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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0+ |
ceb80363 SL |
2 | /* |
3 | * Driver for PLX NET2272 USB device controller | |
4 | * | |
5 | * Copyright (C) 2005-2006 PLX Technology, Inc. | |
6 | * Copyright (C) 2006-2011 Analog Devices, Inc. | |
ceb80363 SL |
7 | */ |
8 | ||
9 | #include <linux/delay.h> | |
10 | #include <linux/device.h> | |
11 | #include <linux/errno.h> | |
ceb80363 SL |
12 | #include <linux/init.h> |
13 | #include <linux/interrupt.h> | |
14 | #include <linux/io.h> | |
15 | #include <linux/ioport.h> | |
ceb80363 SL |
16 | #include <linux/kernel.h> |
17 | #include <linux/list.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/moduleparam.h> | |
20 | #include <linux/pci.h> | |
21 | #include <linux/platform_device.h> | |
d84d6615 | 22 | #include <linux/prefetch.h> |
ceb80363 SL |
23 | #include <linux/sched.h> |
24 | #include <linux/slab.h> | |
25 | #include <linux/timer.h> | |
26 | #include <linux/usb.h> | |
27 | #include <linux/usb/ch9.h> | |
28 | #include <linux/usb/gadget.h> | |
29 | ||
30 | #include <asm/byteorder.h> | |
ceb80363 SL |
31 | #include <asm/unaligned.h> |
32 | ||
33 | #include "net2272.h" | |
34 | ||
35 | #define DRIVER_DESC "PLX NET2272 USB Peripheral Controller" | |
36 | ||
37 | static const char driver_name[] = "net2272"; | |
38 | static const char driver_vers[] = "2006 October 17/mainline"; | |
39 | static const char driver_desc[] = DRIVER_DESC; | |
40 | ||
41 | static const char ep0name[] = "ep0"; | |
42 | static const char * const ep_name[] = { | |
43 | ep0name, | |
44 | "ep-a", "ep-b", "ep-c", | |
45 | }; | |
46 | ||
eda81bea | 47 | #ifdef CONFIG_USB_NET2272_DMA |
ceb80363 SL |
48 | /* |
49 | * use_dma: the NET2272 can use an external DMA controller. | |
50 | * Note that since there is no generic DMA api, some functions, | |
51 | * notably request_dma, start_dma, and cancel_dma will need to be | |
52 | * modified for your platform's particular dma controller. | |
53 | * | |
54 | * If use_dma is disabled, pio will be used instead. | |
55 | */ | |
fe4ff117 | 56 | static bool use_dma = false; |
ceb80363 SL |
57 | module_param(use_dma, bool, 0644); |
58 | ||
59 | /* | |
60 | * dma_ep: selects the endpoint for use with dma (1=ep-a, 2=ep-b) | |
61 | * The NET2272 can only use dma for a single endpoint at a time. | |
62 | * At some point this could be modified to allow either endpoint | |
63 | * to take control of dma as it becomes available. | |
64 | * | |
65 | * Note that DMA should not be used on OUT endpoints unless it can | |
66 | * be guaranteed that no short packets will arrive on an IN endpoint | |
67 | * while the DMA operation is pending. Otherwise the OUT DMA will | |
68 | * terminate prematurely (See NET2272 Errata 630-0213-0101) | |
69 | */ | |
70 | static ushort dma_ep = 1; | |
71 | module_param(dma_ep, ushort, 0644); | |
72 | ||
73 | /* | |
8666009c | 74 | * dma_mode: net2272 dma mode setting (see LOCCTL1 definition): |
ceb80363 SL |
75 | * mode 0 == Slow DREQ mode |
76 | * mode 1 == Fast DREQ mode | |
77 | * mode 2 == Burst mode | |
78 | */ | |
79 | static ushort dma_mode = 2; | |
80 | module_param(dma_mode, ushort, 0644); | |
81 | #else | |
82 | #define use_dma 0 | |
83 | #define dma_ep 1 | |
84 | #define dma_mode 2 | |
85 | #endif | |
86 | ||
87 | /* | |
88 | * fifo_mode: net2272 buffer configuration: | |
89 | * mode 0 == ep-{a,b,c} 512db each | |
90 | * mode 1 == ep-a 1k, ep-{b,c} 512db | |
91 | * mode 2 == ep-a 1k, ep-b 1k, ep-c 512db | |
92 | * mode 3 == ep-a 1k, ep-b disabled, ep-c 512db | |
93 | */ | |
c962af85 | 94 | static ushort fifo_mode; |
ceb80363 SL |
95 | module_param(fifo_mode, ushort, 0644); |
96 | ||
97 | /* | |
98 | * enable_suspend: When enabled, the driver will respond to | |
99 | * USB suspend requests by powering down the NET2272. Otherwise, | |
8666009c | 100 | * USB suspend requests will be ignored. This is acceptable for |
ceb80363 SL |
101 | * self-powered devices. For bus powered devices set this to 1. |
102 | */ | |
c962af85 | 103 | static ushort enable_suspend; |
ceb80363 SL |
104 | module_param(enable_suspend, ushort, 0644); |
105 | ||
106 | static void assert_out_naking(struct net2272_ep *ep, const char *where) | |
107 | { | |
108 | u8 tmp; | |
109 | ||
110 | #ifndef DEBUG | |
111 | return; | |
112 | #endif | |
113 | ||
114 | tmp = net2272_ep_read(ep, EP_STAT0); | |
115 | if ((tmp & (1 << NAK_OUT_PACKETS)) == 0) { | |
116 | dev_dbg(ep->dev->dev, "%s %s %02x !NAK\n", | |
117 | ep->ep.name, where, tmp); | |
118 | net2272_ep_write(ep, EP_RSPSET, 1 << ALT_NAK_OUT_PACKETS); | |
119 | } | |
120 | } | |
121 | #define ASSERT_OUT_NAKING(ep) assert_out_naking(ep, __func__) | |
122 | ||
123 | static void stop_out_naking(struct net2272_ep *ep) | |
124 | { | |
125 | u8 tmp = net2272_ep_read(ep, EP_STAT0); | |
126 | ||
127 | if ((tmp & (1 << NAK_OUT_PACKETS)) != 0) | |
128 | net2272_ep_write(ep, EP_RSPCLR, 1 << ALT_NAK_OUT_PACKETS); | |
129 | } | |
130 | ||
131 | #define PIPEDIR(bAddress) (usb_pipein(bAddress) ? "in" : "out") | |
132 | ||
133 | static char *type_string(u8 bmAttributes) | |
134 | { | |
135 | switch ((bmAttributes) & USB_ENDPOINT_XFERTYPE_MASK) { | |
136 | case USB_ENDPOINT_XFER_BULK: return "bulk"; | |
137 | case USB_ENDPOINT_XFER_ISOC: return "iso"; | |
138 | case USB_ENDPOINT_XFER_INT: return "intr"; | |
139 | default: return "control"; | |
140 | } | |
141 | } | |
142 | ||
143 | static char *buf_state_string(unsigned state) | |
144 | { | |
145 | switch (state) { | |
146 | case BUFF_FREE: return "free"; | |
147 | case BUFF_VALID: return "valid"; | |
148 | case BUFF_LCL: return "local"; | |
149 | case BUFF_USB: return "usb"; | |
150 | default: return "unknown"; | |
151 | } | |
152 | } | |
153 | ||
154 | static char *dma_mode_string(void) | |
155 | { | |
156 | if (!use_dma) | |
157 | return "PIO"; | |
158 | switch (dma_mode) { | |
159 | case 0: return "SLOW DREQ"; | |
160 | case 1: return "FAST DREQ"; | |
161 | case 2: return "BURST"; | |
162 | default: return "invalid"; | |
163 | } | |
164 | } | |
165 | ||
166 | static void net2272_dequeue_all(struct net2272_ep *); | |
167 | static int net2272_kick_dma(struct net2272_ep *, struct net2272_request *); | |
168 | static int net2272_fifo_status(struct usb_ep *); | |
169 | ||
977ac789 | 170 | static const struct usb_ep_ops net2272_ep_ops; |
ceb80363 SL |
171 | |
172 | /*---------------------------------------------------------------------------*/ | |
173 | ||
174 | static int | |
175 | net2272_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) | |
176 | { | |
177 | struct net2272 *dev; | |
178 | struct net2272_ep *ep; | |
179 | u32 max; | |
180 | u8 tmp; | |
181 | unsigned long flags; | |
182 | ||
183 | ep = container_of(_ep, struct net2272_ep, ep); | |
184 | if (!_ep || !desc || ep->desc || _ep->name == ep0name | |
185 | || desc->bDescriptorType != USB_DT_ENDPOINT) | |
186 | return -EINVAL; | |
187 | dev = ep->dev; | |
188 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) | |
189 | return -ESHUTDOWN; | |
190 | ||
8c683c43 | 191 | max = usb_endpoint_maxp(desc); |
ceb80363 SL |
192 | |
193 | spin_lock_irqsave(&dev->lock, flags); | |
8c683c43 | 194 | _ep->maxpacket = max; |
ceb80363 SL |
195 | ep->desc = desc; |
196 | ||
197 | /* net2272_ep_reset() has already been called */ | |
198 | ep->stopped = 0; | |
199 | ep->wedged = 0; | |
200 | ||
201 | /* set speed-dependent max packet */ | |
202 | net2272_ep_write(ep, EP_MAXPKT0, max & 0xff); | |
203 | net2272_ep_write(ep, EP_MAXPKT1, (max & 0xff00) >> 8); | |
204 | ||
205 | /* set type, direction, address; reset fifo counters */ | |
206 | net2272_ep_write(ep, EP_STAT1, 1 << BUFFER_FLUSH); | |
207 | tmp = usb_endpoint_type(desc); | |
208 | if (usb_endpoint_xfer_bulk(desc)) { | |
209 | /* catch some particularly blatant driver bugs */ | |
210 | if ((dev->gadget.speed == USB_SPEED_HIGH && max != 512) || | |
211 | (dev->gadget.speed == USB_SPEED_FULL && max > 64)) { | |
212 | spin_unlock_irqrestore(&dev->lock, flags); | |
213 | return -ERANGE; | |
214 | } | |
215 | } | |
216 | ep->is_iso = usb_endpoint_xfer_isoc(desc) ? 1 : 0; | |
217 | tmp <<= ENDPOINT_TYPE; | |
218 | tmp |= ((desc->bEndpointAddress & 0x0f) << ENDPOINT_NUMBER); | |
219 | tmp |= usb_endpoint_dir_in(desc) << ENDPOINT_DIRECTION; | |
220 | tmp |= (1 << ENDPOINT_ENABLE); | |
221 | ||
222 | /* for OUT transfers, block the rx fifo until a read is posted */ | |
223 | ep->is_in = usb_endpoint_dir_in(desc); | |
224 | if (!ep->is_in) | |
225 | net2272_ep_write(ep, EP_RSPSET, 1 << ALT_NAK_OUT_PACKETS); | |
226 | ||
227 | net2272_ep_write(ep, EP_CFG, tmp); | |
228 | ||
229 | /* enable irqs */ | |
230 | tmp = (1 << ep->num) | net2272_read(dev, IRQENB0); | |
231 | net2272_write(dev, IRQENB0, tmp); | |
232 | ||
233 | tmp = (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE) | |
234 | | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE) | |
235 | | net2272_ep_read(ep, EP_IRQENB); | |
236 | net2272_ep_write(ep, EP_IRQENB, tmp); | |
237 | ||
238 | tmp = desc->bEndpointAddress; | |
239 | dev_dbg(dev->dev, "enabled %s (ep%d%s-%s) max %04x cfg %02x\n", | |
240 | _ep->name, tmp & 0x0f, PIPEDIR(tmp), | |
241 | type_string(desc->bmAttributes), max, | |
242 | net2272_ep_read(ep, EP_CFG)); | |
243 | ||
244 | spin_unlock_irqrestore(&dev->lock, flags); | |
245 | return 0; | |
246 | } | |
247 | ||
248 | static void net2272_ep_reset(struct net2272_ep *ep) | |
249 | { | |
250 | u8 tmp; | |
251 | ||
252 | ep->desc = NULL; | |
253 | INIT_LIST_HEAD(&ep->queue); | |
254 | ||
e117e742 | 255 | usb_ep_set_maxpacket_limit(&ep->ep, ~0); |
ceb80363 SL |
256 | ep->ep.ops = &net2272_ep_ops; |
257 | ||
258 | /* disable irqs, endpoint */ | |
259 | net2272_ep_write(ep, EP_IRQENB, 0); | |
260 | ||
261 | /* init to our chosen defaults, notably so that we NAK OUT | |
262 | * packets until the driver queues a read. | |
263 | */ | |
264 | tmp = (1 << NAK_OUT_PACKETS_MODE) | (1 << ALT_NAK_OUT_PACKETS); | |
265 | net2272_ep_write(ep, EP_RSPSET, tmp); | |
266 | ||
267 | tmp = (1 << INTERRUPT_MODE) | (1 << HIDE_STATUS_PHASE); | |
268 | if (ep->num != 0) | |
269 | tmp |= (1 << ENDPOINT_TOGGLE) | (1 << ENDPOINT_HALT); | |
270 | ||
271 | net2272_ep_write(ep, EP_RSPCLR, tmp); | |
272 | ||
273 | /* scrub most status bits, and flush any fifo state */ | |
274 | net2272_ep_write(ep, EP_STAT0, | |
275 | (1 << DATA_IN_TOKEN_INTERRUPT) | |
276 | | (1 << DATA_OUT_TOKEN_INTERRUPT) | |
277 | | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT) | |
278 | | (1 << DATA_PACKET_RECEIVED_INTERRUPT) | |
279 | | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)); | |
280 | ||
281 | net2272_ep_write(ep, EP_STAT1, | |
282 | (1 << TIMEOUT) | |
283 | | (1 << USB_OUT_ACK_SENT) | |
284 | | (1 << USB_OUT_NAK_SENT) | |
285 | | (1 << USB_IN_ACK_RCVD) | |
286 | | (1 << USB_IN_NAK_SENT) | |
287 | | (1 << USB_STALL_SENT) | |
288 | | (1 << LOCAL_OUT_ZLP) | |
289 | | (1 << BUFFER_FLUSH)); | |
290 | ||
8666009c | 291 | /* fifo size is handled separately */ |
ceb80363 SL |
292 | } |
293 | ||
294 | static int net2272_disable(struct usb_ep *_ep) | |
295 | { | |
296 | struct net2272_ep *ep; | |
297 | unsigned long flags; | |
298 | ||
299 | ep = container_of(_ep, struct net2272_ep, ep); | |
300 | if (!_ep || !ep->desc || _ep->name == ep0name) | |
301 | return -EINVAL; | |
302 | ||
303 | spin_lock_irqsave(&ep->dev->lock, flags); | |
304 | net2272_dequeue_all(ep); | |
305 | net2272_ep_reset(ep); | |
306 | ||
307 | dev_vdbg(ep->dev->dev, "disabled %s\n", _ep->name); | |
308 | ||
309 | spin_unlock_irqrestore(&ep->dev->lock, flags); | |
310 | return 0; | |
311 | } | |
312 | ||
313 | /*---------------------------------------------------------------------------*/ | |
314 | ||
315 | static struct usb_request * | |
316 | net2272_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) | |
317 | { | |
ceb80363 SL |
318 | struct net2272_request *req; |
319 | ||
320 | if (!_ep) | |
321 | return NULL; | |
ceb80363 SL |
322 | |
323 | req = kzalloc(sizeof(*req), gfp_flags); | |
324 | if (!req) | |
325 | return NULL; | |
326 | ||
ceb80363 SL |
327 | INIT_LIST_HEAD(&req->queue); |
328 | ||
329 | return &req->req; | |
330 | } | |
331 | ||
332 | static void | |
333 | net2272_free_request(struct usb_ep *_ep, struct usb_request *_req) | |
334 | { | |
ceb80363 SL |
335 | struct net2272_request *req; |
336 | ||
ceb80363 SL |
337 | if (!_ep || !_req) |
338 | return; | |
339 | ||
340 | req = container_of(_req, struct net2272_request, req); | |
341 | WARN_ON(!list_empty(&req->queue)); | |
342 | kfree(req); | |
343 | } | |
344 | ||
345 | static void | |
346 | net2272_done(struct net2272_ep *ep, struct net2272_request *req, int status) | |
347 | { | |
348 | struct net2272 *dev; | |
349 | unsigned stopped = ep->stopped; | |
350 | ||
351 | if (ep->num == 0) { | |
352 | if (ep->dev->protocol_stall) { | |
353 | ep->stopped = 1; | |
354 | set_halt(ep); | |
355 | } | |
356 | allow_status(ep); | |
357 | } | |
358 | ||
359 | list_del_init(&req->queue); | |
360 | ||
361 | if (req->req.status == -EINPROGRESS) | |
362 | req->req.status = status; | |
363 | else | |
364 | status = req->req.status; | |
365 | ||
366 | dev = ep->dev; | |
af93f2c7 FB |
367 | if (use_dma && ep->dma) |
368 | usb_gadget_unmap_request(&dev->gadget, &req->req, | |
369 | ep->is_in); | |
ceb80363 SL |
370 | |
371 | if (status && status != -ESHUTDOWN) | |
372 | dev_vdbg(dev->dev, "complete %s req %p stat %d len %u/%u buf %p\n", | |
373 | ep->ep.name, &req->req, status, | |
374 | req->req.actual, req->req.length, req->req.buf); | |
375 | ||
376 | /* don't modify queue heads during completion callback */ | |
377 | ep->stopped = 1; | |
378 | spin_unlock(&dev->lock); | |
304f7e5e | 379 | usb_gadget_giveback_request(&ep->ep, &req->req); |
ceb80363 SL |
380 | spin_lock(&dev->lock); |
381 | ep->stopped = stopped; | |
382 | } | |
383 | ||
384 | static int | |
385 | net2272_write_packet(struct net2272_ep *ep, u8 *buf, | |
386 | struct net2272_request *req, unsigned max) | |
387 | { | |
388 | u16 __iomem *ep_data = net2272_reg_addr(ep->dev, EP_DATA); | |
389 | u16 *bufp; | |
390 | unsigned length, count; | |
391 | u8 tmp; | |
392 | ||
393 | length = min(req->req.length - req->req.actual, max); | |
394 | req->req.actual += length; | |
395 | ||
396 | dev_vdbg(ep->dev->dev, "write packet %s req %p max %u len %u avail %u\n", | |
397 | ep->ep.name, req, max, length, | |
398 | (net2272_ep_read(ep, EP_AVAIL1) << 8) | net2272_ep_read(ep, EP_AVAIL0)); | |
399 | ||
400 | count = length; | |
401 | bufp = (u16 *)buf; | |
402 | ||
403 | while (likely(count >= 2)) { | |
404 | /* no byte-swap required; chip endian set during init */ | |
405 | writew(*bufp++, ep_data); | |
406 | count -= 2; | |
407 | } | |
408 | buf = (u8 *)bufp; | |
409 | ||
410 | /* write final byte by placing the NET2272 into 8-bit mode */ | |
411 | if (unlikely(count)) { | |
412 | tmp = net2272_read(ep->dev, LOCCTL); | |
413 | net2272_write(ep->dev, LOCCTL, tmp & ~(1 << DATA_WIDTH)); | |
414 | writeb(*buf, ep_data); | |
415 | net2272_write(ep->dev, LOCCTL, tmp); | |
416 | } | |
417 | return length; | |
418 | } | |
419 | ||
420 | /* returns: 0: still running, 1: completed, negative: errno */ | |
421 | static int | |
422 | net2272_write_fifo(struct net2272_ep *ep, struct net2272_request *req) | |
423 | { | |
424 | u8 *buf; | |
425 | unsigned count, max; | |
426 | int status; | |
427 | ||
428 | dev_vdbg(ep->dev->dev, "write_fifo %s actual %d len %d\n", | |
429 | ep->ep.name, req->req.actual, req->req.length); | |
430 | ||
431 | /* | |
432 | * Keep loading the endpoint until the final packet is loaded, | |
433 | * or the endpoint buffer is full. | |
434 | */ | |
435 | top: | |
436 | /* | |
437 | * Clear interrupt status | |
438 | * - Packet Transmitted interrupt will become set again when the | |
439 | * host successfully takes another packet | |
440 | */ | |
441 | net2272_ep_write(ep, EP_STAT0, (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)); | |
442 | while (!(net2272_ep_read(ep, EP_STAT0) & (1 << BUFFER_FULL))) { | |
443 | buf = req->req.buf + req->req.actual; | |
444 | prefetch(buf); | |
445 | ||
446 | /* force pagesel */ | |
447 | net2272_ep_read(ep, EP_STAT0); | |
448 | ||
449 | max = (net2272_ep_read(ep, EP_AVAIL1) << 8) | | |
450 | (net2272_ep_read(ep, EP_AVAIL0)); | |
451 | ||
452 | if (max < ep->ep.maxpacket) | |
453 | max = (net2272_ep_read(ep, EP_AVAIL1) << 8) | |
454 | | (net2272_ep_read(ep, EP_AVAIL0)); | |
455 | ||
456 | count = net2272_write_packet(ep, buf, req, max); | |
457 | /* see if we are done */ | |
458 | if (req->req.length == req->req.actual) { | |
459 | /* validate short or zlp packet */ | |
460 | if (count < ep->ep.maxpacket) | |
461 | set_fifo_bytecount(ep, 0); | |
462 | net2272_done(ep, req, 0); | |
463 | ||
464 | if (!list_empty(&ep->queue)) { | |
465 | req = list_entry(ep->queue.next, | |
466 | struct net2272_request, | |
467 | queue); | |
468 | status = net2272_kick_dma(ep, req); | |
469 | ||
470 | if (status < 0) | |
471 | if ((net2272_ep_read(ep, EP_STAT0) | |
472 | & (1 << BUFFER_EMPTY))) | |
473 | goto top; | |
474 | } | |
475 | return 1; | |
476 | } | |
477 | net2272_ep_write(ep, EP_STAT0, (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)); | |
478 | } | |
479 | return 0; | |
480 | } | |
481 | ||
482 | static void | |
483 | net2272_out_flush(struct net2272_ep *ep) | |
484 | { | |
485 | ASSERT_OUT_NAKING(ep); | |
486 | ||
487 | net2272_ep_write(ep, EP_STAT0, (1 << DATA_OUT_TOKEN_INTERRUPT) | |
488 | | (1 << DATA_PACKET_RECEIVED_INTERRUPT)); | |
489 | net2272_ep_write(ep, EP_STAT1, 1 << BUFFER_FLUSH); | |
490 | } | |
491 | ||
492 | static int | |
493 | net2272_read_packet(struct net2272_ep *ep, u8 *buf, | |
494 | struct net2272_request *req, unsigned avail) | |
495 | { | |
496 | u16 __iomem *ep_data = net2272_reg_addr(ep->dev, EP_DATA); | |
497 | unsigned is_short; | |
498 | u16 *bufp; | |
499 | ||
500 | req->req.actual += avail; | |
501 | ||
502 | dev_vdbg(ep->dev->dev, "read packet %s req %p len %u avail %u\n", | |
503 | ep->ep.name, req, avail, | |
504 | (net2272_ep_read(ep, EP_AVAIL1) << 8) | net2272_ep_read(ep, EP_AVAIL0)); | |
505 | ||
506 | is_short = (avail < ep->ep.maxpacket); | |
507 | ||
508 | if (unlikely(avail == 0)) { | |
509 | /* remove any zlp from the buffer */ | |
510 | (void)readw(ep_data); | |
511 | return is_short; | |
512 | } | |
513 | ||
514 | /* Ensure we get the final byte */ | |
515 | if (unlikely(avail % 2)) | |
516 | avail++; | |
517 | bufp = (u16 *)buf; | |
518 | ||
519 | do { | |
520 | *bufp++ = readw(ep_data); | |
521 | avail -= 2; | |
522 | } while (avail); | |
523 | ||
524 | /* | |
525 | * To avoid false endpoint available race condition must read | |
526 | * ep stat0 twice in the case of a short transfer | |
527 | */ | |
528 | if (net2272_ep_read(ep, EP_STAT0) & (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)) | |
529 | net2272_ep_read(ep, EP_STAT0); | |
530 | ||
531 | return is_short; | |
532 | } | |
533 | ||
534 | static int | |
535 | net2272_read_fifo(struct net2272_ep *ep, struct net2272_request *req) | |
536 | { | |
537 | u8 *buf; | |
538 | unsigned is_short; | |
539 | int count; | |
540 | int tmp; | |
541 | int cleanup = 0; | |
ceb80363 SL |
542 | |
543 | dev_vdbg(ep->dev->dev, "read_fifo %s actual %d len %d\n", | |
544 | ep->ep.name, req->req.actual, req->req.length); | |
545 | ||
546 | top: | |
547 | do { | |
548 | buf = req->req.buf + req->req.actual; | |
549 | prefetchw(buf); | |
550 | ||
551 | count = (net2272_ep_read(ep, EP_AVAIL1) << 8) | |
552 | | net2272_ep_read(ep, EP_AVAIL0); | |
553 | ||
554 | net2272_ep_write(ep, EP_STAT0, | |
555 | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT) | | |
556 | (1 << DATA_PACKET_RECEIVED_INTERRUPT)); | |
557 | ||
558 | tmp = req->req.length - req->req.actual; | |
559 | ||
560 | if (count > tmp) { | |
561 | if ((tmp % ep->ep.maxpacket) != 0) { | |
562 | dev_err(ep->dev->dev, | |
563 | "%s out fifo %d bytes, expected %d\n", | |
564 | ep->ep.name, count, tmp); | |
565 | cleanup = 1; | |
566 | } | |
567 | count = (tmp > 0) ? tmp : 0; | |
568 | } | |
569 | ||
570 | is_short = net2272_read_packet(ep, buf, req, count); | |
571 | ||
572 | /* completion */ | |
573 | if (unlikely(cleanup || is_short || | |
de497f63 | 574 | req->req.actual == req->req.length)) { |
ceb80363 SL |
575 | |
576 | if (cleanup) { | |
577 | net2272_out_flush(ep); | |
578 | net2272_done(ep, req, -EOVERFLOW); | |
579 | } else | |
580 | net2272_done(ep, req, 0); | |
581 | ||
582 | /* re-initialize endpoint transfer registers | |
583 | * otherwise they may result in erroneous pre-validation | |
584 | * for subsequent control reads | |
585 | */ | |
586 | if (unlikely(ep->num == 0)) { | |
587 | net2272_ep_write(ep, EP_TRANSFER2, 0); | |
588 | net2272_ep_write(ep, EP_TRANSFER1, 0); | |
589 | net2272_ep_write(ep, EP_TRANSFER0, 0); | |
590 | } | |
591 | ||
592 | if (!list_empty(&ep->queue)) { | |
53f66686 CIK |
593 | int status; |
594 | ||
ceb80363 SL |
595 | req = list_entry(ep->queue.next, |
596 | struct net2272_request, queue); | |
597 | status = net2272_kick_dma(ep, req); | |
598 | if ((status < 0) && | |
599 | !(net2272_ep_read(ep, EP_STAT0) & (1 << BUFFER_EMPTY))) | |
600 | goto top; | |
601 | } | |
602 | return 1; | |
603 | } | |
604 | } while (!(net2272_ep_read(ep, EP_STAT0) & (1 << BUFFER_EMPTY))); | |
605 | ||
606 | return 0; | |
607 | } | |
608 | ||
609 | static void | |
610 | net2272_pio_advance(struct net2272_ep *ep) | |
611 | { | |
612 | struct net2272_request *req; | |
613 | ||
614 | if (unlikely(list_empty(&ep->queue))) | |
615 | return; | |
616 | ||
617 | req = list_entry(ep->queue.next, struct net2272_request, queue); | |
618 | (ep->is_in ? net2272_write_fifo : net2272_read_fifo)(ep, req); | |
619 | } | |
620 | ||
621 | /* returns 0 on success, else negative errno */ | |
622 | static int | |
623 | net2272_request_dma(struct net2272 *dev, unsigned ep, u32 buf, | |
624 | unsigned len, unsigned dir) | |
625 | { | |
626 | dev_vdbg(dev->dev, "request_dma ep %d buf %08x len %d dir %d\n", | |
627 | ep, buf, len, dir); | |
628 | ||
629 | /* The NET2272 only supports a single dma channel */ | |
630 | if (dev->dma_busy) | |
631 | return -EBUSY; | |
632 | /* | |
633 | * EP_TRANSFER (used to determine the number of bytes received | |
634 | * in an OUT transfer) is 24 bits wide; don't ask for more than that. | |
635 | */ | |
636 | if ((dir == 1) && (len > 0x1000000)) | |
637 | return -EINVAL; | |
638 | ||
639 | dev->dma_busy = 1; | |
640 | ||
641 | /* initialize platform's dma */ | |
2c93e790 | 642 | #ifdef CONFIG_USB_PCI |
ceb80363 SL |
643 | /* NET2272 addr, buffer addr, length, etc. */ |
644 | switch (dev->dev_id) { | |
645 | case PCI_DEVICE_ID_RDK1: | |
646 | /* Setup PLX 9054 DMA mode */ | |
647 | writel((1 << LOCAL_BUS_WIDTH) | | |
648 | (1 << TA_READY_INPUT_ENABLE) | | |
649 | (0 << LOCAL_BURST_ENABLE) | | |
650 | (1 << DONE_INTERRUPT_ENABLE) | | |
651 | (1 << LOCAL_ADDRESSING_MODE) | | |
652 | (1 << DEMAND_MODE) | | |
653 | (1 << DMA_EOT_ENABLE) | | |
654 | (1 << FAST_SLOW_TERMINATE_MODE_SELECT) | | |
655 | (1 << DMA_CHANNEL_INTERRUPT_SELECT), | |
656 | dev->rdk1.plx9054_base_addr + DMAMODE0); | |
657 | ||
658 | writel(0x100000, dev->rdk1.plx9054_base_addr + DMALADR0); | |
659 | writel(buf, dev->rdk1.plx9054_base_addr + DMAPADR0); | |
660 | writel(len, dev->rdk1.plx9054_base_addr + DMASIZ0); | |
661 | writel((dir << DIRECTION_OF_TRANSFER) | | |
662 | (1 << INTERRUPT_AFTER_TERMINAL_COUNT), | |
663 | dev->rdk1.plx9054_base_addr + DMADPR0); | |
664 | writel((1 << LOCAL_DMA_CHANNEL_0_INTERRUPT_ENABLE) | | |
665 | readl(dev->rdk1.plx9054_base_addr + INTCSR), | |
666 | dev->rdk1.plx9054_base_addr + INTCSR); | |
667 | ||
668 | break; | |
669 | } | |
670 | #endif | |
671 | ||
672 | net2272_write(dev, DMAREQ, | |
673 | (0 << DMA_BUFFER_VALID) | | |
674 | (1 << DMA_REQUEST_ENABLE) | | |
675 | (1 << DMA_CONTROL_DACK) | | |
676 | (dev->dma_eot_polarity << EOT_POLARITY) | | |
677 | (dev->dma_dack_polarity << DACK_POLARITY) | | |
678 | (dev->dma_dreq_polarity << DREQ_POLARITY) | | |
679 | ((ep >> 1) << DMA_ENDPOINT_SELECT)); | |
680 | ||
681 | (void) net2272_read(dev, SCRATCH); | |
682 | ||
683 | return 0; | |
684 | } | |
685 | ||
686 | static void | |
687 | net2272_start_dma(struct net2272 *dev) | |
688 | { | |
689 | /* start platform's dma controller */ | |
2c93e790 | 690 | #ifdef CONFIG_USB_PCI |
ceb80363 SL |
691 | switch (dev->dev_id) { |
692 | case PCI_DEVICE_ID_RDK1: | |
693 | writeb((1 << CHANNEL_ENABLE) | (1 << CHANNEL_START), | |
694 | dev->rdk1.plx9054_base_addr + DMACSR0); | |
695 | break; | |
696 | } | |
697 | #endif | |
698 | } | |
699 | ||
700 | /* returns 0 on success, else negative errno */ | |
701 | static int | |
702 | net2272_kick_dma(struct net2272_ep *ep, struct net2272_request *req) | |
703 | { | |
704 | unsigned size; | |
705 | u8 tmp; | |
706 | ||
707 | if (!use_dma || (ep->num < 1) || (ep->num > 2) || !ep->dma) | |
708 | return -EINVAL; | |
709 | ||
710 | /* don't use dma for odd-length transfers | |
711 | * otherwise, we'd need to deal with the last byte with pio | |
712 | */ | |
713 | if (req->req.length & 1) | |
714 | return -EINVAL; | |
715 | ||
7b30d19a FB |
716 | dev_vdbg(ep->dev->dev, "kick_dma %s req %p dma %08llx\n", |
717 | ep->ep.name, req, (unsigned long long) req->req.dma); | |
ceb80363 SL |
718 | |
719 | net2272_ep_write(ep, EP_RSPSET, 1 << ALT_NAK_OUT_PACKETS); | |
720 | ||
721 | /* The NET2272 can only use DMA on one endpoint at a time */ | |
722 | if (ep->dev->dma_busy) | |
723 | return -EBUSY; | |
724 | ||
725 | /* Make sure we only DMA an even number of bytes (we'll use | |
726 | * pio to complete the transfer) | |
727 | */ | |
728 | size = req->req.length; | |
729 | size &= ~1; | |
730 | ||
731 | /* device-to-host transfer */ | |
732 | if (ep->is_in) { | |
733 | /* initialize platform's dma controller */ | |
734 | if (net2272_request_dma(ep->dev, ep->num, req->req.dma, size, 0)) | |
735 | /* unable to obtain DMA channel; return error and use pio mode */ | |
736 | return -EBUSY; | |
737 | req->req.actual += size; | |
738 | ||
739 | /* host-to-device transfer */ | |
740 | } else { | |
741 | tmp = net2272_ep_read(ep, EP_STAT0); | |
742 | ||
743 | /* initialize platform's dma controller */ | |
744 | if (net2272_request_dma(ep->dev, ep->num, req->req.dma, size, 1)) | |
745 | /* unable to obtain DMA channel; return error and use pio mode */ | |
746 | return -EBUSY; | |
747 | ||
748 | if (!(tmp & (1 << BUFFER_EMPTY))) | |
749 | ep->not_empty = 1; | |
750 | else | |
751 | ep->not_empty = 0; | |
752 | ||
753 | ||
754 | /* allow the endpoint's buffer to fill */ | |
755 | net2272_ep_write(ep, EP_RSPCLR, 1 << ALT_NAK_OUT_PACKETS); | |
756 | ||
757 | /* this transfer completed and data's already in the fifo | |
758 | * return error so pio gets used. | |
759 | */ | |
760 | if (tmp & (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)) { | |
761 | ||
762 | /* deassert dreq */ | |
763 | net2272_write(ep->dev, DMAREQ, | |
764 | (0 << DMA_BUFFER_VALID) | | |
765 | (0 << DMA_REQUEST_ENABLE) | | |
766 | (1 << DMA_CONTROL_DACK) | | |
767 | (ep->dev->dma_eot_polarity << EOT_POLARITY) | | |
768 | (ep->dev->dma_dack_polarity << DACK_POLARITY) | | |
769 | (ep->dev->dma_dreq_polarity << DREQ_POLARITY) | | |
770 | ((ep->num >> 1) << DMA_ENDPOINT_SELECT)); | |
771 | ||
772 | return -EBUSY; | |
773 | } | |
774 | } | |
775 | ||
776 | /* Don't use per-packet interrupts: use dma interrupts only */ | |
777 | net2272_ep_write(ep, EP_IRQENB, 0); | |
778 | ||
779 | net2272_start_dma(ep->dev); | |
780 | ||
781 | return 0; | |
782 | } | |
783 | ||
784 | static void net2272_cancel_dma(struct net2272 *dev) | |
785 | { | |
2c93e790 | 786 | #ifdef CONFIG_USB_PCI |
ceb80363 SL |
787 | switch (dev->dev_id) { |
788 | case PCI_DEVICE_ID_RDK1: | |
789 | writeb(0, dev->rdk1.plx9054_base_addr + DMACSR0); | |
790 | writeb(1 << CHANNEL_ABORT, dev->rdk1.plx9054_base_addr + DMACSR0); | |
791 | while (!(readb(dev->rdk1.plx9054_base_addr + DMACSR0) & | |
792 | (1 << CHANNEL_DONE))) | |
793 | continue; /* wait for dma to stabalize */ | |
794 | ||
795 | /* dma abort generates an interrupt */ | |
796 | writeb(1 << CHANNEL_CLEAR_INTERRUPT, | |
797 | dev->rdk1.plx9054_base_addr + DMACSR0); | |
798 | break; | |
799 | } | |
800 | #endif | |
801 | ||
802 | dev->dma_busy = 0; | |
803 | } | |
804 | ||
805 | /*---------------------------------------------------------------------------*/ | |
806 | ||
807 | static int | |
808 | net2272_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) | |
809 | { | |
810 | struct net2272_request *req; | |
811 | struct net2272_ep *ep; | |
812 | struct net2272 *dev; | |
813 | unsigned long flags; | |
814 | int status = -1; | |
815 | u8 s; | |
816 | ||
817 | req = container_of(_req, struct net2272_request, req); | |
818 | if (!_req || !_req->complete || !_req->buf | |
819 | || !list_empty(&req->queue)) | |
820 | return -EINVAL; | |
821 | ep = container_of(_ep, struct net2272_ep, ep); | |
822 | if (!_ep || (!ep->desc && ep->num != 0)) | |
823 | return -EINVAL; | |
824 | dev = ep->dev; | |
825 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) | |
826 | return -ESHUTDOWN; | |
827 | ||
828 | /* set up dma mapping in case the caller didn't */ | |
af93f2c7 FB |
829 | if (use_dma && ep->dma) { |
830 | status = usb_gadget_map_request(&dev->gadget, _req, | |
831 | ep->is_in); | |
832 | if (status) | |
833 | return status; | |
ceb80363 SL |
834 | } |
835 | ||
7b30d19a | 836 | dev_vdbg(dev->dev, "%s queue req %p, len %d buf %p dma %08llx %s\n", |
ceb80363 | 837 | _ep->name, _req, _req->length, _req->buf, |
7b30d19a | 838 | (unsigned long long) _req->dma, _req->zero ? "zero" : "!zero"); |
ceb80363 SL |
839 | |
840 | spin_lock_irqsave(&dev->lock, flags); | |
841 | ||
842 | _req->status = -EINPROGRESS; | |
843 | _req->actual = 0; | |
844 | ||
845 | /* kickstart this i/o queue? */ | |
846 | if (list_empty(&ep->queue) && !ep->stopped) { | |
847 | /* maybe there's no control data, just status ack */ | |
848 | if (ep->num == 0 && _req->length == 0) { | |
849 | net2272_done(ep, req, 0); | |
850 | dev_vdbg(dev->dev, "%s status ack\n", ep->ep.name); | |
851 | goto done; | |
852 | } | |
853 | ||
854 | /* Return zlp, don't let it block subsequent packets */ | |
855 | s = net2272_ep_read(ep, EP_STAT0); | |
856 | if (s & (1 << BUFFER_EMPTY)) { | |
857 | /* Buffer is empty check for a blocking zlp, handle it */ | |
858 | if ((s & (1 << NAK_OUT_PACKETS)) && | |
859 | net2272_ep_read(ep, EP_STAT1) & (1 << LOCAL_OUT_ZLP)) { | |
860 | dev_dbg(dev->dev, "WARNING: returning ZLP short packet termination!\n"); | |
861 | /* | |
862 | * Request is going to terminate with a short packet ... | |
863 | * hope the client is ready for it! | |
864 | */ | |
865 | status = net2272_read_fifo(ep, req); | |
866 | /* clear short packet naking */ | |
867 | net2272_ep_write(ep, EP_STAT0, (1 << NAK_OUT_PACKETS)); | |
868 | goto done; | |
869 | } | |
870 | } | |
871 | ||
872 | /* try dma first */ | |
873 | status = net2272_kick_dma(ep, req); | |
874 | ||
875 | if (status < 0) { | |
876 | /* dma failed (most likely in use by another endpoint) | |
877 | * fallback to pio | |
878 | */ | |
879 | status = 0; | |
880 | ||
881 | if (ep->is_in) | |
882 | status = net2272_write_fifo(ep, req); | |
883 | else { | |
884 | s = net2272_ep_read(ep, EP_STAT0); | |
885 | if ((s & (1 << BUFFER_EMPTY)) == 0) | |
886 | status = net2272_read_fifo(ep, req); | |
887 | } | |
888 | ||
889 | if (unlikely(status != 0)) { | |
890 | if (status > 0) | |
891 | status = 0; | |
892 | req = NULL; | |
893 | } | |
894 | } | |
895 | } | |
69147121 | 896 | if (likely(req)) |
ceb80363 SL |
897 | list_add_tail(&req->queue, &ep->queue); |
898 | ||
899 | if (likely(!list_empty(&ep->queue))) | |
900 | net2272_ep_write(ep, EP_RSPCLR, 1 << ALT_NAK_OUT_PACKETS); | |
901 | done: | |
902 | spin_unlock_irqrestore(&dev->lock, flags); | |
903 | ||
904 | return 0; | |
905 | } | |
906 | ||
907 | /* dequeue ALL requests */ | |
908 | static void | |
909 | net2272_dequeue_all(struct net2272_ep *ep) | |
910 | { | |
911 | struct net2272_request *req; | |
912 | ||
913 | /* called with spinlock held */ | |
914 | ep->stopped = 1; | |
915 | ||
916 | while (!list_empty(&ep->queue)) { | |
917 | req = list_entry(ep->queue.next, | |
918 | struct net2272_request, | |
919 | queue); | |
920 | net2272_done(ep, req, -ESHUTDOWN); | |
921 | } | |
922 | } | |
923 | ||
924 | /* dequeue JUST ONE request */ | |
925 | static int | |
926 | net2272_dequeue(struct usb_ep *_ep, struct usb_request *_req) | |
927 | { | |
928 | struct net2272_ep *ep; | |
e6169a87 | 929 | struct net2272_request *req = NULL, *iter; |
ceb80363 SL |
930 | unsigned long flags; |
931 | int stopped; | |
932 | ||
933 | ep = container_of(_ep, struct net2272_ep, ep); | |
934 | if (!_ep || (!ep->desc && ep->num != 0) || !_req) | |
935 | return -EINVAL; | |
936 | ||
937 | spin_lock_irqsave(&ep->dev->lock, flags); | |
938 | stopped = ep->stopped; | |
939 | ep->stopped = 1; | |
940 | ||
941 | /* make sure it's still queued on this endpoint */ | |
e6169a87 JK |
942 | list_for_each_entry(iter, &ep->queue, queue) { |
943 | if (&iter->req != _req) | |
944 | continue; | |
945 | req = iter; | |
946 | break; | |
ceb80363 | 947 | } |
e6169a87 | 948 | if (!req) { |
091dacc3 | 949 | ep->stopped = stopped; |
ceb80363 SL |
950 | spin_unlock_irqrestore(&ep->dev->lock, flags); |
951 | return -EINVAL; | |
952 | } | |
953 | ||
954 | /* queue head may be partially complete */ | |
955 | if (ep->queue.next == &req->queue) { | |
956 | dev_dbg(ep->dev->dev, "unlink (%s) pio\n", _ep->name); | |
957 | net2272_done(ep, req, -ECONNRESET); | |
958 | } | |
ceb80363 SL |
959 | ep->stopped = stopped; |
960 | ||
961 | spin_unlock_irqrestore(&ep->dev->lock, flags); | |
962 | return 0; | |
963 | } | |
964 | ||
965 | /*---------------------------------------------------------------------------*/ | |
966 | ||
967 | static int | |
968 | net2272_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged) | |
969 | { | |
970 | struct net2272_ep *ep; | |
971 | unsigned long flags; | |
972 | int ret = 0; | |
973 | ||
974 | ep = container_of(_ep, struct net2272_ep, ep); | |
975 | if (!_ep || (!ep->desc && ep->num != 0)) | |
976 | return -EINVAL; | |
977 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) | |
978 | return -ESHUTDOWN; | |
979 | if (ep->desc /* not ep0 */ && usb_endpoint_xfer_isoc(ep->desc)) | |
980 | return -EINVAL; | |
981 | ||
982 | spin_lock_irqsave(&ep->dev->lock, flags); | |
983 | if (!list_empty(&ep->queue)) | |
984 | ret = -EAGAIN; | |
985 | else if (ep->is_in && value && net2272_fifo_status(_ep) != 0) | |
986 | ret = -EAGAIN; | |
987 | else { | |
988 | dev_vdbg(ep->dev->dev, "%s %s %s\n", _ep->name, | |
989 | value ? "set" : "clear", | |
990 | wedged ? "wedge" : "halt"); | |
991 | /* set/clear */ | |
992 | if (value) { | |
993 | if (ep->num == 0) | |
994 | ep->dev->protocol_stall = 1; | |
995 | else | |
996 | set_halt(ep); | |
997 | if (wedged) | |
998 | ep->wedged = 1; | |
999 | } else { | |
1000 | clear_halt(ep); | |
1001 | ep->wedged = 0; | |
1002 | } | |
1003 | } | |
1004 | spin_unlock_irqrestore(&ep->dev->lock, flags); | |
1005 | ||
1006 | return ret; | |
1007 | } | |
1008 | ||
1009 | static int | |
1010 | net2272_set_halt(struct usb_ep *_ep, int value) | |
1011 | { | |
1012 | return net2272_set_halt_and_wedge(_ep, value, 0); | |
1013 | } | |
1014 | ||
1015 | static int | |
1016 | net2272_set_wedge(struct usb_ep *_ep) | |
1017 | { | |
1018 | if (!_ep || _ep->name == ep0name) | |
1019 | return -EINVAL; | |
1020 | return net2272_set_halt_and_wedge(_ep, 1, 1); | |
1021 | } | |
1022 | ||
1023 | static int | |
1024 | net2272_fifo_status(struct usb_ep *_ep) | |
1025 | { | |
1026 | struct net2272_ep *ep; | |
1027 | u16 avail; | |
1028 | ||
1029 | ep = container_of(_ep, struct net2272_ep, ep); | |
1030 | if (!_ep || (!ep->desc && ep->num != 0)) | |
1031 | return -ENODEV; | |
1032 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1033 | return -ESHUTDOWN; | |
1034 | ||
1035 | avail = net2272_ep_read(ep, EP_AVAIL1) << 8; | |
1036 | avail |= net2272_ep_read(ep, EP_AVAIL0); | |
1037 | if (avail > ep->fifo_size) | |
1038 | return -EOVERFLOW; | |
1039 | if (ep->is_in) | |
1040 | avail = ep->fifo_size - avail; | |
1041 | return avail; | |
1042 | } | |
1043 | ||
1044 | static void | |
1045 | net2272_fifo_flush(struct usb_ep *_ep) | |
1046 | { | |
1047 | struct net2272_ep *ep; | |
1048 | ||
1049 | ep = container_of(_ep, struct net2272_ep, ep); | |
1050 | if (!_ep || (!ep->desc && ep->num != 0)) | |
1051 | return; | |
1052 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1053 | return; | |
1054 | ||
1055 | net2272_ep_write(ep, EP_STAT1, 1 << BUFFER_FLUSH); | |
1056 | } | |
1057 | ||
977ac789 | 1058 | static const struct usb_ep_ops net2272_ep_ops = { |
ceb80363 SL |
1059 | .enable = net2272_enable, |
1060 | .disable = net2272_disable, | |
1061 | ||
1062 | .alloc_request = net2272_alloc_request, | |
1063 | .free_request = net2272_free_request, | |
1064 | ||
1065 | .queue = net2272_queue, | |
1066 | .dequeue = net2272_dequeue, | |
1067 | ||
1068 | .set_halt = net2272_set_halt, | |
1069 | .set_wedge = net2272_set_wedge, | |
1070 | .fifo_status = net2272_fifo_status, | |
1071 | .fifo_flush = net2272_fifo_flush, | |
1072 | }; | |
1073 | ||
1074 | /*---------------------------------------------------------------------------*/ | |
1075 | ||
1076 | static int | |
1077 | net2272_get_frame(struct usb_gadget *_gadget) | |
1078 | { | |
1079 | struct net2272 *dev; | |
1080 | unsigned long flags; | |
1081 | u16 ret; | |
1082 | ||
1083 | if (!_gadget) | |
1084 | return -ENODEV; | |
1085 | dev = container_of(_gadget, struct net2272, gadget); | |
1086 | spin_lock_irqsave(&dev->lock, flags); | |
1087 | ||
1088 | ret = net2272_read(dev, FRAME1) << 8; | |
1089 | ret |= net2272_read(dev, FRAME0); | |
1090 | ||
1091 | spin_unlock_irqrestore(&dev->lock, flags); | |
1092 | return ret; | |
1093 | } | |
1094 | ||
1095 | static int | |
1096 | net2272_wakeup(struct usb_gadget *_gadget) | |
1097 | { | |
1098 | struct net2272 *dev; | |
1099 | u8 tmp; | |
1100 | unsigned long flags; | |
1101 | ||
1102 | if (!_gadget) | |
1103 | return 0; | |
1104 | dev = container_of(_gadget, struct net2272, gadget); | |
1105 | ||
1106 | spin_lock_irqsave(&dev->lock, flags); | |
1107 | tmp = net2272_read(dev, USBCTL0); | |
1108 | if (tmp & (1 << IO_WAKEUP_ENABLE)) | |
1109 | net2272_write(dev, USBCTL1, (1 << GENERATE_RESUME)); | |
1110 | ||
1111 | spin_unlock_irqrestore(&dev->lock, flags); | |
1112 | ||
1113 | return 0; | |
1114 | } | |
1115 | ||
1116 | static int | |
1117 | net2272_set_selfpowered(struct usb_gadget *_gadget, int value) | |
1118 | { | |
ceb80363 SL |
1119 | if (!_gadget) |
1120 | return -ENODEV; | |
ceb80363 | 1121 | |
d4a1c479 | 1122 | _gadget->is_selfpowered = (value != 0); |
ceb80363 SL |
1123 | |
1124 | return 0; | |
1125 | } | |
1126 | ||
1127 | static int | |
1128 | net2272_pullup(struct usb_gadget *_gadget, int is_on) | |
1129 | { | |
1130 | struct net2272 *dev; | |
1131 | u8 tmp; | |
1132 | unsigned long flags; | |
1133 | ||
1134 | if (!_gadget) | |
1135 | return -ENODEV; | |
1136 | dev = container_of(_gadget, struct net2272, gadget); | |
1137 | ||
1138 | spin_lock_irqsave(&dev->lock, flags); | |
1139 | tmp = net2272_read(dev, USBCTL0); | |
1140 | dev->softconnect = (is_on != 0); | |
1141 | if (is_on) | |
1142 | tmp |= (1 << USB_DETECT_ENABLE); | |
1143 | else | |
1144 | tmp &= ~(1 << USB_DETECT_ENABLE); | |
1145 | net2272_write(dev, USBCTL0, tmp); | |
1146 | spin_unlock_irqrestore(&dev->lock, flags); | |
1147 | ||
1148 | return 0; | |
1149 | } | |
1150 | ||
96f8db6a FB |
1151 | static int net2272_start(struct usb_gadget *_gadget, |
1152 | struct usb_gadget_driver *driver); | |
22835b80 | 1153 | static int net2272_stop(struct usb_gadget *_gadget); |
87191ca9 | 1154 | static void net2272_async_callbacks(struct usb_gadget *_gadget, bool enable); |
0f91349b | 1155 | |
ceb80363 | 1156 | static const struct usb_gadget_ops net2272_ops = { |
96f8db6a FB |
1157 | .get_frame = net2272_get_frame, |
1158 | .wakeup = net2272_wakeup, | |
ceb80363 | 1159 | .set_selfpowered = net2272_set_selfpowered, |
96f8db6a FB |
1160 | .pullup = net2272_pullup, |
1161 | .udc_start = net2272_start, | |
1162 | .udc_stop = net2272_stop, | |
87191ca9 | 1163 | .udc_async_callbacks = net2272_async_callbacks, |
ceb80363 SL |
1164 | }; |
1165 | ||
1166 | /*---------------------------------------------------------------------------*/ | |
1167 | ||
1168 | static ssize_t | |
ce26bd23 | 1169 | registers_show(struct device *_dev, struct device_attribute *attr, char *buf) |
ceb80363 SL |
1170 | { |
1171 | struct net2272 *dev; | |
1172 | char *next; | |
1173 | unsigned size, t; | |
1174 | unsigned long flags; | |
1175 | u8 t1, t2; | |
1176 | int i; | |
1177 | const char *s; | |
1178 | ||
1179 | dev = dev_get_drvdata(_dev); | |
1180 | next = buf; | |
1181 | size = PAGE_SIZE; | |
1182 | spin_lock_irqsave(&dev->lock, flags); | |
1183 | ||
ceb80363 SL |
1184 | /* Main Control Registers */ |
1185 | t = scnprintf(next, size, "%s version %s," | |
1186 | "chiprev %02x, locctl %02x\n" | |
1187 | "irqenb0 %02x irqenb1 %02x " | |
1188 | "irqstat0 %02x irqstat1 %02x\n", | |
1189 | driver_name, driver_vers, dev->chiprev, | |
1190 | net2272_read(dev, LOCCTL), | |
1191 | net2272_read(dev, IRQENB0), | |
1192 | net2272_read(dev, IRQENB1), | |
1193 | net2272_read(dev, IRQSTAT0), | |
1194 | net2272_read(dev, IRQSTAT1)); | |
1195 | size -= t; | |
1196 | next += t; | |
1197 | ||
1198 | /* DMA */ | |
1199 | t1 = net2272_read(dev, DMAREQ); | |
1200 | t = scnprintf(next, size, "\ndmareq %02x: %s %s%s%s%s\n", | |
1201 | t1, ep_name[(t1 & 0x01) + 1], | |
1202 | t1 & (1 << DMA_CONTROL_DACK) ? "dack " : "", | |
1203 | t1 & (1 << DMA_REQUEST_ENABLE) ? "reqenb " : "", | |
1204 | t1 & (1 << DMA_REQUEST) ? "req " : "", | |
1205 | t1 & (1 << DMA_BUFFER_VALID) ? "valid " : ""); | |
1206 | size -= t; | |
1207 | next += t; | |
1208 | ||
1209 | /* USB Control Registers */ | |
1210 | t1 = net2272_read(dev, USBCTL1); | |
1211 | if (t1 & (1 << VBUS_PIN)) { | |
1212 | if (t1 & (1 << USB_HIGH_SPEED)) | |
1213 | s = "high speed"; | |
1214 | else if (dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1215 | s = "powered"; | |
1216 | else | |
1217 | s = "full speed"; | |
1218 | } else | |
1219 | s = "not attached"; | |
1220 | t = scnprintf(next, size, | |
1221 | "usbctl0 %02x usbctl1 %02x addr 0x%02x (%s)\n", | |
1222 | net2272_read(dev, USBCTL0), t1, | |
1223 | net2272_read(dev, OURADDR), s); | |
1224 | size -= t; | |
1225 | next += t; | |
1226 | ||
1227 | /* Endpoint Registers */ | |
1228 | for (i = 0; i < 4; ++i) { | |
1229 | struct net2272_ep *ep; | |
1230 | ||
1231 | ep = &dev->ep[i]; | |
1232 | if (i && !ep->desc) | |
1233 | continue; | |
1234 | ||
1235 | t1 = net2272_ep_read(ep, EP_CFG); | |
1236 | t2 = net2272_ep_read(ep, EP_RSPSET); | |
1237 | t = scnprintf(next, size, | |
1238 | "\n%s\tcfg %02x rsp (%02x) %s%s%s%s%s%s%s%s" | |
1239 | "irqenb %02x\n", | |
1240 | ep->ep.name, t1, t2, | |
1241 | (t2 & (1 << ALT_NAK_OUT_PACKETS)) ? "NAK " : "", | |
1242 | (t2 & (1 << HIDE_STATUS_PHASE)) ? "hide " : "", | |
1243 | (t2 & (1 << AUTOVALIDATE)) ? "auto " : "", | |
1244 | (t2 & (1 << INTERRUPT_MODE)) ? "interrupt " : "", | |
1245 | (t2 & (1 << CONTROL_STATUS_PHASE_HANDSHAKE)) ? "status " : "", | |
1246 | (t2 & (1 << NAK_OUT_PACKETS_MODE)) ? "NAKmode " : "", | |
1247 | (t2 & (1 << ENDPOINT_TOGGLE)) ? "DATA1 " : "DATA0 ", | |
1248 | (t2 & (1 << ENDPOINT_HALT)) ? "HALT " : "", | |
1249 | net2272_ep_read(ep, EP_IRQENB)); | |
1250 | size -= t; | |
1251 | next += t; | |
1252 | ||
1253 | t = scnprintf(next, size, | |
1254 | "\tstat0 %02x stat1 %02x avail %04x " | |
1255 | "(ep%d%s-%s)%s\n", | |
1256 | net2272_ep_read(ep, EP_STAT0), | |
1257 | net2272_ep_read(ep, EP_STAT1), | |
1258 | (net2272_ep_read(ep, EP_AVAIL1) << 8) | net2272_ep_read(ep, EP_AVAIL0), | |
1259 | t1 & 0x0f, | |
1260 | ep->is_in ? "in" : "out", | |
1261 | type_string(t1 >> 5), | |
1262 | ep->stopped ? "*" : ""); | |
1263 | size -= t; | |
1264 | next += t; | |
1265 | ||
1266 | t = scnprintf(next, size, | |
1267 | "\tep_transfer %06x\n", | |
1268 | ((net2272_ep_read(ep, EP_TRANSFER2) & 0xff) << 16) | | |
1269 | ((net2272_ep_read(ep, EP_TRANSFER1) & 0xff) << 8) | | |
1270 | ((net2272_ep_read(ep, EP_TRANSFER0) & 0xff))); | |
1271 | size -= t; | |
1272 | next += t; | |
1273 | ||
1274 | t1 = net2272_ep_read(ep, EP_BUFF_STATES) & 0x03; | |
1275 | t2 = (net2272_ep_read(ep, EP_BUFF_STATES) >> 2) & 0x03; | |
1276 | t = scnprintf(next, size, | |
1277 | "\tbuf-a %s buf-b %s\n", | |
1278 | buf_state_string(t1), | |
1279 | buf_state_string(t2)); | |
1280 | size -= t; | |
1281 | next += t; | |
1282 | } | |
1283 | ||
1284 | spin_unlock_irqrestore(&dev->lock, flags); | |
1285 | ||
1286 | return PAGE_SIZE - size; | |
1287 | } | |
ce26bd23 | 1288 | static DEVICE_ATTR_RO(registers); |
ceb80363 SL |
1289 | |
1290 | /*---------------------------------------------------------------------------*/ | |
1291 | ||
1292 | static void | |
1293 | net2272_set_fifo_mode(struct net2272 *dev, int mode) | |
1294 | { | |
1295 | u8 tmp; | |
1296 | ||
1297 | tmp = net2272_read(dev, LOCCTL) & 0x3f; | |
1298 | tmp |= (mode << 6); | |
1299 | net2272_write(dev, LOCCTL, tmp); | |
1300 | ||
1301 | INIT_LIST_HEAD(&dev->gadget.ep_list); | |
1302 | ||
1303 | /* always ep-a, ep-c ... maybe not ep-b */ | |
1304 | list_add_tail(&dev->ep[1].ep.ep_list, &dev->gadget.ep_list); | |
1305 | ||
1306 | switch (mode) { | |
1307 | case 0: | |
1308 | list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list); | |
1309 | dev->ep[1].fifo_size = dev->ep[2].fifo_size = 512; | |
1310 | break; | |
1311 | case 1: | |
1312 | list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list); | |
1313 | dev->ep[1].fifo_size = 1024; | |
1314 | dev->ep[2].fifo_size = 512; | |
1315 | break; | |
1316 | case 2: | |
1317 | list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list); | |
1318 | dev->ep[1].fifo_size = dev->ep[2].fifo_size = 1024; | |
1319 | break; | |
1320 | case 3: | |
1321 | dev->ep[1].fifo_size = 1024; | |
1322 | break; | |
1323 | } | |
1324 | ||
1325 | /* ep-c is always 2 512 byte buffers */ | |
1326 | list_add_tail(&dev->ep[3].ep.ep_list, &dev->gadget.ep_list); | |
1327 | dev->ep[3].fifo_size = 512; | |
1328 | } | |
1329 | ||
1330 | /*---------------------------------------------------------------------------*/ | |
1331 | ||
ceb80363 SL |
1332 | static void |
1333 | net2272_usb_reset(struct net2272 *dev) | |
1334 | { | |
1335 | dev->gadget.speed = USB_SPEED_UNKNOWN; | |
1336 | ||
1337 | net2272_cancel_dma(dev); | |
1338 | ||
1339 | net2272_write(dev, IRQENB0, 0); | |
1340 | net2272_write(dev, IRQENB1, 0); | |
1341 | ||
1342 | /* clear irq state */ | |
1343 | net2272_write(dev, IRQSTAT0, 0xff); | |
1344 | net2272_write(dev, IRQSTAT1, ~(1 << SUSPEND_REQUEST_INTERRUPT)); | |
1345 | ||
1346 | net2272_write(dev, DMAREQ, | |
1347 | (0 << DMA_BUFFER_VALID) | | |
1348 | (0 << DMA_REQUEST_ENABLE) | | |
1349 | (1 << DMA_CONTROL_DACK) | | |
1350 | (dev->dma_eot_polarity << EOT_POLARITY) | | |
1351 | (dev->dma_dack_polarity << DACK_POLARITY) | | |
1352 | (dev->dma_dreq_polarity << DREQ_POLARITY) | | |
1353 | ((dma_ep >> 1) << DMA_ENDPOINT_SELECT)); | |
1354 | ||
1355 | net2272_cancel_dma(dev); | |
1356 | net2272_set_fifo_mode(dev, (fifo_mode <= 3) ? fifo_mode : 0); | |
1357 | ||
1358 | /* Set the NET2272 ep fifo data width to 16-bit mode and for correct byte swapping | |
1359 | * note that the higher level gadget drivers are expected to convert data to little endian. | |
1360 | * Enable byte swap for your local bus/cpu if needed by setting BYTE_SWAP in LOCCTL here | |
1361 | */ | |
1362 | net2272_write(dev, LOCCTL, net2272_read(dev, LOCCTL) | (1 << DATA_WIDTH)); | |
1363 | net2272_write(dev, LOCCTL1, (dma_mode << DMA_MODE)); | |
1364 | } | |
1365 | ||
1366 | static void | |
1367 | net2272_usb_reinit(struct net2272 *dev) | |
1368 | { | |
1369 | int i; | |
1370 | ||
1371 | /* basic endpoint init */ | |
1372 | for (i = 0; i < 4; ++i) { | |
1373 | struct net2272_ep *ep = &dev->ep[i]; | |
1374 | ||
1375 | ep->ep.name = ep_name[i]; | |
1376 | ep->dev = dev; | |
1377 | ep->num = i; | |
1378 | ep->not_empty = 0; | |
1379 | ||
1380 | if (use_dma && ep->num == dma_ep) | |
1381 | ep->dma = 1; | |
1382 | ||
1383 | if (i > 0 && i <= 3) | |
1384 | ep->fifo_size = 512; | |
1385 | else | |
1386 | ep->fifo_size = 64; | |
1387 | net2272_ep_reset(ep); | |
f95aec51 RB |
1388 | |
1389 | if (i == 0) { | |
1390 | ep->ep.caps.type_control = true; | |
1391 | } else { | |
1392 | ep->ep.caps.type_iso = true; | |
1393 | ep->ep.caps.type_bulk = true; | |
1394 | ep->ep.caps.type_int = true; | |
1395 | } | |
1396 | ||
1397 | ep->ep.caps.dir_in = true; | |
1398 | ep->ep.caps.dir_out = true; | |
ceb80363 | 1399 | } |
e117e742 | 1400 | usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 64); |
ceb80363 SL |
1401 | |
1402 | dev->gadget.ep0 = &dev->ep[0].ep; | |
1403 | dev->ep[0].stopped = 0; | |
1404 | INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); | |
1405 | } | |
1406 | ||
1407 | static void | |
1408 | net2272_ep0_start(struct net2272 *dev) | |
1409 | { | |
1410 | struct net2272_ep *ep0 = &dev->ep[0]; | |
1411 | ||
1412 | net2272_ep_write(ep0, EP_RSPSET, | |
1413 | (1 << NAK_OUT_PACKETS_MODE) | | |
1414 | (1 << ALT_NAK_OUT_PACKETS)); | |
1415 | net2272_ep_write(ep0, EP_RSPCLR, | |
1416 | (1 << HIDE_STATUS_PHASE) | | |
1417 | (1 << CONTROL_STATUS_PHASE_HANDSHAKE)); | |
1418 | net2272_write(dev, USBCTL0, | |
1419 | (dev->softconnect << USB_DETECT_ENABLE) | | |
1420 | (1 << USB_ROOT_PORT_WAKEUP_ENABLE) | | |
1421 | (1 << IO_WAKEUP_ENABLE)); | |
1422 | net2272_write(dev, IRQENB0, | |
1423 | (1 << SETUP_PACKET_INTERRUPT_ENABLE) | | |
1424 | (1 << ENDPOINT_0_INTERRUPT_ENABLE) | | |
1425 | (1 << DMA_DONE_INTERRUPT_ENABLE)); | |
1426 | net2272_write(dev, IRQENB1, | |
1427 | (1 << VBUS_INTERRUPT_ENABLE) | | |
1428 | (1 << ROOT_PORT_RESET_INTERRUPT_ENABLE) | | |
1429 | (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE)); | |
1430 | } | |
1431 | ||
1432 | /* when a driver is successfully registered, it will receive | |
1433 | * control requests including set_configuration(), which enables | |
1434 | * non-control requests. then usb traffic follows until a | |
1435 | * disconnect is reported. then a host may connect again, or | |
1436 | * the driver might get unbound. | |
1437 | */ | |
96f8db6a FB |
1438 | static int net2272_start(struct usb_gadget *_gadget, |
1439 | struct usb_gadget_driver *driver) | |
ceb80363 | 1440 | { |
96f8db6a | 1441 | struct net2272 *dev; |
ceb80363 SL |
1442 | unsigned i; |
1443 | ||
a6c7c1c4 | 1444 | if (!driver || !driver->setup || |
7177aed4 | 1445 | driver->max_speed != USB_SPEED_HIGH) |
ceb80363 | 1446 | return -EINVAL; |
96f8db6a FB |
1447 | |
1448 | dev = container_of(_gadget, struct net2272, gadget); | |
ceb80363 SL |
1449 | |
1450 | for (i = 0; i < 4; ++i) | |
1451 | dev->ep[i].irqs = 0; | |
1452 | /* hook up the driver ... */ | |
1453 | dev->softconnect = 1; | |
ceb80363 | 1454 | dev->driver = driver; |
ceb80363 SL |
1455 | |
1456 | /* ... then enable host detection and ep0; and we're ready | |
1457 | * for set_configuration as well as eventual disconnect. | |
1458 | */ | |
1459 | net2272_ep0_start(dev); | |
1460 | ||
ceb80363 SL |
1461 | return 0; |
1462 | } | |
ceb80363 SL |
1463 | |
1464 | static void | |
1465 | stop_activity(struct net2272 *dev, struct usb_gadget_driver *driver) | |
1466 | { | |
1467 | int i; | |
1468 | ||
1469 | /* don't disconnect if it's not connected */ | |
1470 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1471 | driver = NULL; | |
1472 | ||
1473 | /* stop hardware; prevent new request submissions; | |
1474 | * and kill any outstanding requests. | |
1475 | */ | |
1476 | net2272_usb_reset(dev); | |
1477 | for (i = 0; i < 4; ++i) | |
1478 | net2272_dequeue_all(&dev->ep[i]); | |
1479 | ||
699412d9 | 1480 | /* report disconnect; the driver is already quiesced */ |
87191ca9 | 1481 | if (dev->async_callbacks && driver) { |
699412d9 FB |
1482 | spin_unlock(&dev->lock); |
1483 | driver->disconnect(&dev->gadget); | |
1484 | spin_lock(&dev->lock); | |
1485 | } | |
1486 | ||
ceb80363 SL |
1487 | net2272_usb_reinit(dev); |
1488 | } | |
1489 | ||
22835b80 | 1490 | static int net2272_stop(struct usb_gadget *_gadget) |
ceb80363 | 1491 | { |
96f8db6a | 1492 | struct net2272 *dev; |
ceb80363 SL |
1493 | unsigned long flags; |
1494 | ||
96f8db6a | 1495 | dev = container_of(_gadget, struct net2272, gadget); |
ceb80363 SL |
1496 | |
1497 | spin_lock_irqsave(&dev->lock, flags); | |
5baca5cf | 1498 | stop_activity(dev, NULL); |
ceb80363 SL |
1499 | spin_unlock_irqrestore(&dev->lock, flags); |
1500 | ||
ceb80363 SL |
1501 | dev->driver = NULL; |
1502 | ||
ceb80363 SL |
1503 | return 0; |
1504 | } | |
ceb80363 | 1505 | |
87191ca9 AS |
1506 | static void net2272_async_callbacks(struct usb_gadget *_gadget, bool enable) |
1507 | { | |
1508 | struct net2272 *dev = container_of(_gadget, struct net2272, gadget); | |
1509 | ||
1510 | spin_lock_irq(&dev->lock); | |
1511 | dev->async_callbacks = enable; | |
1512 | spin_unlock_irq(&dev->lock); | |
1513 | } | |
1514 | ||
ceb80363 SL |
1515 | /*---------------------------------------------------------------------------*/ |
1516 | /* handle ep-a/ep-b dma completions */ | |
1517 | static void | |
1518 | net2272_handle_dma(struct net2272_ep *ep) | |
1519 | { | |
1520 | struct net2272_request *req; | |
1521 | unsigned len; | |
1522 | int status; | |
1523 | ||
1524 | if (!list_empty(&ep->queue)) | |
1525 | req = list_entry(ep->queue.next, | |
1526 | struct net2272_request, queue); | |
1527 | else | |
1528 | req = NULL; | |
1529 | ||
1530 | dev_vdbg(ep->dev->dev, "handle_dma %s req %p\n", ep->ep.name, req); | |
1531 | ||
1532 | /* Ensure DREQ is de-asserted */ | |
1533 | net2272_write(ep->dev, DMAREQ, | |
1534 | (0 << DMA_BUFFER_VALID) | |
1535 | | (0 << DMA_REQUEST_ENABLE) | |
1536 | | (1 << DMA_CONTROL_DACK) | |
1537 | | (ep->dev->dma_eot_polarity << EOT_POLARITY) | |
1538 | | (ep->dev->dma_dack_polarity << DACK_POLARITY) | |
1539 | | (ep->dev->dma_dreq_polarity << DREQ_POLARITY) | |
69147121 | 1540 | | (ep->dma << DMA_ENDPOINT_SELECT)); |
ceb80363 SL |
1541 | |
1542 | ep->dev->dma_busy = 0; | |
1543 | ||
1544 | net2272_ep_write(ep, EP_IRQENB, | |
1545 | (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE) | |
1546 | | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE) | |
1547 | | net2272_ep_read(ep, EP_IRQENB)); | |
1548 | ||
1549 | /* device-to-host transfer completed */ | |
1550 | if (ep->is_in) { | |
1551 | /* validate a short packet or zlp if necessary */ | |
1552 | if ((req->req.length % ep->ep.maxpacket != 0) || | |
1553 | req->req.zero) | |
1554 | set_fifo_bytecount(ep, 0); | |
1555 | ||
1556 | net2272_done(ep, req, 0); | |
1557 | if (!list_empty(&ep->queue)) { | |
1558 | req = list_entry(ep->queue.next, | |
1559 | struct net2272_request, queue); | |
1560 | status = net2272_kick_dma(ep, req); | |
1561 | if (status < 0) | |
1562 | net2272_pio_advance(ep); | |
1563 | } | |
1564 | ||
1565 | /* host-to-device transfer completed */ | |
1566 | } else { | |
1567 | /* terminated with a short packet? */ | |
1568 | if (net2272_read(ep->dev, IRQSTAT0) & | |
1569 | (1 << DMA_DONE_INTERRUPT)) { | |
1570 | /* abort system dma */ | |
1571 | net2272_cancel_dma(ep->dev); | |
1572 | } | |
1573 | ||
1574 | /* EP_TRANSFER will contain the number of bytes | |
1575 | * actually received. | |
1576 | * NOTE: There is no overflow detection on EP_TRANSFER: | |
1577 | * We can't deal with transfers larger than 2^24 bytes! | |
1578 | */ | |
1579 | len = (net2272_ep_read(ep, EP_TRANSFER2) << 16) | |
1580 | | (net2272_ep_read(ep, EP_TRANSFER1) << 8) | |
1581 | | (net2272_ep_read(ep, EP_TRANSFER0)); | |
1582 | ||
1583 | if (ep->not_empty) | |
1584 | len += 4; | |
1585 | ||
1586 | req->req.actual += len; | |
1587 | ||
1588 | /* get any remaining data */ | |
1589 | net2272_pio_advance(ep); | |
1590 | } | |
1591 | } | |
1592 | ||
1593 | /*---------------------------------------------------------------------------*/ | |
1594 | ||
1595 | static void | |
1596 | net2272_handle_ep(struct net2272_ep *ep) | |
1597 | { | |
1598 | struct net2272_request *req; | |
1599 | u8 stat0, stat1; | |
1600 | ||
1601 | if (!list_empty(&ep->queue)) | |
1602 | req = list_entry(ep->queue.next, | |
1603 | struct net2272_request, queue); | |
1604 | else | |
1605 | req = NULL; | |
1606 | ||
1607 | /* ack all, and handle what we care about */ | |
1608 | stat0 = net2272_ep_read(ep, EP_STAT0); | |
1609 | stat1 = net2272_ep_read(ep, EP_STAT1); | |
1610 | ep->irqs++; | |
1611 | ||
1612 | dev_vdbg(ep->dev->dev, "%s ack ep_stat0 %02x, ep_stat1 %02x, req %p\n", | |
69147121 | 1613 | ep->ep.name, stat0, stat1, req ? &req->req : NULL); |
ceb80363 SL |
1614 | |
1615 | net2272_ep_write(ep, EP_STAT0, stat0 & | |
1616 | ~((1 << NAK_OUT_PACKETS) | |
1617 | | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT))); | |
1618 | net2272_ep_write(ep, EP_STAT1, stat1); | |
1619 | ||
1620 | /* data packet(s) received (in the fifo, OUT) | |
1621 | * direction must be validated, otherwise control read status phase | |
1622 | * could be interpreted as a valid packet | |
1623 | */ | |
1624 | if (!ep->is_in && (stat0 & (1 << DATA_PACKET_RECEIVED_INTERRUPT))) | |
1625 | net2272_pio_advance(ep); | |
1626 | /* data packet(s) transmitted (IN) */ | |
1627 | else if (stat0 & (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)) | |
1628 | net2272_pio_advance(ep); | |
1629 | } | |
1630 | ||
1631 | static struct net2272_ep * | |
1632 | net2272_get_ep_by_addr(struct net2272 *dev, u16 wIndex) | |
1633 | { | |
1634 | struct net2272_ep *ep; | |
1635 | ||
1636 | if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0) | |
1637 | return &dev->ep[0]; | |
1638 | ||
1639 | list_for_each_entry(ep, &dev->gadget.ep_list, ep.ep_list) { | |
1640 | u8 bEndpointAddress; | |
1641 | ||
1642 | if (!ep->desc) | |
1643 | continue; | |
1644 | bEndpointAddress = ep->desc->bEndpointAddress; | |
1645 | if ((wIndex ^ bEndpointAddress) & USB_DIR_IN) | |
1646 | continue; | |
1647 | if ((wIndex & 0x0f) == (bEndpointAddress & 0x0f)) | |
1648 | return ep; | |
1649 | } | |
1650 | return NULL; | |
1651 | } | |
1652 | ||
1653 | /* | |
1654 | * USB Test Packet: | |
1655 | * JKJKJKJK * 9 | |
1656 | * JJKKJJKK * 8 | |
1657 | * JJJJKKKK * 8 | |
1658 | * JJJJJJJKKKKKKK * 8 | |
1659 | * JJJJJJJK * 8 | |
1660 | * {JKKKKKKK * 10}, JK | |
1661 | */ | |
1662 | static const u8 net2272_test_packet[] = { | |
1663 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
1664 | 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, | |
1665 | 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, | |
1666 | 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, | |
1667 | 0x7F, 0xBF, 0xDF, 0xEF, 0xF7, 0xFB, 0xFD, | |
1668 | 0xFC, 0x7E, 0xBF, 0xDF, 0xEF, 0xF7, 0xFD, 0x7E | |
1669 | }; | |
1670 | ||
1671 | static void | |
1672 | net2272_set_test_mode(struct net2272 *dev, int mode) | |
1673 | { | |
1674 | int i; | |
1675 | ||
1676 | /* Disable all net2272 interrupts: | |
1677 | * Nothing but a power cycle should stop the test. | |
1678 | */ | |
1679 | net2272_write(dev, IRQENB0, 0x00); | |
1680 | net2272_write(dev, IRQENB1, 0x00); | |
1681 | ||
1682 | /* Force tranceiver to high-speed */ | |
1683 | net2272_write(dev, XCVRDIAG, 1 << FORCE_HIGH_SPEED); | |
1684 | ||
1685 | net2272_write(dev, PAGESEL, 0); | |
1686 | net2272_write(dev, EP_STAT0, 1 << DATA_PACKET_TRANSMITTED_INTERRUPT); | |
1687 | net2272_write(dev, EP_RSPCLR, | |
1688 | (1 << CONTROL_STATUS_PHASE_HANDSHAKE) | |
1689 | | (1 << HIDE_STATUS_PHASE)); | |
1690 | net2272_write(dev, EP_CFG, 1 << ENDPOINT_DIRECTION); | |
1691 | net2272_write(dev, EP_STAT1, 1 << BUFFER_FLUSH); | |
1692 | ||
1693 | /* wait for status phase to complete */ | |
1694 | while (!(net2272_read(dev, EP_STAT0) & | |
1695 | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT))) | |
1696 | ; | |
1697 | ||
1698 | /* Enable test mode */ | |
1699 | net2272_write(dev, USBTEST, mode); | |
1700 | ||
1701 | /* load test packet */ | |
62fb45d3 | 1702 | if (mode == USB_TEST_PACKET) { |
ceb80363 SL |
1703 | /* switch to 8 bit mode */ |
1704 | net2272_write(dev, LOCCTL, net2272_read(dev, LOCCTL) & | |
1705 | ~(1 << DATA_WIDTH)); | |
1706 | ||
1707 | for (i = 0; i < sizeof(net2272_test_packet); ++i) | |
1708 | net2272_write(dev, EP_DATA, net2272_test_packet[i]); | |
1709 | ||
1710 | /* Validate test packet */ | |
1711 | net2272_write(dev, EP_TRANSFER0, 0); | |
1712 | } | |
1713 | } | |
1714 | ||
1715 | static void | |
1716 | net2272_handle_stat0_irqs(struct net2272 *dev, u8 stat) | |
1717 | { | |
1718 | struct net2272_ep *ep; | |
1719 | u8 num, scratch; | |
1720 | ||
1721 | /* starting a control request? */ | |
1722 | if (unlikely(stat & (1 << SETUP_PACKET_INTERRUPT))) { | |
1723 | union { | |
1724 | u8 raw[8]; | |
1725 | struct usb_ctrlrequest r; | |
1726 | } u; | |
1727 | int tmp = 0; | |
1728 | struct net2272_request *req; | |
1729 | ||
1730 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) { | |
1731 | if (net2272_read(dev, USBCTL1) & (1 << USB_HIGH_SPEED)) | |
1732 | dev->gadget.speed = USB_SPEED_HIGH; | |
1733 | else | |
1734 | dev->gadget.speed = USB_SPEED_FULL; | |
e538dfda MN |
1735 | dev_dbg(dev->dev, "%s\n", |
1736 | usb_speed_string(dev->gadget.speed)); | |
ceb80363 SL |
1737 | } |
1738 | ||
1739 | ep = &dev->ep[0]; | |
1740 | ep->irqs++; | |
1741 | ||
1742 | /* make sure any leftover interrupt state is cleared */ | |
1743 | stat &= ~(1 << ENDPOINT_0_INTERRUPT); | |
1744 | while (!list_empty(&ep->queue)) { | |
1745 | req = list_entry(ep->queue.next, | |
1746 | struct net2272_request, queue); | |
1747 | net2272_done(ep, req, | |
1748 | (req->req.actual == req->req.length) ? 0 : -EPROTO); | |
1749 | } | |
1750 | ep->stopped = 0; | |
1751 | dev->protocol_stall = 0; | |
1752 | net2272_ep_write(ep, EP_STAT0, | |
1753 | (1 << DATA_IN_TOKEN_INTERRUPT) | |
1754 | | (1 << DATA_OUT_TOKEN_INTERRUPT) | |
1755 | | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT) | |
1756 | | (1 << DATA_PACKET_RECEIVED_INTERRUPT) | |
1757 | | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)); | |
1758 | net2272_ep_write(ep, EP_STAT1, | |
1759 | (1 << TIMEOUT) | |
1760 | | (1 << USB_OUT_ACK_SENT) | |
1761 | | (1 << USB_OUT_NAK_SENT) | |
1762 | | (1 << USB_IN_ACK_RCVD) | |
1763 | | (1 << USB_IN_NAK_SENT) | |
1764 | | (1 << USB_STALL_SENT) | |
1765 | | (1 << LOCAL_OUT_ZLP)); | |
1766 | ||
1767 | /* | |
1768 | * Ensure Control Read pre-validation setting is beyond maximum size | |
1769 | * - Control Writes can leave non-zero values in EP_TRANSFER. If | |
1770 | * an EP0 transfer following the Control Write is a Control Read, | |
1771 | * the NET2272 sees the non-zero EP_TRANSFER as an unexpected | |
1772 | * pre-validation count. | |
1773 | * - Setting EP_TRANSFER beyond the maximum EP0 transfer size ensures | |
1774 | * the pre-validation count cannot cause an unexpected validatation | |
1775 | */ | |
1776 | net2272_write(dev, PAGESEL, 0); | |
1777 | net2272_write(dev, EP_TRANSFER2, 0xff); | |
1778 | net2272_write(dev, EP_TRANSFER1, 0xff); | |
1779 | net2272_write(dev, EP_TRANSFER0, 0xff); | |
1780 | ||
1781 | u.raw[0] = net2272_read(dev, SETUP0); | |
1782 | u.raw[1] = net2272_read(dev, SETUP1); | |
1783 | u.raw[2] = net2272_read(dev, SETUP2); | |
1784 | u.raw[3] = net2272_read(dev, SETUP3); | |
1785 | u.raw[4] = net2272_read(dev, SETUP4); | |
1786 | u.raw[5] = net2272_read(dev, SETUP5); | |
1787 | u.raw[6] = net2272_read(dev, SETUP6); | |
1788 | u.raw[7] = net2272_read(dev, SETUP7); | |
1789 | /* | |
1790 | * If you have a big endian cpu make sure le16_to_cpus | |
1791 | * performs the proper byte swapping here... | |
1792 | */ | |
1793 | le16_to_cpus(&u.r.wValue); | |
1794 | le16_to_cpus(&u.r.wIndex); | |
1795 | le16_to_cpus(&u.r.wLength); | |
1796 | ||
1797 | /* ack the irq */ | |
1798 | net2272_write(dev, IRQSTAT0, 1 << SETUP_PACKET_INTERRUPT); | |
1799 | stat ^= (1 << SETUP_PACKET_INTERRUPT); | |
1800 | ||
1801 | /* watch control traffic at the token level, and force | |
1802 | * synchronization before letting the status phase happen. | |
1803 | */ | |
1804 | ep->is_in = (u.r.bRequestType & USB_DIR_IN) != 0; | |
1805 | if (ep->is_in) { | |
1806 | scratch = (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE) | |
1807 | | (1 << DATA_OUT_TOKEN_INTERRUPT_ENABLE) | |
1808 | | (1 << DATA_IN_TOKEN_INTERRUPT_ENABLE); | |
1809 | stop_out_naking(ep); | |
1810 | } else | |
1811 | scratch = (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE) | |
1812 | | (1 << DATA_OUT_TOKEN_INTERRUPT_ENABLE) | |
1813 | | (1 << DATA_IN_TOKEN_INTERRUPT_ENABLE); | |
1814 | net2272_ep_write(ep, EP_IRQENB, scratch); | |
1815 | ||
1816 | if ((u.r.bRequestType & USB_TYPE_MASK) != USB_TYPE_STANDARD) | |
1817 | goto delegate; | |
1818 | switch (u.r.bRequest) { | |
1819 | case USB_REQ_GET_STATUS: { | |
1820 | struct net2272_ep *e; | |
1821 | u16 status = 0; | |
1822 | ||
1823 | switch (u.r.bRequestType & USB_RECIP_MASK) { | |
1824 | case USB_RECIP_ENDPOINT: | |
1825 | e = net2272_get_ep_by_addr(dev, u.r.wIndex); | |
1826 | if (!e || u.r.wLength > 2) | |
1827 | goto do_stall; | |
1828 | if (net2272_ep_read(e, EP_RSPSET) & (1 << ENDPOINT_HALT)) | |
b5c03bff | 1829 | status = cpu_to_le16(1); |
ceb80363 | 1830 | else |
b5c03bff | 1831 | status = cpu_to_le16(0); |
ceb80363 SL |
1832 | |
1833 | /* don't bother with a request object! */ | |
1834 | net2272_ep_write(&dev->ep[0], EP_IRQENB, 0); | |
1835 | writew(status, net2272_reg_addr(dev, EP_DATA)); | |
1836 | set_fifo_bytecount(&dev->ep[0], 0); | |
1837 | allow_status(ep); | |
1838 | dev_vdbg(dev->dev, "%s stat %02x\n", | |
1839 | ep->ep.name, status); | |
1840 | goto next_endpoints; | |
1841 | case USB_RECIP_DEVICE: | |
1842 | if (u.r.wLength > 2) | |
1843 | goto do_stall; | |
d4a1c479 | 1844 | if (dev->gadget.is_selfpowered) |
ceb80363 SL |
1845 | status = (1 << USB_DEVICE_SELF_POWERED); |
1846 | ||
1847 | /* don't bother with a request object! */ | |
1848 | net2272_ep_write(&dev->ep[0], EP_IRQENB, 0); | |
1849 | writew(status, net2272_reg_addr(dev, EP_DATA)); | |
1850 | set_fifo_bytecount(&dev->ep[0], 0); | |
1851 | allow_status(ep); | |
1852 | dev_vdbg(dev->dev, "device stat %02x\n", status); | |
1853 | goto next_endpoints; | |
1854 | case USB_RECIP_INTERFACE: | |
1855 | if (u.r.wLength > 2) | |
1856 | goto do_stall; | |
1857 | ||
1858 | /* don't bother with a request object! */ | |
1859 | net2272_ep_write(&dev->ep[0], EP_IRQENB, 0); | |
1860 | writew(status, net2272_reg_addr(dev, EP_DATA)); | |
1861 | set_fifo_bytecount(&dev->ep[0], 0); | |
1862 | allow_status(ep); | |
1863 | dev_vdbg(dev->dev, "interface status %02x\n", status); | |
1864 | goto next_endpoints; | |
1865 | } | |
1866 | ||
1867 | break; | |
1868 | } | |
1869 | case USB_REQ_CLEAR_FEATURE: { | |
1870 | struct net2272_ep *e; | |
1871 | ||
1872 | if (u.r.bRequestType != USB_RECIP_ENDPOINT) | |
1873 | goto delegate; | |
1874 | if (u.r.wValue != USB_ENDPOINT_HALT || | |
1875 | u.r.wLength != 0) | |
1876 | goto do_stall; | |
1877 | e = net2272_get_ep_by_addr(dev, u.r.wIndex); | |
1878 | if (!e) | |
1879 | goto do_stall; | |
1880 | if (e->wedged) { | |
1881 | dev_vdbg(dev->dev, "%s wedged, halt not cleared\n", | |
1882 | ep->ep.name); | |
1883 | } else { | |
1884 | dev_vdbg(dev->dev, "%s clear halt\n", ep->ep.name); | |
1885 | clear_halt(e); | |
1886 | } | |
1887 | allow_status(ep); | |
1888 | goto next_endpoints; | |
1889 | } | |
1890 | case USB_REQ_SET_FEATURE: { | |
1891 | struct net2272_ep *e; | |
1892 | ||
1893 | if (u.r.bRequestType == USB_RECIP_DEVICE) { | |
1894 | if (u.r.wIndex != NORMAL_OPERATION) | |
1895 | net2272_set_test_mode(dev, (u.r.wIndex >> 8)); | |
1896 | allow_status(ep); | |
1897 | dev_vdbg(dev->dev, "test mode: %d\n", u.r.wIndex); | |
1898 | goto next_endpoints; | |
1899 | } else if (u.r.bRequestType != USB_RECIP_ENDPOINT) | |
1900 | goto delegate; | |
1901 | if (u.r.wValue != USB_ENDPOINT_HALT || | |
1902 | u.r.wLength != 0) | |
1903 | goto do_stall; | |
1904 | e = net2272_get_ep_by_addr(dev, u.r.wIndex); | |
1905 | if (!e) | |
1906 | goto do_stall; | |
1907 | set_halt(e); | |
1908 | allow_status(ep); | |
1909 | dev_vdbg(dev->dev, "%s set halt\n", ep->ep.name); | |
1910 | goto next_endpoints; | |
1911 | } | |
1912 | case USB_REQ_SET_ADDRESS: { | |
1913 | net2272_write(dev, OURADDR, u.r.wValue & 0xff); | |
1914 | allow_status(ep); | |
1915 | break; | |
1916 | } | |
1917 | default: | |
1918 | delegate: | |
1919 | dev_vdbg(dev->dev, "setup %02x.%02x v%04x i%04x " | |
1920 | "ep_cfg %08x\n", | |
1921 | u.r.bRequestType, u.r.bRequest, | |
1922 | u.r.wValue, u.r.wIndex, | |
1923 | net2272_ep_read(ep, EP_CFG)); | |
87191ca9 AS |
1924 | if (dev->async_callbacks) { |
1925 | spin_unlock(&dev->lock); | |
1926 | tmp = dev->driver->setup(&dev->gadget, &u.r); | |
1927 | spin_lock(&dev->lock); | |
1928 | } | |
ceb80363 SL |
1929 | } |
1930 | ||
1931 | /* stall ep0 on error */ | |
1932 | if (tmp < 0) { | |
1933 | do_stall: | |
1934 | dev_vdbg(dev->dev, "req %02x.%02x protocol STALL; stat %d\n", | |
1935 | u.r.bRequestType, u.r.bRequest, tmp); | |
1936 | dev->protocol_stall = 1; | |
1937 | } | |
1938 | /* endpoint dma irq? */ | |
1939 | } else if (stat & (1 << DMA_DONE_INTERRUPT)) { | |
1940 | net2272_cancel_dma(dev); | |
1941 | net2272_write(dev, IRQSTAT0, 1 << DMA_DONE_INTERRUPT); | |
1942 | stat &= ~(1 << DMA_DONE_INTERRUPT); | |
1943 | num = (net2272_read(dev, DMAREQ) & (1 << DMA_ENDPOINT_SELECT)) | |
1944 | ? 2 : 1; | |
1945 | ||
1946 | ep = &dev->ep[num]; | |
1947 | net2272_handle_dma(ep); | |
1948 | } | |
1949 | ||
1950 | next_endpoints: | |
1951 | /* endpoint data irq? */ | |
1952 | scratch = stat & 0x0f; | |
1953 | stat &= ~0x0f; | |
1954 | for (num = 0; scratch; num++) { | |
1955 | u8 t; | |
1956 | ||
1957 | /* does this endpoint's FIFO and queue need tending? */ | |
1958 | t = 1 << num; | |
1959 | if ((scratch & t) == 0) | |
1960 | continue; | |
1961 | scratch ^= t; | |
1962 | ||
1963 | ep = &dev->ep[num]; | |
1964 | net2272_handle_ep(ep); | |
1965 | } | |
1966 | ||
1967 | /* some interrupts we can just ignore */ | |
1968 | stat &= ~(1 << SOF_INTERRUPT); | |
1969 | ||
1970 | if (stat) | |
1971 | dev_dbg(dev->dev, "unhandled irqstat0 %02x\n", stat); | |
1972 | } | |
1973 | ||
1974 | static void | |
1975 | net2272_handle_stat1_irqs(struct net2272 *dev, u8 stat) | |
1976 | { | |
1977 | u8 tmp, mask; | |
1978 | ||
1979 | /* after disconnect there's nothing else to do! */ | |
1980 | tmp = (1 << VBUS_INTERRUPT) | (1 << ROOT_PORT_RESET_INTERRUPT); | |
1981 | mask = (1 << USB_HIGH_SPEED) | (1 << USB_FULL_SPEED); | |
1982 | ||
1983 | if (stat & tmp) { | |
5ca1ccda AS |
1984 | bool reset = false; |
1985 | bool disconnect = false; | |
1986 | ||
1987 | /* | |
1988 | * Ignore disconnects and resets if the speed hasn't been set. | |
1989 | * VBUS can bounce and there's always an initial reset. | |
1990 | */ | |
ceb80363 | 1991 | net2272_write(dev, IRQSTAT1, tmp); |
5ca1ccda AS |
1992 | if (dev->gadget.speed != USB_SPEED_UNKNOWN) { |
1993 | if ((stat & (1 << VBUS_INTERRUPT)) && | |
1994 | (net2272_read(dev, USBCTL1) & | |
1995 | (1 << VBUS_PIN)) == 0) { | |
1996 | disconnect = true; | |
1997 | dev_dbg(dev->dev, "disconnect %s\n", | |
1998 | dev->driver->driver.name); | |
1999 | } else if ((stat & (1 << ROOT_PORT_RESET_INTERRUPT)) && | |
2000 | (net2272_read(dev, USBCTL1) & mask) | |
2001 | == 0) { | |
2002 | reset = true; | |
2003 | dev_dbg(dev->dev, "reset %s\n", | |
2004 | dev->driver->driver.name); | |
2005 | } | |
2006 | ||
2007 | if (disconnect || reset) { | |
2008 | stop_activity(dev, dev->driver); | |
2009 | net2272_ep0_start(dev); | |
87191ca9 AS |
2010 | if (dev->async_callbacks) { |
2011 | spin_unlock(&dev->lock); | |
2012 | if (reset) | |
2013 | usb_gadget_udc_reset(&dev->gadget, dev->driver); | |
2014 | else | |
2015 | (dev->driver->disconnect)(&dev->gadget); | |
2016 | spin_lock(&dev->lock); | |
2017 | } | |
5ca1ccda AS |
2018 | return; |
2019 | } | |
ceb80363 SL |
2020 | } |
2021 | stat &= ~tmp; | |
2022 | ||
2023 | if (!stat) | |
2024 | return; | |
2025 | } | |
2026 | ||
2027 | tmp = (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT); | |
2028 | if (stat & tmp) { | |
2029 | net2272_write(dev, IRQSTAT1, tmp); | |
2030 | if (stat & (1 << SUSPEND_REQUEST_INTERRUPT)) { | |
87191ca9 | 2031 | if (dev->async_callbacks && dev->driver->suspend) |
ceb80363 SL |
2032 | dev->driver->suspend(&dev->gadget); |
2033 | if (!enable_suspend) { | |
2034 | stat &= ~(1 << SUSPEND_REQUEST_INTERRUPT); | |
2035 | dev_dbg(dev->dev, "Suspend disabled, ignoring\n"); | |
2036 | } | |
2037 | } else { | |
87191ca9 | 2038 | if (dev->async_callbacks && dev->driver->resume) |
ceb80363 SL |
2039 | dev->driver->resume(&dev->gadget); |
2040 | } | |
2041 | stat &= ~tmp; | |
2042 | } | |
2043 | ||
2044 | /* clear any other status/irqs */ | |
2045 | if (stat) | |
2046 | net2272_write(dev, IRQSTAT1, stat); | |
2047 | ||
2048 | /* some status we can just ignore */ | |
2049 | stat &= ~((1 << CONTROL_STATUS_INTERRUPT) | |
2050 | | (1 << SUSPEND_REQUEST_INTERRUPT) | |
2051 | | (1 << RESUME_INTERRUPT)); | |
2052 | if (!stat) | |
2053 | return; | |
2054 | else | |
2055 | dev_dbg(dev->dev, "unhandled irqstat1 %02x\n", stat); | |
2056 | } | |
2057 | ||
2058 | static irqreturn_t net2272_irq(int irq, void *_dev) | |
2059 | { | |
2060 | struct net2272 *dev = _dev; | |
2061 | #if defined(PLX_PCI_RDK) || defined(PLX_PCI_RDK2) | |
2062 | u32 intcsr; | |
2063 | #endif | |
2064 | #if defined(PLX_PCI_RDK) | |
2065 | u8 dmareq; | |
2066 | #endif | |
2067 | spin_lock(&dev->lock); | |
2068 | #if defined(PLX_PCI_RDK) | |
2069 | intcsr = readl(dev->rdk1.plx9054_base_addr + INTCSR); | |
2070 | ||
2071 | if ((intcsr & LOCAL_INTERRUPT_TEST) == LOCAL_INTERRUPT_TEST) { | |
2072 | writel(intcsr & ~(1 << PCI_INTERRUPT_ENABLE), | |
2073 | dev->rdk1.plx9054_base_addr + INTCSR); | |
2074 | net2272_handle_stat1_irqs(dev, net2272_read(dev, IRQSTAT1)); | |
2075 | net2272_handle_stat0_irqs(dev, net2272_read(dev, IRQSTAT0)); | |
2076 | intcsr = readl(dev->rdk1.plx9054_base_addr + INTCSR); | |
2077 | writel(intcsr | (1 << PCI_INTERRUPT_ENABLE), | |
2078 | dev->rdk1.plx9054_base_addr + INTCSR); | |
2079 | } | |
2080 | if ((intcsr & DMA_CHANNEL_0_TEST) == DMA_CHANNEL_0_TEST) { | |
2081 | writeb((1 << CHANNEL_CLEAR_INTERRUPT | (0 << CHANNEL_ENABLE)), | |
2082 | dev->rdk1.plx9054_base_addr + DMACSR0); | |
2083 | ||
2084 | dmareq = net2272_read(dev, DMAREQ); | |
2085 | if (dmareq & 0x01) | |
2086 | net2272_handle_dma(&dev->ep[2]); | |
2087 | else | |
2088 | net2272_handle_dma(&dev->ep[1]); | |
2089 | } | |
2090 | #endif | |
2091 | #if defined(PLX_PCI_RDK2) | |
2092 | /* see if PCI int for us by checking irqstat */ | |
2093 | intcsr = readl(dev->rdk2.fpga_base_addr + RDK2_IRQSTAT); | |
07c69f11 | 2094 | if (!(intcsr & (1 << NET2272_PCI_IRQ))) { |
000b7f51 | 2095 | spin_unlock(&dev->lock); |
ceb80363 | 2096 | return IRQ_NONE; |
000b7f51 | 2097 | } |
ceb80363 SL |
2098 | /* check dma interrupts */ |
2099 | #endif | |
2100 | /* Platform/devcice interrupt handler */ | |
2101 | #if !defined(PLX_PCI_RDK) | |
2102 | net2272_handle_stat1_irqs(dev, net2272_read(dev, IRQSTAT1)); | |
2103 | net2272_handle_stat0_irqs(dev, net2272_read(dev, IRQSTAT0)); | |
2104 | #endif | |
2105 | spin_unlock(&dev->lock); | |
2106 | ||
2107 | return IRQ_HANDLED; | |
2108 | } | |
2109 | ||
2110 | static int net2272_present(struct net2272 *dev) | |
2111 | { | |
2112 | /* | |
2113 | * Quick test to see if CPU can communicate properly with the NET2272. | |
2114 | * Verifies connection using writes and reads to write/read and | |
2115 | * read-only registers. | |
2116 | * | |
2117 | * This routine is strongly recommended especially during early bring-up | |
2118 | * of new hardware, however for designs that do not apply Power On System | |
2119 | * Tests (POST) it may discarded (or perhaps minimized). | |
2120 | */ | |
2121 | unsigned int ii; | |
2122 | u8 val, refval; | |
2123 | ||
2124 | /* Verify NET2272 write/read SCRATCH register can write and read */ | |
2125 | refval = net2272_read(dev, SCRATCH); | |
2126 | for (ii = 0; ii < 0x100; ii += 7) { | |
2127 | net2272_write(dev, SCRATCH, ii); | |
2128 | val = net2272_read(dev, SCRATCH); | |
2129 | if (val != ii) { | |
2130 | dev_dbg(dev->dev, | |
2131 | "%s: write/read SCRATCH register test failed: " | |
2132 | "wrote:0x%2.2x, read:0x%2.2x\n", | |
2133 | __func__, ii, val); | |
2134 | return -EINVAL; | |
2135 | } | |
2136 | } | |
2137 | /* To be nice, we write the original SCRATCH value back: */ | |
2138 | net2272_write(dev, SCRATCH, refval); | |
2139 | ||
2140 | /* Verify NET2272 CHIPREV register is read-only: */ | |
2141 | refval = net2272_read(dev, CHIPREV_2272); | |
2142 | for (ii = 0; ii < 0x100; ii += 7) { | |
2143 | net2272_write(dev, CHIPREV_2272, ii); | |
2144 | val = net2272_read(dev, CHIPREV_2272); | |
2145 | if (val != refval) { | |
2146 | dev_dbg(dev->dev, | |
2147 | "%s: write/read CHIPREV register test failed: " | |
2148 | "wrote 0x%2.2x, read:0x%2.2x expected:0x%2.2x\n", | |
2149 | __func__, ii, val, refval); | |
2150 | return -EINVAL; | |
2151 | } | |
2152 | } | |
2153 | ||
2154 | /* | |
2155 | * Verify NET2272's "NET2270 legacy revision" register | |
2156 | * - NET2272 has two revision registers. The NET2270 legacy revision | |
2157 | * register should read the same value, regardless of the NET2272 | |
2158 | * silicon revision. The legacy register applies to NET2270 | |
2159 | * firmware being applied to the NET2272. | |
2160 | */ | |
2161 | val = net2272_read(dev, CHIPREV_LEGACY); | |
2162 | if (val != NET2270_LEGACY_REV) { | |
2163 | /* | |
2164 | * Unexpected legacy revision value | |
2165 | * - Perhaps the chip is a NET2270? | |
2166 | */ | |
2167 | dev_dbg(dev->dev, | |
2168 | "%s: WARNING: UNEXPECTED NET2272 LEGACY REGISTER VALUE:\n" | |
2169 | " - CHIPREV_LEGACY: expected 0x%2.2x, got:0x%2.2x. (Not NET2272?)\n", | |
2170 | __func__, NET2270_LEGACY_REV, val); | |
2171 | return -EINVAL; | |
2172 | } | |
2173 | ||
2174 | /* | |
2175 | * Verify NET2272 silicon revision | |
2176 | * - This revision register is appropriate for the silicon version | |
2177 | * of the NET2272 | |
2178 | */ | |
2179 | val = net2272_read(dev, CHIPREV_2272); | |
2180 | switch (val) { | |
2181 | case CHIPREV_NET2272_R1: | |
2182 | /* | |
2183 | * NET2272 Rev 1 has DMA related errata: | |
2184 | * - Newer silicon (Rev 1A or better) required | |
2185 | */ | |
2186 | dev_dbg(dev->dev, | |
2187 | "%s: Rev 1 detected: newer silicon recommended for DMA support\n", | |
2188 | __func__); | |
2189 | break; | |
2190 | case CHIPREV_NET2272_R1A: | |
2191 | break; | |
2192 | default: | |
2193 | /* NET2272 silicon version *may* not work with this firmware */ | |
2194 | dev_dbg(dev->dev, | |
2195 | "%s: unexpected silicon revision register value: " | |
2196 | " CHIPREV_2272: 0x%2.2x\n", | |
2197 | __func__, val); | |
2198 | /* | |
2199 | * Return Success, even though the chip rev is not an expected value | |
2200 | * - Older, pre-built firmware can attempt to operate on newer silicon | |
2201 | * - Often, new silicon is perfectly compatible | |
2202 | */ | |
2203 | } | |
2204 | ||
2205 | /* Success: NET2272 checks out OK */ | |
2206 | return 0; | |
2207 | } | |
2208 | ||
2209 | static void | |
2210 | net2272_gadget_release(struct device *_dev) | |
2211 | { | |
9b719c71 AS |
2212 | struct net2272 *dev = container_of(_dev, struct net2272, gadget.dev); |
2213 | ||
ceb80363 SL |
2214 | kfree(dev); |
2215 | } | |
2216 | ||
2217 | /*---------------------------------------------------------------------------*/ | |
2218 | ||
fb4e98ab | 2219 | static void |
ceb80363 SL |
2220 | net2272_remove(struct net2272 *dev) |
2221 | { | |
9b719c71 AS |
2222 | if (dev->added) |
2223 | usb_del_gadget(&dev->gadget); | |
ceb80363 SL |
2224 | free_irq(dev->irq, dev); |
2225 | iounmap(dev->base_addr); | |
ceb80363 SL |
2226 | device_remove_file(dev->dev, &dev_attr_registers); |
2227 | ||
2228 | dev_info(dev->dev, "unbind\n"); | |
ceb80363 SL |
2229 | } |
2230 | ||
41ac7b3a | 2231 | static struct net2272 *net2272_probe_init(struct device *dev, unsigned int irq) |
ceb80363 SL |
2232 | { |
2233 | struct net2272 *ret; | |
2234 | ||
ceb80363 SL |
2235 | if (!irq) { |
2236 | dev_dbg(dev, "No IRQ!\n"); | |
2237 | return ERR_PTR(-ENODEV); | |
2238 | } | |
2239 | ||
2240 | /* alloc, and start init */ | |
2241 | ret = kzalloc(sizeof(*ret), GFP_KERNEL); | |
2242 | if (!ret) | |
2243 | return ERR_PTR(-ENOMEM); | |
2244 | ||
2245 | spin_lock_init(&ret->lock); | |
2246 | ret->irq = irq; | |
2247 | ret->dev = dev; | |
2248 | ret->gadget.ops = &net2272_ops; | |
d327ab5b | 2249 | ret->gadget.max_speed = USB_SPEED_HIGH; |
ceb80363 SL |
2250 | |
2251 | /* the "gadget" abstracts/virtualizes the controller */ | |
ceb80363 | 2252 | ret->gadget.name = driver_name; |
9b719c71 | 2253 | usb_initialize_gadget(dev, &ret->gadget, net2272_gadget_release); |
ceb80363 SL |
2254 | |
2255 | return ret; | |
2256 | } | |
2257 | ||
41ac7b3a | 2258 | static int |
ceb80363 SL |
2259 | net2272_probe_fin(struct net2272 *dev, unsigned int irqflags) |
2260 | { | |
2261 | int ret; | |
2262 | ||
2263 | /* See if there... */ | |
2264 | if (net2272_present(dev)) { | |
2265 | dev_warn(dev->dev, "2272 not found!\n"); | |
2266 | ret = -ENODEV; | |
2267 | goto err; | |
2268 | } | |
2269 | ||
2270 | net2272_usb_reset(dev); | |
2271 | net2272_usb_reinit(dev); | |
2272 | ||
2273 | ret = request_irq(dev->irq, net2272_irq, irqflags, driver_name, dev); | |
2274 | if (ret) { | |
2275 | dev_err(dev->dev, "request interrupt %i failed\n", dev->irq); | |
2276 | goto err; | |
2277 | } | |
2278 | ||
2279 | dev->chiprev = net2272_read(dev, CHIPREV_2272); | |
2280 | ||
2281 | /* done */ | |
2282 | dev_info(dev->dev, "%s\n", driver_desc); | |
2283 | dev_info(dev->dev, "irq %i, mem %p, chip rev %04x, dma %s\n", | |
2284 | dev->irq, dev->base_addr, dev->chiprev, | |
2285 | dma_mode_string()); | |
2286 | dev_info(dev->dev, "version: %s\n", driver_vers); | |
2287 | ||
ceb80363 SL |
2288 | ret = device_create_file(dev->dev, &dev_attr_registers); |
2289 | if (ret) | |
c9f9c849 | 2290 | goto err_irq; |
ceb80363 | 2291 | |
9b719c71 | 2292 | ret = usb_add_gadget(&dev->gadget); |
0f91349b SAS |
2293 | if (ret) |
2294 | goto err_add_udc; | |
9b719c71 | 2295 | dev->added = 1; |
0f91349b | 2296 | |
ceb80363 SL |
2297 | return 0; |
2298 | ||
0f91349b SAS |
2299 | err_add_udc: |
2300 | device_remove_file(dev->dev, &dev_attr_registers); | |
ceb80363 SL |
2301 | err_irq: |
2302 | free_irq(dev->irq, dev); | |
2303 | err: | |
2304 | return ret; | |
2305 | } | |
2306 | ||
2c93e790 | 2307 | #ifdef CONFIG_USB_PCI |
ceb80363 SL |
2308 | |
2309 | /* | |
2310 | * wrap this driver around the specified device, but | |
2311 | * don't respond over USB until a gadget driver binds to us | |
2312 | */ | |
2313 | ||
41ac7b3a | 2314 | static int |
ceb80363 SL |
2315 | net2272_rdk1_probe(struct pci_dev *pdev, struct net2272 *dev) |
2316 | { | |
2317 | unsigned long resource, len, tmp; | |
2318 | void __iomem *mem_mapped_addr[4]; | |
2319 | int ret, i; | |
2320 | ||
2321 | /* | |
2322 | * BAR 0 holds PLX 9054 config registers | |
2323 | * BAR 1 is i/o memory; unused here | |
2324 | * BAR 2 holds EPLD config registers | |
2325 | * BAR 3 holds NET2272 registers | |
2326 | */ | |
2327 | ||
2328 | /* Find and map all address spaces */ | |
2329 | for (i = 0; i < 4; ++i) { | |
2330 | if (i == 1) | |
2331 | continue; /* BAR1 unused */ | |
2332 | ||
2333 | resource = pci_resource_start(pdev, i); | |
2334 | len = pci_resource_len(pdev, i); | |
2335 | ||
2336 | if (!request_mem_region(resource, len, driver_name)) { | |
2337 | dev_dbg(dev->dev, "controller already in use\n"); | |
2338 | ret = -EBUSY; | |
2339 | goto err; | |
2340 | } | |
2341 | ||
4bdc0d67 | 2342 | mem_mapped_addr[i] = ioremap(resource, len); |
ceb80363 SL |
2343 | if (mem_mapped_addr[i] == NULL) { |
2344 | release_mem_region(resource, len); | |
2345 | dev_dbg(dev->dev, "can't map memory\n"); | |
2346 | ret = -EFAULT; | |
2347 | goto err; | |
2348 | } | |
2349 | } | |
2350 | ||
2351 | dev->rdk1.plx9054_base_addr = mem_mapped_addr[0]; | |
2352 | dev->rdk1.epld_base_addr = mem_mapped_addr[2]; | |
2353 | dev->base_addr = mem_mapped_addr[3]; | |
2354 | ||
2355 | /* Set PLX 9054 bus width (16 bits) */ | |
2356 | tmp = readl(dev->rdk1.plx9054_base_addr + LBRD1); | |
2357 | writel((tmp & ~(3 << MEMORY_SPACE_LOCAL_BUS_WIDTH)) | W16_BIT, | |
2358 | dev->rdk1.plx9054_base_addr + LBRD1); | |
2359 | ||
2360 | /* Enable PLX 9054 Interrupts */ | |
2361 | writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) | | |
2362 | (1 << PCI_INTERRUPT_ENABLE) | | |
2363 | (1 << LOCAL_INTERRUPT_INPUT_ENABLE), | |
2364 | dev->rdk1.plx9054_base_addr + INTCSR); | |
2365 | ||
2366 | writeb((1 << CHANNEL_CLEAR_INTERRUPT | (0 << CHANNEL_ENABLE)), | |
2367 | dev->rdk1.plx9054_base_addr + DMACSR0); | |
2368 | ||
2369 | /* reset */ | |
2370 | writeb((1 << EPLD_DMA_ENABLE) | | |
2371 | (1 << DMA_CTL_DACK) | | |
2372 | (1 << DMA_TIMEOUT_ENABLE) | | |
2373 | (1 << USER) | | |
2374 | (0 << MPX_MODE) | | |
2375 | (1 << BUSWIDTH) | | |
2376 | (1 << NET2272_RESET), | |
2377 | dev->base_addr + EPLD_IO_CONTROL_REGISTER); | |
2378 | ||
2379 | mb(); | |
2380 | writeb(readb(dev->base_addr + EPLD_IO_CONTROL_REGISTER) & | |
2381 | ~(1 << NET2272_RESET), | |
2382 | dev->base_addr + EPLD_IO_CONTROL_REGISTER); | |
2383 | udelay(200); | |
2384 | ||
2385 | return 0; | |
2386 | ||
2387 | err: | |
2388 | while (--i >= 0) { | |
ae90cc82 EN |
2389 | if (i == 1) |
2390 | continue; /* BAR1 unused */ | |
ceb80363 SL |
2391 | iounmap(mem_mapped_addr[i]); |
2392 | release_mem_region(pci_resource_start(pdev, i), | |
2393 | pci_resource_len(pdev, i)); | |
2394 | } | |
2395 | ||
2396 | return ret; | |
2397 | } | |
2398 | ||
41ac7b3a | 2399 | static int |
ceb80363 SL |
2400 | net2272_rdk2_probe(struct pci_dev *pdev, struct net2272 *dev) |
2401 | { | |
2402 | unsigned long resource, len; | |
2403 | void __iomem *mem_mapped_addr[2]; | |
2404 | int ret, i; | |
2405 | ||
2406 | /* | |
2407 | * BAR 0 holds FGPA config registers | |
2408 | * BAR 1 holds NET2272 registers | |
2409 | */ | |
2410 | ||
2411 | /* Find and map all address spaces, bar2-3 unused in rdk 2 */ | |
2412 | for (i = 0; i < 2; ++i) { | |
2413 | resource = pci_resource_start(pdev, i); | |
2414 | len = pci_resource_len(pdev, i); | |
2415 | ||
2416 | if (!request_mem_region(resource, len, driver_name)) { | |
2417 | dev_dbg(dev->dev, "controller already in use\n"); | |
2418 | ret = -EBUSY; | |
2419 | goto err; | |
2420 | } | |
2421 | ||
4bdc0d67 | 2422 | mem_mapped_addr[i] = ioremap(resource, len); |
ceb80363 SL |
2423 | if (mem_mapped_addr[i] == NULL) { |
2424 | release_mem_region(resource, len); | |
2425 | dev_dbg(dev->dev, "can't map memory\n"); | |
2426 | ret = -EFAULT; | |
2427 | goto err; | |
2428 | } | |
2429 | } | |
2430 | ||
2431 | dev->rdk2.fpga_base_addr = mem_mapped_addr[0]; | |
2432 | dev->base_addr = mem_mapped_addr[1]; | |
2433 | ||
2434 | mb(); | |
2435 | /* Set 2272 bus width (16 bits) and reset */ | |
2436 | writel((1 << CHIP_RESET), dev->rdk2.fpga_base_addr + RDK2_LOCCTLRDK); | |
2437 | udelay(200); | |
2438 | writel((1 << BUS_WIDTH), dev->rdk2.fpga_base_addr + RDK2_LOCCTLRDK); | |
2439 | /* Print fpga version number */ | |
2440 | dev_info(dev->dev, "RDK2 FPGA version %08x\n", | |
2441 | readl(dev->rdk2.fpga_base_addr + RDK2_FPGAREV)); | |
2442 | /* Enable FPGA Interrupts */ | |
2443 | writel((1 << NET2272_PCI_IRQ), dev->rdk2.fpga_base_addr + RDK2_IRQENB); | |
2444 | ||
2445 | return 0; | |
2446 | ||
2447 | err: | |
2448 | while (--i >= 0) { | |
2449 | iounmap(mem_mapped_addr[i]); | |
2450 | release_mem_region(pci_resource_start(pdev, i), | |
2451 | pci_resource_len(pdev, i)); | |
2452 | } | |
2453 | ||
2454 | return ret; | |
2455 | } | |
2456 | ||
41ac7b3a | 2457 | static int |
ceb80363 SL |
2458 | net2272_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
2459 | { | |
2460 | struct net2272 *dev; | |
2461 | int ret; | |
2462 | ||
2463 | dev = net2272_probe_init(&pdev->dev, pdev->irq); | |
2464 | if (IS_ERR(dev)) | |
2465 | return PTR_ERR(dev); | |
2466 | dev->dev_id = pdev->device; | |
2467 | ||
2468 | if (pci_enable_device(pdev) < 0) { | |
2469 | ret = -ENODEV; | |
9b719c71 | 2470 | goto err_put; |
ceb80363 SL |
2471 | } |
2472 | ||
2473 | pci_set_master(pdev); | |
2474 | ||
2475 | switch (pdev->device) { | |
2476 | case PCI_DEVICE_ID_RDK1: ret = net2272_rdk1_probe(pdev, dev); break; | |
2477 | case PCI_DEVICE_ID_RDK2: ret = net2272_rdk2_probe(pdev, dev); break; | |
2478 | default: BUG(); | |
2479 | } | |
2480 | if (ret) | |
2481 | goto err_pci; | |
2482 | ||
2483 | ret = net2272_probe_fin(dev, 0); | |
2484 | if (ret) | |
2485 | goto err_pci; | |
2486 | ||
2487 | pci_set_drvdata(pdev, dev); | |
2488 | ||
2489 | return 0; | |
2490 | ||
2491 | err_pci: | |
2492 | pci_disable_device(pdev); | |
9b719c71 AS |
2493 | err_put: |
2494 | usb_put_gadget(&dev->gadget); | |
ceb80363 SL |
2495 | |
2496 | return ret; | |
2497 | } | |
2498 | ||
fb4e98ab | 2499 | static void |
ceb80363 SL |
2500 | net2272_rdk1_remove(struct pci_dev *pdev, struct net2272 *dev) |
2501 | { | |
2502 | int i; | |
2503 | ||
2504 | /* disable PLX 9054 interrupts */ | |
2505 | writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) & | |
2506 | ~(1 << PCI_INTERRUPT_ENABLE), | |
2507 | dev->rdk1.plx9054_base_addr + INTCSR); | |
2508 | ||
2509 | /* clean up resources allocated during probe() */ | |
2510 | iounmap(dev->rdk1.plx9054_base_addr); | |
2511 | iounmap(dev->rdk1.epld_base_addr); | |
2512 | ||
2513 | for (i = 0; i < 4; ++i) { | |
2514 | if (i == 1) | |
2515 | continue; /* BAR1 unused */ | |
2516 | release_mem_region(pci_resource_start(pdev, i), | |
2517 | pci_resource_len(pdev, i)); | |
2518 | } | |
2519 | } | |
2520 | ||
fb4e98ab | 2521 | static void |
ceb80363 SL |
2522 | net2272_rdk2_remove(struct pci_dev *pdev, struct net2272 *dev) |
2523 | { | |
2524 | int i; | |
2525 | ||
2526 | /* disable fpga interrupts | |
2527 | writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) & | |
2528 | ~(1 << PCI_INTERRUPT_ENABLE), | |
2529 | dev->rdk1.plx9054_base_addr + INTCSR); | |
2530 | */ | |
2531 | ||
2532 | /* clean up resources allocated during probe() */ | |
2533 | iounmap(dev->rdk2.fpga_base_addr); | |
2534 | ||
2535 | for (i = 0; i < 2; ++i) | |
2536 | release_mem_region(pci_resource_start(pdev, i), | |
2537 | pci_resource_len(pdev, i)); | |
2538 | } | |
2539 | ||
fb4e98ab | 2540 | static void |
ceb80363 SL |
2541 | net2272_pci_remove(struct pci_dev *pdev) |
2542 | { | |
2543 | struct net2272 *dev = pci_get_drvdata(pdev); | |
2544 | ||
2545 | net2272_remove(dev); | |
2546 | ||
2547 | switch (pdev->device) { | |
2548 | case PCI_DEVICE_ID_RDK1: net2272_rdk1_remove(pdev, dev); break; | |
2549 | case PCI_DEVICE_ID_RDK2: net2272_rdk2_remove(pdev, dev); break; | |
2550 | default: BUG(); | |
2551 | } | |
2552 | ||
2553 | pci_disable_device(pdev); | |
2554 | ||
9b719c71 | 2555 | usb_put_gadget(&dev->gadget); |
ceb80363 SL |
2556 | } |
2557 | ||
2558 | /* Table of matching PCI IDs */ | |
d3608b6d | 2559 | static struct pci_device_id pci_ids[] = { |
ceb80363 SL |
2560 | { /* RDK 1 card */ |
2561 | .class = ((PCI_CLASS_BRIDGE_OTHER << 8) | 0xfe), | |
2562 | .class_mask = 0, | |
2563 | .vendor = PCI_VENDOR_ID_PLX, | |
2564 | .device = PCI_DEVICE_ID_RDK1, | |
2565 | .subvendor = PCI_ANY_ID, | |
2566 | .subdevice = PCI_ANY_ID, | |
2567 | }, | |
2568 | { /* RDK 2 card */ | |
2569 | .class = ((PCI_CLASS_BRIDGE_OTHER << 8) | 0xfe), | |
2570 | .class_mask = 0, | |
2571 | .vendor = PCI_VENDOR_ID_PLX, | |
2572 | .device = PCI_DEVICE_ID_RDK2, | |
2573 | .subvendor = PCI_ANY_ID, | |
2574 | .subdevice = PCI_ANY_ID, | |
2575 | }, | |
2576 | { } | |
2577 | }; | |
2578 | MODULE_DEVICE_TABLE(pci, pci_ids); | |
2579 | ||
2580 | static struct pci_driver net2272_pci_driver = { | |
2581 | .name = driver_name, | |
2582 | .id_table = pci_ids, | |
2583 | ||
2584 | .probe = net2272_pci_probe, | |
7690417d | 2585 | .remove = net2272_pci_remove, |
ceb80363 SL |
2586 | }; |
2587 | ||
e4fe056e SAS |
2588 | static int net2272_pci_register(void) |
2589 | { | |
2590 | return pci_register_driver(&net2272_pci_driver); | |
2591 | } | |
2592 | ||
2593 | static void net2272_pci_unregister(void) | |
2594 | { | |
2595 | pci_unregister_driver(&net2272_pci_driver); | |
2596 | } | |
2597 | ||
ceb80363 | 2598 | #else |
e4fe056e SAS |
2599 | static inline int net2272_pci_register(void) { return 0; } |
2600 | static inline void net2272_pci_unregister(void) { } | |
ceb80363 SL |
2601 | #endif |
2602 | ||
2603 | /*---------------------------------------------------------------------------*/ | |
2604 | ||
41ac7b3a | 2605 | static int |
ceb80363 SL |
2606 | net2272_plat_probe(struct platform_device *pdev) |
2607 | { | |
2608 | struct net2272 *dev; | |
2609 | int ret; | |
2610 | unsigned int irqflags; | |
2611 | resource_size_t base, len; | |
2612 | struct resource *iomem, *iomem_bus, *irq_res; | |
2613 | ||
2614 | irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
2615 | iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
2616 | iomem_bus = platform_get_resource(pdev, IORESOURCE_BUS, 0); | |
2617 | if (!irq_res || !iomem) { | |
2618 | dev_err(&pdev->dev, "must provide irq/base addr"); | |
2619 | return -EINVAL; | |
2620 | } | |
2621 | ||
2622 | dev = net2272_probe_init(&pdev->dev, irq_res->start); | |
2623 | if (IS_ERR(dev)) | |
2624 | return PTR_ERR(dev); | |
2625 | ||
2626 | irqflags = 0; | |
2627 | if (irq_res->flags & IORESOURCE_IRQ_HIGHEDGE) | |
2628 | irqflags |= IRQF_TRIGGER_RISING; | |
2629 | if (irq_res->flags & IORESOURCE_IRQ_LOWEDGE) | |
2630 | irqflags |= IRQF_TRIGGER_FALLING; | |
2631 | if (irq_res->flags & IORESOURCE_IRQ_HIGHLEVEL) | |
2632 | irqflags |= IRQF_TRIGGER_HIGH; | |
2633 | if (irq_res->flags & IORESOURCE_IRQ_LOWLEVEL) | |
2634 | irqflags |= IRQF_TRIGGER_LOW; | |
2635 | ||
2636 | base = iomem->start; | |
2637 | len = resource_size(iomem); | |
2638 | if (iomem_bus) | |
2639 | dev->base_shift = iomem_bus->start; | |
2640 | ||
2641 | if (!request_mem_region(base, len, driver_name)) { | |
2642 | dev_dbg(dev->dev, "get request memory region!\n"); | |
2643 | ret = -EBUSY; | |
2644 | goto err; | |
2645 | } | |
4bdc0d67 | 2646 | dev->base_addr = ioremap(base, len); |
ceb80363 SL |
2647 | if (!dev->base_addr) { |
2648 | dev_dbg(dev->dev, "can't map memory\n"); | |
2649 | ret = -EFAULT; | |
2650 | goto err_req; | |
2651 | } | |
2652 | ||
2653 | ret = net2272_probe_fin(dev, IRQF_TRIGGER_LOW); | |
2654 | if (ret) | |
2655 | goto err_io; | |
2656 | ||
2657 | platform_set_drvdata(pdev, dev); | |
2658 | dev_info(&pdev->dev, "running in 16-bit, %sbyte swap local bus mode\n", | |
2659 | (net2272_read(dev, LOCCTL) & (1 << BYTE_SWAP)) ? "" : "no "); | |
2660 | ||
ceb80363 SL |
2661 | return 0; |
2662 | ||
2663 | err_io: | |
2664 | iounmap(dev->base_addr); | |
2665 | err_req: | |
2666 | release_mem_region(base, len); | |
2667 | err: | |
9b719c71 | 2668 | usb_put_gadget(&dev->gadget); |
ccaef7e6 | 2669 | |
ceb80363 SL |
2670 | return ret; |
2671 | } | |
2672 | ||
fb4e98ab | 2673 | static int |
ceb80363 SL |
2674 | net2272_plat_remove(struct platform_device *pdev) |
2675 | { | |
2676 | struct net2272 *dev = platform_get_drvdata(pdev); | |
2677 | ||
2678 | net2272_remove(dev); | |
2679 | ||
2680 | release_mem_region(pdev->resource[0].start, | |
2681 | resource_size(&pdev->resource[0])); | |
2682 | ||
9b719c71 | 2683 | usb_put_gadget(&dev->gadget); |
ceb80363 SL |
2684 | |
2685 | return 0; | |
2686 | } | |
2687 | ||
2688 | static struct platform_driver net2272_plat_driver = { | |
2689 | .probe = net2272_plat_probe, | |
7690417d | 2690 | .remove = net2272_plat_remove, |
ceb80363 SL |
2691 | .driver = { |
2692 | .name = driver_name, | |
ceb80363 SL |
2693 | }, |
2694 | /* FIXME .suspend, .resume */ | |
2695 | }; | |
86081d7b | 2696 | MODULE_ALIAS("platform:net2272"); |
ceb80363 SL |
2697 | |
2698 | static int __init net2272_init(void) | |
2699 | { | |
e4fe056e SAS |
2700 | int ret; |
2701 | ||
2702 | ret = net2272_pci_register(); | |
2703 | if (ret) | |
2704 | return ret; | |
2705 | ret = platform_driver_register(&net2272_plat_driver); | |
2706 | if (ret) | |
2707 | goto err_pci; | |
2708 | return ret; | |
2709 | ||
2710 | err_pci: | |
2711 | net2272_pci_unregister(); | |
2712 | return ret; | |
ceb80363 SL |
2713 | } |
2714 | module_init(net2272_init); | |
2715 | ||
2716 | static void __exit net2272_cleanup(void) | |
2717 | { | |
e4fe056e | 2718 | net2272_pci_unregister(); |
ceb80363 SL |
2719 | platform_driver_unregister(&net2272_plat_driver); |
2720 | } | |
2721 | module_exit(net2272_cleanup); | |
2722 | ||
2723 | MODULE_DESCRIPTION(DRIVER_DESC); | |
2724 | MODULE_AUTHOR("PLX Technology, Inc."); | |
2725 | MODULE_LICENSE("GPL"); |