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bae4bd84 DB |
1 | /* |
2 | * at91_udc -- driver for at91-series USB peripheral controller | |
3 | * | |
4 | * Copyright (C) 2004 by Thomas Rathbone | |
5 | * Copyright (C) 2005 by HP Labs | |
6 | * Copyright (C) 2005 by David Brownell | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the | |
20 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | * Boston, MA 02111-1307, USA. | |
22 | */ | |
23 | ||
24 | #undef DEBUG | |
25 | #undef VERBOSE | |
26 | #undef PACKET_TRACE | |
27 | ||
bae4bd84 DB |
28 | #include <linux/kernel.h> |
29 | #include <linux/module.h> | |
30 | #include <linux/platform_device.h> | |
31 | #include <linux/delay.h> | |
32 | #include <linux/ioport.h> | |
33 | #include <linux/sched.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/smp_lock.h> | |
36 | #include <linux/errno.h> | |
37 | #include <linux/init.h> | |
38 | #include <linux/list.h> | |
39 | #include <linux/interrupt.h> | |
40 | #include <linux/proc_fs.h> | |
41 | #include <linux/clk.h> | |
5f848137 | 42 | #include <linux/usb/ch9.h> |
bae4bd84 DB |
43 | #include <linux/usb_gadget.h> |
44 | ||
45 | #include <asm/byteorder.h> | |
ffd3326b | 46 | #include <asm/hardware.h> |
bae4bd84 DB |
47 | #include <asm/io.h> |
48 | #include <asm/irq.h> | |
49 | #include <asm/system.h> | |
50 | #include <asm/mach-types.h> | |
51 | ||
bae4bd84 DB |
52 | #include <asm/arch/gpio.h> |
53 | #include <asm/arch/board.h> | |
29ba4b53 AV |
54 | #include <asm/arch/cpu.h> |
55 | #include <asm/arch/at91sam9261_matrix.h> | |
bae4bd84 DB |
56 | |
57 | #include "at91_udc.h" | |
58 | ||
59 | ||
60 | /* | |
61 | * This controller is simple and PIO-only. It's used in many AT91-series | |
8b2e7668 DB |
62 | * full speed USB controllers, including the at91rm9200 (arm920T, with MMU), |
63 | * at91sam926x (arm926ejs, with MMU), and several no-mmu versions. | |
bae4bd84 DB |
64 | * |
65 | * This driver expects the board has been wired with two GPIOs suppporting | |
66 | * a VBUS sensing IRQ, and a D+ pullup. (They may be omitted, but the | |
8b2e7668 DB |
67 | * testing hasn't covered such cases.) |
68 | * | |
69 | * The pullup is most important (so it's integrated on sam926x parts). It | |
bae4bd84 | 70 | * provides software control over whether the host enumerates the device. |
8b2e7668 | 71 | * |
bae4bd84 DB |
72 | * The VBUS sensing helps during enumeration, and allows both USB clocks |
73 | * (and the transceiver) to stay gated off until they're necessary, saving | |
8b2e7668 DB |
74 | * power. During USB suspend, the 48 MHz clock is gated off in hardware; |
75 | * it may also be gated off by software during some Linux sleep states. | |
bae4bd84 DB |
76 | */ |
77 | ||
8b2e7668 | 78 | #define DRIVER_VERSION "3 May 2006" |
bae4bd84 DB |
79 | |
80 | static const char driver_name [] = "at91_udc"; | |
81 | static const char ep0name[] = "ep0"; | |
82 | ||
bae4bd84 | 83 | |
ffd3326b AV |
84 | #define at91_udp_read(dev, reg) \ |
85 | __raw_readl((dev)->udp_baseaddr + (reg)) | |
86 | #define at91_udp_write(dev, reg, val) \ | |
87 | __raw_writel((val), (dev)->udp_baseaddr + (reg)) | |
bae4bd84 DB |
88 | |
89 | /*-------------------------------------------------------------------------*/ | |
90 | ||
91 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
92 | ||
93 | #include <linux/seq_file.h> | |
94 | ||
95 | static const char debug_filename[] = "driver/udc"; | |
96 | ||
97 | #define FOURBITS "%s%s%s%s" | |
98 | #define EIGHTBITS FOURBITS FOURBITS | |
99 | ||
100 | static void proc_ep_show(struct seq_file *s, struct at91_ep *ep) | |
101 | { | |
102 | static char *types[] = { | |
103 | "control", "out-iso", "out-bulk", "out-int", | |
104 | "BOGUS", "in-iso", "in-bulk", "in-int"}; | |
105 | ||
106 | u32 csr; | |
107 | struct at91_request *req; | |
108 | unsigned long flags; | |
109 | ||
110 | local_irq_save(flags); | |
111 | ||
112 | csr = __raw_readl(ep->creg); | |
113 | ||
114 | /* NOTE: not collecting per-endpoint irq statistics... */ | |
115 | ||
116 | seq_printf(s, "\n"); | |
117 | seq_printf(s, "%s, maxpacket %d %s%s %s%s\n", | |
118 | ep->ep.name, ep->ep.maxpacket, | |
119 | ep->is_in ? "in" : "out", | |
120 | ep->is_iso ? " iso" : "", | |
121 | ep->is_pingpong | |
122 | ? (ep->fifo_bank ? "pong" : "ping") | |
123 | : "", | |
124 | ep->stopped ? " stopped" : ""); | |
125 | seq_printf(s, "csr %08x rxbytes=%d %s %s %s" EIGHTBITS "\n", | |
126 | csr, | |
127 | (csr & 0x07ff0000) >> 16, | |
128 | (csr & (1 << 15)) ? "enabled" : "disabled", | |
129 | (csr & (1 << 11)) ? "DATA1" : "DATA0", | |
130 | types[(csr & 0x700) >> 8], | |
131 | ||
132 | /* iff type is control then print current direction */ | |
133 | (!(csr & 0x700)) | |
134 | ? ((csr & (1 << 7)) ? " IN" : " OUT") | |
135 | : "", | |
136 | (csr & (1 << 6)) ? " rxdatabk1" : "", | |
137 | (csr & (1 << 5)) ? " forcestall" : "", | |
138 | (csr & (1 << 4)) ? " txpktrdy" : "", | |
139 | ||
140 | (csr & (1 << 3)) ? " stallsent" : "", | |
141 | (csr & (1 << 2)) ? " rxsetup" : "", | |
142 | (csr & (1 << 1)) ? " rxdatabk0" : "", | |
143 | (csr & (1 << 0)) ? " txcomp" : ""); | |
144 | if (list_empty (&ep->queue)) | |
145 | seq_printf(s, "\t(queue empty)\n"); | |
146 | ||
147 | else list_for_each_entry (req, &ep->queue, queue) { | |
148 | unsigned length = req->req.actual; | |
149 | ||
150 | seq_printf(s, "\treq %p len %d/%d buf %p\n", | |
151 | &req->req, length, | |
152 | req->req.length, req->req.buf); | |
153 | } | |
154 | local_irq_restore(flags); | |
155 | } | |
156 | ||
157 | static void proc_irq_show(struct seq_file *s, const char *label, u32 mask) | |
158 | { | |
159 | int i; | |
160 | ||
161 | seq_printf(s, "%s %04x:%s%s" FOURBITS, label, mask, | |
162 | (mask & (1 << 13)) ? " wakeup" : "", | |
163 | (mask & (1 << 12)) ? " endbusres" : "", | |
164 | ||
165 | (mask & (1 << 11)) ? " sofint" : "", | |
166 | (mask & (1 << 10)) ? " extrsm" : "", | |
167 | (mask & (1 << 9)) ? " rxrsm" : "", | |
168 | (mask & (1 << 8)) ? " rxsusp" : ""); | |
169 | for (i = 0; i < 8; i++) { | |
170 | if (mask & (1 << i)) | |
171 | seq_printf(s, " ep%d", i); | |
172 | } | |
173 | seq_printf(s, "\n"); | |
174 | } | |
175 | ||
176 | static int proc_udc_show(struct seq_file *s, void *unused) | |
177 | { | |
178 | struct at91_udc *udc = s->private; | |
179 | struct at91_ep *ep; | |
180 | u32 tmp; | |
181 | ||
182 | seq_printf(s, "%s: version %s\n", driver_name, DRIVER_VERSION); | |
183 | ||
184 | seq_printf(s, "vbus %s, pullup %s, %s powered%s, gadget %s\n\n", | |
185 | udc->vbus ? "present" : "off", | |
186 | udc->enabled | |
187 | ? (udc->vbus ? "active" : "enabled") | |
188 | : "disabled", | |
189 | udc->selfpowered ? "self" : "VBUS", | |
190 | udc->suspended ? ", suspended" : "", | |
191 | udc->driver ? udc->driver->driver.name : "(none)"); | |
192 | ||
193 | /* don't access registers when interface isn't clocked */ | |
194 | if (!udc->clocked) { | |
195 | seq_printf(s, "(not clocked)\n"); | |
196 | return 0; | |
197 | } | |
198 | ||
ffd3326b | 199 | tmp = at91_udp_read(udc, AT91_UDP_FRM_NUM); |
bae4bd84 DB |
200 | seq_printf(s, "frame %05x:%s%s frame=%d\n", tmp, |
201 | (tmp & AT91_UDP_FRM_OK) ? " ok" : "", | |
202 | (tmp & AT91_UDP_FRM_ERR) ? " err" : "", | |
203 | (tmp & AT91_UDP_NUM)); | |
204 | ||
ffd3326b | 205 | tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT); |
bae4bd84 DB |
206 | seq_printf(s, "glbstate %02x:%s" FOURBITS "\n", tmp, |
207 | (tmp & AT91_UDP_RMWUPE) ? " rmwupe" : "", | |
208 | (tmp & AT91_UDP_RSMINPR) ? " rsminpr" : "", | |
209 | (tmp & AT91_UDP_ESR) ? " esr" : "", | |
210 | (tmp & AT91_UDP_CONFG) ? " confg" : "", | |
211 | (tmp & AT91_UDP_FADDEN) ? " fadden" : ""); | |
212 | ||
ffd3326b | 213 | tmp = at91_udp_read(udc, AT91_UDP_FADDR); |
bae4bd84 DB |
214 | seq_printf(s, "faddr %03x:%s fadd=%d\n", tmp, |
215 | (tmp & AT91_UDP_FEN) ? " fen" : "", | |
216 | (tmp & AT91_UDP_FADD)); | |
217 | ||
ffd3326b AV |
218 | proc_irq_show(s, "imr ", at91_udp_read(udc, AT91_UDP_IMR)); |
219 | proc_irq_show(s, "isr ", at91_udp_read(udc, AT91_UDP_ISR)); | |
bae4bd84 DB |
220 | |
221 | if (udc->enabled && udc->vbus) { | |
222 | proc_ep_show(s, &udc->ep[0]); | |
223 | list_for_each_entry (ep, &udc->gadget.ep_list, ep.ep_list) { | |
224 | if (ep->desc) | |
225 | proc_ep_show(s, ep); | |
226 | } | |
227 | } | |
228 | return 0; | |
229 | } | |
230 | ||
231 | static int proc_udc_open(struct inode *inode, struct file *file) | |
232 | { | |
233 | return single_open(file, proc_udc_show, PDE(inode)->data); | |
234 | } | |
235 | ||
066202dd | 236 | static const struct file_operations proc_ops = { |
bae4bd84 DB |
237 | .open = proc_udc_open, |
238 | .read = seq_read, | |
239 | .llseek = seq_lseek, | |
240 | .release = single_release, | |
241 | }; | |
242 | ||
243 | static void create_debug_file(struct at91_udc *udc) | |
244 | { | |
245 | struct proc_dir_entry *pde; | |
246 | ||
247 | pde = create_proc_entry (debug_filename, 0, NULL); | |
248 | udc->pde = pde; | |
249 | if (pde == NULL) | |
250 | return; | |
251 | ||
252 | pde->proc_fops = &proc_ops; | |
253 | pde->data = udc; | |
254 | } | |
255 | ||
256 | static void remove_debug_file(struct at91_udc *udc) | |
257 | { | |
258 | if (udc->pde) | |
259 | remove_proc_entry(debug_filename, NULL); | |
260 | } | |
261 | ||
262 | #else | |
263 | ||
264 | static inline void create_debug_file(struct at91_udc *udc) {} | |
265 | static inline void remove_debug_file(struct at91_udc *udc) {} | |
266 | ||
267 | #endif | |
268 | ||
269 | ||
270 | /*-------------------------------------------------------------------------*/ | |
271 | ||
272 | static void done(struct at91_ep *ep, struct at91_request *req, int status) | |
273 | { | |
274 | unsigned stopped = ep->stopped; | |
ffd3326b | 275 | struct at91_udc *udc = ep->udc; |
bae4bd84 DB |
276 | |
277 | list_del_init(&req->queue); | |
278 | if (req->req.status == -EINPROGRESS) | |
279 | req->req.status = status; | |
280 | else | |
281 | status = req->req.status; | |
282 | if (status && status != -ESHUTDOWN) | |
283 | VDBG("%s done %p, status %d\n", ep->ep.name, req, status); | |
284 | ||
285 | ep->stopped = 1; | |
286 | req->req.complete(&ep->ep, &req->req); | |
287 | ep->stopped = stopped; | |
288 | ||
289 | /* ep0 is always ready; other endpoints need a non-empty queue */ | |
290 | if (list_empty(&ep->queue) && ep->int_mask != (1 << 0)) | |
ffd3326b | 291 | at91_udp_write(udc, AT91_UDP_IDR, ep->int_mask); |
bae4bd84 DB |
292 | } |
293 | ||
294 | /*-------------------------------------------------------------------------*/ | |
295 | ||
296 | /* bits indicating OUT fifo has data ready */ | |
297 | #define RX_DATA_READY (AT91_UDP_RX_DATA_BK0 | AT91_UDP_RX_DATA_BK1) | |
298 | ||
299 | /* | |
300 | * Endpoint FIFO CSR bits have a mix of bits, making it unsafe to just write | |
301 | * back most of the value you just read (because of side effects, including | |
302 | * bits that may change after reading and before writing). | |
303 | * | |
304 | * Except when changing a specific bit, always write values which: | |
305 | * - clear SET_FX bits (setting them could change something) | |
306 | * - set CLR_FX bits (clearing them could change something) | |
307 | * | |
308 | * There are also state bits like FORCESTALL, EPEDS, DIR, and EPTYPE | |
309 | * that shouldn't normally be changed. | |
8b2e7668 DB |
310 | * |
311 | * NOTE at91sam9260 docs mention synch between UDPCK and MCK clock domains, | |
312 | * implying a need to wait for one write to complete (test relevant bits) | |
313 | * before starting the next write. This shouldn't be an issue given how | |
314 | * infrequently we write, except maybe for write-then-read idioms. | |
bae4bd84 DB |
315 | */ |
316 | #define SET_FX (AT91_UDP_TXPKTRDY) | |
8b2e7668 DB |
317 | #define CLR_FX (RX_DATA_READY | AT91_UDP_RXSETUP \ |
318 | | AT91_UDP_STALLSENT | AT91_UDP_TXCOMP) | |
bae4bd84 DB |
319 | |
320 | /* pull OUT packet data from the endpoint's fifo */ | |
321 | static int read_fifo (struct at91_ep *ep, struct at91_request *req) | |
322 | { | |
323 | u32 __iomem *creg = ep->creg; | |
324 | u8 __iomem *dreg = ep->creg + (AT91_UDP_FDR(0) - AT91_UDP_CSR(0)); | |
325 | u32 csr; | |
326 | u8 *buf; | |
327 | unsigned int count, bufferspace, is_done; | |
328 | ||
329 | buf = req->req.buf + req->req.actual; | |
330 | bufferspace = req->req.length - req->req.actual; | |
331 | ||
332 | /* | |
333 | * there might be nothing to read if ep_queue() calls us, | |
334 | * or if we already emptied both pingpong buffers | |
335 | */ | |
336 | rescan: | |
337 | csr = __raw_readl(creg); | |
338 | if ((csr & RX_DATA_READY) == 0) | |
339 | return 0; | |
340 | ||
341 | count = (csr & AT91_UDP_RXBYTECNT) >> 16; | |
342 | if (count > ep->ep.maxpacket) | |
343 | count = ep->ep.maxpacket; | |
344 | if (count > bufferspace) { | |
345 | DBG("%s buffer overflow\n", ep->ep.name); | |
346 | req->req.status = -EOVERFLOW; | |
347 | count = bufferspace; | |
348 | } | |
349 | __raw_readsb(dreg, buf, count); | |
350 | ||
351 | /* release and swap pingpong mem bank */ | |
352 | csr |= CLR_FX; | |
353 | if (ep->is_pingpong) { | |
354 | if (ep->fifo_bank == 0) { | |
355 | csr &= ~(SET_FX | AT91_UDP_RX_DATA_BK0); | |
356 | ep->fifo_bank = 1; | |
357 | } else { | |
358 | csr &= ~(SET_FX | AT91_UDP_RX_DATA_BK1); | |
359 | ep->fifo_bank = 0; | |
360 | } | |
361 | } else | |
362 | csr &= ~(SET_FX | AT91_UDP_RX_DATA_BK0); | |
363 | __raw_writel(csr, creg); | |
364 | ||
365 | req->req.actual += count; | |
366 | is_done = (count < ep->ep.maxpacket); | |
367 | if (count == bufferspace) | |
368 | is_done = 1; | |
369 | ||
370 | PACKET("%s %p out/%d%s\n", ep->ep.name, &req->req, count, | |
371 | is_done ? " (done)" : ""); | |
372 | ||
373 | /* | |
374 | * avoid extra trips through IRQ logic for packets already in | |
375 | * the fifo ... maybe preventing an extra (expensive) OUT-NAK | |
376 | */ | |
377 | if (is_done) | |
378 | done(ep, req, 0); | |
379 | else if (ep->is_pingpong) { | |
380 | bufferspace -= count; | |
381 | buf += count; | |
382 | goto rescan; | |
383 | } | |
384 | ||
385 | return is_done; | |
386 | } | |
387 | ||
388 | /* load fifo for an IN packet */ | |
389 | static int write_fifo(struct at91_ep *ep, struct at91_request *req) | |
390 | { | |
391 | u32 __iomem *creg = ep->creg; | |
392 | u32 csr = __raw_readl(creg); | |
393 | u8 __iomem *dreg = ep->creg + (AT91_UDP_FDR(0) - AT91_UDP_CSR(0)); | |
394 | unsigned total, count, is_last; | |
395 | ||
396 | /* | |
397 | * TODO: allow for writing two packets to the fifo ... that'll | |
398 | * reduce the amount of IN-NAKing, but probably won't affect | |
399 | * throughput much. (Unlike preventing OUT-NAKing!) | |
400 | */ | |
401 | ||
402 | /* | |
403 | * If ep_queue() calls us, the queue is empty and possibly in | |
404 | * odd states like TXCOMP not yet cleared (we do it, saving at | |
405 | * least one IRQ) or the fifo not yet being free. Those aren't | |
406 | * issues normally (IRQ handler fast path). | |
407 | */ | |
408 | if (unlikely(csr & (AT91_UDP_TXCOMP | AT91_UDP_TXPKTRDY))) { | |
409 | if (csr & AT91_UDP_TXCOMP) { | |
410 | csr |= CLR_FX; | |
411 | csr &= ~(SET_FX | AT91_UDP_TXCOMP); | |
412 | __raw_writel(csr, creg); | |
413 | csr = __raw_readl(creg); | |
414 | } | |
415 | if (csr & AT91_UDP_TXPKTRDY) | |
416 | return 0; | |
417 | } | |
418 | ||
419 | total = req->req.length - req->req.actual; | |
420 | if (ep->ep.maxpacket < total) { | |
421 | count = ep->ep.maxpacket; | |
422 | is_last = 0; | |
423 | } else { | |
424 | count = total; | |
425 | is_last = (count < ep->ep.maxpacket) || !req->req.zero; | |
426 | } | |
427 | ||
428 | /* | |
429 | * Write the packet, maybe it's a ZLP. | |
430 | * | |
431 | * NOTE: incrementing req->actual before we receive the ACK means | |
432 | * gadget driver IN bytecounts can be wrong in fault cases. That's | |
433 | * fixable with PIO drivers like this one (save "count" here, and | |
434 | * do the increment later on TX irq), but not for most DMA hardware. | |
435 | * | |
436 | * So all gadget drivers must accept that potential error. Some | |
437 | * hardware supports precise fifo status reporting, letting them | |
438 | * recover when the actual bytecount matters (e.g. for USB Test | |
439 | * and Measurement Class devices). | |
440 | */ | |
441 | __raw_writesb(dreg, req->req.buf + req->req.actual, count); | |
442 | csr &= ~SET_FX; | |
443 | csr |= CLR_FX | AT91_UDP_TXPKTRDY; | |
444 | __raw_writel(csr, creg); | |
445 | req->req.actual += count; | |
446 | ||
447 | PACKET("%s %p in/%d%s\n", ep->ep.name, &req->req, count, | |
448 | is_last ? " (done)" : ""); | |
449 | if (is_last) | |
450 | done(ep, req, 0); | |
451 | return is_last; | |
452 | } | |
453 | ||
454 | static void nuke(struct at91_ep *ep, int status) | |
455 | { | |
456 | struct at91_request *req; | |
457 | ||
458 | // terminer chaque requete dans la queue | |
459 | ep->stopped = 1; | |
460 | if (list_empty(&ep->queue)) | |
461 | return; | |
462 | ||
463 | VDBG("%s %s\n", __FUNCTION__, ep->ep.name); | |
464 | while (!list_empty(&ep->queue)) { | |
465 | req = list_entry(ep->queue.next, struct at91_request, queue); | |
466 | done(ep, req, status); | |
467 | } | |
468 | } | |
469 | ||
470 | /*-------------------------------------------------------------------------*/ | |
471 | ||
8b2e7668 DB |
472 | static int at91_ep_enable(struct usb_ep *_ep, |
473 | const struct usb_endpoint_descriptor *desc) | |
bae4bd84 DB |
474 | { |
475 | struct at91_ep *ep = container_of(_ep, struct at91_ep, ep); | |
476 | struct at91_udc *dev = ep->udc; | |
477 | u16 maxpacket; | |
478 | u32 tmp; | |
479 | unsigned long flags; | |
480 | ||
481 | if (!_ep || !ep | |
482 | || !desc || ep->desc | |
483 | || _ep->name == ep0name | |
484 | || desc->bDescriptorType != USB_DT_ENDPOINT | |
485 | || (maxpacket = le16_to_cpu(desc->wMaxPacketSize)) == 0 | |
486 | || maxpacket > ep->maxpacket) { | |
487 | DBG("bad ep or descriptor\n"); | |
488 | return -EINVAL; | |
489 | } | |
490 | ||
491 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) { | |
492 | DBG("bogus device state\n"); | |
493 | return -ESHUTDOWN; | |
494 | } | |
495 | ||
496 | tmp = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; | |
497 | switch (tmp) { | |
498 | case USB_ENDPOINT_XFER_CONTROL: | |
499 | DBG("only one control endpoint\n"); | |
500 | return -EINVAL; | |
501 | case USB_ENDPOINT_XFER_INT: | |
502 | if (maxpacket > 64) | |
503 | goto bogus_max; | |
504 | break; | |
505 | case USB_ENDPOINT_XFER_BULK: | |
506 | switch (maxpacket) { | |
507 | case 8: | |
508 | case 16: | |
509 | case 32: | |
510 | case 64: | |
511 | goto ok; | |
512 | } | |
513 | bogus_max: | |
514 | DBG("bogus maxpacket %d\n", maxpacket); | |
515 | return -EINVAL; | |
516 | case USB_ENDPOINT_XFER_ISOC: | |
517 | if (!ep->is_pingpong) { | |
518 | DBG("iso requires double buffering\n"); | |
519 | return -EINVAL; | |
520 | } | |
521 | break; | |
522 | } | |
523 | ||
524 | ok: | |
525 | local_irq_save(flags); | |
526 | ||
527 | /* initialize endpoint to match this descriptor */ | |
528 | ep->is_in = (desc->bEndpointAddress & USB_DIR_IN) != 0; | |
529 | ep->is_iso = (tmp == USB_ENDPOINT_XFER_ISOC); | |
530 | ep->stopped = 0; | |
531 | if (ep->is_in) | |
532 | tmp |= 0x04; | |
533 | tmp <<= 8; | |
534 | tmp |= AT91_UDP_EPEDS; | |
535 | __raw_writel(tmp, ep->creg); | |
536 | ||
537 | ep->desc = desc; | |
538 | ep->ep.maxpacket = maxpacket; | |
539 | ||
540 | /* | |
541 | * reset/init endpoint fifo. NOTE: leaves fifo_bank alone, | |
542 | * since endpoint resets don't reset hw pingpong state. | |
543 | */ | |
ffd3326b AV |
544 | at91_udp_write(dev, AT91_UDP_RST_EP, ep->int_mask); |
545 | at91_udp_write(dev, AT91_UDP_RST_EP, 0); | |
bae4bd84 DB |
546 | |
547 | local_irq_restore(flags); | |
548 | return 0; | |
549 | } | |
550 | ||
551 | static int at91_ep_disable (struct usb_ep * _ep) | |
552 | { | |
553 | struct at91_ep *ep = container_of(_ep, struct at91_ep, ep); | |
ffd3326b | 554 | struct at91_udc *udc = ep->udc; |
bae4bd84 DB |
555 | unsigned long flags; |
556 | ||
557 | if (ep == &ep->udc->ep[0]) | |
558 | return -EINVAL; | |
559 | ||
560 | local_irq_save(flags); | |
561 | ||
562 | nuke(ep, -ESHUTDOWN); | |
563 | ||
564 | /* restore the endpoint's pristine config */ | |
565 | ep->desc = NULL; | |
566 | ep->ep.maxpacket = ep->maxpacket; | |
567 | ||
568 | /* reset fifos and endpoint */ | |
569 | if (ep->udc->clocked) { | |
ffd3326b AV |
570 | at91_udp_write(udc, AT91_UDP_RST_EP, ep->int_mask); |
571 | at91_udp_write(udc, AT91_UDP_RST_EP, 0); | |
bae4bd84 DB |
572 | __raw_writel(0, ep->creg); |
573 | } | |
574 | ||
575 | local_irq_restore(flags); | |
576 | return 0; | |
577 | } | |
578 | ||
579 | /* | |
580 | * this is a PIO-only driver, so there's nothing | |
581 | * interesting for request or buffer allocation. | |
582 | */ | |
583 | ||
8b2e7668 DB |
584 | static struct usb_request * |
585 | at91_ep_alloc_request(struct usb_ep *_ep, unsigned int gfp_flags) | |
bae4bd84 DB |
586 | { |
587 | struct at91_request *req; | |
588 | ||
cd861280 | 589 | req = kzalloc(sizeof (struct at91_request), gfp_flags); |
bae4bd84 DB |
590 | if (!req) |
591 | return NULL; | |
592 | ||
593 | INIT_LIST_HEAD(&req->queue); | |
594 | return &req->req; | |
595 | } | |
596 | ||
597 | static void at91_ep_free_request(struct usb_ep *_ep, struct usb_request *_req) | |
598 | { | |
599 | struct at91_request *req; | |
600 | ||
601 | req = container_of(_req, struct at91_request, req); | |
602 | BUG_ON(!list_empty(&req->queue)); | |
603 | kfree(req); | |
604 | } | |
605 | ||
606 | static void *at91_ep_alloc_buffer( | |
607 | struct usb_ep *_ep, | |
608 | unsigned bytes, | |
609 | dma_addr_t *dma, | |
610 | gfp_t gfp_flags) | |
611 | { | |
612 | *dma = ~0; | |
613 | return kmalloc(bytes, gfp_flags); | |
614 | } | |
615 | ||
616 | static void at91_ep_free_buffer( | |
617 | struct usb_ep *ep, | |
618 | void *buf, | |
619 | dma_addr_t dma, | |
620 | unsigned bytes) | |
621 | { | |
622 | kfree(buf); | |
623 | } | |
624 | ||
625 | static int at91_ep_queue(struct usb_ep *_ep, | |
626 | struct usb_request *_req, gfp_t gfp_flags) | |
627 | { | |
628 | struct at91_request *req; | |
629 | struct at91_ep *ep; | |
630 | struct at91_udc *dev; | |
631 | int status; | |
632 | unsigned long flags; | |
633 | ||
634 | req = container_of(_req, struct at91_request, req); | |
635 | ep = container_of(_ep, struct at91_ep, ep); | |
636 | ||
637 | if (!_req || !_req->complete | |
638 | || !_req->buf || !list_empty(&req->queue)) { | |
639 | DBG("invalid request\n"); | |
640 | return -EINVAL; | |
641 | } | |
642 | ||
643 | if (!_ep || (!ep->desc && ep->ep.name != ep0name)) { | |
644 | DBG("invalid ep\n"); | |
645 | return -EINVAL; | |
646 | } | |
647 | ||
648 | dev = ep->udc; | |
649 | ||
650 | if (!dev || !dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) { | |
651 | DBG("invalid device\n"); | |
652 | return -EINVAL; | |
653 | } | |
654 | ||
655 | _req->status = -EINPROGRESS; | |
656 | _req->actual = 0; | |
657 | ||
658 | local_irq_save(flags); | |
659 | ||
660 | /* try to kickstart any empty and idle queue */ | |
661 | if (list_empty(&ep->queue) && !ep->stopped) { | |
662 | int is_ep0; | |
663 | ||
664 | /* | |
665 | * If this control request has a non-empty DATA stage, this | |
666 | * will start that stage. It works just like a non-control | |
667 | * request (until the status stage starts, maybe early). | |
668 | * | |
669 | * If the data stage is empty, then this starts a successful | |
670 | * IN/STATUS stage. (Unsuccessful ones use set_halt.) | |
671 | */ | |
672 | is_ep0 = (ep->ep.name == ep0name); | |
673 | if (is_ep0) { | |
674 | u32 tmp; | |
675 | ||
676 | if (!dev->req_pending) { | |
677 | status = -EINVAL; | |
678 | goto done; | |
679 | } | |
680 | ||
681 | /* | |
682 | * defer changing CONFG until after the gadget driver | |
683 | * reconfigures the endpoints. | |
684 | */ | |
685 | if (dev->wait_for_config_ack) { | |
ffd3326b | 686 | tmp = at91_udp_read(dev, AT91_UDP_GLB_STAT); |
bae4bd84 DB |
687 | tmp ^= AT91_UDP_CONFG; |
688 | VDBG("toggle config\n"); | |
ffd3326b | 689 | at91_udp_write(dev, AT91_UDP_GLB_STAT, tmp); |
bae4bd84 DB |
690 | } |
691 | if (req->req.length == 0) { | |
692 | ep0_in_status: | |
693 | PACKET("ep0 in/status\n"); | |
694 | status = 0; | |
695 | tmp = __raw_readl(ep->creg); | |
696 | tmp &= ~SET_FX; | |
697 | tmp |= CLR_FX | AT91_UDP_TXPKTRDY; | |
698 | __raw_writel(tmp, ep->creg); | |
699 | dev->req_pending = 0; | |
700 | goto done; | |
701 | } | |
702 | } | |
703 | ||
704 | if (ep->is_in) | |
705 | status = write_fifo(ep, req); | |
706 | else { | |
707 | status = read_fifo(ep, req); | |
708 | ||
709 | /* IN/STATUS stage is otherwise triggered by irq */ | |
710 | if (status && is_ep0) | |
711 | goto ep0_in_status; | |
712 | } | |
713 | } else | |
714 | status = 0; | |
715 | ||
716 | if (req && !status) { | |
717 | list_add_tail (&req->queue, &ep->queue); | |
ffd3326b | 718 | at91_udp_write(dev, AT91_UDP_IER, ep->int_mask); |
bae4bd84 DB |
719 | } |
720 | done: | |
721 | local_irq_restore(flags); | |
722 | return (status < 0) ? status : 0; | |
723 | } | |
724 | ||
725 | static int at91_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) | |
726 | { | |
727 | struct at91_ep *ep; | |
728 | struct at91_request *req; | |
729 | ||
730 | ep = container_of(_ep, struct at91_ep, ep); | |
731 | if (!_ep || ep->ep.name == ep0name) | |
732 | return -EINVAL; | |
733 | ||
734 | /* make sure it's actually queued on this endpoint */ | |
735 | list_for_each_entry (req, &ep->queue, queue) { | |
736 | if (&req->req == _req) | |
737 | break; | |
738 | } | |
739 | if (&req->req != _req) | |
740 | return -EINVAL; | |
741 | ||
742 | done(ep, req, -ECONNRESET); | |
743 | return 0; | |
744 | } | |
745 | ||
746 | static int at91_ep_set_halt(struct usb_ep *_ep, int value) | |
747 | { | |
748 | struct at91_ep *ep = container_of(_ep, struct at91_ep, ep); | |
ffd3326b | 749 | struct at91_udc *udc = ep->udc; |
bae4bd84 DB |
750 | u32 __iomem *creg; |
751 | u32 csr; | |
752 | unsigned long flags; | |
753 | int status = 0; | |
754 | ||
755 | if (!_ep || ep->is_iso || !ep->udc->clocked) | |
756 | return -EINVAL; | |
757 | ||
758 | creg = ep->creg; | |
759 | local_irq_save(flags); | |
760 | ||
761 | csr = __raw_readl(creg); | |
762 | ||
763 | /* | |
764 | * fail with still-busy IN endpoints, ensuring correct sequencing | |
765 | * of data tx then stall. note that the fifo rx bytecount isn't | |
766 | * completely accurate as a tx bytecount. | |
767 | */ | |
768 | if (ep->is_in && (!list_empty(&ep->queue) || (csr >> 16) != 0)) | |
769 | status = -EAGAIN; | |
770 | else { | |
771 | csr |= CLR_FX; | |
772 | csr &= ~SET_FX; | |
773 | if (value) { | |
774 | csr |= AT91_UDP_FORCESTALL; | |
775 | VDBG("halt %s\n", ep->ep.name); | |
776 | } else { | |
ffd3326b AV |
777 | at91_udp_write(udc, AT91_UDP_RST_EP, ep->int_mask); |
778 | at91_udp_write(udc, AT91_UDP_RST_EP, 0); | |
bae4bd84 DB |
779 | csr &= ~AT91_UDP_FORCESTALL; |
780 | } | |
781 | __raw_writel(csr, creg); | |
782 | } | |
783 | ||
784 | local_irq_restore(flags); | |
785 | return status; | |
786 | } | |
787 | ||
788 | static struct usb_ep_ops at91_ep_ops = { | |
789 | .enable = at91_ep_enable, | |
790 | .disable = at91_ep_disable, | |
791 | .alloc_request = at91_ep_alloc_request, | |
792 | .free_request = at91_ep_free_request, | |
793 | .alloc_buffer = at91_ep_alloc_buffer, | |
794 | .free_buffer = at91_ep_free_buffer, | |
795 | .queue = at91_ep_queue, | |
796 | .dequeue = at91_ep_dequeue, | |
797 | .set_halt = at91_ep_set_halt, | |
798 | // there's only imprecise fifo status reporting | |
799 | }; | |
800 | ||
801 | /*-------------------------------------------------------------------------*/ | |
802 | ||
803 | static int at91_get_frame(struct usb_gadget *gadget) | |
804 | { | |
ffd3326b AV |
805 | struct at91_udc *udc = to_udc(gadget); |
806 | ||
bae4bd84 DB |
807 | if (!to_udc(gadget)->clocked) |
808 | return -EINVAL; | |
ffd3326b | 809 | return at91_udp_read(udc, AT91_UDP_FRM_NUM) & AT91_UDP_NUM; |
bae4bd84 DB |
810 | } |
811 | ||
812 | static int at91_wakeup(struct usb_gadget *gadget) | |
813 | { | |
814 | struct at91_udc *udc = to_udc(gadget); | |
815 | u32 glbstate; | |
816 | int status = -EINVAL; | |
817 | unsigned long flags; | |
818 | ||
819 | DBG("%s\n", __FUNCTION__ ); | |
820 | local_irq_save(flags); | |
821 | ||
822 | if (!udc->clocked || !udc->suspended) | |
823 | goto done; | |
824 | ||
825 | /* NOTE: some "early versions" handle ESR differently ... */ | |
826 | ||
ffd3326b | 827 | glbstate = at91_udp_read(udc, AT91_UDP_GLB_STAT); |
bae4bd84 DB |
828 | if (!(glbstate & AT91_UDP_ESR)) |
829 | goto done; | |
830 | glbstate |= AT91_UDP_ESR; | |
ffd3326b | 831 | at91_udp_write(udc, AT91_UDP_GLB_STAT, glbstate); |
bae4bd84 DB |
832 | |
833 | done: | |
834 | local_irq_restore(flags); | |
835 | return status; | |
836 | } | |
837 | ||
838 | /* reinit == restore inital software state */ | |
839 | static void udc_reinit(struct at91_udc *udc) | |
840 | { | |
841 | u32 i; | |
842 | ||
843 | INIT_LIST_HEAD(&udc->gadget.ep_list); | |
844 | INIT_LIST_HEAD(&udc->gadget.ep0->ep_list); | |
845 | ||
846 | for (i = 0; i < NUM_ENDPOINTS; i++) { | |
847 | struct at91_ep *ep = &udc->ep[i]; | |
848 | ||
849 | if (i != 0) | |
850 | list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list); | |
851 | ep->desc = NULL; | |
852 | ep->stopped = 0; | |
853 | ep->fifo_bank = 0; | |
854 | ep->ep.maxpacket = ep->maxpacket; | |
ffd3326b | 855 | ep->creg = (void __iomem *) udc->udp_baseaddr + AT91_UDP_CSR(i); |
bae4bd84 DB |
856 | // initialiser une queue par endpoint |
857 | INIT_LIST_HEAD(&ep->queue); | |
858 | } | |
859 | } | |
860 | ||
861 | static void stop_activity(struct at91_udc *udc) | |
862 | { | |
863 | struct usb_gadget_driver *driver = udc->driver; | |
864 | int i; | |
865 | ||
866 | if (udc->gadget.speed == USB_SPEED_UNKNOWN) | |
867 | driver = NULL; | |
868 | udc->gadget.speed = USB_SPEED_UNKNOWN; | |
8b2e7668 | 869 | udc->suspended = 0; |
bae4bd84 DB |
870 | |
871 | for (i = 0; i < NUM_ENDPOINTS; i++) { | |
872 | struct at91_ep *ep = &udc->ep[i]; | |
873 | ep->stopped = 1; | |
874 | nuke(ep, -ESHUTDOWN); | |
875 | } | |
876 | if (driver) | |
877 | driver->disconnect(&udc->gadget); | |
878 | ||
879 | udc_reinit(udc); | |
880 | } | |
881 | ||
882 | static void clk_on(struct at91_udc *udc) | |
883 | { | |
884 | if (udc->clocked) | |
885 | return; | |
886 | udc->clocked = 1; | |
887 | clk_enable(udc->iclk); | |
888 | clk_enable(udc->fclk); | |
889 | } | |
890 | ||
891 | static void clk_off(struct at91_udc *udc) | |
892 | { | |
893 | if (!udc->clocked) | |
894 | return; | |
895 | udc->clocked = 0; | |
896 | udc->gadget.speed = USB_SPEED_UNKNOWN; | |
bae4bd84 | 897 | clk_disable(udc->fclk); |
8b2e7668 | 898 | clk_disable(udc->iclk); |
bae4bd84 DB |
899 | } |
900 | ||
901 | /* | |
902 | * activate/deactivate link with host; minimize power usage for | |
903 | * inactive links by cutting clocks and transceiver power. | |
904 | */ | |
905 | static void pullup(struct at91_udc *udc, int is_on) | |
906 | { | |
907 | if (!udc->enabled || !udc->vbus) | |
908 | is_on = 0; | |
909 | DBG("%sactive\n", is_on ? "" : "in"); | |
ffd3326b | 910 | |
bae4bd84 DB |
911 | if (is_on) { |
912 | clk_on(udc); | |
ffd3326b | 913 | at91_udp_write(udc, AT91_UDP_TXVC, 0); |
29ba4b53 AV |
914 | if (cpu_is_at91rm9200()) |
915 | at91_set_gpio_value(udc->board.pullup_pin, 1); | |
916 | else if (cpu_is_at91sam9260()) { | |
917 | u32 txvc = at91_udp_read(udc, AT91_UDP_TXVC); | |
918 | ||
919 | txvc |= AT91_UDP_TXVC_PUON; | |
920 | at91_udp_write(udc, AT91_UDP_TXVC, txvc); | |
921 | } else if (cpu_is_at91sam9261()) { | |
922 | u32 usbpucr; | |
923 | ||
924 | usbpucr = at91_sys_read(AT91_MATRIX_USBPUCR); | |
925 | usbpucr |= AT91_MATRIX_USBPUCR_PUON; | |
926 | at91_sys_write(AT91_MATRIX_USBPUCR, usbpucr); | |
927 | } | |
ffd3326b | 928 | } else { |
bae4bd84 | 929 | stop_activity(udc); |
ffd3326b | 930 | at91_udp_write(udc, AT91_UDP_TXVC, AT91_UDP_TXVC_TXVDIS); |
29ba4b53 AV |
931 | if (cpu_is_at91rm9200()) |
932 | at91_set_gpio_value(udc->board.pullup_pin, 0); | |
933 | else if (cpu_is_at91sam9260()) { | |
934 | u32 txvc = at91_udp_read(udc, AT91_UDP_TXVC); | |
935 | ||
936 | txvc &= ~AT91_UDP_TXVC_PUON; | |
937 | at91_udp_write(udc, AT91_UDP_TXVC, txvc); | |
938 | } else if (cpu_is_at91sam9261()) { | |
939 | u32 usbpucr; | |
940 | ||
941 | usbpucr = at91_sys_read(AT91_MATRIX_USBPUCR); | |
942 | usbpucr &= ~AT91_MATRIX_USBPUCR_PUON; | |
943 | at91_sys_write(AT91_MATRIX_USBPUCR, usbpucr); | |
944 | } | |
bae4bd84 | 945 | clk_off(udc); |
bae4bd84 DB |
946 | } |
947 | } | |
948 | ||
949 | /* vbus is here! turn everything on that's ready */ | |
950 | static int at91_vbus_session(struct usb_gadget *gadget, int is_active) | |
951 | { | |
952 | struct at91_udc *udc = to_udc(gadget); | |
953 | unsigned long flags; | |
954 | ||
955 | // VDBG("vbus %s\n", is_active ? "on" : "off"); | |
956 | local_irq_save(flags); | |
957 | udc->vbus = (is_active != 0); | |
bfb7fb79 WK |
958 | if (udc->driver) |
959 | pullup(udc, is_active); | |
960 | else | |
961 | pullup(udc, 0); | |
bae4bd84 DB |
962 | local_irq_restore(flags); |
963 | return 0; | |
964 | } | |
965 | ||
966 | static int at91_pullup(struct usb_gadget *gadget, int is_on) | |
967 | { | |
968 | struct at91_udc *udc = to_udc(gadget); | |
969 | unsigned long flags; | |
970 | ||
971 | local_irq_save(flags); | |
972 | udc->enabled = is_on = !!is_on; | |
973 | pullup(udc, is_on); | |
974 | local_irq_restore(flags); | |
975 | return 0; | |
976 | } | |
977 | ||
978 | static int at91_set_selfpowered(struct usb_gadget *gadget, int is_on) | |
979 | { | |
980 | struct at91_udc *udc = to_udc(gadget); | |
981 | unsigned long flags; | |
982 | ||
983 | local_irq_save(flags); | |
984 | udc->selfpowered = (is_on != 0); | |
985 | local_irq_restore(flags); | |
986 | return 0; | |
987 | } | |
988 | ||
989 | static const struct usb_gadget_ops at91_udc_ops = { | |
990 | .get_frame = at91_get_frame, | |
991 | .wakeup = at91_wakeup, | |
992 | .set_selfpowered = at91_set_selfpowered, | |
993 | .vbus_session = at91_vbus_session, | |
994 | .pullup = at91_pullup, | |
995 | ||
996 | /* | |
997 | * VBUS-powered devices may also also want to support bigger | |
998 | * power budgets after an appropriate SET_CONFIGURATION. | |
999 | */ | |
1000 | // .vbus_power = at91_vbus_power, | |
1001 | }; | |
1002 | ||
1003 | /*-------------------------------------------------------------------------*/ | |
1004 | ||
1005 | static int handle_ep(struct at91_ep *ep) | |
1006 | { | |
1007 | struct at91_request *req; | |
1008 | u32 __iomem *creg = ep->creg; | |
1009 | u32 csr = __raw_readl(creg); | |
1010 | ||
1011 | if (!list_empty(&ep->queue)) | |
1012 | req = list_entry(ep->queue.next, | |
1013 | struct at91_request, queue); | |
1014 | else | |
1015 | req = NULL; | |
1016 | ||
1017 | if (ep->is_in) { | |
1018 | if (csr & (AT91_UDP_STALLSENT | AT91_UDP_TXCOMP)) { | |
1019 | csr |= CLR_FX; | |
1020 | csr &= ~(SET_FX | AT91_UDP_STALLSENT | AT91_UDP_TXCOMP); | |
1021 | __raw_writel(csr, creg); | |
1022 | } | |
1023 | if (req) | |
1024 | return write_fifo(ep, req); | |
1025 | ||
1026 | } else { | |
1027 | if (csr & AT91_UDP_STALLSENT) { | |
1028 | /* STALLSENT bit == ISOERR */ | |
1029 | if (ep->is_iso && req) | |
1030 | req->req.status = -EILSEQ; | |
1031 | csr |= CLR_FX; | |
1032 | csr &= ~(SET_FX | AT91_UDP_STALLSENT); | |
1033 | __raw_writel(csr, creg); | |
1034 | csr = __raw_readl(creg); | |
1035 | } | |
1036 | if (req && (csr & RX_DATA_READY)) | |
1037 | return read_fifo(ep, req); | |
1038 | } | |
1039 | return 0; | |
1040 | } | |
1041 | ||
1042 | union setup { | |
1043 | u8 raw[8]; | |
1044 | struct usb_ctrlrequest r; | |
1045 | }; | |
1046 | ||
1047 | static void handle_setup(struct at91_udc *udc, struct at91_ep *ep, u32 csr) | |
1048 | { | |
1049 | u32 __iomem *creg = ep->creg; | |
1050 | u8 __iomem *dreg = ep->creg + (AT91_UDP_FDR(0) - AT91_UDP_CSR(0)); | |
1051 | unsigned rxcount, i = 0; | |
1052 | u32 tmp; | |
1053 | union setup pkt; | |
1054 | int status = 0; | |
1055 | ||
1056 | /* read and ack SETUP; hard-fail for bogus packets */ | |
1057 | rxcount = (csr & AT91_UDP_RXBYTECNT) >> 16; | |
1058 | if (likely(rxcount == 8)) { | |
1059 | while (rxcount--) | |
1060 | pkt.raw[i++] = __raw_readb(dreg); | |
1061 | if (pkt.r.bRequestType & USB_DIR_IN) { | |
1062 | csr |= AT91_UDP_DIR; | |
1063 | ep->is_in = 1; | |
1064 | } else { | |
1065 | csr &= ~AT91_UDP_DIR; | |
1066 | ep->is_in = 0; | |
1067 | } | |
1068 | } else { | |
1069 | // REVISIT this happens sometimes under load; why?? | |
1070 | ERR("SETUP len %d, csr %08x\n", rxcount, csr); | |
1071 | status = -EINVAL; | |
1072 | } | |
1073 | csr |= CLR_FX; | |
1074 | csr &= ~(SET_FX | AT91_UDP_RXSETUP); | |
1075 | __raw_writel(csr, creg); | |
1076 | udc->wait_for_addr_ack = 0; | |
1077 | udc->wait_for_config_ack = 0; | |
1078 | ep->stopped = 0; | |
1079 | if (unlikely(status != 0)) | |
1080 | goto stall; | |
1081 | ||
1082 | #define w_index le16_to_cpu(pkt.r.wIndex) | |
1083 | #define w_value le16_to_cpu(pkt.r.wValue) | |
1084 | #define w_length le16_to_cpu(pkt.r.wLength) | |
1085 | ||
1086 | VDBG("SETUP %02x.%02x v%04x i%04x l%04x\n", | |
1087 | pkt.r.bRequestType, pkt.r.bRequest, | |
1088 | w_value, w_index, w_length); | |
1089 | ||
1090 | /* | |
1091 | * A few standard requests get handled here, ones that touch | |
1092 | * hardware ... notably for device and endpoint features. | |
1093 | */ | |
1094 | udc->req_pending = 1; | |
1095 | csr = __raw_readl(creg); | |
1096 | csr |= CLR_FX; | |
1097 | csr &= ~SET_FX; | |
1098 | switch ((pkt.r.bRequestType << 8) | pkt.r.bRequest) { | |
1099 | ||
1100 | case ((USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8) | |
1101 | | USB_REQ_SET_ADDRESS: | |
1102 | __raw_writel(csr | AT91_UDP_TXPKTRDY, creg); | |
1103 | udc->addr = w_value; | |
1104 | udc->wait_for_addr_ack = 1; | |
1105 | udc->req_pending = 0; | |
1106 | /* FADDR is set later, when we ack host STATUS */ | |
1107 | return; | |
1108 | ||
1109 | case ((USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8) | |
1110 | | USB_REQ_SET_CONFIGURATION: | |
ffd3326b | 1111 | tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT) & AT91_UDP_CONFG; |
bae4bd84 DB |
1112 | if (pkt.r.wValue) |
1113 | udc->wait_for_config_ack = (tmp == 0); | |
1114 | else | |
1115 | udc->wait_for_config_ack = (tmp != 0); | |
1116 | if (udc->wait_for_config_ack) | |
1117 | VDBG("wait for config\n"); | |
1118 | /* CONFG is toggled later, if gadget driver succeeds */ | |
1119 | break; | |
1120 | ||
1121 | /* | |
1122 | * Hosts may set or clear remote wakeup status, and | |
1123 | * devices may report they're VBUS powered. | |
1124 | */ | |
1125 | case ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8) | |
1126 | | USB_REQ_GET_STATUS: | |
1127 | tmp = (udc->selfpowered << USB_DEVICE_SELF_POWERED); | |
ffd3326b | 1128 | if (at91_udp_read(udc, AT91_UDP_GLB_STAT) & AT91_UDP_ESR) |
bae4bd84 DB |
1129 | tmp |= (1 << USB_DEVICE_REMOTE_WAKEUP); |
1130 | PACKET("get device status\n"); | |
1131 | __raw_writeb(tmp, dreg); | |
1132 | __raw_writeb(0, dreg); | |
1133 | goto write_in; | |
1134 | /* then STATUS starts later, automatically */ | |
1135 | case ((USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8) | |
1136 | | USB_REQ_SET_FEATURE: | |
1137 | if (w_value != USB_DEVICE_REMOTE_WAKEUP) | |
1138 | goto stall; | |
ffd3326b | 1139 | tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT); |
bae4bd84 | 1140 | tmp |= AT91_UDP_ESR; |
ffd3326b | 1141 | at91_udp_write(udc, AT91_UDP_GLB_STAT, tmp); |
bae4bd84 DB |
1142 | goto succeed; |
1143 | case ((USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8) | |
1144 | | USB_REQ_CLEAR_FEATURE: | |
1145 | if (w_value != USB_DEVICE_REMOTE_WAKEUP) | |
1146 | goto stall; | |
ffd3326b | 1147 | tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT); |
bae4bd84 | 1148 | tmp &= ~AT91_UDP_ESR; |
ffd3326b | 1149 | at91_udp_write(udc, AT91_UDP_GLB_STAT, tmp); |
bae4bd84 DB |
1150 | goto succeed; |
1151 | ||
1152 | /* | |
1153 | * Interfaces have no feature settings; this is pretty useless. | |
1154 | * we won't even insist the interface exists... | |
1155 | */ | |
1156 | case ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE) << 8) | |
1157 | | USB_REQ_GET_STATUS: | |
1158 | PACKET("get interface status\n"); | |
1159 | __raw_writeb(0, dreg); | |
1160 | __raw_writeb(0, dreg); | |
1161 | goto write_in; | |
1162 | /* then STATUS starts later, automatically */ | |
1163 | case ((USB_TYPE_STANDARD|USB_RECIP_INTERFACE) << 8) | |
1164 | | USB_REQ_SET_FEATURE: | |
1165 | case ((USB_TYPE_STANDARD|USB_RECIP_INTERFACE) << 8) | |
1166 | | USB_REQ_CLEAR_FEATURE: | |
1167 | goto stall; | |
1168 | ||
1169 | /* | |
1170 | * Hosts may clear bulk/intr endpoint halt after the gadget | |
1171 | * driver sets it (not widely used); or set it (for testing) | |
1172 | */ | |
1173 | case ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_ENDPOINT) << 8) | |
1174 | | USB_REQ_GET_STATUS: | |
1175 | tmp = w_index & USB_ENDPOINT_NUMBER_MASK; | |
1176 | ep = &udc->ep[tmp]; | |
1177 | if (tmp > NUM_ENDPOINTS || (tmp && !ep->desc)) | |
1178 | goto stall; | |
1179 | ||
1180 | if (tmp) { | |
1181 | if ((w_index & USB_DIR_IN)) { | |
1182 | if (!ep->is_in) | |
1183 | goto stall; | |
1184 | } else if (ep->is_in) | |
1185 | goto stall; | |
1186 | } | |
1187 | PACKET("get %s status\n", ep->ep.name); | |
1188 | if (__raw_readl(ep->creg) & AT91_UDP_FORCESTALL) | |
1189 | tmp = (1 << USB_ENDPOINT_HALT); | |
1190 | else | |
1191 | tmp = 0; | |
1192 | __raw_writeb(tmp, dreg); | |
1193 | __raw_writeb(0, dreg); | |
1194 | goto write_in; | |
1195 | /* then STATUS starts later, automatically */ | |
1196 | case ((USB_TYPE_STANDARD|USB_RECIP_ENDPOINT) << 8) | |
1197 | | USB_REQ_SET_FEATURE: | |
1198 | tmp = w_index & USB_ENDPOINT_NUMBER_MASK; | |
1199 | ep = &udc->ep[tmp]; | |
1200 | if (w_value != USB_ENDPOINT_HALT || tmp > NUM_ENDPOINTS) | |
1201 | goto stall; | |
1202 | if (!ep->desc || ep->is_iso) | |
1203 | goto stall; | |
1204 | if ((w_index & USB_DIR_IN)) { | |
1205 | if (!ep->is_in) | |
1206 | goto stall; | |
1207 | } else if (ep->is_in) | |
1208 | goto stall; | |
1209 | ||
1210 | tmp = __raw_readl(ep->creg); | |
1211 | tmp &= ~SET_FX; | |
1212 | tmp |= CLR_FX | AT91_UDP_FORCESTALL; | |
1213 | __raw_writel(tmp, ep->creg); | |
1214 | goto succeed; | |
1215 | case ((USB_TYPE_STANDARD|USB_RECIP_ENDPOINT) << 8) | |
1216 | | USB_REQ_CLEAR_FEATURE: | |
1217 | tmp = w_index & USB_ENDPOINT_NUMBER_MASK; | |
1218 | ep = &udc->ep[tmp]; | |
1219 | if (w_value != USB_ENDPOINT_HALT || tmp > NUM_ENDPOINTS) | |
1220 | goto stall; | |
1221 | if (tmp == 0) | |
1222 | goto succeed; | |
1223 | if (!ep->desc || ep->is_iso) | |
1224 | goto stall; | |
1225 | if ((w_index & USB_DIR_IN)) { | |
1226 | if (!ep->is_in) | |
1227 | goto stall; | |
1228 | } else if (ep->is_in) | |
1229 | goto stall; | |
1230 | ||
ffd3326b AV |
1231 | at91_udp_write(udc, AT91_UDP_RST_EP, ep->int_mask); |
1232 | at91_udp_write(udc, AT91_UDP_RST_EP, 0); | |
bae4bd84 DB |
1233 | tmp = __raw_readl(ep->creg); |
1234 | tmp |= CLR_FX; | |
1235 | tmp &= ~(SET_FX | AT91_UDP_FORCESTALL); | |
1236 | __raw_writel(tmp, ep->creg); | |
1237 | if (!list_empty(&ep->queue)) | |
1238 | handle_ep(ep); | |
1239 | goto succeed; | |
1240 | } | |
1241 | ||
1242 | #undef w_value | |
1243 | #undef w_index | |
1244 | #undef w_length | |
1245 | ||
1246 | /* pass request up to the gadget driver */ | |
bfb7fb79 WK |
1247 | if (udc->driver) |
1248 | status = udc->driver->setup(&udc->gadget, &pkt.r); | |
1249 | else | |
1250 | status = -ENODEV; | |
bae4bd84 DB |
1251 | if (status < 0) { |
1252 | stall: | |
1253 | VDBG("req %02x.%02x protocol STALL; stat %d\n", | |
1254 | pkt.r.bRequestType, pkt.r.bRequest, status); | |
1255 | csr |= AT91_UDP_FORCESTALL; | |
1256 | __raw_writel(csr, creg); | |
1257 | udc->req_pending = 0; | |
1258 | } | |
1259 | return; | |
1260 | ||
1261 | succeed: | |
1262 | /* immediate successful (IN) STATUS after zero length DATA */ | |
1263 | PACKET("ep0 in/status\n"); | |
1264 | write_in: | |
1265 | csr |= AT91_UDP_TXPKTRDY; | |
1266 | __raw_writel(csr, creg); | |
1267 | udc->req_pending = 0; | |
1268 | return; | |
1269 | } | |
1270 | ||
1271 | static void handle_ep0(struct at91_udc *udc) | |
1272 | { | |
1273 | struct at91_ep *ep0 = &udc->ep[0]; | |
1274 | u32 __iomem *creg = ep0->creg; | |
1275 | u32 csr = __raw_readl(creg); | |
1276 | struct at91_request *req; | |
1277 | ||
1278 | if (unlikely(csr & AT91_UDP_STALLSENT)) { | |
1279 | nuke(ep0, -EPROTO); | |
1280 | udc->req_pending = 0; | |
1281 | csr |= CLR_FX; | |
1282 | csr &= ~(SET_FX | AT91_UDP_STALLSENT | AT91_UDP_FORCESTALL); | |
1283 | __raw_writel(csr, creg); | |
1284 | VDBG("ep0 stalled\n"); | |
1285 | csr = __raw_readl(creg); | |
1286 | } | |
1287 | if (csr & AT91_UDP_RXSETUP) { | |
1288 | nuke(ep0, 0); | |
1289 | udc->req_pending = 0; | |
1290 | handle_setup(udc, ep0, csr); | |
1291 | return; | |
1292 | } | |
1293 | ||
1294 | if (list_empty(&ep0->queue)) | |
1295 | req = NULL; | |
1296 | else | |
1297 | req = list_entry(ep0->queue.next, struct at91_request, queue); | |
1298 | ||
1299 | /* host ACKed an IN packet that we sent */ | |
1300 | if (csr & AT91_UDP_TXCOMP) { | |
1301 | csr |= CLR_FX; | |
1302 | csr &= ~(SET_FX | AT91_UDP_TXCOMP); | |
1303 | ||
1304 | /* write more IN DATA? */ | |
1305 | if (req && ep0->is_in) { | |
1306 | if (handle_ep(ep0)) | |
1307 | udc->req_pending = 0; | |
1308 | ||
1309 | /* | |
1310 | * Ack after: | |
1311 | * - last IN DATA packet (including GET_STATUS) | |
1312 | * - IN/STATUS for OUT DATA | |
1313 | * - IN/STATUS for any zero-length DATA stage | |
1314 | * except for the IN DATA case, the host should send | |
1315 | * an OUT status later, which we'll ack. | |
1316 | */ | |
1317 | } else { | |
1318 | udc->req_pending = 0; | |
1319 | __raw_writel(csr, creg); | |
1320 | ||
1321 | /* | |
1322 | * SET_ADDRESS takes effect only after the STATUS | |
1323 | * (to the original address) gets acked. | |
1324 | */ | |
1325 | if (udc->wait_for_addr_ack) { | |
1326 | u32 tmp; | |
1327 | ||
ffd3326b | 1328 | at91_udp_write(udc, AT91_UDP_FADDR, |
8b2e7668 | 1329 | AT91_UDP_FEN | udc->addr); |
ffd3326b | 1330 | tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT); |
bae4bd84 DB |
1331 | tmp &= ~AT91_UDP_FADDEN; |
1332 | if (udc->addr) | |
1333 | tmp |= AT91_UDP_FADDEN; | |
ffd3326b | 1334 | at91_udp_write(udc, AT91_UDP_GLB_STAT, tmp); |
bae4bd84 DB |
1335 | |
1336 | udc->wait_for_addr_ack = 0; | |
1337 | VDBG("address %d\n", udc->addr); | |
1338 | } | |
1339 | } | |
1340 | } | |
1341 | ||
1342 | /* OUT packet arrived ... */ | |
1343 | else if (csr & AT91_UDP_RX_DATA_BK0) { | |
1344 | csr |= CLR_FX; | |
1345 | csr &= ~(SET_FX | AT91_UDP_RX_DATA_BK0); | |
1346 | ||
1347 | /* OUT DATA stage */ | |
1348 | if (!ep0->is_in) { | |
1349 | if (req) { | |
1350 | if (handle_ep(ep0)) { | |
1351 | /* send IN/STATUS */ | |
1352 | PACKET("ep0 in/status\n"); | |
1353 | csr = __raw_readl(creg); | |
1354 | csr &= ~SET_FX; | |
1355 | csr |= CLR_FX | AT91_UDP_TXPKTRDY; | |
1356 | __raw_writel(csr, creg); | |
1357 | udc->req_pending = 0; | |
1358 | } | |
1359 | } else if (udc->req_pending) { | |
1360 | /* | |
1361 | * AT91 hardware has a hard time with this | |
1362 | * "deferred response" mode for control-OUT | |
1363 | * transfers. (For control-IN it's fine.) | |
1364 | * | |
1365 | * The normal solution leaves OUT data in the | |
1366 | * fifo until the gadget driver is ready. | |
1367 | * We couldn't do that here without disabling | |
1368 | * the IRQ that tells about SETUP packets, | |
1369 | * e.g. when the host gets impatient... | |
1370 | * | |
1371 | * Working around it by copying into a buffer | |
1372 | * would almost be a non-deferred response, | |
1373 | * except that it wouldn't permit reliable | |
1374 | * stalling of the request. Instead, demand | |
1375 | * that gadget drivers not use this mode. | |
1376 | */ | |
1377 | DBG("no control-OUT deferred responses!\n"); | |
1378 | __raw_writel(csr | AT91_UDP_FORCESTALL, creg); | |
1379 | udc->req_pending = 0; | |
1380 | } | |
1381 | ||
1382 | /* STATUS stage for control-IN; ack. */ | |
1383 | } else { | |
1384 | PACKET("ep0 out/status ACK\n"); | |
1385 | __raw_writel(csr, creg); | |
1386 | ||
1387 | /* "early" status stage */ | |
1388 | if (req) | |
1389 | done(ep0, req, 0); | |
1390 | } | |
1391 | } | |
1392 | } | |
1393 | ||
7d12e780 | 1394 | static irqreturn_t at91_udc_irq (int irq, void *_udc) |
bae4bd84 DB |
1395 | { |
1396 | struct at91_udc *udc = _udc; | |
1397 | u32 rescans = 5; | |
1398 | ||
1399 | while (rescans--) { | |
8b2e7668 | 1400 | u32 status; |
bae4bd84 | 1401 | |
ffd3326b AV |
1402 | status = at91_udp_read(udc, AT91_UDP_ISR) |
1403 | & at91_udp_read(udc, AT91_UDP_IMR); | |
bae4bd84 DB |
1404 | if (!status) |
1405 | break; | |
1406 | ||
1407 | /* USB reset irq: not maskable */ | |
1408 | if (status & AT91_UDP_ENDBUSRES) { | |
ffd3326b AV |
1409 | at91_udp_write(udc, AT91_UDP_IDR, ~MINIMUS_INTERRUPTUS); |
1410 | at91_udp_write(udc, AT91_UDP_IER, MINIMUS_INTERRUPTUS); | |
bae4bd84 | 1411 | /* Atmel code clears this irq twice */ |
ffd3326b AV |
1412 | at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_ENDBUSRES); |
1413 | at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_ENDBUSRES); | |
bae4bd84 DB |
1414 | VDBG("end bus reset\n"); |
1415 | udc->addr = 0; | |
1416 | stop_activity(udc); | |
1417 | ||
1418 | /* enable ep0 */ | |
ffd3326b | 1419 | at91_udp_write(udc, AT91_UDP_CSR(0), |
8b2e7668 | 1420 | AT91_UDP_EPEDS | AT91_UDP_EPTYPE_CTRL); |
bae4bd84 DB |
1421 | udc->gadget.speed = USB_SPEED_FULL; |
1422 | udc->suspended = 0; | |
ffd3326b | 1423 | at91_udp_write(udc, AT91_UDP_IER, AT91_UDP_EP(0)); |
bae4bd84 DB |
1424 | |
1425 | /* | |
1426 | * NOTE: this driver keeps clocks off unless the | |
8b2e7668 DB |
1427 | * USB host is present. That saves power, but for |
1428 | * boards that don't support VBUS detection, both | |
1429 | * clocks need to be active most of the time. | |
bae4bd84 DB |
1430 | */ |
1431 | ||
1432 | /* host initiated suspend (3+ms bus idle) */ | |
1433 | } else if (status & AT91_UDP_RXSUSP) { | |
ffd3326b AV |
1434 | at91_udp_write(udc, AT91_UDP_IDR, AT91_UDP_RXSUSP); |
1435 | at91_udp_write(udc, AT91_UDP_IER, AT91_UDP_RXRSM); | |
1436 | at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_RXSUSP); | |
bae4bd84 DB |
1437 | // VDBG("bus suspend\n"); |
1438 | if (udc->suspended) | |
1439 | continue; | |
1440 | udc->suspended = 1; | |
1441 | ||
1442 | /* | |
1443 | * NOTE: when suspending a VBUS-powered device, the | |
1444 | * gadget driver should switch into slow clock mode | |
1445 | * and then into standby to avoid drawing more than | |
1446 | * 500uA power (2500uA for some high-power configs). | |
1447 | */ | |
1448 | if (udc->driver && udc->driver->suspend) | |
1449 | udc->driver->suspend(&udc->gadget); | |
1450 | ||
1451 | /* host initiated resume */ | |
1452 | } else if (status & AT91_UDP_RXRSM) { | |
ffd3326b AV |
1453 | at91_udp_write(udc, AT91_UDP_IDR, AT91_UDP_RXRSM); |
1454 | at91_udp_write(udc, AT91_UDP_IER, AT91_UDP_RXSUSP); | |
1455 | at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_RXRSM); | |
bae4bd84 DB |
1456 | // VDBG("bus resume\n"); |
1457 | if (!udc->suspended) | |
1458 | continue; | |
1459 | udc->suspended = 0; | |
1460 | ||
1461 | /* | |
1462 | * NOTE: for a VBUS-powered device, the gadget driver | |
1463 | * would normally want to switch out of slow clock | |
1464 | * mode into normal mode. | |
1465 | */ | |
1466 | if (udc->driver && udc->driver->resume) | |
1467 | udc->driver->resume(&udc->gadget); | |
1468 | ||
1469 | /* endpoint IRQs are cleared by handling them */ | |
1470 | } else { | |
1471 | int i; | |
1472 | unsigned mask = 1; | |
1473 | struct at91_ep *ep = &udc->ep[1]; | |
1474 | ||
1475 | if (status & mask) | |
1476 | handle_ep0(udc); | |
1477 | for (i = 1; i < NUM_ENDPOINTS; i++) { | |
1478 | mask <<= 1; | |
1479 | if (status & mask) | |
1480 | handle_ep(ep); | |
1481 | ep++; | |
1482 | } | |
1483 | } | |
1484 | } | |
1485 | ||
1486 | return IRQ_HANDLED; | |
1487 | } | |
1488 | ||
1489 | /*-------------------------------------------------------------------------*/ | |
1490 | ||
8b2e7668 DB |
1491 | static void nop_release(struct device *dev) |
1492 | { | |
1493 | /* nothing to free */ | |
1494 | } | |
1495 | ||
bae4bd84 DB |
1496 | static struct at91_udc controller = { |
1497 | .gadget = { | |
8b2e7668 DB |
1498 | .ops = &at91_udc_ops, |
1499 | .ep0 = &controller.ep[0].ep, | |
1500 | .name = driver_name, | |
1501 | .dev = { | |
1502 | .bus_id = "gadget", | |
1503 | .release = nop_release, | |
bae4bd84 DB |
1504 | } |
1505 | }, | |
1506 | .ep[0] = { | |
1507 | .ep = { | |
1508 | .name = ep0name, | |
1509 | .ops = &at91_ep_ops, | |
1510 | }, | |
1511 | .udc = &controller, | |
1512 | .maxpacket = 8, | |
bae4bd84 DB |
1513 | .int_mask = 1 << 0, |
1514 | }, | |
1515 | .ep[1] = { | |
1516 | .ep = { | |
1517 | .name = "ep1", | |
1518 | .ops = &at91_ep_ops, | |
1519 | }, | |
1520 | .udc = &controller, | |
1521 | .is_pingpong = 1, | |
1522 | .maxpacket = 64, | |
bae4bd84 DB |
1523 | .int_mask = 1 << 1, |
1524 | }, | |
1525 | .ep[2] = { | |
1526 | .ep = { | |
1527 | .name = "ep2", | |
1528 | .ops = &at91_ep_ops, | |
1529 | }, | |
1530 | .udc = &controller, | |
1531 | .is_pingpong = 1, | |
1532 | .maxpacket = 64, | |
bae4bd84 DB |
1533 | .int_mask = 1 << 2, |
1534 | }, | |
1535 | .ep[3] = { | |
1536 | .ep = { | |
1537 | /* could actually do bulk too */ | |
1538 | .name = "ep3-int", | |
1539 | .ops = &at91_ep_ops, | |
1540 | }, | |
1541 | .udc = &controller, | |
1542 | .maxpacket = 8, | |
bae4bd84 DB |
1543 | .int_mask = 1 << 3, |
1544 | }, | |
1545 | .ep[4] = { | |
1546 | .ep = { | |
1547 | .name = "ep4", | |
1548 | .ops = &at91_ep_ops, | |
1549 | }, | |
1550 | .udc = &controller, | |
1551 | .is_pingpong = 1, | |
1552 | .maxpacket = 256, | |
bae4bd84 DB |
1553 | .int_mask = 1 << 4, |
1554 | }, | |
1555 | .ep[5] = { | |
1556 | .ep = { | |
1557 | .name = "ep5", | |
1558 | .ops = &at91_ep_ops, | |
1559 | }, | |
1560 | .udc = &controller, | |
1561 | .is_pingpong = 1, | |
1562 | .maxpacket = 256, | |
bae4bd84 DB |
1563 | .int_mask = 1 << 5, |
1564 | }, | |
8b2e7668 | 1565 | /* ep6 and ep7 are also reserved (custom silicon might use them) */ |
bae4bd84 DB |
1566 | }; |
1567 | ||
7d12e780 | 1568 | static irqreturn_t at91_vbus_irq(int irq, void *_udc) |
bae4bd84 DB |
1569 | { |
1570 | struct at91_udc *udc = _udc; | |
1571 | unsigned value; | |
1572 | ||
1573 | /* vbus needs at least brief debouncing */ | |
1574 | udelay(10); | |
1575 | value = at91_get_gpio_value(udc->board.vbus_pin); | |
1576 | if (value != udc->vbus) | |
1577 | at91_vbus_session(&udc->gadget, value); | |
1578 | ||
1579 | return IRQ_HANDLED; | |
1580 | } | |
1581 | ||
1582 | int usb_gadget_register_driver (struct usb_gadget_driver *driver) | |
1583 | { | |
1584 | struct at91_udc *udc = &controller; | |
1585 | int retval; | |
1586 | ||
1587 | if (!driver | |
bc92c32a | 1588 | || driver->speed < USB_SPEED_FULL |
bae4bd84 | 1589 | || !driver->bind |
bae4bd84 DB |
1590 | || !driver->setup) { |
1591 | DBG("bad parameter.\n"); | |
1592 | return -EINVAL; | |
1593 | } | |
1594 | ||
1595 | if (udc->driver) { | |
1596 | DBG("UDC already has a gadget driver\n"); | |
1597 | return -EBUSY; | |
1598 | } | |
1599 | ||
1600 | udc->driver = driver; | |
1601 | udc->gadget.dev.driver = &driver->driver; | |
1602 | udc->gadget.dev.driver_data = &driver->driver; | |
1603 | udc->enabled = 1; | |
1604 | udc->selfpowered = 1; | |
1605 | ||
1606 | retval = driver->bind(&udc->gadget); | |
1607 | if (retval) { | |
1608 | DBG("driver->bind() returned %d\n", retval); | |
1609 | udc->driver = NULL; | |
943c4419 WK |
1610 | udc->gadget.dev.driver = NULL; |
1611 | udc->gadget.dev.driver_data = NULL; | |
1612 | udc->enabled = 0; | |
1613 | udc->selfpowered = 0; | |
bae4bd84 DB |
1614 | return retval; |
1615 | } | |
1616 | ||
1617 | local_irq_disable(); | |
1618 | pullup(udc, 1); | |
1619 | local_irq_enable(); | |
1620 | ||
1621 | DBG("bound to %s\n", driver->driver.name); | |
1622 | return 0; | |
1623 | } | |
1624 | EXPORT_SYMBOL (usb_gadget_register_driver); | |
1625 | ||
1626 | int usb_gadget_unregister_driver (struct usb_gadget_driver *driver) | |
1627 | { | |
1628 | struct at91_udc *udc = &controller; | |
1629 | ||
6bea476c | 1630 | if (!driver || driver != udc->driver || !driver->unbind) |
bae4bd84 DB |
1631 | return -EINVAL; |
1632 | ||
1633 | local_irq_disable(); | |
1634 | udc->enabled = 0; | |
ffd3326b | 1635 | at91_udp_write(udc, AT91_UDP_IDR, ~0); |
bae4bd84 DB |
1636 | pullup(udc, 0); |
1637 | local_irq_enable(); | |
1638 | ||
1639 | driver->unbind(&udc->gadget); | |
1640 | udc->driver = NULL; | |
1641 | ||
1642 | DBG("unbound from %s\n", driver->driver.name); | |
1643 | return 0; | |
1644 | } | |
1645 | EXPORT_SYMBOL (usb_gadget_unregister_driver); | |
1646 | ||
1647 | /*-------------------------------------------------------------------------*/ | |
1648 | ||
1649 | static void at91udc_shutdown(struct platform_device *dev) | |
1650 | { | |
1651 | /* force disconnect on reboot */ | |
1652 | pullup(platform_get_drvdata(dev), 0); | |
1653 | } | |
1654 | ||
1655 | static int __devinit at91udc_probe(struct platform_device *pdev) | |
1656 | { | |
1657 | struct device *dev = &pdev->dev; | |
1658 | struct at91_udc *udc; | |
1659 | int retval; | |
ffd3326b | 1660 | struct resource *res; |
bae4bd84 DB |
1661 | |
1662 | if (!dev->platform_data) { | |
1663 | /* small (so we copy it) but critical! */ | |
1664 | DBG("missing platform_data\n"); | |
1665 | return -ENODEV; | |
1666 | } | |
1667 | ||
8b2e7668 DB |
1668 | if (pdev->num_resources != 2) { |
1669 | DBG("invalid num_resources"); | |
1670 | return -ENODEV; | |
1671 | } | |
1672 | if ((pdev->resource[0].flags != IORESOURCE_MEM) | |
1673 | || (pdev->resource[1].flags != IORESOURCE_IRQ)) { | |
1674 | DBG("invalid resource type"); | |
1675 | return -ENODEV; | |
1676 | } | |
1677 | ||
ffd3326b AV |
1678 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
1679 | if (!res) | |
1680 | return -ENXIO; | |
1681 | ||
1682 | if (!request_mem_region(res->start, | |
1683 | res->end - res->start + 1, | |
1684 | driver_name)) { | |
bae4bd84 DB |
1685 | DBG("someone's using UDC memory\n"); |
1686 | return -EBUSY; | |
1687 | } | |
1688 | ||
1689 | /* init software state */ | |
1690 | udc = &controller; | |
1691 | udc->gadget.dev.parent = dev; | |
1692 | udc->board = *(struct at91_udc_data *) dev->platform_data; | |
1693 | udc->pdev = pdev; | |
bae4bd84 DB |
1694 | udc->enabled = 0; |
1695 | ||
ffd3326b AV |
1696 | udc->udp_baseaddr = ioremap(res->start, res->end - res->start + 1); |
1697 | if (!udc->udp_baseaddr) { | |
1698 | release_mem_region(res->start, res->end - res->start + 1); | |
1699 | return -ENOMEM; | |
1700 | } | |
1701 | ||
1702 | udc_reinit(udc); | |
1703 | ||
bae4bd84 DB |
1704 | /* get interface and function clocks */ |
1705 | udc->iclk = clk_get(dev, "udc_clk"); | |
1706 | udc->fclk = clk_get(dev, "udpck"); | |
1707 | if (IS_ERR(udc->iclk) || IS_ERR(udc->fclk)) { | |
1708 | DBG("clocks missing\n"); | |
29ba4b53 AV |
1709 | retval = -ENODEV; |
1710 | goto fail0; | |
bae4bd84 DB |
1711 | } |
1712 | ||
1713 | retval = device_register(&udc->gadget.dev); | |
1714 | if (retval < 0) | |
1715 | goto fail0; | |
1716 | ||
8b2e7668 DB |
1717 | /* don't do anything until we have both gadget driver and VBUS */ |
1718 | clk_enable(udc->iclk); | |
ffd3326b AV |
1719 | at91_udp_write(udc, AT91_UDP_TXVC, AT91_UDP_TXVC_TXVDIS); |
1720 | at91_udp_write(udc, AT91_UDP_IDR, 0xffffffff); | |
29ba4b53 AV |
1721 | /* Clear all pending interrupts - UDP may be used by bootloader. */ |
1722 | at91_udp_write(udc, AT91_UDP_ICR, 0xffffffff); | |
8b2e7668 | 1723 | clk_disable(udc->iclk); |
bae4bd84 DB |
1724 | |
1725 | /* request UDC and maybe VBUS irqs */ | |
8b2e7668 DB |
1726 | udc->udp_irq = platform_get_irq(pdev, 0); |
1727 | if (request_irq(udc->udp_irq, at91_udc_irq, | |
1728 | IRQF_DISABLED, driver_name, udc)) { | |
1729 | DBG("request irq %d failed\n", udc->udp_irq); | |
bae4bd84 DB |
1730 | retval = -EBUSY; |
1731 | goto fail1; | |
1732 | } | |
1733 | if (udc->board.vbus_pin > 0) { | |
29ba4b53 AV |
1734 | /* |
1735 | * Get the initial state of VBUS - we cannot expect | |
1736 | * a pending interrupt. | |
1737 | */ | |
1738 | udc->vbus = at91_get_gpio_value(udc->board.vbus_pin); | |
8b2e7668 DB |
1739 | if (request_irq(udc->board.vbus_pin, at91_vbus_irq, |
1740 | IRQF_DISABLED, driver_name, udc)) { | |
1741 | DBG("request vbus irq %d failed\n", | |
1742 | udc->board.vbus_pin); | |
1743 | free_irq(udc->udp_irq, udc); | |
bae4bd84 DB |
1744 | retval = -EBUSY; |
1745 | goto fail1; | |
1746 | } | |
1747 | } else { | |
1748 | DBG("no VBUS detection, assuming always-on\n"); | |
1749 | udc->vbus = 1; | |
1750 | } | |
1751 | dev_set_drvdata(dev, udc); | |
8b2e7668 | 1752 | device_init_wakeup(dev, 1); |
bae4bd84 DB |
1753 | create_debug_file(udc); |
1754 | ||
1755 | INFO("%s version %s\n", driver_name, DRIVER_VERSION); | |
1756 | return 0; | |
1757 | ||
1758 | fail1: | |
1759 | device_unregister(&udc->gadget.dev); | |
1760 | fail0: | |
ffd3326b | 1761 | release_mem_region(res->start, res->end - res->start + 1); |
bae4bd84 DB |
1762 | DBG("%s probe failed, %d\n", driver_name, retval); |
1763 | return retval; | |
1764 | } | |
1765 | ||
8b2e7668 | 1766 | static int __devexit at91udc_remove(struct platform_device *pdev) |
bae4bd84 | 1767 | { |
8b2e7668 | 1768 | struct at91_udc *udc = platform_get_drvdata(pdev); |
ffd3326b | 1769 | struct resource *res; |
bae4bd84 DB |
1770 | |
1771 | DBG("remove\n"); | |
1772 | ||
6bea476c DB |
1773 | if (udc->driver) |
1774 | return -EBUSY; | |
bae4bd84 | 1775 | |
6bea476c | 1776 | pullup(udc, 0); |
bae4bd84 | 1777 | |
8b2e7668 | 1778 | device_init_wakeup(&pdev->dev, 0); |
bae4bd84 DB |
1779 | remove_debug_file(udc); |
1780 | if (udc->board.vbus_pin > 0) | |
1781 | free_irq(udc->board.vbus_pin, udc); | |
8b2e7668 | 1782 | free_irq(udc->udp_irq, udc); |
bae4bd84 | 1783 | device_unregister(&udc->gadget.dev); |
ffd3326b AV |
1784 | |
1785 | iounmap(udc->udp_baseaddr); | |
1786 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1787 | release_mem_region(res->start, res->end - res->start + 1); | |
bae4bd84 DB |
1788 | |
1789 | clk_put(udc->iclk); | |
1790 | clk_put(udc->fclk); | |
1791 | ||
1792 | return 0; | |
1793 | } | |
1794 | ||
1795 | #ifdef CONFIG_PM | |
8b2e7668 | 1796 | static int at91udc_suspend(struct platform_device *pdev, pm_message_t mesg) |
bae4bd84 | 1797 | { |
8b2e7668 DB |
1798 | struct at91_udc *udc = platform_get_drvdata(pdev); |
1799 | int wake = udc->driver && device_may_wakeup(&pdev->dev); | |
bae4bd84 | 1800 | |
8b2e7668 DB |
1801 | /* Unless we can act normally to the host (letting it wake us up |
1802 | * whenever it has work for us) force disconnect. Wakeup requires | |
1803 | * PLLB for USB events (signaling for reset, wakeup, or incoming | |
1804 | * tokens) and VBUS irqs (on systems which support them). | |
bae4bd84 | 1805 | */ |
8b2e7668 DB |
1806 | if ((!udc->suspended && udc->addr) |
1807 | || !wake | |
1808 | || at91_suspend_entering_slow_clock()) { | |
bae4bd84 | 1809 | pullup(udc, 0); |
8b2e7668 DB |
1810 | disable_irq_wake(udc->udp_irq); |
1811 | } else | |
1812 | enable_irq_wake(udc->udp_irq); | |
1813 | ||
1814 | if (udc->board.vbus_pin > 0) { | |
1815 | if (wake) | |
1816 | enable_irq_wake(udc->board.vbus_pin); | |
1817 | else | |
1818 | disable_irq_wake(udc->board.vbus_pin); | |
1819 | } | |
bae4bd84 DB |
1820 | return 0; |
1821 | } | |
1822 | ||
8b2e7668 | 1823 | static int at91udc_resume(struct platform_device *pdev) |
bae4bd84 | 1824 | { |
8b2e7668 | 1825 | struct at91_udc *udc = platform_get_drvdata(pdev); |
bae4bd84 DB |
1826 | |
1827 | /* maybe reconnect to host; if so, clocks on */ | |
1828 | pullup(udc, 1); | |
1829 | return 0; | |
1830 | } | |
1831 | #else | |
1832 | #define at91udc_suspend NULL | |
1833 | #define at91udc_resume NULL | |
1834 | #endif | |
1835 | ||
1836 | static struct platform_driver at91_udc = { | |
1837 | .probe = at91udc_probe, | |
1838 | .remove = __devexit_p(at91udc_remove), | |
1839 | .shutdown = at91udc_shutdown, | |
1840 | .suspend = at91udc_suspend, | |
8b2e7668 | 1841 | .resume = at91udc_resume, |
bae4bd84 DB |
1842 | .driver = { |
1843 | .name = (char *) driver_name, | |
1844 | .owner = THIS_MODULE, | |
1845 | }, | |
1846 | }; | |
1847 | ||
1848 | static int __devinit udc_init_module(void) | |
1849 | { | |
1850 | return platform_driver_register(&at91_udc); | |
1851 | } | |
1852 | module_init(udc_init_module); | |
1853 | ||
1854 | static void __devexit udc_exit_module(void) | |
1855 | { | |
1856 | platform_driver_unregister(&at91_udc); | |
1857 | } | |
1858 | module_exit(udc_exit_module); | |
1859 | ||
8b2e7668 | 1860 | MODULE_DESCRIPTION("AT91 udc driver"); |
bae4bd84 DB |
1861 | MODULE_AUTHOR("Thomas Rathbone, David Brownell"); |
1862 | MODULE_LICENSE("GPL"); |