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1da177e4 LT |
1 | /* |
2 | * linux/drivers/usb/gadget/lh7a40x_udc.c | |
3 | * Sharp LH7A40x on-chip full speed USB device controllers | |
4 | * | |
5 | * Copyright (C) 2004 Mikko Lahteenmaki, Nordic ID | |
6 | * Copyright (C) 2004 Bo Henriksen, Nordic ID | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | * | |
22 | */ | |
23 | ||
d052d1be RK |
24 | #include <linux/platform_device.h> |
25 | ||
1da177e4 LT |
26 | #include "lh7a40x_udc.h" |
27 | ||
28 | //#define DEBUG printk | |
29 | //#define DEBUG_EP0 printk | |
30 | //#define DEBUG_SETUP printk | |
31 | ||
32 | #ifndef DEBUG_EP0 | |
33 | # define DEBUG_EP0(fmt,args...) | |
34 | #endif | |
35 | #ifndef DEBUG_SETUP | |
36 | # define DEBUG_SETUP(fmt,args...) | |
37 | #endif | |
38 | #ifndef DEBUG | |
39 | # define NO_STATES | |
40 | # define DEBUG(fmt,args...) | |
41 | #endif | |
42 | ||
43 | #define DRIVER_DESC "LH7A40x USB Device Controller" | |
44 | #define DRIVER_VERSION __DATE__ | |
45 | ||
46 | #ifndef _BIT /* FIXME - what happended to _BIT in 2.6.7bk18? */ | |
47 | #define _BIT(x) (1<<(x)) | |
48 | #endif | |
49 | ||
50 | struct lh7a40x_udc *the_controller; | |
51 | ||
52 | static const char driver_name[] = "lh7a40x_udc"; | |
53 | static const char driver_desc[] = DRIVER_DESC; | |
54 | static const char ep0name[] = "ep0-control"; | |
55 | ||
56 | /* | |
57 | Local definintions. | |
58 | */ | |
59 | ||
60 | #ifndef NO_STATES | |
61 | static char *state_names[] = { | |
62 | "WAIT_FOR_SETUP", | |
63 | "DATA_STATE_XMIT", | |
64 | "DATA_STATE_NEED_ZLP", | |
65 | "WAIT_FOR_OUT_STATUS", | |
66 | "DATA_STATE_RECV" | |
67 | }; | |
68 | #endif | |
69 | ||
70 | /* | |
71 | Local declarations. | |
72 | */ | |
73 | static int lh7a40x_ep_enable(struct usb_ep *ep, | |
74 | const struct usb_endpoint_descriptor *); | |
75 | static int lh7a40x_ep_disable(struct usb_ep *ep); | |
55016f10 | 76 | static struct usb_request *lh7a40x_alloc_request(struct usb_ep *ep, gfp_t); |
1da177e4 LT |
77 | static void lh7a40x_free_request(struct usb_ep *ep, struct usb_request *); |
78 | static void *lh7a40x_alloc_buffer(struct usb_ep *ep, unsigned, dma_addr_t *, | |
55016f10 | 79 | gfp_t); |
1da177e4 LT |
80 | static void lh7a40x_free_buffer(struct usb_ep *ep, void *, dma_addr_t, |
81 | unsigned); | |
55016f10 | 82 | static int lh7a40x_queue(struct usb_ep *ep, struct usb_request *, gfp_t); |
1da177e4 LT |
83 | static int lh7a40x_dequeue(struct usb_ep *ep, struct usb_request *); |
84 | static int lh7a40x_set_halt(struct usb_ep *ep, int); | |
85 | static int lh7a40x_fifo_status(struct usb_ep *ep); | |
86 | static int lh7a40x_fifo_status(struct usb_ep *ep); | |
87 | static void lh7a40x_fifo_flush(struct usb_ep *ep); | |
88 | static void lh7a40x_ep0_kick(struct lh7a40x_udc *dev, struct lh7a40x_ep *ep); | |
89 | static void lh7a40x_handle_ep0(struct lh7a40x_udc *dev, u32 intr); | |
90 | ||
91 | static void done(struct lh7a40x_ep *ep, struct lh7a40x_request *req, | |
92 | int status); | |
93 | static void pio_irq_enable(int bEndpointAddress); | |
94 | static void pio_irq_disable(int bEndpointAddress); | |
95 | static void stop_activity(struct lh7a40x_udc *dev, | |
96 | struct usb_gadget_driver *driver); | |
97 | static void flush(struct lh7a40x_ep *ep); | |
98 | static void udc_enable(struct lh7a40x_udc *dev); | |
99 | static void udc_set_address(struct lh7a40x_udc *dev, unsigned char address); | |
100 | ||
101 | static struct usb_ep_ops lh7a40x_ep_ops = { | |
102 | .enable = lh7a40x_ep_enable, | |
103 | .disable = lh7a40x_ep_disable, | |
104 | ||
105 | .alloc_request = lh7a40x_alloc_request, | |
106 | .free_request = lh7a40x_free_request, | |
107 | ||
108 | .alloc_buffer = lh7a40x_alloc_buffer, | |
109 | .free_buffer = lh7a40x_free_buffer, | |
110 | ||
111 | .queue = lh7a40x_queue, | |
112 | .dequeue = lh7a40x_dequeue, | |
113 | ||
114 | .set_halt = lh7a40x_set_halt, | |
115 | .fifo_status = lh7a40x_fifo_status, | |
116 | .fifo_flush = lh7a40x_fifo_flush, | |
117 | }; | |
118 | ||
119 | /* Inline code */ | |
120 | ||
121 | static __inline__ int write_packet(struct lh7a40x_ep *ep, | |
122 | struct lh7a40x_request *req, int max) | |
123 | { | |
124 | u8 *buf; | |
125 | int length, count; | |
126 | volatile u32 *fifo = (volatile u32 *)ep->fifo; | |
127 | ||
128 | buf = req->req.buf + req->req.actual; | |
129 | prefetch(buf); | |
130 | ||
131 | length = req->req.length - req->req.actual; | |
132 | length = min(length, max); | |
133 | req->req.actual += length; | |
134 | ||
135 | DEBUG("Write %d (max %d), fifo %p\n", length, max, fifo); | |
136 | ||
137 | count = length; | |
138 | while (count--) { | |
139 | *fifo = *buf++; | |
140 | } | |
141 | ||
142 | return length; | |
143 | } | |
144 | ||
145 | static __inline__ void usb_set_index(u32 ep) | |
146 | { | |
147 | *(volatile u32 *)io_p2v(USB_INDEX) = ep; | |
148 | } | |
149 | ||
150 | static __inline__ u32 usb_read(u32 port) | |
151 | { | |
152 | return *(volatile u32 *)io_p2v(port); | |
153 | } | |
154 | ||
155 | static __inline__ void usb_write(u32 val, u32 port) | |
156 | { | |
157 | *(volatile u32 *)io_p2v(port) = val; | |
158 | } | |
159 | ||
160 | static __inline__ void usb_set(u32 val, u32 port) | |
161 | { | |
162 | volatile u32 *ioport = (volatile u32 *)io_p2v(port); | |
163 | u32 after = (*ioport) | val; | |
164 | *ioport = after; | |
165 | } | |
166 | ||
167 | static __inline__ void usb_clear(u32 val, u32 port) | |
168 | { | |
169 | volatile u32 *ioport = (volatile u32 *)io_p2v(port); | |
170 | u32 after = (*ioport) & ~val; | |
171 | *ioport = after; | |
172 | } | |
173 | ||
174 | /*-------------------------------------------------------------------------*/ | |
175 | ||
176 | #define GPIO_PORTC_DR (0x80000E08) | |
177 | #define GPIO_PORTC_DDR (0x80000E18) | |
178 | #define GPIO_PORTC_PDR (0x80000E70) | |
179 | ||
180 | /* get port C pin data register */ | |
181 | #define get_portc_pdr(bit) ((usb_read(GPIO_PORTC_PDR) & _BIT(bit)) != 0) | |
182 | /* get port C data direction register */ | |
183 | #define get_portc_ddr(bit) ((usb_read(GPIO_PORTC_DDR) & _BIT(bit)) != 0) | |
184 | /* set port C data register */ | |
185 | #define set_portc_dr(bit, val) (val ? usb_set(_BIT(bit), GPIO_PORTC_DR) : usb_clear(_BIT(bit), GPIO_PORTC_DR)) | |
186 | /* set port C data direction register */ | |
187 | #define set_portc_ddr(bit, val) (val ? usb_set(_BIT(bit), GPIO_PORTC_DDR) : usb_clear(_BIT(bit), GPIO_PORTC_DDR)) | |
188 | ||
189 | /* | |
190 | * LPD7A404 GPIO's: | |
191 | * Port C bit 1 = USB Port 1 Power Enable | |
192 | * Port C bit 2 = USB Port 1 Data Carrier Detect | |
193 | */ | |
194 | #define is_usb_connected() get_portc_pdr(2) | |
195 | ||
196 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
197 | ||
198 | static const char proc_node_name[] = "driver/udc"; | |
199 | ||
200 | static int | |
201 | udc_proc_read(char *page, char **start, off_t off, int count, | |
202 | int *eof, void *_dev) | |
203 | { | |
204 | char *buf = page; | |
205 | struct lh7a40x_udc *dev = _dev; | |
206 | char *next = buf; | |
207 | unsigned size = count; | |
208 | unsigned long flags; | |
209 | int t; | |
210 | ||
211 | if (off != 0) | |
212 | return 0; | |
213 | ||
214 | local_irq_save(flags); | |
215 | ||
216 | /* basic device status */ | |
217 | t = scnprintf(next, size, | |
218 | DRIVER_DESC "\n" | |
219 | "%s version: %s\n" | |
220 | "Gadget driver: %s\n" | |
221 | "Host: %s\n\n", | |
222 | driver_name, DRIVER_VERSION, | |
223 | dev->driver ? dev->driver->driver.name : "(none)", | |
224 | is_usb_connected()? "full speed" : "disconnected"); | |
225 | size -= t; | |
226 | next += t; | |
227 | ||
228 | t = scnprintf(next, size, | |
229 | "GPIO:\n" | |
230 | " Port C bit 1: %d, dir %d\n" | |
231 | " Port C bit 2: %d, dir %d\n\n", | |
232 | get_portc_pdr(1), get_portc_ddr(1), | |
233 | get_portc_pdr(2), get_portc_ddr(2) | |
234 | ); | |
235 | size -= t; | |
236 | next += t; | |
237 | ||
238 | t = scnprintf(next, size, | |
239 | "DCP pullup: %d\n\n", | |
240 | (usb_read(USB_PM) & PM_USB_DCP) != 0); | |
241 | size -= t; | |
242 | next += t; | |
243 | ||
244 | local_irq_restore(flags); | |
245 | *eof = 1; | |
246 | return count - size; | |
247 | } | |
248 | ||
249 | #define create_proc_files() create_proc_read_entry(proc_node_name, 0, NULL, udc_proc_read, dev) | |
250 | #define remove_proc_files() remove_proc_entry(proc_node_name, NULL) | |
251 | ||
252 | #else /* !CONFIG_USB_GADGET_DEBUG_FILES */ | |
253 | ||
254 | #define create_proc_files() do {} while (0) | |
255 | #define remove_proc_files() do {} while (0) | |
256 | ||
257 | #endif /* CONFIG_USB_GADGET_DEBUG_FILES */ | |
258 | ||
259 | /* | |
260 | * udc_disable - disable USB device controller | |
261 | */ | |
262 | static void udc_disable(struct lh7a40x_udc *dev) | |
263 | { | |
264 | DEBUG("%s, %p\n", __FUNCTION__, dev); | |
265 | ||
266 | udc_set_address(dev, 0); | |
267 | ||
268 | /* Disable interrupts */ | |
269 | usb_write(0, USB_IN_INT_EN); | |
270 | usb_write(0, USB_OUT_INT_EN); | |
271 | usb_write(0, USB_INT_EN); | |
272 | ||
273 | /* Disable the USB */ | |
274 | usb_write(0, USB_PM); | |
275 | ||
276 | #ifdef CONFIG_ARCH_LH7A404 | |
277 | /* Disable USB power */ | |
278 | set_portc_dr(1, 0); | |
279 | #endif | |
280 | ||
281 | /* if hardware supports it, disconnect from usb */ | |
282 | /* make_usb_disappear(); */ | |
283 | ||
284 | dev->ep0state = WAIT_FOR_SETUP; | |
285 | dev->gadget.speed = USB_SPEED_UNKNOWN; | |
286 | dev->usb_address = 0; | |
287 | } | |
288 | ||
289 | /* | |
290 | * udc_reinit - initialize software state | |
291 | */ | |
292 | static void udc_reinit(struct lh7a40x_udc *dev) | |
293 | { | |
294 | u32 i; | |
295 | ||
296 | DEBUG("%s, %p\n", __FUNCTION__, dev); | |
297 | ||
298 | /* device/ep0 records init */ | |
299 | INIT_LIST_HEAD(&dev->gadget.ep_list); | |
300 | INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); | |
301 | dev->ep0state = WAIT_FOR_SETUP; | |
302 | ||
303 | /* basic endpoint records init */ | |
304 | for (i = 0; i < UDC_MAX_ENDPOINTS; i++) { | |
305 | struct lh7a40x_ep *ep = &dev->ep[i]; | |
306 | ||
307 | if (i != 0) | |
308 | list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list); | |
309 | ||
310 | ep->desc = 0; | |
311 | ep->stopped = 0; | |
312 | INIT_LIST_HEAD(&ep->queue); | |
313 | ep->pio_irqs = 0; | |
314 | } | |
315 | ||
316 | /* the rest was statically initialized, and is read-only */ | |
317 | } | |
318 | ||
319 | #define BYTES2MAXP(x) (x / 8) | |
320 | #define MAXP2BYTES(x) (x * 8) | |
321 | ||
322 | /* until it's enabled, this UDC should be completely invisible | |
323 | * to any USB host. | |
324 | */ | |
325 | static void udc_enable(struct lh7a40x_udc *dev) | |
326 | { | |
327 | int ep; | |
328 | ||
329 | DEBUG("%s, %p\n", __FUNCTION__, dev); | |
330 | ||
331 | dev->gadget.speed = USB_SPEED_UNKNOWN; | |
332 | ||
333 | #ifdef CONFIG_ARCH_LH7A404 | |
334 | /* Set Port C bit 1 & 2 as output */ | |
335 | set_portc_ddr(1, 1); | |
336 | set_portc_ddr(2, 1); | |
337 | ||
338 | /* Enable USB power */ | |
339 | set_portc_dr(1, 0); | |
340 | #endif | |
341 | ||
342 | /* | |
343 | * C.f Chapter 18.1.3.1 Initializing the USB | |
344 | */ | |
345 | ||
346 | /* Disable the USB */ | |
347 | usb_clear(PM_USB_ENABLE, USB_PM); | |
348 | ||
349 | /* Reset APB & I/O sides of the USB */ | |
350 | usb_set(USB_RESET_APB | USB_RESET_IO, USB_RESET); | |
351 | mdelay(5); | |
352 | usb_clear(USB_RESET_APB | USB_RESET_IO, USB_RESET); | |
353 | ||
354 | /* Set MAXP values for each */ | |
355 | for (ep = 0; ep < UDC_MAX_ENDPOINTS; ep++) { | |
356 | struct lh7a40x_ep *ep_reg = &dev->ep[ep]; | |
357 | u32 csr; | |
358 | ||
359 | usb_set_index(ep); | |
360 | ||
361 | switch (ep_reg->ep_type) { | |
362 | case ep_bulk_in: | |
363 | case ep_interrupt: | |
364 | usb_clear(USB_IN_CSR2_USB_DMA_EN | USB_IN_CSR2_AUTO_SET, | |
365 | ep_reg->csr2); | |
366 | /* Fall through */ | |
367 | case ep_control: | |
368 | usb_write(BYTES2MAXP(ep_maxpacket(ep_reg)), | |
369 | USB_IN_MAXP); | |
370 | break; | |
371 | case ep_bulk_out: | |
372 | usb_clear(USB_OUT_CSR2_USB_DMA_EN | | |
373 | USB_OUT_CSR2_AUTO_CLR, ep_reg->csr2); | |
374 | usb_write(BYTES2MAXP(ep_maxpacket(ep_reg)), | |
375 | USB_OUT_MAXP); | |
376 | break; | |
377 | } | |
378 | ||
379 | /* Read & Write CSR1, just in case */ | |
380 | csr = usb_read(ep_reg->csr1); | |
381 | usb_write(csr, ep_reg->csr1); | |
382 | ||
383 | flush(ep_reg); | |
384 | } | |
385 | ||
386 | /* Disable interrupts */ | |
387 | usb_write(0, USB_IN_INT_EN); | |
388 | usb_write(0, USB_OUT_INT_EN); | |
389 | usb_write(0, USB_INT_EN); | |
390 | ||
391 | /* Enable interrupts */ | |
392 | usb_set(USB_IN_INT_EP0, USB_IN_INT_EN); | |
393 | usb_set(USB_INT_RESET_INT | USB_INT_RESUME_INT, USB_INT_EN); | |
394 | /* Dont enable rest of the interrupts */ | |
395 | /* usb_set(USB_IN_INT_EP3 | USB_IN_INT_EP1 | USB_IN_INT_EP0, USB_IN_INT_EN); | |
396 | usb_set(USB_OUT_INT_EP2, USB_OUT_INT_EN); */ | |
397 | ||
398 | /* Enable SUSPEND */ | |
399 | usb_set(PM_ENABLE_SUSPEND, USB_PM); | |
400 | ||
401 | /* Enable the USB */ | |
402 | usb_set(PM_USB_ENABLE, USB_PM); | |
403 | ||
404 | #ifdef CONFIG_ARCH_LH7A404 | |
405 | /* NOTE: DOES NOT WORK! */ | |
406 | /* Let host detect UDC: | |
407 | * Software must write a 0 to the PMR:DCP_CTRL bit to turn this | |
408 | * transistor on and pull the USBDP pin HIGH. | |
409 | */ | |
410 | /* usb_clear(PM_USB_DCP, USB_PM); | |
411 | usb_set(PM_USB_DCP, USB_PM); */ | |
412 | #endif | |
413 | } | |
414 | ||
415 | /* | |
416 | Register entry point for the peripheral controller driver. | |
417 | */ | |
418 | int usb_gadget_register_driver(struct usb_gadget_driver *driver) | |
419 | { | |
420 | struct lh7a40x_udc *dev = the_controller; | |
421 | int retval; | |
422 | ||
423 | DEBUG("%s: %s\n", __FUNCTION__, driver->driver.name); | |
424 | ||
425 | if (!driver | |
426 | || driver->speed != USB_SPEED_FULL | |
427 | || !driver->bind | |
428 | || !driver->unbind || !driver->disconnect || !driver->setup) | |
429 | return -EINVAL; | |
430 | if (!dev) | |
431 | return -ENODEV; | |
432 | if (dev->driver) | |
433 | return -EBUSY; | |
434 | ||
435 | /* first hook up the driver ... */ | |
436 | dev->driver = driver; | |
437 | dev->gadget.dev.driver = &driver->driver; | |
438 | ||
439 | device_add(&dev->gadget.dev); | |
440 | retval = driver->bind(&dev->gadget); | |
441 | if (retval) { | |
442 | printk("%s: bind to driver %s --> error %d\n", dev->gadget.name, | |
443 | driver->driver.name, retval); | |
444 | device_del(&dev->gadget.dev); | |
445 | ||
446 | dev->driver = 0; | |
447 | dev->gadget.dev.driver = 0; | |
448 | return retval; | |
449 | } | |
450 | ||
451 | /* ... then enable host detection and ep0; and we're ready | |
452 | * for set_configuration as well as eventual disconnect. | |
453 | * NOTE: this shouldn't power up until later. | |
454 | */ | |
455 | printk("%s: registered gadget driver '%s'\n", dev->gadget.name, | |
456 | driver->driver.name); | |
457 | ||
458 | udc_enable(dev); | |
459 | ||
460 | return 0; | |
461 | } | |
462 | ||
463 | EXPORT_SYMBOL(usb_gadget_register_driver); | |
464 | ||
465 | /* | |
466 | Unregister entry point for the peripheral controller driver. | |
467 | */ | |
468 | int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) | |
469 | { | |
470 | struct lh7a40x_udc *dev = the_controller; | |
471 | unsigned long flags; | |
472 | ||
473 | if (!dev) | |
474 | return -ENODEV; | |
475 | if (!driver || driver != dev->driver) | |
476 | return -EINVAL; | |
477 | ||
478 | spin_lock_irqsave(&dev->lock, flags); | |
479 | dev->driver = 0; | |
480 | stop_activity(dev, driver); | |
481 | spin_unlock_irqrestore(&dev->lock, flags); | |
482 | ||
483 | driver->unbind(&dev->gadget); | |
484 | device_del(&dev->gadget.dev); | |
485 | ||
486 | udc_disable(dev); | |
487 | ||
488 | DEBUG("unregistered gadget driver '%s'\n", driver->driver.name); | |
489 | return 0; | |
490 | } | |
491 | ||
492 | EXPORT_SYMBOL(usb_gadget_unregister_driver); | |
493 | ||
494 | /*-------------------------------------------------------------------------*/ | |
495 | ||
496 | /** Write request to FIFO (max write == maxp size) | |
497 | * Return: 0 = still running, 1 = completed, negative = errno | |
498 | * NOTE: INDEX register must be set for EP | |
499 | */ | |
500 | static int write_fifo(struct lh7a40x_ep *ep, struct lh7a40x_request *req) | |
501 | { | |
502 | u32 max; | |
503 | u32 csr; | |
504 | ||
505 | max = le16_to_cpu(ep->desc->wMaxPacketSize); | |
506 | ||
507 | csr = usb_read(ep->csr1); | |
508 | DEBUG("CSR: %x %d\n", csr, csr & USB_IN_CSR1_FIFO_NOT_EMPTY); | |
509 | ||
510 | if (!(csr & USB_IN_CSR1_FIFO_NOT_EMPTY)) { | |
511 | unsigned count; | |
512 | int is_last, is_short; | |
513 | ||
514 | count = write_packet(ep, req, max); | |
515 | usb_set(USB_IN_CSR1_IN_PKT_RDY, ep->csr1); | |
516 | ||
517 | /* last packet is usually short (or a zlp) */ | |
518 | if (unlikely(count != max)) | |
519 | is_last = is_short = 1; | |
520 | else { | |
521 | if (likely(req->req.length != req->req.actual) | |
522 | || req->req.zero) | |
523 | is_last = 0; | |
524 | else | |
525 | is_last = 1; | |
526 | /* interrupt/iso maxpacket may not fill the fifo */ | |
527 | is_short = unlikely(max < ep_maxpacket(ep)); | |
528 | } | |
529 | ||
530 | DEBUG("%s: wrote %s %d bytes%s%s %d left %p\n", __FUNCTION__, | |
531 | ep->ep.name, count, | |
532 | is_last ? "/L" : "", is_short ? "/S" : "", | |
533 | req->req.length - req->req.actual, req); | |
534 | ||
535 | /* requests complete when all IN data is in the FIFO */ | |
536 | if (is_last) { | |
537 | done(ep, req, 0); | |
538 | if (list_empty(&ep->queue)) { | |
539 | pio_irq_disable(ep_index(ep)); | |
540 | } | |
541 | return 1; | |
542 | } | |
543 | } else { | |
544 | DEBUG("Hmm.. %d ep FIFO is not empty!\n", ep_index(ep)); | |
545 | } | |
546 | ||
547 | return 0; | |
548 | } | |
549 | ||
550 | /** Read to request from FIFO (max read == bytes in fifo) | |
551 | * Return: 0 = still running, 1 = completed, negative = errno | |
552 | * NOTE: INDEX register must be set for EP | |
553 | */ | |
554 | static int read_fifo(struct lh7a40x_ep *ep, struct lh7a40x_request *req) | |
555 | { | |
556 | u32 csr; | |
557 | u8 *buf; | |
558 | unsigned bufferspace, count, is_short; | |
559 | volatile u32 *fifo = (volatile u32 *)ep->fifo; | |
560 | ||
561 | /* make sure there's a packet in the FIFO. */ | |
562 | csr = usb_read(ep->csr1); | |
563 | if (!(csr & USB_OUT_CSR1_OUT_PKT_RDY)) { | |
564 | DEBUG("%s: Packet NOT ready!\n", __FUNCTION__); | |
565 | return -EINVAL; | |
566 | } | |
567 | ||
568 | buf = req->req.buf + req->req.actual; | |
569 | prefetchw(buf); | |
570 | bufferspace = req->req.length - req->req.actual; | |
571 | ||
572 | /* read all bytes from this packet */ | |
573 | count = usb_read(USB_OUT_FIFO_WC1); | |
574 | req->req.actual += min(count, bufferspace); | |
575 | ||
576 | is_short = (count < ep->ep.maxpacket); | |
577 | DEBUG("read %s %02x, %d bytes%s req %p %d/%d\n", | |
578 | ep->ep.name, csr, count, | |
579 | is_short ? "/S" : "", req, req->req.actual, req->req.length); | |
580 | ||
581 | while (likely(count-- != 0)) { | |
582 | u8 byte = (u8) (*fifo & 0xff); | |
583 | ||
584 | if (unlikely(bufferspace == 0)) { | |
585 | /* this happens when the driver's buffer | |
586 | * is smaller than what the host sent. | |
587 | * discard the extra data. | |
588 | */ | |
589 | if (req->req.status != -EOVERFLOW) | |
590 | printk("%s overflow %d\n", ep->ep.name, count); | |
591 | req->req.status = -EOVERFLOW; | |
592 | } else { | |
593 | *buf++ = byte; | |
594 | bufferspace--; | |
595 | } | |
596 | } | |
597 | ||
598 | usb_clear(USB_OUT_CSR1_OUT_PKT_RDY, ep->csr1); | |
599 | ||
600 | /* completion */ | |
601 | if (is_short || req->req.actual == req->req.length) { | |
602 | done(ep, req, 0); | |
603 | usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1); | |
604 | ||
605 | if (list_empty(&ep->queue)) | |
606 | pio_irq_disable(ep_index(ep)); | |
607 | return 1; | |
608 | } | |
609 | ||
610 | /* finished that packet. the next one may be waiting... */ | |
611 | return 0; | |
612 | } | |
613 | ||
614 | /* | |
615 | * done - retire a request; caller blocked irqs | |
616 | * INDEX register is preserved to keep same | |
617 | */ | |
618 | static void done(struct lh7a40x_ep *ep, struct lh7a40x_request *req, int status) | |
619 | { | |
620 | unsigned int stopped = ep->stopped; | |
621 | u32 index; | |
622 | ||
623 | DEBUG("%s, %p\n", __FUNCTION__, ep); | |
624 | list_del_init(&req->queue); | |
625 | ||
626 | if (likely(req->req.status == -EINPROGRESS)) | |
627 | req->req.status = status; | |
628 | else | |
629 | status = req->req.status; | |
630 | ||
631 | if (status && status != -ESHUTDOWN) | |
632 | DEBUG("complete %s req %p stat %d len %u/%u\n", | |
633 | ep->ep.name, &req->req, status, | |
634 | req->req.actual, req->req.length); | |
635 | ||
636 | /* don't modify queue heads during completion callback */ | |
637 | ep->stopped = 1; | |
638 | /* Read current index (completion may modify it) */ | |
639 | index = usb_read(USB_INDEX); | |
640 | ||
641 | spin_unlock(&ep->dev->lock); | |
642 | req->req.complete(&ep->ep, &req->req); | |
643 | spin_lock(&ep->dev->lock); | |
644 | ||
645 | /* Restore index */ | |
646 | usb_set_index(index); | |
647 | ep->stopped = stopped; | |
648 | } | |
649 | ||
650 | /** Enable EP interrupt */ | |
651 | static void pio_irq_enable(int ep) | |
652 | { | |
653 | DEBUG("%s: %d\n", __FUNCTION__, ep); | |
654 | ||
655 | switch (ep) { | |
656 | case 1: | |
657 | usb_set(USB_IN_INT_EP1, USB_IN_INT_EN); | |
658 | break; | |
659 | case 2: | |
660 | usb_set(USB_OUT_INT_EP2, USB_OUT_INT_EN); | |
661 | break; | |
662 | case 3: | |
663 | usb_set(USB_IN_INT_EP3, USB_IN_INT_EN); | |
664 | break; | |
665 | default: | |
666 | DEBUG("Unknown endpoint: %d\n", ep); | |
667 | break; | |
668 | } | |
669 | } | |
670 | ||
671 | /** Disable EP interrupt */ | |
672 | static void pio_irq_disable(int ep) | |
673 | { | |
674 | DEBUG("%s: %d\n", __FUNCTION__, ep); | |
675 | ||
676 | switch (ep) { | |
677 | case 1: | |
678 | usb_clear(USB_IN_INT_EP1, USB_IN_INT_EN); | |
679 | break; | |
680 | case 2: | |
681 | usb_clear(USB_OUT_INT_EP2, USB_OUT_INT_EN); | |
682 | break; | |
683 | case 3: | |
684 | usb_clear(USB_IN_INT_EP3, USB_IN_INT_EN); | |
685 | break; | |
686 | default: | |
687 | DEBUG("Unknown endpoint: %d\n", ep); | |
688 | break; | |
689 | } | |
690 | } | |
691 | ||
692 | /* | |
693 | * nuke - dequeue ALL requests | |
694 | */ | |
695 | void nuke(struct lh7a40x_ep *ep, int status) | |
696 | { | |
697 | struct lh7a40x_request *req; | |
698 | ||
699 | DEBUG("%s, %p\n", __FUNCTION__, ep); | |
700 | ||
701 | /* Flush FIFO */ | |
702 | flush(ep); | |
703 | ||
704 | /* called with irqs blocked */ | |
705 | while (!list_empty(&ep->queue)) { | |
706 | req = list_entry(ep->queue.next, struct lh7a40x_request, queue); | |
707 | done(ep, req, status); | |
708 | } | |
709 | ||
093cf723 | 710 | /* Disable IRQ if EP is enabled (has descriptor) */ |
1da177e4 LT |
711 | if (ep->desc) |
712 | pio_irq_disable(ep_index(ep)); | |
713 | } | |
714 | ||
715 | /* | |
716 | void nuke_all(struct lh7a40x_udc *dev) | |
717 | { | |
718 | int n; | |
719 | for(n=0; n<UDC_MAX_ENDPOINTS; n++) { | |
720 | struct lh7a40x_ep *ep = &dev->ep[n]; | |
721 | usb_set_index(n); | |
722 | nuke(ep, 0); | |
723 | } | |
724 | }*/ | |
725 | ||
726 | /* | |
727 | static void flush_all(struct lh7a40x_udc *dev) | |
728 | { | |
729 | int n; | |
730 | for (n = 0; n < UDC_MAX_ENDPOINTS; n++) | |
731 | { | |
732 | struct lh7a40x_ep *ep = &dev->ep[n]; | |
733 | flush(ep); | |
734 | } | |
735 | } | |
736 | */ | |
737 | ||
738 | /** Flush EP | |
739 | * NOTE: INDEX register must be set before this call | |
740 | */ | |
741 | static void flush(struct lh7a40x_ep *ep) | |
742 | { | |
743 | DEBUG("%s, %p\n", __FUNCTION__, ep); | |
744 | ||
745 | switch (ep->ep_type) { | |
746 | case ep_control: | |
747 | /* check, by implication c.f. 15.1.2.11 */ | |
748 | break; | |
749 | ||
750 | case ep_bulk_in: | |
751 | case ep_interrupt: | |
752 | /* if(csr & USB_IN_CSR1_IN_PKT_RDY) */ | |
753 | usb_set(USB_IN_CSR1_FIFO_FLUSH, ep->csr1); | |
754 | break; | |
755 | ||
756 | case ep_bulk_out: | |
757 | /* if(csr & USB_OUT_CSR1_OUT_PKT_RDY) */ | |
758 | usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1); | |
759 | break; | |
760 | } | |
761 | } | |
762 | ||
763 | /** | |
764 | * lh7a40x_in_epn - handle IN interrupt | |
765 | */ | |
766 | static void lh7a40x_in_epn(struct lh7a40x_udc *dev, u32 ep_idx, u32 intr) | |
767 | { | |
768 | u32 csr; | |
769 | struct lh7a40x_ep *ep = &dev->ep[ep_idx]; | |
770 | struct lh7a40x_request *req; | |
771 | ||
772 | usb_set_index(ep_idx); | |
773 | ||
774 | csr = usb_read(ep->csr1); | |
775 | DEBUG("%s: %d, csr %x\n", __FUNCTION__, ep_idx, csr); | |
776 | ||
777 | if (csr & USB_IN_CSR1_SENT_STALL) { | |
778 | DEBUG("USB_IN_CSR1_SENT_STALL\n"); | |
779 | usb_set(USB_IN_CSR1_SENT_STALL /*|USB_IN_CSR1_SEND_STALL */ , | |
780 | ep->csr1); | |
781 | return; | |
782 | } | |
783 | ||
784 | if (!ep->desc) { | |
785 | DEBUG("%s: NO EP DESC\n", __FUNCTION__); | |
786 | return; | |
787 | } | |
788 | ||
789 | if (list_empty(&ep->queue)) | |
790 | req = 0; | |
791 | else | |
792 | req = list_entry(ep->queue.next, struct lh7a40x_request, queue); | |
793 | ||
794 | DEBUG("req: %p\n", req); | |
795 | ||
796 | if (!req) | |
797 | return; | |
798 | ||
799 | write_fifo(ep, req); | |
800 | } | |
801 | ||
802 | /* ********************************************************************************************* */ | |
803 | /* Bulk OUT (recv) | |
804 | */ | |
805 | ||
806 | static void lh7a40x_out_epn(struct lh7a40x_udc *dev, u32 ep_idx, u32 intr) | |
807 | { | |
808 | struct lh7a40x_ep *ep = &dev->ep[ep_idx]; | |
809 | struct lh7a40x_request *req; | |
810 | ||
811 | DEBUG("%s: %d\n", __FUNCTION__, ep_idx); | |
812 | ||
813 | usb_set_index(ep_idx); | |
814 | ||
815 | if (ep->desc) { | |
816 | u32 csr; | |
817 | csr = usb_read(ep->csr1); | |
818 | ||
819 | while ((csr = | |
820 | usb_read(ep-> | |
821 | csr1)) & (USB_OUT_CSR1_OUT_PKT_RDY | | |
822 | USB_OUT_CSR1_SENT_STALL)) { | |
823 | DEBUG("%s: %x\n", __FUNCTION__, csr); | |
824 | ||
825 | if (csr & USB_OUT_CSR1_SENT_STALL) { | |
826 | DEBUG("%s: stall sent, flush fifo\n", | |
827 | __FUNCTION__); | |
828 | /* usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1); */ | |
829 | flush(ep); | |
830 | } else if (csr & USB_OUT_CSR1_OUT_PKT_RDY) { | |
831 | if (list_empty(&ep->queue)) | |
832 | req = 0; | |
833 | else | |
834 | req = | |
835 | list_entry(ep->queue.next, | |
836 | struct lh7a40x_request, | |
837 | queue); | |
838 | ||
839 | if (!req) { | |
840 | printk("%s: NULL REQ %d\n", | |
841 | __FUNCTION__, ep_idx); | |
842 | flush(ep); | |
843 | break; | |
844 | } else { | |
845 | read_fifo(ep, req); | |
846 | } | |
847 | } | |
848 | ||
849 | } | |
850 | ||
851 | } else { | |
852 | /* Throw packet away.. */ | |
853 | printk("%s: No descriptor?!?\n", __FUNCTION__); | |
854 | flush(ep); | |
855 | } | |
856 | } | |
857 | ||
858 | static void stop_activity(struct lh7a40x_udc *dev, | |
859 | struct usb_gadget_driver *driver) | |
860 | { | |
861 | int i; | |
862 | ||
863 | /* don't disconnect drivers more than once */ | |
864 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) | |
865 | driver = 0; | |
866 | dev->gadget.speed = USB_SPEED_UNKNOWN; | |
867 | ||
868 | /* prevent new request submissions, kill any outstanding requests */ | |
869 | for (i = 0; i < UDC_MAX_ENDPOINTS; i++) { | |
870 | struct lh7a40x_ep *ep = &dev->ep[i]; | |
871 | ep->stopped = 1; | |
872 | ||
873 | usb_set_index(i); | |
874 | nuke(ep, -ESHUTDOWN); | |
875 | } | |
876 | ||
877 | /* report disconnect; the driver is already quiesced */ | |
878 | if (driver) { | |
879 | spin_unlock(&dev->lock); | |
880 | driver->disconnect(&dev->gadget); | |
881 | spin_lock(&dev->lock); | |
882 | } | |
883 | ||
884 | /* re-init driver-visible data structures */ | |
885 | udc_reinit(dev); | |
886 | } | |
887 | ||
888 | /** Handle USB RESET interrupt | |
889 | */ | |
890 | static void lh7a40x_reset_intr(struct lh7a40x_udc *dev) | |
891 | { | |
892 | #if 0 /* def CONFIG_ARCH_LH7A404 */ | |
893 | /* Does not work always... */ | |
894 | ||
895 | DEBUG("%s: %d\n", __FUNCTION__, dev->usb_address); | |
896 | ||
897 | if (!dev->usb_address) { | |
898 | /*usb_set(USB_RESET_IO, USB_RESET); | |
899 | mdelay(5); | |
900 | usb_clear(USB_RESET_IO, USB_RESET); */ | |
901 | return; | |
902 | } | |
903 | /* Put the USB controller into reset. */ | |
904 | usb_set(USB_RESET_IO, USB_RESET); | |
905 | ||
906 | /* Set Device ID to 0 */ | |
907 | udc_set_address(dev, 0); | |
908 | ||
909 | /* Let PLL2 settle down */ | |
910 | mdelay(5); | |
911 | ||
912 | /* Release the USB controller from reset */ | |
913 | usb_clear(USB_RESET_IO, USB_RESET); | |
914 | ||
915 | /* Re-enable UDC */ | |
916 | udc_enable(dev); | |
917 | ||
918 | #endif | |
919 | dev->gadget.speed = USB_SPEED_FULL; | |
920 | } | |
921 | ||
922 | /* | |
923 | * lh7a40x usb client interrupt handler. | |
924 | */ | |
925 | static irqreturn_t lh7a40x_udc_irq(int irq, void *_dev, struct pt_regs *r) | |
926 | { | |
927 | struct lh7a40x_udc *dev = _dev; | |
928 | ||
929 | DEBUG("\n\n"); | |
930 | ||
931 | spin_lock(&dev->lock); | |
932 | ||
933 | for (;;) { | |
934 | u32 intr_in = usb_read(USB_IN_INT); | |
935 | u32 intr_out = usb_read(USB_OUT_INT); | |
936 | u32 intr_int = usb_read(USB_INT); | |
937 | ||
938 | /* Test also against enable bits.. (lh7a40x errata).. Sigh.. */ | |
939 | u32 in_en = usb_read(USB_IN_INT_EN); | |
940 | u32 out_en = usb_read(USB_OUT_INT_EN); | |
941 | ||
942 | if (!intr_out && !intr_in && !intr_int) | |
943 | break; | |
944 | ||
945 | DEBUG("%s (on state %s)\n", __FUNCTION__, | |
946 | state_names[dev->ep0state]); | |
947 | DEBUG("intr_out = %x\n", intr_out); | |
948 | DEBUG("intr_in = %x\n", intr_in); | |
949 | DEBUG("intr_int = %x\n", intr_int); | |
950 | ||
951 | if (intr_in) { | |
952 | usb_write(intr_in, USB_IN_INT); | |
953 | ||
954 | if ((intr_in & USB_IN_INT_EP1) | |
955 | && (in_en & USB_IN_INT_EP1)) { | |
956 | DEBUG("USB_IN_INT_EP1\n"); | |
957 | lh7a40x_in_epn(dev, 1, intr_in); | |
958 | } | |
959 | if ((intr_in & USB_IN_INT_EP3) | |
960 | && (in_en & USB_IN_INT_EP3)) { | |
961 | DEBUG("USB_IN_INT_EP3\n"); | |
962 | lh7a40x_in_epn(dev, 3, intr_in); | |
963 | } | |
964 | if (intr_in & USB_IN_INT_EP0) { | |
965 | DEBUG("USB_IN_INT_EP0 (control)\n"); | |
966 | lh7a40x_handle_ep0(dev, intr_in); | |
967 | } | |
968 | } | |
969 | ||
970 | if (intr_out) { | |
971 | usb_write(intr_out, USB_OUT_INT); | |
972 | ||
973 | if ((intr_out & USB_OUT_INT_EP2) | |
974 | && (out_en & USB_OUT_INT_EP2)) { | |
975 | DEBUG("USB_OUT_INT_EP2\n"); | |
976 | lh7a40x_out_epn(dev, 2, intr_out); | |
977 | } | |
978 | } | |
979 | ||
980 | if (intr_int) { | |
981 | usb_write(intr_int, USB_INT); | |
982 | ||
983 | if (intr_int & USB_INT_RESET_INT) { | |
984 | lh7a40x_reset_intr(dev); | |
985 | } | |
986 | ||
987 | if (intr_int & USB_INT_RESUME_INT) { | |
988 | DEBUG("USB resume\n"); | |
989 | ||
990 | if (dev->gadget.speed != USB_SPEED_UNKNOWN | |
991 | && dev->driver | |
992 | && dev->driver->resume | |
993 | && is_usb_connected()) { | |
994 | dev->driver->resume(&dev->gadget); | |
995 | } | |
996 | } | |
997 | ||
998 | if (intr_int & USB_INT_SUSPEND_INT) { | |
999 | DEBUG("USB suspend%s\n", | |
1000 | is_usb_connected()? "" : "+disconnect"); | |
1001 | if (!is_usb_connected()) { | |
1002 | stop_activity(dev, dev->driver); | |
1003 | } else if (dev->gadget.speed != | |
1004 | USB_SPEED_UNKNOWN && dev->driver | |
1005 | && dev->driver->suspend) { | |
1006 | dev->driver->suspend(&dev->gadget); | |
1007 | } | |
1008 | } | |
1009 | ||
1010 | } | |
1011 | } | |
1012 | ||
1013 | spin_unlock(&dev->lock); | |
1014 | ||
1015 | return IRQ_HANDLED; | |
1016 | } | |
1017 | ||
1018 | static int lh7a40x_ep_enable(struct usb_ep *_ep, | |
1019 | const struct usb_endpoint_descriptor *desc) | |
1020 | { | |
1021 | struct lh7a40x_ep *ep; | |
1022 | struct lh7a40x_udc *dev; | |
1023 | unsigned long flags; | |
1024 | ||
1025 | DEBUG("%s, %p\n", __FUNCTION__, _ep); | |
1026 | ||
1027 | ep = container_of(_ep, struct lh7a40x_ep, ep); | |
1028 | if (!_ep || !desc || ep->desc || _ep->name == ep0name | |
1029 | || desc->bDescriptorType != USB_DT_ENDPOINT | |
1030 | || ep->bEndpointAddress != desc->bEndpointAddress | |
1031 | || ep_maxpacket(ep) < le16_to_cpu(desc->wMaxPacketSize)) { | |
1032 | DEBUG("%s, bad ep or descriptor\n", __FUNCTION__); | |
1033 | return -EINVAL; | |
1034 | } | |
1035 | ||
1036 | /* xfer types must match, except that interrupt ~= bulk */ | |
1037 | if (ep->bmAttributes != desc->bmAttributes | |
1038 | && ep->bmAttributes != USB_ENDPOINT_XFER_BULK | |
1039 | && desc->bmAttributes != USB_ENDPOINT_XFER_INT) { | |
1040 | DEBUG("%s, %s type mismatch\n", __FUNCTION__, _ep->name); | |
1041 | return -EINVAL; | |
1042 | } | |
1043 | ||
1044 | /* hardware _could_ do smaller, but driver doesn't */ | |
1045 | if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK | |
1046 | && le16_to_cpu(desc->wMaxPacketSize) != ep_maxpacket(ep)) | |
1047 | || !desc->wMaxPacketSize) { | |
1048 | DEBUG("%s, bad %s maxpacket\n", __FUNCTION__, _ep->name); | |
1049 | return -ERANGE; | |
1050 | } | |
1051 | ||
1052 | dev = ep->dev; | |
1053 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) { | |
1054 | DEBUG("%s, bogus device state\n", __FUNCTION__); | |
1055 | return -ESHUTDOWN; | |
1056 | } | |
1057 | ||
1058 | spin_lock_irqsave(&ep->dev->lock, flags); | |
1059 | ||
1060 | ep->stopped = 0; | |
1061 | ep->desc = desc; | |
1062 | ep->pio_irqs = 0; | |
1063 | ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize); | |
1064 | ||
d5ec3349 FBH |
1065 | spin_unlock_irqrestore(&ep->dev->lock, flags); |
1066 | ||
1da177e4 LT |
1067 | /* Reset halt state (does flush) */ |
1068 | lh7a40x_set_halt(_ep, 0); | |
1069 | ||
1da177e4 LT |
1070 | DEBUG("%s: enabled %s\n", __FUNCTION__, _ep->name); |
1071 | return 0; | |
1072 | } | |
1073 | ||
1074 | /** Disable EP | |
1075 | * NOTE: Sets INDEX register | |
1076 | */ | |
1077 | static int lh7a40x_ep_disable(struct usb_ep *_ep) | |
1078 | { | |
1079 | struct lh7a40x_ep *ep; | |
1080 | unsigned long flags; | |
1081 | ||
1082 | DEBUG("%s, %p\n", __FUNCTION__, _ep); | |
1083 | ||
1084 | ep = container_of(_ep, struct lh7a40x_ep, ep); | |
1085 | if (!_ep || !ep->desc) { | |
1086 | DEBUG("%s, %s not enabled\n", __FUNCTION__, | |
1087 | _ep ? ep->ep.name : NULL); | |
1088 | return -EINVAL; | |
1089 | } | |
1090 | ||
1091 | spin_lock_irqsave(&ep->dev->lock, flags); | |
1092 | ||
1093 | usb_set_index(ep_index(ep)); | |
1094 | ||
1095 | /* Nuke all pending requests (does flush) */ | |
1096 | nuke(ep, -ESHUTDOWN); | |
1097 | ||
1098 | /* Disable ep IRQ */ | |
1099 | pio_irq_disable(ep_index(ep)); | |
1100 | ||
1101 | ep->desc = 0; | |
1102 | ep->stopped = 1; | |
1103 | ||
1104 | spin_unlock_irqrestore(&ep->dev->lock, flags); | |
1105 | ||
1106 | DEBUG("%s: disabled %s\n", __FUNCTION__, _ep->name); | |
1107 | return 0; | |
1108 | } | |
1109 | ||
1110 | static struct usb_request *lh7a40x_alloc_request(struct usb_ep *ep, | |
55016f10 | 1111 | gfp_t gfp_flags) |
1da177e4 LT |
1112 | { |
1113 | struct lh7a40x_request *req; | |
1114 | ||
1115 | DEBUG("%s, %p\n", __FUNCTION__, ep); | |
1116 | ||
1117 | req = kmalloc(sizeof *req, gfp_flags); | |
1118 | if (!req) | |
1119 | return 0; | |
1120 | ||
1121 | memset(req, 0, sizeof *req); | |
1122 | INIT_LIST_HEAD(&req->queue); | |
1123 | ||
1124 | return &req->req; | |
1125 | } | |
1126 | ||
1127 | static void lh7a40x_free_request(struct usb_ep *ep, struct usb_request *_req) | |
1128 | { | |
1129 | struct lh7a40x_request *req; | |
1130 | ||
1131 | DEBUG("%s, %p\n", __FUNCTION__, ep); | |
1132 | ||
1133 | req = container_of(_req, struct lh7a40x_request, req); | |
1134 | WARN_ON(!list_empty(&req->queue)); | |
1135 | kfree(req); | |
1136 | } | |
1137 | ||
1138 | static void *lh7a40x_alloc_buffer(struct usb_ep *ep, unsigned bytes, | |
55016f10 | 1139 | dma_addr_t * dma, gfp_t gfp_flags) |
1da177e4 LT |
1140 | { |
1141 | char *retval; | |
1142 | ||
1143 | DEBUG("%s (%p, %d, %d)\n", __FUNCTION__, ep, bytes, gfp_flags); | |
1144 | ||
1145 | retval = kmalloc(bytes, gfp_flags & ~(__GFP_DMA | __GFP_HIGHMEM)); | |
1146 | if (retval) | |
1147 | *dma = virt_to_bus(retval); | |
1148 | return retval; | |
1149 | } | |
1150 | ||
1151 | static void lh7a40x_free_buffer(struct usb_ep *ep, void *buf, dma_addr_t dma, | |
1152 | unsigned bytes) | |
1153 | { | |
1154 | DEBUG("%s, %p\n", __FUNCTION__, ep); | |
1155 | kfree(buf); | |
1156 | } | |
1157 | ||
1158 | /** Queue one request | |
1159 | * Kickstart transfer if needed | |
1160 | * NOTE: Sets INDEX register | |
1161 | */ | |
1162 | static int lh7a40x_queue(struct usb_ep *_ep, struct usb_request *_req, | |
55016f10 | 1163 | gfp_t gfp_flags) |
1da177e4 LT |
1164 | { |
1165 | struct lh7a40x_request *req; | |
1166 | struct lh7a40x_ep *ep; | |
1167 | struct lh7a40x_udc *dev; | |
1168 | unsigned long flags; | |
1169 | ||
1170 | DEBUG("\n\n\n%s, %p\n", __FUNCTION__, _ep); | |
1171 | ||
1172 | req = container_of(_req, struct lh7a40x_request, req); | |
1173 | if (unlikely | |
1174 | (!_req || !_req->complete || !_req->buf | |
1175 | || !list_empty(&req->queue))) { | |
1176 | DEBUG("%s, bad params\n", __FUNCTION__); | |
1177 | return -EINVAL; | |
1178 | } | |
1179 | ||
1180 | ep = container_of(_ep, struct lh7a40x_ep, ep); | |
1181 | if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) { | |
1182 | DEBUG("%s, bad ep\n", __FUNCTION__); | |
1183 | return -EINVAL; | |
1184 | } | |
1185 | ||
1186 | dev = ep->dev; | |
1187 | if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) { | |
1188 | DEBUG("%s, bogus device state %p\n", __FUNCTION__, dev->driver); | |
1189 | return -ESHUTDOWN; | |
1190 | } | |
1191 | ||
1192 | DEBUG("%s queue req %p, len %d buf %p\n", _ep->name, _req, _req->length, | |
1193 | _req->buf); | |
1194 | ||
1195 | spin_lock_irqsave(&dev->lock, flags); | |
1196 | ||
1197 | _req->status = -EINPROGRESS; | |
1198 | _req->actual = 0; | |
1199 | ||
1200 | /* kickstart this i/o queue? */ | |
1201 | DEBUG("Add to %d Q %d %d\n", ep_index(ep), list_empty(&ep->queue), | |
1202 | ep->stopped); | |
1203 | if (list_empty(&ep->queue) && likely(!ep->stopped)) { | |
1204 | u32 csr; | |
1205 | ||
1206 | if (unlikely(ep_index(ep) == 0)) { | |
1207 | /* EP0 */ | |
1208 | list_add_tail(&req->queue, &ep->queue); | |
1209 | lh7a40x_ep0_kick(dev, ep); | |
1210 | req = 0; | |
1211 | } else if (ep_is_in(ep)) { | |
1212 | /* EP1 & EP3 */ | |
1213 | usb_set_index(ep_index(ep)); | |
1214 | csr = usb_read(ep->csr1); | |
1215 | pio_irq_enable(ep_index(ep)); | |
1216 | if ((csr & USB_IN_CSR1_FIFO_NOT_EMPTY) == 0) { | |
1217 | if (write_fifo(ep, req) == 1) | |
1218 | req = 0; | |
1219 | } | |
1220 | } else { | |
1221 | /* EP2 */ | |
1222 | usb_set_index(ep_index(ep)); | |
1223 | csr = usb_read(ep->csr1); | |
1224 | pio_irq_enable(ep_index(ep)); | |
1225 | if (!(csr & USB_OUT_CSR1_FIFO_FULL)) { | |
1226 | if (read_fifo(ep, req) == 1) | |
1227 | req = 0; | |
1228 | } | |
1229 | } | |
1230 | } | |
1231 | ||
1232 | /* pio or dma irq handler advances the queue. */ | |
1233 | if (likely(req != 0)) | |
1234 | list_add_tail(&req->queue, &ep->queue); | |
1235 | ||
1236 | spin_unlock_irqrestore(&dev->lock, flags); | |
1237 | ||
1238 | return 0; | |
1239 | } | |
1240 | ||
1241 | /* dequeue JUST ONE request */ | |
1242 | static int lh7a40x_dequeue(struct usb_ep *_ep, struct usb_request *_req) | |
1243 | { | |
1244 | struct lh7a40x_ep *ep; | |
1245 | struct lh7a40x_request *req; | |
1246 | unsigned long flags; | |
1247 | ||
1248 | DEBUG("%s, %p\n", __FUNCTION__, _ep); | |
1249 | ||
1250 | ep = container_of(_ep, struct lh7a40x_ep, ep); | |
1251 | if (!_ep || ep->ep.name == ep0name) | |
1252 | return -EINVAL; | |
1253 | ||
1254 | spin_lock_irqsave(&ep->dev->lock, flags); | |
1255 | ||
1256 | /* make sure it's actually queued on this endpoint */ | |
1257 | list_for_each_entry(req, &ep->queue, queue) { | |
1258 | if (&req->req == _req) | |
1259 | break; | |
1260 | } | |
1261 | if (&req->req != _req) { | |
1262 | spin_unlock_irqrestore(&ep->dev->lock, flags); | |
1263 | return -EINVAL; | |
1264 | } | |
1265 | ||
1266 | done(ep, req, -ECONNRESET); | |
1267 | ||
1268 | spin_unlock_irqrestore(&ep->dev->lock, flags); | |
1269 | return 0; | |
1270 | } | |
1271 | ||
1272 | /** Halt specific EP | |
1273 | * Return 0 if success | |
1274 | * NOTE: Sets INDEX register to EP ! | |
1275 | */ | |
1276 | static int lh7a40x_set_halt(struct usb_ep *_ep, int value) | |
1277 | { | |
1278 | struct lh7a40x_ep *ep; | |
1279 | unsigned long flags; | |
1280 | ||
1281 | ep = container_of(_ep, struct lh7a40x_ep, ep); | |
1282 | if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) { | |
1283 | DEBUG("%s, bad ep\n", __FUNCTION__); | |
1284 | return -EINVAL; | |
1285 | } | |
1286 | ||
1287 | usb_set_index(ep_index(ep)); | |
1288 | ||
1289 | DEBUG("%s, ep %d, val %d\n", __FUNCTION__, ep_index(ep), value); | |
1290 | ||
1291 | spin_lock_irqsave(&ep->dev->lock, flags); | |
1292 | ||
1293 | if (ep_index(ep) == 0) { | |
1294 | /* EP0 */ | |
1295 | usb_set(EP0_SEND_STALL, ep->csr1); | |
1296 | } else if (ep_is_in(ep)) { | |
1297 | u32 csr = usb_read(ep->csr1); | |
1298 | if (value && ((csr & USB_IN_CSR1_FIFO_NOT_EMPTY) | |
1299 | || !list_empty(&ep->queue))) { | |
1300 | /* | |
1301 | * Attempts to halt IN endpoints will fail (returning -EAGAIN) | |
1302 | * if any transfer requests are still queued, or if the controller | |
1303 |