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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 | { | |
ceb80363 SL |
332 | struct net2272_request *req; |
333 | ||
334 | if (!_ep) | |
335 | return NULL; | |
ceb80363 SL |
336 | |
337 | req = kzalloc(sizeof(*req), gfp_flags); | |
338 | if (!req) | |
339 | return NULL; | |
340 | ||
ceb80363 SL |
341 | INIT_LIST_HEAD(&req->queue); |
342 | ||
343 | return &req->req; | |
344 | } | |
345 | ||
346 | static void | |
347 | net2272_free_request(struct usb_ep *_ep, struct usb_request *_req) | |
348 | { | |
ceb80363 SL |
349 | struct net2272_request *req; |
350 | ||
ceb80363 SL |
351 | if (!_ep || !_req) |
352 | return; | |
353 | ||
354 | req = container_of(_req, struct net2272_request, req); | |
355 | WARN_ON(!list_empty(&req->queue)); | |
356 | kfree(req); | |
357 | } | |
358 | ||
359 | static void | |
360 | net2272_done(struct net2272_ep *ep, struct net2272_request *req, int status) | |
361 | { | |
362 | struct net2272 *dev; | |
363 | unsigned stopped = ep->stopped; | |
364 | ||
365 | if (ep->num == 0) { | |
366 | if (ep->dev->protocol_stall) { | |
367 | ep->stopped = 1; | |
368 | set_halt(ep); | |
369 | } | |
370 | allow_status(ep); | |
371 | } | |
372 | ||
373 | list_del_init(&req->queue); | |
374 | ||
375 | if (req->req.status == -EINPROGRESS) | |
376 | req->req.status = status; | |
377 | else | |
378 | status = req->req.status; | |
379 | ||
380 | dev = ep->dev; | |
af93f2c7 FB |
381 | if (use_dma && ep->dma) |
382 | usb_gadget_unmap_request(&dev->gadget, &req->req, | |
383 | ep->is_in); | |
ceb80363 SL |
384 | |
385 | if (status && status != -ESHUTDOWN) | |
386 | dev_vdbg(dev->dev, "complete %s req %p stat %d len %u/%u buf %p\n", | |
387 | ep->ep.name, &req->req, status, | |
388 | req->req.actual, req->req.length, req->req.buf); | |
389 | ||
390 | /* don't modify queue heads during completion callback */ | |
391 | ep->stopped = 1; | |
392 | spin_unlock(&dev->lock); | |
304f7e5e | 393 | usb_gadget_giveback_request(&ep->ep, &req->req); |
ceb80363 SL |
394 | spin_lock(&dev->lock); |
395 | ep->stopped = stopped; | |
396 | } | |
397 | ||
398 | static int | |
399 | net2272_write_packet(struct net2272_ep *ep, u8 *buf, | |
400 | struct net2272_request *req, unsigned max) | |
401 | { | |
402 | u16 __iomem *ep_data = net2272_reg_addr(ep->dev, EP_DATA); | |
403 | u16 *bufp; | |
404 | unsigned length, count; | |
405 | u8 tmp; | |
406 | ||
407 | length = min(req->req.length - req->req.actual, max); | |
408 | req->req.actual += length; | |
409 | ||
410 | dev_vdbg(ep->dev->dev, "write packet %s req %p max %u len %u avail %u\n", | |
411 | ep->ep.name, req, max, length, | |
412 | (net2272_ep_read(ep, EP_AVAIL1) << 8) | net2272_ep_read(ep, EP_AVAIL0)); | |
413 | ||
414 | count = length; | |
415 | bufp = (u16 *)buf; | |
416 | ||
417 | while (likely(count >= 2)) { | |
418 | /* no byte-swap required; chip endian set during init */ | |
419 | writew(*bufp++, ep_data); | |
420 | count -= 2; | |
421 | } | |
422 | buf = (u8 *)bufp; | |
423 | ||
424 | /* write final byte by placing the NET2272 into 8-bit mode */ | |
425 | if (unlikely(count)) { | |
426 | tmp = net2272_read(ep->dev, LOCCTL); | |
427 | net2272_write(ep->dev, LOCCTL, tmp & ~(1 << DATA_WIDTH)); | |
428 | writeb(*buf, ep_data); | |
429 | net2272_write(ep->dev, LOCCTL, tmp); | |
430 | } | |
431 | return length; | |
432 | } | |
433 | ||
434 | /* returns: 0: still running, 1: completed, negative: errno */ | |
435 | static int | |
436 | net2272_write_fifo(struct net2272_ep *ep, struct net2272_request *req) | |
437 | { | |
438 | u8 *buf; | |
439 | unsigned count, max; | |
440 | int status; | |
441 | ||
442 | dev_vdbg(ep->dev->dev, "write_fifo %s actual %d len %d\n", | |
443 | ep->ep.name, req->req.actual, req->req.length); | |
444 | ||
445 | /* | |
446 | * Keep loading the endpoint until the final packet is loaded, | |
447 | * or the endpoint buffer is full. | |
448 | */ | |
449 | top: | |
450 | /* | |
451 | * Clear interrupt status | |
452 | * - Packet Transmitted interrupt will become set again when the | |
453 | * host successfully takes another packet | |
454 | */ | |
455 | net2272_ep_write(ep, EP_STAT0, (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)); | |
456 | while (!(net2272_ep_read(ep, EP_STAT0) & (1 << BUFFER_FULL))) { | |
457 | buf = req->req.buf + req->req.actual; | |
458 | prefetch(buf); | |
459 | ||
460 | /* force pagesel */ | |
461 | net2272_ep_read(ep, EP_STAT0); | |
462 | ||
463 | max = (net2272_ep_read(ep, EP_AVAIL1) << 8) | | |
464 | (net2272_ep_read(ep, EP_AVAIL0)); | |
465 | ||
466 | if (max < ep->ep.maxpacket) | |
467 | max = (net2272_ep_read(ep, EP_AVAIL1) << 8) | |
468 | | (net2272_ep_read(ep, EP_AVAIL0)); | |
469 | ||
470 | count = net2272_write_packet(ep, buf, req, max); | |
471 | /* see if we are done */ | |
472 | if (req->req.length == req->req.actual) { | |
473 | /* validate short or zlp packet */ | |
474 | if (count < ep->ep.maxpacket) | |
475 | set_fifo_bytecount(ep, 0); | |
476 | net2272_done(ep, req, 0); | |
477 | ||
478 | if (!list_empty(&ep->queue)) { | |
479 | req = list_entry(ep->queue.next, | |
480 | struct net2272_request, | |
481 | queue); | |
482 | status = net2272_kick_dma(ep, req); | |
483 | ||
484 | if (status < 0) | |
485 | if ((net2272_ep_read(ep, EP_STAT0) | |
486 | & (1 << BUFFER_EMPTY))) | |
487 | goto top; | |
488 | } | |
489 | return 1; | |
490 | } | |
491 | net2272_ep_write(ep, EP_STAT0, (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)); | |
492 | } | |
493 | return 0; | |
494 | } | |
495 | ||
496 | static void | |
497 | net2272_out_flush(struct net2272_ep *ep) | |
498 | { | |
499 | ASSERT_OUT_NAKING(ep); | |
500 | ||
501 | net2272_ep_write(ep, EP_STAT0, (1 << DATA_OUT_TOKEN_INTERRUPT) | |
502 | | (1 << DATA_PACKET_RECEIVED_INTERRUPT)); | |
503 | net2272_ep_write(ep, EP_STAT1, 1 << BUFFER_FLUSH); | |
504 | } | |
505 | ||
506 | static int | |
507 | net2272_read_packet(struct net2272_ep *ep, u8 *buf, | |
508 | struct net2272_request *req, unsigned avail) | |
509 | { | |
510 | u16 __iomem *ep_data = net2272_reg_addr(ep->dev, EP_DATA); | |
511 | unsigned is_short; | |
512 | u16 *bufp; | |
513 | ||
514 | req->req.actual += avail; | |
515 | ||
516 | dev_vdbg(ep->dev->dev, "read packet %s req %p len %u avail %u\n", | |
517 | ep->ep.name, req, avail, | |
518 | (net2272_ep_read(ep, EP_AVAIL1) << 8) | net2272_ep_read(ep, EP_AVAIL0)); | |
519 | ||
520 | is_short = (avail < ep->ep.maxpacket); | |
521 | ||
522 | if (unlikely(avail == 0)) { | |
523 | /* remove any zlp from the buffer */ | |
524 | (void)readw(ep_data); | |
525 | return is_short; | |
526 | } | |
527 | ||
528 | /* Ensure we get the final byte */ | |
529 | if (unlikely(avail % 2)) | |
530 | avail++; | |
531 | bufp = (u16 *)buf; | |
532 | ||
533 | do { | |
534 | *bufp++ = readw(ep_data); | |
535 | avail -= 2; | |
536 | } while (avail); | |
537 | ||
538 | /* | |
539 | * To avoid false endpoint available race condition must read | |
540 | * ep stat0 twice in the case of a short transfer | |
541 | */ | |
542 | if (net2272_ep_read(ep, EP_STAT0) & (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)) | |
543 | net2272_ep_read(ep, EP_STAT0); | |
544 | ||
545 | return is_short; | |
546 | } | |
547 | ||
548 | static int | |
549 | net2272_read_fifo(struct net2272_ep *ep, struct net2272_request *req) | |
550 | { | |
551 | u8 *buf; | |
552 | unsigned is_short; | |
553 | int count; | |
554 | int tmp; | |
555 | int cleanup = 0; | |
556 | int status = -1; | |
557 | ||
558 | dev_vdbg(ep->dev->dev, "read_fifo %s actual %d len %d\n", | |
559 | ep->ep.name, req->req.actual, req->req.length); | |
560 | ||
561 | top: | |
562 | do { | |
563 | buf = req->req.buf + req->req.actual; | |
564 | prefetchw(buf); | |
565 | ||
566 | count = (net2272_ep_read(ep, EP_AVAIL1) << 8) | |
567 | | net2272_ep_read(ep, EP_AVAIL0); | |
568 | ||
569 | net2272_ep_write(ep, EP_STAT0, | |
570 | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT) | | |
571 | (1 << DATA_PACKET_RECEIVED_INTERRUPT)); | |
572 | ||
573 | tmp = req->req.length - req->req.actual; | |
574 | ||
575 | if (count > tmp) { | |
576 | if ((tmp % ep->ep.maxpacket) != 0) { | |
577 | dev_err(ep->dev->dev, | |
578 | "%s out fifo %d bytes, expected %d\n", | |
579 | ep->ep.name, count, tmp); | |
580 | cleanup = 1; | |
581 | } | |
582 | count = (tmp > 0) ? tmp : 0; | |
583 | } | |
584 | ||
585 | is_short = net2272_read_packet(ep, buf, req, count); | |
586 | ||
587 | /* completion */ | |
588 | if (unlikely(cleanup || is_short || | |
589 | ((req->req.actual == req->req.length) | |
590 | && !req->req.zero))) { | |
591 | ||
592 | if (cleanup) { | |
593 | net2272_out_flush(ep); | |
594 | net2272_done(ep, req, -EOVERFLOW); | |
595 | } else | |
596 | net2272_done(ep, req, 0); | |
597 | ||
598 | /* re-initialize endpoint transfer registers | |
599 | * otherwise they may result in erroneous pre-validation | |
600 | * for subsequent control reads | |
601 | */ | |
602 | if (unlikely(ep->num == 0)) { | |
603 | net2272_ep_write(ep, EP_TRANSFER2, 0); | |
604 | net2272_ep_write(ep, EP_TRANSFER1, 0); | |
605 | net2272_ep_write(ep, EP_TRANSFER0, 0); | |
606 | } | |
607 | ||
608 | if (!list_empty(&ep->queue)) { | |
609 | req = list_entry(ep->queue.next, | |
610 | struct net2272_request, queue); | |
611 | status = net2272_kick_dma(ep, req); | |
612 | if ((status < 0) && | |
613 | !(net2272_ep_read(ep, EP_STAT0) & (1 << BUFFER_EMPTY))) | |
614 | goto top; | |
615 | } | |
616 | return 1; | |
617 | } | |
618 | } while (!(net2272_ep_read(ep, EP_STAT0) & (1 << BUFFER_EMPTY))); | |
619 | ||
620 | return 0; | |
621 | } | |
622 | ||
623 | static void | |
624 | net2272_pio_advance(struct net2272_ep *ep) | |
625 | { | |
626 | struct net2272_request *req; | |
627 | ||
628 | if (unlikely(list_empty(&ep->queue))) | |
629 | return; | |
630 | ||
631 | req = list_entry(ep->queue.next, struct net2272_request, queue); | |
632 | (ep->is_in ? net2272_write_fifo : net2272_read_fifo)(ep, req); | |
633 | } | |
634 | ||
635 | /* returns 0 on success, else negative errno */ | |
636 | static int | |
637 | net2272_request_dma(struct net2272 *dev, unsigned ep, u32 buf, | |
638 | unsigned len, unsigned dir) | |
639 | { | |
640 | dev_vdbg(dev->dev, "request_dma ep %d buf %08x len %d dir %d\n", | |
641 | ep, buf, len, dir); | |
642 | ||
643 | /* The NET2272 only supports a single dma channel */ | |
644 | if (dev->dma_busy) | |
645 | return -EBUSY; | |
646 | /* | |
647 | * EP_TRANSFER (used to determine the number of bytes received | |
648 | * in an OUT transfer) is 24 bits wide; don't ask for more than that. | |
649 | */ | |
650 | if ((dir == 1) && (len > 0x1000000)) | |
651 | return -EINVAL; | |
652 | ||
653 | dev->dma_busy = 1; | |
654 | ||
655 | /* initialize platform's dma */ | |
656 | #ifdef CONFIG_PCI | |
657 | /* NET2272 addr, buffer addr, length, etc. */ | |
658 | switch (dev->dev_id) { | |
659 | case PCI_DEVICE_ID_RDK1: | |
660 | /* Setup PLX 9054 DMA mode */ | |
661 | writel((1 << LOCAL_BUS_WIDTH) | | |
662 | (1 << TA_READY_INPUT_ENABLE) | | |
663 | (0 << LOCAL_BURST_ENABLE) | | |
664 | (1 << DONE_INTERRUPT_ENABLE) | | |
665 | (1 << LOCAL_ADDRESSING_MODE) | | |
666 | (1 << DEMAND_MODE) | | |
667 | (1 << DMA_EOT_ENABLE) | | |
668 | (1 << FAST_SLOW_TERMINATE_MODE_SELECT) | | |
669 | (1 << DMA_CHANNEL_INTERRUPT_SELECT), | |
670 | dev->rdk1.plx9054_base_addr + DMAMODE0); | |
671 | ||
672 | writel(0x100000, dev->rdk1.plx9054_base_addr + DMALADR0); | |
673 | writel(buf, dev->rdk1.plx9054_base_addr + DMAPADR0); | |
674 | writel(len, dev->rdk1.plx9054_base_addr + DMASIZ0); | |
675 | writel((dir << DIRECTION_OF_TRANSFER) | | |
676 | (1 << INTERRUPT_AFTER_TERMINAL_COUNT), | |
677 | dev->rdk1.plx9054_base_addr + DMADPR0); | |
678 | writel((1 << LOCAL_DMA_CHANNEL_0_INTERRUPT_ENABLE) | | |
679 | readl(dev->rdk1.plx9054_base_addr + INTCSR), | |
680 | dev->rdk1.plx9054_base_addr + INTCSR); | |
681 | ||
682 | break; | |
683 | } | |
684 | #endif | |
685 | ||
686 | net2272_write(dev, DMAREQ, | |
687 | (0 << DMA_BUFFER_VALID) | | |
688 | (1 << DMA_REQUEST_ENABLE) | | |
689 | (1 << DMA_CONTROL_DACK) | | |
690 | (dev->dma_eot_polarity << EOT_POLARITY) | | |
691 | (dev->dma_dack_polarity << DACK_POLARITY) | | |
692 | (dev->dma_dreq_polarity << DREQ_POLARITY) | | |
693 | ((ep >> 1) << DMA_ENDPOINT_SELECT)); | |
694 | ||
695 | (void) net2272_read(dev, SCRATCH); | |
696 | ||
697 | return 0; | |
698 | } | |
699 | ||
700 | static void | |
701 | net2272_start_dma(struct net2272 *dev) | |
702 | { | |
703 | /* start platform's dma controller */ | |
704 | #ifdef CONFIG_PCI | |
705 | switch (dev->dev_id) { | |
706 | case PCI_DEVICE_ID_RDK1: | |
707 | writeb((1 << CHANNEL_ENABLE) | (1 << CHANNEL_START), | |
708 | dev->rdk1.plx9054_base_addr + DMACSR0); | |
709 | break; | |
710 | } | |
711 | #endif | |
712 | } | |
713 | ||
714 | /* returns 0 on success, else negative errno */ | |
715 | static int | |
716 | net2272_kick_dma(struct net2272_ep *ep, struct net2272_request *req) | |
717 | { | |
718 | unsigned size; | |
719 | u8 tmp; | |
720 | ||
721 | if (!use_dma || (ep->num < 1) || (ep->num > 2) || !ep->dma) | |
722 | return -EINVAL; | |
723 | ||
724 | /* don't use dma for odd-length transfers | |
725 | * otherwise, we'd need to deal with the last byte with pio | |
726 | */ | |
727 | if (req->req.length & 1) | |
728 | return -EINVAL; | |
729 | ||
7b30d19a FB |
730 | dev_vdbg(ep->dev->dev, "kick_dma %s req %p dma %08llx\n", |
731 | ep->ep.name, req, (unsigned long long) req->req.dma); | |
ceb80363 SL |
732 | |
733 | net2272_ep_write(ep, EP_RSPSET, 1 << ALT_NAK_OUT_PACKETS); | |
734 | ||
735 | /* The NET2272 can only use DMA on one endpoint at a time */ | |
736 | if (ep->dev->dma_busy) | |
737 | return -EBUSY; | |
738 | ||
739 | /* Make sure we only DMA an even number of bytes (we'll use | |
740 | * pio to complete the transfer) | |
741 | */ | |
742 | size = req->req.length; | |
743 | size &= ~1; | |
744 | ||
745 | /* device-to-host transfer */ | |
746 | if (ep->is_in) { | |
747 | /* initialize platform's dma controller */ | |
748 | if (net2272_request_dma(ep->dev, ep->num, req->req.dma, size, 0)) | |
749 | /* unable to obtain DMA channel; return error and use pio mode */ | |
750 | return -EBUSY; | |
751 | req->req.actual += size; | |
752 | ||
753 | /* host-to-device transfer */ | |
754 | } else { | |
755 | tmp = net2272_ep_read(ep, EP_STAT0); | |
756 | ||
757 | /* initialize platform's dma controller */ | |
758 | if (net2272_request_dma(ep->dev, ep->num, req->req.dma, size, 1)) | |
759 | /* unable to obtain DMA channel; return error and use pio mode */ | |
760 | return -EBUSY; | |
761 | ||
762 | if (!(tmp & (1 << BUFFER_EMPTY))) | |
763 | ep->not_empty = 1; | |
764 | else | |
765 | ep->not_empty = 0; | |
766 | ||
767 | ||
768 | /* allow the endpoint's buffer to fill */ | |
769 | net2272_ep_write(ep, EP_RSPCLR, 1 << ALT_NAK_OUT_PACKETS); | |
770 | ||
771 | /* this transfer completed and data's already in the fifo | |
772 | * return error so pio gets used. | |
773 | */ | |
774 | if (tmp & (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)) { | |
775 | ||
776 | /* deassert dreq */ | |
777 | net2272_write(ep->dev, DMAREQ, | |
778 | (0 << DMA_BUFFER_VALID) | | |
779 | (0 << DMA_REQUEST_ENABLE) | | |
780 | (1 << DMA_CONTROL_DACK) | | |
781 | (ep->dev->dma_eot_polarity << EOT_POLARITY) | | |
782 | (ep->dev->dma_dack_polarity << DACK_POLARITY) | | |
783 | (ep->dev->dma_dreq_polarity << DREQ_POLARITY) | | |
784 | ((ep->num >> 1) << DMA_ENDPOINT_SELECT)); | |
785 | ||
786 | return -EBUSY; | |
787 | } | |
788 | } | |
789 | ||
790 | /* Don't use per-packet interrupts: use dma interrupts only */ | |
791 | net2272_ep_write(ep, EP_IRQENB, 0); | |
792 | ||
793 | net2272_start_dma(ep->dev); | |
794 | ||
795 | return 0; | |
796 | } | |
797 | ||
798 | static void net2272_cancel_dma(struct net2272 *dev) | |
799 | { | |
800 | #ifdef CONFIG_PCI | |
801 | switch (dev->dev_id) { | |
802 | case PCI_DEVICE_ID_RDK1: | |
803 | writeb(0, dev->rdk1.plx9054_base_addr + DMACSR0); | |
804 | writeb(1 << CHANNEL_ABORT, dev->rdk1.plx9054_base_addr + DMACSR0); | |
805 | while (!(readb(dev->rdk1.plx9054_base_addr + DMACSR0) & | |
806 | (1 << CHANNEL_DONE))) | |
807 | continue; /* wait for dma to stabalize */ | |
808 | ||
809 | /* dma abort generates an interrupt */ | |
810 | writeb(1 << CHANNEL_CLEAR_INTERRUPT, | |
811 | dev->rdk1.plx9054_base_addr + DMACSR0); | |
812 | break; | |
813 | } | |
814 | #endif | |
815 | ||
816 | dev->dma_busy = 0; | |
817 | } | |
818 | ||
819 | /*---------------------------------------------------------------------------*/ | |
820 | ||
821 | static int | |
822 | net2272_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) | |
823 | { | |
824 | struct net2272_request *req; | |
825 | struct net2272_ep *ep; | |
826 | struct net2272 *dev; | |
827 | unsigned long flags; | |
828 | int status = -1; | |
829 | u8 s; | |
830 | ||
831 | req = container_of(_req, struct net2272_request, req); | |
832 | if (!_req || !_req->complete || !_req->buf | |
833 | || !list_empty(&req->queue)) | |
834 | return -EINVAL; | |
835 | ep = container_of(_ep, struct net2272_ep, ep); | |
836 | if (!_ep || (!ep->desc && ep->num != 0)) | |
837 | return -EINVAL; | |
838 | dev = ep->dev; | |
839 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) | |
840 | return -ESHUTDOWN; | |
841 | ||
842 | /* set up dma mapping in case the caller didn't */ | |
af93f2c7 FB |
843 | if (use_dma && ep->dma) { |
844 | status = usb_gadget_map_request(&dev->gadget, _req, | |
845 | ep->is_in); | |
846 | if (status) | |
847 | return status; | |
ceb80363 SL |
848 | } |
849 | ||
7b30d19a | 850 | dev_vdbg(dev->dev, "%s queue req %p, len %d buf %p dma %08llx %s\n", |
ceb80363 | 851 | _ep->name, _req, _req->length, _req->buf, |
7b30d19a | 852 | (unsigned long long) _req->dma, _req->zero ? "zero" : "!zero"); |
ceb80363 SL |
853 | |
854 | spin_lock_irqsave(&dev->lock, flags); | |
855 | ||
856 | _req->status = -EINPROGRESS; | |
857 | _req->actual = 0; | |
858 | ||
859 | /* kickstart this i/o queue? */ | |
860 | if (list_empty(&ep->queue) && !ep->stopped) { | |
861 | /* maybe there's no control data, just status ack */ | |
862 | if (ep->num == 0 && _req->length == 0) { | |
863 | net2272_done(ep, req, 0); | |
864 | dev_vdbg(dev->dev, "%s status ack\n", ep->ep.name); | |
865 | goto done; | |
866 | } | |
867 | ||
868 | /* Return zlp, don't let it block subsequent packets */ | |
869 | s = net2272_ep_read(ep, EP_STAT0); | |
870 | if (s & (1 << BUFFER_EMPTY)) { | |
871 | /* Buffer is empty check for a blocking zlp, handle it */ | |
872 | if ((s & (1 << NAK_OUT_PACKETS)) && | |
873 | net2272_ep_read(ep, EP_STAT1) & (1 << LOCAL_OUT_ZLP)) { | |
874 | dev_dbg(dev->dev, "WARNING: returning ZLP short packet termination!\n"); | |
875 | /* | |
876 | * Request is going to terminate with a short packet ... | |
877 | * hope the client is ready for it! | |
878 | */ | |
879 | status = net2272_read_fifo(ep, req); | |
880 | /* clear short packet naking */ | |
881 | net2272_ep_write(ep, EP_STAT0, (1 << NAK_OUT_PACKETS)); | |
882 | goto done; | |
883 | } | |
884 | } | |
885 | ||
886 | /* try dma first */ | |
887 | status = net2272_kick_dma(ep, req); | |
888 | ||
889 | if (status < 0) { | |
890 | /* dma failed (most likely in use by another endpoint) | |
891 | * fallback to pio | |
892 | */ | |
893 | status = 0; | |
894 | ||
895 | if (ep->is_in) | |
896 | status = net2272_write_fifo(ep, req); | |
897 | else { | |
898 | s = net2272_ep_read(ep, EP_STAT0); | |
899 | if ((s & (1 << BUFFER_EMPTY)) == 0) | |
900 | status = net2272_read_fifo(ep, req); | |
901 | } | |
902 | ||
903 | if (unlikely(status != 0)) { | |
904 | if (status > 0) | |
905 | status = 0; | |
906 | req = NULL; | |
907 | } | |
908 | } | |
909 | } | |
69147121 | 910 | if (likely(req)) |
ceb80363 SL |
911 | list_add_tail(&req->queue, &ep->queue); |
912 | ||
913 | if (likely(!list_empty(&ep->queue))) | |
914 | net2272_ep_write(ep, EP_RSPCLR, 1 << ALT_NAK_OUT_PACKETS); | |
915 | done: | |
916 | spin_unlock_irqrestore(&dev->lock, flags); | |
917 | ||
918 | return 0; | |
919 | } | |
920 | ||
921 | /* dequeue ALL requests */ | |
922 | static void | |
923 | net2272_dequeue_all(struct net2272_ep *ep) | |
924 | { | |
925 | struct net2272_request *req; | |
926 | ||
927 | /* called with spinlock held */ | |
928 | ep->stopped = 1; | |
929 | ||
930 | while (!list_empty(&ep->queue)) { | |
931 | req = list_entry(ep->queue.next, | |
932 | struct net2272_request, | |
933 | queue); | |
934 | net2272_done(ep, req, -ESHUTDOWN); | |
935 | } | |
936 | } | |
937 | ||
938 | /* dequeue JUST ONE request */ | |
939 | static int | |
940 | net2272_dequeue(struct usb_ep *_ep, struct usb_request *_req) | |
941 | { | |
942 | struct net2272_ep *ep; | |
943 | struct net2272_request *req; | |
944 | unsigned long flags; | |
945 | int stopped; | |
946 | ||
947 | ep = container_of(_ep, struct net2272_ep, ep); | |
948 | if (!_ep || (!ep->desc && ep->num != 0) || !_req) | |
949 | return -EINVAL; | |
950 | ||
951 | spin_lock_irqsave(&ep->dev->lock, flags); | |
952 | stopped = ep->stopped; | |
953 | ep->stopped = 1; | |
954 | ||
955 | /* make sure it's still queued on this endpoint */ | |
956 | list_for_each_entry(req, &ep->queue, queue) { | |
957 | if (&req->req == _req) | |
958 | break; | |
959 | } | |
960 | if (&req->req != _req) { | |
961 | spin_unlock_irqrestore(&ep->dev->lock, flags); | |
962 | return -EINVAL; | |
963 | } | |
964 | ||
965 | /* queue head may be partially complete */ | |
966 | if (ep->queue.next == &req->queue) { | |
967 | dev_dbg(ep->dev->dev, "unlink (%s) pio\n", _ep->name); | |
968 | net2272_done(ep, req, -ECONNRESET); | |
969 | } | |
970 | req = NULL; | |
971 | ep->stopped = stopped; | |
972 | ||
973 | spin_unlock_irqrestore(&ep->dev->lock, flags); | |
974 | return 0; | |
975 | } | |
976 | ||
977 | /*---------------------------------------------------------------------------*/ | |
978 | ||
979 | static int | |
980 | net2272_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged) | |
981 | { | |
982 | struct net2272_ep *ep; | |
983 | unsigned long flags; | |
984 | int ret = 0; | |
985 | ||
986 | ep = container_of(_ep, struct net2272_ep, ep); | |
987 | if (!_ep || (!ep->desc && ep->num != 0)) | |
988 | return -EINVAL; | |
989 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) | |
990 | return -ESHUTDOWN; | |
991 | if (ep->desc /* not ep0 */ && usb_endpoint_xfer_isoc(ep->desc)) | |
992 | return -EINVAL; | |
993 | ||
994 | spin_lock_irqsave(&ep->dev->lock, flags); | |
995 | if (!list_empty(&ep->queue)) | |
996 | ret = -EAGAIN; | |
997 | else if (ep->is_in && value && net2272_fifo_status(_ep) != 0) | |
998 | ret = -EAGAIN; | |
999 | else { | |
1000 | dev_vdbg(ep->dev->dev, "%s %s %s\n", _ep->name, | |
1001 | value ? "set" : "clear", | |
1002 | wedged ? "wedge" : "halt"); | |
1003 | /* set/clear */ | |
1004 | if (value) { | |
1005 | if (ep->num == 0) | |
1006 | ep->dev->protocol_stall = 1; | |
1007 | else | |
1008 | set_halt(ep); | |
1009 | if (wedged) | |
1010 | ep->wedged = 1; | |
1011 | } else { | |
1012 | clear_halt(ep); | |
1013 | ep->wedged = 0; | |
1014 | } | |
1015 | } | |
1016 | spin_unlock_irqrestore(&ep->dev->lock, flags); | |
1017 | ||
1018 | return ret; | |
1019 | } | |
1020 | ||
1021 | static int | |
1022 | net2272_set_halt(struct usb_ep *_ep, int value) | |
1023 | { | |
1024 | return net2272_set_halt_and_wedge(_ep, value, 0); | |
1025 | } | |
1026 | ||
1027 | static int | |
1028 | net2272_set_wedge(struct usb_ep *_ep) | |
1029 | { | |
1030 | if (!_ep || _ep->name == ep0name) | |
1031 | return -EINVAL; | |
1032 | return net2272_set_halt_and_wedge(_ep, 1, 1); | |
1033 | } | |
1034 | ||
1035 | static int | |
1036 | net2272_fifo_status(struct usb_ep *_ep) | |
1037 | { | |
1038 | struct net2272_ep *ep; | |
1039 | u16 avail; | |
1040 | ||
1041 | ep = container_of(_ep, struct net2272_ep, ep); | |
1042 | if (!_ep || (!ep->desc && ep->num != 0)) | |
1043 | return -ENODEV; | |
1044 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1045 | return -ESHUTDOWN; | |
1046 | ||
1047 | avail = net2272_ep_read(ep, EP_AVAIL1) << 8; | |
1048 | avail |= net2272_ep_read(ep, EP_AVAIL0); | |
1049 | if (avail > ep->fifo_size) | |
1050 | return -EOVERFLOW; | |
1051 | if (ep->is_in) | |
1052 | avail = ep->fifo_size - avail; | |
1053 | return avail; | |
1054 | } | |
1055 | ||
1056 | static void | |
1057 | net2272_fifo_flush(struct usb_ep *_ep) | |
1058 | { | |
1059 | struct net2272_ep *ep; | |
1060 | ||
1061 | ep = container_of(_ep, struct net2272_ep, ep); | |
1062 | if (!_ep || (!ep->desc && ep->num != 0)) | |
1063 | return; | |
1064 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1065 | return; | |
1066 | ||
1067 | net2272_ep_write(ep, EP_STAT1, 1 << BUFFER_FLUSH); | |
1068 | } | |
1069 | ||
1070 | static struct usb_ep_ops net2272_ep_ops = { | |
1071 | .enable = net2272_enable, | |
1072 | .disable = net2272_disable, | |
1073 | ||
1074 | .alloc_request = net2272_alloc_request, | |
1075 | .free_request = net2272_free_request, | |
1076 | ||
1077 | .queue = net2272_queue, | |
1078 | .dequeue = net2272_dequeue, | |
1079 | ||
1080 | .set_halt = net2272_set_halt, | |
1081 | .set_wedge = net2272_set_wedge, | |
1082 | .fifo_status = net2272_fifo_status, | |
1083 | .fifo_flush = net2272_fifo_flush, | |
1084 | }; | |
1085 | ||
1086 | /*---------------------------------------------------------------------------*/ | |
1087 | ||
1088 | static int | |
1089 | net2272_get_frame(struct usb_gadget *_gadget) | |
1090 | { | |
1091 | struct net2272 *dev; | |
1092 | unsigned long flags; | |
1093 | u16 ret; | |
1094 | ||
1095 | if (!_gadget) | |
1096 | return -ENODEV; | |
1097 | dev = container_of(_gadget, struct net2272, gadget); | |
1098 | spin_lock_irqsave(&dev->lock, flags); | |
1099 | ||
1100 | ret = net2272_read(dev, FRAME1) << 8; | |
1101 | ret |= net2272_read(dev, FRAME0); | |
1102 | ||
1103 | spin_unlock_irqrestore(&dev->lock, flags); | |
1104 | return ret; | |
1105 | } | |
1106 | ||
1107 | static int | |
1108 | net2272_wakeup(struct usb_gadget *_gadget) | |
1109 | { | |
1110 | struct net2272 *dev; | |
1111 | u8 tmp; | |
1112 | unsigned long flags; | |
1113 | ||
1114 | if (!_gadget) | |
1115 | return 0; | |
1116 | dev = container_of(_gadget, struct net2272, gadget); | |
1117 | ||
1118 | spin_lock_irqsave(&dev->lock, flags); | |
1119 | tmp = net2272_read(dev, USBCTL0); | |
1120 | if (tmp & (1 << IO_WAKEUP_ENABLE)) | |
1121 | net2272_write(dev, USBCTL1, (1 << GENERATE_RESUME)); | |
1122 | ||
1123 | spin_unlock_irqrestore(&dev->lock, flags); | |
1124 | ||
1125 | return 0; | |
1126 | } | |
1127 | ||
1128 | static int | |
1129 | net2272_set_selfpowered(struct usb_gadget *_gadget, int value) | |
1130 | { | |
ceb80363 SL |
1131 | if (!_gadget) |
1132 | return -ENODEV; | |
ceb80363 | 1133 | |
d4a1c479 | 1134 | _gadget->is_selfpowered = (value != 0); |
ceb80363 SL |
1135 | |
1136 | return 0; | |
1137 | } | |
1138 | ||
1139 | static int | |
1140 | net2272_pullup(struct usb_gadget *_gadget, int is_on) | |
1141 | { | |
1142 | struct net2272 *dev; | |
1143 | u8 tmp; | |
1144 | unsigned long flags; | |
1145 | ||
1146 | if (!_gadget) | |
1147 | return -ENODEV; | |
1148 | dev = container_of(_gadget, struct net2272, gadget); | |
1149 | ||
1150 | spin_lock_irqsave(&dev->lock, flags); | |
1151 | tmp = net2272_read(dev, USBCTL0); | |
1152 | dev->softconnect = (is_on != 0); | |
1153 | if (is_on) | |
1154 | tmp |= (1 << USB_DETECT_ENABLE); | |
1155 | else | |
1156 | tmp &= ~(1 << USB_DETECT_ENABLE); | |
1157 | net2272_write(dev, USBCTL0, tmp); | |
1158 | spin_unlock_irqrestore(&dev->lock, flags); | |
1159 | ||
1160 | return 0; | |
1161 | } | |
1162 | ||
96f8db6a FB |
1163 | static int net2272_start(struct usb_gadget *_gadget, |
1164 | struct usb_gadget_driver *driver); | |
22835b80 | 1165 | static int net2272_stop(struct usb_gadget *_gadget); |
0f91349b | 1166 | |
ceb80363 | 1167 | static const struct usb_gadget_ops net2272_ops = { |
96f8db6a FB |
1168 | .get_frame = net2272_get_frame, |
1169 | .wakeup = net2272_wakeup, | |
ceb80363 | 1170 | .set_selfpowered = net2272_set_selfpowered, |
96f8db6a FB |
1171 | .pullup = net2272_pullup, |
1172 | .udc_start = net2272_start, | |
1173 | .udc_stop = net2272_stop, | |
ceb80363 SL |
1174 | }; |
1175 | ||
1176 | /*---------------------------------------------------------------------------*/ | |
1177 | ||
1178 | static ssize_t | |
ce26bd23 | 1179 | registers_show(struct device *_dev, struct device_attribute *attr, char *buf) |
ceb80363 SL |
1180 | { |
1181 | struct net2272 *dev; | |
1182 | char *next; | |
1183 | unsigned size, t; | |
1184 | unsigned long flags; | |
1185 | u8 t1, t2; | |
1186 | int i; | |
1187 | const char *s; | |
1188 | ||
1189 | dev = dev_get_drvdata(_dev); | |
1190 | next = buf; | |
1191 | size = PAGE_SIZE; | |
1192 | spin_lock_irqsave(&dev->lock, flags); | |
1193 | ||
1194 | if (dev->driver) | |
1195 | s = dev->driver->driver.name; | |
1196 | else | |
1197 | s = "(none)"; | |
1198 | ||
1199 | /* Main Control Registers */ | |
1200 | t = scnprintf(next, size, "%s version %s," | |
1201 | "chiprev %02x, locctl %02x\n" | |
1202 | "irqenb0 %02x irqenb1 %02x " | |
1203 | "irqstat0 %02x irqstat1 %02x\n", | |
1204 | driver_name, driver_vers, dev->chiprev, | |
1205 | net2272_read(dev, LOCCTL), | |
1206 | net2272_read(dev, IRQENB0), | |
1207 | net2272_read(dev, IRQENB1), | |
1208 | net2272_read(dev, IRQSTAT0), | |
1209 | net2272_read(dev, IRQSTAT1)); | |
1210 | size -= t; | |
1211 | next += t; | |
1212 | ||
1213 | /* DMA */ | |
1214 | t1 = net2272_read(dev, DMAREQ); | |
1215 | t = scnprintf(next, size, "\ndmareq %02x: %s %s%s%s%s\n", | |
1216 | t1, ep_name[(t1 & 0x01) + 1], | |
1217 | t1 & (1 << DMA_CONTROL_DACK) ? "dack " : "", | |
1218 | t1 & (1 << DMA_REQUEST_ENABLE) ? "reqenb " : "", | |
1219 | t1 & (1 << DMA_REQUEST) ? "req " : "", | |
1220 | t1 & (1 << DMA_BUFFER_VALID) ? "valid " : ""); | |
1221 | size -= t; | |
1222 | next += t; | |
1223 | ||
1224 | /* USB Control Registers */ | |
1225 | t1 = net2272_read(dev, USBCTL1); | |
1226 | if (t1 & (1 << VBUS_PIN)) { | |
1227 | if (t1 & (1 << USB_HIGH_SPEED)) | |
1228 | s = "high speed"; | |
1229 | else if (dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1230 | s = "powered"; | |
1231 | else | |
1232 | s = "full speed"; | |
1233 | } else | |
1234 | s = "not attached"; | |
1235 | t = scnprintf(next, size, | |
1236 | "usbctl0 %02x usbctl1 %02x addr 0x%02x (%s)\n", | |
1237 | net2272_read(dev, USBCTL0), t1, | |
1238 | net2272_read(dev, OURADDR), s); | |
1239 | size -= t; | |
1240 | next += t; | |
1241 | ||
1242 | /* Endpoint Registers */ | |
1243 | for (i = 0; i < 4; ++i) { | |
1244 | struct net2272_ep *ep; | |
1245 | ||
1246 | ep = &dev->ep[i]; | |
1247 | if (i && !ep->desc) | |
1248 | continue; | |
1249 | ||
1250 | t1 = net2272_ep_read(ep, EP_CFG); | |
1251 | t2 = net2272_ep_read(ep, EP_RSPSET); | |
1252 | t = scnprintf(next, size, | |
1253 | "\n%s\tcfg %02x rsp (%02x) %s%s%s%s%s%s%s%s" | |
1254 | "irqenb %02x\n", | |
1255 | ep->ep.name, t1, t2, | |
1256 | (t2 & (1 << ALT_NAK_OUT_PACKETS)) ? "NAK " : "", | |
1257 | (t2 & (1 << HIDE_STATUS_PHASE)) ? "hide " : "", | |
1258 | (t2 & (1 << AUTOVALIDATE)) ? "auto " : "", | |
1259 | (t2 & (1 << INTERRUPT_MODE)) ? "interrupt " : "", | |
1260 | (t2 & (1 << CONTROL_STATUS_PHASE_HANDSHAKE)) ? "status " : "", | |
1261 | (t2 & (1 << NAK_OUT_PACKETS_MODE)) ? "NAKmode " : "", | |
1262 | (t2 & (1 << ENDPOINT_TOGGLE)) ? "DATA1 " : "DATA0 ", | |
1263 | (t2 & (1 << ENDPOINT_HALT)) ? "HALT " : "", | |
1264 | net2272_ep_read(ep, EP_IRQENB)); | |
1265 | size -= t; | |
1266 | next += t; | |
1267 | ||
1268 | t = scnprintf(next, size, | |
1269 | "\tstat0 %02x stat1 %02x avail %04x " | |
1270 | "(ep%d%s-%s)%s\n", | |
1271 | net2272_ep_read(ep, EP_STAT0), | |
1272 | net2272_ep_read(ep, EP_STAT1), | |
1273 | (net2272_ep_read(ep, EP_AVAIL1) << 8) | net2272_ep_read(ep, EP_AVAIL0), | |
1274 | t1 & 0x0f, | |
1275 | ep->is_in ? "in" : "out", | |
1276 | type_string(t1 >> 5), | |
1277 | ep->stopped ? "*" : ""); | |
1278 | size -= t; | |
1279 | next += t; | |
1280 | ||
1281 | t = scnprintf(next, size, | |
1282 | "\tep_transfer %06x\n", | |
1283 | ((net2272_ep_read(ep, EP_TRANSFER2) & 0xff) << 16) | | |
1284 | ((net2272_ep_read(ep, EP_TRANSFER1) & 0xff) << 8) | | |
1285 | ((net2272_ep_read(ep, EP_TRANSFER0) & 0xff))); | |
1286 | size -= t; | |
1287 | next += t; | |
1288 | ||
1289 | t1 = net2272_ep_read(ep, EP_BUFF_STATES) & 0x03; | |
1290 | t2 = (net2272_ep_read(ep, EP_BUFF_STATES) >> 2) & 0x03; | |
1291 | t = scnprintf(next, size, | |
1292 | "\tbuf-a %s buf-b %s\n", | |
1293 | buf_state_string(t1), | |
1294 | buf_state_string(t2)); | |
1295 | size -= t; | |
1296 | next += t; | |
1297 | } | |
1298 | ||
1299 | spin_unlock_irqrestore(&dev->lock, flags); | |
1300 | ||
1301 | return PAGE_SIZE - size; | |
1302 | } | |
ce26bd23 | 1303 | static DEVICE_ATTR_RO(registers); |
ceb80363 SL |
1304 | |
1305 | /*---------------------------------------------------------------------------*/ | |
1306 | ||
1307 | static void | |
1308 | net2272_set_fifo_mode(struct net2272 *dev, int mode) | |
1309 | { | |
1310 | u8 tmp; | |
1311 | ||
1312 | tmp = net2272_read(dev, LOCCTL) & 0x3f; | |
1313 | tmp |= (mode << 6); | |
1314 | net2272_write(dev, LOCCTL, tmp); | |
1315 | ||
1316 | INIT_LIST_HEAD(&dev->gadget.ep_list); | |
1317 | ||
1318 | /* always ep-a, ep-c ... maybe not ep-b */ | |
1319 | list_add_tail(&dev->ep[1].ep.ep_list, &dev->gadget.ep_list); | |
1320 | ||
1321 | switch (mode) { | |
1322 | case 0: | |
1323 | list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list); | |
1324 | dev->ep[1].fifo_size = dev->ep[2].fifo_size = 512; | |
1325 | break; | |
1326 | case 1: | |
1327 | list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list); | |
1328 | dev->ep[1].fifo_size = 1024; | |
1329 | dev->ep[2].fifo_size = 512; | |
1330 | break; | |
1331 | case 2: | |
1332 | list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list); | |
1333 | dev->ep[1].fifo_size = dev->ep[2].fifo_size = 1024; | |
1334 | break; | |
1335 | case 3: | |
1336 | dev->ep[1].fifo_size = 1024; | |
1337 | break; | |
1338 | } | |
1339 | ||
1340 | /* ep-c is always 2 512 byte buffers */ | |
1341 | list_add_tail(&dev->ep[3].ep.ep_list, &dev->gadget.ep_list); | |
1342 | dev->ep[3].fifo_size = 512; | |
1343 | } | |
1344 | ||
1345 | /*---------------------------------------------------------------------------*/ | |
1346 | ||
ceb80363 SL |
1347 | static void |
1348 | net2272_usb_reset(struct net2272 *dev) | |
1349 | { | |
1350 | dev->gadget.speed = USB_SPEED_UNKNOWN; | |
1351 | ||
1352 | net2272_cancel_dma(dev); | |
1353 | ||
1354 | net2272_write(dev, IRQENB0, 0); | |
1355 | net2272_write(dev, IRQENB1, 0); | |
1356 | ||
1357 | /* clear irq state */ | |
1358 | net2272_write(dev, IRQSTAT0, 0xff); | |
1359 | net2272_write(dev, IRQSTAT1, ~(1 << SUSPEND_REQUEST_INTERRUPT)); | |
1360 | ||
1361 | net2272_write(dev, DMAREQ, | |
1362 | (0 << DMA_BUFFER_VALID) | | |
1363 | (0 << DMA_REQUEST_ENABLE) | | |
1364 | (1 << DMA_CONTROL_DACK) | | |
1365 | (dev->dma_eot_polarity << EOT_POLARITY) | | |
1366 | (dev->dma_dack_polarity << DACK_POLARITY) | | |
1367 | (dev->dma_dreq_polarity << DREQ_POLARITY) | | |
1368 | ((dma_ep >> 1) << DMA_ENDPOINT_SELECT)); | |
1369 | ||
1370 | net2272_cancel_dma(dev); | |
1371 | net2272_set_fifo_mode(dev, (fifo_mode <= 3) ? fifo_mode : 0); | |
1372 | ||
1373 | /* Set the NET2272 ep fifo data width to 16-bit mode and for correct byte swapping | |
1374 | * note that the higher level gadget drivers are expected to convert data to little endian. | |
1375 | * Enable byte swap for your local bus/cpu if needed by setting BYTE_SWAP in LOCCTL here | |
1376 | */ | |
1377 | net2272_write(dev, LOCCTL, net2272_read(dev, LOCCTL) | (1 << DATA_WIDTH)); | |
1378 | net2272_write(dev, LOCCTL1, (dma_mode << DMA_MODE)); | |
1379 | } | |
1380 | ||
1381 | static void | |
1382 | net2272_usb_reinit(struct net2272 *dev) | |
1383 | { | |
1384 | int i; | |
1385 | ||
1386 | /* basic endpoint init */ | |
1387 | for (i = 0; i < 4; ++i) { | |
1388 | struct net2272_ep *ep = &dev->ep[i]; | |
1389 | ||
1390 | ep->ep.name = ep_name[i]; | |
1391 | ep->dev = dev; | |
1392 | ep->num = i; | |
1393 | ep->not_empty = 0; | |
1394 | ||
1395 | if (use_dma && ep->num == dma_ep) | |
1396 | ep->dma = 1; | |
1397 | ||
1398 | if (i > 0 && i <= 3) | |
1399 | ep->fifo_size = 512; | |
1400 | else | |
1401 | ep->fifo_size = 64; | |
1402 | net2272_ep_reset(ep); | |
f95aec51 RB |
1403 | |
1404 | if (i == 0) { | |
1405 | ep->ep.caps.type_control = true; | |
1406 | } else { | |
1407 | ep->ep.caps.type_iso = true; | |
1408 | ep->ep.caps.type_bulk = true; | |
1409 | ep->ep.caps.type_int = true; | |
1410 | } | |
1411 | ||
1412 | ep->ep.caps.dir_in = true; | |
1413 | ep->ep.caps.dir_out = true; | |
ceb80363 | 1414 | } |
e117e742 | 1415 | usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 64); |
ceb80363 SL |
1416 | |
1417 | dev->gadget.ep0 = &dev->ep[0].ep; | |
1418 | dev->ep[0].stopped = 0; | |
1419 | INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); | |
1420 | } | |
1421 | ||
1422 | static void | |
1423 | net2272_ep0_start(struct net2272 *dev) | |
1424 | { | |
1425 | struct net2272_ep *ep0 = &dev->ep[0]; | |
1426 | ||
1427 | net2272_ep_write(ep0, EP_RSPSET, | |
1428 | (1 << NAK_OUT_PACKETS_MODE) | | |
1429 | (1 << ALT_NAK_OUT_PACKETS)); | |
1430 | net2272_ep_write(ep0, EP_RSPCLR, | |
1431 | (1 << HIDE_STATUS_PHASE) | | |
1432 | (1 << CONTROL_STATUS_PHASE_HANDSHAKE)); | |
1433 | net2272_write(dev, USBCTL0, | |
1434 | (dev->softconnect << USB_DETECT_ENABLE) | | |
1435 | (1 << USB_ROOT_PORT_WAKEUP_ENABLE) | | |
1436 | (1 << IO_WAKEUP_ENABLE)); | |
1437 | net2272_write(dev, IRQENB0, | |
1438 | (1 << SETUP_PACKET_INTERRUPT_ENABLE) | | |
1439 | (1 << ENDPOINT_0_INTERRUPT_ENABLE) | | |
1440 | (1 << DMA_DONE_INTERRUPT_ENABLE)); | |
1441 | net2272_write(dev, IRQENB1, | |
1442 | (1 << VBUS_INTERRUPT_ENABLE) | | |
1443 | (1 << ROOT_PORT_RESET_INTERRUPT_ENABLE) | | |
1444 | (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE)); | |
1445 | } | |
1446 | ||
1447 | /* when a driver is successfully registered, it will receive | |
1448 | * control requests including set_configuration(), which enables | |
1449 | * non-control requests. then usb traffic follows until a | |
1450 | * disconnect is reported. then a host may connect again, or | |
1451 | * the driver might get unbound. | |
1452 | */ | |
96f8db6a FB |
1453 | static int net2272_start(struct usb_gadget *_gadget, |
1454 | struct usb_gadget_driver *driver) | |
ceb80363 | 1455 | { |
96f8db6a | 1456 | struct net2272 *dev; |
ceb80363 SL |
1457 | unsigned i; |
1458 | ||
a6c7c1c4 | 1459 | if (!driver || !driver->setup || |
7177aed4 | 1460 | driver->max_speed != USB_SPEED_HIGH) |
ceb80363 | 1461 | return -EINVAL; |
96f8db6a FB |
1462 | |
1463 | dev = container_of(_gadget, struct net2272, gadget); | |
ceb80363 SL |
1464 | |
1465 | for (i = 0; i < 4; ++i) | |
1466 | dev->ep[i].irqs = 0; | |
1467 | /* hook up the driver ... */ | |
1468 | dev->softconnect = 1; | |
1469 | driver->driver.bus = NULL; | |
1470 | dev->driver = driver; | |
ceb80363 SL |
1471 | |
1472 | /* ... then enable host detection and ep0; and we're ready | |
1473 | * for set_configuration as well as eventual disconnect. | |
1474 | */ | |
1475 | net2272_ep0_start(dev); | |
1476 | ||
ceb80363 SL |
1477 | return 0; |
1478 | } | |
ceb80363 SL |
1479 | |
1480 | static void | |
1481 | stop_activity(struct net2272 *dev, struct usb_gadget_driver *driver) | |
1482 | { | |
1483 | int i; | |
1484 | ||
1485 | /* don't disconnect if it's not connected */ | |
1486 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1487 | driver = NULL; | |
1488 | ||
1489 | /* stop hardware; prevent new request submissions; | |
1490 | * and kill any outstanding requests. | |
1491 | */ | |
1492 | net2272_usb_reset(dev); | |
1493 | for (i = 0; i < 4; ++i) | |
1494 | net2272_dequeue_all(&dev->ep[i]); | |
1495 | ||
699412d9 FB |
1496 | /* report disconnect; the driver is already quiesced */ |
1497 | if (driver) { | |
1498 | spin_unlock(&dev->lock); | |
1499 | driver->disconnect(&dev->gadget); | |
1500 | spin_lock(&dev->lock); | |
1501 | } | |
1502 | ||
ceb80363 SL |
1503 | net2272_usb_reinit(dev); |
1504 | } | |
1505 | ||
22835b80 | 1506 | static int net2272_stop(struct usb_gadget *_gadget) |
ceb80363 | 1507 | { |
96f8db6a | 1508 | struct net2272 *dev; |
ceb80363 SL |
1509 | unsigned long flags; |
1510 | ||
96f8db6a | 1511 | dev = container_of(_gadget, struct net2272, gadget); |
ceb80363 SL |
1512 | |
1513 | spin_lock_irqsave(&dev->lock, flags); | |
5baca5cf | 1514 | stop_activity(dev, NULL); |
ceb80363 SL |
1515 | spin_unlock_irqrestore(&dev->lock, flags); |
1516 | ||
ceb80363 SL |
1517 | dev->driver = NULL; |
1518 | ||
ceb80363 SL |
1519 | return 0; |
1520 | } | |
ceb80363 SL |
1521 | |
1522 | /*---------------------------------------------------------------------------*/ | |
1523 | /* handle ep-a/ep-b dma completions */ | |
1524 | static void | |
1525 | net2272_handle_dma(struct net2272_ep *ep) | |
1526 | { | |
1527 | struct net2272_request *req; | |
1528 | unsigned len; | |
1529 | int status; | |
1530 | ||
1531 | if (!list_empty(&ep->queue)) | |
1532 | req = list_entry(ep->queue.next, | |
1533 | struct net2272_request, queue); | |
1534 | else | |
1535 | req = NULL; | |
1536 | ||
1537 | dev_vdbg(ep->dev->dev, "handle_dma %s req %p\n", ep->ep.name, req); | |
1538 | ||
1539 | /* Ensure DREQ is de-asserted */ | |
1540 | net2272_write(ep->dev, DMAREQ, | |
1541 | (0 << DMA_BUFFER_VALID) | |
1542 | | (0 << DMA_REQUEST_ENABLE) | |
1543 | | (1 << DMA_CONTROL_DACK) | |
1544 | | (ep->dev->dma_eot_polarity << EOT_POLARITY) | |
1545 | | (ep->dev->dma_dack_polarity << DACK_POLARITY) | |
1546 | | (ep->dev->dma_dreq_polarity << DREQ_POLARITY) | |
69147121 | 1547 | | (ep->dma << DMA_ENDPOINT_SELECT)); |
ceb80363 SL |
1548 | |
1549 | ep->dev->dma_busy = 0; | |
1550 | ||
1551 | net2272_ep_write(ep, EP_IRQENB, | |
1552 | (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE) | |
1553 | | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE) | |
1554 | | net2272_ep_read(ep, EP_IRQENB)); | |
1555 | ||
1556 | /* device-to-host transfer completed */ | |
1557 | if (ep->is_in) { | |
1558 | /* validate a short packet or zlp if necessary */ | |
1559 | if ((req->req.length % ep->ep.maxpacket != 0) || | |
1560 | req->req.zero) | |
1561 | set_fifo_bytecount(ep, 0); | |
1562 | ||
1563 | net2272_done(ep, req, 0); | |
1564 | if (!list_empty(&ep->queue)) { | |
1565 | req = list_entry(ep->queue.next, | |
1566 | struct net2272_request, queue); | |
1567 | status = net2272_kick_dma(ep, req); | |
1568 | if (status < 0) | |
1569 | net2272_pio_advance(ep); | |
1570 | } | |
1571 | ||
1572 | /* host-to-device transfer completed */ | |
1573 | } else { | |
1574 | /* terminated with a short packet? */ | |
1575 | if (net2272_read(ep->dev, IRQSTAT0) & | |
1576 | (1 << DMA_DONE_INTERRUPT)) { | |
1577 | /* abort system dma */ | |
1578 | net2272_cancel_dma(ep->dev); | |
1579 | } | |
1580 | ||
1581 | /* EP_TRANSFER will contain the number of bytes | |
1582 | * actually received. | |
1583 | * NOTE: There is no overflow detection on EP_TRANSFER: | |
1584 | * We can't deal with transfers larger than 2^24 bytes! | |
1585 | */ | |
1586 | len = (net2272_ep_read(ep, EP_TRANSFER2) << 16) | |
1587 | | (net2272_ep_read(ep, EP_TRANSFER1) << 8) | |
1588 | | (net2272_ep_read(ep, EP_TRANSFER0)); | |
1589 | ||
1590 | if (ep->not_empty) | |
1591 | len += 4; | |
1592 | ||
1593 | req->req.actual += len; | |
1594 | ||
1595 | /* get any remaining data */ | |
1596 | net2272_pio_advance(ep); | |
1597 | } | |
1598 | } | |
1599 | ||
1600 | /*---------------------------------------------------------------------------*/ | |
1601 | ||
1602 | static void | |
1603 | net2272_handle_ep(struct net2272_ep *ep) | |
1604 | { | |
1605 | struct net2272_request *req; | |
1606 | u8 stat0, stat1; | |
1607 | ||
1608 | if (!list_empty(&ep->queue)) | |
1609 | req = list_entry(ep->queue.next, | |
1610 | struct net2272_request, queue); | |
1611 | else | |
1612 | req = NULL; | |
1613 | ||
1614 | /* ack all, and handle what we care about */ | |
1615 | stat0 = net2272_ep_read(ep, EP_STAT0); | |
1616 | stat1 = net2272_ep_read(ep, EP_STAT1); | |
1617 | ep->irqs++; | |
1618 | ||
1619 | dev_vdbg(ep->dev->dev, "%s ack ep_stat0 %02x, ep_stat1 %02x, req %p\n", | |
69147121 | 1620 | ep->ep.name, stat0, stat1, req ? &req->req : NULL); |
ceb80363 SL |
1621 | |
1622 | net2272_ep_write(ep, EP_STAT0, stat0 & | |
1623 | ~((1 << NAK_OUT_PACKETS) | |
1624 | | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT))); | |
1625 | net2272_ep_write(ep, EP_STAT1, stat1); | |
1626 | ||
1627 | /* data packet(s) received (in the fifo, OUT) | |
1628 | * direction must be validated, otherwise control read status phase | |
1629 | * could be interpreted as a valid packet | |
1630 | */ | |
1631 | if (!ep->is_in && (stat0 & (1 << DATA_PACKET_RECEIVED_INTERRUPT))) | |
1632 | net2272_pio_advance(ep); | |
1633 | /* data packet(s) transmitted (IN) */ | |
1634 | else if (stat0 & (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)) | |
1635 | net2272_pio_advance(ep); | |
1636 | } | |
1637 | ||
1638 | static struct net2272_ep * | |
1639 | net2272_get_ep_by_addr(struct net2272 *dev, u16 wIndex) | |
1640 | { | |
1641 | struct net2272_ep *ep; | |
1642 | ||
1643 | if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0) | |
1644 | return &dev->ep[0]; | |
1645 | ||
1646 | list_for_each_entry(ep, &dev->gadget.ep_list, ep.ep_list) { | |
1647 | u8 bEndpointAddress; | |
1648 | ||
1649 | if (!ep->desc) | |
1650 | continue; | |
1651 | bEndpointAddress = ep->desc->bEndpointAddress; | |
1652 | if ((wIndex ^ bEndpointAddress) & USB_DIR_IN) | |
1653 | continue; | |
1654 | if ((wIndex & 0x0f) == (bEndpointAddress & 0x0f)) | |
1655 | return ep; | |
1656 | } | |
1657 | return NULL; | |
1658 | } | |
1659 | ||
1660 | /* | |
1661 | * USB Test Packet: | |
1662 | * JKJKJKJK * 9 | |
1663 | * JJKKJJKK * 8 | |
1664 | * JJJJKKKK * 8 | |
1665 | * JJJJJJJKKKKKKK * 8 | |
1666 | * JJJJJJJK * 8 | |
1667 | * {JKKKKKKK * 10}, JK | |
1668 | */ | |
1669 | static const u8 net2272_test_packet[] = { | |
1670 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
1671 | 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, | |
1672 | 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, | |
1673 | 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, | |
1674 | 0x7F, 0xBF, 0xDF, 0xEF, 0xF7, 0xFB, 0xFD, | |
1675 | 0xFC, 0x7E, 0xBF, 0xDF, 0xEF, 0xF7, 0xFD, 0x7E | |
1676 | }; | |
1677 | ||
1678 | static void | |
1679 | net2272_set_test_mode(struct net2272 *dev, int mode) | |
1680 | { | |
1681 | int i; | |
1682 | ||
1683 | /* Disable all net2272 interrupts: | |
1684 | * Nothing but a power cycle should stop the test. | |
1685 | */ | |
1686 | net2272_write(dev, IRQENB0, 0x00); | |
1687 | net2272_write(dev, IRQENB1, 0x00); | |
1688 | ||
1689 | /* Force tranceiver to high-speed */ | |
1690 | net2272_write(dev, XCVRDIAG, 1 << FORCE_HIGH_SPEED); | |
1691 | ||
1692 | net2272_write(dev, PAGESEL, 0); | |
1693 | net2272_write(dev, EP_STAT0, 1 << DATA_PACKET_TRANSMITTED_INTERRUPT); | |
1694 | net2272_write(dev, EP_RSPCLR, | |
1695 | (1 << CONTROL_STATUS_PHASE_HANDSHAKE) | |
1696 | | (1 << HIDE_STATUS_PHASE)); | |
1697 | net2272_write(dev, EP_CFG, 1 << ENDPOINT_DIRECTION); | |
1698 | net2272_write(dev, EP_STAT1, 1 << BUFFER_FLUSH); | |
1699 | ||
1700 | /* wait for status phase to complete */ | |
1701 | while (!(net2272_read(dev, EP_STAT0) & | |
1702 | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT))) | |
1703 | ; | |
1704 | ||
1705 | /* Enable test mode */ | |
1706 | net2272_write(dev, USBTEST, mode); | |
1707 | ||
1708 | /* load test packet */ | |
1709 | if (mode == TEST_PACKET) { | |
1710 | /* switch to 8 bit mode */ | |
1711 | net2272_write(dev, LOCCTL, net2272_read(dev, LOCCTL) & | |
1712 | ~(1 << DATA_WIDTH)); | |
1713 | ||
1714 | for (i = 0; i < sizeof(net2272_test_packet); ++i) | |
1715 | net2272_write(dev, EP_DATA, net2272_test_packet[i]); | |
1716 | ||
1717 | /* Validate test packet */ | |
1718 | net2272_write(dev, EP_TRANSFER0, 0); | |
1719 | } | |
1720 | } | |
1721 | ||
1722 | static void | |
1723 | net2272_handle_stat0_irqs(struct net2272 *dev, u8 stat) | |
1724 | { | |
1725 | struct net2272_ep *ep; | |
1726 | u8 num, scratch; | |
1727 | ||
1728 | /* starting a control request? */ | |
1729 | if (unlikely(stat & (1 << SETUP_PACKET_INTERRUPT))) { | |
1730 | union { | |
1731 | u8 raw[8]; | |
1732 | struct usb_ctrlrequest r; | |
1733 | } u; | |
1734 | int tmp = 0; | |
1735 | struct net2272_request *req; | |
1736 | ||
1737 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) { | |
1738 | if (net2272_read(dev, USBCTL1) & (1 << USB_HIGH_SPEED)) | |
1739 | dev->gadget.speed = USB_SPEED_HIGH; | |
1740 | else | |
1741 | dev->gadget.speed = USB_SPEED_FULL; | |
e538dfda MN |
1742 | dev_dbg(dev->dev, "%s\n", |
1743 | usb_speed_string(dev->gadget.speed)); | |
ceb80363 SL |
1744 | } |
1745 | ||
1746 | ep = &dev->ep[0]; | |
1747 | ep->irqs++; | |
1748 | ||
1749 | /* make sure any leftover interrupt state is cleared */ | |
1750 | stat &= ~(1 << ENDPOINT_0_INTERRUPT); | |
1751 | while (!list_empty(&ep->queue)) { | |
1752 | req = list_entry(ep->queue.next, | |
1753 | struct net2272_request, queue); | |
1754 | net2272_done(ep, req, | |
1755 | (req->req.actual == req->req.length) ? 0 : -EPROTO); | |
1756 | } | |
1757 | ep->stopped = 0; | |
1758 | dev->protocol_stall = 0; | |
1759 | net2272_ep_write(ep, EP_STAT0, | |
1760 | (1 << DATA_IN_TOKEN_INTERRUPT) | |
1761 | | (1 << DATA_OUT_TOKEN_INTERRUPT) | |
1762 | | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT) | |
1763 | | (1 << DATA_PACKET_RECEIVED_INTERRUPT) | |
1764 | | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)); | |
1765 | net2272_ep_write(ep, EP_STAT1, | |
1766 | (1 << TIMEOUT) | |
1767 | | (1 << USB_OUT_ACK_SENT) | |
1768 | | (1 << USB_OUT_NAK_SENT) | |
1769 | | (1 << USB_IN_ACK_RCVD) | |
1770 | | (1 << USB_IN_NAK_SENT) | |
1771 | | (1 << USB_STALL_SENT) | |
1772 | | (1 << LOCAL_OUT_ZLP)); | |
1773 | ||
1774 | /* | |
1775 | * Ensure Control Read pre-validation setting is beyond maximum size | |
1776 | * - Control Writes can leave non-zero values in EP_TRANSFER. If | |
1777 | * an EP0 transfer following the Control Write is a Control Read, | |
1778 | * the NET2272 sees the non-zero EP_TRANSFER as an unexpected | |
1779 | * pre-validation count. | |
1780 | * - Setting EP_TRANSFER beyond the maximum EP0 transfer size ensures | |
1781 | * the pre-validation count cannot cause an unexpected validatation | |
1782 | */ | |
1783 | net2272_write(dev, PAGESEL, 0); | |
1784 | net2272_write(dev, EP_TRANSFER2, 0xff); | |
1785 | net2272_write(dev, EP_TRANSFER1, 0xff); | |
1786 | net2272_write(dev, EP_TRANSFER0, 0xff); | |
1787 | ||
1788 | u.raw[0] = net2272_read(dev, SETUP0); | |
1789 | u.raw[1] = net2272_read(dev, SETUP1); | |
1790 | u.raw[2] = net2272_read(dev, SETUP2); | |
1791 | u.raw[3] = net2272_read(dev, SETUP3); | |
1792 | u.raw[4] = net2272_read(dev, SETUP4); | |
1793 | u.raw[5] = net2272_read(dev, SETUP5); | |
1794 | u.raw[6] = net2272_read(dev, SETUP6); | |
1795 | u.raw[7] = net2272_read(dev, SETUP7); | |
1796 | /* | |
1797 | * If you have a big endian cpu make sure le16_to_cpus | |
1798 | * performs the proper byte swapping here... | |
1799 | */ | |
1800 | le16_to_cpus(&u.r.wValue); | |
1801 | le16_to_cpus(&u.r.wIndex); | |
1802 | le16_to_cpus(&u.r.wLength); | |
1803 | ||
1804 | /* ack the irq */ | |
1805 | net2272_write(dev, IRQSTAT0, 1 << SETUP_PACKET_INTERRUPT); | |
1806 | stat ^= (1 << SETUP_PACKET_INTERRUPT); | |
1807 | ||
1808 | /* watch control traffic at the token level, and force | |
1809 | * synchronization before letting the status phase happen. | |
1810 | */ | |
1811 | ep->is_in = (u.r.bRequestType & USB_DIR_IN) != 0; | |
1812 | if (ep->is_in) { | |
1813 | scratch = (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE) | |
1814 | | (1 << DATA_OUT_TOKEN_INTERRUPT_ENABLE) | |
1815 | | (1 << DATA_IN_TOKEN_INTERRUPT_ENABLE); | |
1816 | stop_out_naking(ep); | |
1817 | } else | |
1818 | scratch = (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE) | |
1819 | | (1 << DATA_OUT_TOKEN_INTERRUPT_ENABLE) | |
1820 | | (1 << DATA_IN_TOKEN_INTERRUPT_ENABLE); | |
1821 | net2272_ep_write(ep, EP_IRQENB, scratch); | |
1822 | ||
1823 | if ((u.r.bRequestType & USB_TYPE_MASK) != USB_TYPE_STANDARD) | |
1824 | goto delegate; | |
1825 | switch (u.r.bRequest) { | |
1826 | case USB_REQ_GET_STATUS: { | |
1827 | struct net2272_ep *e; | |
1828 | u16 status = 0; | |
1829 | ||
1830 | switch (u.r.bRequestType & USB_RECIP_MASK) { | |
1831 | case USB_RECIP_ENDPOINT: | |
1832 | e = net2272_get_ep_by_addr(dev, u.r.wIndex); | |
1833 | if (!e || u.r.wLength > 2) | |
1834 | goto do_stall; | |
1835 | if (net2272_ep_read(e, EP_RSPSET) & (1 << ENDPOINT_HALT)) | |
b5c03bff | 1836 | status = cpu_to_le16(1); |
ceb80363 | 1837 | else |
b5c03bff | 1838 | status = cpu_to_le16(0); |
ceb80363 SL |
1839 | |
1840 | /* don't bother with a request object! */ | |
1841 | net2272_ep_write(&dev->ep[0], EP_IRQENB, 0); | |
1842 | writew(status, net2272_reg_addr(dev, EP_DATA)); | |
1843 | set_fifo_bytecount(&dev->ep[0], 0); | |
1844 | allow_status(ep); | |
1845 | dev_vdbg(dev->dev, "%s stat %02x\n", | |
1846 | ep->ep.name, status); | |
1847 | goto next_endpoints; | |
1848 | case USB_RECIP_DEVICE: | |
1849 | if (u.r.wLength > 2) | |
1850 | goto do_stall; | |
d4a1c479 | 1851 | if (dev->gadget.is_selfpowered) |
ceb80363 SL |
1852 | status = (1 << USB_DEVICE_SELF_POWERED); |
1853 | ||
1854 | /* don't bother with a request object! */ | |
1855 | net2272_ep_write(&dev->ep[0], EP_IRQENB, 0); | |
1856 | writew(status, net2272_reg_addr(dev, EP_DATA)); | |
1857 | set_fifo_bytecount(&dev->ep[0], 0); | |
1858 | allow_status(ep); | |
1859 | dev_vdbg(dev->dev, "device stat %02x\n", status); | |
1860 | goto next_endpoints; | |
1861 | case USB_RECIP_INTERFACE: | |
1862 | if (u.r.wLength > 2) | |
1863 | goto do_stall; | |
1864 | ||
1865 | /* don't bother with a request object! */ | |
1866 | net2272_ep_write(&dev->ep[0], EP_IRQENB, 0); | |
1867 | writew(status, net2272_reg_addr(dev, EP_DATA)); | |
1868 | set_fifo_bytecount(&dev->ep[0], 0); | |
1869 | allow_status(ep); | |
1870 | dev_vdbg(dev->dev, "interface status %02x\n", status); | |
1871 | goto next_endpoints; | |
1872 | } | |
1873 | ||
1874 | break; | |
1875 | } | |
1876 | case USB_REQ_CLEAR_FEATURE: { | |
1877 | struct net2272_ep *e; | |
1878 | ||
1879 | if (u.r.bRequestType != USB_RECIP_ENDPOINT) | |
1880 | goto delegate; | |
1881 | if (u.r.wValue != USB_ENDPOINT_HALT || | |
1882 | u.r.wLength != 0) | |
1883 | goto do_stall; | |
1884 | e = net2272_get_ep_by_addr(dev, u.r.wIndex); | |
1885 | if (!e) | |
1886 | goto do_stall; | |
1887 | if (e->wedged) { | |
1888 | dev_vdbg(dev->dev, "%s wedged, halt not cleared\n", | |
1889 | ep->ep.name); | |
1890 | } else { | |
1891 | dev_vdbg(dev->dev, "%s clear halt\n", ep->ep.name); | |
1892 | clear_halt(e); | |
1893 | } | |
1894 | allow_status(ep); | |
1895 | goto next_endpoints; | |
1896 | } | |
1897 | case USB_REQ_SET_FEATURE: { | |
1898 | struct net2272_ep *e; | |
1899 | ||
1900 | if (u.r.bRequestType == USB_RECIP_DEVICE) { | |
1901 | if (u.r.wIndex != NORMAL_OPERATION) | |
1902 | net2272_set_test_mode(dev, (u.r.wIndex >> 8)); | |
1903 | allow_status(ep); | |
1904 | dev_vdbg(dev->dev, "test mode: %d\n", u.r.wIndex); | |
1905 | goto next_endpoints; | |
1906 | } else if (u.r.bRequestType != USB_RECIP_ENDPOINT) | |
1907 | goto delegate; | |
1908 | if (u.r.wValue != USB_ENDPOINT_HALT || | |
1909 | u.r.wLength != 0) | |
1910 | goto do_stall; | |
1911 | e = net2272_get_ep_by_addr(dev, u.r.wIndex); | |
1912 | if (!e) | |
1913 | goto do_stall; | |
1914 | set_halt(e); | |
1915 | allow_status(ep); | |
1916 | dev_vdbg(dev->dev, "%s set halt\n", ep->ep.name); | |
1917 | goto next_endpoints; | |
1918 | } | |
1919 | case USB_REQ_SET_ADDRESS: { | |
1920 | net2272_write(dev, OURADDR, u.r.wValue & 0xff); | |
1921 | allow_status(ep); | |
1922 | break; | |
1923 | } | |
1924 | default: | |
1925 | delegate: | |
1926 | dev_vdbg(dev->dev, "setup %02x.%02x v%04x i%04x " | |
1927 | "ep_cfg %08x\n", | |
1928 | u.r.bRequestType, u.r.bRequest, | |
1929 | u.r.wValue, u.r.wIndex, | |
1930 | net2272_ep_read(ep, EP_CFG)); | |
1931 | spin_unlock(&dev->lock); | |
1932 | tmp = dev->driver->setup(&dev->gadget, &u.r); | |
1933 | spin_lock(&dev->lock); | |
1934 | } | |
1935 | ||
1936 | /* stall ep0 on error */ | |
1937 | if (tmp < 0) { | |
1938 | do_stall: | |
1939 | dev_vdbg(dev->dev, "req %02x.%02x protocol STALL; stat %d\n", | |
1940 | u.r.bRequestType, u.r.bRequest, tmp); | |
1941 | dev->protocol_stall = 1; | |
1942 | } | |
1943 | /* endpoint dma irq? */ | |
1944 | } else if (stat & (1 << DMA_DONE_INTERRUPT)) { | |
1945 | net2272_cancel_dma(dev); | |
1946 | net2272_write(dev, IRQSTAT0, 1 << DMA_DONE_INTERRUPT); | |
1947 | stat &= ~(1 << DMA_DONE_INTERRUPT); | |
1948 | num = (net2272_read(dev, DMAREQ) & (1 << DMA_ENDPOINT_SELECT)) | |
1949 | ? 2 : 1; | |
1950 | ||
1951 | ep = &dev->ep[num]; | |
1952 | net2272_handle_dma(ep); | |
1953 | } | |
1954 | ||
1955 | next_endpoints: | |
1956 | /* endpoint data irq? */ | |
1957 | scratch = stat & 0x0f; | |
1958 | stat &= ~0x0f; | |
1959 | for (num = 0; scratch; num++) { | |
1960 | u8 t; | |
1961 | ||
1962 | /* does this endpoint's FIFO and queue need tending? */ | |
1963 | t = 1 << num; | |
1964 | if ((scratch & t) == 0) | |
1965 | continue; | |
1966 | scratch ^= t; | |
1967 | ||
1968 | ep = &dev->ep[num]; | |
1969 | net2272_handle_ep(ep); | |
1970 | } | |
1971 | ||
1972 | /* some interrupts we can just ignore */ | |
1973 | stat &= ~(1 << SOF_INTERRUPT); | |
1974 | ||
1975 | if (stat) | |
1976 | dev_dbg(dev->dev, "unhandled irqstat0 %02x\n", stat); | |
1977 | } | |
1978 | ||
1979 | static void | |
1980 | net2272_handle_stat1_irqs(struct net2272 *dev, u8 stat) | |
1981 | { | |
1982 | u8 tmp, mask; | |
1983 | ||
1984 | /* after disconnect there's nothing else to do! */ | |
1985 | tmp = (1 << VBUS_INTERRUPT) | (1 << ROOT_PORT_RESET_INTERRUPT); | |
1986 | mask = (1 << USB_HIGH_SPEED) | (1 << USB_FULL_SPEED); | |
1987 | ||
1988 | if (stat & tmp) { | |
5ca1ccda AS |
1989 | bool reset = false; |
1990 | bool disconnect = false; | |
1991 | ||
1992 | /* | |
1993 | * Ignore disconnects and resets if the speed hasn't been set. | |
1994 | * VBUS can bounce and there's always an initial reset. | |
1995 | */ | |
ceb80363 | 1996 | net2272_write(dev, IRQSTAT1, tmp); |
5ca1ccda AS |
1997 | if (dev->gadget.speed != USB_SPEED_UNKNOWN) { |
1998 | if ((stat & (1 << VBUS_INTERRUPT)) && | |
1999 | (net2272_read(dev, USBCTL1) & | |
2000 | (1 << VBUS_PIN)) == 0) { | |
2001 | disconnect = true; | |
2002 | dev_dbg(dev->dev, "disconnect %s\n", | |
2003 | dev->driver->driver.name); | |
2004 | } else if ((stat & (1 << ROOT_PORT_RESET_INTERRUPT)) && | |
2005 | (net2272_read(dev, USBCTL1) & mask) | |
2006 | == 0) { | |
2007 | reset = true; | |
2008 | dev_dbg(dev->dev, "reset %s\n", | |
2009 | dev->driver->driver.name); | |
2010 | } | |
2011 | ||
2012 | if (disconnect || reset) { | |
2013 | stop_activity(dev, dev->driver); | |
2014 | net2272_ep0_start(dev); | |
2015 | spin_unlock(&dev->lock); | |
2016 | if (reset) | |
2017 | usb_gadget_udc_reset | |
2018 | (&dev->gadget, dev->driver); | |
2019 | else | |
2020 | (dev->driver->disconnect) | |
2021 | (&dev->gadget); | |
2022 | spin_lock(&dev->lock); | |
2023 | return; | |
2024 | } | |
ceb80363 SL |
2025 | } |
2026 | stat &= ~tmp; | |
2027 | ||
2028 | if (!stat) | |
2029 | return; | |
2030 | } | |
2031 | ||
2032 | tmp = (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT); | |
2033 | if (stat & tmp) { | |
2034 | net2272_write(dev, IRQSTAT1, tmp); | |
2035 | if (stat & (1 << SUSPEND_REQUEST_INTERRUPT)) { | |
2036 | if (dev->driver->suspend) | |
2037 | dev->driver->suspend(&dev->gadget); | |
2038 | if (!enable_suspend) { | |
2039 | stat &= ~(1 << SUSPEND_REQUEST_INTERRUPT); | |
2040 | dev_dbg(dev->dev, "Suspend disabled, ignoring\n"); | |
2041 | } | |
2042 | } else { | |
2043 | if (dev->driver->resume) | |
2044 | dev->driver->resume(&dev->gadget); | |
2045 | } | |
2046 | stat &= ~tmp; | |
2047 | } | |
2048 | ||
2049 | /* clear any other status/irqs */ | |
2050 | if (stat) | |
2051 | net2272_write(dev, IRQSTAT1, stat); | |
2052 | ||
2053 | /* some status we can just ignore */ | |
2054 | stat &= ~((1 << CONTROL_STATUS_INTERRUPT) | |
2055 | | (1 << SUSPEND_REQUEST_INTERRUPT) | |
2056 | | (1 << RESUME_INTERRUPT)); | |
2057 | if (!stat) | |
2058 | return; | |
2059 | else | |
2060 | dev_dbg(dev->dev, "unhandled irqstat1 %02x\n", stat); | |
2061 | } | |
2062 | ||
2063 | static irqreturn_t net2272_irq(int irq, void *_dev) | |
2064 | { | |
2065 | struct net2272 *dev = _dev; | |
2066 | #if defined(PLX_PCI_RDK) || defined(PLX_PCI_RDK2) | |
2067 | u32 intcsr; | |
2068 | #endif | |
2069 | #if defined(PLX_PCI_RDK) | |
2070 | u8 dmareq; | |
2071 | #endif | |
2072 | spin_lock(&dev->lock); | |
2073 | #if defined(PLX_PCI_RDK) | |
2074 | intcsr = readl(dev->rdk1.plx9054_base_addr + INTCSR); | |
2075 | ||
2076 | if ((intcsr & LOCAL_INTERRUPT_TEST) == LOCAL_INTERRUPT_TEST) { | |
2077 | writel(intcsr & ~(1 << PCI_INTERRUPT_ENABLE), | |
2078 | dev->rdk1.plx9054_base_addr + INTCSR); | |
2079 | net2272_handle_stat1_irqs(dev, net2272_read(dev, IRQSTAT1)); | |
2080 | net2272_handle_stat0_irqs(dev, net2272_read(dev, IRQSTAT0)); | |
2081 | intcsr = readl(dev->rdk1.plx9054_base_addr + INTCSR); | |
2082 | writel(intcsr | (1 << PCI_INTERRUPT_ENABLE), | |
2083 | dev->rdk1.plx9054_base_addr + INTCSR); | |
2084 | } | |
2085 | if ((intcsr & DMA_CHANNEL_0_TEST) == DMA_CHANNEL_0_TEST) { | |
2086 | writeb((1 << CHANNEL_CLEAR_INTERRUPT | (0 << CHANNEL_ENABLE)), | |
2087 | dev->rdk1.plx9054_base_addr + DMACSR0); | |
2088 | ||
2089 | dmareq = net2272_read(dev, DMAREQ); | |
2090 | if (dmareq & 0x01) | |
2091 | net2272_handle_dma(&dev->ep[2]); | |
2092 | else | |
2093 | net2272_handle_dma(&dev->ep[1]); | |
2094 | } | |
2095 | #endif | |
2096 | #if defined(PLX_PCI_RDK2) | |
2097 | /* see if PCI int for us by checking irqstat */ | |
2098 | intcsr = readl(dev->rdk2.fpga_base_addr + RDK2_IRQSTAT); | |
000b7f51 WY |
2099 | if (!intcsr & (1 << NET2272_PCI_IRQ)) { |
2100 | spin_unlock(&dev->lock); | |
ceb80363 | 2101 | return IRQ_NONE; |
000b7f51 | 2102 | } |
ceb80363 SL |
2103 | /* check dma interrupts */ |
2104 | #endif | |
2105 | /* Platform/devcice interrupt handler */ | |
2106 | #if !defined(PLX_PCI_RDK) | |
2107 | net2272_handle_stat1_irqs(dev, net2272_read(dev, IRQSTAT1)); | |
2108 | net2272_handle_stat0_irqs(dev, net2272_read(dev, IRQSTAT0)); | |
2109 | #endif | |
2110 | spin_unlock(&dev->lock); | |
2111 | ||
2112 | return IRQ_HANDLED; | |
2113 | } | |
2114 | ||
2115 | static int net2272_present(struct net2272 *dev) | |
2116 | { | |
2117 | /* | |
2118 | * Quick test to see if CPU can communicate properly with the NET2272. | |
2119 | * Verifies connection using writes and reads to write/read and | |
2120 | * read-only registers. | |
2121 | * | |
2122 | * This routine is strongly recommended especially during early bring-up | |
2123 | * of new hardware, however for designs that do not apply Power On System | |
2124 | * Tests (POST) it may discarded (or perhaps minimized). | |
2125 | */ | |
2126 | unsigned int ii; | |
2127 | u8 val, refval; | |
2128 | ||
2129 | /* Verify NET2272 write/read SCRATCH register can write and read */ | |
2130 | refval = net2272_read(dev, SCRATCH); | |
2131 | for (ii = 0; ii < 0x100; ii += 7) { | |
2132 | net2272_write(dev, SCRATCH, ii); | |
2133 | val = net2272_read(dev, SCRATCH); | |
2134 | if (val != ii) { | |
2135 | dev_dbg(dev->dev, | |
2136 | "%s: write/read SCRATCH register test failed: " | |
2137 | "wrote:0x%2.2x, read:0x%2.2x\n", | |
2138 | __func__, ii, val); | |
2139 | return -EINVAL; | |
2140 | } | |
2141 | } | |
2142 | /* To be nice, we write the original SCRATCH value back: */ | |
2143 | net2272_write(dev, SCRATCH, refval); | |
2144 | ||
2145 | /* Verify NET2272 CHIPREV register is read-only: */ | |
2146 | refval = net2272_read(dev, CHIPREV_2272); | |
2147 | for (ii = 0; ii < 0x100; ii += 7) { | |
2148 | net2272_write(dev, CHIPREV_2272, ii); | |
2149 | val = net2272_read(dev, CHIPREV_2272); | |
2150 | if (val != refval) { | |
2151 | dev_dbg(dev->dev, | |
2152 | "%s: write/read CHIPREV register test failed: " | |
2153 | "wrote 0x%2.2x, read:0x%2.2x expected:0x%2.2x\n", | |
2154 | __func__, ii, val, refval); | |
2155 | return -EINVAL; | |
2156 | } | |
2157 | } | |
2158 | ||
2159 | /* | |
2160 | * Verify NET2272's "NET2270 legacy revision" register | |
2161 | * - NET2272 has two revision registers. The NET2270 legacy revision | |
2162 | * register should read the same value, regardless of the NET2272 | |
2163 | * silicon revision. The legacy register applies to NET2270 | |
2164 | * firmware being applied to the NET2272. | |
2165 | */ | |
2166 | val = net2272_read(dev, CHIPREV_LEGACY); | |
2167 | if (val != NET2270_LEGACY_REV) { | |
2168 | /* | |
2169 | * Unexpected legacy revision value | |
2170 | * - Perhaps the chip is a NET2270? | |
2171 | */ | |
2172 | dev_dbg(dev->dev, | |
2173 | "%s: WARNING: UNEXPECTED NET2272 LEGACY REGISTER VALUE:\n" | |
2174 | " - CHIPREV_LEGACY: expected 0x%2.2x, got:0x%2.2x. (Not NET2272?)\n", | |
2175 | __func__, NET2270_LEGACY_REV, val); | |
2176 | return -EINVAL; | |
2177 | } | |
2178 | ||
2179 | /* | |
2180 | * Verify NET2272 silicon revision | |
2181 | * - This revision register is appropriate for the silicon version | |
2182 | * of the NET2272 | |
2183 | */ | |
2184 | val = net2272_read(dev, CHIPREV_2272); | |
2185 | switch (val) { | |
2186 | case CHIPREV_NET2272_R1: | |
2187 | /* | |
2188 | * NET2272 Rev 1 has DMA related errata: | |
2189 | * - Newer silicon (Rev 1A or better) required | |
2190 | */ | |
2191 | dev_dbg(dev->dev, | |
2192 | "%s: Rev 1 detected: newer silicon recommended for DMA support\n", | |
2193 | __func__); | |
2194 | break; | |
2195 | case CHIPREV_NET2272_R1A: | |
2196 | break; | |
2197 | default: | |
2198 | /* NET2272 silicon version *may* not work with this firmware */ | |
2199 | dev_dbg(dev->dev, | |
2200 | "%s: unexpected silicon revision register value: " | |
2201 | " CHIPREV_2272: 0x%2.2x\n", | |
2202 | __func__, val); | |
2203 | /* | |
2204 | * Return Success, even though the chip rev is not an expected value | |
2205 | * - Older, pre-built firmware can attempt to operate on newer silicon | |
2206 | * - Often, new silicon is perfectly compatible | |
2207 | */ | |
2208 | } | |
2209 | ||
2210 | /* Success: NET2272 checks out OK */ | |
2211 | return 0; | |
2212 | } | |
2213 | ||
2214 | static void | |
2215 | net2272_gadget_release(struct device *_dev) | |
2216 | { | |
2217 | struct net2272 *dev = dev_get_drvdata(_dev); | |
2218 | kfree(dev); | |
2219 | } | |
2220 | ||
2221 | /*---------------------------------------------------------------------------*/ | |
2222 | ||
fb4e98ab | 2223 | static void |
ceb80363 SL |
2224 | net2272_remove(struct net2272 *dev) |
2225 | { | |
0f91349b | 2226 | usb_del_gadget_udc(&dev->gadget); |
ceb80363 SL |
2227 | free_irq(dev->irq, dev); |
2228 | iounmap(dev->base_addr); | |
ceb80363 SL |
2229 | device_remove_file(dev->dev, &dev_attr_registers); |
2230 | ||
2231 | dev_info(dev->dev, "unbind\n"); | |
ceb80363 SL |
2232 | } |
2233 | ||
41ac7b3a | 2234 | static struct net2272 *net2272_probe_init(struct device *dev, unsigned int irq) |
ceb80363 SL |
2235 | { |
2236 | struct net2272 *ret; | |
2237 | ||
ceb80363 SL |
2238 | if (!irq) { |
2239 | dev_dbg(dev, "No IRQ!\n"); | |
2240 | return ERR_PTR(-ENODEV); | |
2241 | } | |
2242 | ||
2243 | /* alloc, and start init */ | |
2244 | ret = kzalloc(sizeof(*ret), GFP_KERNEL); | |
2245 | if (!ret) | |
2246 | return ERR_PTR(-ENOMEM); | |
2247 | ||
2248 | spin_lock_init(&ret->lock); | |
2249 | ret->irq = irq; | |
2250 | ret->dev = dev; | |
2251 | ret->gadget.ops = &net2272_ops; | |
d327ab5b | 2252 | ret->gadget.max_speed = USB_SPEED_HIGH; |
ceb80363 SL |
2253 | |
2254 | /* the "gadget" abstracts/virtualizes the controller */ | |
ceb80363 SL |
2255 | ret->gadget.name = driver_name; |
2256 | ||
2257 | return ret; | |
2258 | } | |
2259 | ||
41ac7b3a | 2260 | static int |
ceb80363 SL |
2261 | net2272_probe_fin(struct net2272 *dev, unsigned int irqflags) |
2262 | { | |
2263 | int ret; | |
2264 | ||
2265 | /* See if there... */ | |
2266 | if (net2272_present(dev)) { | |
2267 | dev_warn(dev->dev, "2272 not found!\n"); | |
2268 | ret = -ENODEV; | |
2269 | goto err; | |
2270 | } | |
2271 | ||
2272 | net2272_usb_reset(dev); | |
2273 | net2272_usb_reinit(dev); | |
2274 | ||
2275 | ret = request_irq(dev->irq, net2272_irq, irqflags, driver_name, dev); | |
2276 | if (ret) { | |
2277 | dev_err(dev->dev, "request interrupt %i failed\n", dev->irq); | |
2278 | goto err; | |
2279 | } | |
2280 | ||
2281 | dev->chiprev = net2272_read(dev, CHIPREV_2272); | |
2282 | ||
2283 | /* done */ | |
2284 | dev_info(dev->dev, "%s\n", driver_desc); | |
2285 | dev_info(dev->dev, "irq %i, mem %p, chip rev %04x, dma %s\n", | |
2286 | dev->irq, dev->base_addr, dev->chiprev, | |
2287 | dma_mode_string()); | |
2288 | dev_info(dev->dev, "version: %s\n", driver_vers); | |
2289 | ||
ceb80363 SL |
2290 | ret = device_create_file(dev->dev, &dev_attr_registers); |
2291 | if (ret) | |
c9f9c849 | 2292 | goto err_irq; |
ceb80363 | 2293 | |
8efeeef6 FB |
2294 | ret = usb_add_gadget_udc_release(dev->dev, &dev->gadget, |
2295 | net2272_gadget_release); | |
0f91349b SAS |
2296 | if (ret) |
2297 | goto err_add_udc; | |
2298 | ||
ceb80363 SL |
2299 | return 0; |
2300 | ||
0f91349b SAS |
2301 | err_add_udc: |
2302 | device_remove_file(dev->dev, &dev_attr_registers); | |
ceb80363 SL |
2303 | err_irq: |
2304 | free_irq(dev->irq, dev); | |
2305 | err: | |
2306 | return ret; | |
2307 | } | |
2308 | ||
2309 | #ifdef CONFIG_PCI | |
2310 | ||
2311 | /* | |
2312 | * wrap this driver around the specified device, but | |
2313 | * don't respond over USB until a gadget driver binds to us | |
2314 | */ | |
2315 | ||
41ac7b3a | 2316 | static int |
ceb80363 SL |
2317 | net2272_rdk1_probe(struct pci_dev *pdev, struct net2272 *dev) |
2318 | { | |
2319 | unsigned long resource, len, tmp; | |
2320 | void __iomem *mem_mapped_addr[4]; | |
2321 | int ret, i; | |
2322 | ||
2323 | /* | |
2324 | * BAR 0 holds PLX 9054 config registers | |
2325 | * BAR 1 is i/o memory; unused here | |
2326 | * BAR 2 holds EPLD config registers | |
2327 | * BAR 3 holds NET2272 registers | |
2328 | */ | |
2329 | ||
2330 | /* Find and map all address spaces */ | |
2331 | for (i = 0; i < 4; ++i) { | |
2332 | if (i == 1) | |
2333 | continue; /* BAR1 unused */ | |
2334 | ||
2335 | resource = pci_resource_start(pdev, i); | |
2336 | len = pci_resource_len(pdev, i); | |
2337 | ||
2338 | if (!request_mem_region(resource, len, driver_name)) { | |
2339 | dev_dbg(dev->dev, "controller already in use\n"); | |
2340 | ret = -EBUSY; | |
2341 | goto err; | |
2342 | } | |
2343 | ||
2344 | mem_mapped_addr[i] = ioremap_nocache(resource, len); | |
2345 | if (mem_mapped_addr[i] == NULL) { | |
2346 | release_mem_region(resource, len); | |
2347 | dev_dbg(dev->dev, "can't map memory\n"); | |
2348 | ret = -EFAULT; | |
2349 | goto err; | |
2350 | } | |
2351 | } | |
2352 | ||
2353 | dev->rdk1.plx9054_base_addr = mem_mapped_addr[0]; | |
2354 | dev->rdk1.epld_base_addr = mem_mapped_addr[2]; | |
2355 | dev->base_addr = mem_mapped_addr[3]; | |
2356 | ||
2357 | /* Set PLX 9054 bus width (16 bits) */ | |
2358 | tmp = readl(dev->rdk1.plx9054_base_addr + LBRD1); | |
2359 | writel((tmp & ~(3 << MEMORY_SPACE_LOCAL_BUS_WIDTH)) | W16_BIT, | |
2360 | dev->rdk1.plx9054_base_addr + LBRD1); | |
2361 | ||
2362 | /* Enable PLX 9054 Interrupts */ | |
2363 | writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) | | |
2364 | (1 << PCI_INTERRUPT_ENABLE) | | |
2365 | (1 << LOCAL_INTERRUPT_INPUT_ENABLE), | |
2366 | dev->rdk1.plx9054_base_addr + INTCSR); | |
2367 | ||
2368 | writeb((1 << CHANNEL_CLEAR_INTERRUPT | (0 << CHANNEL_ENABLE)), | |
2369 | dev->rdk1.plx9054_base_addr + DMACSR0); | |
2370 | ||
2371 | /* reset */ | |
2372 | writeb((1 << EPLD_DMA_ENABLE) | | |
2373 | (1 << DMA_CTL_DACK) | | |
2374 | (1 << DMA_TIMEOUT_ENABLE) | | |
2375 | (1 << USER) | | |
2376 | (0 << MPX_MODE) | | |
2377 | (1 << BUSWIDTH) | | |
2378 | (1 << NET2272_RESET), | |
2379 | dev->base_addr + EPLD_IO_CONTROL_REGISTER); | |
2380 | ||
2381 | mb(); | |
2382 | writeb(readb(dev->base_addr + EPLD_IO_CONTROL_REGISTER) & | |
2383 | ~(1 << NET2272_RESET), | |
2384 | dev->base_addr + EPLD_IO_CONTROL_REGISTER); | |
2385 | udelay(200); | |
2386 | ||
2387 | return 0; | |
2388 | ||
2389 | err: | |
2390 | while (--i >= 0) { | |
2391 | iounmap(mem_mapped_addr[i]); | |
2392 | release_mem_region(pci_resource_start(pdev, i), | |
2393 | pci_resource_len(pdev, i)); | |
2394 | } | |
2395 | ||
2396 | return ret; | |
2397 | } | |
2398 | ||
41ac7b3a | 2399 | static int |
ceb80363 SL |
2400 | net2272_rdk2_probe(struct pci_dev *pdev, struct net2272 *dev) |
2401 | { | |
2402 | unsigned long resource, len; | |
2403 | void __iomem *mem_mapped_addr[2]; | |
2404 | int ret, i; | |
2405 | ||
2406 | /* | |
2407 | * BAR 0 holds FGPA config registers | |
2408 | * BAR 1 holds NET2272 registers | |
2409 | */ | |
2410 | ||
2411 | /* Find and map all address spaces, bar2-3 unused in rdk 2 */ | |
2412 | for (i = 0; i < 2; ++i) { | |
2413 | resource = pci_resource_start(pdev, i); | |
2414 | len = pci_resource_len(pdev, i); | |
2415 | ||
2416 | if (!request_mem_region(resource, len, driver_name)) { | |
2417 | dev_dbg(dev->dev, "controller already in use\n"); | |
2418 | ret = -EBUSY; | |
2419 | goto err; | |
2420 | } | |
2421 | ||
2422 | mem_mapped_addr[i] = ioremap_nocache(resource, len); | |
2423 | if (mem_mapped_addr[i] == NULL) { | |
2424 | release_mem_region(resource, len); | |
2425 | dev_dbg(dev->dev, "can't map memory\n"); | |
2426 | ret = -EFAULT; | |
2427 | goto err; | |
2428 | } | |
2429 | } | |
2430 | ||
2431 | dev->rdk2.fpga_base_addr = mem_mapped_addr[0]; | |
2432 | dev->base_addr = mem_mapped_addr[1]; | |
2433 | ||
2434 | mb(); | |
2435 | /* Set 2272 bus width (16 bits) and reset */ | |
2436 | writel((1 << CHIP_RESET), dev->rdk2.fpga_base_addr + RDK2_LOCCTLRDK); | |
2437 | udelay(200); | |
2438 | writel((1 << BUS_WIDTH), dev->rdk2.fpga_base_addr + RDK2_LOCCTLRDK); | |
2439 | /* Print fpga version number */ | |
2440 | dev_info(dev->dev, "RDK2 FPGA version %08x\n", | |
2441 | readl(dev->rdk2.fpga_base_addr + RDK2_FPGAREV)); | |
2442 | /* Enable FPGA Interrupts */ | |
2443 | writel((1 << NET2272_PCI_IRQ), dev->rdk2.fpga_base_addr + RDK2_IRQENB); | |
2444 | ||
2445 | return 0; | |
2446 | ||
2447 | err: | |
2448 | while (--i >= 0) { | |
2449 | iounmap(mem_mapped_addr[i]); | |
2450 | release_mem_region(pci_resource_start(pdev, i), | |
2451 | pci_resource_len(pdev, i)); | |
2452 | } | |
2453 | ||
2454 | return ret; | |
2455 | } | |
2456 | ||
41ac7b3a | 2457 | static int |
ceb80363 SL |
2458 | net2272_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
2459 | { | |
2460 | struct net2272 *dev; | |
2461 | int ret; | |
2462 | ||
2463 | dev = net2272_probe_init(&pdev->dev, pdev->irq); | |
2464 | if (IS_ERR(dev)) | |
2465 | return PTR_ERR(dev); | |
2466 | dev->dev_id = pdev->device; | |
2467 | ||
2468 | if (pci_enable_device(pdev) < 0) { | |
2469 | ret = -ENODEV; | |
2470 | goto err_free; | |
2471 | } | |
2472 | ||
2473 | pci_set_master(pdev); | |
2474 | ||
2475 | switch (pdev->device) { | |
2476 | case PCI_DEVICE_ID_RDK1: ret = net2272_rdk1_probe(pdev, dev); break; | |
2477 | case PCI_DEVICE_ID_RDK2: ret = net2272_rdk2_probe(pdev, dev); break; | |
2478 | default: BUG(); | |
2479 | } | |
2480 | if (ret) | |
2481 | goto err_pci; | |
2482 | ||
2483 | ret = net2272_probe_fin(dev, 0); | |
2484 | if (ret) | |
2485 | goto err_pci; | |
2486 | ||
2487 | pci_set_drvdata(pdev, dev); | |
2488 | ||
2489 | return 0; | |
2490 | ||
2491 | err_pci: | |
2492 | pci_disable_device(pdev); | |
2493 | err_free: | |
2494 | kfree(dev); | |
2495 | ||
2496 | return ret; | |
2497 | } | |
2498 | ||
fb4e98ab | 2499 | static void |
ceb80363 SL |
2500 | net2272_rdk1_remove(struct pci_dev *pdev, struct net2272 *dev) |
2501 | { | |
2502 | int i; | |
2503 | ||
2504 | /* disable PLX 9054 interrupts */ | |
2505 | writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) & | |
2506 | ~(1 << PCI_INTERRUPT_ENABLE), | |
2507 | dev->rdk1.plx9054_base_addr + INTCSR); | |
2508 | ||
2509 | /* clean up resources allocated during probe() */ | |
2510 | iounmap(dev->rdk1.plx9054_base_addr); | |
2511 | iounmap(dev->rdk1.epld_base_addr); | |
2512 | ||
2513 | for (i = 0; i < 4; ++i) { | |
2514 | if (i == 1) | |
2515 | continue; /* BAR1 unused */ | |
2516 | release_mem_region(pci_resource_start(pdev, i), | |
2517 | pci_resource_len(pdev, i)); | |
2518 | } | |
2519 | } | |
2520 | ||
fb4e98ab | 2521 | static void |
ceb80363 SL |
2522 | net2272_rdk2_remove(struct pci_dev *pdev, struct net2272 *dev) |
2523 | { | |
2524 | int i; | |
2525 | ||
2526 | /* disable fpga interrupts | |
2527 | writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) & | |
2528 | ~(1 << PCI_INTERRUPT_ENABLE), | |
2529 | dev->rdk1.plx9054_base_addr + INTCSR); | |
2530 | */ | |
2531 | ||
2532 | /* clean up resources allocated during probe() */ | |
2533 | iounmap(dev->rdk2.fpga_base_addr); | |
2534 | ||
2535 | for (i = 0; i < 2; ++i) | |
2536 | release_mem_region(pci_resource_start(pdev, i), | |
2537 | pci_resource_len(pdev, i)); | |
2538 | } | |
2539 | ||
fb4e98ab | 2540 | static void |
ceb80363 SL |
2541 | net2272_pci_remove(struct pci_dev *pdev) |
2542 | { | |
2543 | struct net2272 *dev = pci_get_drvdata(pdev); | |
2544 | ||
2545 | net2272_remove(dev); | |
2546 | ||
2547 | switch (pdev->device) { | |
2548 | case PCI_DEVICE_ID_RDK1: net2272_rdk1_remove(pdev, dev); break; | |
2549 | case PCI_DEVICE_ID_RDK2: net2272_rdk2_remove(pdev, dev); break; | |
2550 | default: BUG(); | |
2551 | } | |
2552 | ||
2553 | pci_disable_device(pdev); | |
2554 | ||
2555 | kfree(dev); | |
2556 | } | |
2557 | ||
2558 | /* Table of matching PCI IDs */ | |
d3608b6d | 2559 | static struct pci_device_id pci_ids[] = { |
ceb80363 SL |
2560 | { /* RDK 1 card */ |
2561 | .class = ((PCI_CLASS_BRIDGE_OTHER << 8) | 0xfe), | |
2562 | .class_mask = 0, | |
2563 | .vendor = PCI_VENDOR_ID_PLX, | |
2564 | .device = PCI_DEVICE_ID_RDK1, | |
2565 | .subvendor = PCI_ANY_ID, | |
2566 | .subdevice = PCI_ANY_ID, | |
2567 | }, | |
2568 | { /* RDK 2 card */ | |
2569 | .class = ((PCI_CLASS_BRIDGE_OTHER << 8) | 0xfe), | |
2570 | .class_mask = 0, | |
2571 | .vendor = PCI_VENDOR_ID_PLX, | |
2572 | .device = PCI_DEVICE_ID_RDK2, | |
2573 | .subvendor = PCI_ANY_ID, | |
2574 | .subdevice = PCI_ANY_ID, | |
2575 | }, | |
2576 | { } | |
2577 | }; | |
2578 | MODULE_DEVICE_TABLE(pci, pci_ids); | |
2579 | ||
2580 | static struct pci_driver net2272_pci_driver = { | |
2581 | .name = driver_name, | |
2582 | .id_table = pci_ids, | |
2583 | ||
2584 | .probe = net2272_pci_probe, | |
7690417d | 2585 | .remove = net2272_pci_remove, |
ceb80363 SL |
2586 | }; |
2587 | ||
e4fe056e SAS |
2588 | static int net2272_pci_register(void) |
2589 | { | |
2590 | return pci_register_driver(&net2272_pci_driver); | |
2591 | } | |
2592 | ||
2593 | static void net2272_pci_unregister(void) | |
2594 | { | |
2595 | pci_unregister_driver(&net2272_pci_driver); | |
2596 | } | |
2597 | ||
ceb80363 | 2598 | #else |
e4fe056e SAS |
2599 | static inline int net2272_pci_register(void) { return 0; } |
2600 | static inline void net2272_pci_unregister(void) { } | |
ceb80363 SL |
2601 | #endif |
2602 | ||
2603 | /*---------------------------------------------------------------------------*/ | |
2604 | ||
41ac7b3a | 2605 | static int |
ceb80363 SL |
2606 | net2272_plat_probe(struct platform_device *pdev) |
2607 | { | |
2608 | struct net2272 *dev; | |
2609 | int ret; | |
2610 | unsigned int irqflags; | |
2611 | resource_size_t base, len; | |
2612 | struct resource *iomem, *iomem_bus, *irq_res; | |
2613 | ||
2614 | irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
2615 | iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
2616 | iomem_bus = platform_get_resource(pdev, IORESOURCE_BUS, 0); | |
2617 | if (!irq_res || !iomem) { | |
2618 | dev_err(&pdev->dev, "must provide irq/base addr"); | |
2619 | return -EINVAL; | |
2620 | } | |
2621 | ||
2622 | dev = net2272_probe_init(&pdev->dev, irq_res->start); | |
2623 | if (IS_ERR(dev)) | |
2624 | return PTR_ERR(dev); | |
2625 | ||
2626 | irqflags = 0; | |
2627 | if (irq_res->flags & IORESOURCE_IRQ_HIGHEDGE) | |
2628 | irqflags |= IRQF_TRIGGER_RISING; | |
2629 | if (irq_res->flags & IORESOURCE_IRQ_LOWEDGE) | |
2630 | irqflags |= IRQF_TRIGGER_FALLING; | |
2631 | if (irq_res->flags & IORESOURCE_IRQ_HIGHLEVEL) | |
2632 | irqflags |= IRQF_TRIGGER_HIGH; | |
2633 | if (irq_res->flags & IORESOURCE_IRQ_LOWLEVEL) | |
2634 | irqflags |= IRQF_TRIGGER_LOW; | |
2635 | ||
2636 | base = iomem->start; | |
2637 | len = resource_size(iomem); | |
2638 | if (iomem_bus) | |
2639 | dev->base_shift = iomem_bus->start; | |
2640 | ||
2641 | if (!request_mem_region(base, len, driver_name)) { | |
2642 | dev_dbg(dev->dev, "get request memory region!\n"); | |
2643 | ret = -EBUSY; | |
2644 | goto err; | |
2645 | } | |
2646 | dev->base_addr = ioremap_nocache(base, len); | |
2647 | if (!dev->base_addr) { | |
2648 | dev_dbg(dev->dev, "can't map memory\n"); | |
2649 | ret = -EFAULT; | |
2650 | goto err_req; | |
2651 | } | |
2652 | ||
2653 | ret = net2272_probe_fin(dev, IRQF_TRIGGER_LOW); | |
2654 | if (ret) | |
2655 | goto err_io; | |
2656 | ||
2657 | platform_set_drvdata(pdev, dev); | |
2658 | dev_info(&pdev->dev, "running in 16-bit, %sbyte swap local bus mode\n", | |
2659 | (net2272_read(dev, LOCCTL) & (1 << BYTE_SWAP)) ? "" : "no "); | |
2660 | ||
ceb80363 SL |
2661 | return 0; |
2662 | ||
2663 | err_io: | |
2664 | iounmap(dev->base_addr); | |
2665 | err_req: | |
2666 | release_mem_region(base, len); | |
2667 | err: | |
2668 | return ret; | |
2669 | } | |
2670 | ||
fb4e98ab | 2671 | static int |
ceb80363 SL |
2672 | net2272_plat_remove(struct platform_device *pdev) |
2673 | { | |
2674 | struct net2272 *dev = platform_get_drvdata(pdev); | |
2675 | ||
2676 | net2272_remove(dev); | |
2677 | ||
2678 | release_mem_region(pdev->resource[0].start, | |
2679 | resource_size(&pdev->resource[0])); | |
2680 | ||
2681 | kfree(dev); | |
2682 | ||
2683 | return 0; | |
2684 | } | |
2685 | ||
2686 | static struct platform_driver net2272_plat_driver = { | |
2687 | .probe = net2272_plat_probe, | |
7690417d | 2688 | .remove = net2272_plat_remove, |
ceb80363 SL |
2689 | .driver = { |
2690 | .name = driver_name, | |
ceb80363 SL |
2691 | }, |
2692 | /* FIXME .suspend, .resume */ | |
2693 | }; | |
86081d7b | 2694 | MODULE_ALIAS("platform:net2272"); |
ceb80363 SL |
2695 | |
2696 | static int __init net2272_init(void) | |
2697 | { | |
e4fe056e SAS |
2698 | int ret; |
2699 | ||
2700 | ret = net2272_pci_register(); | |
2701 | if (ret) | |
2702 | return ret; | |
2703 | ret = platform_driver_register(&net2272_plat_driver); | |
2704 | if (ret) | |
2705 | goto err_pci; | |
2706 | return ret; | |
2707 | ||
2708 | err_pci: | |
2709 | net2272_pci_unregister(); | |
2710 | return ret; | |
ceb80363 SL |
2711 | } |
2712 | module_init(net2272_init); | |
2713 | ||
2714 | static void __exit net2272_cleanup(void) | |
2715 | { | |
e4fe056e | 2716 | net2272_pci_unregister(); |
ceb80363 SL |
2717 | platform_driver_unregister(&net2272_plat_driver); |
2718 | } | |
2719 | module_exit(net2272_cleanup); | |
2720 | ||
2721 | MODULE_DESCRIPTION(DRIVER_DESC); | |
2722 | MODULE_AUTHOR("PLX Technology, Inc."); | |
2723 | MODULE_LICENSE("GPL"); |