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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> |
d75379a5 RJ |
27 | |
28 | #include <asm/byteorder.h> | |
a09e64fb | 29 | #include <mach/hardware.h> |
d75379a5 RJ |
30 | |
31 | #include <linux/usb.h> | |
32 | #include <linux/usb/ch9.h> | |
33 | #include <linux/usb/gadget.h> | |
a09e64fb | 34 | #include <mach/udc.h> |
d75379a5 RJ |
35 | |
36 | #include "pxa27x_udc.h" | |
37 | ||
38 | /* | |
39 | * This driver handles the USB Device Controller (UDC) in Intel's PXA 27x | |
40 | * series processors. | |
41 | * | |
42 | * Such controller drivers work with a gadget driver. The gadget driver | |
43 | * returns descriptors, implements configuration and data protocols used | |
44 | * by the host to interact with this device, and allocates endpoints to | |
45 | * the different protocol interfaces. The controller driver virtualizes | |
46 | * usb hardware so that the gadget drivers will be more portable. | |
47 | * | |
48 | * This UDC hardware wants to implement a bit too much USB protocol. The | |
49 | * biggest issues are: that the endpoints have to be set up before the | |
50 | * controller can be enabled (minor, and not uncommon); and each endpoint | |
51 | * can only have one configuration, interface and alternative interface | |
52 | * number (major, and very unusual). Once set up, these cannot be changed | |
53 | * without a controller reset. | |
54 | * | |
55 | * The workaround is to setup all combinations necessary for the gadgets which | |
56 | * will work with this driver. This is done in pxa_udc structure, statically. | |
57 | * See pxa_udc, udc_usb_ep versus pxa_ep, and matching function find_pxa_ep. | |
58 | * (You could modify this if needed. Some drivers have a "fifo_mode" module | |
59 | * parameter to facilitate such changes.) | |
60 | * | |
61 | * The combinations have been tested with these gadgets : | |
62 | * - zero gadget | |
63 | * - file storage gadget | |
64 | * - ether gadget | |
65 | * | |
66 | * The driver doesn't use DMA, only IO access and IRQ callbacks. No use is | |
67 | * made of UDC's double buffering either. USB "On-The-Go" is not implemented. | |
68 | * | |
69 | * All the requests are handled the same way : | |
70 | * - the drivers tries to handle the request directly to the IO | |
71 | * - if the IO fifo is not big enough, the remaining is send/received in | |
72 | * interrupt handling. | |
73 | */ | |
74 | ||
75 | #define DRIVER_VERSION "2008-04-18" | |
76 | #define DRIVER_DESC "PXA 27x USB Device Controller driver" | |
77 | ||
78 | static const char driver_name[] = "pxa27x_udc"; | |
79 | static struct pxa_udc *the_controller; | |
80 | ||
81 | static void handle_ep(struct pxa_ep *ep); | |
82 | ||
83 | /* | |
84 | * Debug filesystem | |
85 | */ | |
86 | #ifdef CONFIG_USB_GADGET_DEBUG_FS | |
87 | ||
88 | #include <linux/debugfs.h> | |
89 | #include <linux/uaccess.h> | |
90 | #include <linux/seq_file.h> | |
91 | ||
92 | static int state_dbg_show(struct seq_file *s, void *p) | |
93 | { | |
94 | struct pxa_udc *udc = s->private; | |
95 | int pos = 0, ret; | |
96 | u32 tmp; | |
97 | ||
98 | ret = -ENODEV; | |
99 | if (!udc->driver) | |
100 | goto out; | |
101 | ||
102 | /* basic device status */ | |
103 | pos += seq_printf(s, DRIVER_DESC "\n" | |
104 | "%s version: %s\nGadget driver: %s\n", | |
105 | driver_name, DRIVER_VERSION, | |
106 | udc->driver ? udc->driver->driver.name : "(none)"); | |
107 | ||
108 | tmp = udc_readl(udc, UDCCR); | |
109 | pos += seq_printf(s, | |
110 | "udccr=0x%0x(%s%s%s%s%s%s%s%s%s%s), " | |
111 | "con=%d,inter=%d,altinter=%d\n", tmp, | |
112 | (tmp & UDCCR_OEN) ? " oen":"", | |
113 | (tmp & UDCCR_AALTHNP) ? " aalthnp":"", | |
114 | (tmp & UDCCR_AHNP) ? " rem" : "", | |
115 | (tmp & UDCCR_BHNP) ? " rstir" : "", | |
116 | (tmp & UDCCR_DWRE) ? " dwre" : "", | |
117 | (tmp & UDCCR_SMAC) ? " smac" : "", | |
118 | (tmp & UDCCR_EMCE) ? " emce" : "", | |
119 | (tmp & UDCCR_UDR) ? " udr" : "", | |
120 | (tmp & UDCCR_UDA) ? " uda" : "", | |
121 | (tmp & UDCCR_UDE) ? " ude" : "", | |
122 | (tmp & UDCCR_ACN) >> UDCCR_ACN_S, | |
123 | (tmp & UDCCR_AIN) >> UDCCR_AIN_S, | |
124 | (tmp & UDCCR_AAISN) >> UDCCR_AAISN_S); | |
125 | /* registers for device and ep0 */ | |
126 | pos += seq_printf(s, "udcicr0=0x%08x udcicr1=0x%08x\n", | |
127 | udc_readl(udc, UDCICR0), udc_readl(udc, UDCICR1)); | |
128 | pos += seq_printf(s, "udcisr0=0x%08x udcisr1=0x%08x\n", | |
129 | udc_readl(udc, UDCISR0), udc_readl(udc, UDCISR1)); | |
130 | pos += seq_printf(s, "udcfnr=%d\n", udc_readl(udc, UDCFNR)); | |
131 | pos += seq_printf(s, "irqs: reset=%lu, suspend=%lu, resume=%lu, " | |
132 | "reconfig=%lu\n", | |
133 | udc->stats.irqs_reset, udc->stats.irqs_suspend, | |
134 | udc->stats.irqs_resume, udc->stats.irqs_reconfig); | |
135 | ||
136 | ret = 0; | |
137 | out: | |
138 | return ret; | |
139 | } | |
140 | ||
141 | static int queues_dbg_show(struct seq_file *s, void *p) | |
142 | { | |
143 | struct pxa_udc *udc = s->private; | |
144 | struct pxa_ep *ep; | |
145 | struct pxa27x_request *req; | |
146 | int pos = 0, i, maxpkt, ret; | |
147 | ||
148 | ret = -ENODEV; | |
149 | if (!udc->driver) | |
150 | goto out; | |
151 | ||
152 | /* dump endpoint queues */ | |
153 | for (i = 0; i < NR_PXA_ENDPOINTS; i++) { | |
154 | ep = &udc->pxa_ep[i]; | |
155 | maxpkt = ep->fifo_size; | |
156 | pos += seq_printf(s, "%-12s max_pkt=%d %s\n", | |
157 | EPNAME(ep), maxpkt, "pio"); | |
158 | ||
159 | if (list_empty(&ep->queue)) { | |
160 | pos += seq_printf(s, "\t(nothing queued)\n"); | |
161 | continue; | |
162 | } | |
163 | ||
164 | list_for_each_entry(req, &ep->queue, queue) { | |
165 | pos += seq_printf(s, "\treq %p len %d/%d buf %p\n", | |
166 | &req->req, req->req.actual, | |
167 | req->req.length, req->req.buf); | |
168 | } | |
169 | } | |
170 | ||
171 | ret = 0; | |
172 | out: | |
173 | return ret; | |
174 | } | |
175 | ||
176 | static int eps_dbg_show(struct seq_file *s, void *p) | |
177 | { | |
178 | struct pxa_udc *udc = s->private; | |
179 | struct pxa_ep *ep; | |
180 | int pos = 0, i, ret; | |
181 | u32 tmp; | |
182 | ||
183 | ret = -ENODEV; | |
184 | if (!udc->driver) | |
185 | goto out; | |
186 | ||
187 | ep = &udc->pxa_ep[0]; | |
188 | tmp = udc_ep_readl(ep, UDCCSR); | |
189 | pos += seq_printf(s, "udccsr0=0x%03x(%s%s%s%s%s%s%s)\n", tmp, | |
190 | (tmp & UDCCSR0_SA) ? " sa" : "", | |
191 | (tmp & UDCCSR0_RNE) ? " rne" : "", | |
192 | (tmp & UDCCSR0_FST) ? " fst" : "", | |
193 | (tmp & UDCCSR0_SST) ? " sst" : "", | |
194 | (tmp & UDCCSR0_DME) ? " dme" : "", | |
195 | (tmp & UDCCSR0_IPR) ? " ipr" : "", | |
196 | (tmp & UDCCSR0_OPC) ? " opc" : ""); | |
197 | for (i = 0; i < NR_PXA_ENDPOINTS; i++) { | |
198 | ep = &udc->pxa_ep[i]; | |
199 | tmp = i? udc_ep_readl(ep, UDCCR) : udc_readl(udc, UDCCR); | |
200 | pos += seq_printf(s, "%-12s: " | |
201 | "IN %lu(%lu reqs), OUT %lu(%lu reqs), " | |
202 | "irqs=%lu, udccr=0x%08x, udccsr=0x%03x, " | |
203 | "udcbcr=%d\n", | |
204 | EPNAME(ep), | |
205 | ep->stats.in_bytes, ep->stats.in_ops, | |
206 | ep->stats.out_bytes, ep->stats.out_ops, | |
207 | ep->stats.irqs, | |
208 | tmp, udc_ep_readl(ep, UDCCSR), | |
209 | udc_ep_readl(ep, UDCBCR)); | |
210 | } | |
211 | ||
212 | ret = 0; | |
213 | out: | |
214 | return ret; | |
215 | } | |
216 | ||
217 | static int eps_dbg_open(struct inode *inode, struct file *file) | |
218 | { | |
219 | return single_open(file, eps_dbg_show, inode->i_private); | |
220 | } | |
221 | ||
222 | static int queues_dbg_open(struct inode *inode, struct file *file) | |
223 | { | |
224 | return single_open(file, queues_dbg_show, inode->i_private); | |
225 | } | |
226 | ||
227 | static int state_dbg_open(struct inode *inode, struct file *file) | |
228 | { | |
229 | return single_open(file, state_dbg_show, inode->i_private); | |
230 | } | |
231 | ||
232 | static const struct file_operations state_dbg_fops = { | |
233 | .owner = THIS_MODULE, | |
234 | .open = state_dbg_open, | |
235 | .llseek = seq_lseek, | |
236 | .read = seq_read, | |
237 | .release = single_release, | |
238 | }; | |
239 | ||
240 | static const struct file_operations queues_dbg_fops = { | |
241 | .owner = THIS_MODULE, | |
242 | .open = queues_dbg_open, | |
243 | .llseek = seq_lseek, | |
244 | .read = seq_read, | |
245 | .release = single_release, | |
246 | }; | |
247 | ||
248 | static const struct file_operations eps_dbg_fops = { | |
249 | .owner = THIS_MODULE, | |
250 | .open = eps_dbg_open, | |
251 | .llseek = seq_lseek, | |
252 | .read = seq_read, | |
253 | .release = single_release, | |
254 | }; | |
255 | ||
256 | static void pxa_init_debugfs(struct pxa_udc *udc) | |
257 | { | |
258 | struct dentry *root, *state, *queues, *eps; | |
259 | ||
260 | root = debugfs_create_dir(udc->gadget.name, NULL); | |
261 | if (IS_ERR(root) || !root) | |
262 | goto err_root; | |
263 | ||
264 | state = debugfs_create_file("udcstate", 0400, root, udc, | |
265 | &state_dbg_fops); | |
266 | if (!state) | |
267 | goto err_state; | |
268 | queues = debugfs_create_file("queues", 0400, root, udc, | |
269 | &queues_dbg_fops); | |
270 | if (!queues) | |
271 | goto err_queues; | |
272 | eps = debugfs_create_file("epstate", 0400, root, udc, | |
273 | &eps_dbg_fops); | |
00185a60 | 274 | if (!eps) |
d75379a5 RJ |
275 | goto err_eps; |
276 | ||
277 | udc->debugfs_root = root; | |
278 | udc->debugfs_state = state; | |
279 | udc->debugfs_queues = queues; | |
280 | udc->debugfs_eps = eps; | |
281 | return; | |
282 | err_eps: | |
283 | debugfs_remove(eps); | |
284 | err_queues: | |
285 | debugfs_remove(queues); | |
286 | err_state: | |
287 | debugfs_remove(root); | |
288 | err_root: | |
289 | dev_err(udc->dev, "debugfs is not available\n"); | |
290 | } | |
291 | ||
292 | static void pxa_cleanup_debugfs(struct pxa_udc *udc) | |
293 | { | |
294 | debugfs_remove(udc->debugfs_eps); | |
295 | debugfs_remove(udc->debugfs_queues); | |
296 | debugfs_remove(udc->debugfs_state); | |
297 | debugfs_remove(udc->debugfs_root); | |
298 | udc->debugfs_eps = NULL; | |
299 | udc->debugfs_queues = NULL; | |
300 | udc->debugfs_state = NULL; | |
301 | udc->debugfs_root = NULL; | |
302 | } | |
303 | ||
304 | #else | |
305 | static inline void pxa_init_debugfs(struct pxa_udc *udc) | |
306 | { | |
307 | } | |
308 | ||
309 | static inline void pxa_cleanup_debugfs(struct pxa_udc *udc) | |
310 | { | |
311 | } | |
312 | #endif | |
313 | ||
314 | /** | |
315 | * is_match_usb_pxa - check if usb_ep and pxa_ep match | |
316 | * @udc_usb_ep: usb endpoint | |
317 | * @ep: pxa endpoint | |
318 | * @config: configuration required in pxa_ep | |
319 | * @interface: interface required in pxa_ep | |
320 | * @altsetting: altsetting required in pxa_ep | |
321 | * | |
322 | * Returns 1 if all criteria match between pxa and usb endpoint, 0 otherwise | |
323 | */ | |
324 | static int is_match_usb_pxa(struct udc_usb_ep *udc_usb_ep, struct pxa_ep *ep, | |
325 | int config, int interface, int altsetting) | |
326 | { | |
327 | if (usb_endpoint_num(&udc_usb_ep->desc) != ep->addr) | |
328 | return 0; | |
329 | if (usb_endpoint_dir_in(&udc_usb_ep->desc) != ep->dir_in) | |
330 | return 0; | |
331 | if (usb_endpoint_type(&udc_usb_ep->desc) != ep->type) | |
332 | return 0; | |
333 | if ((ep->config != config) || (ep->interface != interface) | |
334 | || (ep->alternate != altsetting)) | |
335 | return 0; | |
336 | return 1; | |
337 | } | |
338 | ||
339 | /** | |
340 | * find_pxa_ep - find pxa_ep structure matching udc_usb_ep | |
341 | * @udc: pxa udc | |
342 | * @udc_usb_ep: udc_usb_ep structure | |
343 | * | |
344 | * Match udc_usb_ep and all pxa_ep available, to see if one matches. | |
345 | * This is necessary because of the strong pxa hardware restriction requiring | |
346 | * that once pxa endpoints are initialized, their configuration is freezed, and | |
347 | * no change can be made to their address, direction, or in which configuration, | |
348 | * interface or altsetting they are active ... which differs from more usual | |
349 | * models which have endpoints be roughly just addressable fifos, and leave | |
350 | * configuration events up to gadget drivers (like all control messages). | |
351 | * | |
352 | * Note that there is still a blurred point here : | |
353 | * - we rely on UDCCR register "active interface" and "active altsetting". | |
354 | * This is a nonsense in regard of USB spec, where multiple interfaces are | |
355 | * active at the same time. | |
356 | * - if we knew for sure that the pxa can handle multiple interface at the | |
357 | * same time, assuming Intel's Developer Guide is wrong, this function | |
358 | * should be reviewed, and a cache of couples (iface, altsetting) should | |
359 | * be kept in the pxa_udc structure. In this case this function would match | |
360 | * against the cache of couples instead of the "last altsetting" set up. | |
361 | * | |
362 | * Returns the matched pxa_ep structure or NULL if none found | |
363 | */ | |
364 | static struct pxa_ep *find_pxa_ep(struct pxa_udc *udc, | |
365 | struct udc_usb_ep *udc_usb_ep) | |
366 | { | |
367 | int i; | |
368 | struct pxa_ep *ep; | |
369 | int cfg = udc->config; | |
370 | int iface = udc->last_interface; | |
371 | int alt = udc->last_alternate; | |
372 | ||
373 | if (udc_usb_ep == &udc->udc_usb_ep[0]) | |
374 | return &udc->pxa_ep[0]; | |
375 | ||
376 | for (i = 1; i < NR_PXA_ENDPOINTS; i++) { | |
377 | ep = &udc->pxa_ep[i]; | |
378 | if (is_match_usb_pxa(udc_usb_ep, ep, cfg, iface, alt)) | |
379 | return ep; | |
380 | } | |
381 | return NULL; | |
382 | } | |
383 | ||
384 | /** | |
385 | * update_pxa_ep_matches - update pxa_ep cached values in all udc_usb_ep | |
386 | * @udc: pxa udc | |
387 | * | |
388 | * Context: in_interrupt() | |
389 | * | |
390 | * Updates all pxa_ep fields in udc_usb_ep structures, if this field was | |
391 | * previously set up (and is not NULL). The update is necessary is a | |
392 | * configuration change or altsetting change was issued by the USB host. | |
393 | */ | |
394 | static void update_pxa_ep_matches(struct pxa_udc *udc) | |
395 | { | |
396 | int i; | |
397 | struct udc_usb_ep *udc_usb_ep; | |
398 | ||
399 | for (i = 1; i < NR_USB_ENDPOINTS; i++) { | |
400 | udc_usb_ep = &udc->udc_usb_ep[i]; | |
401 | if (udc_usb_ep->pxa_ep) | |
402 | udc_usb_ep->pxa_ep = find_pxa_ep(udc, udc_usb_ep); | |
403 | } | |
404 | } | |
405 | ||
406 | /** | |
407 | * pio_irq_enable - Enables irq generation for one endpoint | |
408 | * @ep: udc endpoint | |
409 | */ | |
410 | static void pio_irq_enable(struct pxa_ep *ep) | |
411 | { | |
412 | struct pxa_udc *udc = ep->dev; | |
413 | int index = EPIDX(ep); | |
414 | u32 udcicr0 = udc_readl(udc, UDCICR0); | |
415 | u32 udcicr1 = udc_readl(udc, UDCICR1); | |
416 | ||
417 | if (index < 16) | |
418 | udc_writel(udc, UDCICR0, udcicr0 | (3 << (index * 2))); | |
419 | else | |
420 | udc_writel(udc, UDCICR1, udcicr1 | (3 << ((index - 16) * 2))); | |
421 | } | |
422 | ||
423 | /** | |
424 | * pio_irq_disable - Disables irq generation for one endpoint | |
425 | * @ep: udc endpoint | |
d75379a5 RJ |
426 | */ |
427 | static void pio_irq_disable(struct pxa_ep *ep) | |
428 | { | |
429 | struct pxa_udc *udc = ep->dev; | |
430 | int index = EPIDX(ep); | |
431 | u32 udcicr0 = udc_readl(udc, UDCICR0); | |
432 | u32 udcicr1 = udc_readl(udc, UDCICR1); | |
433 | ||
434 | if (index < 16) | |
435 | udc_writel(udc, UDCICR0, udcicr0 & ~(3 << (index * 2))); | |
436 | else | |
437 | udc_writel(udc, UDCICR1, udcicr1 & ~(3 << ((index - 16) * 2))); | |
438 | } | |
439 | ||
440 | /** | |
441 | * udc_set_mask_UDCCR - set bits in UDCCR | |
442 | * @udc: udc device | |
443 | * @mask: bits to set in UDCCR | |
444 | * | |
445 | * Sets bits in UDCCR, leaving DME and FST bits as they were. | |
446 | */ | |
447 | static inline void udc_set_mask_UDCCR(struct pxa_udc *udc, int mask) | |
448 | { | |
449 | u32 udccr = udc_readl(udc, UDCCR); | |
450 | udc_writel(udc, UDCCR, | |
451 | (udccr & UDCCR_MASK_BITS) | (mask & UDCCR_MASK_BITS)); | |
452 | } | |
453 | ||
454 | /** | |
455 | * udc_clear_mask_UDCCR - clears bits in UDCCR | |
456 | * @udc: udc device | |
457 | * @mask: bit to clear in UDCCR | |
458 | * | |
459 | * Clears bits in UDCCR, leaving DME and FST bits as they were. | |
460 | */ | |
461 | static inline void udc_clear_mask_UDCCR(struct pxa_udc *udc, int mask) | |
462 | { | |
463 | u32 udccr = udc_readl(udc, UDCCR); | |
464 | udc_writel(udc, UDCCR, | |
465 | (udccr & UDCCR_MASK_BITS) & ~(mask & UDCCR_MASK_BITS)); | |
466 | } | |
467 | ||
367815ee RJ |
468 | /** |
469 | * ep_write_UDCCSR - set bits in UDCCSR | |
470 | * @udc: udc device | |
471 | * @mask: bits to set in UDCCR | |
472 | * | |
473 | * Sets bits in UDCCSR (UDCCSR0 and UDCCSR*). | |
474 | * | |
475 | * A specific case is applied to ep0 : the ACM bit is always set to 1, for | |
476 | * SET_INTERFACE and SET_CONFIGURATION. | |
477 | */ | |
478 | static inline void ep_write_UDCCSR(struct pxa_ep *ep, int mask) | |
479 | { | |
480 | if (is_ep0(ep)) | |
481 | mask |= UDCCSR0_ACM; | |
482 | udc_ep_writel(ep, UDCCSR, mask); | |
483 | } | |
484 | ||
d75379a5 RJ |
485 | /** |
486 | * ep_count_bytes_remain - get how many bytes in udc endpoint | |
487 | * @ep: udc endpoint | |
488 | * | |
489 | * Returns number of bytes in OUT fifos. Broken for IN fifos (-EOPNOTSUPP) | |
490 | */ | |
491 | static int ep_count_bytes_remain(struct pxa_ep *ep) | |
492 | { | |
493 | if (ep->dir_in) | |
494 | return -EOPNOTSUPP; | |
495 | return udc_ep_readl(ep, UDCBCR) & 0x3ff; | |
496 | } | |
497 | ||
498 | /** | |
499 | * ep_is_empty - checks if ep has byte ready for reading | |
500 | * @ep: udc endpoint | |
501 | * | |
502 | * If endpoint is the control endpoint, checks if there are bytes in the | |
503 | * control endpoint fifo. If endpoint is a data endpoint, checks if bytes | |
504 | * are ready for reading on OUT endpoint. | |
505 | * | |
506 | * Returns 0 if ep not empty, 1 if ep empty, -EOPNOTSUPP if IN endpoint | |
507 | */ | |
508 | static int ep_is_empty(struct pxa_ep *ep) | |
509 | { | |
510 | int ret; | |
511 | ||
512 | if (!is_ep0(ep) && ep->dir_in) | |
513 | return -EOPNOTSUPP; | |
514 | if (is_ep0(ep)) | |
515 | ret = !(udc_ep_readl(ep, UDCCSR) & UDCCSR0_RNE); | |
516 | else | |
517 | ret = !(udc_ep_readl(ep, UDCCSR) & UDCCSR_BNE); | |
518 | return ret; | |
519 | } | |
520 | ||
521 | /** | |
522 | * ep_is_full - checks if ep has place to write bytes | |
523 | * @ep: udc endpoint | |
524 | * | |
525 | * If endpoint is not the control endpoint and is an IN endpoint, checks if | |
526 | * there is place to write bytes into the endpoint. | |
527 | * | |
528 | * Returns 0 if ep not full, 1 if ep full, -EOPNOTSUPP if OUT endpoint | |
529 | */ | |
530 | static int ep_is_full(struct pxa_ep *ep) | |
531 | { | |
532 | if (is_ep0(ep)) | |
533 | return (udc_ep_readl(ep, UDCCSR) & UDCCSR0_IPR); | |
534 | if (!ep->dir_in) | |
535 | return -EOPNOTSUPP; | |
536 | return (!(udc_ep_readl(ep, UDCCSR) & UDCCSR_BNF)); | |
537 | } | |
538 | ||
539 | /** | |
540 | * epout_has_pkt - checks if OUT endpoint fifo has a packet available | |
541 | * @ep: pxa endpoint | |
542 | * | |
543 | * Returns 1 if a complete packet is available, 0 if not, -EOPNOTSUPP for IN ep. | |
544 | */ | |
545 | static int epout_has_pkt(struct pxa_ep *ep) | |
546 | { | |
547 | if (!is_ep0(ep) && ep->dir_in) | |
548 | return -EOPNOTSUPP; | |
549 | if (is_ep0(ep)) | |
550 | return (udc_ep_readl(ep, UDCCSR) & UDCCSR0_OPC); | |
551 | return (udc_ep_readl(ep, UDCCSR) & UDCCSR_PC); | |
552 | } | |
553 | ||
554 | /** | |
555 | * set_ep0state - Set ep0 automata state | |
556 | * @dev: udc device | |
557 | * @state: state | |
558 | */ | |
559 | static void set_ep0state(struct pxa_udc *udc, int state) | |
560 | { | |
561 | struct pxa_ep *ep = &udc->pxa_ep[0]; | |
562 | char *old_stname = EP0_STNAME(udc); | |
563 | ||
564 | udc->ep0state = state; | |
565 | ep_dbg(ep, "state=%s->%s, udccsr0=0x%03x, udcbcr=%d\n", old_stname, | |
566 | EP0_STNAME(udc), udc_ep_readl(ep, UDCCSR), | |
567 | udc_ep_readl(ep, UDCBCR)); | |
568 | } | |
569 | ||
570 | /** | |
571 | * ep0_idle - Put control endpoint into idle state | |
572 | * @dev: udc device | |
573 | */ | |
574 | static void ep0_idle(struct pxa_udc *dev) | |
575 | { | |
576 | set_ep0state(dev, WAIT_FOR_SETUP); | |
577 | } | |
578 | ||
579 | /** | |
580 | * inc_ep_stats_reqs - Update ep stats counts | |
581 | * @ep: physical endpoint | |
582 | * @req: usb request | |
583 | * @is_in: ep direction (USB_DIR_IN or 0) | |
584 | * | |
585 | */ | |
586 | static void inc_ep_stats_reqs(struct pxa_ep *ep, int is_in) | |
587 | { | |
588 | if (is_in) | |
589 | ep->stats.in_ops++; | |
590 | else | |
591 | ep->stats.out_ops++; | |
592 | } | |
593 | ||
594 | /** | |
595 | * inc_ep_stats_bytes - Update ep stats counts | |
596 | * @ep: physical endpoint | |
25985edc | 597 | * @count: bytes transferred on endpoint |
d75379a5 RJ |
598 | * @is_in: ep direction (USB_DIR_IN or 0) |
599 | */ | |
600 | static void inc_ep_stats_bytes(struct pxa_ep *ep, int count, int is_in) | |
601 | { | |
602 | if (is_in) | |
603 | ep->stats.in_bytes += count; | |
604 | else | |
605 | ep->stats.out_bytes += count; | |
606 | } | |
607 | ||
608 | /** | |
609 | * pxa_ep_setup - Sets up an usb physical endpoint | |
610 | * @ep: pxa27x physical endpoint | |
611 | * | |
612 | * Find the physical pxa27x ep, and setup its UDCCR | |
613 | */ | |
614 | static __init void pxa_ep_setup(struct pxa_ep *ep) | |
615 | { | |
616 | u32 new_udccr; | |
617 | ||
618 | new_udccr = ((ep->config << UDCCONR_CN_S) & UDCCONR_CN) | |
619 | | ((ep->interface << UDCCONR_IN_S) & UDCCONR_IN) | |
620 | | ((ep->alternate << UDCCONR_AISN_S) & UDCCONR_AISN) | |
621 | | ((EPADDR(ep) << UDCCONR_EN_S) & UDCCONR_EN) | |
622 | | ((EPXFERTYPE(ep) << UDCCONR_ET_S) & UDCCONR_ET) | |
623 | | ((ep->dir_in) ? UDCCONR_ED : 0) | |
624 | | ((ep->fifo_size << UDCCONR_MPS_S) & UDCCONR_MPS) | |
625 | | UDCCONR_EE; | |
626 | ||
627 | udc_ep_writel(ep, UDCCR, new_udccr); | |
628 | } | |
629 | ||
630 | /** | |
631 | * pxa_eps_setup - Sets up all usb physical endpoints | |
632 | * @dev: udc device | |
633 | * | |
634 | * Setup all pxa physical endpoints, except ep0 | |
635 | */ | |
636 | static __init void pxa_eps_setup(struct pxa_udc *dev) | |
637 | { | |
638 | unsigned int i; | |
639 | ||
640 | dev_dbg(dev->dev, "%s: dev=%p\n", __func__, dev); | |
641 | ||
642 | for (i = 1; i < NR_PXA_ENDPOINTS; i++) | |
643 | pxa_ep_setup(&dev->pxa_ep[i]); | |
644 | } | |
645 | ||
646 | /** | |
647 | * pxa_ep_alloc_request - Allocate usb request | |
648 | * @_ep: usb endpoint | |
649 | * @gfp_flags: | |
650 | * | |
651 | * For the pxa27x, these can just wrap kmalloc/kfree. gadget drivers | |
652 | * must still pass correctly initialized endpoints, since other controller | |
653 | * drivers may care about how it's currently set up (dma issues etc). | |
654 | */ | |
655 | static struct usb_request * | |
656 | pxa_ep_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) | |
657 | { | |
658 | struct pxa27x_request *req; | |
659 | ||
660 | req = kzalloc(sizeof *req, gfp_flags); | |
3131f7b0 | 661 | if (!req) |
d75379a5 RJ |
662 | return NULL; |
663 | ||
664 | INIT_LIST_HEAD(&req->queue); | |
665 | req->in_use = 0; | |
666 | req->udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); | |
667 | ||
668 | return &req->req; | |
669 | } | |
670 | ||
671 | /** | |
672 | * pxa_ep_free_request - Free usb request | |
673 | * @_ep: usb endpoint | |
674 | * @_req: usb request | |
675 | * | |
676 | * Wrapper around kfree to free _req | |
677 | */ | |
678 | static void pxa_ep_free_request(struct usb_ep *_ep, struct usb_request *_req) | |
679 | { | |
680 | struct pxa27x_request *req; | |
681 | ||
682 | req = container_of(_req, struct pxa27x_request, req); | |
683 | WARN_ON(!list_empty(&req->queue)); | |
684 | kfree(req); | |
685 | } | |
686 | ||
687 | /** | |
688 | * ep_add_request - add a request to the endpoint's queue | |
689 | * @ep: usb endpoint | |
690 | * @req: usb request | |
691 | * | |
692 | * Context: ep->lock held | |
693 | * | |
694 | * Queues the request in the endpoint's queue, and enables the interrupts | |
695 | * on the endpoint. | |
696 | */ | |
697 | static void ep_add_request(struct pxa_ep *ep, struct pxa27x_request *req) | |
698 | { | |
699 | if (unlikely(!req)) | |
700 | return; | |
701 | ep_vdbg(ep, "req:%p, lg=%d, udccsr=0x%03x\n", req, | |
702 | req->req.length, udc_ep_readl(ep, UDCCSR)); | |
703 | ||
704 | req->in_use = 1; | |
705 | list_add_tail(&req->queue, &ep->queue); | |
706 | pio_irq_enable(ep); | |
707 | } | |
708 | ||
709 | /** | |
710 | * ep_del_request - removes a request from the endpoint's queue | |
711 | * @ep: usb endpoint | |
712 | * @req: usb request | |
713 | * | |
714 | * Context: ep->lock held | |
715 | * | |
716 | * Unqueue the request from the endpoint's queue. If there are no more requests | |
717 | * on the endpoint, and if it's not the control endpoint, interrupts are | |
718 | * disabled on the endpoint. | |
719 | */ | |
720 | static void ep_del_request(struct pxa_ep *ep, struct pxa27x_request *req) | |
721 | { | |
722 | if (unlikely(!req)) | |
723 | return; | |
724 | ep_vdbg(ep, "req:%p, lg=%d, udccsr=0x%03x\n", req, | |
725 | req->req.length, udc_ep_readl(ep, UDCCSR)); | |
726 | ||
727 | list_del_init(&req->queue); | |
728 | req->in_use = 0; | |
729 | if (!is_ep0(ep) && list_empty(&ep->queue)) | |
730 | pio_irq_disable(ep); | |
731 | } | |
732 | ||
733 | /** | |
734 | * req_done - Complete an usb request | |
735 | * @ep: pxa physical endpoint | |
736 | * @req: pxa request | |
737 | * @status: usb request status sent to gadget API | |
5e23e90f | 738 | * @pflags: flags of previous spinlock_irq_save() or NULL if no lock held |
d75379a5 | 739 | * |
5e23e90f | 740 | * Context: ep->lock held if flags not NULL, else ep->lock released |
d75379a5 RJ |
741 | * |
742 | * Retire a pxa27x usb request. Endpoint must be locked. | |
743 | */ | |
5e23e90f RJ |
744 | static void req_done(struct pxa_ep *ep, struct pxa27x_request *req, int status, |
745 | unsigned long *pflags) | |
d75379a5 | 746 | { |
5e23e90f RJ |
747 | unsigned long flags; |
748 | ||
d75379a5 RJ |
749 | ep_del_request(ep, req); |
750 | if (likely(req->req.status == -EINPROGRESS)) | |
751 | req->req.status = status; | |
752 | else | |
753 | status = req->req.status; | |
754 | ||
755 | if (status && status != -ESHUTDOWN) | |
756 | ep_dbg(ep, "complete req %p stat %d len %u/%u\n", | |
757 | &req->req, status, | |
758 | req->req.actual, req->req.length); | |
759 | ||
5e23e90f RJ |
760 | if (pflags) |
761 | spin_unlock_irqrestore(&ep->lock, *pflags); | |
762 | local_irq_save(flags); | |
d75379a5 | 763 | req->req.complete(&req->udc_usb_ep->usb_ep, &req->req); |
5e23e90f RJ |
764 | local_irq_restore(flags); |
765 | if (pflags) | |
766 | spin_lock_irqsave(&ep->lock, *pflags); | |
d75379a5 RJ |
767 | } |
768 | ||
769 | /** | |
4c24b6d0 | 770 | * ep_end_out_req - Ends endpoint OUT request |
d75379a5 RJ |
771 | * @ep: physical endpoint |
772 | * @req: pxa request | |
5e23e90f | 773 | * @pflags: flags of previous spinlock_irq_save() or NULL if no lock held |
d75379a5 | 774 | * |
5e23e90f | 775 | * Context: ep->lock held or released (see req_done()) |
d75379a5 | 776 | * |
4c24b6d0 | 777 | * Ends endpoint OUT request (completes usb request). |
d75379a5 | 778 | */ |
5e23e90f RJ |
779 | static void ep_end_out_req(struct pxa_ep *ep, struct pxa27x_request *req, |
780 | unsigned long *pflags) | |
d75379a5 RJ |
781 | { |
782 | inc_ep_stats_reqs(ep, !USB_DIR_IN); | |
5e23e90f | 783 | req_done(ep, req, 0, pflags); |
d75379a5 RJ |
784 | } |
785 | ||
786 | /** | |
4c24b6d0 | 787 | * ep0_end_out_req - Ends control endpoint OUT request (ends data stage) |
d75379a5 RJ |
788 | * @ep: physical endpoint |
789 | * @req: pxa request | |
5e23e90f | 790 | * @pflags: flags of previous spinlock_irq_save() or NULL if no lock held |
d75379a5 | 791 | * |
5e23e90f | 792 | * Context: ep->lock held or released (see req_done()) |
d75379a5 | 793 | * |
4c24b6d0 | 794 | * Ends control endpoint OUT request (completes usb request), and puts |
d75379a5 RJ |
795 | * control endpoint into idle state |
796 | */ | |
5e23e90f RJ |
797 | static void ep0_end_out_req(struct pxa_ep *ep, struct pxa27x_request *req, |
798 | unsigned long *pflags) | |
d75379a5 RJ |
799 | { |
800 | set_ep0state(ep->dev, OUT_STATUS_STAGE); | |
5e23e90f | 801 | ep_end_out_req(ep, req, pflags); |
d75379a5 RJ |
802 | ep0_idle(ep->dev); |
803 | } | |
804 | ||
805 | /** | |
4c24b6d0 | 806 | * ep_end_in_req - Ends endpoint IN request |
d75379a5 RJ |
807 | * @ep: physical endpoint |
808 | * @req: pxa request | |
5e23e90f | 809 | * @pflags: flags of previous spinlock_irq_save() or NULL if no lock held |
d75379a5 | 810 | * |
5e23e90f | 811 | * Context: ep->lock held or released (see req_done()) |
d75379a5 | 812 | * |
4c24b6d0 | 813 | * Ends endpoint IN request (completes usb request). |
d75379a5 | 814 | */ |
5e23e90f RJ |
815 | static void ep_end_in_req(struct pxa_ep *ep, struct pxa27x_request *req, |
816 | unsigned long *pflags) | |
d75379a5 RJ |
817 | { |
818 | inc_ep_stats_reqs(ep, USB_DIR_IN); | |
5e23e90f | 819 | req_done(ep, req, 0, pflags); |
d75379a5 RJ |
820 | } |
821 | ||
822 | /** | |
4c24b6d0 | 823 | * ep0_end_in_req - Ends control endpoint IN request (ends data stage) |
d75379a5 RJ |
824 | * @ep: physical endpoint |
825 | * @req: pxa request | |
5e23e90f | 826 | * @pflags: flags of previous spinlock_irq_save() or NULL if no lock held |
d75379a5 | 827 | * |
5e23e90f | 828 | * Context: ep->lock held or released (see req_done()) |
d75379a5 | 829 | * |
4c24b6d0 | 830 | * Ends control endpoint IN request (completes usb request), and puts |
d75379a5 RJ |
831 | * control endpoint into status state |
832 | */ | |
5e23e90f RJ |
833 | static void ep0_end_in_req(struct pxa_ep *ep, struct pxa27x_request *req, |
834 | unsigned long *pflags) | |
d75379a5 | 835 | { |
4c24b6d0 | 836 | set_ep0state(ep->dev, IN_STATUS_STAGE); |
5e23e90f | 837 | ep_end_in_req(ep, req, pflags); |
d75379a5 RJ |
838 | } |
839 | ||
840 | /** | |
841 | * nuke - Dequeue all requests | |
842 | * @ep: pxa endpoint | |
843 | * @status: usb request status | |
844 | * | |
5e23e90f | 845 | * Context: ep->lock released |
d75379a5 RJ |
846 | * |
847 | * Dequeues all requests on an endpoint. As a side effect, interrupts will be | |
848 | * disabled on that endpoint (because no more requests). | |
849 | */ | |
850 | static void nuke(struct pxa_ep *ep, int status) | |
851 | { | |
5e23e90f RJ |
852 | struct pxa27x_request *req; |
853 | unsigned long flags; | |
d75379a5 | 854 | |
5e23e90f | 855 | spin_lock_irqsave(&ep->lock, flags); |
d75379a5 RJ |
856 | while (!list_empty(&ep->queue)) { |
857 | req = list_entry(ep->queue.next, struct pxa27x_request, queue); | |
5e23e90f | 858 | req_done(ep, req, status, &flags); |
d75379a5 | 859 | } |
5e23e90f | 860 | spin_unlock_irqrestore(&ep->lock, flags); |
d75379a5 RJ |
861 | } |
862 | ||
863 | /** | |
864 | * read_packet - transfer 1 packet from an OUT endpoint into request | |
865 | * @ep: pxa physical endpoint | |
866 | * @req: usb request | |
867 | * | |
868 | * Takes bytes from OUT endpoint and transfers them info the usb request. | |
869 | * If there is less space in request than bytes received in OUT endpoint, | |
870 | * bytes are left in the OUT endpoint. | |
871 | * | |
25985edc | 872 | * Returns how many bytes were actually transferred |
d75379a5 RJ |
873 | */ |
874 | static int read_packet(struct pxa_ep *ep, struct pxa27x_request *req) | |
875 | { | |
876 | u32 *buf; | |
877 | int bytes_ep, bufferspace, count, i; | |
878 | ||
879 | bytes_ep = ep_count_bytes_remain(ep); | |
880 | bufferspace = req->req.length - req->req.actual; | |
881 | ||
882 | buf = (u32 *)(req->req.buf + req->req.actual); | |
883 | prefetchw(buf); | |
884 | ||
885 | if (likely(!ep_is_empty(ep))) | |
886 | count = min(bytes_ep, bufferspace); | |
887 | else /* zlp */ | |
888 | count = 0; | |
889 | ||
890 | for (i = count; i > 0; i -= 4) | |
891 | *buf++ = udc_ep_readl(ep, UDCDR); | |
892 | req->req.actual += count; | |
893 | ||
367815ee | 894 | ep_write_UDCCSR(ep, UDCCSR_PC); |
d75379a5 RJ |
895 | |
896 | return count; | |
897 | } | |
898 | ||
899 | /** | |
900 | * write_packet - transfer 1 packet from request into an IN endpoint | |
901 | * @ep: pxa physical endpoint | |
902 | * @req: usb request | |
903 | * @max: max bytes that fit into endpoint | |
904 | * | |
905 | * Takes bytes from usb request, and transfers them into the physical | |
906 | * endpoint. If there are no bytes to transfer, doesn't write anything | |
907 | * to physical endpoint. | |
908 | * | |
25985edc | 909 | * Returns how many bytes were actually transferred. |
d75379a5 RJ |
910 | */ |
911 | static int write_packet(struct pxa_ep *ep, struct pxa27x_request *req, | |
912 | unsigned int max) | |
913 | { | |
914 | int length, count, remain, i; | |
915 | u32 *buf; | |
916 | u8 *buf_8; | |
917 | ||
918 | buf = (u32 *)(req->req.buf + req->req.actual); | |
919 | prefetch(buf); | |
920 | ||
921 | length = min(req->req.length - req->req.actual, max); | |
922 | req->req.actual += length; | |
923 | ||
924 | remain = length & 0x3; | |
925 | count = length & ~(0x3); | |
926 | for (i = count; i > 0 ; i -= 4) | |
927 | udc_ep_writel(ep, UDCDR, *buf++); | |
928 | ||
929 | buf_8 = (u8 *)buf; | |
930 | for (i = remain; i > 0; i--) | |
931 | udc_ep_writeb(ep, UDCDR, *buf_8++); | |
932 | ||
933 | ep_vdbg(ep, "length=%d+%d, udccsr=0x%03x\n", count, remain, | |
934 | udc_ep_readl(ep, UDCCSR)); | |
935 | ||
936 | return length; | |
937 | } | |
938 | ||
939 | /** | |
940 | * read_fifo - Transfer packets from OUT endpoint into usb request | |
941 | * @ep: pxa physical endpoint | |
942 | * @req: usb request | |
943 | * | |
944 | * Context: callable when in_interrupt() | |
945 | * | |
946 | * Unload as many packets as possible from the fifo we use for usb OUT | |
947 | * transfers and put them into the request. Caller should have made sure | |
948 | * there's at least one packet ready. | |
949 | * Doesn't complete the request, that's the caller's job | |
950 | * | |
951 | * Returns 1 if the request completed, 0 otherwise | |
952 | */ | |
953 | static int read_fifo(struct pxa_ep *ep, struct pxa27x_request *req) | |
954 | { | |
955 | int count, is_short, completed = 0; | |
956 | ||
957 | while (epout_has_pkt(ep)) { | |
958 | count = read_packet(ep, req); | |
959 | inc_ep_stats_bytes(ep, count, !USB_DIR_IN); | |
960 | ||
961 | is_short = (count < ep->fifo_size); | |
962 | ep_dbg(ep, "read udccsr:%03x, count:%d bytes%s req %p %d/%d\n", | |
963 | udc_ep_readl(ep, UDCCSR), count, is_short ? "/S" : "", | |
964 | &req->req, req->req.actual, req->req.length); | |
965 | ||
966 | /* completion */ | |
967 | if (is_short || req->req.actual == req->req.length) { | |
968 | completed = 1; | |
969 | break; | |
970 | } | |
971 | /* finished that packet. the next one may be waiting... */ | |
972 | } | |
973 | return completed; | |
974 | } | |
975 | ||
976 | /** | |
977 | * write_fifo - transfer packets from usb request into an IN endpoint | |
978 | * @ep: pxa physical endpoint | |
979 | * @req: pxa usb request | |
980 | * | |
981 | * Write to an IN endpoint fifo, as many packets as possible. | |
982 | * irqs will use this to write the rest later. | |
983 | * caller guarantees at least one packet buffer is ready (or a zlp). | |
984 | * Doesn't complete the request, that's the caller's job | |
985 | * | |
25985edc | 986 | * Returns 1 if request fully transferred, 0 if partial transfer |
d75379a5 RJ |
987 | */ |
988 | static int write_fifo(struct pxa_ep *ep, struct pxa27x_request *req) | |
989 | { | |
990 | unsigned max; | |
991 | int count, is_short, is_last = 0, completed = 0, totcount = 0; | |
992 | u32 udccsr; | |
993 | ||
994 | max = ep->fifo_size; | |
995 | do { | |
996 | is_short = 0; | |
997 | ||
998 | udccsr = udc_ep_readl(ep, UDCCSR); | |
999 | if (udccsr & UDCCSR_PC) { | |
1000 | ep_vdbg(ep, "Clearing Transmit Complete, udccsr=%x\n", | |
1001 | udccsr); | |
367815ee | 1002 | ep_write_UDCCSR(ep, UDCCSR_PC); |
d75379a5 RJ |
1003 | } |
1004 | if (udccsr & UDCCSR_TRN) { | |
1005 | ep_vdbg(ep, "Clearing Underrun on, udccsr=%x\n", | |
1006 | udccsr); | |
367815ee | 1007 | ep_write_UDCCSR(ep, UDCCSR_TRN); |
d75379a5 RJ |
1008 | } |
1009 | ||
1010 | count = write_packet(ep, req, max); | |
1011 | inc_ep_stats_bytes(ep, count, USB_DIR_IN); | |
1012 | totcount += count; | |
1013 | ||
1014 | /* last packet is usually short (or a zlp) */ | |
1015 | if (unlikely(count < max)) { | |
1016 | is_last = 1; | |
1017 | is_short = 1; | |
1018 | } else { | |
1019 | if (likely(req->req.length > req->req.actual) | |
1020 | || req->req.zero) | |
1021 | is_last = 0; | |
1022 | else | |
1023 | is_last = 1; | |
1024 | /* interrupt/iso maxpacket may not fill the fifo */ | |
1025 | is_short = unlikely(max < ep->fifo_size); | |
1026 | } | |
1027 | ||
1028 | if (is_short) | |
367815ee | 1029 | ep_write_UDCCSR(ep, UDCCSR_SP); |
d75379a5 RJ |
1030 | |
1031 | /* requests complete when all IN data is in the FIFO */ | |
1032 | if (is_last) { | |
1033 | completed = 1; | |
1034 | break; | |
1035 | } | |
1036 | } while (!ep_is_full(ep)); | |
1037 | ||
1038 | ep_dbg(ep, "wrote count:%d bytes%s%s, left:%d req=%p\n", | |
1039 | totcount, is_last ? "/L" : "", is_short ? "/S" : "", | |
1040 | req->req.length - req->req.actual, &req->req); | |
1041 | ||
1042 | return completed; | |
1043 | } | |
1044 | ||
1045 | /** | |
1046 | * read_ep0_fifo - Transfer packets from control endpoint into usb request | |
1047 | * @ep: control endpoint | |
1048 | * @req: pxa usb request | |
1049 | * | |
1050 | * Special ep0 version of the above read_fifo. Reads as many bytes from control | |
1051 | * endpoint as can be read, and stores them into usb request (limited by request | |
1052 | * maximum length). | |
1053 | * | |
1054 | * Returns 0 if usb request only partially filled, 1 if fully filled | |
1055 | */ | |
1056 | static int read_ep0_fifo(struct pxa_ep *ep, struct pxa27x_request *req) | |
1057 | { | |
1058 | int count, is_short, completed = 0; | |
1059 | ||
1060 | while (epout_has_pkt(ep)) { | |
1061 | count = read_packet(ep, req); | |
367815ee | 1062 | ep_write_UDCCSR(ep, UDCCSR0_OPC); |
d75379a5 RJ |
1063 | inc_ep_stats_bytes(ep, count, !USB_DIR_IN); |
1064 | ||
1065 | is_short = (count < ep->fifo_size); | |
1066 | ep_dbg(ep, "read udccsr:%03x, count:%d bytes%s req %p %d/%d\n", | |
1067 | udc_ep_readl(ep, UDCCSR), count, is_short ? "/S" : "", | |
1068 | &req->req, req->req.actual, req->req.length); | |
1069 | ||
1070 | if (is_short || req->req.actual >= req->req.length) { | |
1071 | completed = 1; | |
1072 | break; | |
1073 | } | |
1074 | } | |
1075 | ||
1076 | return completed; | |
1077 | } | |
1078 | ||
1079 | /** | |
1080 | * write_ep0_fifo - Send a request to control endpoint (ep0 in) | |
1081 | * @ep: control endpoint | |
1082 | * @req: request | |
1083 | * | |
1084 | * Context: callable when in_interrupt() | |
1085 | * | |
1086 | * Sends a request (or a part of the request) to the control endpoint (ep0 in). | |
1087 | * If the request doesn't fit, the remaining part will be sent from irq. | |
1088 | * The request is considered fully written only if either : | |
25985edc | 1089 | * - last write transferred all remaining bytes, but fifo was not fully filled |
d75379a5 RJ |
1090 | * - last write was a 0 length write |
1091 | * | |
1092 | * Returns 1 if request fully written, 0 if request only partially sent | |
1093 | */ | |
1094 | static int write_ep0_fifo(struct pxa_ep *ep, struct pxa27x_request *req) | |
1095 | { | |
1096 | unsigned count; | |
1097 | int is_last, is_short; | |
1098 | ||
1099 | count = write_packet(ep, req, EP0_FIFO_SIZE); | |
1100 | inc_ep_stats_bytes(ep, count, USB_DIR_IN); | |
1101 | ||
1102 | is_short = (count < EP0_FIFO_SIZE); | |
1103 | is_last = ((count == 0) || (count < EP0_FIFO_SIZE)); | |
1104 | ||
1105 | /* Sends either a short packet or a 0 length packet */ | |
1106 | if (unlikely(is_short)) | |
367815ee | 1107 | ep_write_UDCCSR(ep, UDCCSR0_IPR); |
d75379a5 RJ |
1108 | |
1109 | ep_dbg(ep, "in %d bytes%s%s, %d left, req=%p, udccsr0=0x%03x\n", | |
1110 | count, is_short ? "/S" : "", is_last ? "/L" : "", | |
1111 | req->req.length - req->req.actual, | |
1112 | &req->req, udc_ep_readl(ep, UDCCSR)); | |
1113 | ||
1114 | return is_last; | |
1115 | } | |
1116 | ||
1117 | /** | |
1118 | * pxa_ep_queue - Queue a request into an IN endpoint | |
1119 | * @_ep: usb endpoint | |
1120 | * @_req: usb request | |
1121 | * @gfp_flags: flags | |
1122 | * | |
1123 | * Context: normally called when !in_interrupt, but callable when in_interrupt() | |
1124 | * in the special case of ep0 setup : | |
1125 | * (irq->handle_ep0_ctrl_req->gadget_setup->pxa_ep_queue) | |
1126 | * | |
1127 | * Returns 0 if succedeed, error otherwise | |
1128 | */ | |
1129 | static int pxa_ep_queue(struct usb_ep *_ep, struct usb_request *_req, | |
1130 | gfp_t gfp_flags) | |
1131 | { | |
1132 | struct udc_usb_ep *udc_usb_ep; | |
1133 | struct pxa_ep *ep; | |
1134 | struct pxa27x_request *req; | |
1135 | struct pxa_udc *dev; | |
1136 | unsigned long flags; | |
1137 | int rc = 0; | |
1138 | int is_first_req; | |
1139 | unsigned length; | |
5e23e90f | 1140 | int recursion_detected; |
d75379a5 RJ |
1141 | |
1142 | req = container_of(_req, struct pxa27x_request, req); | |
1143 | udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); | |
1144 | ||
1145 | if (unlikely(!_req || !_req->complete || !_req->buf)) | |
1146 | return -EINVAL; | |
1147 | ||
1148 | if (unlikely(!_ep)) | |
1149 | return -EINVAL; | |
1150 | ||
1151 | dev = udc_usb_ep->dev; | |
1152 | ep = udc_usb_ep->pxa_ep; | |
1153 | if (unlikely(!ep)) | |
1154 | return -EINVAL; | |
1155 | ||
1156 | dev = ep->dev; | |
1157 | if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) { | |
1158 | ep_dbg(ep, "bogus device state\n"); | |
1159 | return -ESHUTDOWN; | |
1160 | } | |
1161 | ||
1162 | /* iso is always one packet per request, that's the only way | |
1163 | * we can report per-packet status. that also helps with dma. | |
1164 | */ | |
1165 | if (unlikely(EPXFERTYPE_is_ISO(ep) | |
1166 | && req->req.length > ep->fifo_size)) | |
1167 | return -EMSGSIZE; | |
1168 | ||
1169 | spin_lock_irqsave(&ep->lock, flags); | |
5e23e90f | 1170 | recursion_detected = ep->in_handle_ep; |
d75379a5 RJ |
1171 | |
1172 | is_first_req = list_empty(&ep->queue); | |
1173 | ep_dbg(ep, "queue req %p(first=%s), len %d buf %p\n", | |
1174 | _req, is_first_req ? "yes" : "no", | |
1175 | _req->length, _req->buf); | |
1176 | ||
1177 | if (!ep->enabled) { | |
1178 | _req->status = -ESHUTDOWN; | |
1179 | rc = -ESHUTDOWN; | |
5e23e90f | 1180 | goto out_locked; |
d75379a5 RJ |
1181 | } |
1182 | ||
1183 | if (req->in_use) { | |
1184 | ep_err(ep, "refusing to queue req %p (already queued)\n", req); | |
5e23e90f | 1185 | goto out_locked; |
d75379a5 RJ |
1186 | } |
1187 | ||
1188 | length = _req->length; | |
1189 | _req->status = -EINPROGRESS; | |
1190 | _req->actual = 0; | |
1191 | ||
1192 | ep_add_request(ep, req); | |
5e23e90f | 1193 | spin_unlock_irqrestore(&ep->lock, flags); |
d75379a5 RJ |
1194 | |
1195 | if (is_ep0(ep)) { | |
1196 | switch (dev->ep0state) { | |
1197 | case WAIT_ACK_SET_CONF_INTERF: | |
1198 | if (length == 0) { | |
5e23e90f | 1199 | ep_end_in_req(ep, req, NULL); |
d75379a5 RJ |
1200 | } else { |
1201 | ep_err(ep, "got a request of %d bytes while" | |
4c24b6d0 | 1202 | "in state WAIT_ACK_SET_CONF_INTERF\n", |
d75379a5 RJ |
1203 | length); |
1204 | ep_del_request(ep, req); | |
1205 | rc = -EL2HLT; | |
1206 | } | |
1207 | ep0_idle(ep->dev); | |
1208 | break; | |
1209 | case IN_DATA_STAGE: | |
1210 | if (!ep_is_full(ep)) | |
1211 | if (write_ep0_fifo(ep, req)) | |
5e23e90f | 1212 | ep0_end_in_req(ep, req, NULL); |
d75379a5 RJ |
1213 | break; |
1214 | case OUT_DATA_STAGE: | |
1215 | if ((length == 0) || !epout_has_pkt(ep)) | |
1216 | if (read_ep0_fifo(ep, req)) | |
5e23e90f | 1217 | ep0_end_out_req(ep, req, NULL); |
d75379a5 RJ |
1218 | break; |
1219 | default: | |
1220 | ep_err(ep, "odd state %s to send me a request\n", | |
1221 | EP0_STNAME(ep->dev)); | |
1222 | ep_del_request(ep, req); | |
1223 | rc = -EL2HLT; | |
1224 | break; | |
1225 | } | |
1226 | } else { | |
5e23e90f RJ |
1227 | if (!recursion_detected) |
1228 | handle_ep(ep); | |
d75379a5 RJ |
1229 | } |
1230 | ||
1231 | out: | |
d75379a5 | 1232 | return rc; |
5e23e90f RJ |
1233 | out_locked: |
1234 | spin_unlock_irqrestore(&ep->lock, flags); | |
1235 | goto out; | |
d75379a5 RJ |
1236 | } |
1237 | ||
1238 | /** | |
1239 | * pxa_ep_dequeue - Dequeue one request | |
1240 | * @_ep: usb endpoint | |
1241 | * @_req: usb request | |
1242 | * | |
1243 | * Return 0 if no error, -EINVAL or -ECONNRESET otherwise | |
1244 | */ | |
1245 | static int pxa_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) | |
1246 | { | |
1247 | struct pxa_ep *ep; | |
1248 | struct udc_usb_ep *udc_usb_ep; | |
1249 | struct pxa27x_request *req; | |
1250 | unsigned long flags; | |
4c24b6d0 | 1251 | int rc = -EINVAL; |
d75379a5 RJ |
1252 | |
1253 | if (!_ep) | |
4c24b6d0 | 1254 | return rc; |
d75379a5 RJ |
1255 | udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); |
1256 | ep = udc_usb_ep->pxa_ep; | |
1257 | if (!ep || is_ep0(ep)) | |
4c24b6d0 | 1258 | return rc; |
d75379a5 RJ |
1259 | |
1260 | spin_lock_irqsave(&ep->lock, flags); | |
1261 | ||
1262 | /* make sure it's actually queued on this endpoint */ | |
1263 | list_for_each_entry(req, &ep->queue, queue) { | |
4c24b6d0 | 1264 | if (&req->req == _req) { |
4c24b6d0 | 1265 | rc = 0; |
d75379a5 | 1266 | break; |
4c24b6d0 | 1267 | } |
d75379a5 RJ |
1268 | } |
1269 | ||
d75379a5 | 1270 | spin_unlock_irqrestore(&ep->lock, flags); |
5e23e90f RJ |
1271 | if (!rc) |
1272 | req_done(ep, req, -ECONNRESET, NULL); | |
d75379a5 RJ |
1273 | return rc; |
1274 | } | |
1275 | ||
1276 | /** | |
1277 | * pxa_ep_set_halt - Halts operations on one endpoint | |
1278 | * @_ep: usb endpoint | |
1279 | * @value: | |
1280 | * | |
1281 | * Returns 0 if no error, -EINVAL, -EROFS, -EAGAIN otherwise | |
1282 | */ | |
1283 | static int pxa_ep_set_halt(struct usb_ep *_ep, int value) | |
1284 | { | |
1285 | struct pxa_ep *ep; | |
1286 | struct udc_usb_ep *udc_usb_ep; | |
1287 | unsigned long flags; | |
1288 | int rc; | |
1289 | ||
1290 | ||
1291 | if (!_ep) | |
1292 | return -EINVAL; | |
1293 | udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); | |
1294 | ep = udc_usb_ep->pxa_ep; | |
1295 | if (!ep || is_ep0(ep)) | |
1296 | return -EINVAL; | |
1297 | ||
1298 | if (value == 0) { | |
1299 | /* | |
1300 | * This path (reset toggle+halt) is needed to implement | |
1301 | * SET_INTERFACE on normal hardware. but it can't be | |
1302 | * done from software on the PXA UDC, and the hardware | |
1303 | * forgets to do it as part of SET_INTERFACE automagic. | |
1304 | */ | |
1305 | ep_dbg(ep, "only host can clear halt\n"); | |
1306 | return -EROFS; | |
1307 | } | |
1308 | ||
1309 | spin_lock_irqsave(&ep->lock, flags); | |
1310 | ||
1311 | rc = -EAGAIN; | |
1312 | if (ep->dir_in && (ep_is_full(ep) || !list_empty(&ep->queue))) | |
1313 | goto out; | |
1314 | ||
1315 | /* FST, FEF bits are the same for control and non control endpoints */ | |
1316 | rc = 0; | |
367815ee | 1317 | ep_write_UDCCSR(ep, UDCCSR_FST | UDCCSR_FEF); |
d75379a5 RJ |
1318 | if (is_ep0(ep)) |
1319 | set_ep0state(ep->dev, STALL); | |
1320 | ||
1321 | out: | |
1322 | spin_unlock_irqrestore(&ep->lock, flags); | |
1323 | return rc; | |
1324 | } | |
1325 | ||
1326 | /** | |
1327 | * pxa_ep_fifo_status - Get how many bytes in physical endpoint | |
1328 | * @_ep: usb endpoint | |
1329 | * | |
1330 | * Returns number of bytes in OUT fifos. Broken for IN fifos. | |
1331 | */ | |
1332 | static int pxa_ep_fifo_status(struct usb_ep *_ep) | |
1333 | { | |
1334 | struct pxa_ep *ep; | |
1335 | struct udc_usb_ep *udc_usb_ep; | |
1336 | ||
1337 | if (!_ep) | |
1338 | return -ENODEV; | |
1339 | udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); | |
1340 | ep = udc_usb_ep->pxa_ep; | |
1341 | if (!ep || is_ep0(ep)) | |
1342 | return -ENODEV; | |
1343 | ||
1344 | if (ep->dir_in) | |
1345 | return -EOPNOTSUPP; | |
1346 | if (ep->dev->gadget.speed == USB_SPEED_UNKNOWN || ep_is_empty(ep)) | |
1347 | return 0; | |
1348 | else | |
1349 | return ep_count_bytes_remain(ep) + 1; | |
1350 | } | |
1351 | ||
1352 | /** | |
1353 | * pxa_ep_fifo_flush - Flushes one endpoint | |
1354 | * @_ep: usb endpoint | |
1355 | * | |
1356 | * Discards all data in one endpoint(IN or OUT), except control endpoint. | |
1357 | */ | |
1358 | static void pxa_ep_fifo_flush(struct usb_ep *_ep) | |
1359 | { | |
1360 | struct pxa_ep *ep; | |
1361 | struct udc_usb_ep *udc_usb_ep; | |
1362 | unsigned long flags; | |
1363 | ||
1364 | if (!_ep) | |
1365 | return; | |
1366 | udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); | |
1367 | ep = udc_usb_ep->pxa_ep; | |
1368 | if (!ep || is_ep0(ep)) | |
1369 | return; | |
1370 | ||
1371 | spin_lock_irqsave(&ep->lock, flags); | |
1372 | ||
1373 | if (unlikely(!list_empty(&ep->queue))) | |
1374 | ep_dbg(ep, "called while queue list not empty\n"); | |
1375 | ep_dbg(ep, "called\n"); | |
1376 | ||
1377 | /* for OUT, just read and discard the FIFO contents. */ | |
1378 | if (!ep->dir_in) { | |
1379 | while (!ep_is_empty(ep)) | |
1380 | udc_ep_readl(ep, UDCDR); | |
1381 | } else { | |
1382 | /* most IN status is the same, but ISO can't stall */ | |
367815ee | 1383 | ep_write_UDCCSR(ep, |
d75379a5 RJ |
1384 | UDCCSR_PC | UDCCSR_FEF | UDCCSR_TRN |
1385 | | (EPXFERTYPE_is_ISO(ep) ? 0 : UDCCSR_SST)); | |
1386 | } | |
1387 | ||
1388 | spin_unlock_irqrestore(&ep->lock, flags); | |
d75379a5 RJ |
1389 | } |
1390 | ||
1391 | /** | |
1392 | * pxa_ep_enable - Enables usb endpoint | |
1393 | * @_ep: usb endpoint | |
1394 | * @desc: usb endpoint descriptor | |
1395 | * | |
1396 | * Nothing much to do here, as ep configuration is done once and for all | |
1397 | * before udc is enabled. After udc enable, no physical endpoint configuration | |
1398 | * can be changed. | |
1399 | * Function makes sanity checks and flushes the endpoint. | |
1400 | */ | |
1401 | static int pxa_ep_enable(struct usb_ep *_ep, | |
1402 | const struct usb_endpoint_descriptor *desc) | |
1403 | { | |
1404 | struct pxa_ep *ep; | |
1405 | struct udc_usb_ep *udc_usb_ep; | |
1406 | struct pxa_udc *udc; | |
1407 | ||
1408 | if (!_ep || !desc) | |
1409 | return -EINVAL; | |
1410 | ||
1411 | udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); | |
1412 | if (udc_usb_ep->pxa_ep) { | |
1413 | ep = udc_usb_ep->pxa_ep; | |
1414 | ep_warn(ep, "usb_ep %s already enabled, doing nothing\n", | |
1415 | _ep->name); | |
1416 | } else { | |
1417 | ep = find_pxa_ep(udc_usb_ep->dev, udc_usb_ep); | |
1418 | } | |
1419 | ||
1420 | if (!ep || is_ep0(ep)) { | |
1421 | dev_err(udc_usb_ep->dev->dev, | |
1422 | "unable to match pxa_ep for ep %s\n", | |
1423 | _ep->name); | |
1424 | return -EINVAL; | |
1425 | } | |
1426 | ||
1427 | if ((desc->bDescriptorType != USB_DT_ENDPOINT) | |
1428 | || (ep->type != usb_endpoint_type(desc))) { | |
1429 | ep_err(ep, "type mismatch\n"); | |
1430 | return -EINVAL; | |
1431 | } | |
1432 | ||
29cc8897 | 1433 | if (ep->fifo_size < usb_endpoint_maxp(desc)) { |
d75379a5 RJ |
1434 | ep_err(ep, "bad maxpacket\n"); |
1435 | return -ERANGE; | |
1436 | } | |
1437 | ||
1438 | udc_usb_ep->pxa_ep = ep; | |
1439 | udc = ep->dev; | |
1440 | ||
1441 | if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) { | |
1442 | ep_err(ep, "bogus device state\n"); | |
1443 | return -ESHUTDOWN; | |
1444 | } | |
1445 | ||
1446 | ep->enabled = 1; | |
1447 | ||
1448 | /* flush fifo (mostly for OUT buffers) */ | |
1449 | pxa_ep_fifo_flush(_ep); | |
1450 | ||
1451 | ep_dbg(ep, "enabled\n"); | |
1452 | return 0; | |
1453 | } | |
1454 | ||
1455 | /** | |
1456 | * pxa_ep_disable - Disable usb endpoint | |
1457 | * @_ep: usb endpoint | |
1458 | * | |
1459 | * Same as for pxa_ep_enable, no physical endpoint configuration can be | |
1460 | * changed. | |
1461 | * Function flushes the endpoint and related requests. | |
1462 | */ | |
1463 | static int pxa_ep_disable(struct usb_ep *_ep) | |
1464 | { | |
1465 | struct pxa_ep *ep; | |
1466 | struct udc_usb_ep *udc_usb_ep; | |
d75379a5 RJ |
1467 | |
1468 | if (!_ep) | |
1469 | return -EINVAL; | |
1470 | ||
1471 | udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep); | |
1472 | ep = udc_usb_ep->pxa_ep; | |
1473 | if (!ep || is_ep0(ep) || !list_empty(&ep->queue)) | |
1474 | return -EINVAL; | |
1475 | ||
d75379a5 RJ |
1476 | ep->enabled = 0; |
1477 | nuke(ep, -ESHUTDOWN); | |
d75379a5 RJ |
1478 | |
1479 | pxa_ep_fifo_flush(_ep); | |
1480 | udc_usb_ep->pxa_ep = NULL; | |
1481 | ||
1482 | ep_dbg(ep, "disabled\n"); | |
1483 | return 0; | |
1484 | } | |
1485 | ||
1486 | static struct usb_ep_ops pxa_ep_ops = { | |
1487 | .enable = pxa_ep_enable, | |
1488 | .disable = pxa_ep_disable, | |
1489 | ||
1490 | .alloc_request = pxa_ep_alloc_request, | |
1491 | .free_request = pxa_ep_free_request, | |
1492 | ||
1493 | .queue = pxa_ep_queue, | |
1494 | .dequeue = pxa_ep_dequeue, | |
1495 | ||
1496 | .set_halt = pxa_ep_set_halt, | |
1497 | .fifo_status = pxa_ep_fifo_status, | |
1498 | .fifo_flush = pxa_ep_fifo_flush, | |
1499 | }; | |
1500 | ||
eb507025 RJ |
1501 | /** |
1502 | * dplus_pullup - Connect or disconnect pullup resistor to D+ pin | |
1503 | * @udc: udc device | |
1504 | * @on: 0 if disconnect pullup resistor, 1 otherwise | |
1505 | * Context: any | |
1506 | * | |
1507 | * Handle D+ pullup resistor, make the device visible to the usb bus, and | |
1508 | * declare it as a full speed usb device | |
1509 | */ | |
1510 | static void dplus_pullup(struct pxa_udc *udc, int on) | |
1511 | { | |
1512 | if (on) { | |
1513 | if (gpio_is_valid(udc->mach->gpio_pullup)) | |
1514 | gpio_set_value(udc->mach->gpio_pullup, | |
1515 | !udc->mach->gpio_pullup_inverted); | |
1516 | if (udc->mach->udc_command) | |
1517 | udc->mach->udc_command(PXA2XX_UDC_CMD_CONNECT); | |
1518 | } else { | |
1519 | if (gpio_is_valid(udc->mach->gpio_pullup)) | |
1520 | gpio_set_value(udc->mach->gpio_pullup, | |
1521 | udc->mach->gpio_pullup_inverted); | |
1522 | if (udc->mach->udc_command) | |
1523 | udc->mach->udc_command(PXA2XX_UDC_CMD_DISCONNECT); | |
1524 | } | |
1525 | udc->pullup_on = on; | |
1526 | } | |
d75379a5 RJ |
1527 | |
1528 | /** | |
1529 | * pxa_udc_get_frame - Returns usb frame number | |
1530 | * @_gadget: usb gadget | |
1531 | */ | |
1532 | static int pxa_udc_get_frame(struct usb_gadget *_gadget) | |
1533 | { | |
1534 | struct pxa_udc *udc = to_gadget_udc(_gadget); | |
1535 | ||
1536 | return (udc_readl(udc, UDCFNR) & 0x7ff); | |
1537 | } | |
1538 | ||
1539 | /** | |
1540 | * pxa_udc_wakeup - Force udc device out of suspend | |
1541 | * @_gadget: usb gadget | |
1542 | * | |
25985edc | 1543 | * Returns 0 if successful, error code otherwise |
d75379a5 RJ |
1544 | */ |
1545 | static int pxa_udc_wakeup(struct usb_gadget *_gadget) | |
1546 | { | |
1547 | struct pxa_udc *udc = to_gadget_udc(_gadget); | |
1548 | ||
1549 | /* host may not have enabled remote wakeup */ | |
1550 | if ((udc_readl(udc, UDCCR) & UDCCR_DWRE) == 0) | |
1551 | return -EHOSTUNREACH; | |
1552 | udc_set_mask_UDCCR(udc, UDCCR_UDR); | |
1553 | return 0; | |
1554 | } | |
1555 | ||
eb507025 RJ |
1556 | static void udc_enable(struct pxa_udc *udc); |
1557 | static void udc_disable(struct pxa_udc *udc); | |
1558 | ||
1559 | /** | |
1560 | * should_enable_udc - Tells if UDC should be enabled | |
1561 | * @udc: udc device | |
1562 | * Context: any | |
1563 | * | |
1564 | * The UDC should be enabled if : | |
b799a7eb | 1565 | |
eb507025 RJ |
1566 | * - the pullup resistor is connected |
1567 | * - and a gadget driver is bound | |
b799a7eb | 1568 | * - and vbus is sensed (or no vbus sense is available) |
eb507025 RJ |
1569 | * |
1570 | * Returns 1 if UDC should be enabled, 0 otherwise | |
1571 | */ | |
1572 | static int should_enable_udc(struct pxa_udc *udc) | |
1573 | { | |
1574 | int put_on; | |
1575 | ||
1576 | put_on = ((udc->pullup_on) && (udc->driver)); | |
ded017ee | 1577 | put_on &= ((udc->vbus_sensed) || (IS_ERR_OR_NULL(udc->transceiver))); |
eb507025 RJ |
1578 | return put_on; |
1579 | } | |
1580 | ||
1581 | /** | |
1582 | * should_disable_udc - Tells if UDC should be disabled | |
1583 | * @udc: udc device | |
1584 | * Context: any | |
1585 | * | |
1586 | * The UDC should be disabled if : | |
1587 | * - the pullup resistor is not connected | |
1588 | * - or no gadget driver is bound | |
b799a7eb | 1589 | * - or no vbus is sensed (when vbus sesing is available) |
eb507025 RJ |
1590 | * |
1591 | * Returns 1 if UDC should be disabled | |
1592 | */ | |
1593 | static int should_disable_udc(struct pxa_udc *udc) | |
1594 | { | |
1595 | int put_off; | |
1596 | ||
1597 | put_off = ((!udc->pullup_on) || (!udc->driver)); | |
ded017ee | 1598 | put_off |= ((!udc->vbus_sensed) && (!IS_ERR_OR_NULL(udc->transceiver))); |
eb507025 RJ |
1599 | return put_off; |
1600 | } | |
1601 | ||
1602 | /** | |
1603 | * pxa_udc_pullup - Offer manual D+ pullup control | |
1604 | * @_gadget: usb gadget using the control | |
1605 | * @is_active: 0 if disconnect, else connect D+ pullup resistor | |
1606 | * Context: !in_interrupt() | |
1607 | * | |
1608 | * Returns 0 if OK, -EOPNOTSUPP if udc driver doesn't handle D+ pullup | |
1609 | */ | |
1610 | static int pxa_udc_pullup(struct usb_gadget *_gadget, int is_active) | |
1611 | { | |
1612 | struct pxa_udc *udc = to_gadget_udc(_gadget); | |
1613 | ||
1614 | if (!gpio_is_valid(udc->mach->gpio_pullup) && !udc->mach->udc_command) | |
1615 | return -EOPNOTSUPP; | |
1616 | ||
1617 | dplus_pullup(udc, is_active); | |
1618 | ||
1619 | if (should_enable_udc(udc)) | |
1620 | udc_enable(udc); | |
1621 | if (should_disable_udc(udc)) | |
1622 | udc_disable(udc); | |
1623 | return 0; | |
1624 | } | |
1625 | ||
b799a7eb RJ |
1626 | static void udc_enable(struct pxa_udc *udc); |
1627 | static void udc_disable(struct pxa_udc *udc); | |
1628 | ||
1629 | /** | |
1630 | * pxa_udc_vbus_session - Called by external transceiver to enable/disable udc | |
1631 | * @_gadget: usb gadget | |
1632 | * @is_active: 0 if should disable the udc, 1 if should enable | |
1633 | * | |
1634 | * Enables the udc, and optionnaly activates D+ pullup resistor. Or disables the | |
1635 | * udc, and deactivates D+ pullup resistor. | |
1636 | * | |
1637 | * Returns 0 | |
1638 | */ | |
1639 | static int pxa_udc_vbus_session(struct usb_gadget *_gadget, int is_active) | |
1640 | { | |
1641 | struct pxa_udc *udc = to_gadget_udc(_gadget); | |
1642 | ||
1643 | udc->vbus_sensed = is_active; | |
1644 | if (should_enable_udc(udc)) | |
1645 | udc_enable(udc); | |
1646 | if (should_disable_udc(udc)) | |
1647 | udc_disable(udc); | |
1648 | ||
1649 | return 0; | |
1650 | } | |
1651 | ||
ee069fb1 RJ |
1652 | /** |
1653 | * pxa_udc_vbus_draw - Called by gadget driver after SET_CONFIGURATION completed | |
1654 | * @_gadget: usb gadget | |
1655 | * @mA: current drawn | |
1656 | * | |
1657 | * Context: !in_interrupt() | |
1658 | * | |
1659 | * Called after a configuration was chosen by a USB host, to inform how much | |
1660 | * current can be drawn by the device from VBus line. | |
1661 | * | |
1662 | * Returns 0 or -EOPNOTSUPP if no transceiver is handling the udc | |
1663 | */ | |
1664 | static int pxa_udc_vbus_draw(struct usb_gadget *_gadget, unsigned mA) | |
1665 | { | |
1666 | struct pxa_udc *udc; | |
1667 | ||
1668 | udc = to_gadget_udc(_gadget); | |
ded017ee | 1669 | if (!IS_ERR_OR_NULL(udc->transceiver)) |
b96d3b08 | 1670 | return usb_phy_set_power(udc->transceiver, mA); |
ee069fb1 RJ |
1671 | return -EOPNOTSUPP; |
1672 | } | |
1673 | ||
70189a63 FB |
1674 | static int pxa27x_udc_start(struct usb_gadget *g, |
1675 | struct usb_gadget_driver *driver); | |
1676 | static int pxa27x_udc_stop(struct usb_gadget *g, | |
1677 | struct usb_gadget_driver *driver); | |
0f91349b | 1678 | |
d75379a5 RJ |
1679 | static const struct usb_gadget_ops pxa_udc_ops = { |
1680 | .get_frame = pxa_udc_get_frame, | |
1681 | .wakeup = pxa_udc_wakeup, | |
eb507025 | 1682 | .pullup = pxa_udc_pullup, |
b799a7eb | 1683 | .vbus_session = pxa_udc_vbus_session, |
ee069fb1 | 1684 | .vbus_draw = pxa_udc_vbus_draw, |
70189a63 FB |
1685 | .udc_start = pxa27x_udc_start, |
1686 | .udc_stop = pxa27x_udc_stop, | |
d75379a5 RJ |
1687 | }; |
1688 | ||
1689 | /** | |
1690 | * udc_disable - disable udc device controller | |
1691 | * @udc: udc device | |
eb507025 | 1692 | * Context: any |
d75379a5 RJ |
1693 | * |
1694 | * Disables the udc device : disables clocks, udc interrupts, control endpoint | |
1695 | * interrupts. | |
1696 | */ | |
1697 | static void udc_disable(struct pxa_udc *udc) | |
1698 | { | |
eb507025 RJ |
1699 | if (!udc->enabled) |
1700 | return; | |
1701 | ||
d75379a5 RJ |
1702 | udc_writel(udc, UDCICR0, 0); |
1703 | udc_writel(udc, UDCICR1, 0); | |
1704 | ||
1705 | udc_clear_mask_UDCCR(udc, UDCCR_UDE); | |
1706 | clk_disable(udc->clk); | |
1707 | ||
1708 | ep0_idle(udc); | |
1709 | udc->gadget.speed = USB_SPEED_UNKNOWN; | |
eb507025 RJ |
1710 | |
1711 | udc->enabled = 0; | |
d75379a5 RJ |
1712 | } |
1713 | ||
1714 | /** | |
1715 | * udc_init_data - Initialize udc device data structures | |
1716 | * @dev: udc device | |
1717 | * | |
1718 | * Initializes gadget endpoint list, endpoints locks. No action is taken | |
1719 | * on the hardware. | |
1720 | */ | |
1721 | static __init void udc_init_data(struct pxa_udc *dev) | |
1722 | { | |
1723 | int i; | |
1724 | struct pxa_ep *ep; | |
1725 | ||
1726 | /* device/ep0 records init */ | |
1727 | INIT_LIST_HEAD(&dev->gadget.ep_list); | |
1728 | INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); | |
1729 | dev->udc_usb_ep[0].pxa_ep = &dev->pxa_ep[0]; | |
1730 | ep0_idle(dev); | |
d75379a5 RJ |
1731 | |
1732 | /* PXA endpoints init */ | |
1733 | for (i = 0; i < NR_PXA_ENDPOINTS; i++) { | |
1734 | ep = &dev->pxa_ep[i]; | |
1735 | ||
1736 | ep->enabled = is_ep0(ep); | |
1737 | INIT_LIST_HEAD(&ep->queue); | |
1738 | spin_lock_init(&ep->lock); | |
1739 | } | |
1740 | ||
1741 | /* USB endpoints init */ | |
4c24b6d0 VS |
1742 | for (i = 1; i < NR_USB_ENDPOINTS; i++) |
1743 | list_add_tail(&dev->udc_usb_ep[i].usb_ep.ep_list, | |
1744 | &dev->gadget.ep_list); | |
d75379a5 RJ |
1745 | } |
1746 | ||
1747 | /** | |
1748 | * udc_enable - Enables the udc device | |
1749 | * @dev: udc device | |
1750 | * | |
1751 | * Enables the udc device : enables clocks, udc interrupts, control endpoint | |
1752 | * interrupts, sets usb as UDC client and setups endpoints. | |
1753 | */ | |
1754 | static void udc_enable(struct pxa_udc *udc) | |
1755 | { | |
eb507025 RJ |
1756 | if (udc->enabled) |
1757 | return; | |
1758 | ||
d75379a5 RJ |
1759 | udc_writel(udc, UDCICR0, 0); |
1760 | udc_writel(udc, UDCICR1, 0); | |
d75379a5 RJ |
1761 | udc_clear_mask_UDCCR(udc, UDCCR_UDE); |
1762 | ||
1763 | clk_enable(udc->clk); | |
1764 | ||
1765 | ep0_idle(udc); | |
1766 | udc->gadget.speed = USB_SPEED_FULL; | |
1767 | memset(&udc->stats, 0, sizeof(udc->stats)); | |
1768 | ||
1769 | udc_set_mask_UDCCR(udc, UDCCR_UDE); | |
367815ee | 1770 | ep_write_UDCCSR(&udc->pxa_ep[0], UDCCSR0_ACM); |
d75379a5 RJ |
1771 | udelay(2); |
1772 | if (udc_readl(udc, UDCCR) & UDCCR_EMCE) | |
1773 | dev_err(udc->dev, "Configuration errors, udc disabled\n"); | |
1774 | ||
1775 | /* | |
1776 | * Caller must be able to sleep in order to cope with startup transients | |
1777 | */ | |
1778 | msleep(100); | |
1779 | ||
1780 | /* enable suspend/resume and reset irqs */ | |
1781 | udc_writel(udc, UDCICR1, | |
1782 | UDCICR1_IECC | UDCICR1_IERU | |
1783 | | UDCICR1_IESU | UDCICR1_IERS); | |
1784 | ||
1785 | /* enable ep0 irqs */ | |
1786 | pio_irq_enable(&udc->pxa_ep[0]); | |
1787 | ||
eb507025 | 1788 | udc->enabled = 1; |
d75379a5 RJ |
1789 | } |
1790 | ||
1791 | /** | |
0f91349b | 1792 | * pxa27x_start - Register gadget driver |
d75379a5 | 1793 | * @driver: gadget driver |
b0fca50f | 1794 | * @bind: bind function |
d75379a5 RJ |
1795 | * |
1796 | * When a driver is successfully registered, it will receive control requests | |
1797 | * including set_configuration(), which enables non-control requests. Then | |
1798 | * usb traffic follows until a disconnect is reported. Then a host may connect | |
1799 | * again, or the driver might get unbound. | |
1800 | * | |
eb507025 RJ |
1801 | * Note that the udc is not automatically enabled. Check function |
1802 | * should_enable_udc(). | |
1803 | * | |
d75379a5 RJ |
1804 | * Returns 0 if no error, -EINVAL, -ENODEV, -EBUSY otherwise |
1805 | */ | |
70189a63 FB |
1806 | static int pxa27x_udc_start(struct usb_gadget *g, |
1807 | struct usb_gadget_driver *driver) | |
d75379a5 | 1808 | { |
70189a63 | 1809 | struct pxa_udc *udc = to_pxa(g); |
d75379a5 RJ |
1810 | int retval; |
1811 | ||
d75379a5 RJ |
1812 | /* first hook up the driver ... */ |
1813 | udc->driver = driver; | |
1814 | udc->gadget.dev.driver = &driver->driver; | |
eb507025 | 1815 | dplus_pullup(udc, 1); |
d75379a5 RJ |
1816 | |
1817 | retval = device_add(&udc->gadget.dev); | |
1818 | if (retval) { | |
1819 | dev_err(udc->dev, "device_add error %d\n", retval); | |
70189a63 | 1820 | goto fail; |
d75379a5 | 1821 | } |
ded017ee | 1822 | if (!IS_ERR_OR_NULL(udc->transceiver)) { |
6e13c650 HK |
1823 | retval = otg_set_peripheral(udc->transceiver->otg, |
1824 | &udc->gadget); | |
7fec3c25 RJ |
1825 | if (retval) { |
1826 | dev_err(udc->dev, "can't bind to transceiver\n"); | |
70189a63 | 1827 | goto fail; |
7fec3c25 RJ |
1828 | } |
1829 | } | |
1830 | ||
eb507025 RJ |
1831 | if (should_enable_udc(udc)) |
1832 | udc_enable(udc); | |
d75379a5 RJ |
1833 | return 0; |
1834 | ||
70189a63 | 1835 | fail: |
d75379a5 RJ |
1836 | udc->driver = NULL; |
1837 | udc->gadget.dev.driver = NULL; | |
1838 | return retval; | |
1839 | } | |
d75379a5 RJ |
1840 | |
1841 | /** | |
1842 | * stop_activity - Stops udc endpoints | |
1843 | * @udc: udc device | |
1844 | * @driver: gadget driver | |
1845 | * | |
1846 | * Disables all udc endpoints (even control endpoint), report disconnect to | |
1847 | * the gadget user. | |
1848 | */ | |
1849 | static void stop_activity(struct pxa_udc *udc, struct usb_gadget_driver *driver) | |
1850 | { | |
1851 | int i; | |
1852 | ||
1853 | /* don't disconnect drivers more than once */ | |
1854 | if (udc->gadget.speed == USB_SPEED_UNKNOWN) | |
1855 | driver = NULL; | |
1856 | udc->gadget.speed = USB_SPEED_UNKNOWN; | |
1857 | ||
1858 | for (i = 0; i < NR_USB_ENDPOINTS; i++) | |
1859 | pxa_ep_disable(&udc->udc_usb_ep[i].usb_ep); | |
d75379a5 RJ |
1860 | } |
1861 | ||
1862 | /** | |
0f91349b | 1863 | * pxa27x_udc_stop - Unregister the gadget driver |
d75379a5 RJ |
1864 | * @driver: gadget driver |
1865 | * | |
1866 | * Returns 0 if no error, -ENODEV, -EINVAL otherwise | |
1867 | */ | |
70189a63 FB |
1868 | static int pxa27x_udc_stop(struct usb_gadget *g, |
1869 | struct usb_gadget_driver *driver) | |
d75379a5 | 1870 | { |
70189a63 | 1871 | struct pxa_udc *udc = to_pxa(g); |
d75379a5 RJ |
1872 | |
1873 | stop_activity(udc, driver); | |
1874 | udc_disable(udc); | |
eb507025 | 1875 | dplus_pullup(udc, 0); |
d75379a5 | 1876 | |
d75379a5 RJ |
1877 | udc->driver = NULL; |
1878 | ||
1879 | device_del(&udc->gadget.dev); | |
7fec3c25 | 1880 | |
ded017ee | 1881 | if (!IS_ERR_OR_NULL(udc->transceiver)) |
6e13c650 | 1882 | return otg_set_peripheral(udc->transceiver->otg, NULL); |
d75379a5 RJ |
1883 | return 0; |
1884 | } | |
d75379a5 RJ |
1885 | |
1886 | /** | |
1887 | * handle_ep0_ctrl_req - handle control endpoint control request | |
1888 | * @udc: udc device | |
1889 | * @req: control request | |
1890 | */ | |
1891 | static void handle_ep0_ctrl_req(struct pxa_udc *udc, | |
1892 | struct pxa27x_request *req) | |
1893 | { | |
1894 | struct pxa_ep *ep = &udc->pxa_ep[0]; | |
1895 | union { | |
1896 | struct usb_ctrlrequest r; | |
1897 | u32 word[2]; | |
1898 | } u; | |
1899 | int i; | |
1900 | int have_extrabytes = 0; | |
5e23e90f | 1901 | unsigned long flags; |
d75379a5 RJ |
1902 | |
1903 | nuke(ep, -EPROTO); | |
5e23e90f | 1904 | spin_lock_irqsave(&ep->lock, flags); |
d75379a5 | 1905 | |
9f5351b7 RJ |
1906 | /* |
1907 | * In the PXA320 manual, in the section about Back-to-Back setup | |
1908 | * packets, it describes this situation. The solution is to set OPC to | |
1909 | * get rid of the status packet, and then continue with the setup | |
1910 | * packet. Generalize to pxa27x CPUs. | |
1911 | */ | |
1912 | if (epout_has_pkt(ep) && (ep_count_bytes_remain(ep) == 0)) | |
367815ee | 1913 | ep_write_UDCCSR(ep, UDCCSR0_OPC); |
9f5351b7 | 1914 | |
d75379a5 RJ |
1915 | /* read SETUP packet */ |
1916 | for (i = 0; i < 2; i++) { | |
1917 | if (unlikely(ep_is_empty(ep))) | |
1918 | goto stall; | |
1919 | u.word[i] = udc_ep_readl(ep, UDCDR); | |
1920 | } | |
1921 | ||
1922 | have_extrabytes = !ep_is_empty(ep); | |
1923 | while (!ep_is_empty(ep)) { | |
1924 | i = udc_ep_readl(ep, UDCDR); | |
1925 | ep_err(ep, "wrong to have extra bytes for setup : 0x%08x\n", i); | |
1926 | } | |
1927 | ||
d75379a5 RJ |
1928 | ep_dbg(ep, "SETUP %02x.%02x v%04x i%04x l%04x\n", |
1929 | u.r.bRequestType, u.r.bRequest, | |
5a59bc54 RJ |
1930 | le16_to_cpu(u.r.wValue), le16_to_cpu(u.r.wIndex), |
1931 | le16_to_cpu(u.r.wLength)); | |
d75379a5 RJ |
1932 | if (unlikely(have_extrabytes)) |
1933 | goto stall; | |
1934 | ||
1935 | if (u.r.bRequestType & USB_DIR_IN) | |
1936 | set_ep0state(udc, IN_DATA_STAGE); | |
1937 | else | |
1938 | set_ep0state(udc, OUT_DATA_STAGE); | |
1939 | ||
1940 | /* Tell UDC to enter Data Stage */ | |
367815ee | 1941 | ep_write_UDCCSR(ep, UDCCSR0_SA | UDCCSR0_OPC); |
d75379a5 | 1942 | |
5e23e90f | 1943 | spin_unlock_irqrestore(&ep->lock, flags); |
d75379a5 | 1944 | i = udc->driver->setup(&udc->gadget, &u.r); |
5e23e90f | 1945 | spin_lock_irqsave(&ep->lock, flags); |
d75379a5 RJ |
1946 | if (i < 0) |
1947 | goto stall; | |
1948 | out: | |
5e23e90f | 1949 | spin_unlock_irqrestore(&ep->lock, flags); |
d75379a5 RJ |
1950 | return; |
1951 | stall: | |
1952 | ep_dbg(ep, "protocol STALL, udccsr0=%03x err %d\n", | |
1953 | udc_ep_readl(ep, UDCCSR), i); | |
367815ee | 1954 | ep_write_UDCCSR(ep, UDCCSR0_FST | UDCCSR0_FTF); |
d75379a5 RJ |
1955 | set_ep0state(udc, STALL); |
1956 | goto out; | |
1957 | } | |
1958 | ||
1959 | /** | |
1960 | * handle_ep0 - Handle control endpoint data transfers | |
1961 | * @udc: udc device | |
1962 | * @fifo_irq: 1 if triggered by fifo service type irq | |
1963 | * @opc_irq: 1 if triggered by output packet complete type irq | |
1964 | * | |
1965 | * Context : when in_interrupt() or with ep->lock held | |
1966 | * | |
1967 | * Tries to transfer all pending request data into the endpoint and/or | |
1968 | * transfer all pending data in the endpoint into usb requests. | |
1969 | * Handles states of ep0 automata. | |
1970 | * | |
1971 | * PXA27x hardware handles several standard usb control requests without | |
1972 | * driver notification. The requests fully handled by hardware are : | |
1973 | * SET_ADDRESS, SET_FEATURE, CLEAR_FEATURE, GET_CONFIGURATION, GET_INTERFACE, | |
1974 | * GET_STATUS | |
1975 | * The requests handled by hardware, but with irq notification are : | |
1976 | * SYNCH_FRAME, SET_CONFIGURATION, SET_INTERFACE | |
1977 | * The remaining standard requests really handled by handle_ep0 are : | |
1978 | * GET_DESCRIPTOR, SET_DESCRIPTOR, specific requests. | |
1979 | * Requests standardized outside of USB 2.0 chapter 9 are handled more | |
1980 | * uniformly, by gadget drivers. | |
1981 | * | |
1982 | * The control endpoint state machine is _not_ USB spec compliant, it's even | |
1983 | * hardly compliant with Intel PXA270 developers guide. | |
1984 | * The key points which inferred this state machine are : | |
1985 | * - on every setup token, bit UDCCSR0_SA is raised and held until cleared by | |
1986 | * software. | |
1987 | * - on every OUT packet received, UDCCSR0_OPC is raised and held until | |
1988 | * cleared by software. | |
1989 | * - clearing UDCCSR0_OPC always flushes ep0. If in setup stage, never do it | |
1990 | * before reading ep0. | |
9f5351b7 RJ |
1991 | * This is true only for PXA27x. This is not true anymore for PXA3xx family |
1992 | * (check Back-to-Back setup packet in developers guide). | |
d75379a5 RJ |
1993 | * - irq can be called on a "packet complete" event (opc_irq=1), while |
1994 | * UDCCSR0_OPC is not yet raised (delta can be as big as 100ms | |
1995 | * from experimentation). | |
1996 | * - as UDCCSR0_SA can be activated while in irq handling, and clearing | |
1997 | * UDCCSR0_OPC would flush the setup data, we almost never clear UDCCSR0_OPC | |
1998 | * => we never actually read the "status stage" packet of an IN data stage | |
1999 | * => this is not documented in Intel documentation | |
2000 | * - hardware as no idea of STATUS STAGE, it only handle SETUP STAGE and DATA | |
2001 | * STAGE. The driver add STATUS STAGE to send last zero length packet in | |
2002 | * OUT_STATUS_STAGE. | |
2003 | * - special attention was needed for IN_STATUS_STAGE. If a packet complete | |
2004 | * event is detected, we terminate the status stage without ackowledging the | |
2005 | * packet (not to risk to loose a potential SETUP packet) | |
2006 | */ | |
2007 | static void handle_ep0(struct pxa_udc *udc, int fifo_irq, int opc_irq) | |
2008 | { | |
2009 | u32 udccsr0; | |
2010 | struct pxa_ep *ep = &udc->pxa_ep[0]; | |
2011 | struct pxa27x_request *req = NULL; | |
2012 | int completed = 0; | |
2013 | ||
4c24b6d0 VS |
2014 | if (!list_empty(&ep->queue)) |
2015 | req = list_entry(ep->queue.next, struct pxa27x_request, queue); | |
2016 | ||
d75379a5 RJ |
2017 | udccsr0 = udc_ep_readl(ep, UDCCSR); |
2018 | ep_dbg(ep, "state=%s, req=%p, udccsr0=0x%03x, udcbcr=%d, irq_msk=%x\n", | |
2019 | EP0_STNAME(udc), req, udccsr0, udc_ep_readl(ep, UDCBCR), | |
2020 | (fifo_irq << 1 | opc_irq)); | |
2021 | ||
d75379a5 RJ |
2022 | if (udccsr0 & UDCCSR0_SST) { |
2023 | ep_dbg(ep, "clearing stall status\n"); | |
2024 | nuke(ep, -EPIPE); | |
367815ee | 2025 | ep_write_UDCCSR(ep, UDCCSR0_SST); |
d75379a5 RJ |
2026 | ep0_idle(udc); |
2027 | } | |
2028 | ||
2029 | if (udccsr0 & UDCCSR0_SA) { | |
2030 | nuke(ep, 0); | |
2031 | set_ep0state(udc, SETUP_STAGE); | |
2032 | } | |
2033 | ||
2034 | switch (udc->ep0state) { | |
2035 | case WAIT_FOR_SETUP: | |
2036 | /* | |
2037 | * Hardware bug : beware, we cannot clear OPC, since we would | |
2038 | * miss a potential OPC irq for a setup packet. | |
2039 | * So, we only do ... nothing, and hope for a next irq with | |
2040 | * UDCCSR0_SA set. | |
2041 | */ | |
2042 | break; | |
2043 | case SETUP_STAGE: | |
2044 | udccsr0 &= UDCCSR0_CTRL_REQ_MASK; | |
2045 | if (likely(udccsr0 == UDCCSR0_CTRL_REQ_MASK)) | |
2046 | handle_ep0_ctrl_req(udc, req); | |
2047 | break; | |
2048 | case IN_DATA_STAGE: /* GET_DESCRIPTOR */ | |
2049 | if (epout_has_pkt(ep)) | |
367815ee | 2050 | ep_write_UDCCSR(ep, UDCCSR0_OPC); |
d75379a5 RJ |
2051 | if (req && !ep_is_full(ep)) |
2052 | completed = write_ep0_fifo(ep, req); | |
2053 | if (completed) | |
5e23e90f | 2054 | ep0_end_in_req(ep, req, NULL); |
d75379a5 RJ |
2055 | break; |
2056 | case OUT_DATA_STAGE: /* SET_DESCRIPTOR */ | |
2057 | if (epout_has_pkt(ep) && req) | |
2058 | completed = read_ep0_fifo(ep, req); | |
2059 | if (completed) | |
5e23e90f | 2060 | ep0_end_out_req(ep, req, NULL); |
d75379a5 RJ |
2061 | break; |
2062 | case STALL: | |
367815ee | 2063 | ep_write_UDCCSR(ep, UDCCSR0_FST); |
d75379a5 RJ |
2064 | break; |
2065 | case IN_STATUS_STAGE: | |
2066 | /* | |
2067 | * Hardware bug : beware, we cannot clear OPC, since we would | |
2068 | * miss a potential PC irq for a setup packet. | |
2069 | * So, we only put the ep0 into WAIT_FOR_SETUP state. | |
2070 | */ | |
2071 | if (opc_irq) | |
2072 | ep0_idle(udc); | |
2073 | break; | |
2074 | case OUT_STATUS_STAGE: | |
2075 | case WAIT_ACK_SET_CONF_INTERF: | |
2076 | ep_warn(ep, "should never get in %s state here!!!\n", | |
2077 | EP0_STNAME(ep->dev)); | |
2078 | ep0_idle(udc); | |
2079 | break; | |
2080 | } | |
2081 | } | |
2082 | ||
2083 | /** | |
2084 | * handle_ep - Handle endpoint data tranfers | |
2085 | * @ep: pxa physical endpoint | |
2086 | * | |
2087 | * Tries to transfer all pending request data into the endpoint and/or | |
2088 | * transfer all pending data in the endpoint into usb requests. | |
2089 | * | |
5e23e90f | 2090 | * Is always called when in_interrupt() and with ep->lock released. |
d75379a5 RJ |
2091 | */ |
2092 | static void handle_ep(struct pxa_ep *ep) | |
2093 | { | |
2094 | struct pxa27x_request *req; | |
2095 | int completed; | |
2096 | u32 udccsr; | |
2097 | int is_in = ep->dir_in; | |
2098 | int loop = 0; | |
5e23e90f RJ |
2099 | unsigned long flags; |
2100 | ||
2101 | spin_lock_irqsave(&ep->lock, flags); | |
2102 | if (ep->in_handle_ep) | |
2103 | goto recursion_detected; | |
2104 | ep->in_handle_ep = 1; | |
d75379a5 RJ |
2105 | |
2106 | do { | |
2107 | completed = 0; | |
2108 | udccsr = udc_ep_readl(ep, UDCCSR); | |
5e23e90f | 2109 | |
d75379a5 RJ |
2110 | if (likely(!list_empty(&ep->queue))) |
2111 | req = list_entry(ep->queue.next, | |
2112 | struct pxa27x_request, queue); | |
2113 | else | |
2114 | req = NULL; | |
2115 | ||
2116 | ep_dbg(ep, "req:%p, udccsr 0x%03x loop=%d\n", | |
2117 | req, udccsr, loop++); | |
2118 | ||
2119 | if (unlikely(udccsr & (UDCCSR_SST | UDCCSR_TRN))) | |
2120 | udc_ep_writel(ep, UDCCSR, | |
2121 | udccsr & (UDCCSR_SST | UDCCSR_TRN)); | |
2122 | if (!req) | |
2123 | break; | |
2124 | ||
2125 | if (unlikely(is_in)) { | |
2126 | if (likely(!ep_is_full(ep))) | |
2127 | completed = write_fifo(ep, req); | |
d75379a5 RJ |
2128 | } else { |
2129 | if (likely(epout_has_pkt(ep))) | |
2130 | completed = read_fifo(ep, req); | |
5e23e90f RJ |
2131 | } |
2132 | ||
2133 | if (completed) { | |
2134 | if (is_in) | |
2135 | ep_end_in_req(ep, req, &flags); | |
2136 | else | |
2137 | ep_end_out_req(ep, req, &flags); | |
d75379a5 RJ |
2138 | } |
2139 | } while (completed); | |
5e23e90f RJ |
2140 | |
2141 | ep->in_handle_ep = 0; | |
2142 | recursion_detected: | |
2143 | spin_unlock_irqrestore(&ep->lock, flags); | |
d75379a5 RJ |
2144 | } |
2145 | ||
2146 | /** | |
2147 | * pxa27x_change_configuration - Handle SET_CONF usb request notification | |
2148 | * @udc: udc device | |
2149 | * @config: usb configuration | |
2150 | * | |
2151 | * Post the request to upper level. | |
2152 | * Don't use any pxa specific harware configuration capabilities | |
2153 | */ | |
2154 | static void pxa27x_change_configuration(struct pxa_udc *udc, int config) | |
2155 | { | |
2156 | struct usb_ctrlrequest req ; | |
2157 | ||
2158 | dev_dbg(udc->dev, "config=%d\n", config); | |
2159 | ||
2160 | udc->config = config; | |
2161 | udc->last_interface = 0; | |
2162 | udc->last_alternate = 0; | |
2163 | ||
2164 | req.bRequestType = 0; | |
2165 | req.bRequest = USB_REQ_SET_CONFIGURATION; | |
2166 | req.wValue = config; | |
2167 | req.wIndex = 0; | |
2168 | req.wLength = 0; | |
2169 | ||
2170 | set_ep0state(udc, WAIT_ACK_SET_CONF_INTERF); | |
2171 | udc->driver->setup(&udc->gadget, &req); | |
367815ee | 2172 | ep_write_UDCCSR(&udc->pxa_ep[0], UDCCSR0_AREN); |
d75379a5 RJ |
2173 | } |
2174 | ||
2175 | /** | |
2176 | * pxa27x_change_interface - Handle SET_INTERF usb request notification | |
2177 | * @udc: udc device | |
2178 | * @iface: interface number | |
2179 | * @alt: alternate setting number | |
2180 | * | |
2181 | * Post the request to upper level. | |
2182 | * Don't use any pxa specific harware configuration capabilities | |
2183 | */ | |
2184 | static void pxa27x_change_interface(struct pxa_udc *udc, int iface, int alt) | |
2185 | { | |
2186 | struct usb_ctrlrequest req; | |
2187 | ||
2188 | dev_dbg(udc->dev, "interface=%d, alternate setting=%d\n", iface, alt); | |
2189 | ||
2190 | udc->last_interface = iface; | |
2191 | udc->last_alternate = alt; | |
2192 | ||
2193 | req.bRequestType = USB_RECIP_INTERFACE; | |
2194 | req.bRequest = USB_REQ_SET_INTERFACE; | |
2195 | req.wValue = alt; | |
2196 | req.wIndex = iface; | |
2197 | req.wLength = 0; | |
2198 | ||
2199 | set_ep0state(udc, WAIT_ACK_SET_CONF_INTERF); | |
2200 | udc->driver->setup(&udc->gadget, &req); | |
367815ee | 2201 | ep_write_UDCCSR(&udc->pxa_ep[0], UDCCSR0_AREN); |
d75379a5 RJ |
2202 | } |
2203 | ||
2204 | /* | |
2205 | * irq_handle_data - Handle data transfer | |
2206 | * @irq: irq IRQ number | |
2207 | * @udc: dev pxa_udc device structure | |
2208 | * | |
2209 | * Called from irq handler, transferts data to or from endpoint to queue | |
2210 | */ | |
2211 | static void irq_handle_data(int irq, struct pxa_udc *udc) | |
2212 | { | |
2213 | int i; | |
2214 | struct pxa_ep *ep; | |
2215 | u32 udcisr0 = udc_readl(udc, UDCISR0) & UDCCISR0_EP_MASK; | |
2216 | u32 udcisr1 = udc_readl(udc, UDCISR1) & UDCCISR1_EP_MASK; | |
2217 | ||
2218 | if (udcisr0 & UDCISR_INT_MASK) { | |
2219 | udc->pxa_ep[0].stats.irqs++; | |
2220 | udc_writel(udc, UDCISR0, UDCISR_INT(0, UDCISR_INT_MASK)); | |
2221 | handle_ep0(udc, !!(udcisr0 & UDCICR_FIFOERR), | |
2222 | !!(udcisr0 & UDCICR_PKTCOMPL)); | |
2223 | } | |
2224 | ||
2225 | udcisr0 >>= 2; | |
2226 | for (i = 1; udcisr0 != 0 && i < 16; udcisr0 >>= 2, i++) { | |
2227 | if (!(udcisr0 & UDCISR_INT_MASK)) | |
2228 | continue; | |
2229 | ||
2230 | udc_writel(udc, UDCISR0, UDCISR_INT(i, UDCISR_INT_MASK)); | |
4fdb31d9 ES |
2231 | |
2232 | WARN_ON(i >= ARRAY_SIZE(udc->pxa_ep)); | |
2233 | if (i < ARRAY_SIZE(udc->pxa_ep)) { | |
2234 | ep = &udc->pxa_ep[i]; | |
2235 | ep->stats.irqs++; | |
2236 | handle_ep(ep); | |
2237 | } | |
d75379a5 RJ |
2238 | } |
2239 | ||
2240 | for (i = 16; udcisr1 != 0 && i < 24; udcisr1 >>= 2, i++) { | |
2241 | udc_writel(udc, UDCISR1, UDCISR_INT(i - 16, UDCISR_INT_MASK)); | |
2242 | if (!(udcisr1 & UDCISR_INT_MASK)) | |
2243 | continue; | |
2244 | ||
4fdb31d9 ES |
2245 | WARN_ON(i >= ARRAY_SIZE(udc->pxa_ep)); |
2246 | if (i < ARRAY_SIZE(udc->pxa_ep)) { | |
2247 | ep = &udc->pxa_ep[i]; | |
2248 | ep->stats.irqs++; | |
2249 | handle_ep(ep); | |
2250 | } | |
d75379a5 RJ |
2251 | } |
2252 | ||
2253 | } | |
2254 | ||
2255 | /** | |
2256 | * irq_udc_suspend - Handle IRQ "UDC Suspend" | |
2257 | * @udc: udc device | |
2258 | */ | |
2259 | static void irq_udc_suspend(struct pxa_udc *udc) | |
2260 | { | |
2261 | udc_writel(udc, UDCISR1, UDCISR1_IRSU); | |
2262 | udc->stats.irqs_suspend++; | |
2263 | ||
2264 | if (udc->gadget.speed != USB_SPEED_UNKNOWN | |
2265 | && udc->driver && udc->driver->suspend) | |
2266 | udc->driver->suspend(&udc->gadget); | |
2267 | ep0_idle(udc); | |
2268 | } | |
2269 | ||
2270 | /** | |
2271 | * irq_udc_resume - Handle IRQ "UDC Resume" | |
2272 | * @udc: udc device | |
2273 | */ | |
2274 | static void irq_udc_resume(struct pxa_udc *udc) | |
2275 | { | |
2276 | udc_writel(udc, UDCISR1, UDCISR1_IRRU); | |
2277 | udc->stats.irqs_resume++; | |
2278 | ||
2279 | if (udc->gadget.speed != USB_SPEED_UNKNOWN | |
2280 | && udc->driver && udc->driver->resume) | |
2281 | udc->driver->resume(&udc->gadget); | |
2282 | } | |
2283 | ||
2284 | /** | |
2285 | * irq_udc_reconfig - Handle IRQ "UDC Change Configuration" | |
2286 | * @udc: udc device | |
2287 | */ | |
2288 | static void irq_udc_reconfig(struct pxa_udc *udc) | |
2289 | { | |
2290 | unsigned config, interface, alternate, config_change; | |
2291 | u32 udccr = udc_readl(udc, UDCCR); | |
2292 | ||
2293 | udc_writel(udc, UDCISR1, UDCISR1_IRCC); | |
2294 | udc->stats.irqs_reconfig++; | |
2295 | ||
2296 | config = (udccr & UDCCR_ACN) >> UDCCR_ACN_S; | |
2297 | config_change = (config != udc->config); | |
2298 | pxa27x_change_configuration(udc, config); | |
2299 | ||
2300 | interface = (udccr & UDCCR_AIN) >> UDCCR_AIN_S; | |
2301 | alternate = (udccr & UDCCR_AAISN) >> UDCCR_AAISN_S; | |
2302 | pxa27x_change_interface(udc, interface, alternate); | |
2303 | ||
2304 | if (config_change) | |
2305 | update_pxa_ep_matches(udc); | |
2306 | udc_set_mask_UDCCR(udc, UDCCR_SMAC); | |
2307 | } | |
2308 | ||
2309 | /** | |
2310 | * irq_udc_reset - Handle IRQ "UDC Reset" | |
2311 | * @udc: udc device | |
2312 | */ | |
2313 | static void irq_udc_reset(struct pxa_udc *udc) | |
2314 | { | |
2315 | u32 udccr = udc_readl(udc, UDCCR); | |
2316 | struct pxa_ep *ep = &udc->pxa_ep[0]; | |
2317 | ||
2318 | dev_info(udc->dev, "USB reset\n"); | |
2319 | udc_writel(udc, UDCISR1, UDCISR1_IRRS); | |
2320 | udc->stats.irqs_reset++; | |
2321 | ||
2322 | if ((udccr & UDCCR_UDA) == 0) { | |
2323 | dev_dbg(udc->dev, "USB reset start\n"); | |
2324 | stop_activity(udc, udc->driver); | |
2325 | } | |
2326 | udc->gadget.speed = USB_SPEED_FULL; | |
2327 | memset(&udc->stats, 0, sizeof udc->stats); | |
2328 | ||
2329 | nuke(ep, -EPROTO); | |
367815ee | 2330 | ep_write_UDCCSR(ep, UDCCSR0_FTF | UDCCSR0_OPC); |
d75379a5 RJ |
2331 | ep0_idle(udc); |
2332 | } | |
2333 | ||
2334 | /** | |
2335 | * pxa_udc_irq - Main irq handler | |
2336 | * @irq: irq number | |
2337 | * @_dev: udc device | |
2338 | * | |
2339 | * Handles all udc interrupts | |
2340 | */ | |
2341 | static irqreturn_t pxa_udc_irq(int irq, void *_dev) | |
2342 | { | |
2343 | struct pxa_udc *udc = _dev; | |
2344 | u32 udcisr0 = udc_readl(udc, UDCISR0); | |
2345 | u32 udcisr1 = udc_readl(udc, UDCISR1); | |
2346 | u32 udccr = udc_readl(udc, UDCCR); | |
2347 | u32 udcisr1_spec; | |
2348 | ||
2349 | dev_vdbg(udc->dev, "Interrupt, UDCISR0:0x%08x, UDCISR1:0x%08x, " | |
2350 | "UDCCR:0x%08x\n", udcisr0, udcisr1, udccr); | |
2351 | ||
2352 | udcisr1_spec = udcisr1 & 0xf8000000; | |
2353 | if (unlikely(udcisr1_spec & UDCISR1_IRSU)) | |
2354 | irq_udc_suspend(udc); | |
2355 | if (unlikely(udcisr1_spec & UDCISR1_IRRU)) | |
2356 | irq_udc_resume(udc); | |
2357 | if (unlikely(udcisr1_spec & UDCISR1_IRCC)) | |
2358 | irq_udc_reconfig(udc); | |
2359 | if (unlikely(udcisr1_spec & UDCISR1_IRRS)) | |
2360 | irq_udc_reset(udc); | |
2361 | ||
2362 | if ((udcisr0 & UDCCISR0_EP_MASK) | (udcisr1 & UDCCISR1_EP_MASK)) | |
2363 | irq_handle_data(irq, udc); | |
2364 | ||
2365 | return IRQ_HANDLED; | |
2366 | } | |
2367 | ||
2368 | static struct pxa_udc memory = { | |
2369 | .gadget = { | |
2370 | .ops = &pxa_udc_ops, | |
2371 | .ep0 = &memory.udc_usb_ep[0].usb_ep, | |
2372 | .name = driver_name, | |
2373 | .dev = { | |
c682b170 | 2374 | .init_name = "gadget", |
d75379a5 RJ |
2375 | }, |
2376 | }, | |
2377 | ||
2378 | .udc_usb_ep = { | |
2379 | USB_EP_CTRL, | |
2380 | USB_EP_OUT_BULK(1), | |
2381 | USB_EP_IN_BULK(2), | |
2382 | USB_EP_IN_ISO(3), | |
2383 | USB_EP_OUT_ISO(4), | |
2384 | USB_EP_IN_INT(5), | |
2385 | }, | |
2386 | ||
2387 | .pxa_ep = { | |
2388 | PXA_EP_CTRL, | |
2389 | /* Endpoints for gadget zero */ | |
2390 | PXA_EP_OUT_BULK(1, 1, 3, 0, 0), | |
2391 | PXA_EP_IN_BULK(2, 2, 3, 0, 0), | |
2392 | /* Endpoints for ether gadget, file storage gadget */ | |
2393 | PXA_EP_OUT_BULK(3, 1, 1, 0, 0), | |
2394 | PXA_EP_IN_BULK(4, 2, 1, 0, 0), | |
2395 | PXA_EP_IN_ISO(5, 3, 1, 0, 0), | |
2396 | PXA_EP_OUT_ISO(6, 4, 1, 0, 0), | |
2397 | PXA_EP_IN_INT(7, 5, 1, 0, 0), | |
2398 | /* Endpoints for RNDIS, serial */ | |
2399 | PXA_EP_OUT_BULK(8, 1, 2, 0, 0), | |
2400 | PXA_EP_IN_BULK(9, 2, 2, 0, 0), | |
2401 | PXA_EP_IN_INT(10, 5, 2, 0, 0), | |
2402 | /* | |
2403 | * All the following endpoints are only for completion. They | |
2404 | * won't never work, as multiple interfaces are really broken on | |
2405 | * the pxa. | |
2406 | */ | |
2407 | PXA_EP_OUT_BULK(11, 1, 2, 1, 0), | |
2408 | PXA_EP_IN_BULK(12, 2, 2, 1, 0), | |
2409 | /* Endpoint for CDC Ether */ | |
2410 | PXA_EP_OUT_BULK(13, 1, 1, 1, 1), | |
2411 | PXA_EP_IN_BULK(14, 2, 1, 1, 1), | |
2412 | } | |
2413 | }; | |
2414 | ||
2415 | /** | |
2416 | * pxa_udc_probe - probes the udc device | |
2417 | * @_dev: platform device | |
2418 | * | |
2419 | * Perform basic init : allocates udc clock, creates sysfs files, requests | |
2420 | * irq. | |
2421 | */ | |
2422 | static int __init pxa_udc_probe(struct platform_device *pdev) | |
2423 | { | |
2424 | struct resource *regs; | |
2425 | struct pxa_udc *udc = &memory; | |
eb507025 | 2426 | int retval = 0, gpio; |
d75379a5 RJ |
2427 | |
2428 | regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
2429 | if (!regs) | |
2430 | return -ENXIO; | |
2431 | udc->irq = platform_get_irq(pdev, 0); | |
2432 | if (udc->irq < 0) | |
2433 | return udc->irq; | |
2434 | ||
2435 | udc->dev = &pdev->dev; | |
2436 | udc->mach = pdev->dev.platform_data; | |
662dca54 | 2437 | udc->transceiver = usb_get_phy(USB_PHY_TYPE_USB2); |
d75379a5 | 2438 | |
eb507025 RJ |
2439 | gpio = udc->mach->gpio_pullup; |
2440 | if (gpio_is_valid(gpio)) { | |
2441 | retval = gpio_request(gpio, "USB D+ pullup"); | |
2442 | if (retval == 0) | |
2443 | gpio_direction_output(gpio, | |
2444 | udc->mach->gpio_pullup_inverted); | |
2445 | } | |
2446 | if (retval) { | |
2447 | dev_err(&pdev->dev, "Couldn't request gpio %d : %d\n", | |
2448 | gpio, retval); | |
2449 | return retval; | |
2450 | } | |
2451 | ||
e0d8b13a | 2452 | udc->clk = clk_get(&pdev->dev, NULL); |
d75379a5 RJ |
2453 | if (IS_ERR(udc->clk)) { |
2454 | retval = PTR_ERR(udc->clk); | |
2455 | goto err_clk; | |
2456 | } | |
2457 | ||
2458 | retval = -ENOMEM; | |
5c90e314 | 2459 | udc->regs = ioremap(regs->start, resource_size(regs)); |
d75379a5 RJ |
2460 | if (!udc->regs) { |
2461 | dev_err(&pdev->dev, "Unable to map UDC I/O memory\n"); | |
2462 | goto err_map; | |
2463 | } | |
2464 | ||
2465 | device_initialize(&udc->gadget.dev); | |
2466 | udc->gadget.dev.parent = &pdev->dev; | |
2467 | udc->gadget.dev.dma_mask = NULL; | |
b799a7eb | 2468 | udc->vbus_sensed = 0; |
d75379a5 RJ |
2469 | |
2470 | the_controller = udc; | |
2471 | platform_set_drvdata(pdev, udc); | |
2472 | udc_init_data(udc); | |
2473 | pxa_eps_setup(udc); | |
2474 | ||
2475 | /* irq setup after old hardware state is cleaned up */ | |
2476 | retval = request_irq(udc->irq, pxa_udc_irq, | |
2477 | IRQF_SHARED, driver_name, udc); | |
2478 | if (retval != 0) { | |
2479 | dev_err(udc->dev, "%s: can't get irq %i, err %d\n", | |
ef614403 | 2480 | driver_name, udc->irq, retval); |
d75379a5 RJ |
2481 | goto err_irq; |
2482 | } | |
0f91349b SAS |
2483 | retval = usb_add_gadget_udc(&pdev->dev, &udc->gadget); |
2484 | if (retval) | |
2485 | goto err_add_udc; | |
d75379a5 RJ |
2486 | |
2487 | pxa_init_debugfs(udc); | |
2488 | return 0; | |
0f91349b SAS |
2489 | err_add_udc: |
2490 | free_irq(udc->irq, udc); | |
d75379a5 RJ |
2491 | err_irq: |
2492 | iounmap(udc->regs); | |
2493 | err_map: | |
2494 | clk_put(udc->clk); | |
2495 | udc->clk = NULL; | |
2496 | err_clk: | |
2497 | return retval; | |
2498 | } | |
2499 | ||
2500 | /** | |
2501 | * pxa_udc_remove - removes the udc device driver | |
2502 | * @_dev: platform device | |
2503 | */ | |
2504 | static int __exit pxa_udc_remove(struct platform_device *_dev) | |
2505 | { | |
2506 | struct pxa_udc *udc = platform_get_drvdata(_dev); | |
eb507025 | 2507 | int gpio = udc->mach->gpio_pullup; |
d75379a5 | 2508 | |
0f91349b | 2509 | usb_del_gadget_udc(&udc->gadget); |
d75379a5 RJ |
2510 | usb_gadget_unregister_driver(udc->driver); |
2511 | free_irq(udc->irq, udc); | |
2512 | pxa_cleanup_debugfs(udc); | |
eb507025 RJ |
2513 | if (gpio_is_valid(gpio)) |
2514 | gpio_free(gpio); | |
d75379a5 | 2515 | |
721002ec | 2516 | usb_put_phy(udc->transceiver); |
7fec3c25 RJ |
2517 | |
2518 | udc->transceiver = NULL; | |
d75379a5 RJ |
2519 | platform_set_drvdata(_dev, NULL); |
2520 | the_controller = NULL; | |
2521 | clk_put(udc->clk); | |
4c24b6d0 | 2522 | iounmap(udc->regs); |
d75379a5 RJ |
2523 | |
2524 | return 0; | |
2525 | } | |
2526 | ||
2527 | static void pxa_udc_shutdown(struct platform_device *_dev) | |
2528 | { | |
2529 | struct pxa_udc *udc = platform_get_drvdata(_dev); | |
2530 | ||
5a59bc54 RJ |
2531 | if (udc_readl(udc, UDCCR) & UDCCR_UDE) |
2532 | udc_disable(udc); | |
d75379a5 RJ |
2533 | } |
2534 | ||
59376cc3 | 2535 | #ifdef CONFIG_PXA27x |
f6d529f9 DB |
2536 | extern void pxa27x_clear_otgph(void); |
2537 | #else | |
2538 | #define pxa27x_clear_otgph() do {} while (0) | |
2539 | #endif | |
2540 | ||
d75379a5 RJ |
2541 | #ifdef CONFIG_PM |
2542 | /** | |
2543 | * pxa_udc_suspend - Suspend udc device | |
2544 | * @_dev: platform device | |
2545 | * @state: suspend state | |
2546 | * | |
2547 | * Suspends udc : saves configuration registers (UDCCR*), then disables the udc | |
2548 | * device. | |
2549 | */ | |
2550 | static int pxa_udc_suspend(struct platform_device *_dev, pm_message_t state) | |
2551 | { | |
2552 | int i; | |
2553 | struct pxa_udc *udc = platform_get_drvdata(_dev); | |
2554 | struct pxa_ep *ep; | |
2555 | ||
2556 | ep = &udc->pxa_ep[0]; | |
2557 | udc->udccsr0 = udc_ep_readl(ep, UDCCSR); | |
2558 | for (i = 1; i < NR_PXA_ENDPOINTS; i++) { | |
2559 | ep = &udc->pxa_ep[i]; | |
2560 | ep->udccsr_value = udc_ep_readl(ep, UDCCSR); | |
2561 | ep->udccr_value = udc_ep_readl(ep, UDCCR); | |
2562 | ep_dbg(ep, "udccsr:0x%03x, udccr:0x%x\n", | |
2563 | ep->udccsr_value, ep->udccr_value); | |
2564 | } | |
2565 | ||
2566 | udc_disable(udc); | |
eb507025 RJ |
2567 | udc->pullup_resume = udc->pullup_on; |
2568 | dplus_pullup(udc, 0); | |
d75379a5 RJ |
2569 | |
2570 | return 0; | |
2571 | } | |
2572 | ||
2573 | /** | |
2574 | * pxa_udc_resume - Resume udc device | |
2575 | * @_dev: platform device | |
2576 | * | |
2577 | * Resumes udc : restores configuration registers (UDCCR*), then enables the udc | |
2578 | * device. | |
2579 | */ | |
2580 | static int pxa_udc_resume(struct platform_device *_dev) | |
2581 | { | |
2582 | int i; | |
2583 | struct pxa_udc *udc = platform_get_drvdata(_dev); | |
2584 | struct pxa_ep *ep; | |
2585 | ||
2586 | ep = &udc->pxa_ep[0]; | |
2587 | udc_ep_writel(ep, UDCCSR, udc->udccsr0 & (UDCCSR0_FST | UDCCSR0_DME)); | |
2588 | for (i = 1; i < NR_PXA_ENDPOINTS; i++) { | |
2589 | ep = &udc->pxa_ep[i]; | |
2590 | udc_ep_writel(ep, UDCCSR, ep->udccsr_value); | |
2591 | udc_ep_writel(ep, UDCCR, ep->udccr_value); | |
2592 | ep_dbg(ep, "udccsr:0x%03x, udccr:0x%x\n", | |
2593 | ep->udccsr_value, ep->udccr_value); | |
2594 | } | |
2595 | ||
eb507025 RJ |
2596 | dplus_pullup(udc, udc->pullup_resume); |
2597 | if (should_enable_udc(udc)) | |
2598 | udc_enable(udc); | |
d75379a5 RJ |
2599 | /* |
2600 | * We do not handle OTG yet. | |
2601 | * | |
2602 | * OTGPH bit is set when sleep mode is entered. | |
2603 | * it indicates that OTG pad is retaining its state. | |
2604 | * Upon exit from sleep mode and before clearing OTGPH, | |
2605 | * Software must configure the USB OTG pad, UDC, and UHC | |
2606 | * to the state they were in before entering sleep mode. | |
d75379a5 | 2607 | */ |
f6d529f9 | 2608 | pxa27x_clear_otgph(); |
d75379a5 RJ |
2609 | |
2610 | return 0; | |
2611 | } | |
2612 | #endif | |
2613 | ||
2614 | /* work with hotplug and coldplug */ | |
7a857620 | 2615 | MODULE_ALIAS("platform:pxa27x-udc"); |
d75379a5 RJ |
2616 | |
2617 | static struct platform_driver udc_driver = { | |
2618 | .driver = { | |
7a857620 | 2619 | .name = "pxa27x-udc", |
d75379a5 RJ |
2620 | .owner = THIS_MODULE, |
2621 | }, | |
2622 | .remove = __exit_p(pxa_udc_remove), | |
2623 | .shutdown = pxa_udc_shutdown, | |
2624 | #ifdef CONFIG_PM | |
2625 | .suspend = pxa_udc_suspend, | |
2626 | .resume = pxa_udc_resume | |
2627 | #endif | |
2628 | }; | |
2629 | ||
2630 | static int __init udc_init(void) | |
2631 | { | |
9f5351b7 | 2632 | if (!cpu_is_pxa27x() && !cpu_is_pxa3xx()) |
5a59bc54 RJ |
2633 | return -ENODEV; |
2634 | ||
d75379a5 RJ |
2635 | printk(KERN_INFO "%s: version %s\n", driver_name, DRIVER_VERSION); |
2636 | return platform_driver_probe(&udc_driver, pxa_udc_probe); | |
2637 | } | |
2638 | module_init(udc_init); | |
2639 | ||
2640 | ||
2641 | static void __exit udc_exit(void) | |
2642 | { | |
2643 | platform_driver_unregister(&udc_driver); | |
2644 | } | |
2645 | module_exit(udc_exit); | |
2646 | ||
2647 | MODULE_DESCRIPTION(DRIVER_DESC); | |
2648 | MODULE_AUTHOR("Robert Jarzmik"); | |
2649 | MODULE_LICENSE("GPL"); |