Commit | Line | Data |
---|---|---|
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. | |
bae4bd84 DB |
12 | */ |
13 | ||
f3db6e82 | 14 | #undef VERBOSE_DEBUG |
bae4bd84 DB |
15 | #undef PACKET_TRACE |
16 | ||
bae4bd84 DB |
17 | #include <linux/kernel.h> |
18 | #include <linux/module.h> | |
19 | #include <linux/platform_device.h> | |
20 | #include <linux/delay.h> | |
21 | #include <linux/ioport.h> | |
bae4bd84 | 22 | #include <linux/slab.h> |
bae4bd84 DB |
23 | #include <linux/errno.h> |
24 | #include <linux/init.h> | |
25 | #include <linux/list.h> | |
26 | #include <linux/interrupt.h> | |
27 | #include <linux/proc_fs.h> | |
eed39366 | 28 | #include <linux/prefetch.h> |
bae4bd84 | 29 | #include <linux/clk.h> |
5f848137 | 30 | #include <linux/usb/ch9.h> |
9454a57a | 31 | #include <linux/usb/gadget.h> |
d1494a34 JCPV |
32 | #include <linux/of.h> |
33 | #include <linux/of_gpio.h> | |
bcd2360c | 34 | #include <linux/platform_data/atmel.h> |
bae4bd84 DB |
35 | |
36 | #include <asm/byteorder.h> | |
a09e64fb | 37 | #include <mach/hardware.h> |
bae4bd84 DB |
38 | #include <asm/io.h> |
39 | #include <asm/irq.h> | |
f3db6e82 | 40 | #include <asm/gpio.h> |
bae4bd84 | 41 | |
a09e64fb RK |
42 | #include <mach/cpu.h> |
43 | #include <mach/at91sam9261_matrix.h> | |
4342d647 | 44 | #include <mach/at91_matrix.h> |
bae4bd84 DB |
45 | |
46 | #include "at91_udc.h" | |
47 | ||
48 | ||
49 | /* | |
50 | * This controller is simple and PIO-only. It's used in many AT91-series | |
8b2e7668 DB |
51 | * full speed USB controllers, including the at91rm9200 (arm920T, with MMU), |
52 | * at91sam926x (arm926ejs, with MMU), and several no-mmu versions. | |
bae4bd84 | 53 | * |
d7558148 | 54 | * This driver expects the board has been wired with two GPIOs supporting |
bae4bd84 | 55 | * a VBUS sensing IRQ, and a D+ pullup. (They may be omitted, but the |
8b2e7668 DB |
56 | * testing hasn't covered such cases.) |
57 | * | |
58 | * The pullup is most important (so it's integrated on sam926x parts). It | |
bae4bd84 | 59 | * provides software control over whether the host enumerates the device. |
8b2e7668 | 60 | * |
bae4bd84 DB |
61 | * The VBUS sensing helps during enumeration, and allows both USB clocks |
62 | * (and the transceiver) to stay gated off until they're necessary, saving | |
8b2e7668 DB |
63 | * power. During USB suspend, the 48 MHz clock is gated off in hardware; |
64 | * it may also be gated off by software during some Linux sleep states. | |
bae4bd84 DB |
65 | */ |
66 | ||
8b2e7668 | 67 | #define DRIVER_VERSION "3 May 2006" |
bae4bd84 DB |
68 | |
69 | static const char driver_name [] = "at91_udc"; | |
70 | static const char ep0name[] = "ep0"; | |
71 | ||
4037242c | 72 | #define VBUS_POLL_TIMEOUT msecs_to_jiffies(1000) |
bae4bd84 | 73 | |
4f4c5e36 HH |
74 | #define at91_udp_read(udc, reg) \ |
75 | __raw_readl((udc)->udp_baseaddr + (reg)) | |
76 | #define at91_udp_write(udc, reg, val) \ | |
77 | __raw_writel((val), (udc)->udp_baseaddr + (reg)) | |
bae4bd84 DB |
78 | |
79 | /*-------------------------------------------------------------------------*/ | |
80 | ||
81 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
82 | ||
83 | #include <linux/seq_file.h> | |
84 | ||
85 | static const char debug_filename[] = "driver/udc"; | |
86 | ||
87 | #define FOURBITS "%s%s%s%s" | |
88 | #define EIGHTBITS FOURBITS FOURBITS | |
89 | ||
90 | static void proc_ep_show(struct seq_file *s, struct at91_ep *ep) | |
91 | { | |
92 | static char *types[] = { | |
93 | "control", "out-iso", "out-bulk", "out-int", | |
94 | "BOGUS", "in-iso", "in-bulk", "in-int"}; | |
95 | ||
96 | u32 csr; | |
97 | struct at91_request *req; | |
98 | unsigned long flags; | |
4f4c5e36 | 99 | struct at91_udc *udc = ep->udc; |
bae4bd84 | 100 | |
4f4c5e36 | 101 | spin_lock_irqsave(&udc->lock, flags); |
bae4bd84 DB |
102 | |
103 | csr = __raw_readl(ep->creg); | |
104 | ||
105 | /* NOTE: not collecting per-endpoint irq statistics... */ | |
106 | ||
107 | seq_printf(s, "\n"); | |
108 | seq_printf(s, "%s, maxpacket %d %s%s %s%s\n", | |
109 | ep->ep.name, ep->ep.maxpacket, | |
110 | ep->is_in ? "in" : "out", | |
111 | ep->is_iso ? " iso" : "", | |
112 | ep->is_pingpong | |
113 | ? (ep->fifo_bank ? "pong" : "ping") | |
114 | : "", | |
115 | ep->stopped ? " stopped" : ""); | |
116 | seq_printf(s, "csr %08x rxbytes=%d %s %s %s" EIGHTBITS "\n", | |
117 | csr, | |
118 | (csr & 0x07ff0000) >> 16, | |
119 | (csr & (1 << 15)) ? "enabled" : "disabled", | |
120 | (csr & (1 << 11)) ? "DATA1" : "DATA0", | |
121 | types[(csr & 0x700) >> 8], | |
122 | ||
123 | /* iff type is control then print current direction */ | |
124 | (!(csr & 0x700)) | |
125 | ? ((csr & (1 << 7)) ? " IN" : " OUT") | |
126 | : "", | |
127 | (csr & (1 << 6)) ? " rxdatabk1" : "", | |
128 | (csr & (1 << 5)) ? " forcestall" : "", | |
129 | (csr & (1 << 4)) ? " txpktrdy" : "", | |
130 | ||
131 | (csr & (1 << 3)) ? " stallsent" : "", | |
132 | (csr & (1 << 2)) ? " rxsetup" : "", | |
133 | (csr & (1 << 1)) ? " rxdatabk0" : "", | |
134 | (csr & (1 << 0)) ? " txcomp" : ""); | |
135 | if (list_empty (&ep->queue)) | |
136 | seq_printf(s, "\t(queue empty)\n"); | |
137 | ||
138 | else list_for_each_entry (req, &ep->queue, queue) { | |
139 | unsigned length = req->req.actual; | |
140 | ||
141 | seq_printf(s, "\treq %p len %d/%d buf %p\n", | |
142 | &req->req, length, | |
143 | req->req.length, req->req.buf); | |
144 | } | |
4f4c5e36 | 145 | spin_unlock_irqrestore(&udc->lock, flags); |
bae4bd84 DB |
146 | } |
147 | ||
148 | static void proc_irq_show(struct seq_file *s, const char *label, u32 mask) | |
149 | { | |
150 | int i; | |
151 | ||
152 | seq_printf(s, "%s %04x:%s%s" FOURBITS, label, mask, | |
153 | (mask & (1 << 13)) ? " wakeup" : "", | |
154 | (mask & (1 << 12)) ? " endbusres" : "", | |
155 | ||
156 | (mask & (1 << 11)) ? " sofint" : "", | |
157 | (mask & (1 << 10)) ? " extrsm" : "", | |
158 | (mask & (1 << 9)) ? " rxrsm" : "", | |
159 | (mask & (1 << 8)) ? " rxsusp" : ""); | |
160 | for (i = 0; i < 8; i++) { | |
161 | if (mask & (1 << i)) | |
162 | seq_printf(s, " ep%d", i); | |
163 | } | |
164 | seq_printf(s, "\n"); | |
165 | } | |
166 | ||
167 | static int proc_udc_show(struct seq_file *s, void *unused) | |
168 | { | |
169 | struct at91_udc *udc = s->private; | |
170 | struct at91_ep *ep; | |
171 | u32 tmp; | |
172 | ||
173 | seq_printf(s, "%s: version %s\n", driver_name, DRIVER_VERSION); | |
174 | ||
175 | seq_printf(s, "vbus %s, pullup %s, %s powered%s, gadget %s\n\n", | |
176 | udc->vbus ? "present" : "off", | |
177 | udc->enabled | |
178 | ? (udc->vbus ? "active" : "enabled") | |
179 | : "disabled", | |
180 | udc->selfpowered ? "self" : "VBUS", | |
181 | udc->suspended ? ", suspended" : "", | |
182 | udc->driver ? udc->driver->driver.name : "(none)"); | |
183 | ||
184 | /* don't access registers when interface isn't clocked */ | |
185 | if (!udc->clocked) { | |
186 | seq_printf(s, "(not clocked)\n"); | |
187 | return 0; | |
188 | } | |
189 | ||
ffd3326b | 190 | tmp = at91_udp_read(udc, AT91_UDP_FRM_NUM); |
bae4bd84 DB |
191 | seq_printf(s, "frame %05x:%s%s frame=%d\n", tmp, |
192 | (tmp & AT91_UDP_FRM_OK) ? " ok" : "", | |
193 | (tmp & AT91_UDP_FRM_ERR) ? " err" : "", | |
194 | (tmp & AT91_UDP_NUM)); | |
195 | ||
ffd3326b | 196 | tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT); |
bae4bd84 DB |
197 | seq_printf(s, "glbstate %02x:%s" FOURBITS "\n", tmp, |
198 | (tmp & AT91_UDP_RMWUPE) ? " rmwupe" : "", | |
199 | (tmp & AT91_UDP_RSMINPR) ? " rsminpr" : "", | |
200 | (tmp & AT91_UDP_ESR) ? " esr" : "", | |
201 | (tmp & AT91_UDP_CONFG) ? " confg" : "", | |
202 | (tmp & AT91_UDP_FADDEN) ? " fadden" : ""); | |
203 | ||
ffd3326b | 204 | tmp = at91_udp_read(udc, AT91_UDP_FADDR); |
bae4bd84 DB |
205 | seq_printf(s, "faddr %03x:%s fadd=%d\n", tmp, |
206 | (tmp & AT91_UDP_FEN) ? " fen" : "", | |
207 | (tmp & AT91_UDP_FADD)); | |
208 | ||
ffd3326b AV |
209 | proc_irq_show(s, "imr ", at91_udp_read(udc, AT91_UDP_IMR)); |
210 | proc_irq_show(s, "isr ", at91_udp_read(udc, AT91_UDP_ISR)); | |
bae4bd84 DB |
211 | |
212 | if (udc->enabled && udc->vbus) { | |
213 | proc_ep_show(s, &udc->ep[0]); | |
214 | list_for_each_entry (ep, &udc->gadget.ep_list, ep.ep_list) { | |
5a6506f0 | 215 | if (ep->ep.desc) |
bae4bd84 DB |
216 | proc_ep_show(s, ep); |
217 | } | |
218 | } | |
219 | return 0; | |
220 | } | |
221 | ||
222 | static int proc_udc_open(struct inode *inode, struct file *file) | |
223 | { | |
d9dda78b | 224 | return single_open(file, proc_udc_show, PDE_DATA(inode)); |
bae4bd84 DB |
225 | } |
226 | ||
066202dd | 227 | static const struct file_operations proc_ops = { |
cdefa185 | 228 | .owner = THIS_MODULE, |
bae4bd84 DB |
229 | .open = proc_udc_open, |
230 | .read = seq_read, | |
231 | .llseek = seq_lseek, | |
232 | .release = single_release, | |
233 | }; | |
234 | ||
235 | static void create_debug_file(struct at91_udc *udc) | |
236 | { | |
cdefa185 | 237 | udc->pde = proc_create_data(debug_filename, 0, NULL, &proc_ops, udc); |
bae4bd84 DB |
238 | } |
239 | ||
240 | static void remove_debug_file(struct at91_udc *udc) | |
241 | { | |
242 | if (udc->pde) | |
243 | remove_proc_entry(debug_filename, NULL); | |
244 | } | |
245 | ||
246 | #else | |
247 | ||
248 | static inline void create_debug_file(struct at91_udc *udc) {} | |
249 | static inline void remove_debug_file(struct at91_udc *udc) {} | |
250 | ||
251 | #endif | |
252 | ||
253 | ||
254 | /*-------------------------------------------------------------------------*/ | |
255 | ||
256 | static void done(struct at91_ep *ep, struct at91_request *req, int status) | |
257 | { | |
258 | unsigned stopped = ep->stopped; | |
ffd3326b | 259 | struct at91_udc *udc = ep->udc; |
bae4bd84 DB |
260 | |
261 | list_del_init(&req->queue); | |
262 | if (req->req.status == -EINPROGRESS) | |
263 | req->req.status = status; | |
264 | else | |
265 | status = req->req.status; | |
266 | if (status && status != -ESHUTDOWN) | |
267 | VDBG("%s done %p, status %d\n", ep->ep.name, req, status); | |
268 | ||
269 | ep->stopped = 1; | |
4f4c5e36 | 270 | spin_unlock(&udc->lock); |
bae4bd84 | 271 | req->req.complete(&ep->ep, &req->req); |
4f4c5e36 | 272 | spin_lock(&udc->lock); |
bae4bd84 DB |
273 | ep->stopped = stopped; |
274 | ||
275 | /* ep0 is always ready; other endpoints need a non-empty queue */ | |
276 | if (list_empty(&ep->queue) && ep->int_mask != (1 << 0)) | |
ffd3326b | 277 | at91_udp_write(udc, AT91_UDP_IDR, ep->int_mask); |
bae4bd84 DB |
278 | } |
279 | ||
280 | /*-------------------------------------------------------------------------*/ | |
281 | ||
282 | /* bits indicating OUT fifo has data ready */ | |
283 | #define RX_DATA_READY (AT91_UDP_RX_DATA_BK0 | AT91_UDP_RX_DATA_BK1) | |
284 | ||
285 | /* | |
286 | * Endpoint FIFO CSR bits have a mix of bits, making it unsafe to just write | |
287 | * back most of the value you just read (because of side effects, including | |
288 | * bits that may change after reading and before writing). | |
289 | * | |
290 | * Except when changing a specific bit, always write values which: | |
291 | * - clear SET_FX bits (setting them could change something) | |
292 | * - set CLR_FX bits (clearing them could change something) | |
293 | * | |
294 | * There are also state bits like FORCESTALL, EPEDS, DIR, and EPTYPE | |
295 | * that shouldn't normally be changed. | |
8b2e7668 DB |
296 | * |
297 | * NOTE at91sam9260 docs mention synch between UDPCK and MCK clock domains, | |
298 | * implying a need to wait for one write to complete (test relevant bits) | |
299 | * before starting the next write. This shouldn't be an issue given how | |
300 | * infrequently we write, except maybe for write-then-read idioms. | |
bae4bd84 DB |
301 | */ |
302 | #define SET_FX (AT91_UDP_TXPKTRDY) | |
8b2e7668 DB |
303 | #define CLR_FX (RX_DATA_READY | AT91_UDP_RXSETUP \ |
304 | | AT91_UDP_STALLSENT | AT91_UDP_TXCOMP) | |
bae4bd84 DB |
305 | |
306 | /* pull OUT packet data from the endpoint's fifo */ | |
307 | static int read_fifo (struct at91_ep *ep, struct at91_request *req) | |
308 | { | |
309 | u32 __iomem *creg = ep->creg; | |
310 | u8 __iomem *dreg = ep->creg + (AT91_UDP_FDR(0) - AT91_UDP_CSR(0)); | |
311 | u32 csr; | |
312 | u8 *buf; | |
313 | unsigned int count, bufferspace, is_done; | |
314 | ||
315 | buf = req->req.buf + req->req.actual; | |
316 | bufferspace = req->req.length - req->req.actual; | |
317 | ||
318 | /* | |
319 | * there might be nothing to read if ep_queue() calls us, | |
320 | * or if we already emptied both pingpong buffers | |
321 | */ | |
322 | rescan: | |
323 | csr = __raw_readl(creg); | |
324 | if ((csr & RX_DATA_READY) == 0) | |
325 | return 0; | |
326 | ||
327 | count = (csr & AT91_UDP_RXBYTECNT) >> 16; | |
328 | if (count > ep->ep.maxpacket) | |
329 | count = ep->ep.maxpacket; | |
330 | if (count > bufferspace) { | |
331 | DBG("%s buffer overflow\n", ep->ep.name); | |
332 | req->req.status = -EOVERFLOW; | |
333 | count = bufferspace; | |
334 | } | |
335 | __raw_readsb(dreg, buf, count); | |
336 | ||
337 | /* release and swap pingpong mem bank */ | |
338 | csr |= CLR_FX; | |
339 | if (ep->is_pingpong) { | |
340 | if (ep->fifo_bank == 0) { | |
341 | csr &= ~(SET_FX | AT91_UDP_RX_DATA_BK0); | |
342 | ep->fifo_bank = 1; | |
343 | } else { | |
344 | csr &= ~(SET_FX | AT91_UDP_RX_DATA_BK1); | |
345 | ep->fifo_bank = 0; | |
346 | } | |
347 | } else | |
348 | csr &= ~(SET_FX | AT91_UDP_RX_DATA_BK0); | |
349 | __raw_writel(csr, creg); | |
350 | ||
351 | req->req.actual += count; | |
352 | is_done = (count < ep->ep.maxpacket); | |
353 | if (count == bufferspace) | |
354 | is_done = 1; | |
355 | ||
356 | PACKET("%s %p out/%d%s\n", ep->ep.name, &req->req, count, | |
357 | is_done ? " (done)" : ""); | |
358 | ||
359 | /* | |
360 | * avoid extra trips through IRQ logic for packets already in | |
361 | * the fifo ... maybe preventing an extra (expensive) OUT-NAK | |
362 | */ | |
363 | if (is_done) | |
364 | done(ep, req, 0); | |
365 | else if (ep->is_pingpong) { | |
76225374 HH |
366 | /* |
367 | * One dummy read to delay the code because of a HW glitch: | |
368 | * CSR returns bad RXCOUNT when read too soon after updating | |
369 | * RX_DATA_BK flags. | |
370 | */ | |
371 | csr = __raw_readl(creg); | |
372 | ||
bae4bd84 DB |
373 | bufferspace -= count; |
374 | buf += count; | |
375 | goto rescan; | |
376 | } | |
377 | ||
378 | return is_done; | |
379 | } | |
380 | ||
381 | /* load fifo for an IN packet */ | |
382 | static int write_fifo(struct at91_ep *ep, struct at91_request *req) | |
383 | { | |
384 | u32 __iomem *creg = ep->creg; | |
385 | u32 csr = __raw_readl(creg); | |
386 | u8 __iomem *dreg = ep->creg + (AT91_UDP_FDR(0) - AT91_UDP_CSR(0)); | |
387 | unsigned total, count, is_last; | |
3cf27234 | 388 | u8 *buf; |
bae4bd84 DB |
389 | |
390 | /* | |
391 | * TODO: allow for writing two packets to the fifo ... that'll | |
392 | * reduce the amount of IN-NAKing, but probably won't affect | |
393 | * throughput much. (Unlike preventing OUT-NAKing!) | |
394 | */ | |
395 | ||
396 | /* | |
397 | * If ep_queue() calls us, the queue is empty and possibly in | |
398 | * odd states like TXCOMP not yet cleared (we do it, saving at | |
399 | * least one IRQ) or the fifo not yet being free. Those aren't | |
400 | * issues normally (IRQ handler fast path). | |
401 | */ | |
402 | if (unlikely(csr & (AT91_UDP_TXCOMP | AT91_UDP_TXPKTRDY))) { | |
403 | if (csr & AT91_UDP_TXCOMP) { | |
404 | csr |= CLR_FX; | |
405 | csr &= ~(SET_FX | AT91_UDP_TXCOMP); | |
406 | __raw_writel(csr, creg); | |
407 | csr = __raw_readl(creg); | |
408 | } | |
409 | if (csr & AT91_UDP_TXPKTRDY) | |
410 | return 0; | |
411 | } | |
412 | ||
3cf27234 DB |
413 | buf = req->req.buf + req->req.actual; |
414 | prefetch(buf); | |
bae4bd84 DB |
415 | total = req->req.length - req->req.actual; |
416 | if (ep->ep.maxpacket < total) { | |
417 | count = ep->ep.maxpacket; | |
418 | is_last = 0; | |
419 | } else { | |
420 | count = total; | |
421 | is_last = (count < ep->ep.maxpacket) || !req->req.zero; | |
422 | } | |
423 | ||
424 | /* | |
425 | * Write the packet, maybe it's a ZLP. | |
426 | * | |
427 | * NOTE: incrementing req->actual before we receive the ACK means | |
428 | * gadget driver IN bytecounts can be wrong in fault cases. That's | |
429 | * fixable with PIO drivers like this one (save "count" here, and | |
430 | * do the increment later on TX irq), but not for most DMA hardware. | |
431 | * | |
432 | * So all gadget drivers must accept that potential error. Some | |
433 | * hardware supports precise fifo status reporting, letting them | |
434 | * recover when the actual bytecount matters (e.g. for USB Test | |
435 | * and Measurement Class devices). | |
436 | */ | |
3cf27234 | 437 | __raw_writesb(dreg, buf, count); |
bae4bd84 DB |
438 | csr &= ~SET_FX; |
439 | csr |= CLR_FX | AT91_UDP_TXPKTRDY; | |
440 | __raw_writel(csr, creg); | |
441 | req->req.actual += count; | |
442 | ||
443 | PACKET("%s %p in/%d%s\n", ep->ep.name, &req->req, count, | |
444 | is_last ? " (done)" : ""); | |
445 | if (is_last) | |
446 | done(ep, req, 0); | |
447 | return is_last; | |
448 | } | |
449 | ||
450 | static void nuke(struct at91_ep *ep, int status) | |
451 | { | |
452 | struct at91_request *req; | |
453 | ||
1a8060d9 | 454 | /* terminate any request in the queue */ |
bae4bd84 DB |
455 | ep->stopped = 1; |
456 | if (list_empty(&ep->queue)) | |
457 | return; | |
458 | ||
441b62c1 | 459 | VDBG("%s %s\n", __func__, ep->ep.name); |
bae4bd84 DB |
460 | while (!list_empty(&ep->queue)) { |
461 | req = list_entry(ep->queue.next, struct at91_request, queue); | |
462 | done(ep, req, status); | |
463 | } | |
464 | } | |
465 | ||
466 | /*-------------------------------------------------------------------------*/ | |
467 | ||
8b2e7668 DB |
468 | static int at91_ep_enable(struct usb_ep *_ep, |
469 | const struct usb_endpoint_descriptor *desc) | |
bae4bd84 DB |
470 | { |
471 | struct at91_ep *ep = container_of(_ep, struct at91_ep, ep); | |
162ca3ca | 472 | struct at91_udc *udc; |
bae4bd84 DB |
473 | u16 maxpacket; |
474 | u32 tmp; | |
475 | unsigned long flags; | |
476 | ||
477 | if (!_ep || !ep | |
f3bb8e63 | 478 | || !desc || _ep->name == ep0name |
bae4bd84 | 479 | || desc->bDescriptorType != USB_DT_ENDPOINT |
29cc8897 | 480 | || (maxpacket = usb_endpoint_maxp(desc)) == 0 |
bae4bd84 DB |
481 | || maxpacket > ep->maxpacket) { |
482 | DBG("bad ep or descriptor\n"); | |
483 | return -EINVAL; | |
484 | } | |
485 | ||
162ca3ca | 486 | udc = ep->udc; |
4f4c5e36 | 487 | if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) { |
bae4bd84 DB |
488 | DBG("bogus device state\n"); |
489 | return -ESHUTDOWN; | |
490 | } | |
491 | ||
81c8d8d2 | 492 | tmp = usb_endpoint_type(desc); |
bae4bd84 DB |
493 | switch (tmp) { |
494 | case USB_ENDPOINT_XFER_CONTROL: | |
495 | DBG("only one control endpoint\n"); | |
496 | return -EINVAL; | |
497 | case USB_ENDPOINT_XFER_INT: | |
498 | if (maxpacket > 64) | |
499 | goto bogus_max; | |
500 | break; | |
501 | case USB_ENDPOINT_XFER_BULK: | |
502 | switch (maxpacket) { | |
503 | case 8: | |
504 | case 16: | |
505 | case 32: | |
506 | case 64: | |
507 | goto ok; | |
508 | } | |
509 | bogus_max: | |
510 | DBG("bogus maxpacket %d\n", maxpacket); | |
511 | return -EINVAL; | |
512 | case USB_ENDPOINT_XFER_ISOC: | |
513 | if (!ep->is_pingpong) { | |
514 | DBG("iso requires double buffering\n"); | |
515 | return -EINVAL; | |
516 | } | |
517 | break; | |
518 | } | |
519 | ||
520 | ok: | |
4f4c5e36 | 521 | spin_lock_irqsave(&udc->lock, flags); |
bae4bd84 DB |
522 | |
523 | /* initialize endpoint to match this descriptor */ | |
81c8d8d2 | 524 | ep->is_in = usb_endpoint_dir_in(desc); |
bae4bd84 DB |
525 | ep->is_iso = (tmp == USB_ENDPOINT_XFER_ISOC); |
526 | ep->stopped = 0; | |
527 | if (ep->is_in) | |
528 | tmp |= 0x04; | |
529 | tmp <<= 8; | |
530 | tmp |= AT91_UDP_EPEDS; | |
531 | __raw_writel(tmp, ep->creg); | |
532 | ||
bae4bd84 DB |
533 | ep->ep.maxpacket = maxpacket; |
534 | ||
535 | /* | |
536 | * reset/init endpoint fifo. NOTE: leaves fifo_bank alone, | |
537 | * since endpoint resets don't reset hw pingpong state. | |
538 | */ | |
4f4c5e36 HH |
539 | at91_udp_write(udc, AT91_UDP_RST_EP, ep->int_mask); |
540 | at91_udp_write(udc, AT91_UDP_RST_EP, 0); | |
bae4bd84 | 541 | |
4f4c5e36 | 542 | spin_unlock_irqrestore(&udc->lock, flags); |
bae4bd84 DB |
543 | return 0; |
544 | } | |
545 | ||
546 | static int at91_ep_disable (struct usb_ep * _ep) | |
547 | { | |
548 | struct at91_ep *ep = container_of(_ep, struct at91_ep, ep); | |
ffd3326b | 549 | struct at91_udc *udc = ep->udc; |
bae4bd84 DB |
550 | unsigned long flags; |
551 | ||
552 | if (ep == &ep->udc->ep[0]) | |
553 | return -EINVAL; | |
554 | ||
4f4c5e36 | 555 | spin_lock_irqsave(&udc->lock, flags); |
bae4bd84 DB |
556 | |
557 | nuke(ep, -ESHUTDOWN); | |
558 | ||
559 | /* restore the endpoint's pristine config */ | |
f9c56cdd | 560 | ep->ep.desc = NULL; |
bae4bd84 DB |
561 | ep->ep.maxpacket = ep->maxpacket; |
562 | ||
563 | /* reset fifos and endpoint */ | |
564 | if (ep->udc->clocked) { | |
ffd3326b AV |
565 | at91_udp_write(udc, AT91_UDP_RST_EP, ep->int_mask); |
566 | at91_udp_write(udc, AT91_UDP_RST_EP, 0); | |
bae4bd84 DB |
567 | __raw_writel(0, ep->creg); |
568 | } | |
569 | ||
4f4c5e36 | 570 | spin_unlock_irqrestore(&udc->lock, flags); |
bae4bd84 DB |
571 | return 0; |
572 | } | |
573 | ||
574 | /* | |
575 | * this is a PIO-only driver, so there's nothing | |
576 | * interesting for request or buffer allocation. | |
577 | */ | |
578 | ||
8b2e7668 | 579 | static struct usb_request * |
f3db6e82 | 580 | at91_ep_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) |
bae4bd84 DB |
581 | { |
582 | struct at91_request *req; | |
583 | ||
cd861280 | 584 | req = kzalloc(sizeof (struct at91_request), gfp_flags); |
bae4bd84 DB |
585 | if (!req) |
586 | return NULL; | |
587 | ||
588 | INIT_LIST_HEAD(&req->queue); | |
589 | return &req->req; | |
590 | } | |
591 | ||
592 | static void at91_ep_free_request(struct usb_ep *_ep, struct usb_request *_req) | |
593 | { | |
594 | struct at91_request *req; | |
595 | ||
596 | req = container_of(_req, struct at91_request, req); | |
597 | BUG_ON(!list_empty(&req->queue)); | |
598 | kfree(req); | |
599 | } | |
600 | ||
bae4bd84 DB |
601 | static int at91_ep_queue(struct usb_ep *_ep, |
602 | struct usb_request *_req, gfp_t gfp_flags) | |
603 | { | |
604 | struct at91_request *req; | |
605 | struct at91_ep *ep; | |
4f4c5e36 | 606 | struct at91_udc *udc; |
bae4bd84 DB |
607 | int status; |
608 | unsigned long flags; | |
609 | ||
610 | req = container_of(_req, struct at91_request, req); | |
611 | ep = container_of(_ep, struct at91_ep, ep); | |
612 | ||
613 | if (!_req || !_req->complete | |
614 | || !_req->buf || !list_empty(&req->queue)) { | |
615 | DBG("invalid request\n"); | |
616 | return -EINVAL; | |
617 | } | |
618 | ||
5a6506f0 | 619 | if (!_ep || (!ep->ep.desc && ep->ep.name != ep0name)) { |
bae4bd84 DB |
620 | DBG("invalid ep\n"); |
621 | return -EINVAL; | |
622 | } | |
623 | ||
4f4c5e36 | 624 | udc = ep->udc; |
bae4bd84 | 625 | |
4f4c5e36 | 626 | if (!udc || !udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) { |
bae4bd84 DB |
627 | DBG("invalid device\n"); |
628 | return -EINVAL; | |
629 | } | |
630 | ||
631 | _req->status = -EINPROGRESS; | |
632 | _req->actual = 0; | |
633 | ||
4f4c5e36 | 634 | spin_lock_irqsave(&udc->lock, flags); |
bae4bd84 DB |
635 | |
636 | /* try to kickstart any empty and idle queue */ | |
637 | if (list_empty(&ep->queue) && !ep->stopped) { | |
638 | int is_ep0; | |
639 | ||
640 | /* | |
641 | * If this control request has a non-empty DATA stage, this | |
642 | * will start that stage. It works just like a non-control | |
643 | * request (until the status stage starts, maybe early). | |
644 | * | |
645 | * If the data stage is empty, then this starts a successful | |
646 | * IN/STATUS stage. (Unsuccessful ones use set_halt.) | |
647 | */ | |
648 | is_ep0 = (ep->ep.name == ep0name); | |
649 | if (is_ep0) { | |
650 | u32 tmp; | |
651 | ||
4f4c5e36 | 652 | if (!udc->req_pending) { |
bae4bd84 DB |
653 | status = -EINVAL; |
654 | goto done; | |
655 | } | |
656 | ||
657 | /* | |
658 | * defer changing CONFG until after the gadget driver | |
659 | * reconfigures the endpoints. | |
660 | */ | |
4f4c5e36 HH |
661 | if (udc->wait_for_config_ack) { |
662 | tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT); | |
bae4bd84 DB |
663 | tmp ^= AT91_UDP_CONFG; |
664 | VDBG("toggle config\n"); | |
4f4c5e36 | 665 | at91_udp_write(udc, AT91_UDP_GLB_STAT, tmp); |
bae4bd84 DB |
666 | } |
667 | if (req->req.length == 0) { | |
668 | ep0_in_status: | |
669 | PACKET("ep0 in/status\n"); | |
670 | status = 0; | |
671 | tmp = __raw_readl(ep->creg); | |
672 | tmp &= ~SET_FX; | |
673 | tmp |= CLR_FX | AT91_UDP_TXPKTRDY; | |
674 | __raw_writel(tmp, ep->creg); | |
4f4c5e36 | 675 | udc->req_pending = 0; |
bae4bd84 DB |
676 | goto done; |
677 | } | |
678 | } | |
679 | ||
680 | if (ep->is_in) | |
681 | status = write_fifo(ep, req); | |
682 | else { | |
683 | status = read_fifo(ep, req); | |
684 | ||
685 | /* IN/STATUS stage is otherwise triggered by irq */ | |
686 | if (status && is_ep0) | |
687 | goto ep0_in_status; | |
688 | } | |
689 | } else | |
690 | status = 0; | |
691 | ||
692 | if (req && !status) { | |
693 | list_add_tail (&req->queue, &ep->queue); | |
4f4c5e36 | 694 | at91_udp_write(udc, AT91_UDP_IER, ep->int_mask); |
bae4bd84 DB |
695 | } |
696 | done: | |
4f4c5e36 | 697 | spin_unlock_irqrestore(&udc->lock, flags); |
bae4bd84 DB |
698 | return (status < 0) ? status : 0; |
699 | } | |
700 | ||
701 | static int at91_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) | |
702 | { | |
4f4c5e36 | 703 | struct at91_ep *ep; |
bae4bd84 | 704 | struct at91_request *req; |
4f4c5e36 HH |
705 | unsigned long flags; |
706 | struct at91_udc *udc; | |
bae4bd84 DB |
707 | |
708 | ep = container_of(_ep, struct at91_ep, ep); | |
709 | if (!_ep || ep->ep.name == ep0name) | |
710 | return -EINVAL; | |
711 | ||
4f4c5e36 HH |
712 | udc = ep->udc; |
713 | ||
714 | spin_lock_irqsave(&udc->lock, flags); | |
715 | ||
bae4bd84 DB |
716 | /* make sure it's actually queued on this endpoint */ |
717 | list_for_each_entry (req, &ep->queue, queue) { | |
718 | if (&req->req == _req) | |
719 | break; | |
720 | } | |
4f4c5e36 HH |
721 | if (&req->req != _req) { |
722 | spin_unlock_irqrestore(&udc->lock, flags); | |
bae4bd84 | 723 | return -EINVAL; |
4f4c5e36 | 724 | } |
bae4bd84 DB |
725 | |
726 | done(ep, req, -ECONNRESET); | |
4f4c5e36 | 727 | spin_unlock_irqrestore(&udc->lock, flags); |
bae4bd84 DB |
728 | return 0; |
729 | } | |
730 | ||
731 | static int at91_ep_set_halt(struct usb_ep *_ep, int value) | |
732 | { | |
733 | struct at91_ep *ep = container_of(_ep, struct at91_ep, ep); | |
ffd3326b | 734 | struct at91_udc *udc = ep->udc; |
bae4bd84 DB |
735 | u32 __iomem *creg; |
736 | u32 csr; | |
737 | unsigned long flags; | |
738 | int status = 0; | |
739 | ||
740 | if (!_ep || ep->is_iso || !ep->udc->clocked) | |
741 | return -EINVAL; | |
742 | ||
743 | creg = ep->creg; | |
4f4c5e36 | 744 | spin_lock_irqsave(&udc->lock, flags); |
bae4bd84 DB |
745 | |
746 | csr = __raw_readl(creg); | |
747 | ||
748 | /* | |
749 | * fail with still-busy IN endpoints, ensuring correct sequencing | |
750 | * of data tx then stall. note that the fifo rx bytecount isn't | |
751 | * completely accurate as a tx bytecount. | |
752 | */ | |
753 | if (ep->is_in && (!list_empty(&ep->queue) || (csr >> 16) != 0)) | |
754 | status = -EAGAIN; | |
755 | else { | |
756 | csr |= CLR_FX; | |
757 | csr &= ~SET_FX; | |
758 | if (value) { | |
759 | csr |= AT91_UDP_FORCESTALL; | |
760 | VDBG("halt %s\n", ep->ep.name); | |
761 | } else { | |
ffd3326b AV |
762 | at91_udp_write(udc, AT91_UDP_RST_EP, ep->int_mask); |
763 | at91_udp_write(udc, AT91_UDP_RST_EP, 0); | |
bae4bd84 DB |
764 | csr &= ~AT91_UDP_FORCESTALL; |
765 | } | |
766 | __raw_writel(csr, creg); | |
767 | } | |
768 | ||
4f4c5e36 | 769 | spin_unlock_irqrestore(&udc->lock, flags); |
bae4bd84 DB |
770 | return status; |
771 | } | |
772 | ||
398acce7 | 773 | static const struct usb_ep_ops at91_ep_ops = { |
bae4bd84 DB |
774 | .enable = at91_ep_enable, |
775 | .disable = at91_ep_disable, | |
776 | .alloc_request = at91_ep_alloc_request, | |
777 | .free_request = at91_ep_free_request, | |
bae4bd84 DB |
778 | .queue = at91_ep_queue, |
779 | .dequeue = at91_ep_dequeue, | |
780 | .set_halt = at91_ep_set_halt, | |
1a8060d9 | 781 | /* there's only imprecise fifo status reporting */ |
bae4bd84 DB |
782 | }; |
783 | ||
784 | /*-------------------------------------------------------------------------*/ | |
785 | ||
786 | static int at91_get_frame(struct usb_gadget *gadget) | |
787 | { | |
ffd3326b AV |
788 | struct at91_udc *udc = to_udc(gadget); |
789 | ||
bae4bd84 DB |
790 | if (!to_udc(gadget)->clocked) |
791 | return -EINVAL; | |
ffd3326b | 792 | return at91_udp_read(udc, AT91_UDP_FRM_NUM) & AT91_UDP_NUM; |
bae4bd84 DB |
793 | } |
794 | ||
795 | static int at91_wakeup(struct usb_gadget *gadget) | |
796 | { | |
797 | struct at91_udc *udc = to_udc(gadget); | |
798 | u32 glbstate; | |
799 | int status = -EINVAL; | |
800 | unsigned long flags; | |
801 | ||
441b62c1 | 802 | DBG("%s\n", __func__ ); |
4f4c5e36 | 803 | spin_lock_irqsave(&udc->lock, flags); |
bae4bd84 DB |
804 | |
805 | if (!udc->clocked || !udc->suspended) | |
806 | goto done; | |
807 | ||
808 | /* NOTE: some "early versions" handle ESR differently ... */ | |
809 | ||
ffd3326b | 810 | glbstate = at91_udp_read(udc, AT91_UDP_GLB_STAT); |
bae4bd84 DB |
811 | if (!(glbstate & AT91_UDP_ESR)) |
812 | goto done; | |
813 | glbstate |= AT91_UDP_ESR; | |
ffd3326b | 814 | at91_udp_write(udc, AT91_UDP_GLB_STAT, glbstate); |
bae4bd84 DB |
815 | |
816 | done: | |
4f4c5e36 | 817 | spin_unlock_irqrestore(&udc->lock, flags); |
bae4bd84 DB |
818 | return status; |
819 | } | |
820 | ||
25985edc | 821 | /* reinit == restore initial software state */ |
bae4bd84 DB |
822 | static void udc_reinit(struct at91_udc *udc) |
823 | { | |
824 | u32 i; | |
825 | ||
826 | INIT_LIST_HEAD(&udc->gadget.ep_list); | |
827 | INIT_LIST_HEAD(&udc->gadget.ep0->ep_list); | |
828 | ||
829 | for (i = 0; i < NUM_ENDPOINTS; i++) { | |
830 | struct at91_ep *ep = &udc->ep[i]; | |
831 | ||
832 | if (i != 0) | |
833 | list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list); | |
5a6506f0 | 834 | ep->ep.desc = NULL; |
bae4bd84 DB |
835 | ep->stopped = 0; |
836 | ep->fifo_bank = 0; | |
837 | ep->ep.maxpacket = ep->maxpacket; | |
ffd3326b | 838 | ep->creg = (void __iomem *) udc->udp_baseaddr + AT91_UDP_CSR(i); |
1a8060d9 | 839 | /* initialize one queue per endpoint */ |
bae4bd84 DB |
840 | INIT_LIST_HEAD(&ep->queue); |
841 | } | |
842 | } | |
843 | ||
844 | static void stop_activity(struct at91_udc *udc) | |
845 | { | |
846 | struct usb_gadget_driver *driver = udc->driver; | |
847 | int i; | |
848 | ||
849 | if (udc->gadget.speed == USB_SPEED_UNKNOWN) | |
850 | driver = NULL; | |
851 | udc->gadget.speed = USB_SPEED_UNKNOWN; | |
8b2e7668 | 852 | udc->suspended = 0; |
bae4bd84 DB |
853 | |
854 | for (i = 0; i < NUM_ENDPOINTS; i++) { | |
855 | struct at91_ep *ep = &udc->ep[i]; | |
856 | ep->stopped = 1; | |
857 | nuke(ep, -ESHUTDOWN); | |
858 | } | |
4f4c5e36 HH |
859 | if (driver) { |
860 | spin_unlock(&udc->lock); | |
bae4bd84 | 861 | driver->disconnect(&udc->gadget); |
4f4c5e36 HH |
862 | spin_lock(&udc->lock); |
863 | } | |
bae4bd84 DB |
864 | |
865 | udc_reinit(udc); | |
866 | } | |
867 | ||
868 | static void clk_on(struct at91_udc *udc) | |
869 | { | |
870 | if (udc->clocked) | |
871 | return; | |
872 | udc->clocked = 1; | |
c0aefc75 BB |
873 | |
874 | if (IS_ENABLED(CONFIG_COMMON_CLK)) { | |
875 | clk_set_rate(udc->uclk, 48000000); | |
876 | clk_prepare_enable(udc->uclk); | |
877 | } | |
76280832 BB |
878 | clk_prepare_enable(udc->iclk); |
879 | clk_prepare_enable(udc->fclk); | |
bae4bd84 DB |
880 | } |
881 | ||
882 | static void clk_off(struct at91_udc *udc) | |
883 | { | |
884 | if (!udc->clocked) | |
885 | return; | |
886 | udc->clocked = 0; | |
887 | udc->gadget.speed = USB_SPEED_UNKNOWN; | |
76280832 BB |
888 | clk_disable_unprepare(udc->fclk); |
889 | clk_disable_unprepare(udc->iclk); | |
c0aefc75 BB |
890 | if (IS_ENABLED(CONFIG_COMMON_CLK)) |
891 | clk_disable_unprepare(udc->uclk); | |
bae4bd84 DB |
892 | } |
893 | ||
894 | /* | |
895 | * activate/deactivate link with host; minimize power usage for | |
896 | * inactive links by cutting clocks and transceiver power. | |
897 | */ | |
898 | static void pullup(struct at91_udc *udc, int is_on) | |
899 | { | |
f3db6e82 DB |
900 | int active = !udc->board.pullup_active_low; |
901 | ||
bae4bd84 DB |
902 | if (!udc->enabled || !udc->vbus) |
903 | is_on = 0; | |
904 | DBG("%sactive\n", is_on ? "" : "in"); | |
ffd3326b | 905 | |
bae4bd84 DB |
906 | if (is_on) { |
907 | clk_on(udc); | |
08cbc706 | 908 | at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_RXRSM); |
ffd3326b | 909 | at91_udp_write(udc, AT91_UDP_TXVC, 0); |
29ba4b53 | 910 | if (cpu_is_at91rm9200()) |
f3db6e82 | 911 | gpio_set_value(udc->board.pullup_pin, active); |
61352667 | 912 | else if (cpu_is_at91sam9260() || cpu_is_at91sam9263() || cpu_is_at91sam9g20()) { |
29ba4b53 AV |
913 | u32 txvc = at91_udp_read(udc, AT91_UDP_TXVC); |
914 | ||
915 | txvc |= AT91_UDP_TXVC_PUON; | |
916 | at91_udp_write(udc, AT91_UDP_TXVC, txvc); | |
23f6d914 | 917 | } else if (cpu_is_at91sam9261() || cpu_is_at91sam9g10()) { |
29ba4b53 AV |
918 | u32 usbpucr; |
919 | ||
4342d647 | 920 | usbpucr = at91_matrix_read(AT91_MATRIX_USBPUCR); |
29ba4b53 | 921 | usbpucr |= AT91_MATRIX_USBPUCR_PUON; |
4342d647 | 922 | at91_matrix_write(AT91_MATRIX_USBPUCR, usbpucr); |
29ba4b53 | 923 | } |
ffd3326b | 924 | } else { |
bae4bd84 | 925 | stop_activity(udc); |
08cbc706 | 926 | at91_udp_write(udc, AT91_UDP_IDR, AT91_UDP_RXRSM); |
ffd3326b | 927 | at91_udp_write(udc, AT91_UDP_TXVC, AT91_UDP_TXVC_TXVDIS); |
29ba4b53 | 928 | if (cpu_is_at91rm9200()) |
f3db6e82 | 929 | gpio_set_value(udc->board.pullup_pin, !active); |
61352667 | 930 | else if (cpu_is_at91sam9260() || cpu_is_at91sam9263() || cpu_is_at91sam9g20()) { |
29ba4b53 AV |
931 | u32 txvc = at91_udp_read(udc, AT91_UDP_TXVC); |
932 | ||
933 | txvc &= ~AT91_UDP_TXVC_PUON; | |
934 | at91_udp_write(udc, AT91_UDP_TXVC, txvc); | |
23f6d914 | 935 | } else if (cpu_is_at91sam9261() || cpu_is_at91sam9g10()) { |
29ba4b53 AV |
936 | u32 usbpucr; |
937 | ||
4342d647 | 938 | usbpucr = at91_matrix_read(AT91_MATRIX_USBPUCR); |
29ba4b53 | 939 | usbpucr &= ~AT91_MATRIX_USBPUCR_PUON; |
4342d647 | 940 | at91_matrix_write(AT91_MATRIX_USBPUCR, usbpucr); |
29ba4b53 | 941 | } |
bae4bd84 | 942 | clk_off(udc); |
bae4bd84 DB |
943 | } |
944 | } | |
945 | ||
946 | /* vbus is here! turn everything on that's ready */ | |
947 | static int at91_vbus_session(struct usb_gadget *gadget, int is_active) | |
948 | { | |
949 | struct at91_udc *udc = to_udc(gadget); | |
950 | unsigned long flags; | |
951 | ||
1a8060d9 | 952 | /* VDBG("vbus %s\n", is_active ? "on" : "off"); */ |
4f4c5e36 | 953 | spin_lock_irqsave(&udc->lock, flags); |
bae4bd84 | 954 | udc->vbus = (is_active != 0); |
bfb7fb79 WK |
955 | if (udc->driver) |
956 | pullup(udc, is_active); | |
957 | else | |
958 | pullup(udc, 0); | |
4f4c5e36 | 959 | spin_unlock_irqrestore(&udc->lock, flags); |
bae4bd84 DB |
960 | return 0; |
961 | } | |
962 | ||
963 | static int at91_pullup(struct usb_gadget *gadget, int is_on) | |
964 | { | |
965 | struct at91_udc *udc = to_udc(gadget); | |
966 | unsigned long flags; | |
967 | ||
4f4c5e36 | 968 | spin_lock_irqsave(&udc->lock, flags); |
bae4bd84 DB |
969 | udc->enabled = is_on = !!is_on; |
970 | pullup(udc, is_on); | |
4f4c5e36 | 971 | spin_unlock_irqrestore(&udc->lock, flags); |
bae4bd84 DB |
972 | return 0; |
973 | } | |
974 | ||
975 | static int at91_set_selfpowered(struct usb_gadget *gadget, int is_on) | |
976 | { | |
977 | struct at91_udc *udc = to_udc(gadget); | |
978 | unsigned long flags; | |
979 | ||
4f4c5e36 | 980 | spin_lock_irqsave(&udc->lock, flags); |
bae4bd84 | 981 | udc->selfpowered = (is_on != 0); |
4f4c5e36 | 982 | spin_unlock_irqrestore(&udc->lock, flags); |
bae4bd84 DB |
983 | return 0; |
984 | } | |
985 | ||
f3d8bf34 SAS |
986 | static int at91_start(struct usb_gadget *gadget, |
987 | struct usb_gadget_driver *driver); | |
988 | static int at91_stop(struct usb_gadget *gadget, | |
989 | struct usb_gadget_driver *driver); | |
bae4bd84 DB |
990 | static const struct usb_gadget_ops at91_udc_ops = { |
991 | .get_frame = at91_get_frame, | |
992 | .wakeup = at91_wakeup, | |
993 | .set_selfpowered = at91_set_selfpowered, | |
994 | .vbus_session = at91_vbus_session, | |
995 | .pullup = at91_pullup, | |
f3d8bf34 SAS |
996 | .udc_start = at91_start, |
997 | .udc_stop = at91_stop, | |
bae4bd84 DB |
998 | |
999 | /* | |
1000 | * VBUS-powered devices may also also want to support bigger | |
1001 | * power budgets after an appropriate SET_CONFIGURATION. | |
1002 | */ | |
1a8060d9 | 1003 | /* .vbus_power = at91_vbus_power, */ |
bae4bd84 DB |
1004 | }; |
1005 | ||
1006 | /*-------------------------------------------------------------------------*/ | |
1007 | ||
1008 | static int handle_ep(struct at91_ep *ep) | |
1009 | { | |
1010 | struct at91_request *req; | |
1011 | u32 __iomem *creg = ep->creg; | |
1012 | u32 csr = __raw_readl(creg); | |
1013 | ||
1014 | if (!list_empty(&ep->queue)) | |
1015 | req = list_entry(ep->queue.next, | |
1016 | struct at91_request, queue); | |
1017 | else | |
1018 | req = NULL; | |
1019 | ||
1020 | if (ep->is_in) { | |
1021 | if (csr & (AT91_UDP_STALLSENT | AT91_UDP_TXCOMP)) { | |
1022 | csr |= CLR_FX; | |
1023 | csr &= ~(SET_FX | AT91_UDP_STALLSENT | AT91_UDP_TXCOMP); | |
1024 | __raw_writel(csr, creg); | |
1025 | } | |
1026 | if (req) | |
1027 | return write_fifo(ep, req); | |
1028 | ||
1029 | } else { | |
1030 | if (csr & AT91_UDP_STALLSENT) { | |
1031 | /* STALLSENT bit == ISOERR */ | |
1032 | if (ep->is_iso && req) | |
1033 | req->req.status = -EILSEQ; | |
1034 | csr |= CLR_FX; | |
1035 | csr &= ~(SET_FX | AT91_UDP_STALLSENT); | |
1036 | __raw_writel(csr, creg); | |
1037 | csr = __raw_readl(creg); | |
1038 | } | |
1039 | if (req && (csr & RX_DATA_READY)) | |
1040 | return read_fifo(ep, req); | |
1041 | } | |
1042 | return 0; | |
1043 | } | |
1044 | ||
1045 | union setup { | |
1046 | u8 raw[8]; | |
1047 | struct usb_ctrlrequest r; | |
1048 | }; | |
1049 | ||
1050 | static void handle_setup(struct at91_udc *udc, struct at91_ep *ep, u32 csr) | |
1051 | { | |
1052 | u32 __iomem *creg = ep->creg; | |
1053 | u8 __iomem *dreg = ep->creg + (AT91_UDP_FDR(0) - AT91_UDP_CSR(0)); | |
1054 | unsigned rxcount, i = 0; | |
1055 | u32 tmp; | |
1056 | union setup pkt; | |
1057 | int status = 0; | |
1058 | ||
1059 | /* read and ack SETUP; hard-fail for bogus packets */ | |
1060 | rxcount = (csr & AT91_UDP_RXBYTECNT) >> 16; | |
1061 | if (likely(rxcount == 8)) { | |
1062 | while (rxcount--) | |
1063 | pkt.raw[i++] = __raw_readb(dreg); | |
1064 | if (pkt.r.bRequestType & USB_DIR_IN) { | |
1065 | csr |= AT91_UDP_DIR; | |
1066 | ep->is_in = 1; | |
1067 | } else { | |
1068 | csr &= ~AT91_UDP_DIR; | |
1069 | ep->is_in = 0; | |
1070 | } | |
1071 | } else { | |
1a8060d9 | 1072 | /* REVISIT this happens sometimes under load; why?? */ |
bae4bd84 DB |
1073 | ERR("SETUP len %d, csr %08x\n", rxcount, csr); |
1074 | status = -EINVAL; | |
1075 | } | |
1076 | csr |= CLR_FX; | |
1077 | csr &= ~(SET_FX | AT91_UDP_RXSETUP); | |
1078 | __raw_writel(csr, creg); | |
1079 | udc->wait_for_addr_ack = 0; | |
1080 | udc->wait_for_config_ack = 0; | |
1081 | ep->stopped = 0; | |
1082 | if (unlikely(status != 0)) | |
1083 | goto stall; | |
1084 | ||
1085 | #define w_index le16_to_cpu(pkt.r.wIndex) | |
1086 | #define w_value le16_to_cpu(pkt.r.wValue) | |
1087 | #define w_length le16_to_cpu(pkt.r.wLength) | |
1088 | ||
1089 | VDBG("SETUP %02x.%02x v%04x i%04x l%04x\n", | |
1090 | pkt.r.bRequestType, pkt.r.bRequest, | |
1091 | w_value, w_index, w_length); | |
1092 | ||
1093 | /* | |
1094 | * A few standard requests get handled here, ones that touch | |
1095 | * hardware ... notably for device and endpoint features. | |
1096 | */ | |
1097 | udc->req_pending = 1; | |
1098 | csr = __raw_readl(creg); | |
1099 | csr |= CLR_FX; | |
1100 | csr &= ~SET_FX; | |
1101 | switch ((pkt.r.bRequestType << 8) | pkt.r.bRequest) { | |
1102 | ||
1103 | case ((USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8) | |
1104 | | USB_REQ_SET_ADDRESS: | |
1105 | __raw_writel(csr | AT91_UDP_TXPKTRDY, creg); | |
1106 | udc->addr = w_value; | |
1107 | udc->wait_for_addr_ack = 1; | |
1108 | udc->req_pending = 0; | |
1109 | /* FADDR is set later, when we ack host STATUS */ | |
1110 | return; | |
1111 | ||
1112 | case ((USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8) | |
1113 | | USB_REQ_SET_CONFIGURATION: | |
ffd3326b | 1114 | tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT) & AT91_UDP_CONFG; |
bae4bd84 DB |
1115 | if (pkt.r.wValue) |
1116 | udc->wait_for_config_ack = (tmp == 0); | |
1117 | else | |
1118 | udc->wait_for_config_ack = (tmp != 0); | |
1119 | if (udc->wait_for_config_ack) | |
1120 | VDBG("wait for config\n"); | |
1121 | /* CONFG is toggled later, if gadget driver succeeds */ | |
1122 | break; | |
1123 | ||
1124 | /* | |
1125 | * Hosts may set or clear remote wakeup status, and | |
1126 | * devices may report they're VBUS powered. | |
1127 | */ | |
1128 | case ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8) | |
1129 | | USB_REQ_GET_STATUS: | |
1130 | tmp = (udc->selfpowered << USB_DEVICE_SELF_POWERED); | |
ffd3326b | 1131 | if (at91_udp_read(udc, AT91_UDP_GLB_STAT) & AT91_UDP_ESR) |
bae4bd84 DB |
1132 | tmp |= (1 << USB_DEVICE_REMOTE_WAKEUP); |
1133 | PACKET("get device status\n"); | |
1134 | __raw_writeb(tmp, dreg); | |
1135 | __raw_writeb(0, dreg); | |
1136 | goto write_in; | |
1137 | /* then STATUS starts later, automatically */ | |
1138 | case ((USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8) | |
1139 | | USB_REQ_SET_FEATURE: | |
1140 | if (w_value != USB_DEVICE_REMOTE_WAKEUP) | |
1141 | goto stall; | |
ffd3326b | 1142 | tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT); |
bae4bd84 | 1143 | tmp |= AT91_UDP_ESR; |
ffd3326b | 1144 | at91_udp_write(udc, AT91_UDP_GLB_STAT, tmp); |
bae4bd84 DB |
1145 | goto succeed; |
1146 | case ((USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8) | |
1147 | | USB_REQ_CLEAR_FEATURE: | |
1148 | if (w_value != USB_DEVICE_REMOTE_WAKEUP) | |
1149 | goto stall; | |
ffd3326b | 1150 | tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT); |
bae4bd84 | 1151 | tmp &= ~AT91_UDP_ESR; |
ffd3326b | 1152 | at91_udp_write(udc, AT91_UDP_GLB_STAT, tmp); |
bae4bd84 DB |
1153 | goto succeed; |
1154 | ||
1155 | /* | |
1156 | * Interfaces have no feature settings; this is pretty useless. | |
1157 | * we won't even insist the interface exists... | |
1158 | */ | |
1159 | case ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE) << 8) | |
1160 | | USB_REQ_GET_STATUS: | |
1161 | PACKET("get interface status\n"); | |
1162 | __raw_writeb(0, dreg); | |
1163 | __raw_writeb(0, dreg); | |
1164 | goto write_in; | |
1165 | /* then STATUS starts later, automatically */ | |
1166 | case ((USB_TYPE_STANDARD|USB_RECIP_INTERFACE) << 8) | |
1167 | | USB_REQ_SET_FEATURE: | |
1168 | case ((USB_TYPE_STANDARD|USB_RECIP_INTERFACE) << 8) | |
1169 | | USB_REQ_CLEAR_FEATURE: | |
1170 | goto stall; | |
1171 | ||
1172 | /* | |
1173 | * Hosts may clear bulk/intr endpoint halt after the gadget | |
1174 | * driver sets it (not widely used); or set it (for testing) | |
1175 | */ | |
1176 | case ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_ENDPOINT) << 8) | |
1177 | | USB_REQ_GET_STATUS: | |
1178 | tmp = w_index & USB_ENDPOINT_NUMBER_MASK; | |
1179 | ep = &udc->ep[tmp]; | |
5a6506f0 | 1180 | if (tmp >= NUM_ENDPOINTS || (tmp && !ep->ep.desc)) |
bae4bd84 DB |
1181 | goto stall; |
1182 | ||
1183 | if (tmp) { | |
1184 | if ((w_index & USB_DIR_IN)) { | |
1185 | if (!ep->is_in) | |
1186 | goto stall; | |
1187 | } else if (ep->is_in) | |
1188 | goto stall; | |
1189 | } | |
1190 | PACKET("get %s status\n", ep->ep.name); | |
1191 | if (__raw_readl(ep->creg) & AT91_UDP_FORCESTALL) | |
1192 | tmp = (1 << USB_ENDPOINT_HALT); | |
1193 | else | |
1194 | tmp = 0; | |
1195 | __raw_writeb(tmp, dreg); | |
1196 | __raw_writeb(0, dreg); | |
1197 | goto write_in; | |
1198 | /* then STATUS starts later, automatically */ | |
1199 | case ((USB_TYPE_STANDARD|USB_RECIP_ENDPOINT) << 8) | |
1200 | | USB_REQ_SET_FEATURE: | |
1201 | tmp = w_index & USB_ENDPOINT_NUMBER_MASK; | |
1202 | ep = &udc->ep[tmp]; | |
1440e096 | 1203 | if (w_value != USB_ENDPOINT_HALT || tmp >= NUM_ENDPOINTS) |
bae4bd84 | 1204 | goto stall; |
5a6506f0 | 1205 | if (!ep->ep.desc || ep->is_iso) |
bae4bd84 DB |
1206 | goto stall; |
1207 | if ((w_index & USB_DIR_IN)) { | |
1208 | if (!ep->is_in) | |
1209 | goto stall; | |
1210 | } else if (ep->is_in) | |
1211 | goto stall; | |
1212 | ||
1213 | tmp = __raw_readl(ep->creg); | |
1214 | tmp &= ~SET_FX; | |
1215 | tmp |= CLR_FX | AT91_UDP_FORCESTALL; | |
1216 | __raw_writel(tmp, ep->creg); | |
1217 | goto succeed; | |
1218 | case ((USB_TYPE_STANDARD|USB_RECIP_ENDPOINT) << 8) | |
1219 | | USB_REQ_CLEAR_FEATURE: | |
1220 | tmp = w_index & USB_ENDPOINT_NUMBER_MASK; | |
1221 | ep = &udc->ep[tmp]; | |
1440e096 | 1222 | if (w_value != USB_ENDPOINT_HALT || tmp >= NUM_ENDPOINTS) |
bae4bd84 DB |
1223 | goto stall; |
1224 | if (tmp == 0) | |
1225 | goto succeed; | |
5a6506f0 | 1226 | if (!ep->ep.desc || ep->is_iso) |
bae4bd84 DB |
1227 | goto stall; |
1228 | if ((w_index & USB_DIR_IN)) { | |
1229 | if (!ep->is_in) | |
1230 | goto stall; | |
1231 | } else if (ep->is_in) | |
1232 | goto stall; | |
1233 | ||
ffd3326b AV |
1234 | at91_udp_write(udc, AT91_UDP_RST_EP, ep->int_mask); |
1235 | at91_udp_write(udc, AT91_UDP_RST_EP, 0); | |
bae4bd84 DB |
1236 | tmp = __raw_readl(ep->creg); |
1237 | tmp |= CLR_FX; | |
1238 | tmp &= ~(SET_FX | AT91_UDP_FORCESTALL); | |
1239 | __raw_writel(tmp, ep->creg); | |
1240 | if (!list_empty(&ep->queue)) | |
1241 | handle_ep(ep); | |
1242 | goto succeed; | |
1243 | } | |
1244 | ||
1245 | #undef w_value | |
1246 | #undef w_index | |
1247 | #undef w_length | |
1248 | ||
1249 | /* pass request up to the gadget driver */ | |
4f4c5e36 HH |
1250 | if (udc->driver) { |
1251 | spin_unlock(&udc->lock); | |
bfb7fb79 | 1252 | status = udc->driver->setup(&udc->gadget, &pkt.r); |
4f4c5e36 HH |
1253 | spin_lock(&udc->lock); |
1254 | } | |
bfb7fb79 WK |
1255 | else |
1256 | status = -ENODEV; | |
bae4bd84 DB |
1257 | if (status < 0) { |
1258 | stall: | |
1259 | VDBG("req %02x.%02x protocol STALL; stat %d\n", | |
1260 | pkt.r.bRequestType, pkt.r.bRequest, status); | |
1261 | csr |= AT91_UDP_FORCESTALL; | |
1262 | __raw_writel(csr, creg); | |
1263 | udc->req_pending = 0; | |
1264 | } | |
1265 | return; | |
1266 | ||
1267 | succeed: | |
1268 | /* immediate successful (IN) STATUS after zero length DATA */ | |
1269 | PACKET("ep0 in/status\n"); | |
1270 | write_in: | |
1271 | csr |= AT91_UDP_TXPKTRDY; | |
1272 | __raw_writel(csr, creg); | |
1273 | udc->req_pending = 0; | |
bae4bd84 DB |
1274 | } |
1275 | ||
1276 | static void handle_ep0(struct at91_udc *udc) | |
1277 | { | |
1278 | struct at91_ep *ep0 = &udc->ep[0]; | |
1279 | u32 __iomem *creg = ep0->creg; | |
1280 | u32 csr = __raw_readl(creg); | |
1281 | struct at91_request *req; | |
1282 | ||
1283 | if (unlikely(csr & AT91_UDP_STALLSENT)) { | |
1284 | nuke(ep0, -EPROTO); | |
1285 | udc->req_pending = 0; | |
1286 | csr |= CLR_FX; | |
1287 | csr &= ~(SET_FX | AT91_UDP_STALLSENT | AT91_UDP_FORCESTALL); | |
1288 | __raw_writel(csr, creg); | |
1289 | VDBG("ep0 stalled\n"); | |
1290 | csr = __raw_readl(creg); | |
1291 | } | |
1292 | if (csr & AT91_UDP_RXSETUP) { | |
1293 | nuke(ep0, 0); | |
1294 | udc->req_pending = 0; | |
1295 | handle_setup(udc, ep0, csr); | |
1296 | return; | |
1297 | } | |
1298 | ||
1299 | if (list_empty(&ep0->queue)) | |
1300 | req = NULL; | |
1301 | else | |
1302 | req = list_entry(ep0->queue.next, struct at91_request, queue); | |
1303 | ||
1304 | /* host ACKed an IN packet that we sent */ | |
1305 | if (csr & AT91_UDP_TXCOMP) { | |
1306 | csr |= CLR_FX; | |
1307 | csr &= ~(SET_FX | AT91_UDP_TXCOMP); | |
1308 | ||
1309 | /* write more IN DATA? */ | |
1310 | if (req && ep0->is_in) { | |
1311 | if (handle_ep(ep0)) | |
1312 | udc->req_pending = 0; | |
1313 | ||
1314 | /* | |
1315 | * Ack after: | |
1316 | * - last IN DATA packet (including GET_STATUS) | |
1317 | * - IN/STATUS for OUT DATA | |
1318 | * - IN/STATUS for any zero-length DATA stage | |
1319 | * except for the IN DATA case, the host should send | |
1320 | * an OUT status later, which we'll ack. | |
1321 | */ | |
1322 | } else { | |
1323 | udc->req_pending = 0; | |
1324 | __raw_writel(csr, creg); | |
1325 | ||
1326 | /* | |
1327 | * SET_ADDRESS takes effect only after the STATUS | |
1328 | * (to the original address) gets acked. | |
1329 | */ | |
1330 | if (udc->wait_for_addr_ack) { | |
1331 | u32 tmp; | |
1332 | ||
ffd3326b | 1333 | at91_udp_write(udc, AT91_UDP_FADDR, |
8b2e7668 | 1334 | AT91_UDP_FEN | udc->addr); |
ffd3326b | 1335 | tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT); |
bae4bd84 DB |
1336 | tmp &= ~AT91_UDP_FADDEN; |
1337 | if (udc->addr) | |
1338 | tmp |= AT91_UDP_FADDEN; | |
ffd3326b | 1339 | at91_udp_write(udc, AT91_UDP_GLB_STAT, tmp); |
bae4bd84 DB |
1340 | |
1341 | udc->wait_for_addr_ack = 0; | |
1342 | VDBG("address %d\n", udc->addr); | |
1343 | } | |
1344 | } | |
1345 | } | |
1346 | ||
1347 | /* OUT packet arrived ... */ | |
1348 | else if (csr & AT91_UDP_RX_DATA_BK0) { | |
1349 | csr |= CLR_FX; | |
1350 | csr &= ~(SET_FX | AT91_UDP_RX_DATA_BK0); | |
1351 | ||
1352 | /* OUT DATA stage */ | |
1353 | if (!ep0->is_in) { | |
1354 | if (req) { | |
1355 | if (handle_ep(ep0)) { | |
1356 | /* send IN/STATUS */ | |
1357 | PACKET("ep0 in/status\n"); | |
1358 | csr = __raw_readl(creg); | |
1359 | csr &= ~SET_FX; | |
1360 | csr |= CLR_FX | AT91_UDP_TXPKTRDY; | |
1361 | __raw_writel(csr, creg); | |
1362 | udc->req_pending = 0; | |
1363 | } | |
1364 | } else if (udc->req_pending) { | |
1365 | /* | |
1366 | * AT91 hardware has a hard time with this | |
1367 | * "deferred response" mode for control-OUT | |
1368 | * transfers. (For control-IN it's fine.) | |
1369 | * | |
1370 | * The normal solution leaves OUT data in the | |
1371 | * fifo until the gadget driver is ready. | |
1372 | * We couldn't do that here without disabling | |
1373 | * the IRQ that tells about SETUP packets, | |
1374 | * e.g. when the host gets impatient... | |
1375 | * | |
1376 | * Working around it by copying into a buffer | |
1377 | * would almost be a non-deferred response, | |
1378 | * except that it wouldn't permit reliable | |
1379 | * stalling of the request. Instead, demand | |
1380 | * that gadget drivers not use this mode. | |
1381 | */ | |
1382 | DBG("no control-OUT deferred responses!\n"); | |
1383 | __raw_writel(csr | AT91_UDP_FORCESTALL, creg); | |
1384 | udc->req_pending = 0; | |
1385 | } | |
1386 | ||
1387 | /* STATUS stage for control-IN; ack. */ | |
1388 | } else { | |
1389 | PACKET("ep0 out/status ACK\n"); | |
1390 | __raw_writel(csr, creg); | |
1391 | ||
1392 | /* "early" status stage */ | |
1393 | if (req) | |
1394 | done(ep0, req, 0); | |
1395 | } | |
1396 | } | |
1397 | } | |
1398 | ||
7d12e780 | 1399 | static irqreturn_t at91_udc_irq (int irq, void *_udc) |
bae4bd84 DB |
1400 | { |
1401 | struct at91_udc *udc = _udc; | |
1402 | u32 rescans = 5; | |
c6c35237 | 1403 | int disable_clock = 0; |
4f4c5e36 HH |
1404 | unsigned long flags; |
1405 | ||
1406 | spin_lock_irqsave(&udc->lock, flags); | |
c6c35237 HH |
1407 | |
1408 | if (!udc->clocked) { | |
1409 | clk_on(udc); | |
1410 | disable_clock = 1; | |
1411 | } | |
bae4bd84 DB |
1412 | |
1413 | while (rescans--) { | |
8b2e7668 | 1414 | u32 status; |
bae4bd84 | 1415 | |
ffd3326b AV |
1416 | status = at91_udp_read(udc, AT91_UDP_ISR) |
1417 | & at91_udp_read(udc, AT91_UDP_IMR); | |
bae4bd84 DB |
1418 | if (!status) |
1419 | break; | |
1420 | ||
1421 | /* USB reset irq: not maskable */ | |
1422 | if (status & AT91_UDP_ENDBUSRES) { | |
ffd3326b AV |
1423 | at91_udp_write(udc, AT91_UDP_IDR, ~MINIMUS_INTERRUPTUS); |
1424 | at91_udp_write(udc, AT91_UDP_IER, MINIMUS_INTERRUPTUS); | |
bae4bd84 | 1425 | /* Atmel code clears this irq twice */ |
ffd3326b AV |
1426 | at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_ENDBUSRES); |
1427 | at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_ENDBUSRES); | |
bae4bd84 DB |
1428 | VDBG("end bus reset\n"); |
1429 | udc->addr = 0; | |
1430 | stop_activity(udc); | |
1431 | ||
1432 | /* enable ep0 */ | |
ffd3326b | 1433 | at91_udp_write(udc, AT91_UDP_CSR(0), |
8b2e7668 | 1434 | AT91_UDP_EPEDS | AT91_UDP_EPTYPE_CTRL); |
bae4bd84 DB |
1435 | udc->gadget.speed = USB_SPEED_FULL; |
1436 | udc->suspended = 0; | |
ffd3326b | 1437 | at91_udp_write(udc, AT91_UDP_IER, AT91_UDP_EP(0)); |
bae4bd84 DB |
1438 | |
1439 | /* | |
1440 | * NOTE: this driver keeps clocks off unless the | |
8b2e7668 DB |
1441 | * USB host is present. That saves power, but for |
1442 | * boards that don't support VBUS detection, both | |
1443 | * clocks need to be active most of the time. | |
bae4bd84 DB |
1444 | */ |
1445 | ||
1446 | /* host initiated suspend (3+ms bus idle) */ | |
1447 | } else if (status & AT91_UDP_RXSUSP) { | |
ffd3326b AV |
1448 | at91_udp_write(udc, AT91_UDP_IDR, AT91_UDP_RXSUSP); |
1449 | at91_udp_write(udc, AT91_UDP_IER, AT91_UDP_RXRSM); | |
1450 | at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_RXSUSP); | |
1a8060d9 | 1451 | /* VDBG("bus suspend\n"); */ |
bae4bd84 DB |
1452 | if (udc->suspended) |
1453 | continue; | |
1454 | udc->suspended = 1; | |
1455 | ||
1456 | /* | |
1457 | * NOTE: when suspending a VBUS-powered device, the | |
1458 | * gadget driver should switch into slow clock mode | |
1459 | * and then into standby to avoid drawing more than | |
1460 | * 500uA power (2500uA for some high-power configs). | |
1461 | */ | |
4f4c5e36 HH |
1462 | if (udc->driver && udc->driver->suspend) { |
1463 | spin_unlock(&udc->lock); | |
bae4bd84 | 1464 | udc->driver->suspend(&udc->gadget); |
4f4c5e36 HH |
1465 | spin_lock(&udc->lock); |
1466 | } | |
bae4bd84 DB |
1467 | |
1468 | /* host initiated resume */ | |
1469 | } else if (status & AT91_UDP_RXRSM) { | |
ffd3326b AV |
1470 | at91_udp_write(udc, AT91_UDP_IDR, AT91_UDP_RXRSM); |
1471 | at91_udp_write(udc, AT91_UDP_IER, AT91_UDP_RXSUSP); | |
1472 | at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_RXRSM); | |
1a8060d9 | 1473 | /* VDBG("bus resume\n"); */ |
bae4bd84 DB |
1474 | if (!udc->suspended) |
1475 | continue; | |
1476 | udc->suspended = 0; | |
1477 | ||
1478 | /* | |
1479 | * NOTE: for a VBUS-powered device, the gadget driver | |
1480 | * would normally want to switch out of slow clock | |
1481 | * mode into normal mode. | |
1482 | */ | |
4f4c5e36 HH |
1483 | if (udc->driver && udc->driver->resume) { |
1484 | spin_unlock(&udc->lock); | |
bae4bd84 | 1485 | udc->driver->resume(&udc->gadget); |
4f4c5e36 HH |
1486 | spin_lock(&udc->lock); |
1487 | } | |
bae4bd84 DB |
1488 | |
1489 | /* endpoint IRQs are cleared by handling them */ | |
1490 | } else { | |
1491 | int i; | |
1492 | unsigned mask = 1; | |
1493 | struct at91_ep *ep = &udc->ep[1]; | |
1494 | ||
1495 | if (status & mask) | |
1496 | handle_ep0(udc); | |
1497 | for (i = 1; i < NUM_ENDPOINTS; i++) { | |
1498 | mask <<= 1; | |
1499 | if (status & mask) | |
1500 | handle_ep(ep); | |
1501 | ep++; | |
1502 | } | |
1503 | } | |
1504 | } | |
1505 | ||
c6c35237 HH |
1506 | if (disable_clock) |
1507 | clk_off(udc); | |
1508 | ||
4f4c5e36 HH |
1509 | spin_unlock_irqrestore(&udc->lock, flags); |
1510 | ||
bae4bd84 DB |
1511 | return IRQ_HANDLED; |
1512 | } | |
1513 | ||
1514 | /*-------------------------------------------------------------------------*/ | |
1515 | ||
8b2e7668 DB |
1516 | static void nop_release(struct device *dev) |
1517 | { | |
1518 | /* nothing to free */ | |
1519 | } | |
1520 | ||
bae4bd84 DB |
1521 | static struct at91_udc controller = { |
1522 | .gadget = { | |
8b2e7668 DB |
1523 | .ops = &at91_udc_ops, |
1524 | .ep0 = &controller.ep[0].ep, | |
1525 | .name = driver_name, | |
1526 | .dev = { | |
c682b170 | 1527 | .init_name = "gadget", |
8b2e7668 | 1528 | .release = nop_release, |
bae4bd84 DB |
1529 | } |
1530 | }, | |
1531 | .ep[0] = { | |
1532 | .ep = { | |
1533 | .name = ep0name, | |
1534 | .ops = &at91_ep_ops, | |
1535 | }, | |
1536 | .udc = &controller, | |
1537 | .maxpacket = 8, | |
bae4bd84 DB |
1538 | .int_mask = 1 << 0, |
1539 | }, | |
1540 | .ep[1] = { | |
1541 | .ep = { | |
1542 | .name = "ep1", | |
1543 | .ops = &at91_ep_ops, | |
1544 | }, | |
1545 | .udc = &controller, | |
1546 | .is_pingpong = 1, | |
1547 | .maxpacket = 64, | |
bae4bd84 DB |
1548 | .int_mask = 1 << 1, |
1549 | }, | |
1550 | .ep[2] = { | |
1551 | .ep = { | |
1552 | .name = "ep2", | |
1553 | .ops = &at91_ep_ops, | |
1554 | }, | |
1555 | .udc = &controller, | |
1556 | .is_pingpong = 1, | |
1557 | .maxpacket = 64, | |
bae4bd84 DB |
1558 | .int_mask = 1 << 2, |
1559 | }, | |
1560 | .ep[3] = { | |
1561 | .ep = { | |
1562 | /* could actually do bulk too */ | |
1563 | .name = "ep3-int", | |
1564 | .ops = &at91_ep_ops, | |
1565 | }, | |
1566 | .udc = &controller, | |
1567 | .maxpacket = 8, | |
bae4bd84 DB |
1568 | .int_mask = 1 << 3, |
1569 | }, | |
1570 | .ep[4] = { | |
1571 | .ep = { | |
1572 | .name = "ep4", | |
1573 | .ops = &at91_ep_ops, | |
1574 | }, | |
1575 | .udc = &controller, | |
1576 | .is_pingpong = 1, | |
1577 | .maxpacket = 256, | |
bae4bd84 DB |
1578 | .int_mask = 1 << 4, |
1579 | }, | |
1580 | .ep[5] = { | |
1581 | .ep = { | |
1582 | .name = "ep5", | |
1583 | .ops = &at91_ep_ops, | |
1584 | }, | |
1585 | .udc = &controller, | |
1586 | .is_pingpong = 1, | |
1587 | .maxpacket = 256, | |
bae4bd84 DB |
1588 | .int_mask = 1 << 5, |
1589 | }, | |
8b2e7668 | 1590 | /* ep6 and ep7 are also reserved (custom silicon might use them) */ |
bae4bd84 DB |
1591 | }; |
1592 | ||
4037242c RM |
1593 | static void at91_vbus_update(struct at91_udc *udc, unsigned value) |
1594 | { | |
1595 | value ^= udc->board.vbus_active_low; | |
1596 | if (value != udc->vbus) | |
1597 | at91_vbus_session(&udc->gadget, value); | |
1598 | } | |
1599 | ||
7d12e780 | 1600 | static irqreturn_t at91_vbus_irq(int irq, void *_udc) |
bae4bd84 DB |
1601 | { |
1602 | struct at91_udc *udc = _udc; | |
bae4bd84 DB |
1603 | |
1604 | /* vbus needs at least brief debouncing */ | |
1605 | udelay(10); | |
4037242c | 1606 | at91_vbus_update(udc, gpio_get_value(udc->board.vbus_pin)); |
bae4bd84 DB |
1607 | |
1608 | return IRQ_HANDLED; | |
1609 | } | |
1610 | ||
4037242c RM |
1611 | static void at91_vbus_timer_work(struct work_struct *work) |
1612 | { | |
1613 | struct at91_udc *udc = container_of(work, struct at91_udc, | |
1614 | vbus_timer_work); | |
1615 | ||
1616 | at91_vbus_update(udc, gpio_get_value_cansleep(udc->board.vbus_pin)); | |
1617 | ||
1618 | if (!timer_pending(&udc->vbus_timer)) | |
1619 | mod_timer(&udc->vbus_timer, jiffies + VBUS_POLL_TIMEOUT); | |
1620 | } | |
1621 | ||
1622 | static void at91_vbus_timer(unsigned long data) | |
1623 | { | |
1624 | struct at91_udc *udc = (struct at91_udc *)data; | |
1625 | ||
1626 | /* | |
1627 | * If we are polling vbus it is likely that the gpio is on an | |
1628 | * bus such as i2c or spi which may sleep, so schedule some work | |
1629 | * to read the vbus gpio | |
1630 | */ | |
348409a2 | 1631 | schedule_work(&udc->vbus_timer_work); |
4037242c RM |
1632 | } |
1633 | ||
f3d8bf34 SAS |
1634 | static int at91_start(struct usb_gadget *gadget, |
1635 | struct usb_gadget_driver *driver) | |
bae4bd84 | 1636 | { |
f3d8bf34 | 1637 | struct at91_udc *udc; |
bae4bd84 | 1638 | |
f3d8bf34 | 1639 | udc = container_of(gadget, struct at91_udc, gadget); |
bae4bd84 | 1640 | udc->driver = driver; |
65c84ea1 | 1641 | udc->gadget.dev.of_node = udc->pdev->dev.of_node; |
bae4bd84 DB |
1642 | udc->enabled = 1; |
1643 | udc->selfpowered = 1; | |
1644 | ||
bae4bd84 DB |
1645 | DBG("bound to %s\n", driver->driver.name); |
1646 | return 0; | |
1647 | } | |
bae4bd84 | 1648 | |
f3d8bf34 SAS |
1649 | static int at91_stop(struct usb_gadget *gadget, |
1650 | struct usb_gadget_driver *driver) | |
bae4bd84 | 1651 | { |
f3d8bf34 | 1652 | struct at91_udc *udc; |
4f4c5e36 | 1653 | unsigned long flags; |
bae4bd84 | 1654 | |
f3d8bf34 | 1655 | udc = container_of(gadget, struct at91_udc, gadget); |
4f4c5e36 | 1656 | spin_lock_irqsave(&udc->lock, flags); |
bae4bd84 | 1657 | udc->enabled = 0; |
ffd3326b | 1658 | at91_udp_write(udc, AT91_UDP_IDR, ~0); |
4f4c5e36 | 1659 | spin_unlock_irqrestore(&udc->lock, flags); |
bae4bd84 | 1660 | |
bae4bd84 DB |
1661 | udc->driver = NULL; |
1662 | ||
1663 | DBG("unbound from %s\n", driver->driver.name); | |
1664 | return 0; | |
1665 | } | |
bae4bd84 DB |
1666 | |
1667 | /*-------------------------------------------------------------------------*/ | |
1668 | ||
1669 | static void at91udc_shutdown(struct platform_device *dev) | |
1670 | { | |
4f4c5e36 HH |
1671 | struct at91_udc *udc = platform_get_drvdata(dev); |
1672 | unsigned long flags; | |
1673 | ||
bae4bd84 | 1674 | /* force disconnect on reboot */ |
4f4c5e36 | 1675 | spin_lock_irqsave(&udc->lock, flags); |
bae4bd84 | 1676 | pullup(platform_get_drvdata(dev), 0); |
4f4c5e36 | 1677 | spin_unlock_irqrestore(&udc->lock, flags); |
bae4bd84 DB |
1678 | } |
1679 | ||
41ac7b3a | 1680 | static void at91udc_of_init(struct at91_udc *udc, |
d1494a34 JCPV |
1681 | struct device_node *np) |
1682 | { | |
1683 | struct at91_udc_data *board = &udc->board; | |
1684 | u32 val; | |
1685 | enum of_gpio_flags flags; | |
1686 | ||
1687 | if (of_property_read_u32(np, "atmel,vbus-polled", &val) == 0) | |
1688 | board->vbus_polled = 1; | |
1689 | ||
1690 | board->vbus_pin = of_get_named_gpio_flags(np, "atmel,vbus-gpio", 0, | |
1691 | &flags); | |
1692 | board->vbus_active_low = (flags & OF_GPIO_ACTIVE_LOW) ? 1 : 0; | |
1693 | ||
1694 | board->pullup_pin = of_get_named_gpio_flags(np, "atmel,pullup-gpio", 0, | |
1695 | &flags); | |
1696 | ||
1697 | board->pullup_active_low = (flags & OF_GPIO_ACTIVE_LOW) ? 1 : 0; | |
1698 | } | |
1699 | ||
41ac7b3a | 1700 | static int at91udc_probe(struct platform_device *pdev) |
bae4bd84 DB |
1701 | { |
1702 | struct device *dev = &pdev->dev; | |
1703 | struct at91_udc *udc; | |
1704 | int retval; | |
ffd3326b | 1705 | struct resource *res; |
bae4bd84 | 1706 | |
e01ee9f5 | 1707 | if (!dev_get_platdata(dev) && !pdev->dev.of_node) { |
bae4bd84 DB |
1708 | /* small (so we copy it) but critical! */ |
1709 | DBG("missing platform_data\n"); | |
1710 | return -ENODEV; | |
1711 | } | |
1712 | ||
8b2e7668 | 1713 | if (pdev->num_resources != 2) { |
f3db6e82 | 1714 | DBG("invalid num_resources\n"); |
8b2e7668 DB |
1715 | return -ENODEV; |
1716 | } | |
1717 | if ((pdev->resource[0].flags != IORESOURCE_MEM) | |
1718 | || (pdev->resource[1].flags != IORESOURCE_IRQ)) { | |
f3db6e82 | 1719 | DBG("invalid resource type\n"); |
8b2e7668 DB |
1720 | return -ENODEV; |
1721 | } | |
1722 | ||
ffd3326b AV |
1723 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
1724 | if (!res) | |
1725 | return -ENXIO; | |
1726 | ||
d8bb0fd2 | 1727 | if (!request_mem_region(res->start, resource_size(res), driver_name)) { |
bae4bd84 DB |
1728 | DBG("someone's using UDC memory\n"); |
1729 | return -EBUSY; | |
1730 | } | |
1731 | ||
1732 | /* init software state */ | |
1733 | udc = &controller; | |
1734 | udc->gadget.dev.parent = dev; | |
ae40d64b | 1735 | if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) |
d1494a34 JCPV |
1736 | at91udc_of_init(udc, pdev->dev.of_node); |
1737 | else | |
e01ee9f5 | 1738 | memcpy(&udc->board, dev_get_platdata(dev), |
d1494a34 | 1739 | sizeof(struct at91_udc_data)); |
bae4bd84 | 1740 | udc->pdev = pdev; |
bae4bd84 | 1741 | udc->enabled = 0; |
4f4c5e36 | 1742 | spin_lock_init(&udc->lock); |
bae4bd84 | 1743 | |
f3db6e82 DB |
1744 | /* rm9200 needs manual D+ pullup; off by default */ |
1745 | if (cpu_is_at91rm9200()) { | |
d2aec37c | 1746 | if (!gpio_is_valid(udc->board.pullup_pin)) { |
f3db6e82 DB |
1747 | DBG("no D+ pullup?\n"); |
1748 | retval = -ENODEV; | |
1749 | goto fail0; | |
1750 | } | |
1751 | retval = gpio_request(udc->board.pullup_pin, "udc_pullup"); | |
1752 | if (retval) { | |
1753 | DBG("D+ pullup is busy\n"); | |
1754 | goto fail0; | |
1755 | } | |
1756 | gpio_direction_output(udc->board.pullup_pin, | |
1757 | udc->board.pullup_active_low); | |
1758 | } | |
1759 | ||
bb24280f | 1760 | /* newer chips have more FIFO memory than rm9200 */ |
bf1f0a05 | 1761 | if (cpu_is_at91sam9260() || cpu_is_at91sam9g20()) { |
bb24280f DB |
1762 | udc->ep[0].maxpacket = 64; |
1763 | udc->ep[3].maxpacket = 64; | |
1764 | udc->ep[4].maxpacket = 512; | |
1765 | udc->ep[5].maxpacket = 512; | |
23f6d914 | 1766 | } else if (cpu_is_at91sam9261() || cpu_is_at91sam9g10()) { |
bb24280f DB |
1767 | udc->ep[3].maxpacket = 64; |
1768 | } else if (cpu_is_at91sam9263()) { | |
1769 | udc->ep[0].maxpacket = 64; | |
1770 | udc->ep[3].maxpacket = 64; | |
1771 | } | |
1772 | ||
d8bb0fd2 | 1773 | udc->udp_baseaddr = ioremap(res->start, resource_size(res)); |
ffd3326b | 1774 | if (!udc->udp_baseaddr) { |
f3db6e82 DB |
1775 | retval = -ENOMEM; |
1776 | goto fail0a; | |
ffd3326b AV |
1777 | } |
1778 | ||
1779 | udc_reinit(udc); | |
1780 | ||
bae4bd84 DB |
1781 | /* get interface and function clocks */ |
1782 | udc->iclk = clk_get(dev, "udc_clk"); | |
1783 | udc->fclk = clk_get(dev, "udpck"); | |
c0aefc75 BB |
1784 | if (IS_ENABLED(CONFIG_COMMON_CLK)) |
1785 | udc->uclk = clk_get(dev, "usb_clk"); | |
1786 | if (IS_ERR(udc->iclk) || IS_ERR(udc->fclk) || | |
1787 | (IS_ENABLED(CONFIG_COMMON_CLK) && IS_ERR(udc->uclk))) { | |
bae4bd84 | 1788 | DBG("clocks missing\n"); |
29ba4b53 | 1789 | retval = -ENODEV; |
2533beea | 1790 | goto fail1; |
8ab10400 | 1791 | } |
bae4bd84 | 1792 | |
8b2e7668 | 1793 | /* don't do anything until we have both gadget driver and VBUS */ |
76280832 BB |
1794 | retval = clk_prepare_enable(udc->iclk); |
1795 | if (retval) | |
1796 | goto fail1; | |
ffd3326b AV |
1797 | at91_udp_write(udc, AT91_UDP_TXVC, AT91_UDP_TXVC_TXVDIS); |
1798 | at91_udp_write(udc, AT91_UDP_IDR, 0xffffffff); | |
29ba4b53 AV |
1799 | /* Clear all pending interrupts - UDP may be used by bootloader. */ |
1800 | at91_udp_write(udc, AT91_UDP_ICR, 0xffffffff); | |
76280832 | 1801 | clk_disable_unprepare(udc->iclk); |
bae4bd84 DB |
1802 | |
1803 | /* request UDC and maybe VBUS irqs */ | |
8b2e7668 | 1804 | udc->udp_irq = platform_get_irq(pdev, 0); |
f3db6e82 | 1805 | retval = request_irq(udc->udp_irq, at91_udc_irq, |
b5dd18d8 | 1806 | 0, driver_name, udc); |
f3db6e82 | 1807 | if (retval < 0) { |
8b2e7668 | 1808 | DBG("request irq %d failed\n", udc->udp_irq); |
bae4bd84 DB |
1809 | goto fail1; |
1810 | } | |
3285e0ec | 1811 | if (gpio_is_valid(udc->board.vbus_pin)) { |
f3db6e82 DB |
1812 | retval = gpio_request(udc->board.vbus_pin, "udc_vbus"); |
1813 | if (retval < 0) { | |
1814 | DBG("request vbus pin failed\n"); | |
1815 | goto fail2; | |
1816 | } | |
1817 | gpio_direction_input(udc->board.vbus_pin); | |
1818 | ||
29ba4b53 AV |
1819 | /* |
1820 | * Get the initial state of VBUS - we cannot expect | |
1821 | * a pending interrupt. | |
1822 | */ | |
4037242c RM |
1823 | udc->vbus = gpio_get_value_cansleep(udc->board.vbus_pin) ^ |
1824 | udc->board.vbus_active_low; | |
1825 | ||
1826 | if (udc->board.vbus_polled) { | |
1827 | INIT_WORK(&udc->vbus_timer_work, at91_vbus_timer_work); | |
1828 | setup_timer(&udc->vbus_timer, at91_vbus_timer, | |
1829 | (unsigned long)udc); | |
1830 | mod_timer(&udc->vbus_timer, | |
1831 | jiffies + VBUS_POLL_TIMEOUT); | |
1832 | } else { | |
70756027 NF |
1833 | if (request_irq(gpio_to_irq(udc->board.vbus_pin), |
1834 | at91_vbus_irq, 0, driver_name, udc)) { | |
4037242c RM |
1835 | DBG("request vbus irq %d failed\n", |
1836 | udc->board.vbus_pin); | |
1837 | retval = -EBUSY; | |
1838 | goto fail3; | |
1839 | } | |
bae4bd84 DB |
1840 | } |
1841 | } else { | |
1842 | DBG("no VBUS detection, assuming always-on\n"); | |
1843 | udc->vbus = 1; | |
1844 | } | |
0f91349b SAS |
1845 | retval = usb_add_gadget_udc(dev, &udc->gadget); |
1846 | if (retval) | |
1847 | goto fail4; | |
bae4bd84 | 1848 | dev_set_drvdata(dev, udc); |
8b2e7668 | 1849 | device_init_wakeup(dev, 1); |
bae4bd84 DB |
1850 | create_debug_file(udc); |
1851 | ||
1852 | INFO("%s version %s\n", driver_name, DRIVER_VERSION); | |
1853 | return 0; | |
0f91349b | 1854 | fail4: |
3285e0ec | 1855 | if (gpio_is_valid(udc->board.vbus_pin) && !udc->board.vbus_polled) |
70756027 | 1856 | free_irq(gpio_to_irq(udc->board.vbus_pin), udc); |
f3db6e82 | 1857 | fail3: |
3285e0ec | 1858 | if (gpio_is_valid(udc->board.vbus_pin)) |
f3db6e82 DB |
1859 | gpio_free(udc->board.vbus_pin); |
1860 | fail2: | |
1861 | free_irq(udc->udp_irq, udc); | |
bae4bd84 | 1862 | fail1: |
c0aefc75 BB |
1863 | if (IS_ENABLED(CONFIG_COMMON_CLK) && !IS_ERR(udc->uclk)) |
1864 | clk_put(udc->uclk); | |
30ce1987 BB |
1865 | if (!IS_ERR(udc->fclk)) |
1866 | clk_put(udc->fclk); | |
1867 | if (!IS_ERR(udc->iclk)) | |
1868 | clk_put(udc->iclk); | |
f3db6e82 DB |
1869 | iounmap(udc->udp_baseaddr); |
1870 | fail0a: | |
1871 | if (cpu_is_at91rm9200()) | |
1872 | gpio_free(udc->board.pullup_pin); | |
bae4bd84 | 1873 | fail0: |
d8bb0fd2 | 1874 | release_mem_region(res->start, resource_size(res)); |
bae4bd84 DB |
1875 | DBG("%s probe failed, %d\n", driver_name, retval); |
1876 | return retval; | |
1877 | } | |
1878 | ||
398acce7 | 1879 | static int __exit at91udc_remove(struct platform_device *pdev) |
bae4bd84 | 1880 | { |
8b2e7668 | 1881 | struct at91_udc *udc = platform_get_drvdata(pdev); |
ffd3326b | 1882 | struct resource *res; |
4f4c5e36 | 1883 | unsigned long flags; |
bae4bd84 DB |
1884 | |
1885 | DBG("remove\n"); | |
1886 | ||
0f91349b | 1887 | usb_del_gadget_udc(&udc->gadget); |
6bea476c DB |
1888 | if (udc->driver) |
1889 | return -EBUSY; | |
bae4bd84 | 1890 | |
4f4c5e36 | 1891 | spin_lock_irqsave(&udc->lock, flags); |
6bea476c | 1892 | pullup(udc, 0); |
4f4c5e36 | 1893 | spin_unlock_irqrestore(&udc->lock, flags); |
bae4bd84 | 1894 | |
8b2e7668 | 1895 | device_init_wakeup(&pdev->dev, 0); |
bae4bd84 | 1896 | remove_debug_file(udc); |
3285e0ec | 1897 | if (gpio_is_valid(udc->board.vbus_pin)) { |
70756027 | 1898 | free_irq(gpio_to_irq(udc->board.vbus_pin), udc); |
f3db6e82 DB |
1899 | gpio_free(udc->board.vbus_pin); |
1900 | } | |
8b2e7668 | 1901 | free_irq(udc->udp_irq, udc); |
ffd3326b | 1902 | iounmap(udc->udp_baseaddr); |
f3db6e82 DB |
1903 | |
1904 | if (cpu_is_at91rm9200()) | |
1905 | gpio_free(udc->board.pullup_pin); | |
1906 | ||
ffd3326b | 1907 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
d8bb0fd2 | 1908 | release_mem_region(res->start, resource_size(res)); |
bae4bd84 DB |
1909 | |
1910 | clk_put(udc->iclk); | |
1911 | clk_put(udc->fclk); | |
c0aefc75 BB |
1912 | if (IS_ENABLED(CONFIG_COMMON_CLK)) |
1913 | clk_put(udc->uclk); | |
bae4bd84 DB |
1914 | |
1915 | return 0; | |
1916 | } | |
1917 | ||
1918 | #ifdef CONFIG_PM | |
8b2e7668 | 1919 | static int at91udc_suspend(struct platform_device *pdev, pm_message_t mesg) |
bae4bd84 | 1920 | { |
8b2e7668 DB |
1921 | struct at91_udc *udc = platform_get_drvdata(pdev); |
1922 | int wake = udc->driver && device_may_wakeup(&pdev->dev); | |
4f4c5e36 | 1923 | unsigned long flags; |
bae4bd84 | 1924 | |
8b2e7668 DB |
1925 | /* Unless we can act normally to the host (letting it wake us up |
1926 | * whenever it has work for us) force disconnect. Wakeup requires | |
1927 | * PLLB for USB events (signaling for reset, wakeup, or incoming | |
1928 | * tokens) and VBUS irqs (on systems which support them). | |
bae4bd84 | 1929 | */ |
8b2e7668 DB |
1930 | if ((!udc->suspended && udc->addr) |
1931 | || !wake | |
1932 | || at91_suspend_entering_slow_clock()) { | |
4f4c5e36 | 1933 | spin_lock_irqsave(&udc->lock, flags); |
bae4bd84 | 1934 | pullup(udc, 0); |
66e56ce7 | 1935 | wake = 0; |
4f4c5e36 | 1936 | spin_unlock_irqrestore(&udc->lock, flags); |
8b2e7668 DB |
1937 | } else |
1938 | enable_irq_wake(udc->udp_irq); | |
1939 | ||
66e56ce7 | 1940 | udc->active_suspend = wake; |
3285e0ec | 1941 | if (gpio_is_valid(udc->board.vbus_pin) && !udc->board.vbus_polled && wake) |
66e56ce7 | 1942 | enable_irq_wake(udc->board.vbus_pin); |
bae4bd84 DB |
1943 | return 0; |
1944 | } | |
1945 | ||
8b2e7668 | 1946 | static int at91udc_resume(struct platform_device *pdev) |
bae4bd84 | 1947 | { |
8b2e7668 | 1948 | struct at91_udc *udc = platform_get_drvdata(pdev); |
4f4c5e36 | 1949 | unsigned long flags; |
bae4bd84 | 1950 | |
3285e0ec | 1951 | if (gpio_is_valid(udc->board.vbus_pin) && !udc->board.vbus_polled && |
4037242c | 1952 | udc->active_suspend) |
66e56ce7 DB |
1953 | disable_irq_wake(udc->board.vbus_pin); |
1954 | ||
bae4bd84 | 1955 | /* maybe reconnect to host; if so, clocks on */ |
66e56ce7 DB |
1956 | if (udc->active_suspend) |
1957 | disable_irq_wake(udc->udp_irq); | |
4f4c5e36 HH |
1958 | else { |
1959 | spin_lock_irqsave(&udc->lock, flags); | |
66e56ce7 | 1960 | pullup(udc, 1); |
4f4c5e36 HH |
1961 | spin_unlock_irqrestore(&udc->lock, flags); |
1962 | } | |
bae4bd84 DB |
1963 | return 0; |
1964 | } | |
1965 | #else | |
1966 | #define at91udc_suspend NULL | |
1967 | #define at91udc_resume NULL | |
1968 | #endif | |
1969 | ||
d1494a34 JCPV |
1970 | #if defined(CONFIG_OF) |
1971 | static const struct of_device_id at91_udc_dt_ids[] = { | |
1972 | { .compatible = "atmel,at91rm9200-udc" }, | |
1973 | { /* sentinel */ } | |
1974 | }; | |
1975 | ||
1976 | MODULE_DEVICE_TABLE(of, at91_udc_dt_ids); | |
1977 | #endif | |
1978 | ||
dee497df | 1979 | static struct platform_driver at91_udc_driver = { |
398acce7 | 1980 | .remove = __exit_p(at91udc_remove), |
bae4bd84 DB |
1981 | .shutdown = at91udc_shutdown, |
1982 | .suspend = at91udc_suspend, | |
8b2e7668 | 1983 | .resume = at91udc_resume, |
bae4bd84 DB |
1984 | .driver = { |
1985 | .name = (char *) driver_name, | |
1986 | .owner = THIS_MODULE, | |
d1494a34 | 1987 | .of_match_table = of_match_ptr(at91_udc_dt_ids), |
bae4bd84 DB |
1988 | }, |
1989 | }; | |
1990 | ||
52f7a82b | 1991 | module_platform_driver_probe(at91_udc_driver, at91udc_probe); |
bae4bd84 | 1992 | |
8b2e7668 | 1993 | MODULE_DESCRIPTION("AT91 udc driver"); |
bae4bd84 DB |
1994 | MODULE_AUTHOR("Thomas Rathbone, David Brownell"); |
1995 | MODULE_LICENSE("GPL"); | |
f34c32f1 | 1996 | MODULE_ALIAS("platform:at91_udc"); |