) | |
2505 | | (1 << RESUME_INTERRUPT) | |
2506 | | (1 << SOF_DOWN_INTERRUPT) | |
2507 | | (1 << SOF_INTERRUPT)); | |
2508 | ||
1da177e4 LT |
2509 | if (!stat) |
2510 | return; | |
2511 | // DEBUG (dev, "irqstat1 %08x\n", stat); | |
2512 | ||
2513 | /* DMA status, for ep-{a,b,c,d} */ | |
2514 | scratch = stat & DMA_INTERRUPTS; | |
2515 | stat &= ~DMA_INTERRUPTS; | |
2516 | scratch >>= 9; | |
2517 | for (num = 0; scratch; num++) { | |
2518 | struct net2280_dma_regs __iomem *dma; | |
2519 | ||
2520 | tmp = 1 << num; | |
2521 | if ((tmp & scratch) == 0) | |
2522 | continue; | |
2523 | scratch ^= tmp; | |
2524 | ||
2525 | ep = &dev->ep [num + 1]; | |
2526 | dma = ep->dma; | |
2527 | ||
2528 | if (!dma) | |
2529 | continue; | |
2530 | ||
2531 | /* clear ep's dma status */ | |
2532 | tmp = readl (&dma->dmastat); | |
2533 | writel (tmp, &dma->dmastat); | |
2534 | ||
2535 | /* chaining should stop on abort, short OUT from fifo, | |
2536 | * or (stat0 codepath) short OUT transfer. | |
2537 | */ | |
2538 | if (!use_dma_chaining) { | |
2539 | if ((tmp & (1 << DMA_TRANSACTION_DONE_INTERRUPT)) | |
2540 | == 0) { | |
2541 | DEBUG (ep->dev, "%s no xact done? %08x\n", | |
2542 | ep->ep.name, tmp); | |
2543 | continue; | |
2544 | } | |
2545 | stop_dma (ep->dma); | |
2546 | } | |
2547 | ||
2548 | /* OUT transfers terminate when the data from the | |
2549 | * host is in our memory. Process whatever's done. | |
2550 | * On this path, we know transfer's last packet wasn't | |
2551 | * less than req->length. NAK_OUT_PACKETS may be set, | |
2552 | * or the FIFO may already be holding new packets. | |
2553 | * | |
2554 | * IN transfers can linger in the FIFO for a very | |
2555 | * long time ... we ignore that for now, accounting | |
2556 | * precisely (like PIO does) needs per-packet irqs | |
2557 | */ | |
2558 | scan_dma_completions (ep); | |
2559 | ||
2560 | /* disable dma on inactive queues; else maybe restart */ | |
2561 | if (list_empty (&ep->queue)) { | |
2562 | if (use_dma_chaining) | |
2563 | stop_dma (ep->dma); | |
2564 | } else { | |
2565 | tmp = readl (&dma->dmactl); | |
2566 | if (!use_dma_chaining | |
2567 | || (tmp & (1 << DMA_ENABLE)) == 0) | |
2568 | restart_dma (ep); | |
2569 | else if (ep->is_in && use_dma_chaining) { | |
2570 | struct net2280_request *req; | |
320f3459 | 2571 | __le32 dmacount; |
1da177e4 LT |
2572 | |
2573 | /* the descriptor at the head of the chain | |
2574 | * may still have VALID_BIT clear; that's | |
2575 | * used to trigger changing DMA_FIFO_VALIDATE | |
2576 | * (affects automagic zlp writes). | |
2577 | */ | |
2578 | req = list_entry (ep->queue.next, | |
2579 | struct net2280_request, queue); | |
2580 | dmacount = req->td->dmacount; | |
551509d2 | 2581 | dmacount &= cpu_to_le32 ( |
1da177e4 LT |
2582 | (1 << VALID_BIT) |
2583 | | DMA_BYTE_COUNT_MASK); | |
2584 | if (dmacount && (dmacount & valid_bit) == 0) | |
2585 | restart_dma (ep); | |
2586 | } | |
2587 | } | |
2588 | ep->irqs++; | |
2589 | } | |
2590 | ||
2591 | /* NOTE: there are other PCI errors we might usefully notice. | |
2592 | * if they appear very often, here's where to try recovering. | |
2593 | */ | |
2594 | if (stat & PCI_ERROR_INTERRUPTS) { | |
2595 | ERROR (dev, "pci dma error; stat %08x\n", stat); | |
2596 | stat &= ~PCI_ERROR_INTERRUPTS; | |
2597 | /* these are fatal errors, but "maybe" they won't | |
2598 | * happen again ... | |
2599 | */ | |
2600 | stop_activity (dev, dev->driver); | |
2601 | ep0_start (dev); | |
2602 | stat = 0; | |
2603 | } | |
2604 | ||
2605 | if (stat) | |
2606 | DEBUG (dev, "unhandled irqstat1 %08x\n", stat); | |
2607 | } | |
2608 | ||
7d12e780 | 2609 | static irqreturn_t net2280_irq (int irq, void *_dev) |
1da177e4 LT |
2610 | { |
2611 | struct net2280 *dev = _dev; | |
2612 | ||
658ad5e0 AS |
2613 | /* shared interrupt, not ours */ |
2614 | if (!(readl(&dev->regs->irqstat0) & (1 << INTA_ASSERTED))) | |
2615 | return IRQ_NONE; | |
2616 | ||
1da177e4 LT |
2617 | spin_lock (&dev->lock); |
2618 | ||
2619 | /* handle disconnect, dma, and more */ | |
2620 | handle_stat1_irqs (dev, readl (&dev->regs->irqstat1)); | |
2621 | ||
2622 | /* control requests and PIO */ | |
2623 | handle_stat0_irqs (dev, readl (&dev->regs->irqstat0)); | |
2624 | ||
2625 | spin_unlock (&dev->lock); | |
2626 | ||
2627 | return IRQ_HANDLED; | |
2628 | } | |
2629 | ||
2630 | /*-------------------------------------------------------------------------*/ | |
2631 | ||
2632 | static void gadget_release (struct device *_dev) | |
2633 | { | |
2634 | struct net2280 *dev = dev_get_drvdata (_dev); | |
2635 | ||
2636 | kfree (dev); | |
2637 | } | |
2638 | ||
2639 | /* tear down the binding between this driver and the pci device */ | |
2640 | ||
2641 | static void net2280_remove (struct pci_dev *pdev) | |
2642 | { | |
2643 | struct net2280 *dev = pci_get_drvdata (pdev); | |
2644 | ||
0f91349b SAS |
2645 | usb_del_gadget_udc(&dev->gadget); |
2646 | ||
6bea476c | 2647 | BUG_ON(dev->driver); |
1da177e4 LT |
2648 | |
2649 | /* then clean up the resources we allocated during probe() */ | |
2650 | net2280_led_shutdown (dev); | |
2651 | if (dev->requests) { | |
2652 | int i; | |
2653 | for (i = 1; i < 5; i++) { | |
2654 | if (!dev->ep [i].dummy) | |
2655 | continue; | |
2656 | pci_pool_free (dev->requests, dev->ep [i].dummy, | |
2657 | dev->ep [i].td_dma); | |
2658 | } | |
2659 | pci_pool_destroy (dev->requests); | |
2660 | } | |
2661 | if (dev->got_irq) | |
2662 | free_irq (pdev->irq, dev); | |
2663 | if (dev->regs) | |
2664 | iounmap (dev->regs); | |
2665 | if (dev->region) | |
2666 | release_mem_region (pci_resource_start (pdev, 0), | |
2667 | pci_resource_len (pdev, 0)); | |
2668 | if (dev->enabled) | |
2669 | pci_disable_device (pdev); | |
2670 | device_unregister (&dev->gadget.dev); | |
2671 | device_remove_file (&pdev->dev, &dev_attr_registers); | |
2672 | pci_set_drvdata (pdev, NULL); | |
2673 | ||
2674 | INFO (dev, "unbind\n"); | |
1da177e4 LT |
2675 | } |
2676 | ||
2677 | /* wrap this driver around the specified device, but | |
2678 | * don't respond over USB until a gadget driver binds to us. | |
2679 | */ | |
2680 | ||
2681 | static int net2280_probe (struct pci_dev *pdev, const struct pci_device_id *id) | |
2682 | { | |
2683 | struct net2280 *dev; | |
2684 | unsigned long resource, len; | |
2685 | void __iomem *base = NULL; | |
2686 | int retval, i; | |
1da177e4 | 2687 | |
1da177e4 | 2688 | /* alloc, and start init */ |
e94b1766 | 2689 | dev = kzalloc (sizeof *dev, GFP_KERNEL); |
1da177e4 LT |
2690 | if (dev == NULL){ |
2691 | retval = -ENOMEM; | |
2692 | goto done; | |
2693 | } | |
2694 | ||
9fb81ce6 | 2695 | pci_set_drvdata (pdev, dev); |
1da177e4 LT |
2696 | spin_lock_init (&dev->lock); |
2697 | dev->pdev = pdev; | |
2698 | dev->gadget.ops = &net2280_ops; | |
d327ab5b | 2699 | dev->gadget.max_speed = USB_SPEED_HIGH; |
1da177e4 LT |
2700 | |
2701 | /* the "gadget" abstracts/virtualizes the controller */ | |
0031a06e | 2702 | dev_set_name(&dev->gadget.dev, "gadget"); |
1da177e4 LT |
2703 | dev->gadget.dev.parent = &pdev->dev; |
2704 | dev->gadget.dev.dma_mask = pdev->dev.dma_mask; | |
2705 | dev->gadget.dev.release = gadget_release; | |
2706 | dev->gadget.name = driver_name; | |
2707 | ||
2708 | /* now all the pci goodies ... */ | |
2709 | if (pci_enable_device (pdev) < 0) { | |
901b3d75 | 2710 | retval = -ENODEV; |
1da177e4 LT |
2711 | goto done; |
2712 | } | |
2713 | dev->enabled = 1; | |
2714 | ||
2715 | /* BAR 0 holds all the registers | |
2716 | * BAR 1 is 8051 memory; unused here (note erratum 0103) | |
2717 | * BAR 2 is fifo memory; unused here | |
2718 | */ | |
2719 | resource = pci_resource_start (pdev, 0); | |
2720 | len = pci_resource_len (pdev, 0); | |
2721 | if (!request_mem_region (resource, len, driver_name)) { | |
2722 | DEBUG (dev, "controller already in use\n"); | |
2723 | retval = -EBUSY; | |
2724 | goto done; | |
2725 | } | |
2726 | dev->region = 1; | |
2727 | ||
901b3d75 DB |
2728 | /* FIXME provide firmware download interface to put |
2729 | * 8051 code into the chip, e.g. to turn on PCI PM. | |
2730 | */ | |
2731 | ||
1da177e4 LT |
2732 | base = ioremap_nocache (resource, len); |
2733 | if (base == NULL) { | |
2734 | DEBUG (dev, "can't map memory\n"); | |
2735 | retval = -EFAULT; | |
2736 | goto done; | |
2737 | } | |
2738 | dev->regs = (struct net2280_regs __iomem *) base; | |
2739 | dev->usb = (struct net2280_usb_regs __iomem *) (base + 0x0080); | |
2740 | dev->pci = (struct net2280_pci_regs __iomem *) (base + 0x0100); | |
2741 | dev->dma = (struct net2280_dma_regs __iomem *) (base + 0x0180); | |
2742 | dev->dep = (struct net2280_dep_regs __iomem *) (base + 0x0200); | |
2743 | dev->epregs = (struct net2280_ep_regs __iomem *) (base + 0x0300); | |
2744 | ||
2745 | /* put into initial config, link up all endpoints */ | |
2746 | writel (0, &dev->usb->usbctl); | |
2747 | usb_reset (dev); | |
2748 | usb_reinit (dev); | |
2749 | ||
2750 | /* irq setup after old hardware is cleaned up */ | |
2751 | if (!pdev->irq) { | |
2752 | ERROR (dev, "No IRQ. Check PCI setup!\n"); | |
2753 | retval = -ENODEV; | |
2754 | goto done; | |
2755 | } | |
c6387a48 | 2756 | |
d54b5caa | 2757 | if (request_irq (pdev->irq, net2280_irq, IRQF_SHARED, driver_name, dev) |
1da177e4 | 2758 | != 0) { |
c6387a48 | 2759 | ERROR (dev, "request interrupt %d failed\n", pdev->irq); |
1da177e4 LT |
2760 | retval = -EBUSY; |
2761 | goto done; | |
2762 | } | |
2763 | dev->got_irq = 1; | |
2764 | ||
2765 | /* DMA setup */ | |
2766 | /* NOTE: we know only the 32 LSBs of dma addresses may be nonzero */ | |
2767 | dev->requests = pci_pool_create ("requests", pdev, | |
2768 | sizeof (struct net2280_dma), | |
2769 | 0 /* no alignment requirements */, | |
2770 | 0 /* or page-crossing issues */); | |
2771 | if (!dev->requests) { | |
2772 | DEBUG (dev, "can't get request pool\n"); | |
2773 | retval = -ENOMEM; | |
2774 | goto done; | |
2775 | } | |
2776 | for (i = 1; i < 5; i++) { | |
2777 | struct net2280_dma *td; | |
2778 | ||
2779 | td = pci_pool_alloc (dev->requests, GFP_KERNEL, | |
2780 | &dev->ep [i].td_dma); | |
2781 | if (!td) { | |
2782 | DEBUG (dev, "can't get dummy %d\n", i); | |
2783 | retval = -ENOMEM; | |
2784 | goto done; | |
2785 | } | |
2786 | td->dmacount = 0; /* not VALID */ | |
551509d2 | 2787 | td->dmaaddr = cpu_to_le32 (DMA_ADDR_INVALID); |
1da177e4 LT |
2788 | td->dmadesc = td->dmaaddr; |
2789 | dev->ep [i].dummy = td; | |
2790 | } | |
2791 | ||
2792 | /* enable lower-overhead pci memory bursts during DMA */ | |
2793 | writel ( (1 << DMA_MEMORY_WRITE_AND_INVALIDATE_ENABLE) | |
2794 | // 256 write retries may not be enough... | |
2795 | // | (1 << PCI_RETRY_ABORT_ENABLE) | |
2796 | | (1 << DMA_READ_MULTIPLE_ENABLE) | |
2797 | | (1 << DMA_READ_LINE_ENABLE) | |
2798 | , &dev->pci->pcimstctl); | |
2799 | /* erratum 0115 shouldn't appear: Linux inits PCI_LATENCY_TIMER */ | |
2800 | pci_set_master (pdev); | |
694625c0 | 2801 | pci_try_set_mwi (pdev); |
1da177e4 LT |
2802 | |
2803 | /* ... also flushes any posted pci writes */ | |
2804 | dev->chiprev = get_idx_reg (dev->regs, REG_CHIPREV) & 0xffff; | |
2805 | ||
2806 | /* done */ | |
1da177e4 | 2807 | INFO (dev, "%s\n", driver_desc); |
c6387a48 DM |
2808 | INFO (dev, "irq %d, pci mem %p, chip rev %04x\n", |
2809 | pdev->irq, base, dev->chiprev); | |
1da177e4 LT |
2810 | INFO (dev, "version: " DRIVER_VERSION "; dma %s\n", |
2811 | use_dma | |
2812 | ? (use_dma_chaining ? "chaining" : "enabled") | |
2813 | : "disabled"); | |
b3899dac JG |
2814 | retval = device_register (&dev->gadget.dev); |
2815 | if (retval) goto done; | |
2816 | retval = device_create_file (&pdev->dev, &dev_attr_registers); | |
2817 | if (retval) goto done; | |
1da177e4 | 2818 | |
0f91349b SAS |
2819 | retval = usb_add_gadget_udc(&pdev->dev, &dev->gadget); |
2820 | if (retval) | |
2821 | goto done; | |
1da177e4 LT |
2822 | return 0; |
2823 | ||
2824 | done: | |
2825 | if (dev) | |
2826 | net2280_remove (pdev); | |
2827 | return retval; | |
2828 | } | |
2829 | ||
2d61bde7 AS |
2830 | /* make sure the board is quiescent; otherwise it will continue |
2831 | * generating IRQs across the upcoming reboot. | |
2832 | */ | |
2833 | ||
2834 | static void net2280_shutdown (struct pci_dev *pdev) | |
2835 | { | |
2836 | struct net2280 *dev = pci_get_drvdata (pdev); | |
2837 | ||
2838 | /* disable IRQs */ | |
2839 | writel (0, &dev->regs->pciirqenb0); | |
2840 | writel (0, &dev->regs->pciirqenb1); | |
2841 | ||
2842 | /* disable the pullup so the host will think we're gone */ | |
2843 | writel (0, &dev->usb->usbctl); | |
2844 | } | |
2845 | ||
1da177e4 LT |
2846 | |
2847 | /*-------------------------------------------------------------------------*/ | |
2848 | ||
901b3d75 DB |
2849 | static const struct pci_device_id pci_ids [] = { { |
2850 | .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), | |
2851 | .class_mask = ~0, | |
1da177e4 LT |
2852 | .vendor = 0x17cc, |
2853 | .device = 0x2280, | |
2854 | .subvendor = PCI_ANY_ID, | |
2855 | .subdevice = PCI_ANY_ID, | |
950ee4c8 | 2856 | }, { |
901b3d75 DB |
2857 | .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), |
2858 | .class_mask = ~0, | |
950ee4c8 GL |
2859 | .vendor = 0x17cc, |
2860 | .device = 0x2282, | |
2861 | .subvendor = PCI_ANY_ID, | |
2862 | .subdevice = PCI_ANY_ID, | |
1da177e4 LT |
2863 | |
2864 | }, { /* end: all zeroes */ } | |
2865 | }; | |
2866 | MODULE_DEVICE_TABLE (pci, pci_ids); | |
2867 | ||
2868 | /* pci driver glue; this is a "new style" PCI driver module */ | |
2869 | static struct pci_driver net2280_pci_driver = { | |
2870 | .name = (char *) driver_name, | |
2871 | .id_table = pci_ids, | |
2872 | ||
2873 | .probe = net2280_probe, | |
2874 | .remove = net2280_remove, | |
2d61bde7 | 2875 | .shutdown = net2280_shutdown, |
1da177e4 LT |
2876 | |
2877 | /* FIXME add power management support */ | |
2878 | }; | |
2879 | ||
2880 | MODULE_DESCRIPTION (DRIVER_DESC); | |
2881 | MODULE_AUTHOR ("David Brownell"); | |
2882 | MODULE_LICENSE ("GPL"); | |
2883 | ||
2884 | static int __init init (void) | |
2885 | { | |
2886 | if (!use_dma) | |
2887 | use_dma_chaining = 0; | |
2888 | return pci_register_driver (&net2280_pci_driver); | |
2889 | } | |
2890 | module_init (init); | |
2891 | ||
2892 | static void __exit cleanup (void) | |
2893 | { | |
2894 | pci_unregister_driver (&net2280_pci_driver); | |
2895 | } | |
2896 | module_exit (cleanup); |