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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 | ||
f3db6e82 | 24 | #undef VERBOSE_DEBUG |
bae4bd84 DB |
25 | #undef PACKET_TRACE |
26 | ||
bae4bd84 DB |
27 | #include <linux/kernel.h> |
28 | #include <linux/module.h> | |
29 | #include <linux/platform_device.h> | |
30 | #include <linux/delay.h> | |
31 | #include <linux/ioport.h> | |
bae4bd84 | 32 | #include <linux/slab.h> |
bae4bd84 DB |
33 | #include <linux/errno.h> |
34 | #include <linux/init.h> | |
35 | #include <linux/list.h> | |
36 | #include <linux/interrupt.h> | |
37 | #include <linux/proc_fs.h> | |
38 | #include <linux/clk.h> | |
5f848137 | 39 | #include <linux/usb/ch9.h> |
9454a57a | 40 | #include <linux/usb/gadget.h> |
bae4bd84 DB |
41 | |
42 | #include <asm/byteorder.h> | |
a09e64fb | 43 | #include <mach/hardware.h> |
bae4bd84 DB |
44 | #include <asm/io.h> |
45 | #include <asm/irq.h> | |
46 | #include <asm/system.h> | |
f3db6e82 | 47 | #include <asm/gpio.h> |
bae4bd84 | 48 | |
a09e64fb RK |
49 | #include <mach/board.h> |
50 | #include <mach/cpu.h> | |
51 | #include <mach/at91sam9261_matrix.h> | |
bae4bd84 DB |
52 | |
53 | #include "at91_udc.h" | |
54 | ||
55 | ||
56 | /* | |
57 | * This controller is simple and PIO-only. It's used in many AT91-series | |
8b2e7668 DB |
58 | * full speed USB controllers, including the at91rm9200 (arm920T, with MMU), |
59 | * at91sam926x (arm926ejs, with MMU), and several no-mmu versions. | |
bae4bd84 DB |
60 | * |
61 | * This driver expects the board has been wired with two GPIOs suppporting | |
62 | * a VBUS sensing IRQ, and a D+ pullup. (They may be omitted, but the | |
8b2e7668 DB |
63 | * testing hasn't covered such cases.) |
64 | * | |
65 | * The pullup is most important (so it's integrated on sam926x parts). It | |
bae4bd84 | 66 | * provides software control over whether the host enumerates the device. |
8b2e7668 | 67 | * |
bae4bd84 DB |
68 | * The VBUS sensing helps during enumeration, and allows both USB clocks |
69 | * (and the transceiver) to stay gated off until they're necessary, saving | |
8b2e7668 DB |
70 | * power. During USB suspend, the 48 MHz clock is gated off in hardware; |
71 | * it may also be gated off by software during some Linux sleep states. | |
bae4bd84 DB |
72 | */ |
73 | ||
8b2e7668 | 74 | #define DRIVER_VERSION "3 May 2006" |
bae4bd84 DB |
75 | |
76 | static const char driver_name [] = "at91_udc"; | |
77 | static const char ep0name[] = "ep0"; | |
78 | ||
bae4bd84 | 79 | |
ffd3326b AV |
80 | #define at91_udp_read(dev, reg) \ |
81 | __raw_readl((dev)->udp_baseaddr + (reg)) | |
82 | #define at91_udp_write(dev, reg, val) \ | |
83 | __raw_writel((val), (dev)->udp_baseaddr + (reg)) | |
bae4bd84 DB |
84 | |
85 | /*-------------------------------------------------------------------------*/ | |
86 | ||
87 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
88 | ||
89 | #include <linux/seq_file.h> | |
90 | ||
91 | static const char debug_filename[] = "driver/udc"; | |
92 | ||
93 | #define FOURBITS "%s%s%s%s" | |
94 | #define EIGHTBITS FOURBITS FOURBITS | |
95 | ||
96 | static void proc_ep_show(struct seq_file *s, struct at91_ep *ep) | |
97 | { | |
98 | static char *types[] = { | |
99 | "control", "out-iso", "out-bulk", "out-int", | |
100 | "BOGUS", "in-iso", "in-bulk", "in-int"}; | |
101 | ||
102 | u32 csr; | |
103 | struct at91_request *req; | |
104 | unsigned long flags; | |
105 | ||
106 | local_irq_save(flags); | |
107 | ||
108 | csr = __raw_readl(ep->creg); | |
109 | ||
110 | /* NOTE: not collecting per-endpoint irq statistics... */ | |
111 | ||
112 | seq_printf(s, "\n"); | |
113 | seq_printf(s, "%s, maxpacket %d %s%s %s%s\n", | |
114 | ep->ep.name, ep->ep.maxpacket, | |
115 | ep->is_in ? "in" : "out", | |
116 | ep->is_iso ? " iso" : "", | |
117 | ep->is_pingpong | |
118 | ? (ep->fifo_bank ? "pong" : "ping") | |
119 | : "", | |
120 | ep->stopped ? " stopped" : ""); | |
121 | seq_printf(s, "csr %08x rxbytes=%d %s %s %s" EIGHTBITS "\n", | |
122 | csr, | |
123 | (csr & 0x07ff0000) >> 16, | |
124 | (csr & (1 << 15)) ? "enabled" : "disabled", | |
125 | (csr & (1 << 11)) ? "DATA1" : "DATA0", | |
126 | types[(csr & 0x700) >> 8], | |
127 | ||
128 | /* iff type is control then print current direction */ | |
129 | (!(csr & 0x700)) | |
130 | ? ((csr & (1 << 7)) ? " IN" : " OUT") | |
131 | : "", | |
132 | (csr & (1 << 6)) ? " rxdatabk1" : "", | |
133 | (csr & (1 << 5)) ? " forcestall" : "", | |
134 | (csr & (1 << 4)) ? " txpktrdy" : "", | |
135 | ||
136 | (csr & (1 << 3)) ? " stallsent" : "", | |
137 | (csr & (1 << 2)) ? " rxsetup" : "", | |
138 | (csr & (1 << 1)) ? " rxdatabk0" : "", | |
139 | (csr & (1 << 0)) ? " txcomp" : ""); | |
140 | if (list_empty (&ep->queue)) | |
141 | seq_printf(s, "\t(queue empty)\n"); | |
142 | ||
143 | else list_for_each_entry (req, &ep->queue, queue) { | |
144 | unsigned length = req->req.actual; | |
145 | ||
146 | seq_printf(s, "\treq %p len %d/%d buf %p\n", | |
147 | &req->req, length, | |
148 | req->req.length, req->req.buf); | |
149 | } | |
150 | local_irq_restore(flags); | |
151 | } | |
152 | ||
153 | static void proc_irq_show(struct seq_file *s, const char *label, u32 mask) | |
154 | { | |
155 | int i; | |
156 | ||
157 | seq_printf(s, "%s %04x:%s%s" FOURBITS, label, mask, | |
158 | (mask & (1 << 13)) ? " wakeup" : "", | |
159 | (mask & (1 << 12)) ? " endbusres" : "", | |
160 | ||
161 | (mask & (1 << 11)) ? " sofint" : "", | |
162 | (mask & (1 << 10)) ? " extrsm" : "", | |
163 | (mask & (1 << 9)) ? " rxrsm" : "", | |
164 | (mask & (1 << 8)) ? " rxsusp" : ""); | |
165 | for (i = 0; i < 8; i++) { | |
166 | if (mask & (1 << i)) | |
167 | seq_printf(s, " ep%d", i); | |
168 | } | |
169 | seq_printf(s, "\n"); | |
170 | } | |
171 | ||
172 | static int proc_udc_show(struct seq_file *s, void *unused) | |
173 | { | |
174 | struct at91_udc *udc = s->private; | |
175 | struct at91_ep *ep; | |
176 | u32 tmp; | |
177 | ||
178 | seq_printf(s, "%s: version %s\n", driver_name, DRIVER_VERSION); | |
179 | ||
180 | seq_printf(s, "vbus %s, pullup %s, %s powered%s, gadget %s\n\n", | |
181 | udc->vbus ? "present" : "off", | |
182 | udc->enabled | |
183 | ? (udc->vbus ? "active" : "enabled") | |
184 | : "disabled", | |
185 | udc->selfpowered ? "self" : "VBUS", | |
186 | udc->suspended ? ", suspended" : "", | |
187 | udc->driver ? udc->driver->driver.name : "(none)"); | |
188 | ||
189 | /* don't access registers when interface isn't clocked */ | |
190 | if (!udc->clocked) { | |
191 | seq_printf(s, "(not clocked)\n"); | |
192 | return 0; | |
193 | } | |
194 | ||
ffd3326b | 195 | tmp = at91_udp_read(udc, AT91_UDP_FRM_NUM); |
bae4bd84 DB |
196 | seq_printf(s, "frame %05x:%s%s frame=%d\n", tmp, |
197 | (tmp & AT91_UDP_FRM_OK) ? " ok" : "", | |
198 | (tmp & AT91_UDP_FRM_ERR) ? " err" : "", | |
199 | (tmp & AT91_UDP_NUM)); | |
200 | ||
ffd3326b | 201 | tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT); |
bae4bd84 DB |
202 | seq_printf(s, "glbstate %02x:%s" FOURBITS "\n", tmp, |
203 | (tmp & AT91_UDP_RMWUPE) ? " rmwupe" : "", | |
204 | (tmp & AT91_UDP_RSMINPR) ? " rsminpr" : "", | |
205 | (tmp & AT91_UDP_ESR) ? " esr" : "", | |
206 | (tmp & AT91_UDP_CONFG) ? " confg" : "", | |
207 | (tmp & AT91_UDP_FADDEN) ? " fadden" : ""); | |
208 | ||
ffd3326b | 209 | tmp = at91_udp_read(udc, AT91_UDP_FADDR); |
bae4bd84 DB |
210 | seq_printf(s, "faddr %03x:%s fadd=%d\n", tmp, |
211 | (tmp & AT91_UDP_FEN) ? " fen" : "", | |
212 | (tmp & AT91_UDP_FADD)); | |
213 | ||
ffd3326b AV |
214 | proc_irq_show(s, "imr ", at91_udp_read(udc, AT91_UDP_IMR)); |
215 | proc_irq_show(s, "isr ", at91_udp_read(udc, AT91_UDP_ISR)); | |
bae4bd84 DB |
216 | |
217 | if (udc->enabled && udc->vbus) { | |
218 | proc_ep_show(s, &udc->ep[0]); | |
219 | list_for_each_entry (ep, &udc->gadget.ep_list, ep.ep_list) { | |
220 | if (ep->desc) | |
221 | proc_ep_show(s, ep); | |
222 | } | |
223 | } | |
224 | return 0; | |
225 | } | |
226 | ||
227 | static int proc_udc_open(struct inode *inode, struct file *file) | |
228 | { | |
229 | return single_open(file, proc_udc_show, PDE(inode)->data); | |
230 | } | |
231 | ||
066202dd | 232 | static const struct file_operations proc_ops = { |
cdefa185 | 233 | .owner = THIS_MODULE, |
bae4bd84 DB |
234 | .open = proc_udc_open, |
235 | .read = seq_read, | |
236 | .llseek = seq_lseek, | |
237 | .release = single_release, | |
238 | }; | |
239 | ||
240 | static void create_debug_file(struct at91_udc *udc) | |
241 | { | |
cdefa185 | 242 | udc->pde = proc_create_data(debug_filename, 0, NULL, &proc_ops, udc); |
bae4bd84 DB |
243 | } |
244 | ||
245 | static void remove_debug_file(struct at91_udc *udc) | |
246 | { | |
247 | if (udc->pde) | |
248 | remove_proc_entry(debug_filename, NULL); | |
249 | } | |
250 | ||
251 | #else | |
252 | ||
253 | static inline void create_debug_file(struct at91_udc *udc) {} | |
254 | static inline void remove_debug_file(struct at91_udc *udc) {} | |
255 | ||
256 | #endif | |
257 | ||
258 | ||
259 | /*-------------------------------------------------------------------------*/ | |
260 | ||
261 | static void done(struct at91_ep *ep, struct at91_request *req, int status) | |
262 | { | |
263 | unsigned stopped = ep->stopped; | |
ffd3326b | 264 | struct at91_udc *udc = ep->udc; |
bae4bd84 DB |
265 | |
266 | list_del_init(&req->queue); | |
267 | if (req->req.status == -EINPROGRESS) | |
268 | req->req.status = status; | |
269 | else | |
270 | status = req->req.status; | |
271 | if (status && status != -ESHUTDOWN) | |
272 | VDBG("%s done %p, status %d\n", ep->ep.name, req, status); | |
273 | ||
274 | ep->stopped = 1; | |
275 | req->req.complete(&ep->ep, &req->req); | |
276 | ep->stopped = stopped; | |
277 | ||
278 | /* ep0 is always ready; other endpoints need a non-empty queue */ | |
279 | if (list_empty(&ep->queue) && ep->int_mask != (1 << 0)) | |
ffd3326b | 280 | at91_udp_write(udc, AT91_UDP_IDR, ep->int_mask); |
bae4bd84 DB |
281 | } |
282 | ||
283 | /*-------------------------------------------------------------------------*/ | |
284 | ||
285 | /* bits indicating OUT fifo has data ready */ | |
286 | #define RX_DATA_READY (AT91_UDP_RX_DATA_BK0 | AT91_UDP_RX_DATA_BK1) | |
287 | ||
288 | /* | |
289 | * Endpoint FIFO CSR bits have a mix of bits, making it unsafe to just write | |
290 | * back most of the value you just read (because of side effects, including | |
291 | * bits that may change after reading and before writing). | |
292 | * | |
293 | * Except when changing a specific bit, always write values which: | |
294 | * - clear SET_FX bits (setting them could change something) | |
295 | * - set CLR_FX bits (clearing them could change something) | |
296 | * | |
297 | * There are also state bits like FORCESTALL, EPEDS, DIR, and EPTYPE | |
298 | * that shouldn't normally be changed. | |
8b2e7668 DB |
299 | * |
300 | * NOTE at91sam9260 docs mention synch between UDPCK and MCK clock domains, | |
301 | * implying a need to wait for one write to complete (test relevant bits) | |
302 | * before starting the next write. This shouldn't be an issue given how | |
303 | * infrequently we write, except maybe for write-then-read idioms. | |
bae4bd84 DB |
304 | */ |
305 | #define SET_FX (AT91_UDP_TXPKTRDY) | |
8b2e7668 DB |
306 | #define CLR_FX (RX_DATA_READY | AT91_UDP_RXSETUP \ |
307 | | AT91_UDP_STALLSENT | AT91_UDP_TXCOMP) | |
bae4bd84 DB |
308 | |
309 | /* pull OUT packet data from the endpoint's fifo */ | |
310 | static int read_fifo (struct at91_ep *ep, struct at91_request *req) | |
311 | { | |
312 | u32 __iomem *creg = ep->creg; | |
313 | u8 __iomem *dreg = ep->creg + (AT91_UDP_FDR(0) - AT91_UDP_CSR(0)); | |
314 | u32 csr; | |
315 | u8 *buf; | |
316 | unsigned int count, bufferspace, is_done; | |
317 | ||
318 | buf = req->req.buf + req->req.actual; | |
319 | bufferspace = req->req.length - req->req.actual; | |
320 | ||
321 | /* | |
322 | * there might be nothing to read if ep_queue() calls us, | |
323 | * or if we already emptied both pingpong buffers | |
324 | */ | |
325 | rescan: | |
326 | csr = __raw_readl(creg); | |
327 | if ((csr & RX_DATA_READY) == 0) | |
328 | return 0; | |
329 | ||
330 | count = (csr & AT91_UDP_RXBYTECNT) >> 16; | |
331 | if (count > ep->ep.maxpacket) | |
332 | count = ep->ep.maxpacket; | |
333 | if (count > bufferspace) { | |
334 | DBG("%s buffer overflow\n", ep->ep.name); | |
335 | req->req.status = -EOVERFLOW; | |
336 | count = bufferspace; | |
337 | } | |
338 | __raw_readsb(dreg, buf, count); | |
339 | ||
340 | /* release and swap pingpong mem bank */ | |
341 | csr |= CLR_FX; | |
342 | if (ep->is_pingpong) { | |
343 | if (ep->fifo_bank == 0) { | |
344 | csr &= ~(SET_FX | AT91_UDP_RX_DATA_BK0); | |
345 | ep->fifo_bank = 1; | |
346 | } else { | |
347 | csr &= ~(SET_FX | AT91_UDP_RX_DATA_BK1); | |
348 | ep->fifo_bank = 0; | |
349 | } | |
350 | } else | |
351 | csr &= ~(SET_FX | AT91_UDP_RX_DATA_BK0); | |
352 | __raw_writel(csr, creg); | |
353 | ||
354 | req->req.actual += count; | |
355 | is_done = (count < ep->ep.maxpacket); | |
356 | if (count == bufferspace) | |
357 | is_done = 1; | |
358 | ||
359 | PACKET("%s %p out/%d%s\n", ep->ep.name, &req->req, count, | |
360 | is_done ? " (done)" : ""); | |
361 | ||
362 | /* | |
363 | * avoid extra trips through IRQ logic for packets already in | |
364 | * the fifo ... maybe preventing an extra (expensive) OUT-NAK | |
365 | */ | |
366 | if (is_done) | |
367 | done(ep, req, 0); | |
368 | else if (ep->is_pingpong) { | |
76225374 HH |
369 | /* |
370 | * One dummy read to delay the code because of a HW glitch: | |
371 | * CSR returns bad RXCOUNT when read too soon after updating | |
372 | * RX_DATA_BK flags. | |
373 | */ | |
374 | csr = __raw_readl(creg); | |
375 | ||
bae4bd84 DB |
376 | bufferspace -= count; |
377 | buf += count; | |
378 | goto rescan; | |
379 | } | |
380 | ||
381 | return is_done; | |
382 | } | |
383 | ||
384 | /* load fifo for an IN packet */ | |
385 | static int write_fifo(struct at91_ep *ep, struct at91_request *req) | |
386 | { | |
387 | u32 __iomem *creg = ep->creg; | |
388 | u32 csr = __raw_readl(creg); | |
389 | u8 __iomem *dreg = ep->creg + (AT91_UDP_FDR(0) - AT91_UDP_CSR(0)); | |
390 | unsigned total, count, is_last; | |
3cf27234 | 391 | u8 *buf; |
bae4bd84 DB |
392 | |
393 | /* | |
394 | * TODO: allow for writing two packets to the fifo ... that'll | |
395 | * reduce the amount of IN-NAKing, but probably won't affect | |
396 | * throughput much. (Unlike preventing OUT-NAKing!) | |
397 | */ | |
398 | ||
399 | /* | |
400 | * If ep_queue() calls us, the queue is empty and possibly in | |
401 | * odd states like TXCOMP not yet cleared (we do it, saving at | |
402 | * least one IRQ) or the fifo not yet being free. Those aren't | |
403 | * issues normally (IRQ handler fast path). | |
404 | */ | |
405 | if (unlikely(csr & (AT91_UDP_TXCOMP | AT91_UDP_TXPKTRDY))) { | |
406 | if (csr & AT91_UDP_TXCOMP) { | |
407 | csr |= CLR_FX; | |
408 | csr &= ~(SET_FX | AT91_UDP_TXCOMP); | |
409 | __raw_writel(csr, creg); | |
410 | csr = __raw_readl(creg); | |
411 | } | |
412 | if (csr & AT91_UDP_TXPKTRDY) | |
413 | return 0; | |
414 | } | |
415 | ||
3cf27234 DB |
416 | buf = req->req.buf + req->req.actual; |
417 | prefetch(buf); | |
bae4bd84 DB |
418 | total = req->req.length - req->req.actual; |
419 | if (ep->ep.maxpacket < total) { | |
420 | count = ep->ep.maxpacket; | |
421 | is_last = 0; | |
422 | } else { | |
423 | count = total; | |
424 | is_last = (count < ep->ep.maxpacket) || !req->req.zero; | |
425 | } | |
426 | ||
427 | /* | |
428 | * Write the packet, maybe it's a ZLP. | |
429 | * | |
430 | * NOTE: incrementing req->actual before we receive the ACK means | |
431 | * gadget driver IN bytecounts can be wrong in fault cases. That's | |
432 | * fixable with PIO drivers like this one (save "count" here, and | |
433 | * do the increment later on TX irq), but not for most DMA hardware. | |
434 | * | |
435 | * So all gadget drivers must accept that potential error. Some | |
436 | * hardware supports precise fifo status reporting, letting them | |
437 | * recover when the actual bytecount matters (e.g. for USB Test | |
438 | * and Measurement Class devices). | |
439 | */ | |
3cf27234 | 440 | __raw_writesb(dreg, buf, count); |
bae4bd84 DB |
441 | csr &= ~SET_FX; |
442 | csr |= CLR_FX | AT91_UDP_TXPKTRDY; | |
443 | __raw_writel(csr, creg); | |
444 | req->req.actual += count; | |
445 | ||
446 | PACKET("%s %p in/%d%s\n", ep->ep.name, &req->req, count, | |
447 | is_last ? " (done)" : ""); | |
448 | if (is_last) | |
449 | done(ep, req, 0); | |
450 | return is_last; | |
451 | } | |
452 | ||
453 | static void nuke(struct at91_ep *ep, int status) | |
454 | { | |
455 | struct at91_request *req; | |
456 | ||
457 | // terminer chaque requete dans la queue | |
458 | ep->stopped = 1; | |
459 | if (list_empty(&ep->queue)) | |
460 | return; | |
461 | ||
441b62c1 | 462 | VDBG("%s %s\n", __func__, ep->ep.name); |
bae4bd84 DB |
463 | while (!list_empty(&ep->queue)) { |
464 | req = list_entry(ep->queue.next, struct at91_request, queue); | |
465 | done(ep, req, status); | |
466 | } | |
467 | } | |
468 | ||
469 | /*-------------------------------------------------------------------------*/ | |
470 | ||
8b2e7668 DB |
471 | static int at91_ep_enable(struct usb_ep *_ep, |
472 | const struct usb_endpoint_descriptor *desc) | |
bae4bd84 DB |
473 | { |
474 | struct at91_ep *ep = container_of(_ep, struct at91_ep, ep); | |
475 | struct at91_udc *dev = ep->udc; | |
476 | u16 maxpacket; | |
477 | u32 tmp; | |
478 | unsigned long flags; | |
479 | ||
480 | if (!_ep || !ep | |
481 | || !desc || ep->desc | |
482 | || _ep->name == ep0name | |
483 | || desc->bDescriptorType != USB_DT_ENDPOINT | |
484 | || (maxpacket = le16_to_cpu(desc->wMaxPacketSize)) == 0 | |
485 | || maxpacket > ep->maxpacket) { | |
486 | DBG("bad ep or descriptor\n"); | |
487 | return -EINVAL; | |
488 | } | |
489 | ||
490 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) { | |
491 | DBG("bogus device state\n"); | |
492 | return -ESHUTDOWN; | |
493 | } | |
494 | ||
81c8d8d2 | 495 | tmp = usb_endpoint_type(desc); |
bae4bd84 DB |
496 | switch (tmp) { |
497 | case USB_ENDPOINT_XFER_CONTROL: | |
498 | DBG("only one control endpoint\n"); | |
499 | return -EINVAL; | |
500 | case USB_ENDPOINT_XFER_INT: | |
501 | if (maxpacket > 64) | |
502 | goto bogus_max; | |
503 | break; | |
504 | case USB_ENDPOINT_XFER_BULK: | |
505 | switch (maxpacket) { | |
506 | case 8: | |
507 | case 16: | |
508 | case 32: | |
509 | case 64: | |
510 | goto ok; | |
511 | } | |
512 | bogus_max: | |
513 | DBG("bogus maxpacket %d\n", maxpacket); | |
514 | return -EINVAL; | |
515 | case USB_ENDPOINT_XFER_ISOC: | |
516 | if (!ep->is_pingpong) { | |
517 | DBG("iso requires double buffering\n"); | |
518 | return -EINVAL; | |
519 | } | |
520 | break; | |
521 | } | |
522 | ||
523 | ok: | |
524 | local_irq_save(flags); | |
525 | ||
526 | /* initialize endpoint to match this descriptor */ | |
81c8d8d2 | 527 | ep->is_in = usb_endpoint_dir_in(desc); |
bae4bd84 DB |
528 | ep->is_iso = (tmp == USB_ENDPOINT_XFER_ISOC); |
529 | ep->stopped = 0; | |
530 | if (ep->is_in) | |
531 | tmp |= 0x04; | |
532 | tmp <<= 8; | |
533 | tmp |= AT91_UDP_EPEDS; | |
534 | __raw_writel(tmp, ep->creg); | |
535 | ||
536 | ep->desc = desc; | |
537 | ep->ep.maxpacket = maxpacket; | |
538 | ||
539 | /* | |
540 | * reset/init endpoint fifo. NOTE: leaves fifo_bank alone, | |
541 | * since endpoint resets don't reset hw pingpong state. | |
542 | */ | |
ffd3326b AV |
543 | at91_udp_write(dev, AT91_UDP_RST_EP, ep->int_mask); |
544 | at91_udp_write(dev, AT91_UDP_RST_EP, 0); | |
bae4bd84 DB |
545 | |
546 | local_irq_restore(flags); | |
547 | return 0; | |
548 | } | |
549 | ||
550 | static int at91_ep_disable (struct usb_ep * _ep) | |
551 | { | |
552 | struct at91_ep *ep = container_of(_ep, struct at91_ep, ep); | |
ffd3326b | 553 | struct at91_udc *udc = ep->udc; |
bae4bd84 DB |
554 | unsigned long flags; |
555 | ||
556 | if (ep == &ep->udc->ep[0]) | |
557 | return -EINVAL; | |
558 | ||
559 | local_irq_save(flags); | |
560 | ||
561 | nuke(ep, -ESHUTDOWN); | |
562 | ||
563 | /* restore the endpoint's pristine config */ | |
564 | ep->desc = NULL; | |
565 | ep->ep.maxpacket = ep->maxpacket; | |
566 | ||
567 | /* reset fifos and endpoint */ | |
568 | if (ep->udc->clocked) { | |
ffd3326b AV |
569 | at91_udp_write(udc, AT91_UDP_RST_EP, ep->int_mask); |
570 | at91_udp_write(udc, AT91_UDP_RST_EP, 0); | |
bae4bd84 DB |
571 | __raw_writel(0, ep->creg); |
572 | } | |
573 | ||
574 | local_irq_restore(flags); | |
575 | return 0; | |
576 | } | |
577 | ||
578 | /* | |
579 | * this is a PIO-only driver, so there's nothing | |
580 | * interesting for request or buffer allocation. | |
581 | */ | |
582 | ||
8b2e7668 | 583 | static struct usb_request * |
f3db6e82 | 584 | at91_ep_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) |
bae4bd84 DB |
585 | { |
586 | struct at91_request *req; | |
587 | ||
cd861280 | 588 | req = kzalloc(sizeof (struct at91_request), gfp_flags); |
bae4bd84 DB |
589 | if (!req) |
590 | return NULL; | |
591 | ||
592 | INIT_LIST_HEAD(&req->queue); | |
593 | return &req->req; | |
594 | } | |
595 | ||
596 | static void at91_ep_free_request(struct usb_ep *_ep, struct usb_request *_req) | |
597 | { | |
598 | struct at91_request *req; | |
599 | ||
600 | req = container_of(_req, struct at91_request, req); | |
601 | BUG_ON(!list_empty(&req->queue)); | |
602 | kfree(req); | |
603 | } | |
604 | ||
bae4bd84 DB |
605 | static int at91_ep_queue(struct usb_ep *_ep, |
606 | struct usb_request *_req, gfp_t gfp_flags) | |
607 | { | |
608 | struct at91_request *req; | |
609 | struct at91_ep *ep; | |
610 | struct at91_udc *dev; | |
611 | int status; | |
612 | unsigned long flags; | |
613 | ||
614 | req = container_of(_req, struct at91_request, req); | |
615 | ep = container_of(_ep, struct at91_ep, ep); | |
616 | ||
617 | if (!_req || !_req->complete | |
618 | || !_req->buf || !list_empty(&req->queue)) { | |
619 | DBG("invalid request\n"); | |
620 | return -EINVAL; | |
621 | } | |
622 | ||
623 | if (!_ep || (!ep->desc && ep->ep.name != ep0name)) { | |
624 | DBG("invalid ep\n"); | |
625 | return -EINVAL; | |
626 | } | |
627 | ||
628 | dev = ep->udc; | |
629 | ||
630 | if (!dev || !dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) { | |
631 | DBG("invalid device\n"); | |
632 | return -EINVAL; | |
633 | } | |
634 | ||
635 | _req->status = -EINPROGRESS; | |
636 | _req->actual = 0; | |
637 | ||
638 | local_irq_save(flags); | |
639 | ||
640 | /* try to kickstart any empty and idle queue */ | |
641 | if (list_empty(&ep->queue) && !ep->stopped) { | |
642 | int is_ep0; | |
643 | ||
644 | /* | |
645 | * If this control request has a non-empty DATA stage, this | |
646 | * will start that stage. It works just like a non-control | |
647 | * request (until the status stage starts, maybe early). | |
648 | * | |
649 | * If the data stage is empty, then this starts a successful | |
650 | * IN/STATUS stage. (Unsuccessful ones use set_halt.) | |
651 | */ | |
652 | is_ep0 = (ep->ep.name == ep0name); | |
653 | if (is_ep0) { | |
654 | u32 tmp; | |
655 | ||
656 | if (!dev->req_pending) { | |
657 | status = -EINVAL; | |
658 | goto done; | |
659 | } | |
660 | ||
661 | /* | |
662 | * defer changing CONFG until after the gadget driver | |
663 | * reconfigures the endpoints. | |
664 | */ | |
665 | if (dev->wait_for_config_ack) { | |
ffd3326b | 666 | tmp = at91_udp_read(dev, AT91_UDP_GLB_STAT); |
bae4bd84 DB |
667 | tmp ^= AT91_UDP_CONFG; |
668 | VDBG("toggle config\n"); | |
ffd3326b | 669 | at91_udp_write(dev, AT91_UDP_GLB_STAT, tmp); |
bae4bd84 DB |
670 | } |
671 | if (req->req.length == 0) { | |
672 | ep0_in_status: | |
673 | PACKET("ep0 in/status\n"); | |
674 | status = 0; | |
675 | tmp = __raw_readl(ep->creg); | |
676 | tmp &= ~SET_FX; | |
677 | tmp |= CLR_FX | AT91_UDP_TXPKTRDY; | |
678 | __raw_writel(tmp, ep->creg); | |
679 | dev->req_pending = 0; | |
680 | goto done; | |
681 | } | |
682 | } | |
683 | ||
684 | if (ep->is_in) | |
685 | status = write_fifo(ep, req); | |
686 | else { | |
687 | status = read_fifo(ep, req); | |
688 | ||
689 | /* IN/STATUS stage is otherwise triggered by irq */ | |
690 | if (status && is_ep0) | |
691 | goto ep0_in_status; | |
692 | } | |
693 | } else | |
694 | status = 0; | |
695 | ||
696 | if (req && !status) { | |
697 | list_add_tail (&req->queue, &ep->queue); | |
ffd3326b | 698 | at91_udp_write(dev, AT91_UDP_IER, ep->int_mask); |
bae4bd84 DB |
699 | } |
700 | done: | |
701 | local_irq_restore(flags); | |
702 | return (status < 0) ? status : 0; | |
703 | } | |
704 | ||
705 | static int at91_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) | |
706 | { | |
707 | struct at91_ep *ep; | |
708 | struct at91_request *req; | |
709 | ||
710 | ep = container_of(_ep, struct at91_ep, ep); | |
711 | if (!_ep || ep->ep.name == ep0name) | |
712 | return -EINVAL; | |
713 | ||
714 | /* make sure it's actually queued on this endpoint */ | |
715 | list_for_each_entry (req, &ep->queue, queue) { | |
716 | if (&req->req == _req) | |
717 | break; | |
718 | } | |
719 | if (&req->req != _req) | |
720 | return -EINVAL; | |
721 | ||
722 | done(ep, req, -ECONNRESET); | |
723 | return 0; | |
724 | } | |
725 | ||
726 | static int at91_ep_set_halt(struct usb_ep *_ep, int value) | |
727 | { | |
728 | struct at91_ep *ep = container_of(_ep, struct at91_ep, ep); | |
ffd3326b | 729 | struct at91_udc *udc = ep->udc; |
bae4bd84 DB |
730 | u32 __iomem *creg; |
731 | u32 csr; | |
732 | unsigned long flags; | |
733 | int status = 0; | |
734 | ||
735 | if (!_ep || ep->is_iso || !ep->udc->clocked) | |
736 | return -EINVAL; | |
737 | ||
738 | creg = ep->creg; | |
739 | local_irq_save(flags); | |
740 | ||
741 | csr = __raw_readl(creg); | |
742 | ||
743 | /* | |
744 | * fail with still-busy IN endpoints, ensuring correct sequencing | |
745 | * of data tx then stall. note that the fifo rx bytecount isn't | |
746 | * completely accurate as a tx bytecount. | |
747 | */ | |
748 | if (ep->is_in && (!list_empty(&ep->queue) || (csr >> 16) != 0)) | |
749 | status = -EAGAIN; | |
750 | else { | |
751 | csr |= CLR_FX; | |
752 | csr &= ~SET_FX; | |
753 | if (value) { | |
754 | csr |= AT91_UDP_FORCESTALL; | |
755 | VDBG("halt %s\n", ep->ep.name); | |
756 | } else { | |
ffd3326b AV |
757 | at91_udp_write(udc, AT91_UDP_RST_EP, ep->int_mask); |
758 | at91_udp_write(udc, AT91_UDP_RST_EP, 0); | |
bae4bd84 DB |
759 | csr &= ~AT91_UDP_FORCESTALL; |
760 | } | |
761 | __raw_writel(csr, creg); | |
762 | } | |
763 | ||
764 | local_irq_restore(flags); | |
765 | return status; | |
766 | } | |
767 | ||
398acce7 | 768 | static const struct usb_ep_ops at91_ep_ops = { |
bae4bd84 DB |
769 | .enable = at91_ep_enable, |
770 | .disable = at91_ep_disable, | |
771 | .alloc_request = at91_ep_alloc_request, | |
772 | .free_request = at91_ep_free_request, | |
bae4bd84 DB |
773 | .queue = at91_ep_queue, |
774 | .dequeue = at91_ep_dequeue, | |
775 | .set_halt = at91_ep_set_halt, | |
776 | // there's only imprecise fifo status reporting | |
777 | }; | |
778 | ||
779 | /*-------------------------------------------------------------------------*/ | |
780 | ||
781 | static int at91_get_frame(struct usb_gadget *gadget) | |
782 | { | |
ffd3326b AV |
783 | struct at91_udc *udc = to_udc(gadget); |
784 | ||
bae4bd84 DB |
785 | if (!to_udc(gadget)->clocked) |
786 | return -EINVAL; | |
ffd3326b | 787 | return at91_udp_read(udc, AT91_UDP_FRM_NUM) & AT91_UDP_NUM; |
bae4bd84 DB |
788 | } |
789 | ||
790 | static int at91_wakeup(struct usb_gadget *gadget) | |
791 | { | |
792 | struct at91_udc *udc = to_udc(gadget); | |
793 | u32 glbstate; | |
794 | int status = -EINVAL; | |
795 | unsigned long flags; | |
796 | ||
441b62c1 | 797 | DBG("%s\n", __func__ ); |
bae4bd84 DB |
798 | local_irq_save(flags); |
799 | ||
800 | if (!udc->clocked || !udc->suspended) | |
801 | goto done; | |
802 | ||
803 | /* NOTE: some "early versions" handle ESR differently ... */ | |
804 | ||
ffd3326b | 805 | glbstate = at91_udp_read(udc, AT91_UDP_GLB_STAT); |
bae4bd84 DB |
806 | if (!(glbstate & AT91_UDP_ESR)) |
807 | goto done; | |
808 | glbstate |= AT91_UDP_ESR; | |
ffd3326b | 809 | at91_udp_write(udc, AT91_UDP_GLB_STAT, glbstate); |
bae4bd84 DB |
810 | |
811 | done: | |
812 | local_irq_restore(flags); | |
813 | return status; | |
814 | } | |
815 | ||
816 | /* reinit == restore inital software state */ | |
817 | static void udc_reinit(struct at91_udc *udc) | |
818 | { | |
819 | u32 i; | |
820 | ||
821 | INIT_LIST_HEAD(&udc->gadget.ep_list); | |
822 | INIT_LIST_HEAD(&udc->gadget.ep0->ep_list); | |
823 | ||
824 | for (i = 0; i < NUM_ENDPOINTS; i++) { | |
825 | struct at91_ep *ep = &udc->ep[i]; | |
826 | ||
827 | if (i != 0) | |
828 | list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list); | |
829 | ep->desc = NULL; | |
830 | ep->stopped = 0; | |
831 | ep->fifo_bank = 0; | |
832 | ep->ep.maxpacket = ep->maxpacket; | |
ffd3326b | 833 | ep->creg = (void __iomem *) udc->udp_baseaddr + AT91_UDP_CSR(i); |
bae4bd84 DB |
834 | // initialiser une queue par endpoint |
835 | INIT_LIST_HEAD(&ep->queue); | |
836 | } | |
837 | } | |
838 | ||
839 | static void stop_activity(struct at91_udc *udc) | |
840 | { | |
841 | struct usb_gadget_driver *driver = udc->driver; | |
842 | int i; | |
843 | ||
844 | if (udc->gadget.speed == USB_SPEED_UNKNOWN) | |
845 | driver = NULL; | |
846 | udc->gadget.speed = USB_SPEED_UNKNOWN; | |
8b2e7668 | 847 | udc->suspended = 0; |
bae4bd84 DB |
848 | |
849 | for (i = 0; i < NUM_ENDPOINTS; i++) { | |
850 | struct at91_ep *ep = &udc->ep[i]; | |
851 | ep->stopped = 1; | |
852 | nuke(ep, -ESHUTDOWN); | |
853 | } | |
854 | if (driver) | |
855 | driver->disconnect(&udc->gadget); | |
856 | ||
857 | udc_reinit(udc); | |
858 | } | |
859 | ||
860 | static void clk_on(struct at91_udc *udc) | |
861 | { | |
862 | if (udc->clocked) | |
863 | return; | |
864 | udc->clocked = 1; | |
865 | clk_enable(udc->iclk); | |
866 | clk_enable(udc->fclk); | |
867 | } | |
868 | ||
869 | static void clk_off(struct at91_udc *udc) | |
870 | { | |
871 | if (!udc->clocked) | |
872 | return; | |
873 | udc->clocked = 0; | |
874 | udc->gadget.speed = USB_SPEED_UNKNOWN; | |
bae4bd84 | 875 | clk_disable(udc->fclk); |
8b2e7668 | 876 | clk_disable(udc->iclk); |
bae4bd84 DB |
877 | } |
878 | ||
879 | /* | |
880 | * activate/deactivate link with host; minimize power usage for | |
881 | * inactive links by cutting clocks and transceiver power. | |
882 | */ | |
883 | static void pullup(struct at91_udc *udc, int is_on) | |
884 | { | |
f3db6e82 DB |
885 | int active = !udc->board.pullup_active_low; |
886 | ||
bae4bd84 DB |
887 | if (!udc->enabled || !udc->vbus) |
888 | is_on = 0; | |
889 | DBG("%sactive\n", is_on ? "" : "in"); | |
ffd3326b | 890 | |
bae4bd84 DB |
891 | if (is_on) { |
892 | clk_on(udc); | |
08cbc706 | 893 | at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_RXRSM); |
ffd3326b | 894 | at91_udp_write(udc, AT91_UDP_TXVC, 0); |
29ba4b53 | 895 | if (cpu_is_at91rm9200()) |
f3db6e82 | 896 | gpio_set_value(udc->board.pullup_pin, active); |
61352667 | 897 | else if (cpu_is_at91sam9260() || cpu_is_at91sam9263() || cpu_is_at91sam9g20()) { |
29ba4b53 AV |
898 | u32 txvc = at91_udp_read(udc, AT91_UDP_TXVC); |
899 | ||
900 | txvc |= AT91_UDP_TXVC_PUON; | |
901 | at91_udp_write(udc, AT91_UDP_TXVC, txvc); | |
23f6d914 | 902 | } else if (cpu_is_at91sam9261() || cpu_is_at91sam9g10()) { |
29ba4b53 AV |
903 | u32 usbpucr; |
904 | ||
905 | usbpucr = at91_sys_read(AT91_MATRIX_USBPUCR); | |
906 | usbpucr |= AT91_MATRIX_USBPUCR_PUON; | |
907 | at91_sys_write(AT91_MATRIX_USBPUCR, usbpucr); | |
908 | } | |
ffd3326b | 909 | } else { |
bae4bd84 | 910 | stop_activity(udc); |
08cbc706 | 911 | at91_udp_write(udc, AT91_UDP_IDR, AT91_UDP_RXRSM); |
ffd3326b | 912 | at91_udp_write(udc, AT91_UDP_TXVC, AT91_UDP_TXVC_TXVDIS); |
29ba4b53 | 913 | if (cpu_is_at91rm9200()) |
f3db6e82 | 914 | gpio_set_value(udc->board.pullup_pin, !active); |
61352667 | 915 | else if (cpu_is_at91sam9260() || cpu_is_at91sam9263() || cpu_is_at91sam9g20()) { |
29ba4b53 AV |
916 | u32 txvc = at91_udp_read(udc, AT91_UDP_TXVC); |
917 | ||
918 | txvc &= ~AT91_UDP_TXVC_PUON; | |
919 | at91_udp_write(udc, AT91_UDP_TXVC, txvc); | |
23f6d914 | 920 | } else if (cpu_is_at91sam9261() || cpu_is_at91sam9g10()) { |
29ba4b53 AV |
921 | u32 usbpucr; |
922 | ||
923 | usbpucr = at91_sys_read(AT91_MATRIX_USBPUCR); | |
924 | usbpucr &= ~AT91_MATRIX_USBPUCR_PUON; | |
925 | at91_sys_write(AT91_MATRIX_USBPUCR, usbpucr); | |
926 | } | |
bae4bd84 | 927 | clk_off(udc); |
bae4bd84 DB |
928 | } |
929 | } | |
930 | ||
931 | /* vbus is here! turn everything on that's ready */ | |
932 | static int at91_vbus_session(struct usb_gadget *gadget, int is_active) | |
933 | { | |
934 | struct at91_udc *udc = to_udc(gadget); | |
935 | unsigned long flags; | |
936 | ||
937 | // VDBG("vbus %s\n", is_active ? "on" : "off"); | |
938 | local_irq_save(flags); | |
939 | udc->vbus = (is_active != 0); | |
bfb7fb79 WK |
940 | if (udc->driver) |
941 | pullup(udc, is_active); | |
942 | else | |
943 | pullup(udc, 0); | |
bae4bd84 DB |
944 | local_irq_restore(flags); |
945 | return 0; | |
946 | } | |
947 | ||
948 | static int at91_pullup(struct usb_gadget *gadget, int is_on) | |
949 | { | |
950 | struct at91_udc *udc = to_udc(gadget); | |
951 | unsigned long flags; | |
952 | ||
953 | local_irq_save(flags); | |
954 | udc->enabled = is_on = !!is_on; | |
955 | pullup(udc, is_on); | |
956 | local_irq_restore(flags); | |
957 | return 0; | |
958 | } | |
959 | ||
960 | static int at91_set_selfpowered(struct usb_gadget *gadget, int is_on) | |
961 | { | |
962 | struct at91_udc *udc = to_udc(gadget); | |
963 | unsigned long flags; | |
964 | ||
965 | local_irq_save(flags); | |
966 | udc->selfpowered = (is_on != 0); | |
967 | local_irq_restore(flags); | |
968 | return 0; | |
969 | } | |
970 | ||
971 | static const struct usb_gadget_ops at91_udc_ops = { | |
972 | .get_frame = at91_get_frame, | |
973 | .wakeup = at91_wakeup, | |
974 | .set_selfpowered = at91_set_selfpowered, | |
975 | .vbus_session = at91_vbus_session, | |
976 | .pullup = at91_pullup, | |
977 | ||
978 | /* | |
979 | * VBUS-powered devices may also also want to support bigger | |
980 | * power budgets after an appropriate SET_CONFIGURATION. | |
981 | */ | |
982 | // .vbus_power = at91_vbus_power, | |
983 | }; | |
984 | ||
985 | /*-------------------------------------------------------------------------*/ | |
986 | ||
987 | static int handle_ep(struct at91_ep *ep) | |
988 | { | |
989 | struct at91_request *req; | |
990 | u32 __iomem *creg = ep->creg; | |
991 | u32 csr = __raw_readl(creg); | |
992 | ||
993 | if (!list_empty(&ep->queue)) | |
994 | req = list_entry(ep->queue.next, | |
995 | struct at91_request, queue); | |
996 | else | |
997 | req = NULL; | |
998 | ||
999 | if (ep->is_in) { | |
1000 | if (csr & (AT91_UDP_STALLSENT | AT91_UDP_TXCOMP)) { | |
1001 | csr |= CLR_FX; | |
1002 | csr &= ~(SET_FX | AT91_UDP_STALLSENT | AT91_UDP_TXCOMP); | |
1003 | __raw_writel(csr, creg); | |
1004 | } | |
1005 | if (req) | |
1006 | return write_fifo(ep, req); | |
1007 | ||
1008 | } else { | |
1009 | if (csr & AT91_UDP_STALLSENT) { | |
1010 | /* STALLSENT bit == ISOERR */ | |
1011 | if (ep->is_iso && req) | |
1012 | req->req.status = -EILSEQ; | |
1013 | csr |= CLR_FX; | |
1014 | csr &= ~(SET_FX | AT91_UDP_STALLSENT); | |
1015 | __raw_writel(csr, creg); | |
1016 | csr = __raw_readl(creg); | |
1017 | } | |
1018 | if (req && (csr & RX_DATA_READY)) | |
1019 | return read_fifo(ep, req); | |
1020 | } | |
1021 | return 0; | |
1022 | } | |
1023 | ||
1024 | union setup { | |
1025 | u8 raw[8]; | |
1026 | struct usb_ctrlrequest r; | |
1027 | }; | |
1028 | ||
1029 | static void handle_setup(struct at91_udc *udc, struct at91_ep *ep, u32 csr) | |
1030 | { | |
1031 | u32 __iomem *creg = ep->creg; | |
1032 | u8 __iomem *dreg = ep->creg + (AT91_UDP_FDR(0) - AT91_UDP_CSR(0)); | |
1033 | unsigned rxcount, i = 0; | |
1034 | u32 tmp; | |
1035 | union setup pkt; | |
1036 | int status = 0; | |
1037 | ||
1038 | /* read and ack SETUP; hard-fail for bogus packets */ | |
1039 | rxcount = (csr & AT91_UDP_RXBYTECNT) >> 16; | |
1040 | if (likely(rxcount == 8)) { | |
1041 | while (rxcount--) | |
1042 | pkt.raw[i++] = __raw_readb(dreg); | |
1043 | if (pkt.r.bRequestType & USB_DIR_IN) { | |
1044 | csr |= AT91_UDP_DIR; | |
1045 | ep->is_in = 1; | |
1046 | } else { | |
1047 | csr &= ~AT91_UDP_DIR; | |
1048 | ep->is_in = 0; | |
1049 | } | |
1050 | } else { | |
1051 | // REVISIT this happens sometimes under load; why?? | |
1052 | ERR("SETUP len %d, csr %08x\n", rxcount, csr); | |
1053 | status = -EINVAL; | |
1054 | } | |
1055 | csr |= CLR_FX; | |
1056 | csr &= ~(SET_FX | AT91_UDP_RXSETUP); | |
1057 | __raw_writel(csr, creg); | |
1058 | udc->wait_for_addr_ack = 0; | |
1059 | udc->wait_for_config_ack = 0; | |
1060 | ep->stopped = 0; | |
1061 | if (unlikely(status != 0)) | |
1062 | goto stall; | |
1063 | ||
1064 | #define w_index le16_to_cpu(pkt.r.wIndex) | |
1065 | #define w_value le16_to_cpu(pkt.r.wValue) | |
1066 | #define w_length le16_to_cpu(pkt.r.wLength) | |
1067 | ||
1068 | VDBG("SETUP %02x.%02x v%04x i%04x l%04x\n", | |
1069 | pkt.r.bRequestType, pkt.r.bRequest, | |
1070 | w_value, w_index, w_length); | |
1071 | ||
1072 | /* | |
1073 | * A few standard requests get handled here, ones that touch | |
1074 | * hardware ... notably for device and endpoint features. | |
1075 | */ | |
1076 | udc->req_pending = 1; | |
1077 | csr = __raw_readl(creg); | |
1078 | csr |= CLR_FX; | |
1079 | csr &= ~SET_FX; | |
1080 | switch ((pkt.r.bRequestType << 8) | pkt.r.bRequest) { | |
1081 | ||
1082 | case ((USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8) | |
1083 | | USB_REQ_SET_ADDRESS: | |
1084 | __raw_writel(csr | AT91_UDP_TXPKTRDY, creg); | |
1085 | udc->addr = w_value; | |
1086 | udc->wait_for_addr_ack = 1; | |
1087 | udc->req_pending = 0; | |
1088 | /* FADDR is set later, when we ack host STATUS */ | |
1089 | return; | |
1090 | ||
1091 | case ((USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8) | |
1092 | | USB_REQ_SET_CONFIGURATION: | |
ffd3326b | 1093 | tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT) & AT91_UDP_CONFG; |
bae4bd84 DB |
1094 | if (pkt.r.wValue) |
1095 | udc->wait_for_config_ack = (tmp == 0); | |
1096 | else | |
1097 | udc->wait_for_config_ack = (tmp != 0); | |
1098 | if (udc->wait_for_config_ack) | |
1099 | VDBG("wait for config\n"); | |
1100 | /* CONFG is toggled later, if gadget driver succeeds */ | |
1101 | break; | |
1102 | ||
1103 | /* | |
1104 | * Hosts may set or clear remote wakeup status, and | |
1105 | * devices may report they're VBUS powered. | |
1106 | */ | |
1107 | case ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8) | |
1108 | | USB_REQ_GET_STATUS: | |
1109 | tmp = (udc->selfpowered << USB_DEVICE_SELF_POWERED); | |
ffd3326b | 1110 | if (at91_udp_read(udc, AT91_UDP_GLB_STAT) & AT91_UDP_ESR) |
bae4bd84 DB |
1111 | tmp |= (1 << USB_DEVICE_REMOTE_WAKEUP); |
1112 | PACKET("get device status\n"); | |
1113 | __raw_writeb(tmp, dreg); | |
1114 | __raw_writeb(0, dreg); | |
1115 | goto write_in; | |
1116 | /* then STATUS starts later, automatically */ | |
1117 | case ((USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8) | |
1118 | | USB_REQ_SET_FEATURE: | |
1119 | if (w_value != USB_DEVICE_REMOTE_WAKEUP) | |
1120 | goto stall; | |
ffd3326b | 1121 | tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT); |
bae4bd84 | 1122 | tmp |= AT91_UDP_ESR; |
ffd3326b | 1123 | at91_udp_write(udc, AT91_UDP_GLB_STAT, tmp); |
bae4bd84 DB |
1124 | goto succeed; |
1125 | case ((USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8) | |
1126 | | USB_REQ_CLEAR_FEATURE: | |
1127 | if (w_value != USB_DEVICE_REMOTE_WAKEUP) | |
1128 | goto stall; | |
ffd3326b | 1129 | tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT); |
bae4bd84 | 1130 | tmp &= ~AT91_UDP_ESR; |
ffd3326b | 1131 | at91_udp_write(udc, AT91_UDP_GLB_STAT, tmp); |
bae4bd84 DB |
1132 | goto succeed; |
1133 | ||
1134 | /* | |
1135 | * Interfaces have no feature settings; this is pretty useless. | |
1136 | * we won't even insist the interface exists... | |
1137 | */ | |
1138 | case ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE) << 8) | |
1139 | | USB_REQ_GET_STATUS: | |
1140 | PACKET("get interface status\n"); | |
1141 | __raw_writeb(0, dreg); | |
1142 | __raw_writeb(0, dreg); | |
1143 | goto write_in; | |
1144 | /* then STATUS starts later, automatically */ | |
1145 | case ((USB_TYPE_STANDARD|USB_RECIP_INTERFACE) << 8) | |
1146 | | USB_REQ_SET_FEATURE: | |
1147 | case ((USB_TYPE_STANDARD|USB_RECIP_INTERFACE) << 8) | |
1148 | | USB_REQ_CLEAR_FEATURE: | |
1149 | goto stall; | |
1150 | ||
1151 | /* | |
1152 | * Hosts may clear bulk/intr endpoint halt after the gadget | |
1153 | * driver sets it (not widely used); or set it (for testing) | |
1154 | */ | |
1155 | case ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_ENDPOINT) << 8) | |
1156 | | USB_REQ_GET_STATUS: | |
1157 | tmp = w_index & USB_ENDPOINT_NUMBER_MASK; | |
1158 | ep = &udc->ep[tmp]; | |
1440e096 | 1159 | if (tmp >= NUM_ENDPOINTS || (tmp && !ep->desc)) |
bae4bd84 DB |
1160 | goto stall; |
1161 | ||
1162 | if (tmp) { | |
1163 | if ((w_index & USB_DIR_IN)) { | |
1164 | if (!ep->is_in) | |
1165 | goto stall; | |
1166 | } else if (ep->is_in) | |
1167 | goto stall; | |
1168 | } | |
1169 | PACKET("get %s status\n", ep->ep.name); | |
1170 | if (__raw_readl(ep->creg) & AT91_UDP_FORCESTALL) | |
1171 | tmp = (1 << USB_ENDPOINT_HALT); | |
1172 | else | |
1173 | tmp = 0; | |
1174 | __raw_writeb(tmp, dreg); | |
1175 | __raw_writeb(0, dreg); | |
1176 | goto write_in; | |
1177 | /* then STATUS starts later, automatically */ | |
1178 | case ((USB_TYPE_STANDARD|USB_RECIP_ENDPOINT) << 8) | |
1179 | | USB_REQ_SET_FEATURE: | |
1180 | tmp = w_index & USB_ENDPOINT_NUMBER_MASK; | |
1181 | ep = &udc->ep[tmp]; | |
1440e096 | 1182 | if (w_value != USB_ENDPOINT_HALT || tmp >= NUM_ENDPOINTS) |
bae4bd84 DB |
1183 | goto stall; |
1184 | if (!ep->desc || ep->is_iso) | |
1185 | goto stall; | |
1186 | if ((w_index & USB_DIR_IN)) { | |
1187 | if (!ep->is_in) | |
1188 | goto stall; | |
1189 | } else if (ep->is_in) | |
1190 | goto stall; | |
1191 | ||
1192 | tmp = __raw_readl(ep->creg); | |
1193 | tmp &= ~SET_FX; | |
1194 | tmp |= CLR_FX | AT91_UDP_FORCESTALL; | |
1195 | __raw_writel(tmp, ep->creg); | |
1196 | goto succeed; | |
1197 | case ((USB_TYPE_STANDARD|USB_RECIP_ENDPOINT) << 8) | |
1198 | | USB_REQ_CLEAR_FEATURE: | |
1199 | tmp = w_index & USB_ENDPOINT_NUMBER_MASK; | |
1200 | ep = &udc->ep[tmp]; | |
1440e096 | 1201 | if (w_value != USB_ENDPOINT_HALT || tmp >= NUM_ENDPOINTS) |
bae4bd84 DB |
1202 | goto stall; |
1203 | if (tmp == 0) | |
1204 | goto succeed; | |
1205 | if (!ep->desc || ep->is_iso) | |
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 | ||
ffd3326b AV |
1213 | at91_udp_write(udc, AT91_UDP_RST_EP, ep->int_mask); |
1214 | at91_udp_write(udc, AT91_UDP_RST_EP, 0); | |
bae4bd84 DB |
1215 | tmp = __raw_readl(ep->creg); |
1216 | tmp |= CLR_FX; | |
1217 | tmp &= ~(SET_FX | AT91_UDP_FORCESTALL); | |
1218 | __raw_writel(tmp, ep->creg); | |
1219 | if (!list_empty(&ep->queue)) | |
1220 | handle_ep(ep); | |
1221 | goto succeed; | |
1222 | } | |
1223 | ||
1224 | #undef w_value | |
1225 | #undef w_index | |
1226 | #undef w_length | |
1227 | ||
1228 | /* pass request up to the gadget driver */ | |
bfb7fb79 WK |
1229 | if (udc->driver) |
1230 | status = udc->driver->setup(&udc->gadget, &pkt.r); | |
1231 | else | |
1232 | status = -ENODEV; | |
bae4bd84 DB |
1233 | if (status < 0) { |
1234 | stall: | |
1235 | VDBG("req %02x.%02x protocol STALL; stat %d\n", | |
1236 | pkt.r.bRequestType, pkt.r.bRequest, status); | |
1237 | csr |= AT91_UDP_FORCESTALL; | |
1238 | __raw_writel(csr, creg); | |
1239 | udc->req_pending = 0; | |
1240 | } | |
1241 | return; | |
1242 | ||
1243 | succeed: | |
1244 | /* immediate successful (IN) STATUS after zero length DATA */ | |
1245 | PACKET("ep0 in/status\n"); | |
1246 | write_in: | |
1247 | csr |= AT91_UDP_TXPKTRDY; | |
1248 | __raw_writel(csr, creg); | |
1249 | udc->req_pending = 0; | |
1250 | return; | |
1251 | } | |
1252 | ||
1253 | static void handle_ep0(struct at91_udc *udc) | |
1254 | { | |
1255 | struct at91_ep *ep0 = &udc->ep[0]; | |
1256 | u32 __iomem *creg = ep0->creg; | |
1257 | u32 csr = __raw_readl(creg); | |
1258 | struct at91_request *req; | |
1259 | ||
1260 | if (unlikely(csr & AT91_UDP_STALLSENT)) { | |
1261 | nuke(ep0, -EPROTO); | |
1262 | udc->req_pending = 0; | |
1263 | csr |= CLR_FX; | |
1264 | csr &= ~(SET_FX | AT91_UDP_STALLSENT | AT91_UDP_FORCESTALL); | |
1265 | __raw_writel(csr, creg); | |
1266 | VDBG("ep0 stalled\n"); | |
1267 | csr = __raw_readl(creg); | |
1268 | } | |
1269 | if (csr & AT91_UDP_RXSETUP) { | |
1270 | nuke(ep0, 0); | |
1271 | udc->req_pending = 0; | |
1272 | handle_setup(udc, ep0, csr); | |
1273 | return; | |
1274 | } | |
1275 | ||
1276 | if (list_empty(&ep0->queue)) | |
1277 | req = NULL; | |
1278 | else | |
1279 | req = list_entry(ep0->queue.next, struct at91_request, queue); | |
1280 | ||
1281 | /* host ACKed an IN packet that we sent */ | |
1282 | if (csr & AT91_UDP_TXCOMP) { | |
1283 | csr |= CLR_FX; | |
1284 | csr &= ~(SET_FX | AT91_UDP_TXCOMP); | |
1285 | ||
1286 | /* write more IN DATA? */ | |
1287 | if (req && ep0->is_in) { | |
1288 | if (handle_ep(ep0)) | |
1289 | udc->req_pending = 0; | |
1290 | ||
1291 | /* | |
1292 | * Ack after: | |
1293 | * - last IN DATA packet (including GET_STATUS) | |
1294 | * - IN/STATUS for OUT DATA | |
1295 | * - IN/STATUS for any zero-length DATA stage | |
1296 | * except for the IN DATA case, the host should send | |
1297 | * an OUT status later, which we'll ack. | |
1298 | */ | |
1299 | } else { | |
1300 | udc->req_pending = 0; | |
1301 | __raw_writel(csr, creg); | |
1302 | ||
1303 | /* | |
1304 | * SET_ADDRESS takes effect only after the STATUS | |
1305 | * (to the original address) gets acked. | |
1306 | */ | |
1307 | if (udc->wait_for_addr_ack) { | |
1308 | u32 tmp; | |
1309 | ||
ffd3326b | 1310 | at91_udp_write(udc, AT91_UDP_FADDR, |
8b2e7668 | 1311 | AT91_UDP_FEN | udc->addr); |
ffd3326b | 1312 | tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT); |
bae4bd84 DB |
1313 | tmp &= ~AT91_UDP_FADDEN; |
1314 | if (udc->addr) | |
1315 | tmp |= AT91_UDP_FADDEN; | |
ffd3326b | 1316 | at91_udp_write(udc, AT91_UDP_GLB_STAT, tmp); |
bae4bd84 DB |
1317 | |
1318 | udc->wait_for_addr_ack = 0; | |
1319 | VDBG("address %d\n", udc->addr); | |
1320 | } | |
1321 | } | |
1322 | } | |
1323 | ||
1324 | /* OUT packet arrived ... */ | |
1325 | else if (csr & AT91_UDP_RX_DATA_BK0) { | |
1326 | csr |= CLR_FX; | |
1327 | csr &= ~(SET_FX | AT91_UDP_RX_DATA_BK0); | |
1328 | ||
1329 | /* OUT DATA stage */ | |
1330 | if (!ep0->is_in) { | |
1331 | if (req) { | |
1332 | if (handle_ep(ep0)) { | |
1333 | /* send IN/STATUS */ | |
1334 | PACKET("ep0 in/status\n"); | |
1335 | csr = __raw_readl(creg); | |
1336 | csr &= ~SET_FX; | |
1337 | csr |= CLR_FX | AT91_UDP_TXPKTRDY; | |
1338 | __raw_writel(csr, creg); | |
1339 | udc->req_pending = 0; | |
1340 | } | |
1341 | } else if (udc->req_pending) { | |
1342 | /* | |
1343 | * AT91 hardware has a hard time with this | |
1344 | * "deferred response" mode for control-OUT | |
1345 | * transfers. (For control-IN it's fine.) | |
1346 | * | |
1347 | * The normal solution leaves OUT data in the | |
1348 | * fifo until the gadget driver is ready. | |
1349 | * We couldn't do that here without disabling | |
1350 | * the IRQ that tells about SETUP packets, | |
1351 | * e.g. when the host gets impatient... | |
1352 | * | |
1353 | * Working around it by copying into a buffer | |
1354 | * would almost be a non-deferred response, | |
1355 | * except that it wouldn't permit reliable | |
1356 | * stalling of the request. Instead, demand | |
1357 | * that gadget drivers not use this mode. | |
1358 | */ | |
1359 | DBG("no control-OUT deferred responses!\n"); | |
1360 | __raw_writel(csr | AT91_UDP_FORCESTALL, creg); | |
1361 | udc->req_pending = 0; | |
1362 | } | |
1363 | ||
1364 | /* STATUS stage for control-IN; ack. */ | |
1365 | } else { | |
1366 | PACKET("ep0 out/status ACK\n"); | |
1367 | __raw_writel(csr, creg); | |
1368 | ||
1369 | /* "early" status stage */ | |
1370 | if (req) | |
1371 | done(ep0, req, 0); | |
1372 | } | |
1373 | } | |
1374 | } | |
1375 | ||
7d12e780 | 1376 | static irqreturn_t at91_udc_irq (int irq, void *_udc) |
bae4bd84 DB |
1377 | { |
1378 | struct at91_udc *udc = _udc; | |
1379 | u32 rescans = 5; | |
c6c35237 HH |
1380 | int disable_clock = 0; |
1381 | ||
1382 | if (!udc->clocked) { | |
1383 | clk_on(udc); | |
1384 | disable_clock = 1; | |
1385 | } | |
bae4bd84 DB |
1386 | |
1387 | while (rescans--) { | |
8b2e7668 | 1388 | u32 status; |
bae4bd84 | 1389 | |
ffd3326b AV |
1390 | status = at91_udp_read(udc, AT91_UDP_ISR) |
1391 | & at91_udp_read(udc, AT91_UDP_IMR); | |
bae4bd84 DB |
1392 | if (!status) |
1393 | break; | |
1394 | ||
1395 | /* USB reset irq: not maskable */ | |
1396 | if (status & AT91_UDP_ENDBUSRES) { | |
ffd3326b AV |
1397 | at91_udp_write(udc, AT91_UDP_IDR, ~MINIMUS_INTERRUPTUS); |
1398 | at91_udp_write(udc, AT91_UDP_IER, MINIMUS_INTERRUPTUS); | |
bae4bd84 | 1399 | /* Atmel code clears this irq twice */ |
ffd3326b AV |
1400 | at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_ENDBUSRES); |
1401 | at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_ENDBUSRES); | |
bae4bd84 DB |
1402 | VDBG("end bus reset\n"); |
1403 | udc->addr = 0; | |
1404 | stop_activity(udc); | |
1405 | ||
1406 | /* enable ep0 */ | |
ffd3326b | 1407 | at91_udp_write(udc, AT91_UDP_CSR(0), |
8b2e7668 | 1408 | AT91_UDP_EPEDS | AT91_UDP_EPTYPE_CTRL); |
bae4bd84 DB |
1409 | udc->gadget.speed = USB_SPEED_FULL; |
1410 | udc->suspended = 0; | |
ffd3326b | 1411 | at91_udp_write(udc, AT91_UDP_IER, AT91_UDP_EP(0)); |
bae4bd84 DB |
1412 | |
1413 | /* | |
1414 | * NOTE: this driver keeps clocks off unless the | |
8b2e7668 DB |
1415 | * USB host is present. That saves power, but for |
1416 | * boards that don't support VBUS detection, both | |
1417 | * clocks need to be active most of the time. | |
bae4bd84 DB |
1418 | */ |
1419 | ||
1420 | /* host initiated suspend (3+ms bus idle) */ | |
1421 | } else if (status & AT91_UDP_RXSUSP) { | |
ffd3326b AV |
1422 | at91_udp_write(udc, AT91_UDP_IDR, AT91_UDP_RXSUSP); |
1423 | at91_udp_write(udc, AT91_UDP_IER, AT91_UDP_RXRSM); | |
1424 | at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_RXSUSP); | |
bae4bd84 DB |
1425 | // VDBG("bus suspend\n"); |
1426 | if (udc->suspended) | |
1427 | continue; | |
1428 | udc->suspended = 1; | |
1429 | ||
1430 | /* | |
1431 | * NOTE: when suspending a VBUS-powered device, the | |
1432 | * gadget driver should switch into slow clock mode | |
1433 | * and then into standby to avoid drawing more than | |
1434 | * 500uA power (2500uA for some high-power configs). | |
1435 | */ | |
1436 | if (udc->driver && udc->driver->suspend) | |
1437 | udc->driver->suspend(&udc->gadget); | |
1438 | ||
1439 | /* host initiated resume */ | |
1440 | } else if (status & AT91_UDP_RXRSM) { | |
ffd3326b AV |
1441 | at91_udp_write(udc, AT91_UDP_IDR, AT91_UDP_RXRSM); |
1442 | at91_udp_write(udc, AT91_UDP_IER, AT91_UDP_RXSUSP); | |
1443 | at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_RXRSM); | |
bae4bd84 DB |
1444 | // VDBG("bus resume\n"); |
1445 | if (!udc->suspended) | |
1446 | continue; | |
1447 | udc->suspended = 0; | |
1448 | ||
1449 | /* | |
1450 | * NOTE: for a VBUS-powered device, the gadget driver | |
1451 | * would normally want to switch out of slow clock | |
1452 | * mode into normal mode. | |
1453 | */ | |
1454 | if (udc->driver && udc->driver->resume) | |
1455 | udc->driver->resume(&udc->gadget); | |
1456 | ||
1457 | /* endpoint IRQs are cleared by handling them */ | |
1458 | } else { | |
1459 | int i; | |
1460 | unsigned mask = 1; | |
1461 | struct at91_ep *ep = &udc->ep[1]; | |
1462 | ||
1463 | if (status & mask) | |
1464 | handle_ep0(udc); | |
1465 | for (i = 1; i < NUM_ENDPOINTS; i++) { | |
1466 | mask <<= 1; | |
1467 | if (status & mask) | |
1468 | handle_ep(ep); | |
1469 | ep++; | |
1470 | } | |
1471 | } | |
1472 | } | |
1473 | ||
c6c35237 HH |
1474 | if (disable_clock) |
1475 | clk_off(udc); | |
1476 | ||
bae4bd84 DB |
1477 | return IRQ_HANDLED; |
1478 | } | |
1479 | ||
1480 | /*-------------------------------------------------------------------------*/ | |
1481 | ||
8b2e7668 DB |
1482 | static void nop_release(struct device *dev) |
1483 | { | |
1484 | /* nothing to free */ | |
1485 | } | |
1486 | ||
bae4bd84 DB |
1487 | static struct at91_udc controller = { |
1488 | .gadget = { | |
8b2e7668 DB |
1489 | .ops = &at91_udc_ops, |
1490 | .ep0 = &controller.ep[0].ep, | |
1491 | .name = driver_name, | |
1492 | .dev = { | |
c682b170 | 1493 | .init_name = "gadget", |
8b2e7668 | 1494 | .release = nop_release, |
bae4bd84 DB |
1495 | } |
1496 | }, | |
1497 | .ep[0] = { | |
1498 | .ep = { | |
1499 | .name = ep0name, | |
1500 | .ops = &at91_ep_ops, | |
1501 | }, | |
1502 | .udc = &controller, | |
1503 | .maxpacket = 8, | |
bae4bd84 DB |
1504 | .int_mask = 1 << 0, |
1505 | }, | |
1506 | .ep[1] = { | |
1507 | .ep = { | |
1508 | .name = "ep1", | |
1509 | .ops = &at91_ep_ops, | |
1510 | }, | |
1511 | .udc = &controller, | |
1512 | .is_pingpong = 1, | |
1513 | .maxpacket = 64, | |
bae4bd84 DB |
1514 | .int_mask = 1 << 1, |
1515 | }, | |
1516 | .ep[2] = { | |
1517 | .ep = { | |
1518 | .name = "ep2", | |
1519 | .ops = &at91_ep_ops, | |
1520 | }, | |
1521 | .udc = &controller, | |
1522 | .is_pingpong = 1, | |
1523 | .maxpacket = 64, | |
bae4bd84 DB |
1524 | .int_mask = 1 << 2, |
1525 | }, | |
1526 | .ep[3] = { | |
1527 | .ep = { | |
1528 | /* could actually do bulk too */ | |
1529 | .name = "ep3-int", | |
1530 | .ops = &at91_ep_ops, | |
1531 | }, | |
1532 | .udc = &controller, | |
1533 | .maxpacket = 8, | |
bae4bd84 DB |
1534 | .int_mask = 1 << 3, |
1535 | }, | |
1536 | .ep[4] = { | |
1537 | .ep = { | |
1538 | .name = "ep4", | |
1539 | .ops = &at91_ep_ops, | |
1540 | }, | |
1541 | .udc = &controller, | |
1542 | .is_pingpong = 1, | |
1543 | .maxpacket = 256, | |
bae4bd84 DB |
1544 | .int_mask = 1 << 4, |
1545 | }, | |
1546 | .ep[5] = { | |
1547 | .ep = { | |
1548 | .name = "ep5", | |
1549 | .ops = &at91_ep_ops, | |
1550 | }, | |
1551 | .udc = &controller, | |
1552 | .is_pingpong = 1, | |
1553 | .maxpacket = 256, | |
bae4bd84 DB |
1554 | .int_mask = 1 << 5, |
1555 | }, | |
8b2e7668 | 1556 | /* ep6 and ep7 are also reserved (custom silicon might use them) */ |
bae4bd84 DB |
1557 | }; |
1558 | ||
7d12e780 | 1559 | static irqreturn_t at91_vbus_irq(int irq, void *_udc) |
bae4bd84 DB |
1560 | { |
1561 | struct at91_udc *udc = _udc; | |
1562 | unsigned value; | |
1563 | ||
1564 | /* vbus needs at least brief debouncing */ | |
1565 | udelay(10); | |
f3db6e82 | 1566 | value = gpio_get_value(udc->board.vbus_pin); |
bae4bd84 DB |
1567 | if (value != udc->vbus) |
1568 | at91_vbus_session(&udc->gadget, value); | |
1569 | ||
1570 | return IRQ_HANDLED; | |
1571 | } | |
1572 | ||
1573 | int usb_gadget_register_driver (struct usb_gadget_driver *driver) | |
1574 | { | |
1575 | struct at91_udc *udc = &controller; | |
1576 | int retval; | |
1577 | ||
1578 | if (!driver | |
bc92c32a | 1579 | || driver->speed < USB_SPEED_FULL |
bae4bd84 | 1580 | || !driver->bind |
bae4bd84 DB |
1581 | || !driver->setup) { |
1582 | DBG("bad parameter.\n"); | |
1583 | return -EINVAL; | |
1584 | } | |
1585 | ||
1586 | if (udc->driver) { | |
1587 | DBG("UDC already has a gadget driver\n"); | |
1588 | return -EBUSY; | |
1589 | } | |
1590 | ||
1591 | udc->driver = driver; | |
1592 | udc->gadget.dev.driver = &driver->driver; | |
839214ae | 1593 | dev_set_drvdata(&udc->gadget.dev, &driver->driver); |
bae4bd84 DB |
1594 | udc->enabled = 1; |
1595 | udc->selfpowered = 1; | |
1596 | ||
1597 | retval = driver->bind(&udc->gadget); | |
1598 | if (retval) { | |
1599 | DBG("driver->bind() returned %d\n", retval); | |
1600 | udc->driver = NULL; | |
943c4419 | 1601 | udc->gadget.dev.driver = NULL; |
839214ae | 1602 | dev_set_drvdata(&udc->gadget.dev, NULL); |
943c4419 WK |
1603 | udc->enabled = 0; |
1604 | udc->selfpowered = 0; | |
bae4bd84 DB |
1605 | return retval; |
1606 | } | |
1607 | ||
1608 | local_irq_disable(); | |
1609 | pullup(udc, 1); | |
1610 | local_irq_enable(); | |
1611 | ||
1612 | DBG("bound to %s\n", driver->driver.name); | |
1613 | return 0; | |
1614 | } | |
1615 | EXPORT_SYMBOL (usb_gadget_register_driver); | |
1616 | ||
1617 | int usb_gadget_unregister_driver (struct usb_gadget_driver *driver) | |
1618 | { | |
1619 | struct at91_udc *udc = &controller; | |
1620 | ||
6bea476c | 1621 | if (!driver || driver != udc->driver || !driver->unbind) |
bae4bd84 DB |
1622 | return -EINVAL; |
1623 | ||
1624 | local_irq_disable(); | |
1625 | udc->enabled = 0; | |
ffd3326b | 1626 | at91_udp_write(udc, AT91_UDP_IDR, ~0); |
bae4bd84 DB |
1627 | pullup(udc, 0); |
1628 | local_irq_enable(); | |
1629 | ||
1630 | driver->unbind(&udc->gadget); | |
eb0be47d | 1631 | udc->gadget.dev.driver = NULL; |
839214ae | 1632 | dev_set_drvdata(&udc->gadget.dev, NULL); |
bae4bd84 DB |
1633 | udc->driver = NULL; |
1634 | ||
1635 | DBG("unbound from %s\n", driver->driver.name); | |
1636 | return 0; | |
1637 | } | |
1638 | EXPORT_SYMBOL (usb_gadget_unregister_driver); | |
1639 | ||
1640 | /*-------------------------------------------------------------------------*/ | |
1641 | ||
1642 | static void at91udc_shutdown(struct platform_device *dev) | |
1643 | { | |
1644 | /* force disconnect on reboot */ | |
1645 | pullup(platform_get_drvdata(dev), 0); | |
1646 | } | |
1647 | ||
398acce7 | 1648 | static int __init at91udc_probe(struct platform_device *pdev) |
bae4bd84 DB |
1649 | { |
1650 | struct device *dev = &pdev->dev; | |
1651 | struct at91_udc *udc; | |
1652 | int retval; | |
ffd3326b | 1653 | struct resource *res; |
bae4bd84 DB |
1654 | |
1655 | if (!dev->platform_data) { | |
1656 | /* small (so we copy it) but critical! */ | |
1657 | DBG("missing platform_data\n"); | |
1658 | return -ENODEV; | |
1659 | } | |
1660 | ||
8b2e7668 | 1661 | if (pdev->num_resources != 2) { |
f3db6e82 | 1662 | DBG("invalid num_resources\n"); |
8b2e7668 DB |
1663 | return -ENODEV; |
1664 | } | |
1665 | if ((pdev->resource[0].flags != IORESOURCE_MEM) | |
1666 | || (pdev->resource[1].flags != IORESOURCE_IRQ)) { | |
f3db6e82 | 1667 | DBG("invalid resource type\n"); |
8b2e7668 DB |
1668 | return -ENODEV; |
1669 | } | |
1670 | ||
ffd3326b AV |
1671 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
1672 | if (!res) | |
1673 | return -ENXIO; | |
1674 | ||
d8bb0fd2 | 1675 | if (!request_mem_region(res->start, resource_size(res), driver_name)) { |
bae4bd84 DB |
1676 | DBG("someone's using UDC memory\n"); |
1677 | return -EBUSY; | |
1678 | } | |
1679 | ||
1680 | /* init software state */ | |
1681 | udc = &controller; | |
1682 | udc->gadget.dev.parent = dev; | |
1683 | udc->board = *(struct at91_udc_data *) dev->platform_data; | |
1684 | udc->pdev = pdev; | |
bae4bd84 DB |
1685 | udc->enabled = 0; |
1686 | ||
f3db6e82 DB |
1687 | /* rm9200 needs manual D+ pullup; off by default */ |
1688 | if (cpu_is_at91rm9200()) { | |
1689 | if (udc->board.pullup_pin <= 0) { | |
1690 | DBG("no D+ pullup?\n"); | |
1691 | retval = -ENODEV; | |
1692 | goto fail0; | |
1693 | } | |
1694 | retval = gpio_request(udc->board.pullup_pin, "udc_pullup"); | |
1695 | if (retval) { | |
1696 | DBG("D+ pullup is busy\n"); | |
1697 | goto fail0; | |
1698 | } | |
1699 | gpio_direction_output(udc->board.pullup_pin, | |
1700 | udc->board.pullup_active_low); | |
1701 | } | |
1702 | ||
bb24280f DB |
1703 | /* newer chips have more FIFO memory than rm9200 */ |
1704 | if (cpu_is_at91sam9260()) { | |
1705 | udc->ep[0].maxpacket = 64; | |
1706 | udc->ep[3].maxpacket = 64; | |
1707 | udc->ep[4].maxpacket = 512; | |
1708 | udc->ep[5].maxpacket = 512; | |
23f6d914 | 1709 | } else if (cpu_is_at91sam9261() || cpu_is_at91sam9g10()) { |
bb24280f DB |
1710 | udc->ep[3].maxpacket = 64; |
1711 | } else if (cpu_is_at91sam9263()) { | |
1712 | udc->ep[0].maxpacket = 64; | |
1713 | udc->ep[3].maxpacket = 64; | |
1714 | } | |
1715 | ||
d8bb0fd2 | 1716 | udc->udp_baseaddr = ioremap(res->start, resource_size(res)); |
ffd3326b | 1717 | if (!udc->udp_baseaddr) { |
f3db6e82 DB |
1718 | retval = -ENOMEM; |
1719 | goto fail0a; | |
ffd3326b AV |
1720 | } |
1721 | ||
1722 | udc_reinit(udc); | |
1723 | ||
bae4bd84 DB |
1724 | /* get interface and function clocks */ |
1725 | udc->iclk = clk_get(dev, "udc_clk"); | |
1726 | udc->fclk = clk_get(dev, "udpck"); | |
1727 | if (IS_ERR(udc->iclk) || IS_ERR(udc->fclk)) { | |
1728 | DBG("clocks missing\n"); | |
29ba4b53 | 1729 | retval = -ENODEV; |
f3db6e82 DB |
1730 | /* NOTE: we "know" here that refcounts on these are NOPs */ |
1731 | goto fail0b; | |
bae4bd84 DB |
1732 | } |
1733 | ||
1734 | retval = device_register(&udc->gadget.dev); | |
1735 | if (retval < 0) | |
f3db6e82 | 1736 | goto fail0b; |
bae4bd84 | 1737 | |
8b2e7668 DB |
1738 | /* don't do anything until we have both gadget driver and VBUS */ |
1739 | clk_enable(udc->iclk); | |
ffd3326b AV |
1740 | at91_udp_write(udc, AT91_UDP_TXVC, AT91_UDP_TXVC_TXVDIS); |
1741 | at91_udp_write(udc, AT91_UDP_IDR, 0xffffffff); | |
29ba4b53 AV |
1742 | /* Clear all pending interrupts - UDP may be used by bootloader. */ |
1743 | at91_udp_write(udc, AT91_UDP_ICR, 0xffffffff); | |
8b2e7668 | 1744 | clk_disable(udc->iclk); |
bae4bd84 DB |
1745 | |
1746 | /* request UDC and maybe VBUS irqs */ | |
8b2e7668 | 1747 | udc->udp_irq = platform_get_irq(pdev, 0); |
f3db6e82 DB |
1748 | retval = request_irq(udc->udp_irq, at91_udc_irq, |
1749 | IRQF_DISABLED, driver_name, udc); | |
1750 | if (retval < 0) { | |
8b2e7668 | 1751 | DBG("request irq %d failed\n", udc->udp_irq); |
bae4bd84 DB |
1752 | goto fail1; |
1753 | } | |
1754 | if (udc->board.vbus_pin > 0) { | |
f3db6e82 DB |
1755 | retval = gpio_request(udc->board.vbus_pin, "udc_vbus"); |
1756 | if (retval < 0) { | |
1757 | DBG("request vbus pin failed\n"); | |
1758 | goto fail2; | |
1759 | } | |
1760 | gpio_direction_input(udc->board.vbus_pin); | |
1761 | ||
29ba4b53 AV |
1762 | /* |
1763 | * Get the initial state of VBUS - we cannot expect | |
1764 | * a pending interrupt. | |
1765 | */ | |
f3db6e82 | 1766 | udc->vbus = gpio_get_value(udc->board.vbus_pin); |
8b2e7668 DB |
1767 | if (request_irq(udc->board.vbus_pin, at91_vbus_irq, |
1768 | IRQF_DISABLED, driver_name, udc)) { | |
1769 | DBG("request vbus irq %d failed\n", | |
1770 | udc->board.vbus_pin); | |
bae4bd84 | 1771 | retval = -EBUSY; |
f3db6e82 | 1772 | goto fail3; |
bae4bd84 DB |
1773 | } |
1774 | } else { | |
1775 | DBG("no VBUS detection, assuming always-on\n"); | |
1776 | udc->vbus = 1; | |
1777 | } | |
1778 | dev_set_drvdata(dev, udc); | |
8b2e7668 | 1779 | device_init_wakeup(dev, 1); |
bae4bd84 DB |
1780 | create_debug_file(udc); |
1781 | ||
1782 | INFO("%s version %s\n", driver_name, DRIVER_VERSION); | |
1783 | return 0; | |
1784 | ||
f3db6e82 DB |
1785 | fail3: |
1786 | if (udc->board.vbus_pin > 0) | |
1787 | gpio_free(udc->board.vbus_pin); | |
1788 | fail2: | |
1789 | free_irq(udc->udp_irq, udc); | |
bae4bd84 DB |
1790 | fail1: |
1791 | device_unregister(&udc->gadget.dev); | |
f3db6e82 DB |
1792 | fail0b: |
1793 | iounmap(udc->udp_baseaddr); | |
1794 | fail0a: | |
1795 | if (cpu_is_at91rm9200()) | |
1796 | gpio_free(udc->board.pullup_pin); | |
bae4bd84 | 1797 | fail0: |
d8bb0fd2 | 1798 | release_mem_region(res->start, resource_size(res)); |
bae4bd84 DB |
1799 | DBG("%s probe failed, %d\n", driver_name, retval); |
1800 | return retval; | |
1801 | } | |
1802 | ||
398acce7 | 1803 | static int __exit at91udc_remove(struct platform_device *pdev) |
bae4bd84 | 1804 | { |
8b2e7668 | 1805 | struct at91_udc *udc = platform_get_drvdata(pdev); |
ffd3326b | 1806 | struct resource *res; |
bae4bd84 DB |
1807 | |
1808 | DBG("remove\n"); | |
1809 | ||
6bea476c DB |
1810 | if (udc->driver) |
1811 | return -EBUSY; | |
bae4bd84 | 1812 | |
6bea476c | 1813 | pullup(udc, 0); |
bae4bd84 | 1814 | |
8b2e7668 | 1815 | device_init_wakeup(&pdev->dev, 0); |
bae4bd84 | 1816 | remove_debug_file(udc); |
f3db6e82 | 1817 | if (udc->board.vbus_pin > 0) { |
bae4bd84 | 1818 | free_irq(udc->board.vbus_pin, udc); |
f3db6e82 DB |
1819 | gpio_free(udc->board.vbus_pin); |
1820 | } | |
8b2e7668 | 1821 | free_irq(udc->udp_irq, udc); |
bae4bd84 | 1822 | device_unregister(&udc->gadget.dev); |
ffd3326b AV |
1823 | |
1824 | iounmap(udc->udp_baseaddr); | |
f3db6e82 DB |
1825 | |
1826 | if (cpu_is_at91rm9200()) | |
1827 | gpio_free(udc->board.pullup_pin); | |
1828 | ||
ffd3326b | 1829 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
d8bb0fd2 | 1830 | release_mem_region(res->start, resource_size(res)); |
bae4bd84 DB |
1831 | |
1832 | clk_put(udc->iclk); | |
1833 | clk_put(udc->fclk); | |
1834 | ||
1835 | return 0; | |
1836 | } | |
1837 | ||
1838 | #ifdef CONFIG_PM | |
8b2e7668 | 1839 | static int at91udc_suspend(struct platform_device *pdev, pm_message_t mesg) |
bae4bd84 | 1840 | { |
8b2e7668 DB |
1841 | struct at91_udc *udc = platform_get_drvdata(pdev); |
1842 | int wake = udc->driver && device_may_wakeup(&pdev->dev); | |
bae4bd84 | 1843 | |
8b2e7668 DB |
1844 | /* Unless we can act normally to the host (letting it wake us up |
1845 | * whenever it has work for us) force disconnect. Wakeup requires | |
1846 | * PLLB for USB events (signaling for reset, wakeup, or incoming | |
1847 | * tokens) and VBUS irqs (on systems which support them). | |
bae4bd84 | 1848 | */ |
8b2e7668 DB |
1849 | if ((!udc->suspended && udc->addr) |
1850 | || !wake | |
1851 | || at91_suspend_entering_slow_clock()) { | |
bae4bd84 | 1852 | pullup(udc, 0); |
66e56ce7 | 1853 | wake = 0; |
8b2e7668 DB |
1854 | } else |
1855 | enable_irq_wake(udc->udp_irq); | |
1856 | ||
66e56ce7 DB |
1857 | udc->active_suspend = wake; |
1858 | if (udc->board.vbus_pin > 0 && wake) | |
1859 | enable_irq_wake(udc->board.vbus_pin); | |
bae4bd84 DB |
1860 | return 0; |
1861 | } | |
1862 | ||
8b2e7668 | 1863 | static int at91udc_resume(struct platform_device *pdev) |
bae4bd84 | 1864 | { |
8b2e7668 | 1865 | struct at91_udc *udc = platform_get_drvdata(pdev); |
bae4bd84 | 1866 | |
66e56ce7 DB |
1867 | if (udc->board.vbus_pin > 0 && udc->active_suspend) |
1868 | disable_irq_wake(udc->board.vbus_pin); | |
1869 | ||
bae4bd84 | 1870 | /* maybe reconnect to host; if so, clocks on */ |
66e56ce7 DB |
1871 | if (udc->active_suspend) |
1872 | disable_irq_wake(udc->udp_irq); | |
1873 | else | |
1874 | pullup(udc, 1); | |
bae4bd84 DB |
1875 | return 0; |
1876 | } | |
1877 | #else | |
1878 | #define at91udc_suspend NULL | |
1879 | #define at91udc_resume NULL | |
1880 | #endif | |
1881 | ||
dee497df | 1882 | static struct platform_driver at91_udc_driver = { |
398acce7 | 1883 | .remove = __exit_p(at91udc_remove), |
bae4bd84 DB |
1884 | .shutdown = at91udc_shutdown, |
1885 | .suspend = at91udc_suspend, | |
8b2e7668 | 1886 | .resume = at91udc_resume, |
bae4bd84 DB |
1887 | .driver = { |
1888 | .name = (char *) driver_name, | |
1889 | .owner = THIS_MODULE, | |
1890 | }, | |
1891 | }; | |
1892 | ||
398acce7 | 1893 | static int __init udc_init_module(void) |
bae4bd84 | 1894 | { |
dee497df | 1895 | return platform_driver_probe(&at91_udc_driver, at91udc_probe); |
bae4bd84 DB |
1896 | } |
1897 | module_init(udc_init_module); | |
1898 | ||
398acce7 | 1899 | static void __exit udc_exit_module(void) |
bae4bd84 | 1900 | { |
dee497df | 1901 | platform_driver_unregister(&at91_udc_driver); |
bae4bd84 DB |
1902 | } |
1903 | module_exit(udc_exit_module); | |
1904 | ||
8b2e7668 | 1905 | MODULE_DESCRIPTION("AT91 udc driver"); |
bae4bd84 DB |
1906 | MODULE_AUTHOR("Thomas Rathbone, David Brownell"); |
1907 | MODULE_LICENSE("GPL"); | |
f34c32f1 | 1908 | MODULE_ALIAS("platform:at91_udc"); |