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ceb80363 SL |
1 | /* |
2 | * Driver for PLX NET2272 USB device controller | |
3 | * | |
4 | * Copyright (C) 2005-2006 PLX Technology, Inc. | |
5 | * Copyright (C) 2006-2011 Analog Devices, Inc. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | ||
22 | #include <linux/delay.h> | |
23 | #include <linux/device.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/gpio.h> | |
26 | #include <linux/init.h> | |
27 | #include <linux/interrupt.h> | |
28 | #include <linux/io.h> | |
29 | #include <linux/ioport.h> | |
ceb80363 SL |
30 | #include <linux/kernel.h> |
31 | #include <linux/list.h> | |
32 | #include <linux/module.h> | |
33 | #include <linux/moduleparam.h> | |
34 | #include <linux/pci.h> | |
35 | #include <linux/platform_device.h> | |
d84d6615 | 36 | #include <linux/prefetch.h> |
ceb80363 SL |
37 | #include <linux/sched.h> |
38 | #include <linux/slab.h> | |
39 | #include <linux/timer.h> | |
40 | #include <linux/usb.h> | |
41 | #include <linux/usb/ch9.h> | |
42 | #include <linux/usb/gadget.h> | |
43 | ||
44 | #include <asm/byteorder.h> | |
ceb80363 SL |
45 | #include <asm/unaligned.h> |
46 | ||
47 | #include "net2272.h" | |
48 | ||
49 | #define DRIVER_DESC "PLX NET2272 USB Peripheral Controller" | |
50 | ||
51 | static const char driver_name[] = "net2272"; | |
52 | static const char driver_vers[] = "2006 October 17/mainline"; | |
53 | static const char driver_desc[] = DRIVER_DESC; | |
54 | ||
55 | static const char ep0name[] = "ep0"; | |
56 | static const char * const ep_name[] = { | |
57 | ep0name, | |
58 | "ep-a", "ep-b", "ep-c", | |
59 | }; | |
60 | ||
eda81bea | 61 | #ifdef CONFIG_USB_NET2272_DMA |
ceb80363 SL |
62 | /* |
63 | * use_dma: the NET2272 can use an external DMA controller. | |
64 | * Note that since there is no generic DMA api, some functions, | |
65 | * notably request_dma, start_dma, and cancel_dma will need to be | |
66 | * modified for your platform's particular dma controller. | |
67 | * | |
68 | * If use_dma is disabled, pio will be used instead. | |
69 | */ | |
90ab5ee9 | 70 | static bool use_dma = 0; |
ceb80363 SL |
71 | module_param(use_dma, bool, 0644); |
72 | ||
73 | /* | |
74 | * dma_ep: selects the endpoint for use with dma (1=ep-a, 2=ep-b) | |
75 | * The NET2272 can only use dma for a single endpoint at a time. | |
76 | * At some point this could be modified to allow either endpoint | |
77 | * to take control of dma as it becomes available. | |
78 | * | |
79 | * Note that DMA should not be used on OUT endpoints unless it can | |
80 | * be guaranteed that no short packets will arrive on an IN endpoint | |
81 | * while the DMA operation is pending. Otherwise the OUT DMA will | |
82 | * terminate prematurely (See NET2272 Errata 630-0213-0101) | |
83 | */ | |
84 | static ushort dma_ep = 1; | |
85 | module_param(dma_ep, ushort, 0644); | |
86 | ||
87 | /* | |
88 | * dma_mode: net2272 dma mode setting (see LOCCTL1 definiton): | |
89 | * mode 0 == Slow DREQ mode | |
90 | * mode 1 == Fast DREQ mode | |
91 | * mode 2 == Burst mode | |
92 | */ | |
93 | static ushort dma_mode = 2; | |
94 | module_param(dma_mode, ushort, 0644); | |
95 | #else | |
96 | #define use_dma 0 | |
97 | #define dma_ep 1 | |
98 | #define dma_mode 2 | |
99 | #endif | |
100 | ||
101 | /* | |
102 | * fifo_mode: net2272 buffer configuration: | |
103 | * mode 0 == ep-{a,b,c} 512db each | |
104 | * mode 1 == ep-a 1k, ep-{b,c} 512db | |
105 | * mode 2 == ep-a 1k, ep-b 1k, ep-c 512db | |
106 | * mode 3 == ep-a 1k, ep-b disabled, ep-c 512db | |
107 | */ | |
108 | static ushort fifo_mode = 0; | |
109 | module_param(fifo_mode, ushort, 0644); | |
110 | ||
111 | /* | |
112 | * enable_suspend: When enabled, the driver will respond to | |
113 | * USB suspend requests by powering down the NET2272. Otherwise, | |
114 | * USB suspend requests will be ignored. This is acceptible for | |
115 | * self-powered devices. For bus powered devices set this to 1. | |
116 | */ | |
117 | static ushort enable_suspend = 0; | |
118 | module_param(enable_suspend, ushort, 0644); | |
119 | ||
120 | static void assert_out_naking(struct net2272_ep *ep, const char *where) | |
121 | { | |
122 | u8 tmp; | |
123 | ||
124 | #ifndef DEBUG | |
125 | return; | |
126 | #endif | |
127 | ||
128 | tmp = net2272_ep_read(ep, EP_STAT0); | |
129 | if ((tmp & (1 << NAK_OUT_PACKETS)) == 0) { | |
130 | dev_dbg(ep->dev->dev, "%s %s %02x !NAK\n", | |
131 | ep->ep.name, where, tmp); | |
132 | net2272_ep_write(ep, EP_RSPSET, 1 << ALT_NAK_OUT_PACKETS); | |
133 | } | |
134 | } | |
135 | #define ASSERT_OUT_NAKING(ep) assert_out_naking(ep, __func__) | |
136 | ||
137 | static void stop_out_naking(struct net2272_ep *ep) | |
138 | { | |
139 | u8 tmp = net2272_ep_read(ep, EP_STAT0); | |
140 | ||
141 | if ((tmp & (1 << NAK_OUT_PACKETS)) != 0) | |
142 | net2272_ep_write(ep, EP_RSPCLR, 1 << ALT_NAK_OUT_PACKETS); | |
143 | } | |
144 | ||
145 | #define PIPEDIR(bAddress) (usb_pipein(bAddress) ? "in" : "out") | |
146 | ||
147 | static char *type_string(u8 bmAttributes) | |
148 | { | |
149 | switch ((bmAttributes) & USB_ENDPOINT_XFERTYPE_MASK) { | |
150 | case USB_ENDPOINT_XFER_BULK: return "bulk"; | |
151 | case USB_ENDPOINT_XFER_ISOC: return "iso"; | |
152 | case USB_ENDPOINT_XFER_INT: return "intr"; | |
153 | default: return "control"; | |
154 | } | |
155 | } | |
156 | ||
157 | static char *buf_state_string(unsigned state) | |
158 | { | |
159 | switch (state) { | |
160 | case BUFF_FREE: return "free"; | |
161 | case BUFF_VALID: return "valid"; | |
162 | case BUFF_LCL: return "local"; | |
163 | case BUFF_USB: return "usb"; | |
164 | default: return "unknown"; | |
165 | } | |
166 | } | |
167 | ||
168 | static char *dma_mode_string(void) | |
169 | { | |
170 | if (!use_dma) | |
171 | return "PIO"; | |
172 | switch (dma_mode) { | |
173 | case 0: return "SLOW DREQ"; | |
174 | case 1: return "FAST DREQ"; | |
175 | case 2: return "BURST"; | |
176 | default: return "invalid"; | |
177 | } | |
178 | } | |
179 | ||
180 | static void net2272_dequeue_all(struct net2272_ep *); | |
181 | static int net2272_kick_dma(struct net2272_ep *, struct net2272_request *); | |
182 | static int net2272_fifo_status(struct usb_ep *); | |
183 | ||
184 | static struct usb_ep_ops net2272_ep_ops; | |
185 | ||
186 | /*---------------------------------------------------------------------------*/ | |
187 | ||
188 | static int | |
189 | net2272_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) | |
190 | { | |
191 | struct net2272 *dev; | |
192 | struct net2272_ep *ep; | |
193 | u32 max; | |
194 | u8 tmp; | |
195 | unsigned long flags; | |
196 | ||
197 | ep = container_of(_ep, struct net2272_ep, ep); | |
198 | if (!_ep || !desc || ep->desc || _ep->name == ep0name | |
199 | || desc->bDescriptorType != USB_DT_ENDPOINT) | |
200 | return -EINVAL; | |
201 | dev = ep->dev; | |
202 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) | |
203 | return -ESHUTDOWN; | |
204 | ||
29cc8897 | 205 | max = usb_endpoint_maxp(desc) & 0x1fff; |
ceb80363 SL |
206 | |
207 | spin_lock_irqsave(&dev->lock, flags); | |
208 | _ep->maxpacket = max & 0x7fff; | |
209 | ep->desc = desc; | |
210 | ||
211 | /* net2272_ep_reset() has already been called */ | |
212 | ep->stopped = 0; | |
213 | ep->wedged = 0; | |
214 | ||
215 | /* set speed-dependent max packet */ | |
216 | net2272_ep_write(ep, EP_MAXPKT0, max & 0xff); | |
217 | net2272_ep_write(ep, EP_MAXPKT1, (max & 0xff00) >> 8); | |
218 | ||
219 | /* set type, direction, address; reset fifo counters */ | |
220 | net2272_ep_write(ep, EP_STAT1, 1 << BUFFER_FLUSH); | |
221 | tmp = usb_endpoint_type(desc); | |
222 | if (usb_endpoint_xfer_bulk(desc)) { | |
223 | /* catch some particularly blatant driver bugs */ | |
224 | if ((dev->gadget.speed == USB_SPEED_HIGH && max != 512) || | |
225 | (dev->gadget.speed == USB_SPEED_FULL && max > 64)) { | |
226 | spin_unlock_irqrestore(&dev->lock, flags); | |
227 | return -ERANGE; | |
228 | } | |
229 | } | |
230 | ep->is_iso = usb_endpoint_xfer_isoc(desc) ? 1 : 0; | |
231 | tmp <<= ENDPOINT_TYPE; | |
232 | tmp |= ((desc->bEndpointAddress & 0x0f) << ENDPOINT_NUMBER); | |
233 | tmp |= usb_endpoint_dir_in(desc) << ENDPOINT_DIRECTION; | |
234 | tmp |= (1 << ENDPOINT_ENABLE); | |
235 | ||
236 | /* for OUT transfers, block the rx fifo until a read is posted */ | |
237 | ep->is_in = usb_endpoint_dir_in(desc); | |
238 | if (!ep->is_in) | |
239 | net2272_ep_write(ep, EP_RSPSET, 1 << ALT_NAK_OUT_PACKETS); | |
240 | ||
241 | net2272_ep_write(ep, EP_CFG, tmp); | |
242 | ||
243 | /* enable irqs */ | |
244 | tmp = (1 << ep->num) | net2272_read(dev, IRQENB0); | |
245 | net2272_write(dev, IRQENB0, tmp); | |
246 | ||
247 | tmp = (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE) | |
248 | | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE) | |
249 | | net2272_ep_read(ep, EP_IRQENB); | |
250 | net2272_ep_write(ep, EP_IRQENB, tmp); | |
251 | ||
252 | tmp = desc->bEndpointAddress; | |
253 | dev_dbg(dev->dev, "enabled %s (ep%d%s-%s) max %04x cfg %02x\n", | |
254 | _ep->name, tmp & 0x0f, PIPEDIR(tmp), | |
255 | type_string(desc->bmAttributes), max, | |
256 | net2272_ep_read(ep, EP_CFG)); | |
257 | ||
258 | spin_unlock_irqrestore(&dev->lock, flags); | |
259 | return 0; | |
260 | } | |
261 | ||
262 | static void net2272_ep_reset(struct net2272_ep *ep) | |
263 | { | |
264 | u8 tmp; | |
265 | ||
266 | ep->desc = NULL; | |
267 | INIT_LIST_HEAD(&ep->queue); | |
268 | ||
e117e742 | 269 | usb_ep_set_maxpacket_limit(&ep->ep, ~0); |
ceb80363 SL |
270 | ep->ep.ops = &net2272_ep_ops; |
271 | ||
272 | /* disable irqs, endpoint */ | |
273 | net2272_ep_write(ep, EP_IRQENB, 0); | |
274 | ||
275 | /* init to our chosen defaults, notably so that we NAK OUT | |
276 | * packets until the driver queues a read. | |
277 | */ | |
278 | tmp = (1 << NAK_OUT_PACKETS_MODE) | (1 << ALT_NAK_OUT_PACKETS); | |
279 | net2272_ep_write(ep, EP_RSPSET, tmp); | |
280 | ||
281 | tmp = (1 << INTERRUPT_MODE) | (1 << HIDE_STATUS_PHASE); | |
282 | if (ep->num != 0) | |
283 | tmp |= (1 << ENDPOINT_TOGGLE) | (1 << ENDPOINT_HALT); | |
284 | ||
285 | net2272_ep_write(ep, EP_RSPCLR, tmp); | |
286 | ||
287 | /* scrub most status bits, and flush any fifo state */ | |
288 | net2272_ep_write(ep, EP_STAT0, | |
289 | (1 << DATA_IN_TOKEN_INTERRUPT) | |
290 | | (1 << DATA_OUT_TOKEN_INTERRUPT) | |
291 | | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT) | |
292 | | (1 << DATA_PACKET_RECEIVED_INTERRUPT) | |
293 | | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)); | |
294 | ||
295 | net2272_ep_write(ep, EP_STAT1, | |
296 | (1 << TIMEOUT) | |
297 | | (1 << USB_OUT_ACK_SENT) | |
298 | | (1 << USB_OUT_NAK_SENT) | |
299 | | (1 << USB_IN_ACK_RCVD) | |
300 | | (1 << USB_IN_NAK_SENT) | |
301 | | (1 << USB_STALL_SENT) | |
302 | | (1 << LOCAL_OUT_ZLP) | |
303 | | (1 << BUFFER_FLUSH)); | |
304 | ||
305 | /* fifo size is handled seperately */ | |
306 | } | |
307 | ||
308 | static int net2272_disable(struct usb_ep *_ep) | |
309 | { | |
310 | struct net2272_ep *ep; | |
311 | unsigned long flags; | |
312 | ||
313 | ep = container_of(_ep, struct net2272_ep, ep); | |
314 | if (!_ep || !ep->desc || _ep->name == ep0name) | |
315 | return -EINVAL; | |
316 | ||
317 | spin_lock_irqsave(&ep->dev->lock, flags); | |
318 | net2272_dequeue_all(ep); | |
319 | net2272_ep_reset(ep); | |
320 | ||
321 | dev_vdbg(ep->dev->dev, "disabled %s\n", _ep->name); | |
322 | ||
323 | spin_unlock_irqrestore(&ep->dev->lock, flags); | |
324 | return 0; | |
325 | } | |
326 | ||
327 | /*---------------------------------------------------------------------------*/ | |
328 | ||
329 | static struct usb_request * | |
330 | net2272_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) | |
331 | { | |
332 | struct net2272_ep *ep; | |
333 | struct net2272_request *req; | |
334 | ||
335 | if (!_ep) | |
336 | return NULL; | |
337 | ep = container_of(_ep, struct net2272_ep, ep); | |
338 | ||
339 | req = kzalloc(sizeof(*req), gfp_flags); | |
340 | if (!req) | |
341 | return NULL; | |
342 | ||
ceb80363 SL |
343 | INIT_LIST_HEAD(&req->queue); |
344 | ||
345 | return &req->req; | |
346 | } | |
347 | ||
348 | static void | |
349 | net2272_free_request(struct usb_ep *_ep, struct usb_request *_req) | |
350 | { | |
351 | struct net2272_ep *ep; | |
352 | struct net2272_request *req; | |
353 | ||
354 | ep = container_of(_ep, struct net2272_ep, ep); | |
355 | if (!_ep || !_req) | |
356 | return; | |
357 | ||
358 | req = container_of(_req, struct net2272_request, req); | |
359 | WARN_ON(!list_empty(&req->queue)); | |
360 | kfree(req); | |
361 | } | |
362 | ||
363 | static void | |
364 | net2272_done(struct net2272_ep *ep, struct net2272_request *req, int status) | |
365 | { | |
366 | struct net2272 *dev; | |
367 | unsigned stopped = ep->stopped; | |
368 | ||
369 | if (ep->num == 0) { | |
370 | if (ep->dev->protocol_stall) { | |
371 | ep->stopped = 1; | |
372 | set_halt(ep); | |
373 | } | |
374 | allow_status(ep); | |
375 | } | |
376 | ||
377 | list_del_init(&req->queue); | |
378 | ||
379 | if (req->req.status == -EINPROGRESS) | |
380 | req->req.status = status; | |
381 | else | |
382 | status = req->req.status; | |
383 | ||
384 | dev = ep->dev; | |
af93f2c7 FB |
385 | if (use_dma && ep->dma) |
386 | usb_gadget_unmap_request(&dev->gadget, &req->req, | |
387 | ep->is_in); | |
ceb80363 SL |
388 | |
389 | if (status && status != -ESHUTDOWN) | |
390 | dev_vdbg(dev->dev, "complete %s req %p stat %d len %u/%u buf %p\n", | |
391 | ep->ep.name, &req->req, status, | |
392 | req->req.actual, req->req.length, req->req.buf); | |
393 | ||
394 | /* don't modify queue heads during completion callback */ | |
395 | ep->stopped = 1; | |
396 | spin_unlock(&dev->lock); | |
304f7e5e | 397 | usb_gadget_giveback_request(&ep->ep, &req->req); |
ceb80363 SL |
398 | spin_lock(&dev->lock); |
399 | ep->stopped = stopped; | |
400 | } | |
401 | ||
402 | static int | |
403 | net2272_write_packet(struct net2272_ep *ep, u8 *buf, | |
404 | struct net2272_request *req, unsigned max) | |
405 | { | |
406 | u16 __iomem *ep_data = net2272_reg_addr(ep->dev, EP_DATA); | |
407 | u16 *bufp; | |
408 | unsigned length, count; | |
409 | u8 tmp; | |
410 | ||
411 | length = min(req->req.length - req->req.actual, max); | |
412 | req->req.actual += length; | |
413 | ||
414 | dev_vdbg(ep->dev->dev, "write packet %s req %p max %u len %u avail %u\n", | |
415 | ep->ep.name, req, max, length, | |
416 | (net2272_ep_read(ep, EP_AVAIL1) << 8) | net2272_ep_read(ep, EP_AVAIL0)); | |
417 | ||
418 | count = length; | |
419 | bufp = (u16 *)buf; | |
420 | ||
421 | while (likely(count >= 2)) { | |
422 | /* no byte-swap required; chip endian set during init */ | |
423 | writew(*bufp++, ep_data); | |
424 | count -= 2; | |
425 | } | |
426 | buf = (u8 *)bufp; | |
427 | ||
428 | /* write final byte by placing the NET2272 into 8-bit mode */ | |
429 | if (unlikely(count)) { | |
430 | tmp = net2272_read(ep->dev, LOCCTL); | |
431 | net2272_write(ep->dev, LOCCTL, tmp & ~(1 << DATA_WIDTH)); | |
432 | writeb(*buf, ep_data); | |
433 | net2272_write(ep->dev, LOCCTL, tmp); | |
434 | } | |
435 | return length; | |
436 | } | |
437 | ||
438 | /* returns: 0: still running, 1: completed, negative: errno */ | |
439 | static int | |
440 | net2272_write_fifo(struct net2272_ep *ep, struct net2272_request *req) | |
441 | { | |
442 | u8 *buf; | |
443 | unsigned count, max; | |
444 | int status; | |
445 | ||
446 | dev_vdbg(ep->dev->dev, "write_fifo %s actual %d len %d\n", | |
447 | ep->ep.name, req->req.actual, req->req.length); | |
448 | ||
449 | /* | |
450 | * Keep loading the endpoint until the final packet is loaded, | |
451 | * or the endpoint buffer is full. | |
452 | */ | |
453 | top: | |
454 | /* | |
455 | * Clear interrupt status | |
456 | * - Packet Transmitted interrupt will become set again when the | |
457 | * host successfully takes another packet | |
458 | */ | |
459 | net2272_ep_write(ep, EP_STAT0, (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)); | |
460 | while (!(net2272_ep_read(ep, EP_STAT0) & (1 << BUFFER_FULL))) { | |
461 | buf = req->req.buf + req->req.actual; | |
462 | prefetch(buf); | |
463 | ||
464 | /* force pagesel */ | |
465 | net2272_ep_read(ep, EP_STAT0); | |
466 | ||
467 | max = (net2272_ep_read(ep, EP_AVAIL1) << 8) | | |
468 | (net2272_ep_read(ep, EP_AVAIL0)); | |
469 | ||
470 | if (max < ep->ep.maxpacket) | |
471 | max = (net2272_ep_read(ep, EP_AVAIL1) << 8) | |
472 | | (net2272_ep_read(ep, EP_AVAIL0)); | |
473 | ||
474 | count = net2272_write_packet(ep, buf, req, max); | |
475 | /* see if we are done */ | |
476 | if (req->req.length == req->req.actual) { | |
477 | /* validate short or zlp packet */ | |
478 | if (count < ep->ep.maxpacket) | |
479 | set_fifo_bytecount(ep, 0); | |
480 | net2272_done(ep, req, 0); | |
481 | ||
482 | if (!list_empty(&ep->queue)) { | |
483 | req = list_entry(ep->queue.next, | |
484 | struct net2272_request, | |
485 | queue); | |
486 | status = net2272_kick_dma(ep, req); | |
487 | ||
488 | if (status < 0) | |
489 | if ((net2272_ep_read(ep, EP_STAT0) | |
490 | & (1 << BUFFER_EMPTY))) | |
491 | goto top; | |
492 | } | |
493 | return 1; | |
494 | } | |
495 | net2272_ep_write(ep, EP_STAT0, (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)); | |
496 | } | |
497 | return 0; | |
498 | } | |
499 | ||
500 | static void | |
501 | net2272_out_flush(struct net2272_ep *ep) | |
502 | { | |
503 | ASSERT_OUT_NAKING(ep); | |
504 | ||
505 | net2272_ep_write(ep, EP_STAT0, (1 << DATA_OUT_TOKEN_INTERRUPT) | |
506 | | (1 << DATA_PACKET_RECEIVED_INTERRUPT)); | |
507 | net2272_ep_write(ep, EP_STAT1, 1 << BUFFER_FLUSH); | |
508 | } | |
509 | ||
510 | static int | |
511 | net2272_read_packet(struct net2272_ep *ep, u8 *buf, | |
512 | struct net2272_request *req, unsigned avail) | |
513 | { | |
514 | u16 __iomem *ep_data = net2272_reg_addr(ep->dev, EP_DATA); | |
515 | unsigned is_short; | |
516 | u16 *bufp; | |
517 | ||
518 | req->req.actual += avail; | |
519 | ||
520 | dev_vdbg(ep->dev->dev, "read packet %s req %p len %u avail %u\n", | |
521 | ep->ep.name, req, avail, | |
522 | (net2272_ep_read(ep, EP_AVAIL1) << 8) | net2272_ep_read(ep, EP_AVAIL0)); | |
523 | ||
524 | is_short = (avail < ep->ep.maxpacket); | |
525 | ||
526 | if (unlikely(avail == 0)) { | |
527 | /* remove any zlp from the buffer */ | |
528 | (void)readw(ep_data); | |
529 | return is_short; | |
530 | } | |
531 | ||
532 | /* Ensure we get the final byte */ | |
533 | if (unlikely(avail % 2)) | |
534 | avail++; | |
535 | bufp = (u16 *)buf; | |
536 | ||
537 | do { | |
538 | *bufp++ = readw(ep_data); | |
539 | avail -= 2; | |
540 | } while (avail); | |
541 | ||
542 | /* | |
543 | * To avoid false endpoint available race condition must read | |
544 | * ep stat0 twice in the case of a short transfer | |
545 | */ | |
546 | if (net2272_ep_read(ep, EP_STAT0) & (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)) | |
547 | net2272_ep_read(ep, EP_STAT0); | |
548 | ||
549 | return is_short; | |
550 | } | |
551 | ||
552 | static int | |
553 | net2272_read_fifo(struct net2272_ep *ep, struct net2272_request *req) | |
554 | { | |
555 | u8 *buf; | |
556 | unsigned is_short; | |
557 | int count; | |
558 | int tmp; | |
559 | int cleanup = 0; | |
560 | int status = -1; | |
561 | ||
562 | dev_vdbg(ep->dev->dev, "read_fifo %s actual %d len %d\n", | |
563 | ep->ep.name, req->req.actual, req->req.length); | |
564 | ||
565 | top: | |
566 | do { | |
567 | buf = req->req.buf + req->req.actual; | |
568 | prefetchw(buf); | |
569 | ||
570 | count = (net2272_ep_read(ep, EP_AVAIL1) << 8) | |
571 | | net2272_ep_read(ep, EP_AVAIL0); | |
572 | ||
573 | net2272_ep_write(ep, EP_STAT0, | |
574 | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT) | | |
575 | (1 << DATA_PACKET_RECEIVED_INTERRUPT)); | |
576 | ||
577 | tmp = req->req.length - req->req.actual; | |
578 | ||
579 | if (count > tmp) { | |
580 | if ((tmp % ep->ep.maxpacket) != 0) { | |
581 | dev_err(ep->dev->dev, | |
582 | "%s out fifo %d bytes, expected %d\n", | |
583 | ep->ep.name, count, tmp); | |
584 | cleanup = 1; | |
585 | } | |
586 | count = (tmp > 0) ? tmp : 0; | |
587 | } | |
588 | ||
589 | is_short = net2272_read_packet(ep, buf, req, count); | |
590 | ||
591 | /* completion */ | |
592 | if (unlikely(cleanup || is_short || | |
593 | ((req->req.actual == req->req.length) | |
594 | && !req->req.zero))) { | |
595 | ||
596 | if (cleanup) { | |
597 | net2272_out_flush(ep); | |
598 | net2272_done(ep, req, -EOVERFLOW); | |
599 | } else | |
600 | net2272_done(ep, req, 0); | |
601 | ||
602 | /* re-initialize endpoint transfer registers | |
603 | * otherwise they may result in erroneous pre-validation | |
604 | * for subsequent control reads | |
605 | */ | |
606 | if (unlikely(ep->num == 0)) { | |
607 | net2272_ep_write(ep, EP_TRANSFER2, 0); | |
608 | net2272_ep_write(ep, EP_TRANSFER1, 0); | |
609 | net2272_ep_write(ep, EP_TRANSFER0, 0); | |
610 | } | |
611 | ||
612 | if (!list_empty(&ep->queue)) { | |
613 | req = list_entry(ep->queue.next, | |
614 | struct net2272_request, queue); | |
615 | status = net2272_kick_dma(ep, req); | |
616 | if ((status < 0) && | |
617 | !(net2272_ep_read(ep, EP_STAT0) & (1 << BUFFER_EMPTY))) | |
618 | goto top; | |
619 | } | |
620 | return 1; | |
621 | } | |
622 | } while (!(net2272_ep_read(ep, EP_STAT0) & (1 << BUFFER_EMPTY))); | |
623 | ||
624 | return 0; | |
625 | } | |
626 | ||
627 | static void | |
628 | net2272_pio_advance(struct net2272_ep *ep) | |
629 | { | |
630 | struct net2272_request *req; | |
631 | ||
632 | if (unlikely(list_empty(&ep->queue))) | |
633 | return; | |
634 | ||
635 | req = list_entry(ep->queue.next, struct net2272_request, queue); | |
636 | (ep->is_in ? net2272_write_fifo : net2272_read_fifo)(ep, req); | |
637 | } | |
638 | ||
639 | /* returns 0 on success, else negative errno */ | |
640 | static int | |
641 | net2272_request_dma(struct net2272 *dev, unsigned ep, u32 buf, | |
642 | unsigned len, unsigned dir) | |
643 | { | |
644 | dev_vdbg(dev->dev, "request_dma ep %d buf %08x len %d dir %d\n", | |
645 | ep, buf, len, dir); | |
646 | ||
647 | /* The NET2272 only supports a single dma channel */ | |
648 | if (dev->dma_busy) | |
649 | return -EBUSY; | |
650 | /* | |
651 | * EP_TRANSFER (used to determine the number of bytes received | |
652 | * in an OUT transfer) is 24 bits wide; don't ask for more than that. | |
653 | */ | |
654 | if ((dir == 1) && (len > 0x1000000)) | |
655 | return -EINVAL; | |
656 | ||
657 | dev->dma_busy = 1; | |
658 | ||
659 | /* initialize platform's dma */ | |
660 | #ifdef CONFIG_PCI | |
661 | /* NET2272 addr, buffer addr, length, etc. */ | |
662 | switch (dev->dev_id) { | |
663 | case PCI_DEVICE_ID_RDK1: | |
664 | /* Setup PLX 9054 DMA mode */ | |
665 | writel((1 << LOCAL_BUS_WIDTH) | | |
666 | (1 << TA_READY_INPUT_ENABLE) | | |
667 | (0 << LOCAL_BURST_ENABLE) | | |
668 | (1 << DONE_INTERRUPT_ENABLE) | | |
669 | (1 << LOCAL_ADDRESSING_MODE) | | |
670 | (1 << DEMAND_MODE) | | |
671 | (1 << DMA_EOT_ENABLE) | | |
672 | (1 << FAST_SLOW_TERMINATE_MODE_SELECT) | | |
673 | (1 << DMA_CHANNEL_INTERRUPT_SELECT), | |
674 | dev->rdk1.plx9054_base_addr + DMAMODE0); | |
675 | ||
676 | writel(0x100000, dev->rdk1.plx9054_base_addr + DMALADR0); | |
677 | writel(buf, dev->rdk1.plx9054_base_addr + DMAPADR0); | |
678 | writel(len, dev->rdk1.plx9054_base_addr + DMASIZ0); | |
679 | writel((dir << DIRECTION_OF_TRANSFER) | | |
680 | (1 << INTERRUPT_AFTER_TERMINAL_COUNT), | |
681 | dev->rdk1.plx9054_base_addr + DMADPR0); | |
682 | writel((1 << LOCAL_DMA_CHANNEL_0_INTERRUPT_ENABLE) | | |
683 | readl(dev->rdk1.plx9054_base_addr + INTCSR), | |
684 | dev->rdk1.plx9054_base_addr + INTCSR); | |
685 | ||
686 | break; | |
687 | } | |
688 | #endif | |
689 | ||
690 | net2272_write(dev, DMAREQ, | |
691 | (0 << DMA_BUFFER_VALID) | | |
692 | (1 << DMA_REQUEST_ENABLE) | | |
693 | (1 << DMA_CONTROL_DACK) | | |
694 | (dev->dma_eot_polarity << EOT_POLARITY) | | |
695 | (dev->dma_dack_polarity << DACK_POLARITY) | | |
696 | (dev->dma_dreq_polarity << DREQ_POLARITY) | | |
697 | ((ep >> 1) << DMA_ENDPOINT_SELECT)); | |
698 | ||
699 | (void) net2272_read(dev, SCRATCH); | |
700 | ||
701 | return 0; | |
702 | } | |
703 | ||
704 | static void | |
705 | net2272_start_dma(struct net2272 *dev) | |
706 | { | |
707 | /* start platform's dma controller */ | |
708 | #ifdef CONFIG_PCI | |
709 | switch (dev->dev_id) { | |
710 | case PCI_DEVICE_ID_RDK1: | |
711 | writeb((1 << CHANNEL_ENABLE) | (1 << CHANNEL_START), | |
712 | dev->rdk1.plx9054_base_addr + DMACSR0); | |
713 | break; | |
714 | } | |
715 | #endif | |
716 | } | |
717 | ||
718 | /* returns 0 on success, else negative errno */ | |
719 | static int | |
720 | net2272_kick_dma(struct net2272_ep *ep, struct net2272_request *req) | |
721 | { | |
722 | unsigned size; | |
723 | u8 tmp; | |
724 | ||
725 | if (!use_dma || (ep->num < 1) || (ep->num > 2) || !ep->dma) | |
726 | return -EINVAL; | |
727 | ||
728 | /* don't use dma for odd-length transfers | |
729 | * otherwise, we'd need to deal with the last byte with pio | |
730 | */ | |
731 | if (req->req.length & 1) | |
732 | return -EINVAL; | |
733 | ||
7b30d19a FB |
734 | dev_vdbg(ep->dev->dev, "kick_dma %s req %p dma %08llx\n", |
735 | ep->ep.name, req, (unsigned long long) req->req.dma); | |
ceb80363 SL |
736 | |
737 | net2272_ep_write(ep, EP_RSPSET, 1 << ALT_NAK_OUT_PACKETS); | |
738 | ||
739 | /* The NET2272 can only use DMA on one endpoint at a time */ | |
740 | if (ep->dev->dma_busy) | |
741 | return -EBUSY; | |
742 | ||
743 | /* Make sure we only DMA an even number of bytes (we'll use | |
744 | * pio to complete the transfer) | |
745 | */ | |
746 | size = req->req.length; | |
747 | size &= ~1; | |
748 | ||
749 | /* device-to-host transfer */ | |
750 | if (ep->is_in) { | |
751 | /* initialize platform's dma controller */ | |
752 | if (net2272_request_dma(ep->dev, ep->num, req->req.dma, size, 0)) | |
753 | /* unable to obtain DMA channel; return error and use pio mode */ | |
754 | return -EBUSY; | |
755 | req->req.actual += size; | |
756 | ||
757 | /* host-to-device transfer */ | |
758 | } else { | |
759 | tmp = net2272_ep_read(ep, EP_STAT0); | |
760 | ||
761 | /* initialize platform's dma controller */ | |
762 | if (net2272_request_dma(ep->dev, ep->num, req->req.dma, size, 1)) | |
763 | /* unable to obtain DMA channel; return error and use pio mode */ | |
764 | return -EBUSY; | |
765 | ||
766 | if (!(tmp & (1 << BUFFER_EMPTY))) | |
767 | ep->not_empty = 1; | |
768 | else | |
769 | ep->not_empty = 0; | |
770 | ||
771 | ||
772 | /* allow the endpoint's buffer to fill */ | |
773 | net2272_ep_write(ep, EP_RSPCLR, 1 << ALT_NAK_OUT_PACKETS); | |
774 | ||
775 | /* this transfer completed and data's already in the fifo | |
776 | * return error so pio gets used. | |
777 | */ | |
778 | if (tmp & (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)) { | |
779 | ||
780 | /* deassert dreq */ | |
781 | net2272_write(ep->dev, DMAREQ, | |
782 | (0 << DMA_BUFFER_VALID) | | |
783 | (0 << DMA_REQUEST_ENABLE) | | |
784 | (1 << DMA_CONTROL_DACK) | | |
785 | (ep->dev->dma_eot_polarity << EOT_POLARITY) | | |
786 | (ep->dev->dma_dack_polarity << DACK_POLARITY) | | |
787 | (ep->dev->dma_dreq_polarity << DREQ_POLARITY) | | |
788 | ((ep->num >> 1) << DMA_ENDPOINT_SELECT)); | |
789 | ||
790 | return -EBUSY; | |
791 | } | |
792 | } | |
793 | ||
794 | /* Don't use per-packet interrupts: use dma interrupts only */ | |
795 | net2272_ep_write(ep, EP_IRQENB, 0); | |
796 | ||
797 | net2272_start_dma(ep->dev); | |
798 | ||
799 | return 0; | |
800 | } | |
801 | ||
802 | static void net2272_cancel_dma(struct net2272 *dev) | |
803 | { | |
804 | #ifdef CONFIG_PCI | |
805 | switch (dev->dev_id) { | |
806 | case PCI_DEVICE_ID_RDK1: | |
807 | writeb(0, dev->rdk1.plx9054_base_addr + DMACSR0); | |
808 | writeb(1 << CHANNEL_ABORT, dev->rdk1.plx9054_base_addr + DMACSR0); | |
809 | while (!(readb(dev->rdk1.plx9054_base_addr + DMACSR0) & | |
810 | (1 << CHANNEL_DONE))) | |
811 | continue; /* wait for dma to stabalize */ | |
812 | ||
813 | /* dma abort generates an interrupt */ | |
814 | writeb(1 << CHANNEL_CLEAR_INTERRUPT, | |
815 | dev->rdk1.plx9054_base_addr + DMACSR0); | |
816 | break; | |
817 | } | |
818 | #endif | |
819 | ||
820 | dev->dma_busy = 0; | |
821 | } | |
822 | ||
823 | /*---------------------------------------------------------------------------*/ | |
824 | ||
825 | static int | |
826 | net2272_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) | |
827 | { | |
828 | struct net2272_request *req; | |
829 | struct net2272_ep *ep; | |
830 | struct net2272 *dev; | |
831 | unsigned long flags; | |
832 | int status = -1; | |
833 | u8 s; | |
834 | ||
835 | req = container_of(_req, struct net2272_request, req); | |
836 | if (!_req || !_req->complete || !_req->buf | |
837 | || !list_empty(&req->queue)) | |
838 | return -EINVAL; | |
839 | ep = container_of(_ep, struct net2272_ep, ep); | |
840 | if (!_ep || (!ep->desc && ep->num != 0)) | |
841 | return -EINVAL; | |
842 | dev = ep->dev; | |
843 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) | |
844 | return -ESHUTDOWN; | |
845 | ||
846 | /* set up dma mapping in case the caller didn't */ | |
af93f2c7 FB |
847 | if (use_dma && ep->dma) { |
848 | status = usb_gadget_map_request(&dev->gadget, _req, | |
849 | ep->is_in); | |
850 | if (status) | |
851 | return status; | |
ceb80363 SL |
852 | } |
853 | ||
7b30d19a | 854 | dev_vdbg(dev->dev, "%s queue req %p, len %d buf %p dma %08llx %s\n", |
ceb80363 | 855 | _ep->name, _req, _req->length, _req->buf, |
7b30d19a | 856 | (unsigned long long) _req->dma, _req->zero ? "zero" : "!zero"); |
ceb80363 SL |
857 | |
858 | spin_lock_irqsave(&dev->lock, flags); | |
859 | ||
860 | _req->status = -EINPROGRESS; | |
861 | _req->actual = 0; | |
862 | ||
863 | /* kickstart this i/o queue? */ | |
864 | if (list_empty(&ep->queue) && !ep->stopped) { | |
865 | /* maybe there's no control data, just status ack */ | |
866 | if (ep->num == 0 && _req->length == 0) { | |
867 | net2272_done(ep, req, 0); | |
868 | dev_vdbg(dev->dev, "%s status ack\n", ep->ep.name); | |
869 | goto done; | |
870 | } | |
871 | ||
872 | /* Return zlp, don't let it block subsequent packets */ | |
873 | s = net2272_ep_read(ep, EP_STAT0); | |
874 | if (s & (1 << BUFFER_EMPTY)) { | |
875 | /* Buffer is empty check for a blocking zlp, handle it */ | |
876 | if ((s & (1 << NAK_OUT_PACKETS)) && | |
877 | net2272_ep_read(ep, EP_STAT1) & (1 << LOCAL_OUT_ZLP)) { | |
878 | dev_dbg(dev->dev, "WARNING: returning ZLP short packet termination!\n"); | |
879 | /* | |
880 | * Request is going to terminate with a short packet ... | |
881 | * hope the client is ready for it! | |
882 | */ | |
883 | status = net2272_read_fifo(ep, req); | |
884 | /* clear short packet naking */ | |
885 | net2272_ep_write(ep, EP_STAT0, (1 << NAK_OUT_PACKETS)); | |
886 | goto done; | |
887 | } | |
888 | } | |
889 | ||
890 | /* try dma first */ | |
891 | status = net2272_kick_dma(ep, req); | |
892 | ||
893 | if (status < 0) { | |
894 | /* dma failed (most likely in use by another endpoint) | |
895 | * fallback to pio | |
896 | */ | |
897 | status = 0; | |
898 | ||
899 | if (ep->is_in) | |
900 | status = net2272_write_fifo(ep, req); | |
901 | else { | |
902 | s = net2272_ep_read(ep, EP_STAT0); | |
903 | if ((s & (1 << BUFFER_EMPTY)) == 0) | |
904 | status = net2272_read_fifo(ep, req); | |
905 | } | |
906 | ||
907 | if (unlikely(status != 0)) { | |
908 | if (status > 0) | |
909 | status = 0; | |
910 | req = NULL; | |
911 | } | |
912 | } | |
913 | } | |
69147121 | 914 | if (likely(req)) |
ceb80363 SL |
915 | list_add_tail(&req->queue, &ep->queue); |
916 | ||
917 | if (likely(!list_empty(&ep->queue))) | |
918 | net2272_ep_write(ep, EP_RSPCLR, 1 << ALT_NAK_OUT_PACKETS); | |
919 | done: | |
920 | spin_unlock_irqrestore(&dev->lock, flags); | |
921 | ||
922 | return 0; | |
923 | } | |
924 | ||
925 | /* dequeue ALL requests */ | |
926 | static void | |
927 | net2272_dequeue_all(struct net2272_ep *ep) | |
928 | { | |
929 | struct net2272_request *req; | |
930 | ||
931 | /* called with spinlock held */ | |
932 | ep->stopped = 1; | |
933 | ||
934 | while (!list_empty(&ep->queue)) { | |
935 | req = list_entry(ep->queue.next, | |
936 | struct net2272_request, | |
937 | queue); | |
938 | net2272_done(ep, req, -ESHUTDOWN); | |
939 | } | |
940 | } | |
941 | ||
942 | /* dequeue JUST ONE request */ | |
943 | static int | |
944 | net2272_dequeue(struct usb_ep *_ep, struct usb_request *_req) | |
945 | { | |
946 | struct net2272_ep *ep; | |
947 | struct net2272_request *req; | |
948 | unsigned long flags; | |
949 | int stopped; | |
950 | ||
951 | ep = container_of(_ep, struct net2272_ep, ep); | |
952 | if (!_ep || (!ep->desc && ep->num != 0) || !_req) | |
953 | return -EINVAL; | |
954 | ||
955 | spin_lock_irqsave(&ep->dev->lock, flags); | |
956 | stopped = ep->stopped; | |
957 | ep->stopped = 1; | |
958 | ||
959 | /* make sure it's still queued on this endpoint */ | |
960 | list_for_each_entry(req, &ep->queue, queue) { | |
961 | if (&req->req == _req) | |
962 | break; | |
963 | } | |
964 | if (&req->req != _req) { | |
965 | spin_unlock_irqrestore(&ep->dev->lock, flags); | |
966 | return -EINVAL; | |
967 | } | |
968 | ||
969 | /* queue head may be partially complete */ | |
970 | if (ep->queue.next == &req->queue) { | |
971 | dev_dbg(ep->dev->dev, "unlink (%s) pio\n", _ep->name); | |
972 | net2272_done(ep, req, -ECONNRESET); | |
973 | } | |
974 | req = NULL; | |
975 | ep->stopped = stopped; | |
976 | ||
977 | spin_unlock_irqrestore(&ep->dev->lock, flags); | |
978 | return 0; | |
979 | } | |
980 | ||
981 | /*---------------------------------------------------------------------------*/ | |
982 | ||
983 | static int | |
984 | net2272_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged) | |
985 | { | |
986 | struct net2272_ep *ep; | |
987 | unsigned long flags; | |
988 | int ret = 0; | |
989 | ||
990 | ep = container_of(_ep, struct net2272_ep, ep); | |
991 | if (!_ep || (!ep->desc && ep->num != 0)) | |
992 | return -EINVAL; | |
993 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) | |
994 | return -ESHUTDOWN; | |
995 | if (ep->desc /* not ep0 */ && usb_endpoint_xfer_isoc(ep->desc)) | |
996 | return -EINVAL; | |
997 | ||
998 | spin_lock_irqsave(&ep->dev->lock, flags); | |
999 | if (!list_empty(&ep->queue)) | |
1000 | ret = -EAGAIN; | |
1001 | else if (ep->is_in && value && net2272_fifo_status(_ep) != 0) | |
1002 | ret = -EAGAIN; | |
1003 | else { | |
1004 | dev_vdbg(ep->dev->dev, "%s %s %s\n", _ep->name, | |
1005 | value ? "set" : "clear", | |
1006 | wedged ? "wedge" : "halt"); | |
1007 | /* set/clear */ | |
1008 | if (value) { | |
1009 | if (ep->num == 0) | |
1010 | ep->dev->protocol_stall = 1; | |
1011 | else | |
1012 | set_halt(ep); | |
1013 | if (wedged) | |
1014 | ep->wedged = 1; | |
1015 | } else { | |
1016 | clear_halt(ep); | |
1017 | ep->wedged = 0; | |
1018 | } | |
1019 | } | |
1020 | spin_unlock_irqrestore(&ep->dev->lock, flags); | |
1021 | ||
1022 | return ret; | |
1023 | } | |
1024 | ||
1025 | static int | |
1026 | net2272_set_halt(struct usb_ep *_ep, int value) | |
1027 | { | |
1028 | return net2272_set_halt_and_wedge(_ep, value, 0); | |
1029 | } | |
1030 | ||
1031 | static int | |
1032 | net2272_set_wedge(struct usb_ep *_ep) | |
1033 | { | |
1034 | if (!_ep || _ep->name == ep0name) | |
1035 | return -EINVAL; | |
1036 | return net2272_set_halt_and_wedge(_ep, 1, 1); | |
1037 | } | |
1038 | ||
1039 | static int | |
1040 | net2272_fifo_status(struct usb_ep *_ep) | |
1041 | { | |
1042 | struct net2272_ep *ep; | |
1043 | u16 avail; | |
1044 | ||
1045 | ep = container_of(_ep, struct net2272_ep, ep); | |
1046 | if (!_ep || (!ep->desc && ep->num != 0)) | |
1047 | return -ENODEV; | |
1048 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1049 | return -ESHUTDOWN; | |
1050 | ||
1051 | avail = net2272_ep_read(ep, EP_AVAIL1) << 8; | |
1052 | avail |= net2272_ep_read(ep, EP_AVAIL0); | |
1053 | if (avail > ep->fifo_size) | |
1054 | return -EOVERFLOW; | |
1055 | if (ep->is_in) | |
1056 | avail = ep->fifo_size - avail; | |
1057 | return avail; | |
1058 | } | |
1059 | ||
1060 | static void | |
1061 | net2272_fifo_flush(struct usb_ep *_ep) | |
1062 | { | |
1063 | struct net2272_ep *ep; | |
1064 | ||
1065 | ep = container_of(_ep, struct net2272_ep, ep); | |
1066 | if (!_ep || (!ep->desc && ep->num != 0)) | |
1067 | return; | |
1068 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1069 | return; | |
1070 | ||
1071 | net2272_ep_write(ep, EP_STAT1, 1 << BUFFER_FLUSH); | |
1072 | } | |
1073 | ||
1074 | static struct usb_ep_ops net2272_ep_ops = { | |
1075 | .enable = net2272_enable, | |
1076 | .disable = net2272_disable, | |
1077 | ||
1078 | .alloc_request = net2272_alloc_request, | |
1079 | .free_request = net2272_free_request, | |
1080 | ||
1081 | .queue = net2272_queue, | |
1082 | .dequeue = net2272_dequeue, | |
1083 | ||
1084 | .set_halt = net2272_set_halt, | |
1085 | .set_wedge = net2272_set_wedge, | |
1086 | .fifo_status = net2272_fifo_status, | |
1087 | .fifo_flush = net2272_fifo_flush, | |
1088 | }; | |
1089 | ||
1090 | /*---------------------------------------------------------------------------*/ | |
1091 | ||
1092 | static int | |
1093 | net2272_get_frame(struct usb_gadget *_gadget) | |
1094 | { | |
1095 | struct net2272 *dev; | |
1096 | unsigned long flags; | |
1097 | u16 ret; | |
1098 | ||
1099 | if (!_gadget) | |
1100 | return -ENODEV; | |
1101 | dev = container_of(_gadget, struct net2272, gadget); | |
1102 | spin_lock_irqsave(&dev->lock, flags); | |
1103 | ||
1104 | ret = net2272_read(dev, FRAME1) << 8; | |
1105 | ret |= net2272_read(dev, FRAME0); | |
1106 | ||
1107 | spin_unlock_irqrestore(&dev->lock, flags); | |
1108 | return ret; | |
1109 | } | |
1110 | ||
1111 | static int | |
1112 | net2272_wakeup(struct usb_gadget *_gadget) | |
1113 | { | |
1114 | struct net2272 *dev; | |
1115 | u8 tmp; | |
1116 | unsigned long flags; | |
1117 | ||
1118 | if (!_gadget) | |
1119 | return 0; | |
1120 | dev = container_of(_gadget, struct net2272, gadget); | |
1121 | ||
1122 | spin_lock_irqsave(&dev->lock, flags); | |
1123 | tmp = net2272_read(dev, USBCTL0); | |
1124 | if (tmp & (1 << IO_WAKEUP_ENABLE)) | |
1125 | net2272_write(dev, USBCTL1, (1 << GENERATE_RESUME)); | |
1126 | ||
1127 | spin_unlock_irqrestore(&dev->lock, flags); | |
1128 | ||
1129 | return 0; | |
1130 | } | |
1131 | ||
1132 | static int | |
1133 | net2272_set_selfpowered(struct usb_gadget *_gadget, int value) | |
1134 | { | |
ceb80363 SL |
1135 | if (!_gadget) |
1136 | return -ENODEV; | |
ceb80363 | 1137 | |
d4a1c479 | 1138 | _gadget->is_selfpowered = (value != 0); |
ceb80363 SL |
1139 | |
1140 | return 0; | |
1141 | } | |
1142 | ||
1143 | static int | |
1144 | net2272_pullup(struct usb_gadget *_gadget, int is_on) | |
1145 | { | |
1146 | struct net2272 *dev; | |
1147 | u8 tmp; | |
1148 | unsigned long flags; | |
1149 | ||
1150 | if (!_gadget) | |
1151 | return -ENODEV; | |
1152 | dev = container_of(_gadget, struct net2272, gadget); | |
1153 | ||
1154 | spin_lock_irqsave(&dev->lock, flags); | |
1155 | tmp = net2272_read(dev, USBCTL0); | |
1156 | dev->softconnect = (is_on != 0); | |
1157 | if (is_on) | |
1158 | tmp |= (1 << USB_DETECT_ENABLE); | |
1159 | else | |
1160 | tmp &= ~(1 << USB_DETECT_ENABLE); | |
1161 | net2272_write(dev, USBCTL0, tmp); | |
1162 | spin_unlock_irqrestore(&dev->lock, flags); | |
1163 | ||
1164 | return 0; | |
1165 | } | |
1166 | ||
96f8db6a FB |
1167 | static int net2272_start(struct usb_gadget *_gadget, |
1168 | struct usb_gadget_driver *driver); | |
22835b80 | 1169 | static int net2272_stop(struct usb_gadget *_gadget); |
0f91349b | 1170 | |
ceb80363 | 1171 | static const struct usb_gadget_ops net2272_ops = { |
96f8db6a FB |
1172 | .get_frame = net2272_get_frame, |
1173 | .wakeup = net2272_wakeup, | |
ceb80363 | 1174 | .set_selfpowered = net2272_set_selfpowered, |
96f8db6a FB |
1175 | .pullup = net2272_pullup, |
1176 | .udc_start = net2272_start, | |
1177 | .udc_stop = net2272_stop, | |
ceb80363 SL |
1178 | }; |
1179 | ||
1180 | /*---------------------------------------------------------------------------*/ | |
1181 | ||
1182 | static ssize_t | |
ce26bd23 | 1183 | registers_show(struct device *_dev, struct device_attribute *attr, char *buf) |
ceb80363 SL |
1184 | { |
1185 | struct net2272 *dev; | |
1186 | char *next; | |
1187 | unsigned size, t; | |
1188 | unsigned long flags; | |
1189 | u8 t1, t2; | |
1190 | int i; | |
1191 | const char *s; | |
1192 | ||
1193 | dev = dev_get_drvdata(_dev); | |
1194 | next = buf; | |
1195 | size = PAGE_SIZE; | |
1196 | spin_lock_irqsave(&dev->lock, flags); | |
1197 | ||
1198 | if (dev->driver) | |
1199 | s = dev->driver->driver.name; | |
1200 | else | |
1201 | s = "(none)"; | |
1202 | ||
1203 | /* Main Control Registers */ | |
1204 | t = scnprintf(next, size, "%s version %s," | |
1205 | "chiprev %02x, locctl %02x\n" | |
1206 | "irqenb0 %02x irqenb1 %02x " | |
1207 | "irqstat0 %02x irqstat1 %02x\n", | |
1208 | driver_name, driver_vers, dev->chiprev, | |
1209 | net2272_read(dev, LOCCTL), | |
1210 | net2272_read(dev, IRQENB0), | |
1211 | net2272_read(dev, IRQENB1), | |
1212 | net2272_read(dev, IRQSTAT0), | |
1213 | net2272_read(dev, IRQSTAT1)); | |
1214 | size -= t; | |
1215 | next += t; | |
1216 | ||
1217 | /* DMA */ | |
1218 | t1 = net2272_read(dev, DMAREQ); | |
1219 | t = scnprintf(next, size, "\ndmareq %02x: %s %s%s%s%s\n", | |
1220 | t1, ep_name[(t1 & 0x01) + 1], | |
1221 | t1 & (1 << DMA_CONTROL_DACK) ? "dack " : "", | |
1222 | t1 & (1 << DMA_REQUEST_ENABLE) ? "reqenb " : "", | |
1223 | t1 & (1 << DMA_REQUEST) ? "req " : "", | |
1224 | t1 & (1 << DMA_BUFFER_VALID) ? "valid " : ""); | |
1225 | size -= t; | |
1226 | next += t; | |
1227 | ||
1228 | /* USB Control Registers */ | |
1229 | t1 = net2272_read(dev, USBCTL1); | |
1230 | if (t1 & (1 << VBUS_PIN)) { | |
1231 | if (t1 & (1 << USB_HIGH_SPEED)) | |
1232 | s = "high speed"; | |
1233 | else if (dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1234 | s = "powered"; | |
1235 | else | |
1236 | s = "full speed"; | |
1237 | } else | |
1238 | s = "not attached"; | |
1239 | t = scnprintf(next, size, | |
1240 | "usbctl0 %02x usbctl1 %02x addr 0x%02x (%s)\n", | |
1241 | net2272_read(dev, USBCTL0), t1, | |
1242 | net2272_read(dev, OURADDR), s); | |
1243 | size -= t; | |
1244 | next += t; | |
1245 | ||
1246 | /* Endpoint Registers */ | |
1247 | for (i = 0; i < 4; ++i) { | |
1248 | struct net2272_ep *ep; | |
1249 | ||
1250 | ep = &dev->ep[i]; | |
1251 | if (i && !ep->desc) | |
1252 | continue; | |
1253 | ||
1254 | t1 = net2272_ep_read(ep, EP_CFG); | |
1255 | t2 = net2272_ep_read(ep, EP_RSPSET); | |
1256 | t = scnprintf(next, size, | |
1257 | "\n%s\tcfg %02x rsp (%02x) %s%s%s%s%s%s%s%s" | |
1258 | "irqenb %02x\n", | |
1259 | ep->ep.name, t1, t2, | |
1260 | (t2 & (1 << ALT_NAK_OUT_PACKETS)) ? "NAK " : "", | |
1261 | (t2 & (1 << HIDE_STATUS_PHASE)) ? "hide " : "", | |
1262 | (t2 & (1 << AUTOVALIDATE)) ? "auto " : "", | |
1263 | (t2 & (1 << INTERRUPT_MODE)) ? "interrupt " : "", | |
1264 | (t2 & (1 << CONTROL_STATUS_PHASE_HANDSHAKE)) ? "status " : "", | |
1265 | (t2 & (1 << NAK_OUT_PACKETS_MODE)) ? "NAKmode " : "", | |
1266 | (t2 & (1 << ENDPOINT_TOGGLE)) ? "DATA1 " : "DATA0 ", | |
1267 | (t2 & (1 << ENDPOINT_HALT)) ? "HALT " : "", | |
1268 | net2272_ep_read(ep, EP_IRQENB)); | |
1269 | size -= t; | |
1270 | next += t; | |
1271 | ||
1272 | t = scnprintf(next, size, | |
1273 | "\tstat0 %02x stat1 %02x avail %04x " | |
1274 | "(ep%d%s-%s)%s\n", | |
1275 | net2272_ep_read(ep, EP_STAT0), | |
1276 | net2272_ep_read(ep, EP_STAT1), | |
1277 | (net2272_ep_read(ep, EP_AVAIL1) << 8) | net2272_ep_read(ep, EP_AVAIL0), | |
1278 | t1 & 0x0f, | |
1279 | ep->is_in ? "in" : "out", | |
1280 | type_string(t1 >> 5), | |
1281 | ep->stopped ? "*" : ""); | |
1282 | size -= t; | |
1283 | next += t; | |
1284 | ||
1285 | t = scnprintf(next, size, | |
1286 | "\tep_transfer %06x\n", | |
1287 | ((net2272_ep_read(ep, EP_TRANSFER2) & 0xff) << 16) | | |
1288 | ((net2272_ep_read(ep, EP_TRANSFER1) & 0xff) << 8) | | |
1289 | ((net2272_ep_read(ep, EP_TRANSFER0) & 0xff))); | |
1290 | size -= t; | |
1291 | next += t; | |
1292 | ||
1293 | t1 = net2272_ep_read(ep, EP_BUFF_STATES) & 0x03; | |
1294 | t2 = (net2272_ep_read(ep, EP_BUFF_STATES) >> 2) & 0x03; | |
1295 | t = scnprintf(next, size, | |
1296 | "\tbuf-a %s buf-b %s\n", | |
1297 | buf_state_string(t1), | |
1298 | buf_state_string(t2)); | |
1299 | size -= t; | |
1300 | next += t; | |
1301 | } | |
1302 | ||
1303 | spin_unlock_irqrestore(&dev->lock, flags); | |
1304 | ||
1305 | return PAGE_SIZE - size; | |
1306 | } | |
ce26bd23 | 1307 | static DEVICE_ATTR_RO(registers); |
ceb80363 SL |
1308 | |
1309 | /*---------------------------------------------------------------------------*/ | |
1310 | ||
1311 | static void | |
1312 | net2272_set_fifo_mode(struct net2272 *dev, int mode) | |
1313 | { | |
1314 | u8 tmp; | |
1315 | ||
1316 | tmp = net2272_read(dev, LOCCTL) & 0x3f; | |
1317 | tmp |= (mode << 6); | |
1318 | net2272_write(dev, LOCCTL, tmp); | |
1319 | ||
1320 | INIT_LIST_HEAD(&dev->gadget.ep_list); | |
1321 | ||
1322 | /* always ep-a, ep-c ... maybe not ep-b */ | |
1323 | list_add_tail(&dev->ep[1].ep.ep_list, &dev->gadget.ep_list); | |
1324 | ||
1325 | switch (mode) { | |
1326 | case 0: | |
1327 | list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list); | |
1328 | dev->ep[1].fifo_size = dev->ep[2].fifo_size = 512; | |
1329 | break; | |
1330 | case 1: | |
1331 | list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list); | |
1332 | dev->ep[1].fifo_size = 1024; | |
1333 | dev->ep[2].fifo_size = 512; | |
1334 | break; | |
1335 | case 2: | |
1336 | list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list); | |
1337 | dev->ep[1].fifo_size = dev->ep[2].fifo_size = 1024; | |
1338 | break; | |
1339 | case 3: | |
1340 | dev->ep[1].fifo_size = 1024; | |
1341 | break; | |
1342 | } | |
1343 | ||
1344 | /* ep-c is always 2 512 byte buffers */ | |
1345 | list_add_tail(&dev->ep[3].ep.ep_list, &dev->gadget.ep_list); | |
1346 | dev->ep[3].fifo_size = 512; | |
1347 | } | |
1348 | ||
1349 | /*---------------------------------------------------------------------------*/ | |
1350 | ||
ceb80363 SL |
1351 | static void |
1352 | net2272_usb_reset(struct net2272 *dev) | |
1353 | { | |
1354 | dev->gadget.speed = USB_SPEED_UNKNOWN; | |
1355 | ||
1356 | net2272_cancel_dma(dev); | |
1357 | ||
1358 | net2272_write(dev, IRQENB0, 0); | |
1359 | net2272_write(dev, IRQENB1, 0); | |
1360 | ||
1361 | /* clear irq state */ | |
1362 | net2272_write(dev, IRQSTAT0, 0xff); | |
1363 | net2272_write(dev, IRQSTAT1, ~(1 << SUSPEND_REQUEST_INTERRUPT)); | |
1364 | ||
1365 | net2272_write(dev, DMAREQ, | |
1366 | (0 << DMA_BUFFER_VALID) | | |
1367 | (0 << DMA_REQUEST_ENABLE) | | |
1368 | (1 << DMA_CONTROL_DACK) | | |
1369 | (dev->dma_eot_polarity << EOT_POLARITY) | | |
1370 | (dev->dma_dack_polarity << DACK_POLARITY) | | |
1371 | (dev->dma_dreq_polarity << DREQ_POLARITY) | | |
1372 | ((dma_ep >> 1) << DMA_ENDPOINT_SELECT)); | |
1373 | ||
1374 | net2272_cancel_dma(dev); | |
1375 | net2272_set_fifo_mode(dev, (fifo_mode <= 3) ? fifo_mode : 0); | |
1376 | ||
1377 | /* Set the NET2272 ep fifo data width to 16-bit mode and for correct byte swapping | |
1378 | * note that the higher level gadget drivers are expected to convert data to little endian. | |
1379 | * Enable byte swap for your local bus/cpu if needed by setting BYTE_SWAP in LOCCTL here | |
1380 | */ | |
1381 | net2272_write(dev, LOCCTL, net2272_read(dev, LOCCTL) | (1 << DATA_WIDTH)); | |
1382 | net2272_write(dev, LOCCTL1, (dma_mode << DMA_MODE)); | |
1383 | } | |
1384 | ||
1385 | static void | |
1386 | net2272_usb_reinit(struct net2272 *dev) | |
1387 | { | |
1388 | int i; | |
1389 | ||
1390 | /* basic endpoint init */ | |
1391 | for (i = 0; i < 4; ++i) { | |
1392 | struct net2272_ep *ep = &dev->ep[i]; | |
1393 | ||
1394 | ep->ep.name = ep_name[i]; | |
1395 | ep->dev = dev; | |
1396 | ep->num = i; | |
1397 | ep->not_empty = 0; | |
1398 | ||
1399 | if (use_dma && ep->num == dma_ep) | |
1400 | ep->dma = 1; | |
1401 | ||
1402 | if (i > 0 && i <= 3) | |
1403 | ep->fifo_size = 512; | |
1404 | else | |
1405 | ep->fifo_size = 64; | |
1406 | net2272_ep_reset(ep); | |
1407 | } | |
e117e742 | 1408 | usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 64); |
ceb80363 SL |
1409 | |
1410 | dev->gadget.ep0 = &dev->ep[0].ep; | |
1411 | dev->ep[0].stopped = 0; | |
1412 | INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); | |
1413 | } | |
1414 | ||
1415 | static void | |
1416 | net2272_ep0_start(struct net2272 *dev) | |
1417 | { | |
1418 | struct net2272_ep *ep0 = &dev->ep[0]; | |
1419 | ||
1420 | net2272_ep_write(ep0, EP_RSPSET, | |
1421 | (1 << NAK_OUT_PACKETS_MODE) | | |
1422 | (1 << ALT_NAK_OUT_PACKETS)); | |
1423 | net2272_ep_write(ep0, EP_RSPCLR, | |
1424 | (1 << HIDE_STATUS_PHASE) | | |
1425 | (1 << CONTROL_STATUS_PHASE_HANDSHAKE)); | |
1426 | net2272_write(dev, USBCTL0, | |
1427 | (dev->softconnect << USB_DETECT_ENABLE) | | |
1428 | (1 << USB_ROOT_PORT_WAKEUP_ENABLE) | | |
1429 | (1 << IO_WAKEUP_ENABLE)); | |
1430 | net2272_write(dev, IRQENB0, | |
1431 | (1 << SETUP_PACKET_INTERRUPT_ENABLE) | | |
1432 | (1 << ENDPOINT_0_INTERRUPT_ENABLE) | | |
1433 | (1 << DMA_DONE_INTERRUPT_ENABLE)); | |
1434 | net2272_write(dev, IRQENB1, | |
1435 | (1 << VBUS_INTERRUPT_ENABLE) | | |
1436 | (1 << ROOT_PORT_RESET_INTERRUPT_ENABLE) | | |
1437 | (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE)); | |
1438 | } | |
1439 | ||
1440 | /* when a driver is successfully registered, it will receive | |
1441 | * control requests including set_configuration(), which enables | |
1442 | * non-control requests. then usb traffic follows until a | |
1443 | * disconnect is reported. then a host may connect again, or | |
1444 | * the driver might get unbound. | |
1445 | */ | |
96f8db6a FB |
1446 | static int net2272_start(struct usb_gadget *_gadget, |
1447 | struct usb_gadget_driver *driver) | |
ceb80363 | 1448 | { |
96f8db6a | 1449 | struct net2272 *dev; |
ceb80363 SL |
1450 | unsigned i; |
1451 | ||
a6c7c1c4 | 1452 | if (!driver || !driver->setup || |
7177aed4 | 1453 | driver->max_speed != USB_SPEED_HIGH) |
ceb80363 | 1454 | return -EINVAL; |
96f8db6a FB |
1455 | |
1456 | dev = container_of(_gadget, struct net2272, gadget); | |
ceb80363 SL |
1457 | |
1458 | for (i = 0; i < 4; ++i) | |
1459 | dev->ep[i].irqs = 0; | |
1460 | /* hook up the driver ... */ | |
1461 | dev->softconnect = 1; | |
1462 | driver->driver.bus = NULL; | |
1463 | dev->driver = driver; | |
ceb80363 SL |
1464 | |
1465 | /* ... then enable host detection and ep0; and we're ready | |
1466 | * for set_configuration as well as eventual disconnect. | |
1467 | */ | |
1468 | net2272_ep0_start(dev); | |
1469 | ||
ceb80363 SL |
1470 | return 0; |
1471 | } | |
ceb80363 SL |
1472 | |
1473 | static void | |
1474 | stop_activity(struct net2272 *dev, struct usb_gadget_driver *driver) | |
1475 | { | |
1476 | int i; | |
1477 | ||
1478 | /* don't disconnect if it's not connected */ | |
1479 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1480 | driver = NULL; | |
1481 | ||
1482 | /* stop hardware; prevent new request submissions; | |
1483 | * and kill any outstanding requests. | |
1484 | */ | |
1485 | net2272_usb_reset(dev); | |
1486 | for (i = 0; i < 4; ++i) | |
1487 | net2272_dequeue_all(&dev->ep[i]); | |
1488 | ||
699412d9 FB |
1489 | /* report disconnect; the driver is already quiesced */ |
1490 | if (driver) { | |
1491 | spin_unlock(&dev->lock); | |
1492 | driver->disconnect(&dev->gadget); | |
1493 | spin_lock(&dev->lock); | |
1494 | } | |
1495 | ||
ceb80363 SL |
1496 | net2272_usb_reinit(dev); |
1497 | } | |
1498 | ||
22835b80 | 1499 | static int net2272_stop(struct usb_gadget *_gadget) |
ceb80363 | 1500 | { |
96f8db6a | 1501 | struct net2272 *dev; |
ceb80363 SL |
1502 | unsigned long flags; |
1503 | ||
96f8db6a | 1504 | dev = container_of(_gadget, struct net2272, gadget); |
ceb80363 SL |
1505 | |
1506 | spin_lock_irqsave(&dev->lock, flags); | |
5baca5cf | 1507 | stop_activity(dev, NULL); |
ceb80363 SL |
1508 | spin_unlock_irqrestore(&dev->lock, flags); |
1509 | ||
ceb80363 SL |
1510 | dev->driver = NULL; |
1511 | ||
ceb80363 SL |
1512 | return 0; |
1513 | } | |
ceb80363 SL |
1514 | |
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 */ | |
1702 | if (mode == TEST_PACKET) { | |
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)); | |
1924 | spin_unlock(&dev->lock); | |
1925 | tmp = dev->driver->setup(&dev->gadget, &u.r); | |
1926 | spin_lock(&dev->lock); | |
1927 | } | |
1928 | ||
1929 | /* stall ep0 on error */ | |
1930 | if (tmp < 0) { | |
1931 | do_stall: | |
1932 | dev_vdbg(dev->dev, "req %02x.%02x protocol STALL; stat %d\n", | |
1933 | u.r.bRequestType, u.r.bRequest, tmp); | |
1934 | dev->protocol_stall = 1; | |
1935 | } | |
1936 | /* endpoint dma irq? */ | |
1937 | } else if (stat & (1 << DMA_DONE_INTERRUPT)) { | |
1938 | net2272_cancel_dma(dev); | |
1939 | net2272_write(dev, IRQSTAT0, 1 << DMA_DONE_INTERRUPT); | |
1940 | stat &= ~(1 << DMA_DONE_INTERRUPT); | |
1941 | num = (net2272_read(dev, DMAREQ) & (1 << DMA_ENDPOINT_SELECT)) | |
1942 | ? 2 : 1; | |
1943 | ||
1944 | ep = &dev->ep[num]; | |
1945 | net2272_handle_dma(ep); | |
1946 | } | |
1947 | ||
1948 | next_endpoints: | |
1949 | /* endpoint data irq? */ | |
1950 | scratch = stat & 0x0f; | |
1951 | stat &= ~0x0f; | |
1952 | for (num = 0; scratch; num++) { | |
1953 | u8 t; | |
1954 | ||
1955 | /* does this endpoint's FIFO and queue need tending? */ | |
1956 | t = 1 << num; | |
1957 | if ((scratch & t) == 0) | |
1958 | continue; | |
1959 | scratch ^= t; | |
1960 | ||
1961 | ep = &dev->ep[num]; | |
1962 | net2272_handle_ep(ep); | |
1963 | } | |
1964 | ||
1965 | /* some interrupts we can just ignore */ | |
1966 | stat &= ~(1 << SOF_INTERRUPT); | |
1967 | ||
1968 | if (stat) | |
1969 | dev_dbg(dev->dev, "unhandled irqstat0 %02x\n", stat); | |
1970 | } | |
1971 | ||
1972 | static void | |
1973 | net2272_handle_stat1_irqs(struct net2272 *dev, u8 stat) | |
1974 | { | |
1975 | u8 tmp, mask; | |
1976 | ||
1977 | /* after disconnect there's nothing else to do! */ | |
1978 | tmp = (1 << VBUS_INTERRUPT) | (1 << ROOT_PORT_RESET_INTERRUPT); | |
1979 | mask = (1 << USB_HIGH_SPEED) | (1 << USB_FULL_SPEED); | |
1980 | ||
1981 | if (stat & tmp) { | |
5ca1ccda AS |
1982 | bool reset = false; |
1983 | bool disconnect = false; | |
1984 | ||
1985 | /* | |
1986 | * Ignore disconnects and resets if the speed hasn't been set. | |
1987 | * VBUS can bounce and there's always an initial reset. | |
1988 | */ | |
ceb80363 | 1989 | net2272_write(dev, IRQSTAT1, tmp); |
5ca1ccda AS |
1990 | if (dev->gadget.speed != USB_SPEED_UNKNOWN) { |
1991 | if ((stat & (1 << VBUS_INTERRUPT)) && | |
1992 | (net2272_read(dev, USBCTL1) & | |
1993 | (1 << VBUS_PIN)) == 0) { | |
1994 | disconnect = true; | |
1995 | dev_dbg(dev->dev, "disconnect %s\n", | |
1996 | dev->driver->driver.name); | |
1997 | } else if ((stat & (1 << ROOT_PORT_RESET_INTERRUPT)) && | |
1998 | (net2272_read(dev, USBCTL1) & mask) | |
1999 | == 0) { | |
2000 | reset = true; | |
2001 | dev_dbg(dev->dev, "reset %s\n", | |
2002 | dev->driver->driver.name); | |
2003 | } | |
2004 | ||
2005 | if (disconnect || reset) { | |
2006 | stop_activity(dev, dev->driver); | |
2007 | net2272_ep0_start(dev); | |
2008 | spin_unlock(&dev->lock); | |
2009 | if (reset) | |
2010 | usb_gadget_udc_reset | |
2011 | (&dev->gadget, dev->driver); | |
2012 | else | |
2013 | (dev->driver->disconnect) | |
2014 | (&dev->gadget); | |
2015 | spin_lock(&dev->lock); | |
2016 | return; | |
2017 | } | |
ceb80363 SL |
2018 | } |
2019 | stat &= ~tmp; | |
2020 | ||
2021 | if (!stat) | |
2022 | return; | |
2023 | } | |
2024 | ||
2025 | tmp = (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT); | |
2026 | if (stat & tmp) { | |
2027 | net2272_write(dev, IRQSTAT1, tmp); | |
2028 | if (stat & (1 << SUSPEND_REQUEST_INTERRUPT)) { | |
2029 | if (dev->driver->suspend) | |
2030 | dev->driver->suspend(&dev->gadget); | |
2031 | if (!enable_suspend) { | |
2032 | stat &= ~(1 << SUSPEND_REQUEST_INTERRUPT); | |
2033 | dev_dbg(dev->dev, "Suspend disabled, ignoring\n"); | |
2034 | } | |
2035 | } else { | |
2036 | if (dev->driver->resume) | |
2037 | dev->driver->resume(&dev->gadget); | |
2038 | } | |
2039 | stat &= ~tmp; | |
2040 | } | |
2041 | ||
2042 | /* clear any other status/irqs */ | |
2043 | if (stat) | |
2044 | net2272_write(dev, IRQSTAT1, stat); | |
2045 | ||
2046 | /* some status we can just ignore */ | |
2047 | stat &= ~((1 << CONTROL_STATUS_INTERRUPT) | |
2048 | | (1 << SUSPEND_REQUEST_INTERRUPT) | |
2049 | | (1 << RESUME_INTERRUPT)); | |
2050 | if (!stat) | |
2051 | return; | |
2052 | else | |
2053 | dev_dbg(dev->dev, "unhandled irqstat1 %02x\n", stat); | |
2054 | } | |
2055 | ||
2056 | static irqreturn_t net2272_irq(int irq, void *_dev) | |
2057 | { | |
2058 | struct net2272 *dev = _dev; | |
2059 | #if defined(PLX_PCI_RDK) || defined(PLX_PCI_RDK2) | |
2060 | u32 intcsr; | |
2061 | #endif | |
2062 | #if defined(PLX_PCI_RDK) | |
2063 | u8 dmareq; | |
2064 | #endif | |
2065 | spin_lock(&dev->lock); | |
2066 | #if defined(PLX_PCI_RDK) | |
2067 | intcsr = readl(dev->rdk1.plx9054_base_addr + INTCSR); | |
2068 | ||
2069 | if ((intcsr & LOCAL_INTERRUPT_TEST) == LOCAL_INTERRUPT_TEST) { | |
2070 | writel(intcsr & ~(1 << PCI_INTERRUPT_ENABLE), | |
2071 | dev->rdk1.plx9054_base_addr + INTCSR); | |
2072 | net2272_handle_stat1_irqs(dev, net2272_read(dev, IRQSTAT1)); | |
2073 | net2272_handle_stat0_irqs(dev, net2272_read(dev, IRQSTAT0)); | |
2074 | intcsr = readl(dev->rdk1.plx9054_base_addr + INTCSR); | |
2075 | writel(intcsr | (1 << PCI_INTERRUPT_ENABLE), | |
2076 | dev->rdk1.plx9054_base_addr + INTCSR); | |
2077 | } | |
2078 | if ((intcsr & DMA_CHANNEL_0_TEST) == DMA_CHANNEL_0_TEST) { | |
2079 | writeb((1 << CHANNEL_CLEAR_INTERRUPT | (0 << CHANNEL_ENABLE)), | |
2080 | dev->rdk1.plx9054_base_addr + DMACSR0); | |
2081 | ||
2082 | dmareq = net2272_read(dev, DMAREQ); | |
2083 | if (dmareq & 0x01) | |
2084 | net2272_handle_dma(&dev->ep[2]); | |
2085 | else | |
2086 | net2272_handle_dma(&dev->ep[1]); | |
2087 | } | |
2088 | #endif | |
2089 | #if defined(PLX_PCI_RDK2) | |
2090 | /* see if PCI int for us by checking irqstat */ | |
2091 | intcsr = readl(dev->rdk2.fpga_base_addr + RDK2_IRQSTAT); | |
000b7f51 WY |
2092 | if (!intcsr & (1 << NET2272_PCI_IRQ)) { |
2093 | spin_unlock(&dev->lock); | |
ceb80363 | 2094 | return IRQ_NONE; |
000b7f51 | 2095 | } |
ceb80363 SL |
2096 | /* check dma interrupts */ |
2097 | #endif | |
2098 | /* Platform/devcice interrupt handler */ | |
2099 | #if !defined(PLX_PCI_RDK) | |
2100 | net2272_handle_stat1_irqs(dev, net2272_read(dev, IRQSTAT1)); | |
2101 | net2272_handle_stat0_irqs(dev, net2272_read(dev, IRQSTAT0)); | |
2102 | #endif | |
2103 | spin_unlock(&dev->lock); | |
2104 | ||
2105 | return IRQ_HANDLED; | |
2106 | } | |
2107 | ||
2108 | static int net2272_present(struct net2272 *dev) | |
2109 | { | |
2110 | /* | |
2111 | * Quick test to see if CPU can communicate properly with the NET2272. | |
2112 | * Verifies connection using writes and reads to write/read and | |
2113 | * read-only registers. | |
2114 | * | |
2115 | * This routine is strongly recommended especially during early bring-up | |
2116 | * of new hardware, however for designs that do not apply Power On System | |
2117 | * Tests (POST) it may discarded (or perhaps minimized). | |
2118 | */ | |
2119 | unsigned int ii; | |
2120 | u8 val, refval; | |
2121 | ||
2122 | /* Verify NET2272 write/read SCRATCH register can write and read */ | |
2123 | refval = net2272_read(dev, SCRATCH); | |
2124 | for (ii = 0; ii < 0x100; ii += 7) { | |
2125 | net2272_write(dev, SCRATCH, ii); | |
2126 | val = net2272_read(dev, SCRATCH); | |
2127 | if (val != ii) { | |
2128 | dev_dbg(dev->dev, | |
2129 | "%s: write/read SCRATCH register test failed: " | |
2130 | "wrote:0x%2.2x, read:0x%2.2x\n", | |
2131 | __func__, ii, val); | |
2132 | return -EINVAL; | |
2133 | } | |
2134 | } | |
2135 | /* To be nice, we write the original SCRATCH value back: */ | |
2136 | net2272_write(dev, SCRATCH, refval); | |
2137 | ||
2138 | /* Verify NET2272 CHIPREV register is read-only: */ | |
2139 | refval = net2272_read(dev, CHIPREV_2272); | |
2140 | for (ii = 0; ii < 0x100; ii += 7) { | |
2141 | net2272_write(dev, CHIPREV_2272, ii); | |
2142 | val = net2272_read(dev, CHIPREV_2272); | |
2143 | if (val != refval) { | |
2144 | dev_dbg(dev->dev, | |
2145 | "%s: write/read CHIPREV register test failed: " | |
2146 | "wrote 0x%2.2x, read:0x%2.2x expected:0x%2.2x\n", | |
2147 | __func__, ii, val, refval); | |
2148 | return -EINVAL; | |
2149 | } | |
2150 | } | |
2151 | ||
2152 | /* | |
2153 | * Verify NET2272's "NET2270 legacy revision" register | |
2154 | * - NET2272 has two revision registers. The NET2270 legacy revision | |
2155 | * register should read the same value, regardless of the NET2272 | |
2156 | * silicon revision. The legacy register applies to NET2270 | |
2157 | * firmware being applied to the NET2272. | |
2158 | */ | |
2159 | val = net2272_read(dev, CHIPREV_LEGACY); | |
2160 | if (val != NET2270_LEGACY_REV) { | |
2161 | /* | |
2162 | * Unexpected legacy revision value | |
2163 | * - Perhaps the chip is a NET2270? | |
2164 | */ | |
2165 | dev_dbg(dev->dev, | |
2166 | "%s: WARNING: UNEXPECTED NET2272 LEGACY REGISTER VALUE:\n" | |
2167 | " - CHIPREV_LEGACY: expected 0x%2.2x, got:0x%2.2x. (Not NET2272?)\n", | |
2168 | __func__, NET2270_LEGACY_REV, val); | |
2169 | return -EINVAL; | |
2170 | } | |
2171 | ||
2172 | /* | |
2173 | * Verify NET2272 silicon revision | |
2174 | * - This revision register is appropriate for the silicon version | |
2175 | * of the NET2272 | |
2176 | */ | |
2177 | val = net2272_read(dev, CHIPREV_2272); | |
2178 | switch (val) { | |
2179 | case CHIPREV_NET2272_R1: | |
2180 | /* | |
2181 | * NET2272 Rev 1 has DMA related errata: | |
2182 | * - Newer silicon (Rev 1A or better) required | |
2183 | */ | |
2184 | dev_dbg(dev->dev, | |
2185 | "%s: Rev 1 detected: newer silicon recommended for DMA support\n", | |
2186 | __func__); | |
2187 | break; | |
2188 | case CHIPREV_NET2272_R1A: | |
2189 | break; | |
2190 | default: | |
2191 | /* NET2272 silicon version *may* not work with this firmware */ | |
2192 | dev_dbg(dev->dev, | |
2193 | "%s: unexpected silicon revision register value: " | |
2194 | " CHIPREV_2272: 0x%2.2x\n", | |
2195 | __func__, val); | |
2196 | /* | |
2197 | * Return Success, even though the chip rev is not an expected value | |
2198 | * - Older, pre-built firmware can attempt to operate on newer silicon | |
2199 | * - Often, new silicon is perfectly compatible | |
2200 | */ | |
2201 | } | |
2202 | ||
2203 | /* Success: NET2272 checks out OK */ | |
2204 | return 0; | |
2205 | } | |
2206 | ||
2207 | static void | |
2208 | net2272_gadget_release(struct device *_dev) | |
2209 | { | |
2210 | struct net2272 *dev = dev_get_drvdata(_dev); | |
2211 | kfree(dev); | |
2212 | } | |
2213 | ||
2214 | /*---------------------------------------------------------------------------*/ | |
2215 | ||
fb4e98ab | 2216 | static void |
ceb80363 SL |
2217 | net2272_remove(struct net2272 *dev) |
2218 | { | |
0f91349b | 2219 | usb_del_gadget_udc(&dev->gadget); |
ceb80363 SL |
2220 | free_irq(dev->irq, dev); |
2221 | iounmap(dev->base_addr); | |
ceb80363 SL |
2222 | device_remove_file(dev->dev, &dev_attr_registers); |
2223 | ||
2224 | dev_info(dev->dev, "unbind\n"); | |
ceb80363 SL |
2225 | } |
2226 | ||
41ac7b3a | 2227 | static struct net2272 *net2272_probe_init(struct device *dev, unsigned int irq) |
ceb80363 SL |
2228 | { |
2229 | struct net2272 *ret; | |
2230 | ||
ceb80363 SL |
2231 | if (!irq) { |
2232 | dev_dbg(dev, "No IRQ!\n"); | |
2233 | return ERR_PTR(-ENODEV); | |
2234 | } | |
2235 | ||
2236 | /* alloc, and start init */ | |
2237 | ret = kzalloc(sizeof(*ret), GFP_KERNEL); | |
2238 | if (!ret) | |
2239 | return ERR_PTR(-ENOMEM); | |
2240 | ||
2241 | spin_lock_init(&ret->lock); | |
2242 | ret->irq = irq; | |
2243 | ret->dev = dev; | |
2244 | ret->gadget.ops = &net2272_ops; | |
d327ab5b | 2245 | ret->gadget.max_speed = USB_SPEED_HIGH; |
ceb80363 SL |
2246 | |
2247 | /* the "gadget" abstracts/virtualizes the controller */ | |
ceb80363 SL |
2248 | ret->gadget.name = driver_name; |
2249 | ||
2250 | return ret; | |
2251 | } | |
2252 | ||
41ac7b3a | 2253 | static int |
ceb80363 SL |
2254 | net2272_probe_fin(struct net2272 *dev, unsigned int irqflags) |
2255 | { | |
2256 | int ret; | |
2257 | ||
2258 | /* See if there... */ | |
2259 | if (net2272_present(dev)) { | |
2260 | dev_warn(dev->dev, "2272 not found!\n"); | |
2261 | ret = -ENODEV; | |
2262 | goto err; | |
2263 | } | |
2264 | ||
2265 | net2272_usb_reset(dev); | |
2266 | net2272_usb_reinit(dev); | |
2267 | ||
2268 | ret = request_irq(dev->irq, net2272_irq, irqflags, driver_name, dev); | |
2269 | if (ret) { | |
2270 | dev_err(dev->dev, "request interrupt %i failed\n", dev->irq); | |
2271 | goto err; | |
2272 | } | |
2273 | ||
2274 | dev->chiprev = net2272_read(dev, CHIPREV_2272); | |
2275 | ||
2276 | /* done */ | |
2277 | dev_info(dev->dev, "%s\n", driver_desc); | |
2278 | dev_info(dev->dev, "irq %i, mem %p, chip rev %04x, dma %s\n", | |
2279 | dev->irq, dev->base_addr, dev->chiprev, | |
2280 | dma_mode_string()); | |
2281 | dev_info(dev->dev, "version: %s\n", driver_vers); | |
2282 | ||
ceb80363 SL |
2283 | ret = device_create_file(dev->dev, &dev_attr_registers); |
2284 | if (ret) | |
c9f9c849 | 2285 | goto err_irq; |
ceb80363 | 2286 | |
8efeeef6 FB |
2287 | ret = usb_add_gadget_udc_release(dev->dev, &dev->gadget, |
2288 | net2272_gadget_release); | |
0f91349b SAS |
2289 | if (ret) |
2290 | goto err_add_udc; | |
2291 | ||
ceb80363 SL |
2292 | return 0; |
2293 | ||
0f91349b SAS |
2294 | err_add_udc: |
2295 | device_remove_file(dev->dev, &dev_attr_registers); | |
ceb80363 SL |
2296 | err_irq: |
2297 | free_irq(dev->irq, dev); | |
2298 | err: | |
2299 | return ret; | |
2300 | } | |
2301 | ||
2302 | #ifdef CONFIG_PCI | |
2303 | ||
2304 | /* | |
2305 | * wrap this driver around the specified device, but | |
2306 | * don't respond over USB until a gadget driver binds to us | |
2307 | */ | |
2308 | ||
41ac7b3a | 2309 | static int |
ceb80363 SL |
2310 | net2272_rdk1_probe(struct pci_dev *pdev, struct net2272 *dev) |
2311 | { | |
2312 | unsigned long resource, len, tmp; | |
2313 | void __iomem *mem_mapped_addr[4]; | |
2314 | int ret, i; | |
2315 | ||
2316 | /* | |
2317 | * BAR 0 holds PLX 9054 config registers | |
2318 | * BAR 1 is i/o memory; unused here | |
2319 | * BAR 2 holds EPLD config registers | |
2320 | * BAR 3 holds NET2272 registers | |
2321 | */ | |
2322 | ||
2323 | /* Find and map all address spaces */ | |
2324 | for (i = 0; i < 4; ++i) { | |
2325 | if (i == 1) | |
2326 | continue; /* BAR1 unused */ | |
2327 | ||
2328 | resource = pci_resource_start(pdev, i); | |
2329 | len = pci_resource_len(pdev, i); | |
2330 | ||
2331 | if (!request_mem_region(resource, len, driver_name)) { | |
2332 | dev_dbg(dev->dev, "controller already in use\n"); | |
2333 | ret = -EBUSY; | |
2334 | goto err; | |
2335 | } | |
2336 | ||
2337 | mem_mapped_addr[i] = ioremap_nocache(resource, len); | |
2338 | if (mem_mapped_addr[i] == NULL) { | |
2339 | release_mem_region(resource, len); | |
2340 | dev_dbg(dev->dev, "can't map memory\n"); | |
2341 | ret = -EFAULT; | |
2342 | goto err; | |
2343 | } | |
2344 | } | |
2345 | ||
2346 | dev->rdk1.plx9054_base_addr = mem_mapped_addr[0]; | |
2347 | dev->rdk1.epld_base_addr = mem_mapped_addr[2]; | |
2348 | dev->base_addr = mem_mapped_addr[3]; | |
2349 | ||
2350 | /* Set PLX 9054 bus width (16 bits) */ | |
2351 | tmp = readl(dev->rdk1.plx9054_base_addr + LBRD1); | |
2352 | writel((tmp & ~(3 << MEMORY_SPACE_LOCAL_BUS_WIDTH)) | W16_BIT, | |
2353 | dev->rdk1.plx9054_base_addr + LBRD1); | |
2354 | ||
2355 | /* Enable PLX 9054 Interrupts */ | |
2356 | writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) | | |
2357 | (1 << PCI_INTERRUPT_ENABLE) | | |
2358 | (1 << LOCAL_INTERRUPT_INPUT_ENABLE), | |
2359 | dev->rdk1.plx9054_base_addr + INTCSR); | |
2360 | ||
2361 | writeb((1 << CHANNEL_CLEAR_INTERRUPT | (0 << CHANNEL_ENABLE)), | |
2362 | dev->rdk1.plx9054_base_addr + DMACSR0); | |
2363 | ||
2364 | /* reset */ | |
2365 | writeb((1 << EPLD_DMA_ENABLE) | | |
2366 | (1 << DMA_CTL_DACK) | | |
2367 | (1 << DMA_TIMEOUT_ENABLE) | | |
2368 | (1 << USER) | | |
2369 | (0 << MPX_MODE) | | |
2370 | (1 << BUSWIDTH) | | |
2371 | (1 << NET2272_RESET), | |
2372 | dev->base_addr + EPLD_IO_CONTROL_REGISTER); | |
2373 | ||
2374 | mb(); | |
2375 | writeb(readb(dev->base_addr + EPLD_IO_CONTROL_REGISTER) & | |
2376 | ~(1 << NET2272_RESET), | |
2377 | dev->base_addr + EPLD_IO_CONTROL_REGISTER); | |
2378 | udelay(200); | |
2379 | ||
2380 | return 0; | |
2381 | ||
2382 | err: | |
2383 | while (--i >= 0) { | |
2384 | iounmap(mem_mapped_addr[i]); | |
2385 | release_mem_region(pci_resource_start(pdev, i), | |
2386 | pci_resource_len(pdev, i)); | |
2387 | } | |
2388 | ||
2389 | return ret; | |
2390 | } | |
2391 | ||
41ac7b3a | 2392 | static int |
ceb80363 SL |
2393 | net2272_rdk2_probe(struct pci_dev *pdev, struct net2272 *dev) |
2394 | { | |
2395 | unsigned long resource, len; | |
2396 | void __iomem *mem_mapped_addr[2]; | |
2397 | int ret, i; | |
2398 | ||
2399 | /* | |
2400 | * BAR 0 holds FGPA config registers | |
2401 | * BAR 1 holds NET2272 registers | |
2402 | */ | |
2403 | ||
2404 | /* Find and map all address spaces, bar2-3 unused in rdk 2 */ | |
2405 | for (i = 0; i < 2; ++i) { | |
2406 | resource = pci_resource_start(pdev, i); | |
2407 | len = pci_resource_len(pdev, i); | |
2408 | ||
2409 | if (!request_mem_region(resource, len, driver_name)) { | |
2410 | dev_dbg(dev->dev, "controller already in use\n"); | |
2411 | ret = -EBUSY; | |
2412 | goto err; | |
2413 | } | |
2414 | ||
2415 | mem_mapped_addr[i] = ioremap_nocache(resource, len); | |
2416 | if (mem_mapped_addr[i] == NULL) { | |
2417 | release_mem_region(resource, len); | |
2418 | dev_dbg(dev->dev, "can't map memory\n"); | |
2419 | ret = -EFAULT; | |
2420 | goto err; | |
2421 | } | |
2422 | } | |
2423 | ||
2424 | dev->rdk2.fpga_base_addr = mem_mapped_addr[0]; | |
2425 | dev->base_addr = mem_mapped_addr[1]; | |
2426 | ||
2427 | mb(); | |
2428 | /* Set 2272 bus width (16 bits) and reset */ | |
2429 | writel((1 << CHIP_RESET), dev->rdk2.fpga_base_addr + RDK2_LOCCTLRDK); | |
2430 | udelay(200); | |
2431 | writel((1 << BUS_WIDTH), dev->rdk2.fpga_base_addr + RDK2_LOCCTLRDK); | |
2432 | /* Print fpga version number */ | |
2433 | dev_info(dev->dev, "RDK2 FPGA version %08x\n", | |
2434 | readl(dev->rdk2.fpga_base_addr + RDK2_FPGAREV)); | |
2435 | /* Enable FPGA Interrupts */ | |
2436 | writel((1 << NET2272_PCI_IRQ), dev->rdk2.fpga_base_addr + RDK2_IRQENB); | |
2437 | ||
2438 | return 0; | |
2439 | ||
2440 | err: | |
2441 | while (--i >= 0) { | |
2442 | iounmap(mem_mapped_addr[i]); | |
2443 | release_mem_region(pci_resource_start(pdev, i), | |
2444 | pci_resource_len(pdev, i)); | |
2445 | } | |
2446 | ||
2447 | return ret; | |
2448 | } | |
2449 | ||
41ac7b3a | 2450 | static int |
ceb80363 SL |
2451 | net2272_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
2452 | { | |
2453 | struct net2272 *dev; | |
2454 | int ret; | |
2455 | ||
2456 | dev = net2272_probe_init(&pdev->dev, pdev->irq); | |
2457 | if (IS_ERR(dev)) | |
2458 | return PTR_ERR(dev); | |
2459 | dev->dev_id = pdev->device; | |
2460 | ||
2461 | if (pci_enable_device(pdev) < 0) { | |
2462 | ret = -ENODEV; | |
2463 | goto err_free; | |
2464 | } | |
2465 | ||
2466 | pci_set_master(pdev); | |
2467 | ||
2468 | switch (pdev->device) { | |
2469 | case PCI_DEVICE_ID_RDK1: ret = net2272_rdk1_probe(pdev, dev); break; | |
2470 | case PCI_DEVICE_ID_RDK2: ret = net2272_rdk2_probe(pdev, dev); break; | |
2471 | default: BUG(); | |
2472 | } | |
2473 | if (ret) | |
2474 | goto err_pci; | |
2475 | ||
2476 | ret = net2272_probe_fin(dev, 0); | |
2477 | if (ret) | |
2478 | goto err_pci; | |
2479 | ||
2480 | pci_set_drvdata(pdev, dev); | |
2481 | ||
2482 | return 0; | |
2483 | ||
2484 | err_pci: | |
2485 | pci_disable_device(pdev); | |
2486 | err_free: | |
2487 | kfree(dev); | |
2488 | ||
2489 | return ret; | |
2490 | } | |
2491 | ||
fb4e98ab | 2492 | static void |
ceb80363 SL |
2493 | net2272_rdk1_remove(struct pci_dev *pdev, struct net2272 *dev) |
2494 | { | |
2495 | int i; | |
2496 | ||
2497 | /* disable PLX 9054 interrupts */ | |
2498 | writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) & | |
2499 | ~(1 << PCI_INTERRUPT_ENABLE), | |
2500 | dev->rdk1.plx9054_base_addr + INTCSR); | |
2501 | ||
2502 | /* clean up resources allocated during probe() */ | |
2503 | iounmap(dev->rdk1.plx9054_base_addr); | |
2504 | iounmap(dev->rdk1.epld_base_addr); | |
2505 | ||
2506 | for (i = 0; i < 4; ++i) { | |
2507 | if (i == 1) | |
2508 | continue; /* BAR1 unused */ | |
2509 | release_mem_region(pci_resource_start(pdev, i), | |
2510 | pci_resource_len(pdev, i)); | |
2511 | } | |
2512 | } | |
2513 | ||
fb4e98ab | 2514 | static void |
ceb80363 SL |
2515 | net2272_rdk2_remove(struct pci_dev *pdev, struct net2272 *dev) |
2516 | { | |
2517 | int i; | |
2518 | ||
2519 | /* disable fpga interrupts | |
2520 | writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) & | |
2521 | ~(1 << PCI_INTERRUPT_ENABLE), | |
2522 | dev->rdk1.plx9054_base_addr + INTCSR); | |
2523 | */ | |
2524 | ||
2525 | /* clean up resources allocated during probe() */ | |
2526 | iounmap(dev->rdk2.fpga_base_addr); | |
2527 | ||
2528 | for (i = 0; i < 2; ++i) | |
2529 | release_mem_region(pci_resource_start(pdev, i), | |
2530 | pci_resource_len(pdev, i)); | |
2531 | } | |
2532 | ||
fb4e98ab | 2533 | static void |
ceb80363 SL |
2534 | net2272_pci_remove(struct pci_dev *pdev) |
2535 | { | |
2536 | struct net2272 *dev = pci_get_drvdata(pdev); | |
2537 | ||
2538 | net2272_remove(dev); | |
2539 | ||
2540 | switch (pdev->device) { | |
2541 | case PCI_DEVICE_ID_RDK1: net2272_rdk1_remove(pdev, dev); break; | |
2542 | case PCI_DEVICE_ID_RDK2: net2272_rdk2_remove(pdev, dev); break; | |
2543 | default: BUG(); | |
2544 | } | |
2545 | ||
2546 | pci_disable_device(pdev); | |
2547 | ||
2548 | kfree(dev); | |
2549 | } | |
2550 | ||
2551 | /* Table of matching PCI IDs */ | |
d3608b6d | 2552 | static struct pci_device_id pci_ids[] = { |
ceb80363 SL |
2553 | { /* RDK 1 card */ |
2554 | .class = ((PCI_CLASS_BRIDGE_OTHER << 8) | 0xfe), | |
2555 | .class_mask = 0, | |
2556 | .vendor = PCI_VENDOR_ID_PLX, | |
2557 | .device = PCI_DEVICE_ID_RDK1, | |
2558 | .subvendor = PCI_ANY_ID, | |
2559 | .subdevice = PCI_ANY_ID, | |
2560 | }, | |
2561 | { /* RDK 2 card */ | |
2562 | .class = ((PCI_CLASS_BRIDGE_OTHER << 8) | 0xfe), | |
2563 | .class_mask = 0, | |
2564 | .vendor = PCI_VENDOR_ID_PLX, | |
2565 | .device = PCI_DEVICE_ID_RDK2, | |
2566 | .subvendor = PCI_ANY_ID, | |
2567 | .subdevice = PCI_ANY_ID, | |
2568 | }, | |
2569 | { } | |
2570 | }; | |
2571 | MODULE_DEVICE_TABLE(pci, pci_ids); | |
2572 | ||
2573 | static struct pci_driver net2272_pci_driver = { | |
2574 | .name = driver_name, | |
2575 | .id_table = pci_ids, | |
2576 | ||
2577 | .probe = net2272_pci_probe, | |
7690417d | 2578 | .remove = net2272_pci_remove, |
ceb80363 SL |
2579 | }; |
2580 | ||
e4fe056e SAS |
2581 | static int net2272_pci_register(void) |
2582 | { | |
2583 | return pci_register_driver(&net2272_pci_driver); | |
2584 | } | |
2585 | ||
2586 | static void net2272_pci_unregister(void) | |
2587 | { | |
2588 | pci_unregister_driver(&net2272_pci_driver); | |
2589 | } | |
2590 | ||
ceb80363 | 2591 | #else |
e4fe056e SAS |
2592 | static inline int net2272_pci_register(void) { return 0; } |
2593 | static inline void net2272_pci_unregister(void) { } | |
ceb80363 SL |
2594 | #endif |
2595 | ||
2596 | /*---------------------------------------------------------------------------*/ | |
2597 | ||
41ac7b3a | 2598 | static int |
ceb80363 SL |
2599 | net2272_plat_probe(struct platform_device *pdev) |
2600 | { | |
2601 | struct net2272 *dev; | |
2602 | int ret; | |
2603 | unsigned int irqflags; | |
2604 | resource_size_t base, len; | |
2605 | struct resource *iomem, *iomem_bus, *irq_res; | |
2606 | ||
2607 | irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
2608 | iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
2609 | iomem_bus = platform_get_resource(pdev, IORESOURCE_BUS, 0); | |
2610 | if (!irq_res || !iomem) { | |
2611 | dev_err(&pdev->dev, "must provide irq/base addr"); | |
2612 | return -EINVAL; | |
2613 | } | |
2614 | ||
2615 | dev = net2272_probe_init(&pdev->dev, irq_res->start); | |
2616 | if (IS_ERR(dev)) | |
2617 | return PTR_ERR(dev); | |
2618 | ||
2619 | irqflags = 0; | |
2620 | if (irq_res->flags & IORESOURCE_IRQ_HIGHEDGE) | |
2621 | irqflags |= IRQF_TRIGGER_RISING; | |
2622 | if (irq_res->flags & IORESOURCE_IRQ_LOWEDGE) | |
2623 | irqflags |= IRQF_TRIGGER_FALLING; | |
2624 | if (irq_res->flags & IORESOURCE_IRQ_HIGHLEVEL) | |
2625 | irqflags |= IRQF_TRIGGER_HIGH; | |
2626 | if (irq_res->flags & IORESOURCE_IRQ_LOWLEVEL) | |
2627 | irqflags |= IRQF_TRIGGER_LOW; | |
2628 | ||
2629 | base = iomem->start; | |
2630 | len = resource_size(iomem); | |
2631 | if (iomem_bus) | |
2632 | dev->base_shift = iomem_bus->start; | |
2633 | ||
2634 | if (!request_mem_region(base, len, driver_name)) { | |
2635 | dev_dbg(dev->dev, "get request memory region!\n"); | |
2636 | ret = -EBUSY; | |
2637 | goto err; | |
2638 | } | |
2639 | dev->base_addr = ioremap_nocache(base, len); | |
2640 | if (!dev->base_addr) { | |
2641 | dev_dbg(dev->dev, "can't map memory\n"); | |
2642 | ret = -EFAULT; | |
2643 | goto err_req; | |
2644 | } | |
2645 | ||
2646 | ret = net2272_probe_fin(dev, IRQF_TRIGGER_LOW); | |
2647 | if (ret) | |
2648 | goto err_io; | |
2649 | ||
2650 | platform_set_drvdata(pdev, dev); | |
2651 | dev_info(&pdev->dev, "running in 16-bit, %sbyte swap local bus mode\n", | |
2652 | (net2272_read(dev, LOCCTL) & (1 << BYTE_SWAP)) ? "" : "no "); | |
2653 | ||
ceb80363 SL |
2654 | return 0; |
2655 | ||
2656 | err_io: | |
2657 | iounmap(dev->base_addr); | |
2658 | err_req: | |
2659 | release_mem_region(base, len); | |
2660 | err: | |
2661 | return ret; | |
2662 | } | |
2663 | ||
fb4e98ab | 2664 | static int |
ceb80363 SL |
2665 | net2272_plat_remove(struct platform_device *pdev) |
2666 | { | |
2667 | struct net2272 *dev = platform_get_drvdata(pdev); | |
2668 | ||
2669 | net2272_remove(dev); | |
2670 | ||
2671 | release_mem_region(pdev->resource[0].start, | |
2672 | resource_size(&pdev->resource[0])); | |
2673 | ||
2674 | kfree(dev); | |
2675 | ||
2676 | return 0; | |
2677 | } | |
2678 | ||
2679 | static struct platform_driver net2272_plat_driver = { | |
2680 | .probe = net2272_plat_probe, | |
7690417d | 2681 | .remove = net2272_plat_remove, |
ceb80363 SL |
2682 | .driver = { |
2683 | .name = driver_name, | |
ceb80363 SL |
2684 | }, |
2685 | /* FIXME .suspend, .resume */ | |
2686 | }; | |
86081d7b | 2687 | MODULE_ALIAS("platform:net2272"); |
ceb80363 SL |
2688 | |
2689 | static int __init net2272_init(void) | |
2690 | { | |
e4fe056e SAS |
2691 | int ret; |
2692 | ||
2693 | ret = net2272_pci_register(); | |
2694 | if (ret) | |
2695 | return ret; | |
2696 | ret = platform_driver_register(&net2272_plat_driver); | |
2697 | if (ret) | |
2698 | goto err_pci; | |
2699 | return ret; | |
2700 | ||
2701 | err_pci: | |
2702 | net2272_pci_unregister(); | |
2703 | return ret; | |
ceb80363 SL |
2704 | } |
2705 | module_init(net2272_init); | |
2706 | ||
2707 | static void __exit net2272_cleanup(void) | |
2708 | { | |
e4fe056e | 2709 | net2272_pci_unregister(); |
ceb80363 SL |
2710 | platform_driver_unregister(&net2272_plat_driver); |
2711 | } | |
2712 | module_exit(net2272_cleanup); | |
2713 | ||
2714 | MODULE_DESCRIPTION(DRIVER_DESC); | |
2715 | MODULE_AUTHOR("PLX Technology, Inc."); | |
2716 | MODULE_LICENSE("GPL"); |