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d75379a5 RJ |
1 | /* |
2 | * Handles the Intel 27x USB Device Controller (UDC) | |
3 | * | |
4 | * Inspired by original driver by Frank Becker, David Brownell, and others. | |
5 | * Copyright (C) 2008 Robert Jarzmik | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
d75379a5 RJ |
11 | */ |
12 | #include <linux/module.h> | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/types.h> | |
d75379a5 | 15 | #include <linux/errno.h> |
ded017ee | 16 | #include <linux/err.h> |
d75379a5 RJ |
17 | #include <linux/platform_device.h> |
18 | #include <linux/delay.h> | |
19 | #include <linux/list.h> | |
20 | #include <linux/interrupt.h> | |
21 | #include <linux/proc_fs.h> | |
22 | #include <linux/clk.h> | |
23 | #include <linux/irq.h> | |
eb507025 | 24 | #include <linux/gpio.h> |
5a0e3ad6 | 25 | #include <linux/slab.h> |
268bb0ce | 26 | #include <linux/prefetch.h> |
756380e0 FB |
27 | #include <linux/byteorder/generic.h> |
28 | #include <linux/platform_data/pxa2xx_udc.h> | |
d75379a5 RJ |
29 | |
30 | #include <linux/usb.h> | |
31 | #include <linux/usb/ch9.h> | |
32 | #include <linux/usb/gadget.h> | |
d75379a5 RJ |
33 | |
34 | #include "pxa27x_udc.h" | |
35 | ||
36 | /* | |
37 | * This driver handles the USB Device Controller (UDC) in Intel's PXA 27x | |
38 | * series processors. | |
39 | * | |
40 | * Such controller drivers work with a gadget driver. The gadget driver | |
41 | * returns descriptors, implements configuration and data protocols used | |
42 | * by the host to interact with this device, and allocates endpoints to | |
43 | * the different protocol interfaces. The controller driver virtualizes | |
44 | * usb hardware so that the gadget drivers will be more portable. | |
45 | * | |
46 | * This UDC hardware wants to implement a bit too much USB protocol. The | |
47 | * biggest issues are: that the endpoints have to be set up before the | |
48 | * controller can be enabled (minor, and not uncommon); and each endpoint | |
49 | * can only have one configuration, interface and alternative interface | |
50 | * number (major, and very unusual). Once set up, these cannot be changed | |
51 | * without a controller reset. | |
52 | * | |
53 | * The workaround is to setup all combinations necessary for the gadgets which | |
54 | * will work with this driver. This is done in pxa_udc structure, statically. | |
55 | * See pxa_udc, udc_usb_ep versus pxa_ep, and matching function find_pxa_ep. | |
56 | * (You could modify this if needed. Some drivers have a "fifo_mode" module | |
57 | * parameter to facilitate such changes.) | |
58 | * | |
59 | * The combinations have been tested with these gadgets : | |
60 | * - zero gadget | |
61 | * - file storage gadget | |
62 | * - ether gadget | |
63 | * | |
64 | * The driver doesn't use DMA, only IO access and IRQ callbacks. No use is | |
65 | * made of UDC's double buffering either. USB "On-The-Go" is not implemented. | |
66 | * | |
67 | * All the requests are handled the same way : | |
68 | * - the drivers tries to handle the request directly to the IO | |
69 | * - if the IO fifo is not big enough, the remaining is send/received in | |
70 | * interrupt handling. | |
71 | */ | |
72 | ||
73 | #define DRIVER_VERSION "2008-04-18" | |
74 | #define DRIVER_DESC "PXA 27x USB Device Controller driver" | |
75 | ||
76 | static const char driver_name[] = "pxa27x_udc"; | |
77 | static struct pxa_udc *the_controller; | |
78 | ||
79 | static void handle_ep(struct pxa_ep *ep); | |
80 | ||
81 | /* | |
82 | * Debug filesystem | |
83 | */ | |
84 | #ifdef CONFIG_USB_GADGET_DEBUG_FS | |
85 | ||
86 | #include <linux/debugfs.h> | |
87 | #include <linux/uaccess.h> | |
88 | #include <linux/seq_file.h> | |
89 | ||
90 | static int state_dbg_show(struct seq_file *s, void *p) | |
91 | { | |
92 | struct pxa_udc *udc = s->private; | |
93 | int pos = 0, ret; | |
94 | u32 tmp; | |
95 | ||
96 | ret = -ENODEV; | |
97 | if (!udc->driver) | |
98 | goto out; | |
99 | ||
100 | /* basic device status */ | |
101 | pos += seq_printf(s, DRIVER_DESC "\n" | |
102 | "%s version: %s\nGadget driver: %s\n", | |
103 | driver_name, DRIVER_VERSION, | |
104 | udc->driver ? udc->driver->driver.name : "(none)"); | |
105 | ||
106 | tmp = udc_readl(udc, UDCCR); | |
107 | pos += seq_printf(s, | |
108 | "udccr=0x%0x(%s%s%s%s%s%s%s%s%s%s), " | |
109 | "con=%d,inter=%d,altinter=%d\n", tmp, | |
110 | (tmp & UDCCR_OEN) ? " oen":"", | |
111 | (tmp & UDCCR_AALTHNP) ? " aalthnp":"", | |
112 | (tmp & UDCCR_AHNP) ? " rem" : "", | |
113 | (tmp & UDCCR_BHNP) ? " rstir" : "", | |
114 | (tmp & UDCCR_DWRE) ? " dwre" : "", | |
115 | (tmp & UDCCR_SMAC) ? " smac" : "", | |
116 | (tmp & UDCCR_EMCE) ? " emce" : "", | |
117 | (tmp & UDCCR_UDR) ? " udr" : "", | |
118 | (tmp & UDCCR_UDA) ? " uda" : "", | |
119 | (tmp & UDCCR_UDE) ? " ude" : "", | |
120 | (tmp & UDCCR_ACN) >> UDCCR_ACN_S, | |
121 | (tmp & UDCCR_AIN) >> UDCCR_AIN_S, | |
122 | (tmp & UDCCR_AAISN) >> UDCCR_AAISN_S); | |
123 | /* registers for device and ep0 */ | |
124 | pos += seq_printf(s, "udcicr0=0x%08x udcicr1=0x%08x\n", | |
125 | udc_readl(udc, UDCICR0), udc_readl(udc, UDCICR1)); | |
126 | pos += seq_printf(s, "udcisr0=0x%08x udcisr1=0x%08x\n", | |
127 | udc_readl(udc, UDCISR0), udc_readl(udc, UDCISR1)); | |
128 | pos += seq_printf(s, "udcfnr=%d\n", udc_readl(udc, UDCFNR)); | |
129 | pos += seq_printf(s, "irqs: reset=%lu, suspend=%lu, resume=%lu, " | |
130 | "reconfig=%lu\n", | |
131 | udc->stats.irqs_reset, udc->stats.irqs_suspend, | |
132 | udc->stats.irqs_resume, udc->stats.irqs_reconfig); | |
133 | ||
134 | ret = 0; | |
135 | out: | |
136 | return ret; | |
137 | } | |
138 | ||
139 | static int queues_dbg_show(struct seq_file *s, void *p) | |
140 | { | |
141 | struct pxa_udc *udc = s->private; | |
142 | struct pxa_ep *ep; | |
143 | struct pxa27x_request *req; | |
144 | int pos = 0, i, maxpkt, ret; | |
145 | ||
146 | ret = -ENODEV; | |
147 | if (!udc->driver) | |
148 | goto out; | |
149 | ||
150 | /* dump endpoint queues */ | |
151 | for (i = 0; i < NR_PXA_ENDPOINTS; i++) { | |
152 | ep = &udc->pxa_ep[i]; | |
153 | maxpkt = ep->fifo_size; | |
154 | pos += seq_printf(s, "%-12s max_pkt=%d %s\n", | |
155 | EPNAME(ep), maxpkt, "pio"); | |
156 | ||
157 | if (list_empty(&ep->queue)) { | |
158 | pos += seq_printf(s, "\t(nothing queued)\n"); | |
159 | continue; | |
160 | } | |
161 | ||
162 | list_for_each_entry(req, &ep->queue, queue) { | |
163 | pos += seq_printf(s, "\treq %p len %d/%d buf %p\n", | |
164 | &req->req, req->req.actual, | |
165 | req->req.length, req->req.buf); | |
166 | } | |
167 | } | |
168 | ||
169 | ret = 0; | |
170 | out: | |
171 | return ret; | |
172 | } | |
173 | ||
174 | static int eps_dbg_show(struct seq_file *s, void *p) | |
175 | { | |
176 | struct pxa_udc *udc = s->private; | |
177 | struct pxa_ep *ep; | |
178 | int pos = 0, i, ret; | |
179 | u32 tmp; | |
180 | ||
181 | ret = -ENODEV; | |
182 | if (!udc->driver) | |
183 | goto out; | |
184 | ||
185 | ep = &udc->pxa_ep[0]; | |
186 | tmp = udc_ep_readl(ep, UDCCSR); | |
187 | pos += seq_printf(s, "udccsr0=0x%03x(%s%s%s%s%s%s%s)\n", tmp, | |
188 | (tmp & UDCCSR0_SA) ? " sa" : "", | |
189 | (tmp & UDCCSR0_RNE) ? " rne" : "", | |
190 | (tmp & UDCCSR0_FST) ? " fst" : "", | |
191 | (tmp & UDCCSR0_SST) ? " sst" : "", | |
192 | (tmp & UDCCSR0_DME) ? " dme" : "", | |
193 | (tmp & UDCCSR0_IPR) ? " ipr" : "", | |
194 | (tmp & UDCCSR0_OPC) ? " opc" : ""); | |
195 | for (i = 0; i < NR_PXA_ENDPOINTS; i++) { | |
196 | ep = &udc->pxa_ep[i]; | |
197 | tmp = i? udc_ep_readl(ep, UDCCR) : udc_readl(udc, UDCCR); | |
198 | pos += seq_printf(s, "%-12s: " | |
199 | "IN %lu(%lu reqs), OUT %lu(%lu reqs), " | |
200 | "irqs=%lu, udccr=0x%08x, udccsr=0x%03x, " | |
201 | "udcbcr=%d\n", | |
202 | EPNAME(ep), | |
203 | ep->stats.in_bytes, ep->stats.in_ops, | |
204 | ep->stats.out_bytes, ep->stats.out_ops, | |
205 | ep->stats.irqs, | |
206 | tmp, udc_ep_readl(ep, UDCCSR), | |
207 | udc_ep_readl(ep, UDCBCR)); | |
208 | } | |
209 | ||
210 | ret = 0; | |
211 | out: | |
212 | return ret; | |
213 | } | |
214 | ||
215 | static int eps_dbg_open(struct inode *inode, struct file *file) | |
216 | { | |
217 | return single_open(file, eps_dbg_show, inode->i_private); | |
218 | } | |
219 | ||
220 | static int queues_dbg_open(struct inode *inode, struct file *file) | |
221 | { | |
222 | return single_open(file, queues_dbg_show, inode->i_private); | |
223 | } | |
224 | ||
225 | static int state_dbg_open(struct inode *inode, struct file *file) | |
226 | { | |
227 | return single_open(file, state_dbg_show, inode->i_private); | |
228 | } | |
229 | ||
230 | static const struct file_operations state_dbg_fops = { | |
231 | .owner = THIS_MODULE, | |
232 | .open = state_dbg_open, | |
233 | .llseek = seq_lseek, | |
234 | .read = seq_read, | |
235 | .release = single_release, | |
236 | }; | |
237 | ||
238 | static const struct file_operations queues_dbg_fops = { | |
239 | .owner = THIS_MODULE, | |
240 | .open = queues_dbg_open, | |
241 | .llseek = seq_lseek, | |
242 | .read = seq_read, | |
243 | .release = single_release, | |
244 | }; | |
245 | ||
246 | static const struct file_operations eps_dbg_fops = { | |
247 | .owner = THIS_MODULE, | |
248 | .open = eps_dbg_open, | |
249 | .llseek = seq_lseek, | |
250 | .read = seq_read, | |
251 | .release = single_release, | |
252 | }; | |
253 | ||
254 | static void pxa_init_debugfs(struct pxa_udc *udc) | |
255 | { | |
256 | struct dentry *root, *state, *queues, *eps; | |
257 | ||
258 | root = debugfs_create_dir(udc->gadget.name, NULL); | |
259 | if (IS_ERR(root) || !root) | |
260 | goto err_root; | |
261 | ||
262 | state = debugfs_create_file("udcstate", 0400, root, udc, | |
263 | &state_dbg_fops); | |
264 | if (!state) | |
265 | goto err_state; | |
266 | queues = debugfs_create_file("queues", 0400, root, udc, | |
267 | &queues_dbg_fops); | |
268 | if (!queues) | |
269 | goto err_queues; | |
270 | eps = debugfs_create_file("epstate", 0400, root, udc, | |
271 | &eps_dbg_fops); | |
00185a60 | 272 | if (!eps) |
d75379a5 RJ |
273 | goto err_eps; |
274 | ||
275 | udc->debugfs_root = root; | |
276 | udc->debugfs_state = state; | |
277 | udc->debugfs_queues = queues; | |
278 | udc->debugfs_eps = eps; | |
279 | return; | |
280 | err_eps: | |
281 | debugfs_remove(eps); | |
282 | err_queues: | |
283 | debugfs_remove(queues); | |
284 | err_state: | |
285 | debugfs_remove(root); | |
286 | err_root: | |
287 | dev_err(udc->dev, "debugfs is not available\n"); | |
288 | } | |
289 | ||
290 | static void pxa_cleanup_debugfs(struct pxa_udc *udc) | |
291 | { | |
292 | debugfs_remove(udc->debugfs_eps); | |
293 | debugfs_remove(udc->debugfs_queues); | |
294 | debugfs_remove(udc->debugfs_state); | |
295 | debugfs_remove(udc->debugfs_root); | |
296 | udc->debugfs_eps = NULL; | |
297 | udc->debugfs_queues = NULL; | |
298 | udc->debugfs_state = NULL; | |
299 | udc->debugfs_root = NULL; | |
300 | } | |
301 | ||
302 | #else | |
303 | static inline void pxa_init_debugfs(struct pxa_udc *udc) | |
304 | { | |
305 | } | |
306 | ||
307 | static inline void pxa_cleanup_debugfs(struct pxa_udc *udc) | |
308 | { | |
309 | } | |
310 | #endif | |
311 | ||
312 | /** | |
313 | * is_match_usb_pxa - check if usb_ep and pxa_ep match | |
314 | * @udc_usb_ep: usb endpoint | |
315 | * @ep: pxa endpoint | |
316 | * @config: configuration required in pxa_ep | |
317 | * @interface: interface required in pxa_ep | |
318 | * @altsetting: altsetting required in pxa_ep | |
319 | * | |
320 | * Returns 1 if all criteria match between pxa and usb endpoint, 0 otherwise | |
321 | */ | |
322 | static int is_match_usb_pxa(struct udc_usb_ep *udc_usb_ep, struct pxa_ep *ep, | |
323 | int config, int interface, int altsetting) | |
324 | { | |
325 | if (usb_endpoint_num(&udc_usb_ep->desc) != ep->addr) | |
326 | return 0; | |
327 | if (usb_endpoint_dir_in(&udc_usb_ep->desc) != ep->dir_in) | |
328 | return 0; | |
329 | if (usb_endpoint_type(&udc_usb_ep->desc) != ep->type) | |
330 | return 0; | |
331 | if ((ep->config != config) || (ep->interface != interface) | |
332 | || (ep->alternate != altsetting)) | |
333 | return 0; | |
334 | return 1; | |
335 | } | |
336 | ||
337 | /** | |
338 | * find_pxa_ep - find pxa_ep structure matching udc_usb_ep | |
339 | * @udc: pxa udc | |
340 | * @udc_usb_ep: udc_usb_ep structure | |
341 | * | |
342 | * Match udc_usb_ep and all pxa_ep available, to see if one matches. | |
343 | * This is necessary because of the strong pxa hardware restriction requiring | |
344 | * that once pxa endpoints are initialized, their configuration is freezed, and | |
345 | * no change can be made to their address, direction, or in which configuration, | |
346 | * interface or altsetting they are active ... which differs from more usual | |
347 | * models which have endpoints be roughly just addressable fifos, and leave | |
348 | * configuration events up to gadget drivers (like all control messages). | |
349 | * | |
350 | * Note that there is still a blurred point here : | |
351 | * - we rely on UDCCR register "active interface" and "active altsetting". | |
352 | * This is a nonsense in regard of USB spec, where multiple interfaces are | |
353 | * active at the same time. | |
354 | * - if we knew for sure that the pxa can handle multiple interface at the | |
355 | * same time, assuming Intel's Developer Guide is wrong, this function | |
356 | * should be reviewed, and a cache of couples (iface, altsetting) should | |
357 | * be kept in the pxa_udc structure. In this case this function would match | |
358 | * against the cache of couples instead of the "last altsetting" set up. | |
359 | * | |
360 | * Returns the matched pxa_ep structure or NULL if none found | |
361 | */ | |
362 | static struct pxa_ep *find_pxa_ep(struct pxa_udc *udc, | |
363 | struct udc_usb_ep *udc_usb_ep) | |
364 | { | |
365 | int i; | |
366 | struct pxa_ep *ep; | |
367 | int cfg = udc->config; | |
368 | int iface = udc->last_interface; | |
369 | int alt = udc->last_alternate; | |
370 | ||
371 | if (udc_usb_ep == &udc->udc_usb_ep[0]) | |
372 | return &udc->pxa_ep[0]; | |
373 | ||
374 | for (i = 1; i < NR_PXA_ENDPOINTS; i++) { | |
375 | ep = &udc->pxa_ep[i]; | |
376 | if (is_match_usb_pxa(udc_usb_ep, ep, cfg, iface, alt)) | |
377 | return ep; | |
378 | } | |
379 | return NULL; | |
380 | } | |
381 | ||
382 | /** | |
383 | * update_pxa_ep_matches - update pxa_ep cached values in all udc_usb_ep | |
384 | * @udc: pxa udc | |
385 | * | |
386 | * Context: in_interrupt() | |
387 | * | |
388 | * Updates all pxa_ep fields in udc_usb_ep structures, if this field was | |
389 | * previously set up (and is not NULL). The update is necessary is a | |
390 | * configuration change or altsetting change was issued by the USB host. | |
391 | */ | |
392 | static void update_pxa_ep_matches(struct pxa_udc *udc) | |
393 | { | |
394 | int i; | |
395 | struct udc_usb_ep *udc_usb_ep; | |
396 | ||
397 | for (i = 1; i < NR_USB_ENDPOINTS; i++) { | |
398 | udc_usb_ep = &udc->udc_usb_ep[i]; | |
399 | if (udc_usb_ep->pxa_ep) | |
400 | udc_usb_ep->pxa_ep = find_pxa_ep(udc, udc_usb_ep); | |
401 | } | |
402 | } | |
403 | ||
404 | /** | |
405 | * pio_irq_enable - Enables irq generation for one endpoint | |
406 | * @ep: udc endpoint | |
407 | */ | |
408 | static void pio_irq_enable(struct pxa_ep *ep) | |
409 | { | |
410 | struct pxa_udc *udc = ep->dev; | |
411 | int index = EPIDX(ep); | |
412 | u32 udcicr0 = udc_readl(udc, UDCICR0); | |
413 | u32 udcicr1 = udc_readl(udc, UDCICR1); | |
414 | ||
415 | if (index < 16) | |
416 | udc_writel(udc, UDCICR0, udcicr0 | (3 << (index * 2))); | |
417 | else | |
418 | udc_writel(udc, UDCICR1, udcicr1 | (3 << ((index - 16) * 2))); | |
419 | } | |
420 | ||
421 | /** | |
422 | * pio_irq_disable - Disables irq generation for one endpoint | |
423 | * @ep: udc endpoint | |
d75379a5 RJ |
424 | */ |
425 | static void pio_irq_disable(struct pxa_ep *ep) | |
426 | { | |
427 | struct pxa_udc *udc = ep->dev; | |
428 | int index = EPIDX(ep); | |
429 | u32 udcicr0 = udc_readl(udc, UDCICR0); | |
430 | u32 udcicr1 = udc_readl(udc, UDCICR1); | |
431 | ||
432 | if (index < 16) | |
433 | udc_writel(udc, UDCICR0, udcicr0 & ~(3 << (index * 2))); | |
434 | else | |
435 | udc_writel(udc, UDCICR1, udcicr1 & ~(3 << ((index - 16) * 2))); | |
436 | } | |
437 | ||
438 | /** | |
439 | * udc_set_mask_UDCCR - set bits in UDCCR | |
440 | * @udc: udc device | |
441 | * @mask: bits to set in UDCCR | |
442 | * | |
443 | * Sets bits in UDCCR, leaving DME and FST bits as they were. | |
444 | */ | |
445 | static inline void udc_set_mask_UDCCR(struct pxa_udc *udc, int mask) | |
446 | { | |
447 | u32 udccr = udc_readl(udc, UDCCR); | |
448 | udc_writel(udc, UDCCR, | |
449 | (udccr & UDCCR_MASK_BITS) | (mask & UDCCR_MASK_BITS)); | |
450 | } | |
451 | ||
452 | /** | |
453 | * udc_clear_mask_UDCCR - clears bits in UDCCR | |
454 | * @udc: udc device | |
455 | * @mask: bit to clear in UDCCR | |
456 | * | |
457 | * Clears bits in UDCCR, leaving DME and FST bits as they were. | |
458 | */ | |
459 | static inline void udc_clear_mask_UDCCR(struct pxa_udc *udc, int mask) | |
460 | { | |
461 | u32 udccr = udc_readl(udc, UDCCR); | |
462 | udc_writel(udc, UDCCR, | |
463 | (udccr & UDCCR_MASK_BITS) & ~(mask & UDCCR_MASK_BITS)); | |
464 | } | |
465 | ||
367815ee RJ |
466 | /** |
467 | * ep_write_UDCCSR - set bits in UDCCSR | |
468 | * @udc: udc device | |
469 | * @mask: bits to set in UDCCR | |
470 | * | |
471 | * Sets bits in UDCCSR (UDCCSR0 and UDCCSR*). | |
472 | * | |
473 | * A specific case is applied to ep0 : the ACM bit is always set to 1, for | |
474 | * SET_INTERFACE and SET_CONFIGURATION. | |
475 | */ | |
476 | static inline void ep_write_UDCCSR(struct pxa_ep *ep, int mask) | |
477 | { | |
478 | if (is_ep0(ep)) | |
479 | mask |= UDCCSR0_ACM; | |
480 | udc_ep_writel(ep, UDCCSR, mask); | |
481 | } | |
482 | ||
d75379a5 RJ |
483 | /** |
484 | * ep_count_bytes_remain - get how many bytes in udc endpoint | |
485 | * @ep: udc endpoint | |
486 | * | |
487 | * Returns number of bytes in OUT fifos. Broken for IN fifos (-EOPNOTSUPP) | |
488 | */ | |
489 | static int ep_count_bytes_remain(struct pxa_ep *ep) | |
490 | { | |
491 | if (ep->dir_in) | |
492 | return -EOPNOTSUPP; | |
493 | return udc_ep_readl(ep, UDCBCR) & 0x3ff; | |
494 | } | |
495 | ||
496 | /** | |
497 | * ep_is_empty - checks if ep has byte ready for reading | |
498 | * @ep: udc endpoint | |
499 | * | |
500 | * If endpoint is the control endpoint, checks if there are bytes in the | |
501 | * control endpoint fifo. If endpoint is a data endpoint, checks if bytes | |
502 | * are ready for reading on OUT endpoint. | |
503 | * | |
504 | * Returns 0 if ep not empty, 1 if ep empty, -EOPNOTSUPP if IN endpoint | |
505 | */ | |
506 | static int ep_is_empty(struct pxa_ep *ep) | |
507 | { | |
508 | int ret; | |
509 | ||
510 | if (!is_ep0(ep) && ep->dir_in) | |
511 | return -EOPNOTSUPP; | |
512 | if (is_ep0(ep)) | |
513 | ret = !(udc_ep_readl(ep, UDCCSR) & UDCCSR0_RNE); | |
514 | else | |
515 | ret = !(udc_ep_readl(ep, UDCCSR) & UDCCSR_BNE); | |
516 | return ret; | |
517 | } | |
518 | ||
519 | /** | |
520 | * ep_is_full - checks if ep has place to write bytes | |
521 | * @ep: udc endpoint | |
522 | * | |
523 | * If endpoint is not the control endpoint and is an IN endpoint, checks if | |
524 | * there is place to write bytes into the endpoint. | |
525 | * | |
526 | * Returns 0 if ep not full, 1 if ep full, -EOPNOTSUPP if OUT endpoint | |
527 | */ | |
528 | static int ep_is_full(struct pxa_ep *ep) | |
529 | { | |
530 | if (is_ep0(ep)) | |
531 | return (udc_ep_readl(ep, UDCCSR) & UDCCSR0_IPR); | |
532 | if (!ep->dir_in) | |
533 | return -EOPNOTSUPP; | |
534 | return (!(udc_ep_readl(ep, UDCCSR) & UDCCSR_BNF)); | |
535 | } | |
536 | ||
537 | /** | |
538 | * epout_has_pkt - checks if OUT endpoint fifo has a packet available | |
539 | * @ep: pxa endpoint | |
540 | * | |
541 | * Returns 1 if a complete packet is available, 0 if not, -EOPNOTSUPP for IN ep. | |
542 | */ | |
543 | static int epout_has_pkt(struct pxa_ep *ep) | |
544 | { | |
545 | if (!is_ep0(ep) && ep->dir_in) | |
546 | return -EOPNOTSUPP; | |
547 | if (is_ep0(ep)) | |
548 | return (udc_ep_readl(ep, UDCCSR) & UDCCSR0_OPC); | |
549 | return (udc_ep_readl(ep, UDCCSR) & UDCCSR_PC); | |
550 | } | |
551 | ||
552 | /** | |
553 | * set_ep0state - Set ep0 automata state | |
554 | * @dev: udc device | |
555 | * @state: state | |
556 | */ | |
557 | static void set_ep0state(struct pxa_udc *udc, int state) | |
558 | { | |
559 | struct pxa_ep *ep = &udc->pxa_ep[0]; | |
560 | char *old_stname = EP0_STNAME(udc); | |
561 | ||
562 | udc->ep0state = state; | |
563 | ep_dbg(ep, "state=%s->%s, udccsr0=0x%03x, udcbcr=%d\n", old_stname, | |
564 | EP0_STNAME(udc), udc_ep_readl(ep, UDCCSR), | |
565 | udc_ep_readl(ep, UDCBCR)); | |
566 | } | |
567 | ||
568 | /** | |
569 | * ep0_idle - Put control endpoint into idle state | |
570 | * @dev: udc device | |
571 | */ | |
572 | static void ep0_idle(struct pxa_udc *dev) | |
573 | { | |
574 | set_ep0state(dev, WAIT_FOR_SETUP); | |
575 | } | |
576 | ||
577 | /** | |
578 | * inc_ep_stats_reqs - Update ep stats counts | |
579 | * @ep: physical endpoint | |
580 | * @req: usb request | |
581 | * @is_in: ep direction (USB_DIR_IN or 0) | |
582 | * | |
583 | */ | |
584 | static void inc_ep_stats_reqs(struct pxa_ep *ep, int is_in) | |
585 | { | |
586 | if (is_in) | |
587 | ep->stats.in_ops++; | |
588 | else | |
589 | ep->stats.out_ops++; | |
590 | } | |
591 | ||
592 | /** | |
593 | * inc_ep_stats_bytes - Update ep stats counts | |
594 | * @ep: physical endpoint | |
25985edc | 595 | * @count: bytes transferred on endpoint |
d75379a5 RJ |
596 | * @is_in: ep direction (USB_DIR_IN or 0) |
597 | */ | |
598 | static void inc_ep_stats_bytes(struct pxa_ep *ep, int count, int is_in) | |
599 | { | |
600 | if (is_in) | |
601 | ep->stats.in_bytes += count; | |
602 | else | |
603 | ep->stats.out_bytes += count; | |
604 | } | |
605 | ||
606 | /** | |
607 | * pxa_ep_setup - Sets up an usb physical endpoint | |
608 | * @ep: pxa27x physical endpoint | |
609 | * | |
610 | * Find the physical pxa27x ep, and setup its UDCCR | |
611 | */ | |
50757b24 | 612 | static void pxa_ep_setup(struct pxa_ep *ep) |
d75379a5 RJ |
613 | { |
614 | u32 new_udccr; | |
615 | ||
616 | new_udccr = ((ep->config << UDCCONR_CN_S) & UDCCONR_CN) | |
617 | | ((ep->interface << UDCCONR_IN_S) & UDCCONR_IN) | |
618 | | ((ep->alternate << UDCCONR_AISN_S) & UDCCONR_AISN) | |
619 | | ((EPADDR(ep) << UDCCONR_EN_S) & UDCCONR_EN) | |
620 | | ((EPXFERTYPE(ep) << UDCCONR_ET_S) & UDCCONR_ET) | |
621 | | ((ep->dir_in) ? UDCCONR_ED : 0) | |
622 | | ((ep->fifo_size << UDCCONR_MPS_S) & UDCCONR_MPS) | |
623 | | UDCCONR_EE; | |
624 | ||
625 | udc_ep_writel(ep, UDCCR, new_udccr); | |
626 | } | |
627 | ||
628 | /** | |
629 | * pxa_eps_setup - Sets up all usb physical endpoints | |
630 | * @dev: udc device | |
631 | * | |
632 | * Setup all pxa physical endpoints, except ep0 | |
633 | */ | |
50757b24 | 634 | static void pxa_eps_setup(struct pxa_udc *dev) |
d75379a5 RJ |
635 | { |
636 | unsigned int i; | |
637 | ||
638 | dev_dbg(dev->dev, "%s: dev=%p\n", __func__, dev); | |
639 | ||
640 | for (i = 1; i < NR_PXA_ENDPOINTS; i++) | |
641 | pxa_ep_setup(&dev->pxa_ep[i]); | |
642 | } | |
643 | ||
644 | /** | |
645 | * pxa_ep_alloc_request - Allocate usb request | |
646 | * @_ep: usb endpoint | |
647 | * @gfp_flags: | |
648 | * | |
649 | * For the pxa27x, these can just wrap kmalloc/kfree. gadget drivers | |
650 | * must still pass correctly initialized endpoints, since other controller | |
651 | * drivers may care about how it's currently set up (dma issues etc). | |
652 | */ | |
653 | static struct usb_request * | |
654 | pxa_ep_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) | |
655 | { | |
656 | struct pxa27x_request *req; | |
657 | ||
658 | req = kzalloc(sizeof *req, gfp_flags); | |
3131f7b0 | 659 | if (!req) |
d75379a5 RJ |
660 | return NULL; |
661 | ||
662 | INIT_LIST_HEAD(&req->queue); | |
663 | req->in_use = 0; | |
664 | req->udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); | |
665 | ||
666 | return &req->req; | |
667 | } | |
668 | ||
669 | /** | |
670 | * pxa_ep_free_request - Free usb request | |
671 | * @_ep: usb endpoint | |
672 | * @_req: usb request | |
673 | * | |
674 | * Wrapper around kfree to free _req | |
675 | */ | |
676 | static void pxa_ep_free_request(struct usb_ep *_ep, struct usb_request *_req) | |
677 | { | |
678 | struct pxa27x_request *req; | |
679 | ||
680 | req = container_of(_req, struct pxa27x_request, req); | |
681 | WARN_ON(!list_empty(&req->queue)); | |
682 | kfree(req); | |
683 | } | |
684 | ||
685 | /** | |
686 | * ep_add_request - add a request to the endpoint's queue | |
687 | * @ep: usb endpoint | |
688 | * @req: usb request | |
689 | * | |
690 | * Context: ep->lock held | |
691 | * | |
692 | * Queues the request in the endpoint's queue, and enables the interrupts | |
693 | * on the endpoint. | |
694 | */ | |
695 | static void ep_add_request(struct pxa_ep *ep, struct pxa27x_request *req) | |
696 | { | |
697 | if (unlikely(!req)) | |
698 | return; | |
699 | ep_vdbg(ep, "req:%p, lg=%d, udccsr=0x%03x\n", req, | |
700 | req->req.length, udc_ep_readl(ep, UDCCSR)); | |
701 | ||
702 | req->in_use = 1; | |
703 | list_add_tail(&req->queue, &ep->queue); | |
704 | pio_irq_enable(ep); | |
705 | } | |
706 | ||
707 | /** | |
708 | * ep_del_request - removes a request from the endpoint's queue | |
709 | * @ep: usb endpoint | |
710 | * @req: usb request | |
711 | * | |
712 | * Context: ep->lock held | |
713 | * | |
714 | * Unqueue the request from the endpoint's queue. If there are no more requests | |
715 | * on the endpoint, and if it's not the control endpoint, interrupts are | |
716 | * disabled on the endpoint. | |
717 | */ | |
718 | static void ep_del_request(struct pxa_ep *ep, struct pxa27x_request *req) | |
719 | { | |
720 | if (unlikely(!req)) | |
721 | return; | |
722 | ep_vdbg(ep, "req:%p, lg=%d, udccsr=0x%03x\n", req, | |
723 | req->req.length, udc_ep_readl(ep, UDCCSR)); | |
724 | ||
725 | list_del_init(&req->queue); | |
726 | req->in_use = 0; | |
727 | if (!is_ep0(ep) && list_empty(&ep->queue)) | |
728 | pio_irq_disable(ep); | |
729 | } | |
730 | ||
731 | /** | |
732 | * req_done - Complete an usb request | |
733 | * @ep: pxa physical endpoint | |
734 | * @req: pxa request | |
735 | * @status: usb request status sent to gadget API | |
5e23e90f | 736 | * @pflags: flags of previous spinlock_irq_save() or NULL if no lock held |
d75379a5 | 737 | * |
5e23e90f | 738 | * Context: ep->lock held if flags not NULL, else ep->lock released |
d75379a5 RJ |
739 | * |
740 | * Retire a pxa27x usb request. Endpoint must be locked. | |
741 | */ | |
5e23e90f RJ |
742 | static void req_done(struct pxa_ep *ep, struct pxa27x_request *req, int status, |
743 | unsigned long *pflags) | |
d75379a5 | 744 | { |
5e23e90f RJ |
745 | unsigned long flags; |
746 | ||
d75379a5 RJ |
747 | ep_del_request(ep, req); |
748 | if (likely(req->req.status == -EINPROGRESS)) | |
749 | req->req.status = status; | |
750 | else | |
751 | status = req->req.status; | |
752 | ||
753 | if (status && status != -ESHUTDOWN) | |
754 | ep_dbg(ep, "complete req %p stat %d len %u/%u\n", | |
755 | &req->req, status, | |
756 | req->req.actual, req->req.length); | |
757 | ||
5e23e90f RJ |
758 | if (pflags) |
759 | spin_unlock_irqrestore(&ep->lock, *pflags); | |
760 | local_irq_save(flags); | |
d75379a5 | 761 | req->req.complete(&req->udc_usb_ep->usb_ep, &req->req); |
5e23e90f RJ |
762 | local_irq_restore(flags); |
763 | if (pflags) | |
764 | spin_lock_irqsave(&ep->lock, *pflags); | |
d75379a5 RJ |
765 | } |
766 | ||
767 | /** | |
4c24b6d0 | 768 | * ep_end_out_req - Ends endpoint OUT request |
d75379a5 RJ |
769 | * @ep: physical endpoint |
770 | * @req: pxa request | |
5e23e90f | 771 | * @pflags: flags of previous spinlock_irq_save() or NULL if no lock held |
d75379a5 | 772 | * |
5e23e90f | 773 | * Context: ep->lock held or released (see req_done()) |
d75379a5 | 774 | * |
4c24b6d0 | 775 | * Ends endpoint OUT request (completes usb request). |
d75379a5 | 776 | */ |
5e23e90f RJ |
777 | static void ep_end_out_req(struct pxa_ep *ep, struct pxa27x_request *req, |
778 | unsigned long *pflags) | |
d75379a5 RJ |
779 | { |
780 | inc_ep_stats_reqs(ep, !USB_DIR_IN); | |
5e23e90f | 781 | req_done(ep, req, 0, pflags); |
d75379a5 RJ |
782 | } |
783 | ||
784 | /** | |
4c24b6d0 | 785 | * ep0_end_out_req - Ends control endpoint OUT request (ends data stage) |
d75379a5 RJ |
786 | * @ep: physical endpoint |
787 | * @req: pxa request | |
5e23e90f | 788 | * @pflags: flags of previous spinlock_irq_save() or NULL if no lock held |
d75379a5 | 789 | * |
5e23e90f | 790 | * Context: ep->lock held or released (see req_done()) |
d75379a5 | 791 | * |
4c24b6d0 | 792 | * Ends control endpoint OUT request (completes usb request), and puts |
d75379a5 RJ |
793 | * control endpoint into idle state |
794 | */ | |
5e23e90f RJ |
795 | static void ep0_end_out_req(struct pxa_ep *ep, struct pxa27x_request *req, |
796 | unsigned long *pflags) | |
d75379a5 RJ |
797 | { |
798 | set_ep0state(ep->dev, OUT_STATUS_STAGE); | |
5e23e90f | 799 | ep_end_out_req(ep, req, pflags); |
d75379a5 RJ |
800 | ep0_idle(ep->dev); |
801 | } | |
802 | ||
803 | /** | |
4c24b6d0 | 804 | * ep_end_in_req - Ends endpoint IN request |
d75379a5 RJ |
805 | * @ep: physical endpoint |
806 | * @req: pxa request | |
5e23e90f | 807 | * @pflags: flags of previous spinlock_irq_save() or NULL if no lock held |
d75379a5 | 808 | * |
5e23e90f | 809 | * Context: ep->lock held or released (see req_done()) |
d75379a5 | 810 | * |
4c24b6d0 | 811 | * Ends endpoint IN request (completes usb request). |
d75379a5 | 812 | */ |
5e23e90f RJ |
813 | static void ep_end_in_req(struct pxa_ep *ep, struct pxa27x_request *req, |
814 | unsigned long *pflags) | |
d75379a5 RJ |
815 | { |
816 | inc_ep_stats_reqs(ep, USB_DIR_IN); | |
5e23e90f | 817 | req_done(ep, req, 0, pflags); |
d75379a5 RJ |
818 | } |
819 | ||
820 | /** | |
4c24b6d0 | 821 | * ep0_end_in_req - Ends control endpoint IN request (ends data stage) |
d75379a5 RJ |
822 | * @ep: physical endpoint |
823 | * @req: pxa request | |
5e23e90f | 824 | * @pflags: flags of previous spinlock_irq_save() or NULL if no lock held |
d75379a5 | 825 | * |
5e23e90f | 826 | * Context: ep->lock held or released (see req_done()) |
d75379a5 | 827 | * |
4c24b6d0 | 828 | * Ends control endpoint IN request (completes usb request), and puts |
d75379a5 RJ |
829 | * control endpoint into status state |
830 | */ | |
5e23e90f RJ |
831 | static void ep0_end_in_req(struct pxa_ep *ep, struct pxa27x_request *req, |
832 | unsigned long *pflags) | |
d75379a5 | 833 | { |
4c24b6d0 | 834 | set_ep0state(ep->dev, IN_STATUS_STAGE); |
5e23e90f | 835 | ep_end_in_req(ep, req, pflags); |
d75379a5 RJ |
836 | } |
837 | ||
838 | /** | |
839 | * nuke - Dequeue all requests | |
840 | * @ep: pxa endpoint | |
841 | * @status: usb request status | |
842 | * | |
5e23e90f | 843 | * Context: ep->lock released |
d75379a5 RJ |
844 | * |
845 | * Dequeues all requests on an endpoint. As a side effect, interrupts will be | |
846 | * disabled on that endpoint (because no more requests). | |
847 | */ | |
848 | static void nuke(struct pxa_ep *ep, int status) | |
849 | { | |
5e23e90f RJ |
850 | struct pxa27x_request *req; |
851 | unsigned long flags; | |
d75379a5 | 852 | |
5e23e90f | 853 | spin_lock_irqsave(&ep->lock, flags); |
d75379a5 RJ |
854 | while (!list_empty(&ep->queue)) { |
855 | req = list_entry(ep->queue.next, struct pxa27x_request, queue); | |
5e23e90f | 856 | req_done(ep, req, status, &flags); |
d75379a5 | 857 | } |
5e23e90f | 858 | spin_unlock_irqrestore(&ep->lock, flags); |
d75379a5 RJ |
859 | } |
860 | ||
861 | /** | |
862 | * read_packet - transfer 1 packet from an OUT endpoint into request | |
863 | * @ep: pxa physical endpoint | |
864 | * @req: usb request | |
865 | * | |
866 | * Takes bytes from OUT endpoint and transfers them info the usb request. | |
867 | * If there is less space in request than bytes received in OUT endpoint, | |
868 | * bytes are left in the OUT endpoint. | |
869 | * | |
25985edc | 870 | * Returns how many bytes were actually transferred |
d75379a5 RJ |
871 | */ |
872 | static int read_packet(struct pxa_ep *ep, struct pxa27x_request *req) | |
873 | { | |
874 | u32 *buf; | |
875 | int bytes_ep, bufferspace, count, i; | |
876 | ||
877 | bytes_ep = ep_count_bytes_remain(ep); | |
878 | bufferspace = req->req.length - req->req.actual; | |
879 | ||
880 | buf = (u32 *)(req->req.buf + req->req.actual); | |
881 | prefetchw(buf); | |
882 | ||
883 | if (likely(!ep_is_empty(ep))) | |
884 | count = min(bytes_ep, bufferspace); | |
885 | else /* zlp */ | |
886 | count = 0; | |
887 | ||
888 | for (i = count; i > 0; i -= 4) | |
889 | *buf++ = udc_ep_readl(ep, UDCDR); | |
890 | req->req.actual += count; | |
891 | ||
367815ee | 892 | ep_write_UDCCSR(ep, UDCCSR_PC); |
d75379a5 RJ |
893 | |
894 | return count; | |
895 | } | |
896 | ||
897 | /** | |
898 | * write_packet - transfer 1 packet from request into an IN endpoint | |
899 | * @ep: pxa physical endpoint | |
900 | * @req: usb request | |
901 | * @max: max bytes that fit into endpoint | |
902 | * | |
903 | * Takes bytes from usb request, and transfers them into the physical | |
904 | * endpoint. If there are no bytes to transfer, doesn't write anything | |
905 | * to physical endpoint. | |
906 | * | |
25985edc | 907 | * Returns how many bytes were actually transferred. |
d75379a5 RJ |
908 | */ |
909 | static int write_packet(struct pxa_ep *ep, struct pxa27x_request *req, | |
910 | unsigned int max) | |
911 | { | |
912 | int length, count, remain, i; | |
913 | u32 *buf; | |
914 | u8 *buf_8; | |
915 | ||
916 | buf = (u32 *)(req->req.buf + req->req.actual); | |
917 | prefetch(buf); | |
918 | ||
919 | length = min(req->req.length - req->req.actual, max); | |
920 | req->req.actual += length; | |
921 | ||
922 | remain = length & 0x3; | |
923 | count = length & ~(0x3); | |
924 | for (i = count; i > 0 ; i -= 4) | |
925 | udc_ep_writel(ep, UDCDR, *buf++); | |
926 | ||
927 | buf_8 = (u8 *)buf; | |
928 | for (i = remain; i > 0; i--) | |
929 | udc_ep_writeb(ep, UDCDR, *buf_8++); | |
930 | ||
931 | ep_vdbg(ep, "length=%d+%d, udccsr=0x%03x\n", count, remain, | |
932 | udc_ep_readl(ep, UDCCSR)); | |
933 | ||
934 | return length; | |
935 | } | |
936 | ||
937 | /** | |
938 | * read_fifo - Transfer packets from OUT endpoint into usb request | |
939 | * @ep: pxa physical endpoint | |
940 | * @req: usb request | |
941 | * | |
942 | * Context: callable when in_interrupt() | |
943 | * | |
944 | * Unload as many packets as possible from the fifo we use for usb OUT | |
945 | * transfers and put them into the request. Caller should have made sure | |
946 | * there's at least one packet ready. | |
947 | * Doesn't complete the request, that's the caller's job | |
948 | * | |
949 | * Returns 1 if the request completed, 0 otherwise | |
950 | */ | |
951 | static int read_fifo(struct pxa_ep *ep, struct pxa27x_request *req) | |
952 | { | |
953 | int count, is_short, completed = 0; | |
954 | ||
955 | while (epout_has_pkt(ep)) { | |
956 | count = read_packet(ep, req); | |
957 | inc_ep_stats_bytes(ep, count, !USB_DIR_IN); | |
958 | ||
959 | is_short = (count < ep->fifo_size); | |
960 | ep_dbg(ep, "read udccsr:%03x, count:%d bytes%s req %p %d/%d\n", | |
961 | udc_ep_readl(ep, UDCCSR), count, is_short ? "/S" : "", | |
962 | &req->req, req->req.actual, req->req.length); | |
963 | ||
964 | /* completion */ | |
965 | if (is_short || req->req.actual == req->req.length) { | |
966 | completed = 1; | |
967 | break; | |
968 | } | |
969 | /* finished that packet. the next one may be waiting... */ | |
970 | } | |
971 | return completed; | |
972 | } | |
973 | ||
974 | /** | |
975 | * write_fifo - transfer packets from usb request into an IN endpoint | |
976 | * @ep: pxa physical endpoint | |
977 | * @req: pxa usb request | |
978 | * | |
979 | * Write to an IN endpoint fifo, as many packets as possible. | |
980 | * irqs will use this to write the rest later. | |
981 | * caller guarantees at least one packet buffer is ready (or a zlp). | |
982 | * Doesn't complete the request, that's the caller's job | |
983 | * | |
25985edc | 984 | * Returns 1 if request fully transferred, 0 if partial transfer |
d75379a5 RJ |
985 | */ |
986 | static int write_fifo(struct pxa_ep *ep, struct pxa27x_request *req) | |
987 | { | |
988 | unsigned max; | |
989 | int count, is_short, is_last = 0, completed = 0, totcount = 0; | |
990 | u32 udccsr; | |
991 | ||
992 | max = ep->fifo_size; | |
993 | do { | |
994 | is_short = 0; | |
995 | ||
996 | udccsr = udc_ep_readl(ep, UDCCSR); | |
997 | if (udccsr & UDCCSR_PC) { | |
998 | ep_vdbg(ep, "Clearing Transmit Complete, udccsr=%x\n", | |
999 | udccsr); | |
367815ee | 1000 | ep_write_UDCCSR(ep, UDCCSR_PC); |
d75379a5 RJ |
1001 | } |
1002 | if (udccsr & UDCCSR_TRN) { | |
1003 | ep_vdbg(ep, "Clearing Underrun on, udccsr=%x\n", | |
1004 | udccsr); | |
367815ee | 1005 | ep_write_UDCCSR(ep, UDCCSR_TRN); |
d75379a5 RJ |
1006 | } |
1007 | ||
1008 | count = write_packet(ep, req, max); | |
1009 | inc_ep_stats_bytes(ep, count, USB_DIR_IN); | |
1010 | totcount += count; | |
1011 | ||
1012 | /* last packet is usually short (or a zlp) */ | |
1013 | if (unlikely(count < max)) { | |
1014 | is_last = 1; | |
1015 | is_short = 1; | |
1016 | } else { | |
1017 | if (likely(req->req.length > req->req.actual) | |
1018 | || req->req.zero) | |
1019 | is_last = 0; | |
1020 | else | |
1021 | is_last = 1; | |
1022 | /* interrupt/iso maxpacket may not fill the fifo */ | |
1023 | is_short = unlikely(max < ep->fifo_size); | |
1024 | } | |
1025 | ||
1026 | if (is_short) | |
367815ee | 1027 | ep_write_UDCCSR(ep, UDCCSR_SP); |
d75379a5 RJ |
1028 | |
1029 | /* requests complete when all IN data is in the FIFO */ | |
1030 | if (is_last) { | |
1031 | completed = 1; | |
1032 | break; | |
1033 | } | |
1034 | } while (!ep_is_full(ep)); | |
1035 | ||
1036 | ep_dbg(ep, "wrote count:%d bytes%s%s, left:%d req=%p\n", | |
1037 | totcount, is_last ? "/L" : "", is_short ? "/S" : "", | |
1038 | req->req.length - req->req.actual, &req->req); | |
1039 | ||
1040 | return completed; | |
1041 | } | |
1042 | ||
1043 | /** | |
1044 | * read_ep0_fifo - Transfer packets from control endpoint into usb request | |
1045 | * @ep: control endpoint | |
1046 | * @req: pxa usb request | |
1047 | * | |
1048 | * Special ep0 version of the above read_fifo. Reads as many bytes from control | |
1049 | * endpoint as can be read, and stores them into usb request (limited by request | |
1050 | * maximum length). | |
1051 | * | |
1052 | * Returns 0 if usb request only partially filled, 1 if fully filled | |
1053 | */ | |
1054 | static int read_ep0_fifo(struct pxa_ep *ep, struct pxa27x_request *req) | |
1055 | { | |
1056 | int count, is_short, completed = 0; | |
1057 | ||
1058 | while (epout_has_pkt(ep)) { | |
1059 | count = read_packet(ep, req); | |
367815ee | 1060 | ep_write_UDCCSR(ep, UDCCSR0_OPC); |
d75379a5 RJ |
1061 | inc_ep_stats_bytes(ep, count, !USB_DIR_IN); |
1062 | ||
1063 | is_short = (count < ep->fifo_size); | |
1064 | ep_dbg(ep, "read udccsr:%03x, count:%d bytes%s req %p %d/%d\n", | |
1065 | udc_ep_readl(ep, UDCCSR), count, is_short ? "/S" : "", | |
1066 | &req->req, req->req.actual, req->req.length); | |
1067 | ||
1068 | if (is_short || req->req.actual >= req->req.length) { | |
1069 | completed = 1; | |
1070 | break; | |
1071 | } | |
1072 | } | |
1073 | ||
1074 | return completed; | |
1075 | } | |
1076 | ||
1077 | /** | |
1078 | * write_ep0_fifo - Send a request to control endpoint (ep0 in) | |
1079 | * @ep: control endpoint | |
1080 | * @req: request | |
1081 | * | |
1082 | * Context: callable when in_interrupt() | |
1083 | * | |
1084 | * Sends a request (or a part of the request) to the control endpoint (ep0 in). | |
1085 | * If the request doesn't fit, the remaining part will be sent from irq. | |
1086 | * The request is considered fully written only if either : | |
25985edc | 1087 | * - last write transferred all remaining bytes, but fifo was not fully filled |
d75379a5 RJ |
1088 | * - last write was a 0 length write |
1089 | * | |
1090 | * Returns 1 if request fully written, 0 if request only partially sent | |
1091 | */ | |
1092 | static int write_ep0_fifo(struct pxa_ep *ep, struct pxa27x_request *req) | |
1093 | { | |
1094 | unsigned count; | |
1095 | int is_last, is_short; | |
1096 | ||
1097 | count = write_packet(ep, req, EP0_FIFO_SIZE); | |
1098 | inc_ep_stats_bytes(ep, count, USB_DIR_IN); | |
1099 | ||
1100 | is_short = (count < EP0_FIFO_SIZE); | |
1101 | is_last = ((count == 0) || (count < EP0_FIFO_SIZE)); | |
1102 | ||
1103 | /* Sends either a short packet or a 0 length packet */ | |
1104 | if (unlikely(is_short)) | |
367815ee | 1105 | ep_write_UDCCSR(ep, UDCCSR0_IPR); |
d75379a5 RJ |
1106 | |
1107 | ep_dbg(ep, "in %d bytes%s%s, %d left, req=%p, udccsr0=0x%03x\n", | |
1108 | count, is_short ? "/S" : "", is_last ? "/L" : "", | |
1109 | req->req.length - req->req.actual, | |
1110 | &req->req, udc_ep_readl(ep, UDCCSR)); | |
1111 | ||
1112 | return is_last; | |
1113 | } | |
1114 | ||
1115 | /** | |
1116 | * pxa_ep_queue - Queue a request into an IN endpoint | |
1117 | * @_ep: usb endpoint | |
1118 | * @_req: usb request | |
1119 | * @gfp_flags: flags | |
1120 | * | |
1121 | * Context: normally called when !in_interrupt, but callable when in_interrupt() | |
1122 | * in the special case of ep0 setup : | |
1123 | * (irq->handle_ep0_ctrl_req->gadget_setup->pxa_ep_queue) | |
1124 | * | |
1125 | * Returns 0 if succedeed, error otherwise | |
1126 | */ | |
1127 | static int pxa_ep_queue(struct usb_ep *_ep, struct usb_request *_req, | |
1128 | gfp_t gfp_flags) | |
1129 | { | |
1130 | struct udc_usb_ep *udc_usb_ep; | |
1131 | struct pxa_ep *ep; | |
1132 | struct pxa27x_request *req; | |
1133 | struct pxa_udc *dev; | |
1134 | unsigned long flags; | |
1135 | int rc = 0; | |
1136 | int is_first_req; | |
1137 | unsigned length; | |
5e23e90f | 1138 | int recursion_detected; |
d75379a5 RJ |
1139 | |
1140 | req = container_of(_req, struct pxa27x_request, req); | |
1141 | udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); | |
1142 | ||
1143 | if (unlikely(!_req || !_req->complete || !_req->buf)) | |
1144 | return -EINVAL; | |
1145 | ||
1146 | if (unlikely(!_ep)) | |
1147 | return -EINVAL; | |
1148 | ||
1149 | dev = udc_usb_ep->dev; | |
1150 | ep = udc_usb_ep->pxa_ep; | |
1151 | if (unlikely(!ep)) | |
1152 | return -EINVAL; | |
1153 | ||
1154 | dev = ep->dev; | |
1155 | if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) { | |
1156 | ep_dbg(ep, "bogus device state\n"); | |
1157 | return -ESHUTDOWN; | |
1158 | } | |
1159 | ||
1160 | /* iso is always one packet per request, that's the only way | |
1161 | * we can report per-packet status. that also helps with dma. | |
1162 | */ | |
1163 | if (unlikely(EPXFERTYPE_is_ISO(ep) | |
1164 | && req->req.length > ep->fifo_size)) | |
1165 | return -EMSGSIZE; | |
1166 | ||
1167 | spin_lock_irqsave(&ep->lock, flags); | |
5e23e90f | 1168 | recursion_detected = ep->in_handle_ep; |
d75379a5 RJ |
1169 | |
1170 | is_first_req = list_empty(&ep->queue); | |
1171 | ep_dbg(ep, "queue req %p(first=%s), len %d buf %p\n", | |
1172 | _req, is_first_req ? "yes" : "no", | |
1173 | _req->length, _req->buf); | |
1174 | ||
1175 | if (!ep->enabled) { | |
1176 | _req->status = -ESHUTDOWN; | |
1177 | rc = -ESHUTDOWN; | |
5e23e90f | 1178 | goto out_locked; |
d75379a5 RJ |
1179 | } |
1180 | ||
1181 | if (req->in_use) { | |
1182 | ep_err(ep, "refusing to queue req %p (already queued)\n", req); | |
5e23e90f | 1183 | goto out_locked; |
d75379a5 RJ |
1184 | } |
1185 | ||
1186 | length = _req->length; | |
1187 | _req->status = -EINPROGRESS; | |
1188 | _req->actual = 0; | |
1189 | ||
1190 | ep_add_request(ep, req); | |
5e23e90f | 1191 | spin_unlock_irqrestore(&ep->lock, flags); |
d75379a5 RJ |
1192 | |
1193 | if (is_ep0(ep)) { | |
1194 | switch (dev->ep0state) { | |
1195 | case WAIT_ACK_SET_CONF_INTERF: | |
1196 | if (length == 0) { | |
5e23e90f | 1197 | ep_end_in_req(ep, req, NULL); |
d75379a5 RJ |
1198 | } else { |
1199 | ep_err(ep, "got a request of %d bytes while" | |
4c24b6d0 | 1200 | "in state WAIT_ACK_SET_CONF_INTERF\n", |
d75379a5 RJ |
1201 | length); |
1202 | ep_del_request(ep, req); | |
1203 | rc = -EL2HLT; | |
1204 | } | |
1205 | ep0_idle(ep->dev); | |
1206 | break; | |
1207 | case IN_DATA_STAGE: | |
1208 | if (!ep_is_full(ep)) | |
1209 | if (write_ep0_fifo(ep, req)) | |
5e23e90f | 1210 | ep0_end_in_req(ep, req, NULL); |
d75379a5 RJ |
1211 | break; |
1212 | case OUT_DATA_STAGE: | |
1213 | if ((length == 0) || !epout_has_pkt(ep)) | |
1214 | if (read_ep0_fifo(ep, req)) | |
5e23e90f | 1215 | ep0_end_out_req(ep, req, NULL); |
d75379a5 RJ |
1216 | break; |
1217 | default: | |
1218 | ep_err(ep, "odd state %s to send me a request\n", | |
1219 | EP0_STNAME(ep->dev)); | |
1220 | ep_del_request(ep, req); | |
1221 | rc = -EL2HLT; | |
1222 | break; | |
1223 | } | |
1224 | } else { | |
5e23e90f RJ |
1225 | if (!recursion_detected) |
1226 | handle_ep(ep); | |
d75379a5 RJ |
1227 | } |
1228 | ||
1229 | out: | |
d75379a5 | 1230 | return rc; |
5e23e90f RJ |
1231 | out_locked: |
1232 | spin_unlock_irqrestore(&ep->lock, flags); | |
1233 | goto out; | |
d75379a5 RJ |
1234 | } |
1235 | ||
1236 | /** | |
1237 | * pxa_ep_dequeue - Dequeue one request | |
1238 | * @_ep: usb endpoint | |
1239 | * @_req: usb request | |
1240 | * | |
1241 | * Return 0 if no error, -EINVAL or -ECONNRESET otherwise | |
1242 | */ | |
1243 | static int pxa_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) | |
1244 | { | |
1245 | struct pxa_ep *ep; | |
1246 | struct udc_usb_ep *udc_usb_ep; | |
1247 | struct pxa27x_request *req; | |
1248 | unsigned long flags; | |
4c24b6d0 | 1249 | int rc = -EINVAL; |
d75379a5 RJ |
1250 | |
1251 | if (!_ep) | |
4c24b6d0 | 1252 | return rc; |
d75379a5 RJ |
1253 | udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); |
1254 | ep = udc_usb_ep->pxa_ep; | |
1255 | if (!ep || is_ep0(ep)) | |
4c24b6d0 | 1256 | return rc; |
d75379a5 RJ |
1257 | |
1258 | spin_lock_irqsave(&ep->lock, flags); | |
1259 | ||
1260 | /* make sure it's actually queued on this endpoint */ | |
1261 | list_for_each_entry(req, &ep->queue, queue) { | |
4c24b6d0 | 1262 | if (&req->req == _req) { |
4c24b6d0 | 1263 | rc = 0; |
d75379a5 | 1264 | break; |
4c24b6d0 | 1265 | } |
d75379a5 RJ |
1266 | } |
1267 | ||
d75379a5 | 1268 | spin_unlock_irqrestore(&ep->lock, flags); |
5e23e90f RJ |
1269 | if (!rc) |
1270 | req_done(ep, req, -ECONNRESET, NULL); | |
d75379a5 RJ |
1271 | return rc; |
1272 | } | |
1273 | ||
1274 | /** | |
1275 | * pxa_ep_set_halt - Halts operations on one endpoint | |
1276 | * @_ep: usb endpoint | |
1277 | * @value: | |
1278 | * | |
1279 | * Returns 0 if no error, -EINVAL, -EROFS, -EAGAIN otherwise | |
1280 | */ | |
1281 | static int pxa_ep_set_halt(struct usb_ep *_ep, int value) | |
1282 | { | |
1283 | struct pxa_ep *ep; | |
1284 | struct udc_usb_ep *udc_usb_ep; | |
1285 | unsigned long flags; | |
1286 | int rc; | |
1287 | ||
1288 | ||
1289 | if (!_ep) | |
1290 | return -EINVAL; | |
1291 | udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); | |
1292 | ep = udc_usb_ep->pxa_ep; | |
1293 | if (!ep || is_ep0(ep)) | |
1294 | return -EINVAL; | |
1295 | ||
1296 | if (value == 0) { | |
1297 | /* | |
1298 | * This path (reset toggle+halt) is needed to implement | |
1299 | * SET_INTERFACE on normal hardware. but it can't be | |
1300 | * done from software on the PXA UDC, and the hardware | |
1301 | * forgets to do it as part of SET_INTERFACE automagic. | |
1302 | */ | |
1303 | ep_dbg(ep, "only host can clear halt\n"); | |
1304 | return -EROFS; | |
1305 | } | |
1306 | ||
1307 | spin_lock_irqsave(&ep->lock, flags); | |
1308 | ||
1309 | rc = -EAGAIN; | |
1310 | if (ep->dir_in && (ep_is_full(ep) || !list_empty(&ep->queue))) | |
1311 | goto out; | |
1312 | ||
1313 | /* FST, FEF bits are the same for control and non control endpoints */ | |
1314 | rc = 0; | |
367815ee | 1315 | ep_write_UDCCSR(ep, UDCCSR_FST | UDCCSR_FEF); |
d75379a5 RJ |
1316 | if (is_ep0(ep)) |
1317 | set_ep0state(ep->dev, STALL); | |
1318 | ||
1319 | out: | |
1320 | spin_unlock_irqrestore(&ep->lock, flags); | |
1321 | return rc; | |
1322 | } | |
1323 | ||
1324 | /** | |
1325 | * pxa_ep_fifo_status - Get how many bytes in physical endpoint | |
1326 | * @_ep: usb endpoint | |
1327 | * | |
1328 | * Returns number of bytes in OUT fifos. Broken for IN fifos. | |
1329 | */ | |
1330 | static int pxa_ep_fifo_status(struct usb_ep *_ep) | |
1331 | { | |
1332 | struct pxa_ep *ep; | |
1333 | struct udc_usb_ep *udc_usb_ep; | |
1334 | ||
1335 | if (!_ep) | |
1336 | return -ENODEV; | |
1337 | udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); | |
1338 | ep = udc_usb_ep->pxa_ep; | |
1339 | if (!ep || is_ep0(ep)) | |
1340 | return -ENODEV; | |
1341 | ||
1342 | if (ep->dir_in) | |
1343 | return -EOPNOTSUPP; | |
1344 | if (ep->dev->gadget.speed == USB_SPEED_UNKNOWN || ep_is_empty(ep)) | |
1345 | return 0; | |
1346 | else | |
1347 | return ep_count_bytes_remain(ep) + 1; | |
1348 | } | |
1349 | ||
1350 | /** | |
1351 | * pxa_ep_fifo_flush - Flushes one endpoint | |
1352 | * @_ep: usb endpoint | |
1353 | * | |
1354 | * Discards all data in one endpoint(IN or OUT), except control endpoint. | |
1355 | */ | |
1356 | static void pxa_ep_fifo_flush(struct usb_ep *_ep) | |
1357 | { | |
1358 | struct pxa_ep *ep; | |
1359 | struct udc_usb_ep *udc_usb_ep; | |
1360 | unsigned long flags; | |
1361 | ||
1362 | if (!_ep) | |
1363 | return; | |
1364 | udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); | |
1365 | ep = udc_usb_ep->pxa_ep; | |
1366 | if (!ep || is_ep0(ep)) | |
1367 | return; | |
1368 | ||
1369 | spin_lock_irqsave(&ep->lock, flags); | |
1370 | ||
1371 | if (unlikely(!list_empty(&ep->queue))) | |
1372 | ep_dbg(ep, "called while queue list not empty\n"); | |
1373 | ep_dbg(ep, "called\n"); | |
1374 | ||
1375 | /* for OUT, just read and discard the FIFO contents. */ | |
1376 | if (!ep->dir_in) { | |
1377 | while (!ep_is_empty(ep)) | |
1378 | udc_ep_readl(ep, UDCDR); | |
1379 | } else { | |
1380 | /* most IN status is the same, but ISO can't stall */ | |
367815ee | 1381 | ep_write_UDCCSR(ep, |
d75379a5 RJ |
1382 | UDCCSR_PC | UDCCSR_FEF | UDCCSR_TRN |
1383 | | (EPXFERTYPE_is_ISO(ep) ? 0 : UDCCSR_SST)); | |
1384 | } | |
1385 | ||
1386 | spin_unlock_irqrestore(&ep->lock, flags); | |
d75379a5 RJ |
1387 | } |
1388 | ||
1389 | /** | |
1390 | * pxa_ep_enable - Enables usb endpoint | |
1391 | * @_ep: usb endpoint | |
1392 | * @desc: usb endpoint descriptor | |
1393 | * | |
1394 | * Nothing much to do here, as ep configuration is done once and for all | |
1395 | * before udc is enabled. After udc enable, no physical endpoint configuration | |
1396 | * can be changed. | |
1397 | * Function makes sanity checks and flushes the endpoint. | |
1398 | */ | |
1399 | static int pxa_ep_enable(struct usb_ep *_ep, | |
1400 | const struct usb_endpoint_descriptor *desc) | |
1401 | { | |
1402 | struct pxa_ep *ep; | |
1403 | struct udc_usb_ep *udc_usb_ep; | |
1404 | struct pxa_udc *udc; | |
1405 | ||
1406 | if (!_ep || !desc) | |
1407 | return -EINVAL; | |
1408 | ||
1409 | udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); | |
1410 | if (udc_usb_ep->pxa_ep) { | |
1411 | ep = udc_usb_ep->pxa_ep; | |
1412 | ep_warn(ep, "usb_ep %s already enabled, doing nothing\n", | |
1413 | _ep->name); | |
1414 | } else { | |
1415 | ep = find_pxa_ep(udc_usb_ep->dev, udc_usb_ep); | |
1416 | } | |
1417 | ||
1418 | if (!ep || is_ep0(ep)) { | |
1419 | dev_err(udc_usb_ep->dev->dev, | |
1420 | "unable to match pxa_ep for ep %s\n", | |
1421 | _ep->name); | |
1422 | return -EINVAL; | |
1423 | } | |
1424 | ||
1425 | if ((desc->bDescriptorType != USB_DT_ENDPOINT) | |
1426 | || (ep->type != usb_endpoint_type(desc))) { | |
1427 | ep_err(ep, "type mismatch\n"); | |
1428 | return -EINVAL; | |
1429 | } | |
1430 | ||
29cc8897 | 1431 | if (ep->fifo_size < usb_endpoint_maxp(desc)) { |
d75379a5 RJ |
1432 | ep_err(ep, "bad maxpacket\n"); |
1433 | return -ERANGE; | |
1434 | } | |
1435 | ||
1436 | udc_usb_ep->pxa_ep = ep; | |
1437 | udc = ep->dev; | |
1438 | ||
1439 | if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) { | |
1440 | ep_err(ep, "bogus device state\n"); | |
1441 | return -ESHUTDOWN; | |
1442 | } | |
1443 | ||
1444 | ep->enabled = 1; | |
1445 | ||
1446 | /* flush fifo (mostly for OUT buffers) */ | |
1447 | pxa_ep_fifo_flush(_ep); | |
1448 | ||
1449 | ep_dbg(ep, "enabled\n"); | |
1450 | return 0; | |
1451 | } | |
1452 | ||
1453 | /** | |
1454 | * pxa_ep_disable - Disable usb endpoint | |
1455 | * @_ep: usb endpoint | |
1456 | * | |
1457 | * Same as for pxa_ep_enable, no physical endpoint configuration can be | |
1458 | * changed. | |
1459 | * Function flushes the endpoint and related requests. | |
1460 | */ | |
1461 | static int pxa_ep_disable(struct usb_ep *_ep) | |
1462 | { | |
1463 | struct pxa_ep *ep; | |
1464 | struct udc_usb_ep *udc_usb_ep; | |
d75379a5 RJ |
1465 | |
1466 | if (!_ep) | |
1467 | return -EINVAL; | |
1468 | ||
1469 | udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); | |
1470 | ep = udc_usb_ep->pxa_ep; | |
1471 | if (!ep || is_ep0(ep) || !list_empty(&ep->queue)) | |
1472 | return -EINVAL; | |
1473 | ||
d75379a5 RJ |
1474 | ep->enabled = 0; |
1475 | nuke(ep, -ESHUTDOWN); | |
d75379a5 RJ |
1476 | |
1477 | pxa_ep_fifo_flush(_ep); | |
1478 | udc_usb_ep->pxa_ep = NULL; | |
1479 | ||
1480 | ep_dbg(ep, "disabled\n"); | |
1481 | return 0; | |
1482 | } | |
1483 | ||
1484 | static struct usb_ep_ops pxa_ep_ops = { | |
1485 | .enable = pxa_ep_enable, | |
1486 | .disable = pxa_ep_disable, | |
1487 | ||
1488 | .alloc_request = pxa_ep_alloc_request, | |
1489 | .free_request = pxa_ep_free_request, | |
1490 | ||
1491 | .queue = pxa_ep_queue, | |
1492 | .dequeue = pxa_ep_dequeue, | |
1493 | ||
1494 | .set_halt = pxa_ep_set_halt, | |
1495 | .fifo_status = pxa_ep_fifo_status, | |
1496 | .fifo_flush = pxa_ep_fifo_flush, | |
1497 | }; | |
1498 | ||
eb507025 RJ |
1499 | /** |
1500 | * dplus_pullup - Connect or disconnect pullup resistor to D+ pin | |
1501 | * @udc: udc device | |
1502 | * @on: 0 if disconnect pullup resistor, 1 otherwise | |
1503 | * Context: any | |
1504 | * | |
1505 | * Handle D+ pullup resistor, make the device visible to the usb bus, and | |
1506 | * declare it as a full speed usb device | |
1507 | */ | |
1508 | static void dplus_pullup(struct pxa_udc *udc, int on) | |
1509 | { | |
1510 | if (on) { | |
1511 | if (gpio_is_valid(udc->mach->gpio_pullup)) | |
1512 | gpio_set_value(udc->mach->gpio_pullup, | |
1513 | !udc->mach->gpio_pullup_inverted); | |
1514 | if (udc->mach->udc_command) | |
1515 | udc->mach->udc_command(PXA2XX_UDC_CMD_CONNECT); | |
1516 | } else { | |
1517 | if (gpio_is_valid(udc->mach->gpio_pullup)) | |
1518 | gpio_set_value(udc->mach->gpio_pullup, | |
1519 | udc->mach->gpio_pullup_inverted); | |
1520 | if (udc->mach->udc_command) | |
1521 | udc->mach->udc_command(PXA2XX_UDC_CMD_DISCONNECT); | |
1522 | } | |
1523 | udc->pullup_on = on; | |
1524 | } | |
d75379a5 RJ |
1525 | |
1526 | /** | |
1527 | * pxa_udc_get_frame - Returns usb frame number | |
1528 | * @_gadget: usb gadget | |
1529 | */ | |
1530 | static int pxa_udc_get_frame(struct usb_gadget *_gadget) | |
1531 | { | |
1532 | struct pxa_udc *udc = to_gadget_udc(_gadget); | |
1533 | ||
1534 | return (udc_readl(udc, UDCFNR) & 0x7ff); | |
1535 | } | |
1536 | ||
1537 | /** | |
1538 | * pxa_udc_wakeup - Force udc device out of suspend | |
1539 | * @_gadget: usb gadget | |
1540 | * | |
25985edc | 1541 | * Returns 0 if successful, error code otherwise |
d75379a5 RJ |
1542 | */ |
1543 | static int pxa_udc_wakeup(struct usb_gadget *_gadget) | |
1544 | { | |
1545 | struct pxa_udc *udc = to_gadget_udc(_gadget); | |
1546 | ||
1547 | /* host may not have enabled remote wakeup */ | |
1548 | if ((udc_readl(udc, UDCCR) & UDCCR_DWRE) == 0) | |
1549 | return -EHOSTUNREACH; | |
1550 | udc_set_mask_UDCCR(udc, UDCCR_UDR); | |
1551 | return 0; | |
1552 | } | |
1553 | ||
eb507025 RJ |
1554 | static void udc_enable(struct pxa_udc *udc); |
1555 | static void udc_disable(struct pxa_udc *udc); | |
1556 | ||
1557 | /** | |
1558 | * should_enable_udc - Tells if UDC should be enabled | |
1559 | * @udc: udc device | |
1560 | * Context: any | |
1561 | * | |
1562 | * The UDC should be enabled if : | |
b799a7eb | 1563 | |
eb507025 RJ |
1564 | * - the pullup resistor is connected |
1565 | * - and a gadget driver is bound | |
b799a7eb | 1566 | * - and vbus is sensed (or no vbus sense is available) |
eb507025 RJ |
1567 | * |
1568 | * Returns 1 if UDC should be enabled, 0 otherwise | |
1569 | */ | |
1570 | static int should_enable_udc(struct pxa_udc *udc) | |
1571 | { | |
1572 | int put_on; | |
1573 | ||
1574 | put_on = ((udc->pullup_on) && (udc->driver)); | |
ded017ee | 1575 | put_on &= ((udc->vbus_sensed) || (IS_ERR_OR_NULL(udc->transceiver))); |
eb507025 RJ |
1576 | return put_on; |
1577 | } | |
1578 | ||
1579 | /** | |
1580 | * should_disable_udc - Tells if UDC should be disabled | |
1581 | * @udc: udc device | |
1582 | * Context: any | |
1583 | * | |
1584 | * The UDC should be disabled if : | |
1585 | * - the pullup resistor is not connected | |
1586 | * - or no gadget driver is bound | |
b799a7eb | 1587 | * - or no vbus is sensed (when vbus sesing is available) |
eb507025 RJ |
1588 | * |
1589 | * Returns 1 if UDC should be disabled | |
1590 | */ | |
1591 | static int should_disable_udc(struct pxa_udc *udc) | |
1592 | { | |
1593 | int put_off; | |
1594 | ||
1595 | put_off = ((!udc->pullup_on) || (!udc->driver)); | |
ded017ee | 1596 | put_off |= ((!udc->vbus_sensed) && (!IS_ERR_OR_NULL(udc->transceiver))); |
eb507025 RJ |
1597 | return put_off; |
1598 | } | |
1599 | ||
1600 | /** | |
1601 | * pxa_udc_pullup - Offer manual D+ pullup control | |
1602 | * @_gadget: usb gadget using the control | |
1603 | * @is_active: 0 if disconnect, else connect D+ pullup resistor | |
1604 | * Context: !in_interrupt() | |
1605 | * | |
1606 | * Returns 0 if OK, -EOPNOTSUPP if udc driver doesn't handle D+ pullup | |
1607 | */ | |
1608 | static int pxa_udc_pullup(struct usb_gadget *_gadget, int is_active) | |
1609 | { | |
1610 | struct pxa_udc *udc = to_gadget_udc(_gadget); | |
1611 | ||
1612 | if (!gpio_is_valid(udc->mach->gpio_pullup) && !udc->mach->udc_command) | |
1613 | return -EOPNOTSUPP; | |
1614 | ||
1615 | dplus_pullup(udc, is_active); | |
1616 | ||
1617 | if (should_enable_udc(udc)) | |
1618 | udc_enable(udc); | |
1619 | if (should_disable_udc(udc)) | |
1620 | udc_disable(udc); | |
1621 | return 0; | |
1622 | } | |
1623 | ||
b799a7eb RJ |
1624 | static void udc_enable(struct pxa_udc *udc); |
1625 | static void udc_disable(struct pxa_udc *udc); | |
1626 | ||
1627 | /** | |
1628 | * pxa_udc_vbus_session - Called by external transceiver to enable/disable udc | |
1629 | * @_gadget: usb gadget | |
1630 | * @is_active: 0 if should disable the udc, 1 if should enable | |
1631 | * | |
1632 | * Enables the udc, and optionnaly activates D+ pullup resistor. Or disables the | |
1633 | * udc, and deactivates D+ pullup resistor. | |
1634 | * | |
1635 | * Returns 0 | |
1636 | */ | |
1637 | static int pxa_udc_vbus_session(struct usb_gadget *_gadget, int is_active) | |
1638 | { | |
1639 | struct pxa_udc *udc = to_gadget_udc(_gadget); | |
1640 | ||
1641 | udc->vbus_sensed = is_active; | |
1642 | if (should_enable_udc(udc)) | |
1643 | udc_enable(udc); | |
1644 | if (should_disable_udc(udc)) | |
1645 | udc_disable(udc); | |
1646 | ||
1647 | return 0; | |
1648 | } | |
1649 | ||
ee069fb1 RJ |
1650 | /** |
1651 | * pxa_udc_vbus_draw - Called by gadget driver after SET_CONFIGURATION completed | |
1652 | * @_gadget: usb gadget | |
1653 | * @mA: current drawn | |
1654 | * | |
1655 | * Context: !in_interrupt() | |
1656 | * | |
1657 | * Called after a configuration was chosen by a USB host, to inform how much | |
1658 | * current can be drawn by the device from VBus line. | |
1659 | * | |
1660 | * Returns 0 or -EOPNOTSUPP if no transceiver is handling the udc | |
1661 | */ | |
1662 | static int pxa_udc_vbus_draw(struct usb_gadget *_gadget, unsigned mA) | |
1663 | { | |
1664 | struct pxa_udc *udc; | |
1665 | ||
1666 | udc = to_gadget_udc(_gadget); | |
ded017ee | 1667 | if (!IS_ERR_OR_NULL(udc->transceiver)) |
b96d3b08 | 1668 | return usb_phy_set_power(udc->transceiver, mA); |
ee069fb1 RJ |
1669 | return -EOPNOTSUPP; |
1670 | } | |
1671 | ||
70189a63 FB |
1672 | static int pxa27x_udc_start(struct usb_gadget *g, |
1673 | struct usb_gadget_driver *driver); | |
1674 | static int pxa27x_udc_stop(struct usb_gadget *g, | |
1675 | struct usb_gadget_driver *driver); | |
0f91349b | 1676 | |
d75379a5 RJ |
1677 | static const struct usb_gadget_ops pxa_udc_ops = { |
1678 | .get_frame = pxa_udc_get_frame, | |
1679 | .wakeup = pxa_udc_wakeup, | |
eb507025 | 1680 | .pullup = pxa_udc_pullup, |
b799a7eb | 1681 | .vbus_session = pxa_udc_vbus_session, |
ee069fb1 | 1682 | .vbus_draw = pxa_udc_vbus_draw, |
70189a63 FB |
1683 | .udc_start = pxa27x_udc_start, |
1684 | .udc_stop = pxa27x_udc_stop, | |
d75379a5 RJ |
1685 | }; |
1686 | ||
1687 | /** | |
1688 | * udc_disable - disable udc device controller | |
1689 | * @udc: udc device | |
eb507025 | 1690 | * Context: any |
d75379a5 RJ |
1691 | * |
1692 | * Disables the udc device : disables clocks, udc interrupts, control endpoint | |
1693 | * interrupts. | |
1694 | */ | |
1695 | static void udc_disable(struct pxa_udc *udc) | |
1696 | { | |
eb507025 RJ |
1697 | if (!udc->enabled) |
1698 | return; | |
1699 | ||
d75379a5 RJ |
1700 | udc_writel(udc, UDCICR0, 0); |
1701 | udc_writel(udc, UDCICR1, 0); | |
1702 | ||
1703 | udc_clear_mask_UDCCR(udc, UDCCR_UDE); | |
1704 | clk_disable(udc->clk); | |
1705 | ||
1706 | ep0_idle(udc); | |
1707 | udc->gadget.speed = USB_SPEED_UNKNOWN; | |
eb507025 RJ |
1708 | |
1709 | udc->enabled = 0; | |
d75379a5 RJ |
1710 | } |
1711 | ||
1712 | /** | |
1713 | * udc_init_data - Initialize udc device data structures | |
1714 | * @dev: udc device | |
1715 | * | |
1716 | * Initializes gadget endpoint list, endpoints locks. No action is taken | |
1717 | * on the hardware. | |
1718 | */ | |
50757b24 | 1719 | static void udc_init_data(struct pxa_udc *dev) |
d75379a5 RJ |
1720 | { |
1721 | int i; | |
1722 | struct pxa_ep *ep; | |
1723 | ||
1724 | /* device/ep0 records init */ | |
1725 | INIT_LIST_HEAD(&dev->gadget.ep_list); | |
1726 | INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); | |
1727 | dev->udc_usb_ep[0].pxa_ep = &dev->pxa_ep[0]; | |
1728 | ep0_idle(dev); | |
d75379a5 RJ |
1729 | |
1730 | /* PXA endpoints init */ | |
1731 | for (i = 0; i < NR_PXA_ENDPOINTS; i++) { | |
1732 | ep = &dev->pxa_ep[i]; | |
1733 | ||
1734 | ep->enabled = is_ep0(ep); | |
1735 | INIT_LIST_HEAD(&ep->queue); | |
1736 | spin_lock_init(&ep->lock); | |
1737 | } | |
1738 | ||
1739 | /* USB endpoints init */ | |
4c24b6d0 VS |
1740 | for (i = 1; i < NR_USB_ENDPOINTS; i++) |
1741 | list_add_tail(&dev->udc_usb_ep[i].usb_ep.ep_list, | |
1742 | &dev->gadget.ep_list); | |
d75379a5 RJ |
1743 | } |
1744 | ||
1745 | /** | |
1746 | * udc_enable - Enables the udc device | |
1747 | * @dev: udc device | |
1748 | * | |
1749 | * Enables the udc device : enables clocks, udc interrupts, control endpoint | |
1750 | * interrupts, sets usb as UDC client and setups endpoints. | |
1751 | */ | |
1752 | static void udc_enable(struct pxa_udc *udc) | |
1753 | { | |
eb507025 RJ |
1754 | if (udc->enabled) |
1755 | return; | |
1756 | ||
d75379a5 RJ |
1757 | udc_writel(udc, UDCICR0, 0); |
1758 | udc_writel(udc, UDCICR1, 0); | |
d75379a5 RJ |
1759 | udc_clear_mask_UDCCR(udc, UDCCR_UDE); |
1760 | ||
1761 | clk_enable(udc->clk); | |
1762 | ||
1763 | ep0_idle(udc); | |
1764 | udc->gadget.speed = USB_SPEED_FULL; | |
1765 | memset(&udc->stats, 0, sizeof(udc->stats)); | |
1766 | ||
1767 | udc_set_mask_UDCCR(udc, UDCCR_UDE); | |
367815ee | 1768 | ep_write_UDCCSR(&udc->pxa_ep[0], UDCCSR0_ACM); |
d75379a5 RJ |
1769 | udelay(2); |
1770 | if (udc_readl(udc, UDCCR) & UDCCR_EMCE) | |
1771 | dev_err(udc->dev, "Configuration errors, udc disabled\n"); | |
1772 | ||
1773 | /* | |
1774 | * Caller must be able to sleep in order to cope with startup transients | |
1775 | */ | |
1776 | msleep(100); | |
1777 | ||
1778 | /* enable suspend/resume and reset irqs */ | |
1779 | udc_writel(udc, UDCICR1, | |
1780 | UDCICR1_IECC | UDCICR1_IERU | |
1781 | | UDCICR1_IESU | UDCICR1_IERS); | |
1782 | ||
1783 | /* enable ep0 irqs */ | |
1784 | pio_irq_enable(&udc->pxa_ep[0]); | |
1785 | ||
eb507025 | 1786 | udc->enabled = 1; |
d75379a5 RJ |
1787 | } |
1788 | ||
1789 | /** | |
0f91349b | 1790 | * pxa27x_start - Register gadget driver |
d75379a5 | 1791 | * @driver: gadget driver |
b0fca50f | 1792 | * @bind: bind function |
d75379a5 RJ |
1793 | * |
1794 | * When a driver is successfully registered, it will receive control requests | |
1795 | * including set_configuration(), which enables non-control requests. Then | |
1796 | * usb traffic follows until a disconnect is reported. Then a host may connect | |
1797 | * again, or the driver might get unbound. | |
1798 | * | |
eb507025 RJ |
1799 | * Note that the udc is not automatically enabled. Check function |
1800 | * should_enable_udc(). | |
1801 | * | |
d75379a5 RJ |
1802 | * Returns 0 if no error, -EINVAL, -ENODEV, -EBUSY otherwise |
1803 | */ | |
70189a63 FB |
1804 | static int pxa27x_udc_start(struct usb_gadget *g, |
1805 | struct usb_gadget_driver *driver) | |
d75379a5 | 1806 | { |
70189a63 | 1807 | struct pxa_udc *udc = to_pxa(g); |
d75379a5 RJ |
1808 | int retval; |
1809 | ||
d75379a5 RJ |
1810 | /* first hook up the driver ... */ |
1811 | udc->driver = driver; | |
eb507025 | 1812 | dplus_pullup(udc, 1); |
d75379a5 | 1813 | |
ded017ee | 1814 | if (!IS_ERR_OR_NULL(udc->transceiver)) { |
6e13c650 HK |
1815 | retval = otg_set_peripheral(udc->transceiver->otg, |
1816 | &udc->gadget); | |
7fec3c25 RJ |
1817 | if (retval) { |
1818 | dev_err(udc->dev, "can't bind to transceiver\n"); | |
70189a63 | 1819 | goto fail; |
7fec3c25 RJ |
1820 | } |
1821 | } | |
1822 | ||
eb507025 RJ |
1823 | if (should_enable_udc(udc)) |
1824 | udc_enable(udc); | |
d75379a5 RJ |
1825 | return 0; |
1826 | ||
70189a63 | 1827 | fail: |
d75379a5 | 1828 | udc->driver = NULL; |
d75379a5 RJ |
1829 | return retval; |
1830 | } | |
d75379a5 RJ |
1831 | |
1832 | /** | |
1833 | * stop_activity - Stops udc endpoints | |
1834 | * @udc: udc device | |
1835 | * @driver: gadget driver | |
1836 | * | |
1837 | * Disables all udc endpoints (even control endpoint), report disconnect to | |
1838 | * the gadget user. | |
1839 | */ | |
1840 | static void stop_activity(struct pxa_udc *udc, struct usb_gadget_driver *driver) | |
1841 | { | |
1842 | int i; | |
1843 | ||
1844 | /* don't disconnect drivers more than once */ | |
1845 | if (udc->gadget.speed == USB_SPEED_UNKNOWN) | |
1846 | driver = NULL; | |
1847 | udc->gadget.speed = USB_SPEED_UNKNOWN; | |
1848 | ||
1849 | for (i = 0; i < NR_USB_ENDPOINTS; i++) | |
1850 | pxa_ep_disable(&udc->udc_usb_ep[i].usb_ep); | |
d75379a5 RJ |
1851 | } |
1852 | ||
1853 | /** | |
0f91349b | 1854 | * pxa27x_udc_stop - Unregister the gadget driver |
d75379a5 RJ |
1855 | * @driver: gadget driver |
1856 | * | |
1857 | * Returns 0 if no error, -ENODEV, -EINVAL otherwise | |
1858 | */ | |
70189a63 FB |
1859 | static int pxa27x_udc_stop(struct usb_gadget *g, |
1860 | struct usb_gadget_driver *driver) | |
d75379a5 | 1861 | { |
70189a63 | 1862 | struct pxa_udc *udc = to_pxa(g); |
d75379a5 RJ |
1863 | |
1864 | stop_activity(udc, driver); | |
1865 | udc_disable(udc); | |
eb507025 | 1866 | dplus_pullup(udc, 0); |
d75379a5 | 1867 | |
d75379a5 RJ |
1868 | udc->driver = NULL; |
1869 | ||
ded017ee | 1870 | if (!IS_ERR_OR_NULL(udc->transceiver)) |
6e13c650 | 1871 | return otg_set_peripheral(udc->transceiver->otg, NULL); |
d75379a5 RJ |
1872 | return 0; |
1873 | } | |
d75379a5 RJ |
1874 | |
1875 | /** | |
1876 | * handle_ep0_ctrl_req - handle control endpoint control request | |
1877 | * @udc: udc device | |
1878 | * @req: control request | |
1879 | */ | |
1880 | static void handle_ep0_ctrl_req(struct pxa_udc *udc, | |
1881 | struct pxa27x_request *req) | |
1882 | { | |
1883 | struct pxa_ep *ep = &udc->pxa_ep[0]; | |
1884 | union { | |
1885 | struct usb_ctrlrequest r; | |
1886 | u32 word[2]; | |
1887 | } u; | |
1888 | int i; | |
1889 | int have_extrabytes = 0; | |
5e23e90f | 1890 | unsigned long flags; |
d75379a5 RJ |
1891 | |
1892 | nuke(ep, -EPROTO); | |
5e23e90f | 1893 | spin_lock_irqsave(&ep->lock, flags); |
d75379a5 | 1894 | |
9f5351b7 RJ |
1895 | /* |
1896 | * In the PXA320 manual, in the section about Back-to-Back setup | |
1897 | * packets, it describes this situation. The solution is to set OPC to | |
1898 | * get rid of the status packet, and then continue with the setup | |
1899 | * packet. Generalize to pxa27x CPUs. | |
1900 | */ | |
1901 | if (epout_has_pkt(ep) && (ep_count_bytes_remain(ep) == 0)) | |
367815ee | 1902 | ep_write_UDCCSR(ep, UDCCSR0_OPC); |
9f5351b7 | 1903 | |
d75379a5 RJ |
1904 | /* read SETUP packet */ |
1905 | for (i = 0; i < 2; i++) { | |
1906 | if (unlikely(ep_is_empty(ep))) | |
1907 | goto stall; | |
1908 | u.word[i] = udc_ep_readl(ep, UDCDR); | |
1909 | } | |
1910 | ||
1911 | have_extrabytes = !ep_is_empty(ep); | |
1912 | while (!ep_is_empty(ep)) { | |
1913 | i = udc_ep_readl(ep, UDCDR); | |
1914 | ep_err(ep, "wrong to have extra bytes for setup : 0x%08x\n", i); | |
1915 | } | |
1916 | ||
d75379a5 RJ |
1917 | ep_dbg(ep, "SETUP %02x.%02x v%04x i%04x l%04x\n", |
1918 | u.r.bRequestType, u.r.bRequest, | |
5a59bc54 RJ |
1919 | le16_to_cpu(u.r.wValue), le16_to_cpu(u.r.wIndex), |
1920 | le16_to_cpu(u.r.wLength)); | |
d75379a5 RJ |
1921 | if (unlikely(have_extrabytes)) |
1922 | goto stall; | |
1923 | ||
1924 | if (u.r.bRequestType & USB_DIR_IN) | |
1925 | set_ep0state(udc, IN_DATA_STAGE); | |
1926 | else | |
1927 | set_ep0state(udc, OUT_DATA_STAGE); | |
1928 | ||
1929 | /* Tell UDC to enter Data Stage */ | |
367815ee | 1930 | ep_write_UDCCSR(ep, UDCCSR0_SA | UDCCSR0_OPC); |
d75379a5 | 1931 | |
5e23e90f | 1932 | spin_unlock_irqrestore(&ep->lock, flags); |
d75379a5 | 1933 | i = udc->driver->setup(&udc->gadget, &u.r); |
5e23e90f | 1934 | spin_lock_irqsave(&ep->lock, flags); |
d75379a5 RJ |
1935 | if (i < 0) |
1936 | goto stall; | |
1937 | out: | |
5e23e90f | 1938 | spin_unlock_irqrestore(&ep->lock, flags); |
d75379a5 RJ |
1939 | return; |
1940 | stall: | |
1941 | ep_dbg(ep, "protocol STALL, udccsr0=%03x err %d\n", | |
1942 | udc_ep_readl(ep, UDCCSR), i); | |
367815ee | 1943 | ep_write_UDCCSR(ep, UDCCSR0_FST | UDCCSR0_FTF); |
d75379a5 RJ |
1944 | set_ep0state(udc, STALL); |
1945 | goto out; | |
1946 | } | |
1947 | ||
1948 | /** | |
1949 | * handle_ep0 - Handle control endpoint data transfers | |
1950 | * @udc: udc device | |
1951 | * @fifo_irq: 1 if triggered by fifo service type irq | |
1952 | * @opc_irq: 1 if triggered by output packet complete type irq | |
1953 | * | |
1954 | * Context : when in_interrupt() or with ep->lock held | |
1955 | * | |
1956 | * Tries to transfer all pending request data into the endpoint and/or | |
1957 | * transfer all pending data in the endpoint into usb requests. | |
1958 | * Handles states of ep0 automata. | |
1959 | * | |
1960 | * PXA27x hardware handles several standard usb control requests without | |
1961 | * driver notification. The requests fully handled by hardware are : | |
1962 | * SET_ADDRESS, SET_FEATURE, CLEAR_FEATURE, GET_CONFIGURATION, GET_INTERFACE, | |
1963 | * GET_STATUS | |
1964 | * The requests handled by hardware, but with irq notification are : | |
1965 | * SYNCH_FRAME, SET_CONFIGURATION, SET_INTERFACE | |
1966 | * The remaining standard requests really handled by handle_ep0 are : | |
1967 | * GET_DESCRIPTOR, SET_DESCRIPTOR, specific requests. | |
1968 | * Requests standardized outside of USB 2.0 chapter 9 are handled more | |
1969 | * uniformly, by gadget drivers. | |
1970 | * | |
1971 | * The control endpoint state machine is _not_ USB spec compliant, it's even | |
1972 | * hardly compliant with Intel PXA270 developers guide. | |
1973 | * The key points which inferred this state machine are : | |
1974 | * - on every setup token, bit UDCCSR0_SA is raised and held until cleared by | |
1975 | * software. | |
1976 | * - on every OUT packet received, UDCCSR0_OPC is raised and held until | |
1977 | * cleared by software. | |
1978 | * - clearing UDCCSR0_OPC always flushes ep0. If in setup stage, never do it | |
1979 | * before reading ep0. | |
9f5351b7 RJ |
1980 | * This is true only for PXA27x. This is not true anymore for PXA3xx family |
1981 | * (check Back-to-Back setup packet in developers guide). | |
d75379a5 RJ |
1982 | * - irq can be called on a "packet complete" event (opc_irq=1), while |
1983 | * UDCCSR0_OPC is not yet raised (delta can be as big as 100ms | |
1984 | * from experimentation). | |
1985 | * - as UDCCSR0_SA can be activated while in irq handling, and clearing | |
1986 | * UDCCSR0_OPC would flush the setup data, we almost never clear UDCCSR0_OPC | |
1987 | * => we never actually read the "status stage" packet of an IN data stage | |
1988 | * => this is not documented in Intel documentation | |
1989 | * - hardware as no idea of STATUS STAGE, it only handle SETUP STAGE and DATA | |
1990 | * STAGE. The driver add STATUS STAGE to send last zero length packet in | |
1991 | * OUT_STATUS_STAGE. | |
1992 | * - special attention was needed for IN_STATUS_STAGE. If a packet complete | |
1993 | * event is detected, we terminate the status stage without ackowledging the | |
1994 | * packet (not to risk to loose a potential SETUP packet) | |
1995 | */ | |
1996 | static void handle_ep0(struct pxa_udc *udc, int fifo_irq, int opc_irq) | |
1997 | { | |
1998 | u32 udccsr0; | |
1999 | struct pxa_ep *ep = &udc->pxa_ep[0]; | |
2000 | struct pxa27x_request *req = NULL; | |
2001 | int completed = 0; | |
2002 | ||
4c24b6d0 VS |
2003 | if (!list_empty(&ep->queue)) |
2004 | req = list_entry(ep->queue.next, struct pxa27x_request, queue); | |
2005 | ||
d75379a5 RJ |
2006 | udccsr0 = udc_ep_readl(ep, UDCCSR); |
2007 | ep_dbg(ep, "state=%s, req=%p, udccsr0=0x%03x, udcbcr=%d, irq_msk=%x\n", | |
2008 | EP0_STNAME(udc), req, udccsr0, udc_ep_readl(ep, UDCBCR), | |
2009 | (fifo_irq << 1 | opc_irq)); | |
2010 | ||
d75379a5 RJ |
2011 | if (udccsr0 & UDCCSR0_SST) { |
2012 | ep_dbg(ep, "clearing stall status\n"); | |
2013 | nuke(ep, -EPIPE); | |
367815ee | 2014 | ep_write_UDCCSR(ep, UDCCSR0_SST); |
d75379a5 RJ |
2015 | ep0_idle(udc); |
2016 | } | |
2017 | ||
2018 | if (udccsr0 & UDCCSR0_SA) { | |
2019 | nuke(ep, 0); | |
2020 | set_ep0state(udc, SETUP_STAGE); | |
2021 | } | |
2022 | ||
2023 | switch (udc->ep0state) { | |
2024 | case WAIT_FOR_SETUP: | |
2025 | /* | |
2026 | * Hardware bug : beware, we cannot clear OPC, since we would | |
2027 | * miss a potential OPC irq for a setup packet. | |
2028 | * So, we only do ... nothing, and hope for a next irq with | |
2029 | * UDCCSR0_SA set. | |
2030 | */ | |
2031 | break; | |
2032 | case SETUP_STAGE: | |
2033 | udccsr0 &= UDCCSR0_CTRL_REQ_MASK; | |
2034 | if (likely(udccsr0 == UDCCSR0_CTRL_REQ_MASK)) | |
2035 | handle_ep0_ctrl_req(udc, req); | |
2036 | break; | |
2037 | case IN_DATA_STAGE: /* GET_DESCRIPTOR */ | |
2038 | if (epout_has_pkt(ep)) | |
367815ee | 2039 | ep_write_UDCCSR(ep, UDCCSR0_OPC); |
d75379a5 RJ |
2040 | if (req && !ep_is_full(ep)) |
2041 | completed = write_ep0_fifo(ep, req); | |
2042 | if (completed) | |
5e23e90f | 2043 | ep0_end_in_req(ep, req, NULL); |
d75379a5 RJ |
2044 | break; |
2045 | case OUT_DATA_STAGE: /* SET_DESCRIPTOR */ | |
2046 | if (epout_has_pkt(ep) && req) | |
2047 | completed = read_ep0_fifo(ep, req); | |
2048 | if (completed) | |
5e23e90f | 2049 | ep0_end_out_req(ep, req, NULL); |
d75379a5 RJ |
2050 | break; |
2051 | case STALL: | |
367815ee | 2052 | ep_write_UDCCSR(ep, UDCCSR0_FST); |
d75379a5 RJ |
2053 | break; |
2054 | case IN_STATUS_STAGE: | |
2055 | /* | |
2056 | * Hardware bug : beware, we cannot clear OPC, since we would | |
2057 | * miss a potential PC irq for a setup packet. | |
2058 | * So, we only put the ep0 into WAIT_FOR_SETUP state. | |
2059 | */ | |
2060 | if (opc_irq) | |
2061 | ep0_idle(udc); | |
2062 | break; | |
2063 | case OUT_STATUS_STAGE: | |
2064 | case WAIT_ACK_SET_CONF_INTERF: | |
2065 | ep_warn(ep, "should never get in %s state here!!!\n", | |
2066 | EP0_STNAME(ep->dev)); | |
2067 | ep0_idle(udc); | |
2068 | break; | |
2069 | } | |
2070 | } | |
2071 | ||
2072 | /** | |
2073 | * handle_ep - Handle endpoint data tranfers | |
2074 | * @ep: pxa physical endpoint | |
2075 | * | |
2076 | * Tries to transfer all pending request data into the endpoint and/or | |
2077 | * transfer all pending data in the endpoint into usb requests. | |
2078 | * | |
5e23e90f | 2079 | * Is always called when in_interrupt() and with ep->lock released. |
d75379a5 RJ |
2080 | */ |
2081 | static void handle_ep(struct pxa_ep *ep) | |
2082 | { | |
2083 | struct pxa27x_request *req; | |
2084 | int completed; | |
2085 | u32 udccsr; | |
2086 | int is_in = ep->dir_in; | |
2087 | int loop = 0; | |
5e23e90f RJ |
2088 | unsigned long flags; |
2089 | ||
2090 | spin_lock_irqsave(&ep->lock, flags); | |
2091 | if (ep->in_handle_ep) | |
2092 | goto recursion_detected; | |
2093 | ep->in_handle_ep = 1; | |
d75379a5 RJ |
2094 | |
2095 | do { | |
2096 | completed = 0; | |
2097 | udccsr = udc_ep_readl(ep, UDCCSR); | |
5e23e90f | 2098 | |
d75379a5 RJ |
2099 | if (likely(!list_empty(&ep->queue))) |
2100 | req = list_entry(ep->queue.next, | |
2101 | struct pxa27x_request, queue); | |
2102 | else | |
2103 | req = NULL; | |
2104 | ||
2105 | ep_dbg(ep, "req:%p, udccsr 0x%03x loop=%d\n", | |
2106 | req, udccsr, loop++); | |
2107 | ||
2108 | if (unlikely(udccsr & (UDCCSR_SST | UDCCSR_TRN))) | |
2109 | udc_ep_writel(ep, UDCCSR, | |
2110 | udccsr & (UDCCSR_SST | UDCCSR_TRN)); | |
2111 | if (!req) | |
2112 | break; | |
2113 | ||
2114 | if (unlikely(is_in)) { | |
2115 | if (likely(!ep_is_full(ep))) | |
2116 | completed = write_fifo(ep, req); | |
d75379a5 RJ |
2117 | } else { |
2118 | if (likely(epout_has_pkt(ep))) | |
2119 | completed = read_fifo(ep, req); | |
5e23e90f RJ |
2120 | } |
2121 | ||
2122 | if (completed) { | |
2123 | if (is_in) | |
2124 | ep_end_in_req(ep, req, &flags); | |
2125 | else | |
2126 | ep_end_out_req(ep, req, &flags); | |
d75379a5 RJ |
2127 | } |
2128 | } while (completed); | |
5e23e90f RJ |
2129 | |
2130 | ep->in_handle_ep = 0; | |
2131 | recursion_detected: | |
2132 | spin_unlock_irqrestore(&ep->lock, flags); | |
d75379a5 RJ |
2133 | } |
2134 | ||
2135 | /** | |
2136 | * pxa27x_change_configuration - Handle SET_CONF usb request notification | |
2137 | * @udc: udc device | |
2138 | * @config: usb configuration | |
2139 | * | |
2140 | * Post the request to upper level. | |
2141 | * Don't use any pxa specific harware configuration capabilities | |
2142 | */ | |
2143 | static void pxa27x_change_configuration(struct pxa_udc *udc, int config) | |
2144 | { | |
2145 | struct usb_ctrlrequest req ; | |
2146 | ||
2147 | dev_dbg(udc->dev, "config=%d\n", config); | |
2148 | ||
2149 | udc->config = config; | |
2150 | udc->last_interface = 0; | |
2151 | udc->last_alternate = 0; | |
2152 | ||
2153 | req.bRequestType = 0; | |
2154 | req.bRequest = USB_REQ_SET_CONFIGURATION; | |
2155 | req.wValue = config; | |
2156 | req.wIndex = 0; | |
2157 | req.wLength = 0; | |
2158 | ||
2159 | set_ep0state(udc, WAIT_ACK_SET_CONF_INTERF); | |
2160 | udc->driver->setup(&udc->gadget, &req); | |
367815ee | 2161 | ep_write_UDCCSR(&udc->pxa_ep[0], UDCCSR0_AREN); |
d75379a5 RJ |
2162 | } |
2163 | ||
2164 | /** | |
2165 | * pxa27x_change_interface - Handle SET_INTERF usb request notification | |
2166 | * @udc: udc device | |
2167 | * @iface: interface number | |
2168 | * @alt: alternate setting number | |
2169 | * | |
2170 | * Post the request to upper level. | |
2171 | * Don't use any pxa specific harware configuration capabilities | |
2172 | */ | |
2173 | static void pxa27x_change_interface(struct pxa_udc *udc, int iface, int alt) | |
2174 | { | |
2175 | struct usb_ctrlrequest req; | |
2176 | ||
2177 | dev_dbg(udc->dev, "interface=%d, alternate setting=%d\n", iface, alt); | |
2178 | ||
2179 | udc->last_interface = iface; | |
2180 | udc->last_alternate = alt; | |
2181 | ||
2182 | req.bRequestType = USB_RECIP_INTERFACE; | |
2183 | req.bRequest = USB_REQ_SET_INTERFACE; | |
2184 | req.wValue = alt; | |
2185 | req.wIndex = iface; | |
2186 | req.wLength = 0; | |
2187 | ||
2188 | set_ep0state(udc, WAIT_ACK_SET_CONF_INTERF); | |
2189 | udc->driver->setup(&udc->gadget, &req); | |
367815ee | 2190 | ep_write_UDCCSR(&udc->pxa_ep[0], UDCCSR0_AREN); |
d75379a5 RJ |
2191 | } |
2192 | ||
2193 | /* | |
2194 | * irq_handle_data - Handle data transfer | |
2195 | * @irq: irq IRQ number | |
2196 | * @udc: dev pxa_udc device structure | |
2197 | * | |
2198 | * Called from irq handler, transferts data to or from endpoint to queue | |
2199 | */ | |
2200 | static void irq_handle_data(int irq, struct pxa_udc *udc) | |
2201 | { | |
2202 | int i; | |
2203 | struct pxa_ep *ep; | |
2204 | u32 udcisr0 = udc_readl(udc, UDCISR0) & UDCCISR0_EP_MASK; | |
2205 | u32 udcisr1 = udc_readl(udc, UDCISR1) & UDCCISR1_EP_MASK; | |
2206 | ||
2207 | if (udcisr0 & UDCISR_INT_MASK) { | |
2208 | udc->pxa_ep[0].stats.irqs++; | |
2209 | udc_writel(udc, UDCISR0, UDCISR_INT(0, UDCISR_INT_MASK)); | |
2210 | handle_ep0(udc, !!(udcisr0 & UDCICR_FIFOERR), | |
2211 | !!(udcisr0 & UDCICR_PKTCOMPL)); | |
2212 | } | |
2213 | ||
2214 | udcisr0 >>= 2; | |
2215 | for (i = 1; udcisr0 != 0 && i < 16; udcisr0 >>= 2, i++) { | |
2216 | if (!(udcisr0 & UDCISR_INT_MASK)) | |
2217 | continue; | |
2218 | ||
2219 | udc_writel(udc, UDCISR0, UDCISR_INT(i, UDCISR_INT_MASK)); | |
4fdb31d9 ES |
2220 | |
2221 | WARN_ON(i >= ARRAY_SIZE(udc->pxa_ep)); | |
2222 | if (i < ARRAY_SIZE(udc->pxa_ep)) { | |
2223 | ep = &udc->pxa_ep[i]; | |
2224 | ep->stats.irqs++; | |
2225 | handle_ep(ep); | |
2226 | } | |
d75379a5 RJ |
2227 | } |
2228 | ||
2229 | for (i = 16; udcisr1 != 0 && i < 24; udcisr1 >>= 2, i++) { | |
2230 | udc_writel(udc, UDCISR1, UDCISR_INT(i - 16, UDCISR_INT_MASK)); | |
2231 | if (!(udcisr1 & UDCISR_INT_MASK)) | |
2232 | continue; | |
2233 | ||
4fdb31d9 ES |
2234 | WARN_ON(i >= ARRAY_SIZE(udc->pxa_ep)); |
2235 | if (i < ARRAY_SIZE(udc->pxa_ep)) { | |
2236 | ep = &udc->pxa_ep[i]; | |
2237 | ep->stats.irqs++; | |
2238 | handle_ep(ep); | |
2239 | } | |
d75379a5 RJ |
2240 | } |
2241 | ||
2242 | } | |
2243 | ||
2244 | /** | |
2245 | * irq_udc_suspend - Handle IRQ "UDC Suspend" | |
2246 | * @udc: udc device | |
2247 | */ | |
2248 | static void irq_udc_suspend(struct pxa_udc *udc) | |
2249 | { | |
2250 | udc_writel(udc, UDCISR1, UDCISR1_IRSU); | |
2251 | udc->stats.irqs_suspend++; | |
2252 | ||
2253 | if (udc->gadget.speed != USB_SPEED_UNKNOWN | |
2254 | && udc->driver && udc->driver->suspend) | |
2255 | udc->driver->suspend(&udc->gadget); | |
2256 | ep0_idle(udc); | |
2257 | } | |
2258 | ||
2259 | /** | |
2260 | * irq_udc_resume - Handle IRQ "UDC Resume" | |
2261 | * @udc: udc device | |
2262 | */ | |
2263 | static void irq_udc_resume(struct pxa_udc *udc) | |
2264 | { | |
2265 | udc_writel(udc, UDCISR1, UDCISR1_IRRU); | |
2266 | udc->stats.irqs_resume++; | |
2267 | ||
2268 | if (udc->gadget.speed != USB_SPEED_UNKNOWN | |
2269 | && udc->driver && udc->driver->resume) | |
2270 | udc->driver->resume(&udc->gadget); | |
2271 | } | |
2272 | ||
2273 | /** | |
2274 | * irq_udc_reconfig - Handle IRQ "UDC Change Configuration" | |
2275 | * @udc: udc device | |
2276 | */ | |
2277 | static void irq_udc_reconfig(struct pxa_udc *udc) | |
2278 | { | |
2279 | unsigned config, interface, alternate, config_change; | |
2280 | u32 udccr = udc_readl(udc, UDCCR); | |
2281 | ||
2282 | udc_writel(udc, UDCISR1, UDCISR1_IRCC); | |
2283 | udc->stats.irqs_reconfig++; | |
2284 | ||
2285 | config = (udccr & UDCCR_ACN) >> UDCCR_ACN_S; | |
2286 | config_change = (config != udc->config); | |
2287 | pxa27x_change_configuration(udc, config); | |
2288 | ||
2289 | interface = (udccr & UDCCR_AIN) >> UDCCR_AIN_S; | |
2290 | alternate = (udccr & UDCCR_AAISN) >> UDCCR_AAISN_S; | |
2291 | pxa27x_change_interface(udc, interface, alternate); | |
2292 | ||
2293 | if (config_change) | |
2294 | update_pxa_ep_matches(udc); | |
2295 | udc_set_mask_UDCCR(udc, UDCCR_SMAC); | |
2296 | } | |
2297 | ||
2298 | /** | |
2299 | * irq_udc_reset - Handle IRQ "UDC Reset" | |
2300 | * @udc: udc device | |
2301 | */ | |
2302 | static void irq_udc_reset(struct pxa_udc *udc) | |
2303 | { | |
2304 | u32 udccr = udc_readl(udc, UDCCR); | |
2305 | struct pxa_ep *ep = &udc->pxa_ep[0]; | |
2306 | ||
2307 | dev_info(udc->dev, "USB reset\n"); | |
2308 | udc_writel(udc, UDCISR1, UDCISR1_IRRS); | |
2309 | udc->stats.irqs_reset++; | |
2310 | ||
2311 | if ((udccr & UDCCR_UDA) == 0) { | |
2312 | dev_dbg(udc->dev, "USB reset start\n"); | |
2313 | stop_activity(udc, udc->driver); | |
2314 | } | |
2315 | udc->gadget.speed = USB_SPEED_FULL; | |
2316 | memset(&udc->stats, 0, sizeof udc->stats); | |
2317 | ||
2318 | nuke(ep, -EPROTO); | |
367815ee | 2319 | ep_write_UDCCSR(ep, UDCCSR0_FTF | UDCCSR0_OPC); |
d75379a5 RJ |
2320 | ep0_idle(udc); |
2321 | } | |
2322 | ||
2323 | /** | |
2324 | * pxa_udc_irq - Main irq handler | |
2325 | * @irq: irq number | |
2326 | * @_dev: udc device | |
2327 | * | |
2328 | * Handles all udc interrupts | |
2329 | */ | |
2330 | static irqreturn_t pxa_udc_irq(int irq, void *_dev) | |
2331 | { | |
2332 | struct pxa_udc *udc = _dev; | |
2333 | u32 udcisr0 = udc_readl(udc, UDCISR0); | |
2334 | u32 udcisr1 = udc_readl(udc, UDCISR1); | |
2335 | u32 udccr = udc_readl(udc, UDCCR); | |
2336 | u32 udcisr1_spec; | |
2337 | ||
2338 | dev_vdbg(udc->dev, "Interrupt, UDCISR0:0x%08x, UDCISR1:0x%08x, " | |
2339 | "UDCCR:0x%08x\n", udcisr0, udcisr1, udccr); | |
2340 | ||
2341 | udcisr1_spec = udcisr1 & 0xf8000000; | |
2342 | if (unlikely(udcisr1_spec & UDCISR1_IRSU)) | |
2343 | irq_udc_suspend(udc); | |
2344 | if (unlikely(udcisr1_spec & UDCISR1_IRRU)) | |
2345 | irq_udc_resume(udc); | |
2346 | if (unlikely(udcisr1_spec & UDCISR1_IRCC)) | |
2347 | irq_udc_reconfig(udc); | |
2348 | if (unlikely(udcisr1_spec & UDCISR1_IRRS)) | |
2349 | irq_udc_reset(udc); | |
2350 | ||
2351 | if ((udcisr0 & UDCCISR0_EP_MASK) | (udcisr1 & UDCCISR1_EP_MASK)) | |
2352 | irq_handle_data(irq, udc); | |
2353 | ||
2354 | return IRQ_HANDLED; | |
2355 | } | |
2356 | ||
2357 | static struct pxa_udc memory = { | |
2358 | .gadget = { | |
2359 | .ops = &pxa_udc_ops, | |
2360 | .ep0 = &memory.udc_usb_ep[0].usb_ep, | |
2361 | .name = driver_name, | |
2362 | .dev = { | |
c682b170 | 2363 | .init_name = "gadget", |
d75379a5 RJ |
2364 | }, |
2365 | }, | |
2366 | ||
2367 | .udc_usb_ep = { | |
2368 | USB_EP_CTRL, | |
2369 | USB_EP_OUT_BULK(1), | |
2370 | USB_EP_IN_BULK(2), | |
2371 | USB_EP_IN_ISO(3), | |
2372 | USB_EP_OUT_ISO(4), | |
2373 | USB_EP_IN_INT(5), | |
2374 | }, | |
2375 | ||
2376 | .pxa_ep = { | |
2377 | PXA_EP_CTRL, | |
2378 | /* Endpoints for gadget zero */ | |
2379 | PXA_EP_OUT_BULK(1, 1, 3, 0, 0), | |
2380 | PXA_EP_IN_BULK(2, 2, 3, 0, 0), | |
2381 | /* Endpoints for ether gadget, file storage gadget */ | |
2382 | PXA_EP_OUT_BULK(3, 1, 1, 0, 0), | |
2383 | PXA_EP_IN_BULK(4, 2, 1, 0, 0), | |
2384 | PXA_EP_IN_ISO(5, 3, 1, 0, 0), | |
2385 | PXA_EP_OUT_ISO(6, 4, 1, 0, 0), | |
2386 | PXA_EP_IN_INT(7, 5, 1, 0, 0), | |
2387 | /* Endpoints for RNDIS, serial */ | |
2388 | PXA_EP_OUT_BULK(8, 1, 2, 0, 0), | |
2389 | PXA_EP_IN_BULK(9, 2, 2, 0, 0), | |
2390 | PXA_EP_IN_INT(10, 5, 2, 0, 0), | |
2391 | /* | |
2392 | * All the following endpoints are only for completion. They | |
2393 | * won't never work, as multiple interfaces are really broken on | |
2394 | * the pxa. | |
2395 | */ | |
2396 | PXA_EP_OUT_BULK(11, 1, 2, 1, 0), | |
2397 | PXA_EP_IN_BULK(12, 2, 2, 1, 0), | |
2398 | /* Endpoint for CDC Ether */ | |
2399 | PXA_EP_OUT_BULK(13, 1, 1, 1, 1), | |
2400 | PXA_EP_IN_BULK(14, 2, 1, 1, 1), | |
2401 | } | |
2402 | }; | |
2403 | ||
2404 | /** | |
2405 | * pxa_udc_probe - probes the udc device | |
2406 | * @_dev: platform device | |
2407 | * | |
2408 | * Perform basic init : allocates udc clock, creates sysfs files, requests | |
2409 | * irq. | |
2410 | */ | |
ef222cb5 | 2411 | static int pxa_udc_probe(struct platform_device *pdev) |
d75379a5 RJ |
2412 | { |
2413 | struct resource *regs; | |
2414 | struct pxa_udc *udc = &memory; | |
eb507025 | 2415 | int retval = 0, gpio; |
d75379a5 RJ |
2416 | |
2417 | regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
2418 | if (!regs) | |
2419 | return -ENXIO; | |
2420 | udc->irq = platform_get_irq(pdev, 0); | |
2421 | if (udc->irq < 0) | |
2422 | return udc->irq; | |
2423 | ||
2424 | udc->dev = &pdev->dev; | |
2425 | udc->mach = pdev->dev.platform_data; | |
662dca54 | 2426 | udc->transceiver = usb_get_phy(USB_PHY_TYPE_USB2); |
d75379a5 | 2427 | |
eb507025 RJ |
2428 | gpio = udc->mach->gpio_pullup; |
2429 | if (gpio_is_valid(gpio)) { | |
2430 | retval = gpio_request(gpio, "USB D+ pullup"); | |
2431 | if (retval == 0) | |
2432 | gpio_direction_output(gpio, | |
2433 | udc->mach->gpio_pullup_inverted); | |
2434 | } | |
2435 | if (retval) { | |
2436 | dev_err(&pdev->dev, "Couldn't request gpio %d : %d\n", | |
2437 | gpio, retval); | |
2438 | return retval; | |
2439 | } | |
2440 | ||
e0d8b13a | 2441 | udc->clk = clk_get(&pdev->dev, NULL); |
d75379a5 RJ |
2442 | if (IS_ERR(udc->clk)) { |
2443 | retval = PTR_ERR(udc->clk); | |
2444 | goto err_clk; | |
2445 | } | |
2446 | ||
2447 | retval = -ENOMEM; | |
5c90e314 | 2448 | udc->regs = ioremap(regs->start, resource_size(regs)); |
d75379a5 RJ |
2449 | if (!udc->regs) { |
2450 | dev_err(&pdev->dev, "Unable to map UDC I/O memory\n"); | |
2451 | goto err_map; | |
2452 | } | |
2453 | ||
b799a7eb | 2454 | udc->vbus_sensed = 0; |
d75379a5 RJ |
2455 | |
2456 | the_controller = udc; | |
2457 | platform_set_drvdata(pdev, udc); | |
2458 | udc_init_data(udc); | |
2459 | pxa_eps_setup(udc); | |
2460 | ||
2461 | /* irq setup after old hardware state is cleaned up */ | |
2462 | retval = request_irq(udc->irq, pxa_udc_irq, | |
2463 | IRQF_SHARED, driver_name, udc); | |
2464 | if (retval != 0) { | |
2465 | dev_err(udc->dev, "%s: can't get irq %i, err %d\n", | |
ef614403 | 2466 | driver_name, udc->irq, retval); |
d75379a5 RJ |
2467 | goto err_irq; |
2468 | } | |
fe2a4297 | 2469 | |
0f91349b SAS |
2470 | retval = usb_add_gadget_udc(&pdev->dev, &udc->gadget); |
2471 | if (retval) | |
2472 | goto err_add_udc; | |
d75379a5 RJ |
2473 | |
2474 | pxa_init_debugfs(udc); | |
fe2a4297 | 2475 | |
d75379a5 | 2476 | return 0; |
fe2a4297 | 2477 | |
0f91349b SAS |
2478 | err_add_udc: |
2479 | free_irq(udc->irq, udc); | |
d75379a5 RJ |
2480 | err_irq: |
2481 | iounmap(udc->regs); | |
2482 | err_map: | |
2483 | clk_put(udc->clk); | |
2484 | udc->clk = NULL; | |
2485 | err_clk: | |
2486 | return retval; | |
2487 | } | |
2488 | ||
2489 | /** | |
2490 | * pxa_udc_remove - removes the udc device driver | |
2491 | * @_dev: platform device | |
2492 | */ | |
50757b24 | 2493 | static int pxa_udc_remove(struct platform_device *_dev) |
d75379a5 RJ |
2494 | { |
2495 | struct pxa_udc *udc = platform_get_drvdata(_dev); | |
eb507025 | 2496 | int gpio = udc->mach->gpio_pullup; |
d75379a5 | 2497 | |
0f91349b | 2498 | usb_del_gadget_udc(&udc->gadget); |
d75379a5 RJ |
2499 | usb_gadget_unregister_driver(udc->driver); |
2500 | free_irq(udc->irq, udc); | |
2501 | pxa_cleanup_debugfs(udc); | |
eb507025 RJ |
2502 | if (gpio_is_valid(gpio)) |
2503 | gpio_free(gpio); | |
d75379a5 | 2504 | |
721002ec | 2505 | usb_put_phy(udc->transceiver); |
7fec3c25 RJ |
2506 | |
2507 | udc->transceiver = NULL; | |
d75379a5 RJ |
2508 | the_controller = NULL; |
2509 | clk_put(udc->clk); | |
4c24b6d0 | 2510 | iounmap(udc->regs); |
d75379a5 RJ |
2511 | |
2512 | return 0; | |
2513 | } | |
2514 | ||
2515 | static void pxa_udc_shutdown(struct platform_device *_dev) | |
2516 | { | |
2517 | struct pxa_udc *udc = platform_get_drvdata(_dev); | |
2518 | ||
5a59bc54 RJ |
2519 | if (udc_readl(udc, UDCCR) & UDCCR_UDE) |
2520 | udc_disable(udc); | |
d75379a5 RJ |
2521 | } |
2522 | ||
59376cc3 | 2523 | #ifdef CONFIG_PXA27x |
f6d529f9 DB |
2524 | extern void pxa27x_clear_otgph(void); |
2525 | #else | |
2526 | #define pxa27x_clear_otgph() do {} while (0) | |
2527 | #endif | |
2528 | ||
d75379a5 RJ |
2529 | #ifdef CONFIG_PM |
2530 | /** | |
2531 | * pxa_udc_suspend - Suspend udc device | |
2532 | * @_dev: platform device | |
2533 | * @state: suspend state | |
2534 | * | |
2535 | * Suspends udc : saves configuration registers (UDCCR*), then disables the udc | |
2536 | * device. | |
2537 | */ | |
2538 | static int pxa_udc_suspend(struct platform_device *_dev, pm_message_t state) | |
2539 | { | |
2540 | int i; | |
2541 | struct pxa_udc *udc = platform_get_drvdata(_dev); | |
2542 | struct pxa_ep *ep; | |
2543 | ||
2544 | ep = &udc->pxa_ep[0]; | |
2545 | udc->udccsr0 = udc_ep_readl(ep, UDCCSR); | |
2546 | for (i = 1; i < NR_PXA_ENDPOINTS; i++) { | |
2547 | ep = &udc->pxa_ep[i]; | |
2548 | ep->udccsr_value = udc_ep_readl(ep, UDCCSR); | |
2549 | ep->udccr_value = udc_ep_readl(ep, UDCCR); | |
2550 | ep_dbg(ep, "udccsr:0x%03x, udccr:0x%x\n", | |
2551 | ep->udccsr_value, ep->udccr_value); | |
2552 | } | |
2553 | ||
2554 | udc_disable(udc); | |
eb507025 RJ |
2555 | udc->pullup_resume = udc->pullup_on; |
2556 | dplus_pullup(udc, 0); | |
d75379a5 RJ |
2557 | |
2558 | return 0; | |
2559 | } | |
2560 | ||
2561 | /** | |
2562 | * pxa_udc_resume - Resume udc device | |
2563 | * @_dev: platform device | |
2564 | * | |
2565 | * Resumes udc : restores configuration registers (UDCCR*), then enables the udc | |
2566 | * device. | |
2567 | */ | |
2568 | static int pxa_udc_resume(struct platform_device *_dev) | |
2569 | { | |
2570 | int i; | |
2571 | struct pxa_udc *udc = platform_get_drvdata(_dev); | |
2572 | struct pxa_ep *ep; | |
2573 | ||
2574 | ep = &udc->pxa_ep[0]; | |
2575 | udc_ep_writel(ep, UDCCSR, udc->udccsr0 & (UDCCSR0_FST | UDCCSR0_DME)); | |
2576 | for (i = 1; i < NR_PXA_ENDPOINTS; i++) { | |
2577 | ep = &udc->pxa_ep[i]; | |
2578 | udc_ep_writel(ep, UDCCSR, ep->udccsr_value); | |
2579 | udc_ep_writel(ep, UDCCR, ep->udccr_value); | |
2580 | ep_dbg(ep, "udccsr:0x%03x, udccr:0x%x\n", | |
2581 | ep->udccsr_value, ep->udccr_value); | |
2582 | } | |
2583 | ||
eb507025 RJ |
2584 | dplus_pullup(udc, udc->pullup_resume); |
2585 | if (should_enable_udc(udc)) | |
2586 | udc_enable(udc); | |
d75379a5 RJ |
2587 | /* |
2588 | * We do not handle OTG yet. | |
2589 | * | |
2590 | * OTGPH bit is set when sleep mode is entered. | |
2591 | * it indicates that OTG pad is retaining its state. | |
2592 | * Upon exit from sleep mode and before clearing OTGPH, | |
2593 | * Software must configure the USB OTG pad, UDC, and UHC | |
2594 | * to the state they were in before entering sleep mode. | |
d75379a5 | 2595 | */ |
f6d529f9 | 2596 | pxa27x_clear_otgph(); |
d75379a5 RJ |
2597 | |
2598 | return 0; | |
2599 | } | |
2600 | #endif | |
2601 | ||
2602 | /* work with hotplug and coldplug */ | |
7a857620 | 2603 | MODULE_ALIAS("platform:pxa27x-udc"); |
d75379a5 RJ |
2604 | |
2605 | static struct platform_driver udc_driver = { | |
2606 | .driver = { | |
7a857620 | 2607 | .name = "pxa27x-udc", |
d75379a5 RJ |
2608 | .owner = THIS_MODULE, |
2609 | }, | |
ef222cb5 | 2610 | .probe = pxa_udc_probe, |
50757b24 | 2611 | .remove = pxa_udc_remove, |
d75379a5 RJ |
2612 | .shutdown = pxa_udc_shutdown, |
2613 | #ifdef CONFIG_PM | |
2614 | .suspend = pxa_udc_suspend, | |
2615 | .resume = pxa_udc_resume | |
2616 | #endif | |
2617 | }; | |
2618 | ||
ef222cb5 | 2619 | module_platform_driver(udc_driver); |
d75379a5 RJ |
2620 | |
2621 | MODULE_DESCRIPTION(DRIVER_DESC); | |
2622 | MODULE_AUTHOR("Robert Jarzmik"); | |
2623 | MODULE_LICENSE("GPL"); |