?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
USB: fsl_usb2_udc: Get max ep number from DCCPARAMS register
[linux-2.6/kmemtrace.git] / drivers / usb / gadget / fsl_usb2_udc.c
blobe4aa29fc29392f6e4e92dfafdae27c01142429bb
1 /*
2 * Copyright (C) 2004-2007 Freescale Semicondutor, Inc. All rights reserved.
3 *
4 * Author: Li Yang <leoli@freescale.com>
5 * Jiang Bo <tanya.jiang@freescale.com>
6 *
7 * Description:
8 * Freescale high-speed USB SOC DR module device controller driver.
9 * This can be found on MPC8349E/MPC8313E cpus.
10 * The driver is previously named as mpc_udc. Based on bare board
11 * code from Dave Liu and Shlomi Gridish.
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
17 */
18
19 #undef VERBOSE
20
21 #include <linux/module.h>
22 #include <linux/kernel.h>
23 #include <linux/ioport.h>
24 #include <linux/types.h>
25 #include <linux/errno.h>
26 #include <linux/delay.h>
27 #include <linux/sched.h>
28 #include <linux/slab.h>
29 #include <linux/init.h>
30 #include <linux/timer.h>
31 #include <linux/list.h>
32 #include <linux/interrupt.h>
33 #include <linux/proc_fs.h>
34 #include <linux/mm.h>
35 #include <linux/moduleparam.h>
36 #include <linux/device.h>
37 #include <linux/usb/ch9.h>
38 #include <linux/usb_gadget.h>
39 #include <linux/usb/otg.h>
40 #include <linux/dma-mapping.h>
41 #include <linux/platform_device.h>
42 #include <linux/fsl_devices.h>
43 #include <linux/dmapool.h>
44
45 #include <asm/byteorder.h>
46 #include <asm/io.h>
47 #include <asm/irq.h>
48 #include <asm/system.h>
49 #include <asm/unaligned.h>
50 #include <asm/dma.h>
51 #include <asm/cacheflush.h>
52
53 #include "fsl_usb2_udc.h"
54
55 #define DRIVER_DESC "Freescale High-Speed USB SOC Device Controller driver"
56 #define DRIVER_AUTHOR "Li Yang/Jiang Bo"
57 #define DRIVER_VERSION "Apr 20, 2007"
58
59 #define DMA_ADDR_INVALID (~(dma_addr_t)0)
60
61 static const char driver_name[] = "fsl-usb2-udc";
62 static const char driver_desc[] = DRIVER_DESC;
63
64 volatile static struct usb_dr_device *dr_regs = NULL;
65 volatile static struct usb_sys_interface *usb_sys_regs = NULL;
66
67 /* it is initialized in probe() */
68 static struct fsl_udc *udc_controller = NULL;
69
70 static const struct usb_endpoint_descriptor
71 fsl_ep0_desc = {
72 .bLength = USB_DT_ENDPOINT_SIZE,
73 .bDescriptorType = USB_DT_ENDPOINT,
74 .bEndpointAddress = 0,
75 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
76 .wMaxPacketSize = USB_MAX_CTRL_PAYLOAD,
77 };
78
79 static int fsl_udc_suspend(struct platform_device *pdev, pm_message_t state);
80 static int fsl_udc_resume(struct platform_device *pdev);
81 static void fsl_ep_fifo_flush(struct usb_ep *_ep);
82
83 #ifdef CONFIG_PPC32
84 #define fsl_readl(addr) in_le32(addr)
85 #define fsl_writel(addr, val32) out_le32(val32, addr)
86 #else
87 #define fsl_readl(addr) readl(addr)
88 #define fsl_writel(addr, val32) writel(addr, val32)
89 #endif
90
91 /********************************************************************
92 * Internal Used Function
93 ********************************************************************/
94 /*-----------------------------------------------------------------
95 * done() - retire a request; caller blocked irqs
96 * @status : request status to be set, only works when
97 * request is still in progress.
98 *--------------------------------------------------------------*/
99 static void done(struct fsl_ep *ep, struct fsl_req *req, int status)
100 {
101 struct fsl_udc *udc = NULL;
102 unsigned char stopped = ep->stopped;
103 struct ep_td_struct *curr_td, *next_td;
104 int j;
105
106 udc = (struct fsl_udc *)ep->udc;
107 /* Removed the req from fsl_ep->queue */
108 list_del_init(&req->queue);
109
110 /* req.status should be set as -EINPROGRESS in ep_queue() */
111 if (req->req.status == -EINPROGRESS)
112 req->req.status = status;
113 else
114 status = req->req.status;
115
116 /* Free dtd for the request */
117 next_td = req->head;
118 for (j = 0; j < req->dtd_count; j++) {
119 curr_td = next_td;
120 if (j != req->dtd_count - 1) {
121 next_td = curr_td->next_td_virt;
122 }
123 dma_pool_free(udc->td_pool, curr_td, curr_td->td_dma);
124 }
125
126 if (req->mapped) {
127 dma_unmap_single(ep->udc->gadget.dev.parent,
128 req->req.dma, req->req.length,
129 ep_is_in(ep)
130 ? DMA_TO_DEVICE
131 : DMA_FROM_DEVICE);
132 req->req.dma = DMA_ADDR_INVALID;
133 req->mapped = 0;
134 } else
135 dma_sync_single_for_cpu(ep->udc->gadget.dev.parent,
136 req->req.dma, req->req.length,
137 ep_is_in(ep)
138 ? DMA_TO_DEVICE
139 : DMA_FROM_DEVICE);
140
141 if (status && (status != -ESHUTDOWN))
142 VDBG("complete %s req %p stat %d len %u/%u",
143 ep->ep.name, &req->req, status,
144 req->req.actual, req->req.length);
145
146 ep->stopped = 1;
147
148 spin_unlock(&ep->udc->lock);
149 /* complete() is from gadget layer,
150 * eg fsg->bulk_in_complete() */
151 if (req->req.complete)
152 req->req.complete(&ep->ep, &req->req);
153
154 spin_lock(&ep->udc->lock);
155 ep->stopped = stopped;
156 }
157
158 /*-----------------------------------------------------------------
159 * nuke(): delete all requests related to this ep
160 * called with spinlock held
161 *--------------------------------------------------------------*/
162 static void nuke(struct fsl_ep *ep, int status)
163 {
164 ep->stopped = 1;
165
166 /* Flush fifo */
167 fsl_ep_fifo_flush(&ep->ep);
168
169 /* Whether this eq has request linked */
170 while (!list_empty(&ep->queue)) {
171 struct fsl_req *req = NULL;
172
173 req = list_entry(ep->queue.next, struct fsl_req, queue);
174 done(ep, req, status);
175 }
176 }
177
178 /*------------------------------------------------------------------
179 Internal Hardware related function
180 ------------------------------------------------------------------*/
181
182 static int dr_controller_setup(struct fsl_udc *udc)
183 {
184 unsigned int tmp = 0, portctrl = 0, ctrl = 0;
185 unsigned long timeout;
186 #define FSL_UDC_RESET_TIMEOUT 1000
187
188 /* before here, make sure dr_regs has been initialized */
189 if (!udc)
190 return -EINVAL;
191
192 /* Stop and reset the usb controller */
193 tmp = fsl_readl(&dr_regs->usbcmd);
194 tmp &= ~USB_CMD_RUN_STOP;
195 fsl_writel(tmp, &dr_regs->usbcmd);
196
197 tmp = fsl_readl(&dr_regs->usbcmd);
198 tmp |= USB_CMD_CTRL_RESET;
199 fsl_writel(tmp, &dr_regs->usbcmd);
200
201 /* Wait for reset to complete */
202 timeout = jiffies + FSL_UDC_RESET_TIMEOUT;
203 while (fsl_readl(&dr_regs->usbcmd) & USB_CMD_CTRL_RESET) {
204 if (time_after(jiffies, timeout)) {
205 ERR("udc reset timeout! \n");
206 return -ETIMEDOUT;
207 }
208 cpu_relax();
209 }
210
211 /* Set the controller as device mode */
212 tmp = fsl_readl(&dr_regs->usbmode);
213 tmp |= USB_MODE_CTRL_MODE_DEVICE;
214 /* Disable Setup Lockout */
215 tmp |= USB_MODE_SETUP_LOCK_OFF;
216 fsl_writel(tmp, &dr_regs->usbmode);
217
218 /* Clear the setup status */
219 fsl_writel(0, &dr_regs->usbsts);
220
221 tmp = udc->ep_qh_dma;
222 tmp &= USB_EP_LIST_ADDRESS_MASK;
223 fsl_writel(tmp, &dr_regs->endpointlistaddr);
224
225 VDBG("vir[qh_base] is %p phy[qh_base] is 0x%8x reg is 0x%8x",
226 (int)udc->ep_qh, (int)tmp,
227 fsl_readl(&dr_regs->endpointlistaddr));
228
229 /* Config PHY interface */
230 portctrl = fsl_readl(&dr_regs->portsc1);
231 portctrl &= ~(PORTSCX_PHY_TYPE_SEL & PORTSCX_PORT_WIDTH);
232 switch (udc->phy_mode) {
233 case FSL_USB2_PHY_ULPI:
234 portctrl |= PORTSCX_PTS_ULPI;
235 break;
236 case FSL_USB2_PHY_UTMI_WIDE:
237 portctrl |= PORTSCX_PTW_16BIT;
238 /* fall through */
239 case FSL_USB2_PHY_UTMI:
240 portctrl |= PORTSCX_PTS_UTMI;
241 break;
242 case FSL_USB2_PHY_SERIAL:
243 portctrl |= PORTSCX_PTS_FSLS;
244 break;
245 default:
246 return -EINVAL;
247 }
248 fsl_writel(portctrl, &dr_regs->portsc1);
249
250 /* Config control enable i/o output, cpu endian register */
251 ctrl = __raw_readl(&usb_sys_regs->control);
252 ctrl |= USB_CTRL_IOENB;
253 __raw_writel(ctrl, &usb_sys_regs->control);
254
255 #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE)
256 /* Turn on cache snooping hardware, since some PowerPC platforms
257 * wholly rely on hardware to deal with cache coherent. */
258
259 /* Setup Snooping for all the 4GB space */
260 tmp = SNOOP_SIZE_2GB; /* starts from 0x0, size 2G */
261 __raw_writel(tmp, &usb_sys_regs->snoop1);
262 tmp |= 0x80000000; /* starts from 0x8000000, size 2G */
263 __raw_writel(tmp, &usb_sys_regs->snoop2);
264 #endif
265
266 return 0;
267 }
268
269 /* Enable DR irq and set controller to run state */
270 static void dr_controller_run(struct fsl_udc *udc)
271 {
272 u32 temp;
273
274 /* Enable DR irq reg */
275 temp = USB_INTR_INT_EN | USB_INTR_ERR_INT_EN
276 | USB_INTR_PTC_DETECT_EN | USB_INTR_RESET_EN
277 | USB_INTR_DEVICE_SUSPEND | USB_INTR_SYS_ERR_EN;
278
279 fsl_writel(temp, &dr_regs->usbintr);
280
281 /* Clear stopped bit */
282 udc->stopped = 0;
283
284 /* Set the controller as device mode */
285 temp = fsl_readl(&dr_regs->usbmode);
286 temp |= USB_MODE_CTRL_MODE_DEVICE;
287 fsl_writel(temp, &dr_regs->usbmode);
288
289 /* Set controller to Run */
290 temp = fsl_readl(&dr_regs->usbcmd);
291 temp |= USB_CMD_RUN_STOP;
292 fsl_writel(temp, &dr_regs->usbcmd);
293
294 return;
295 }
296
297 static void dr_controller_stop(struct fsl_udc *udc)
298 {
299 unsigned int tmp;
300
301 /* disable all INTR */
302 fsl_writel(0, &dr_regs->usbintr);
303
304 /* Set stopped bit for isr */
305 udc->stopped = 1;
306
307 /* disable IO output */
308 /* usb_sys_regs->control = 0; */
309
310 /* set controller to Stop */
311 tmp = fsl_readl(&dr_regs->usbcmd);
312 tmp &= ~USB_CMD_RUN_STOP;
313 fsl_writel(tmp, &dr_regs->usbcmd);
314
315 return;
316 }
317
318 void dr_ep_setup(unsigned char ep_num, unsigned char dir, unsigned char ep_type)
319 {
320 unsigned int tmp_epctrl = 0;
321
322 tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
323 if (dir) {
324 if (ep_num)
325 tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
326 tmp_epctrl |= EPCTRL_TX_ENABLE;
327 tmp_epctrl |= ((unsigned int)(ep_type)
328 << EPCTRL_TX_EP_TYPE_SHIFT);
329 } else {
330 if (ep_num)
331 tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
332 tmp_epctrl |= EPCTRL_RX_ENABLE;
333 tmp_epctrl |= ((unsigned int)(ep_type)
334 << EPCTRL_RX_EP_TYPE_SHIFT);
335 }
336
337 fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
338 }
339
340 static void
341 dr_ep_change_stall(unsigned char ep_num, unsigned char dir, int value)
342 {
343 u32 tmp_epctrl = 0;
344
345 tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
346
347 if (value) {
348 /* set the stall bit */
349 if (dir)
350 tmp_epctrl |= EPCTRL_TX_EP_STALL;
351 else
352 tmp_epctrl |= EPCTRL_RX_EP_STALL;
353 } else {
354 /* clear the stall bit and reset data toggle */
355 if (dir) {
356 tmp_epctrl &= ~EPCTRL_TX_EP_STALL;
357 tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
358 } else {
359 tmp_epctrl &= ~EPCTRL_RX_EP_STALL;
360 tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
361 }
362 }
363 fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
364 }
365
366 /* Get stall status of a specific ep
367 Return: 0: not stalled; 1:stalled */
368 static int dr_ep_get_stall(unsigned char ep_num, unsigned char dir)
369 {
370 u32 epctrl;
371
372 epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
373 if (dir)
374 return (epctrl & EPCTRL_TX_EP_STALL) ? 1 : 0;
375 else
376 return (epctrl & EPCTRL_RX_EP_STALL) ? 1 : 0;
377 }
378
379 /********************************************************************
380 Internal Structure Build up functions
381 ********************************************************************/
382
383 /*------------------------------------------------------------------
384 * struct_ep_qh_setup(): set the Endpoint Capabilites field of QH
385 * @zlt: Zero Length Termination Select (1: disable; 0: enable)
386 * @mult: Mult field
387 ------------------------------------------------------------------*/
388 static void struct_ep_qh_setup(struct fsl_udc *udc, unsigned char ep_num,
389 unsigned char dir, unsigned char ep_type,
390 unsigned int max_pkt_len,
391 unsigned int zlt, unsigned char mult)
392 {
393 struct ep_queue_head *p_QH = &udc->ep_qh[2 * ep_num + dir];
394 unsigned int tmp = 0;
395
396 /* set the Endpoint Capabilites in QH */
397 switch (ep_type) {
398 case USB_ENDPOINT_XFER_CONTROL:
399 /* Interrupt On Setup (IOS). for control ep */
400 tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
401 | EP_QUEUE_HEAD_IOS;
402 break;
403 case USB_ENDPOINT_XFER_ISOC:
404 tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
405 | (mult << EP_QUEUE_HEAD_MULT_POS);
406 break;
407 case USB_ENDPOINT_XFER_BULK:
408 case USB_ENDPOINT_XFER_INT:
409 tmp = max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS;
410 break;
411 default:
412 VDBG("error ep type is %d", ep_type);
413 return;
414 }
415 if (zlt)
416 tmp |= EP_QUEUE_HEAD_ZLT_SEL;
417 p_QH->max_pkt_length = cpu_to_le32(tmp);
418
419 return;
420 }
421
422 /* Setup qh structure and ep register for ep0. */
423 static void ep0_setup(struct fsl_udc *udc)
424 {
425 /* the intialization of an ep includes: fields in QH, Regs,
426 * fsl_ep struct */
427 struct_ep_qh_setup(udc, 0, USB_RECV, USB_ENDPOINT_XFER_CONTROL,
428 USB_MAX_CTRL_PAYLOAD, 0, 0);
429 struct_ep_qh_setup(udc, 0, USB_SEND, USB_ENDPOINT_XFER_CONTROL,
430 USB_MAX_CTRL_PAYLOAD, 0, 0);
431 dr_ep_setup(0, USB_RECV, USB_ENDPOINT_XFER_CONTROL);
432 dr_ep_setup(0, USB_SEND, USB_ENDPOINT_XFER_CONTROL);
433
434 return;
435
436 }
437
438 /***********************************************************************
439 Endpoint Management Functions
440 ***********************************************************************/
441
442 /*-------------------------------------------------------------------------
443 * when configurations are set, or when interface settings change
444 * for example the do_set_interface() in gadget layer,
445 * the driver will enable or disable the relevant endpoints
446 * ep0 doesn't use this routine. It is always enabled.
447 -------------------------------------------------------------------------*/
448 static int fsl_ep_enable(struct usb_ep *_ep,
449 const struct usb_endpoint_descriptor *desc)
450 {
451 struct fsl_udc *udc = NULL;
452 struct fsl_ep *ep = NULL;
453 unsigned short max = 0;
454 unsigned char mult = 0, zlt;
455 int retval = -EINVAL;
456 unsigned long flags = 0;
457
458 ep = container_of(_ep, struct fsl_ep, ep);
459
460 /* catch various bogus parameters */
461 if (!_ep || !desc || ep->desc
462 || (desc->bDescriptorType != USB_DT_ENDPOINT))
463 return -EINVAL;
464
465 udc = ep->udc;
466
467 if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN))
468 return -ESHUTDOWN;
469
470 max = le16_to_cpu(desc->wMaxPacketSize);
471
472 /* Disable automatic zlp generation. Driver is reponsible to indicate
473 * explicitly through req->req.zero. This is needed to enable multi-td
474 * request. */
475 zlt = 1;
476
477 /* Assume the max packet size from gadget is always correct */
478 switch (desc->bmAttributes & 0x03) {
479 case USB_ENDPOINT_XFER_CONTROL:
480 case USB_ENDPOINT_XFER_BULK:
481 case USB_ENDPOINT_XFER_INT:
482 /* mult = 0. Execute N Transactions as demonstrated by
483 * the USB variable length packet protocol where N is
484 * computed using the Maximum Packet Length (dQH) and
485 * the Total Bytes field (dTD) */
486 mult = 0;
487 break;
488 case USB_ENDPOINT_XFER_ISOC:
489 /* Calculate transactions needed for high bandwidth iso */
490 mult = (unsigned char)(1 + ((max >> 11) & 0x03));
491 max = max & 0x8ff; /* bit 0~10 */
492 /* 3 transactions at most */
493 if (mult > 3)
494 goto en_done;
495 break;
496 default:
497 goto en_done;
498 }
499
500 spin_lock_irqsave(&udc->lock, flags);
501 ep->ep.maxpacket = max;
502 ep->desc = desc;
503 ep->stopped = 0;
504
505 /* Controller related setup */
506 /* Init EPx Queue Head (Ep Capabilites field in QH
507 * according to max, zlt, mult) */
508 struct_ep_qh_setup(udc, (unsigned char) ep_index(ep),
509 (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
510 ? USB_SEND : USB_RECV),
511 (unsigned char) (desc->bmAttributes
512 & USB_ENDPOINT_XFERTYPE_MASK),
513 max, zlt, mult);
514
515 /* Init endpoint ctrl register */
516 dr_ep_setup((unsigned char) ep_index(ep),
517 (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
518 ? USB_SEND : USB_RECV),
519 (unsigned char) (desc->bmAttributes
520 & USB_ENDPOINT_XFERTYPE_MASK));
521
522 spin_unlock_irqrestore(&udc->lock, flags);
523 retval = 0;
524
525 VDBG("enabled %s (ep%d%s) maxpacket %d",ep->ep.name,
526 ep->desc->bEndpointAddress & 0x0f,
527 (desc->bEndpointAddress & USB_DIR_IN)
528 ? "in" : "out", max);
529 en_done:
530 return retval;
531 }
532
533 /*---------------------------------------------------------------------
534 * @ep : the ep being unconfigured. May not be ep0
535 * Any pending and uncomplete req will complete with status (-ESHUTDOWN)
536 *---------------------------------------------------------------------*/
537 static int fsl_ep_disable(struct usb_ep *_ep)
538 {
539 struct fsl_udc *udc = NULL;
540 struct fsl_ep *ep = NULL;
541 unsigned long flags = 0;
542 u32 epctrl;
543 int ep_num;
544
545 ep = container_of(_ep, struct fsl_ep, ep);
546 if (!_ep || !ep->desc) {
547 VDBG("%s not enabled", _ep ? ep->ep.name : NULL);
548 return -EINVAL;
549 }
550
551 /* disable ep on controller */
552 ep_num = ep_index(ep);
553 epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
554 if (ep_is_in(ep))
555 epctrl &= ~EPCTRL_TX_ENABLE;
556 else
557 epctrl &= ~EPCTRL_RX_ENABLE;
558 fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
559
560 udc = (struct fsl_udc *)ep->udc;
561 spin_lock_irqsave(&udc->lock, flags);
562
563 /* nuke all pending requests (does flush) */
564 nuke(ep, -ESHUTDOWN);
565
566 ep->desc = 0;
567 ep->stopped = 1;
568 spin_unlock_irqrestore(&udc->lock, flags);
569
570 VDBG("disabled %s OK", _ep->name);
571 return 0;
572 }
573
574 /*---------------------------------------------------------------------
575 * allocate a request object used by this endpoint
576 * the main operation is to insert the req->queue to the eq->queue
577 * Returns the request, or null if one could not be allocated
578 *---------------------------------------------------------------------*/
579 static struct usb_request *
580 fsl_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
581 {
582 struct fsl_req *req = NULL;
583
584 req = kzalloc(sizeof *req, gfp_flags);
585 if (!req)
586 return NULL;
587
588 req->req.dma = DMA_ADDR_INVALID;
589 INIT_LIST_HEAD(&req->queue);
590
591 return &req->req;
592 }
593
594 static void fsl_free_request(struct usb_ep *_ep, struct usb_request *_req)
595 {
596 struct fsl_req *req = NULL;
597
598 req = container_of(_req, struct fsl_req, req);
599
600 if (_req)
601 kfree(req);
602 }
603
604 /*------------------------------------------------------------------
605 * Allocate an I/O buffer
606 *---------------------------------------------------------------------*/
607 static void *fsl_alloc_buffer(struct usb_ep *_ep, unsigned bytes,
608 dma_addr_t *dma, gfp_t gfp_flags)
609 {
610 struct fsl_ep *ep;
611
612 if (!_ep)
613 return NULL;
614
615 ep = container_of(_ep, struct fsl_ep, ep);
616
617 return dma_alloc_coherent(ep->udc->gadget.dev.parent,
618 bytes, dma, gfp_flags);
619 }
620
621 /*------------------------------------------------------------------
622 * frees an i/o buffer
623 *---------------------------------------------------------------------*/
624 static void fsl_free_buffer(struct usb_ep *_ep, void *buf,
625 dma_addr_t dma, unsigned bytes)
626 {
627 struct fsl_ep *ep;
628
629 if (!_ep)
630 return;
631
632 ep = container_of(_ep, struct fsl_ep, ep);
633
634 dma_free_coherent(ep->udc->gadget.dev.parent, bytes, buf, dma);
635 }
636
637 /*-------------------------------------------------------------------------*/
638 static int fsl_queue_td(struct fsl_ep *ep, struct fsl_req *req)
639 {
640 int i = ep_index(ep) * 2 + ep_is_in(ep);
641 u32 temp, bitmask, tmp_stat;
642 struct ep_queue_head *dQH = &ep->udc->ep_qh[i];
643
644 /* VDBG("QH addr Register 0x%8x", dr_regs->endpointlistaddr);
645 VDBG("ep_qh[%d] addr is 0x%8x", i, (u32)&(ep->udc->ep_qh[i])); */
646
647 bitmask = ep_is_in(ep)
648 ? (1 << (ep_index(ep) + 16))
649 : (1 << (ep_index(ep)));
650
651 /* check if the pipe is empty */
652 if (!(list_empty(&ep->queue))) {
653 /* Add td to the end */
654 struct fsl_req *lastreq;
655 lastreq = list_entry(ep->queue.prev, struct fsl_req, queue);
656 lastreq->tail->next_td_ptr =
657 cpu_to_le32(req->head->td_dma & DTD_ADDR_MASK);
658 /* Read prime bit, if 1 goto done */
659 if (fsl_readl(&dr_regs->endpointprime) & bitmask)
660 goto out;
661
662 do {
663 /* Set ATDTW bit in USBCMD */
664 temp = fsl_readl(&dr_regs->usbcmd);
665 fsl_writel(temp | USB_CMD_ATDTW, &dr_regs->usbcmd);
666
667 /* Read correct status bit */
668 tmp_stat = fsl_readl(&dr_regs->endptstatus) & bitmask;
669
670 } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_ATDTW));
671
672 /* Write ATDTW bit to 0 */
673 temp = fsl_readl(&dr_regs->usbcmd);
674 fsl_writel(temp & ~USB_CMD_ATDTW, &dr_regs->usbcmd);
675
676 if (tmp_stat)
677 goto out;
678 }
679
680 /* Write dQH next pointer and terminate bit to 0 */
681 temp = req->head->td_dma & EP_QUEUE_HEAD_NEXT_POINTER_MASK;
682 dQH->next_dtd_ptr = cpu_to_le32(temp);
683
684 /* Clear active and halt bit */
685 temp = cpu_to_le32(~(EP_QUEUE_HEAD_STATUS_ACTIVE
686 | EP_QUEUE_HEAD_STATUS_HALT));
687 dQH->size_ioc_int_sts &= temp;
688
689 /* Prime endpoint by writing 1 to ENDPTPRIME */
690 temp = ep_is_in(ep)
691 ? (1 << (ep_index(ep) + 16))
692 : (1 << (ep_index(ep)));
693 fsl_writel(temp, &dr_regs->endpointprime);
694 out:
695 return 0;
696 }
697
698 /* Fill in the dTD structure
699 * @req: request that the transfer belongs to
700 * @length: return actually data length of the dTD
701 * @dma: return dma address of the dTD
702 * @is_last: return flag if it is the last dTD of the request
703 * return: pointer to the built dTD */
704 static struct ep_td_struct *fsl_build_dtd(struct fsl_req *req, unsigned *length,
705 dma_addr_t *dma, int *is_last)
706 {
707 u32 swap_temp;
708 struct ep_td_struct *dtd;
709
710 /* how big will this transfer be? */
711 *length = min(req->req.length - req->req.actual,
712 (unsigned)EP_MAX_LENGTH_TRANSFER);
713
714 dtd = dma_pool_alloc(udc_controller->td_pool, GFP_KERNEL, dma);
715 if (dtd == NULL)
716 return dtd;
717
718 dtd->td_dma = *dma;
719 /* Clear reserved field */
720 swap_temp = cpu_to_le32(dtd->size_ioc_sts);
721 swap_temp &= ~DTD_RESERVED_FIELDS;
722 dtd->size_ioc_sts = cpu_to_le32(swap_temp);
723
724 /* Init all of buffer page pointers */
725 swap_temp = (u32) (req->req.dma + req->req.actual);
726 dtd->buff_ptr0 = cpu_to_le32(swap_temp);
727 dtd->buff_ptr1 = cpu_to_le32(swap_temp + 0x1000);
728 dtd->buff_ptr2 = cpu_to_le32(swap_temp + 0x2000);
729 dtd->buff_ptr3 = cpu_to_le32(swap_temp + 0x3000);
730 dtd->buff_ptr4 = cpu_to_le32(swap_temp + 0x4000);
731
732 req->req.actual += *length;
733
734 /* zlp is needed if req->req.zero is set */
735 if (req->req.zero) {
736 if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0)
737 *is_last = 1;
738 else
739 *is_last = 0;
740 } else if (req->req.length == req->req.actual)
741 *is_last = 1;
742 else
743 *is_last = 0;
744
745 if ((*is_last) == 0)
746 VDBG("multi-dtd request!\n");
747 /* Fill in the transfer size; set active bit */
748 swap_temp = ((*length << DTD_LENGTH_BIT_POS) | DTD_STATUS_ACTIVE);
749
750 /* Enable interrupt for the last dtd of a request */
751 if (*is_last && !req->req.no_interrupt)
752 swap_temp |= DTD_IOC;
753
754 dtd->size_ioc_sts = cpu_to_le32(swap_temp);
755
756 mb();
757
758 VDBG("length = %d address= 0x%x", *length, (int)*dma);
759
760 return dtd;
761 }
762
763 /* Generate dtd chain for a request */
764 static int fsl_req_to_dtd(struct fsl_req *req)
765 {
766 unsigned count;
767 int is_last;
768 int is_first =1;
769 struct ep_td_struct *last_dtd = NULL, *dtd;
770 dma_addr_t dma;
771
772 do {
773 dtd = fsl_build_dtd(req, &count, &dma, &is_last);
774 if (dtd == NULL)
775 return -ENOMEM;
776
777 if (is_first) {
778 is_first = 0;
779 req->head = dtd;
780 } else {
781 last_dtd->next_td_ptr = cpu_to_le32(dma);
782 last_dtd->next_td_virt = dtd;
783 }
784 last_dtd = dtd;
785
786 req->dtd_count++;
787 } while (!is_last);
788
789 dtd->next_td_ptr = cpu_to_le32(DTD_NEXT_TERMINATE);
790
791 req->tail = dtd;
792
793 return 0;
794 }
795
796 /* queues (submits) an I/O request to an endpoint */
797 static int
798 fsl_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
799 {
800 struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
801 struct fsl_req *req = container_of(_req, struct fsl_req, req);
802 struct fsl_udc *udc;
803 unsigned long flags;
804 int is_iso = 0;
805
806 /* catch various bogus parameters */
807 if (!_req || !req->req.complete || !req->req.buf
808 || !list_empty(&req->queue)) {
809 VDBG("%s, bad params\n", __FUNCTION__);
810 return -EINVAL;
811 }
812 if (!_ep || (!ep->desc && ep_index(ep))) {
813 VDBG("%s, bad ep\n", __FUNCTION__);
814 return -EINVAL;
815 }
816 if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
817 if (req->req.length > ep->ep.maxpacket)
818 return -EMSGSIZE;
819 is_iso = 1;
820 }
821
822 udc = ep->udc;
823 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
824 return -ESHUTDOWN;
825
826 req->ep = ep;
827
828 /* map virtual address to hardware */
829 if (req->req.dma == DMA_ADDR_INVALID) {
830 req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
831 req->req.buf,
832 req->req.length, ep_is_in(ep)
833 ? DMA_TO_DEVICE
834 : DMA_FROM_DEVICE);
835 req->mapped = 1;
836 } else {
837 dma_sync_single_for_device(ep->udc->gadget.dev.parent,
838 req->req.dma, req->req.length,
839 ep_is_in(ep)
840 ? DMA_TO_DEVICE
841 : DMA_FROM_DEVICE);
842 req->mapped = 0;
843 }
844
845 req->req.status = -EINPROGRESS;
846 req->req.actual = 0;
847 req->dtd_count = 0;
848
849 spin_lock_irqsave(&udc->lock, flags);
850
851 /* build dtds and push them to device queue */
852 if (!fsl_req_to_dtd(req)) {
853 fsl_queue_td(ep, req);
854 } else {
855 spin_unlock_irqrestore(&udc->lock, flags);
856 return -ENOMEM;
857 }
858
859 /* Update ep0 state */
860 if ((ep_index(ep) == 0))
861 udc->ep0_state = DATA_STATE_XMIT;
862
863 /* irq handler advances the queue */
864 if (req != NULL)
865 list_add_tail(&req->queue, &ep->queue);
866 spin_unlock_irqrestore(&udc->lock, flags);
867
868 return 0;
869 }
870
871 /* dequeues (cancels, unlinks) an I/O request from an endpoint */
872 static int fsl_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
873 {
874 struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
875 struct fsl_req *req;
876 unsigned long flags;
877 int ep_num, stopped, ret = 0;
878 u32 epctrl;
879
880 if (!_ep || !_req)
881 return -EINVAL;
882
883 spin_lock_irqsave(&ep->udc->lock, flags);
884 stopped = ep->stopped;
885
886 /* Stop the ep before we deal with the queue */
887 ep->stopped = 1;
888 ep_num = ep_index(ep);
889 epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
890 if (ep_is_in(ep))
891 epctrl &= ~EPCTRL_TX_ENABLE;
892 else
893 epctrl &= ~EPCTRL_RX_ENABLE;
894 fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
895
896 /* make sure it's actually queued on this endpoint */
897 list_for_each_entry(req, &ep->queue, queue) {
898 if (&req->req == _req)
899 break;
900 }
901 if (&req->req != _req) {
902 ret = -EINVAL;
903 goto out;
904 }
905
906 /* The request is in progress, or completed but not dequeued */
907 if (ep->queue.next == &req->queue) {
908 _req->status = -ECONNRESET;
909 fsl_ep_fifo_flush(_ep); /* flush current transfer */
910
911 /* The request isn't the last request in this ep queue */
912 if (req->queue.next != &ep->queue) {
913 struct ep_queue_head *qh;
914 struct fsl_req *next_req;
915
916 qh = ep->qh;
917 next_req = list_entry(req->queue.next, struct fsl_req,
918 queue);
919
920 /* Point the QH to the first TD of next request */
921 fsl_writel((u32) next_req->head, &qh->curr_dtd_ptr);
922 }
923
924 /* The request hasn't been processed, patch up the TD chain */
925 } else {
926 struct fsl_req *prev_req;
927
928 prev_req = list_entry(req->queue.prev, struct fsl_req, queue);
929 fsl_writel(fsl_readl(&req->tail->next_td_ptr),
930 &prev_req->tail->next_td_ptr);
931
932 }
933
934 done(ep, req, -ECONNRESET);
935
936 /* Enable EP */
937 out: epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
938 if (ep_is_in(ep))
939 epctrl |= EPCTRL_TX_ENABLE;
940 else
941 epctrl |= EPCTRL_RX_ENABLE;
942 fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
943 ep->stopped = stopped;
944
945 spin_unlock_irqrestore(&ep->udc->lock, flags);
946 return ret;
947 }
948
949 /*-------------------------------------------------------------------------*/
950
951 /*-----------------------------------------------------------------
952 * modify the endpoint halt feature
953 * @ep: the non-isochronous endpoint being stalled
954 * @value: 1--set halt 0--clear halt
955 * Returns zero, or a negative error code.
956 *----------------------------------------------------------------*/
957 static int fsl_ep_set_halt(struct usb_ep *_ep, int value)
958 {
959 struct fsl_ep *ep = NULL;
960 unsigned long flags = 0;
961 int status = -EOPNOTSUPP; /* operation not supported */
962 unsigned char ep_dir = 0, ep_num = 0;
963 struct fsl_udc *udc = NULL;
964
965 ep = container_of(_ep, struct fsl_ep, ep);
966 udc = ep->udc;
967 if (!_ep || !ep->desc) {
968 status = -EINVAL;
969 goto out;
970 }
971
972 if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
973 status = -EOPNOTSUPP;
974 goto out;
975 }
976
977 /* Attempt to halt IN ep will fail if any transfer requests
978 * are still queue */
979 if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
980 status = -EAGAIN;
981 goto out;
982 }
983
984 status = 0;
985 ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
986 ep_num = (unsigned char)(ep_index(ep));
987 spin_lock_irqsave(&ep->udc->lock, flags);
988 dr_ep_change_stall(ep_num, ep_dir, value);
989 spin_unlock_irqrestore(&ep->udc->lock, flags);
990
991 if (ep_index(ep) == 0) {
992 udc->ep0_state = WAIT_FOR_SETUP;
993 udc->ep0_dir = 0;
994 }
995 out:
996 VDBG(" %s %s halt stat %d", ep->ep.name,
997 value ? "set" : "clear", status);
998
999 return status;
1000 }
1001
1002 static void fsl_ep_fifo_flush(struct usb_ep *_ep)
1003 {
1004 struct fsl_ep *ep;
1005 int ep_num, ep_dir;
1006 u32 bits;
1007 unsigned long timeout;
1008 #define FSL_UDC_FLUSH_TIMEOUT 1000
1009
1010 if (!_ep) {
1011 return;
1012 } else {
1013 ep = container_of(_ep, struct fsl_ep, ep);
1014 if (!ep->desc)
1015 return;
1016 }
1017 ep_num = ep_index(ep);
1018 ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
1019
1020 if (ep_num == 0)
1021 bits = (1 << 16) | 1;
1022 else if (ep_dir == USB_SEND)
1023 bits = 1 << (16 + ep_num);
1024 else
1025 bits = 1 << ep_num;
1026
1027 timeout = jiffies + FSL_UDC_FLUSH_TIMEOUT;
1028 do {
1029 fsl_writel(bits, &dr_regs->endptflush);
1030
1031 /* Wait until flush complete */
1032 while (fsl_readl(&dr_regs->endptflush)) {
1033 if (time_after(jiffies, timeout)) {
1034 ERR("ep flush timeout\n");
1035 return;
1036 }
1037 cpu_relax();
1038 }
1039 /* See if we need to flush again */
1040 } while (fsl_readl(&dr_regs->endptstatus) & bits);
1041 }
1042
1043 static struct usb_ep_ops fsl_ep_ops = {
1044 .enable = fsl_ep_enable,
1045 .disable = fsl_ep_disable,
1046
1047 .alloc_request = fsl_alloc_request,
1048 .free_request = fsl_free_request,
1049
1050 .alloc_buffer = fsl_alloc_buffer,
1051 .free_buffer = fsl_free_buffer,
1052
1053 .queue = fsl_ep_queue,
1054 .dequeue = fsl_ep_dequeue,
1055
1056 .set_halt = fsl_ep_set_halt,
1057 .fifo_flush = fsl_ep_fifo_flush, /* flush fifo */
1058 };
1059
1060 /*-------------------------------------------------------------------------
1061 Gadget Driver Layer Operations
1062 -------------------------------------------------------------------------*/
1063
1064 /*----------------------------------------------------------------------
1065 * Get the current frame number (from DR frame_index Reg )
1066 *----------------------------------------------------------------------*/
1067 static int fsl_get_frame(struct usb_gadget *gadget)
1068 {
1069 return (int)(fsl_readl(&dr_regs->frindex) & USB_FRINDEX_MASKS);
1070 }
1071
1072 /*-----------------------------------------------------------------------
1073 * Tries to wake up the host connected to this gadget
1074 -----------------------------------------------------------------------*/
1075 static int fsl_wakeup(struct usb_gadget *gadget)
1076 {
1077 struct fsl_udc *udc = container_of(gadget, struct fsl_udc, gadget);
1078 u32 portsc;
1079
1080 /* Remote wakeup feature not enabled by host */
1081 if (!udc->remote_wakeup)
1082 return -ENOTSUPP;
1083
1084 portsc = fsl_readl(&dr_regs->portsc1);
1085 /* not suspended? */
1086 if (!(portsc & PORTSCX_PORT_SUSPEND))
1087 return 0;
1088 /* trigger force resume */
1089 portsc |= PORTSCX_PORT_FORCE_RESUME;
1090 fsl_writel(portsc, &dr_regs->portsc1);
1091 return 0;
1092 }
1093
1094 static int can_pullup(struct fsl_udc *udc)
1095 {
1096 return udc->driver && udc->softconnect && udc->vbus_active;
1097 }
1098
1099 /* Notify controller that VBUS is powered, Called by whatever
1100 detects VBUS sessions */
1101 static int fsl_vbus_session(struct usb_gadget *gadget, int is_active)
1102 {
1103 struct fsl_udc *udc;
1104 unsigned long flags;
1105
1106 udc = container_of(gadget, struct fsl_udc, gadget);
1107 spin_lock_irqsave(&udc->lock, flags);
1108 VDBG("VBUS %s\n", is_active ? "on" : "off");
1109 udc->vbus_active = (is_active != 0);
1110 if (can_pullup(udc))
1111 fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
1112 &dr_regs->usbcmd);
1113 else
1114 fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
1115 &dr_regs->usbcmd);
1116 spin_unlock_irqrestore(&udc->lock, flags);
1117 return 0;
1118 }
1119
1120 /* constrain controller's VBUS power usage
1121 * This call is used by gadget drivers during SET_CONFIGURATION calls,
1122 * reporting how much power the device may consume. For example, this
1123 * could affect how quickly batteries are recharged.
1124 *
1125 * Returns zero on success, else negative errno.
1126 */
1127 static int fsl_vbus_draw(struct usb_gadget *gadget, unsigned mA)
1128 {
1129 #ifdef CONFIG_USB_OTG
1130 struct fsl_udc *udc;
1131
1132 udc = container_of(gadget, struct fsl_udc, gadget);
1133
1134 if (udc->transceiver)
1135 return otg_set_power(udc->transceiver, mA);
1136 #endif
1137 return -ENOTSUPP;
1138 }
1139
1140 /* Change Data+ pullup status
1141 * this func is used by usb_gadget_connect/disconnet
1142 */
1143 static int fsl_pullup(struct usb_gadget *gadget, int is_on)
1144 {
1145 struct fsl_udc *udc;
1146
1147 udc = container_of(gadget, struct fsl_udc, gadget);
1148 udc->softconnect = (is_on != 0);
1149 if (can_pullup(udc))
1150 fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
1151 &dr_regs->usbcmd);
1152 else
1153 fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
1154 &dr_regs->usbcmd);
1155
1156 return 0;
1157 }
1158
1159 /* defined in usb_gadget.h */
1160 static struct usb_gadget_ops fsl_gadget_ops = {
1161 .get_frame = fsl_get_frame,
1162 .wakeup = fsl_wakeup,
1163 /* .set_selfpowered = fsl_set_selfpowered, */ /* Always selfpowered */
1164 .vbus_session = fsl_vbus_session,
1165 .vbus_draw = fsl_vbus_draw,
1166 .pullup = fsl_pullup,
1167 };
1168
1169 /* Set protocol stall on ep0, protocol stall will automatically be cleared
1170 on new transaction */
1171 static void ep0stall(struct fsl_udc *udc)
1172 {
1173 u32 tmp;
1174
1175 /* must set tx and rx to stall at the same time */
1176 tmp = fsl_readl(&dr_regs->endptctrl[0]);
1177 tmp |= EPCTRL_TX_EP_STALL | EPCTRL_RX_EP_STALL;
1178 fsl_writel(tmp, &dr_regs->endptctrl[0]);
1179 udc->ep0_state = WAIT_FOR_SETUP;
1180 udc->ep0_dir = 0;
1181 }
1182
1183 /* Prime a status phase for ep0 */
1184 static int ep0_prime_status(struct fsl_udc *udc, int direction)
1185 {
1186 struct fsl_req *req = udc->status_req;
1187 struct fsl_ep *ep;
1188 int status = 0;
1189
1190 if (direction == EP_DIR_IN)
1191 udc->ep0_dir = USB_DIR_IN;
1192 else
1193 udc->ep0_dir = USB_DIR_OUT;
1194
1195 ep = &udc->eps[0];
1196 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1197
1198 req->ep = ep;
1199 req->req.length = 0;
1200 req->req.status = -EINPROGRESS;
1201 req->req.actual = 0;
1202 req->req.complete = NULL;
1203 req->dtd_count = 0;
1204
1205 if (fsl_req_to_dtd(req) == 0)
1206 status = fsl_queue_td(ep, req);
1207 else
1208 return -ENOMEM;
1209
1210 if (status)
1211 ERR("Can't queue ep0 status request \n");
1212 list_add_tail(&req->queue, &ep->queue);
1213
1214 return status;
1215 }
1216
1217 static inline int udc_reset_ep_queue(struct fsl_udc *udc, u8 pipe)
1218 {
1219 struct fsl_ep *ep = get_ep_by_pipe(udc, pipe);
1220
1221 if (!ep->name)
1222 return 0;
1223
1224 nuke(ep, -ESHUTDOWN);
1225
1226 return 0;
1227 }
1228
1229 /*
1230 * ch9 Set address
1231 */
1232 static void ch9setaddress(struct fsl_udc *udc, u16 value, u16 index, u16 length)
1233 {
1234 /* Save the new address to device struct */
1235 udc->device_address = (u8) value;
1236 /* Update usb state */
1237 udc->usb_state = USB_STATE_ADDRESS;
1238 /* Status phase */
1239 if (ep0_prime_status(udc, EP_DIR_IN))
1240 ep0stall(udc);
1241 }
1242
1243 /*
1244 * ch9 Get status
1245 */
1246 static void ch9getstatus(struct fsl_udc *udc, u8 request_type, u16 value,
1247 u16 index, u16 length)
1248 {
1249 u16 tmp = 0; /* Status, cpu endian */
1250
1251 struct fsl_req *req;
1252 struct fsl_ep *ep;
1253 int status = 0;
1254
1255 ep = &udc->eps[0];
1256
1257 if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1258 /* Get device status */
1259 tmp = 1 << USB_DEVICE_SELF_POWERED;
1260 tmp |= udc->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP;
1261 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
1262 /* Get interface status */
1263 /* We don't have interface information in udc driver */
1264 tmp = 0;
1265 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
1266 /* Get endpoint status */
1267 struct fsl_ep *target_ep;
1268
1269 target_ep = get_ep_by_pipe(udc, get_pipe_by_windex(index));
1270
1271 /* stall if endpoint doesn't exist */
1272 if (!target_ep->desc)
1273 goto stall;
1274 tmp = dr_ep_get_stall(ep_index(target_ep), ep_is_in(target_ep))
1275 << USB_ENDPOINT_HALT;
1276 }
1277
1278 udc->ep0_dir = USB_DIR_IN;
1279 /* Borrow the per device status_req */
1280 req = udc->status_req;
1281 /* Fill in the reqest structure */
1282 *((u16 *) req->req.buf) = cpu_to_le16(tmp);
1283 req->ep = ep;
1284 req->req.length = 2;
1285 req->req.status = -EINPROGRESS;
1286 req->req.actual = 0;
1287 req->req.complete = NULL;
1288 req->dtd_count = 0;
1289
1290 /* prime the data phase */
1291 if ((fsl_req_to_dtd(req) == 0))
1292 status = fsl_queue_td(ep, req);
1293 else /* no mem */
1294 goto stall;
1295
1296 if (status) {
1297 ERR("Can't respond to getstatus request \n");
1298 goto stall;
1299 }
1300 list_add_tail(&req->queue, &ep->queue);
1301 udc->ep0_state = DATA_STATE_XMIT;
1302 return;
1303 stall:
1304 ep0stall(udc);
1305 }
1306
1307 static void setup_received_irq(struct fsl_udc *udc,
1308 struct usb_ctrlrequest *setup)
1309 {
1310 u16 wValue = le16_to_cpu(setup->wValue);
1311 u16 wIndex = le16_to_cpu(setup->wIndex);
1312 u16 wLength = le16_to_cpu(setup->wLength);
1313
1314 udc_reset_ep_queue(udc, 0);
1315
1316 switch (setup->bRequest) {
1317 /* Request that need Data+Status phase from udc */
1318 case USB_REQ_GET_STATUS:
1319 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_STANDARD))
1320 != (USB_DIR_IN | USB_TYPE_STANDARD))
1321 break;
1322 ch9getstatus(udc, setup->bRequestType, wValue, wIndex, wLength);
1323 break;
1324
1325 /* Requests that need Status phase from udc */
1326 case USB_REQ_SET_ADDRESS:
1327 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD
1328 | USB_RECIP_DEVICE))
1329 break;
1330 ch9setaddress(udc, wValue, wIndex, wLength);
1331 break;
1332
1333 /* Handled by udc, no data, status by udc */
1334 case USB_REQ_CLEAR_FEATURE:
1335 case USB_REQ_SET_FEATURE:
1336 { /* status transaction */
1337 int rc = -EOPNOTSUPP;
1338
1339 if ((setup->bRequestType & USB_RECIP_MASK)
1340 == USB_RECIP_ENDPOINT) {
1341 int pipe = get_pipe_by_windex(wIndex);
1342 struct fsl_ep *ep;
1343
1344 if (wValue != 0 || wLength != 0 || pipe > udc->max_ep)
1345 break;
1346 ep = get_ep_by_pipe(udc, pipe);
1347
1348 spin_unlock(&udc->lock);
1349 rc = fsl_ep_set_halt(&ep->ep,
1350 (setup->bRequest == USB_REQ_SET_FEATURE)
1351 ? 1 : 0);
1352 spin_lock(&udc->lock);
1353
1354 } else if ((setup->bRequestType & USB_RECIP_MASK)
1355 == USB_RECIP_DEVICE) {
1356 /* Note: The driver has not include OTG support yet.
1357 * This will be set when OTG support is added */
1358 if (!udc->gadget.is_otg)
1359 break;
1360 else if (setup->bRequest == USB_DEVICE_B_HNP_ENABLE)
1361 udc->gadget.b_hnp_enable = 1;
1362 else if (setup->bRequest == USB_DEVICE_A_HNP_SUPPORT)
1363 udc->gadget.a_hnp_support = 1;
1364 else if (setup->bRequest ==
1365 USB_DEVICE_A_ALT_HNP_SUPPORT)
1366 udc->gadget.a_alt_hnp_support = 1;
1367 rc = 0;
1368 }
1369 if (rc == 0) {
1370 if (ep0_prime_status(udc, EP_DIR_IN))
1371 ep0stall(udc);
1372 }
1373 break;
1374 }
1375 /* Requests handled by gadget */
1376 default:
1377 if (wLength) {
1378 /* Data phase from gadget, status phase from udc */
1379 udc->ep0_dir = (setup->bRequestType & USB_DIR_IN)
1380 ? USB_DIR_IN : USB_DIR_OUT;
1381 spin_unlock(&udc->lock);
1382 if (udc->driver->setup(&udc->gadget,
1383 &udc->local_setup_buff) < 0)
1384 ep0stall(udc);
1385 spin_lock(&udc->lock);
1386 udc->ep0_state = (setup->bRequestType & USB_DIR_IN)
1387 ? DATA_STATE_XMIT : DATA_STATE_RECV;
1388
1389 } else {
1390 /* No data phase, IN status from gadget */
1391 udc->ep0_dir = USB_DIR_IN;
1392 spin_unlock(&udc->lock);
1393 if (udc->driver->setup(&udc->gadget,
1394 &udc->local_setup_buff) < 0)
1395 ep0stall(udc);
1396 spin_lock(&udc->lock);
1397 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1398 }
1399 break;
1400 }
1401 }
1402
1403 /* Process request for Data or Status phase of ep0
1404 * prime status phase if needed */
1405 static void ep0_req_complete(struct fsl_udc *udc, struct fsl_ep *ep0,
1406 struct fsl_req *req)
1407 {
1408 if (udc->usb_state == USB_STATE_ADDRESS) {
1409 /* Set the new address */
1410 u32 new_address = (u32) udc->device_address;
1411 fsl_writel(new_address << USB_DEVICE_ADDRESS_BIT_POS,
1412 &dr_regs->deviceaddr);
1413 }
1414
1415 done(ep0, req, 0);
1416
1417 switch (udc->ep0_state) {
1418 case DATA_STATE_XMIT:
1419 /* receive status phase */
1420 if (ep0_prime_status(udc, EP_DIR_OUT))
1421 ep0stall(udc);
1422 break;
1423 case DATA_STATE_RECV:
1424 /* send status phase */
1425 if (ep0_prime_status(udc, EP_DIR_IN))
1426 ep0stall(udc);
1427 break;
1428 case WAIT_FOR_OUT_STATUS:
1429 udc->ep0_state = WAIT_FOR_SETUP;
1430 break;
1431 case WAIT_FOR_SETUP:
1432 ERR("Unexpect ep0 packets \n");
1433 break;
1434 default:
1435 ep0stall(udc);
1436 break;
1437 }
1438 }
1439
1440 /* Tripwire mechanism to ensure a setup packet payload is extracted without
1441 * being corrupted by another incoming setup packet */
1442 static void tripwire_handler(struct fsl_udc *udc, u8 ep_num, u8 *buffer_ptr)
1443 {
1444 u32 temp;
1445 struct ep_queue_head *qh;
1446
1447 qh = &udc->ep_qh[ep_num * 2 + EP_DIR_OUT];
1448
1449 /* Clear bit in ENDPTSETUPSTAT */
1450 temp = fsl_readl(&dr_regs->endptsetupstat);
1451 fsl_writel(temp | (1 << ep_num), &dr_regs->endptsetupstat);
1452
1453 /* while a hazard exists when setup package arrives */
1454 do {
1455 /* Set Setup Tripwire */
1456 temp = fsl_readl(&dr_regs->usbcmd);
1457 fsl_writel(temp | USB_CMD_SUTW, &dr_regs->usbcmd);
1458
1459 /* Copy the setup packet to local buffer */
1460 memcpy(buffer_ptr, (u8 *) qh->setup_buffer, 8);
1461 } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_SUTW));
1462
1463 /* Clear Setup Tripwire */
1464 temp = fsl_readl(&dr_regs->usbcmd);
1465 fsl_writel(temp & ~USB_CMD_SUTW, &dr_regs->usbcmd);
1466 }
1467
1468 /* process-ep_req(): free the completed Tds for this req */
1469 static int process_ep_req(struct fsl_udc *udc, int pipe,
1470 struct fsl_req *curr_req)
1471 {
1472 struct ep_td_struct *curr_td;
1473 int td_complete, actual, remaining_length, j, tmp;
1474 int status = 0;
1475 int errors = 0;
1476 struct ep_queue_head *curr_qh = &udc->ep_qh[pipe];
1477 int direction = pipe % 2;
1478
1479 curr_td = curr_req->head;
1480 td_complete = 0;
1481 actual = curr_req->req.length;
1482
1483 for (j = 0; j < curr_req->dtd_count; j++) {
1484 remaining_length = (le32_to_cpu(curr_td->size_ioc_sts)
1485 & DTD_PACKET_SIZE)
1486 >> DTD_LENGTH_BIT_POS;
1487 actual -= remaining_length;
1488
1489 if ((errors = le32_to_cpu(curr_td->size_ioc_sts) &
1490 DTD_ERROR_MASK)) {
1491 if (errors & DTD_STATUS_HALTED) {
1492 ERR("dTD error %08x QH=%d\n", errors, pipe);
1493 /* Clear the errors and Halt condition */
1494 tmp = le32_to_cpu(curr_qh->size_ioc_int_sts);
1495 tmp &= ~errors;
1496 curr_qh->size_ioc_int_sts = cpu_to_le32(tmp);
1497 status = -EPIPE;
1498 /* FIXME: continue with next queued TD? */
1499
1500 break;
1501 }
1502 if (errors & DTD_STATUS_DATA_BUFF_ERR) {
1503 VDBG("Transfer overflow");
1504 status = -EPROTO;
1505 break;
1506 } else if (errors & DTD_STATUS_TRANSACTION_ERR) {
1507 VDBG("ISO error");
1508 status = -EILSEQ;
1509 break;
1510 } else
1511 ERR("Unknown error has occured (0x%x)!\r\n",
1512 errors);
1513
1514 } else if (le32_to_cpu(curr_td->size_ioc_sts)
1515 & DTD_STATUS_ACTIVE) {
1516 VDBG("Request not complete");
1517 status = REQ_UNCOMPLETE;
1518 return status;
1519 } else if (remaining_length) {
1520 if (direction) {
1521 VDBG("Transmit dTD remaining length not zero");
1522 status = -EPROTO;
1523 break;
1524 } else {
1525 td_complete++;
1526 break;
1527 }
1528 } else {
1529 td_complete++;
1530 VDBG("dTD transmitted successful ");
1531 }
1532
1533 if (j != curr_req->dtd_count - 1)
1534 curr_td = (struct ep_td_struct *)curr_td->next_td_virt;
1535 }
1536
1537 if (status)
1538 return status;
1539
1540 curr_req->req.actual = actual;
1541
1542 return 0;
1543 }
1544
1545 /* Process a DTD completion interrupt */
1546 static void dtd_complete_irq(struct fsl_udc *udc)
1547 {
1548 u32 bit_pos;
1549 int i, ep_num, direction, bit_mask, status;
1550 struct fsl_ep *curr_ep;
1551 struct fsl_req *curr_req, *temp_req;
1552
1553 /* Clear the bits in the register */
1554 bit_pos = fsl_readl(&dr_regs->endptcomplete);
1555 fsl_writel(bit_pos, &dr_regs->endptcomplete);
1556
1557 if (!bit_pos)
1558 return;
1559
1560 for (i = 0; i < udc->max_ep * 2; i++) {
1561 ep_num = i >> 1;
1562 direction = i % 2;
1563
1564 bit_mask = 1 << (ep_num + 16 * direction);
1565
1566 if (!(bit_pos & bit_mask))
1567 continue;
1568
1569 curr_ep = get_ep_by_pipe(udc, i);
1570
1571 /* If the ep is configured */
1572 if (curr_ep->name == NULL) {
1573 WARN("Invalid EP?");
1574 continue;
1575 }
1576
1577 /* process the req queue until an uncomplete request */
1578 list_for_each_entry_safe(curr_req, temp_req, &curr_ep->queue,
1579 queue) {
1580 status = process_ep_req(udc, i, curr_req);
1581
1582 VDBG("status of process_ep_req= %d, ep = %d",
1583 status, ep_num);
1584 if (status == REQ_UNCOMPLETE)
1585 break;
1586 /* write back status to req */
1587 curr_req->req.status = status;
1588
1589 if (ep_num == 0) {
1590 ep0_req_complete(udc, curr_ep, curr_req);
1591 break;
1592 } else
1593 done(curr_ep, curr_req, status);
1594 }
1595 }
1596 }
1597
1598 /* Process a port change interrupt */
1599 static void port_change_irq(struct fsl_udc *udc)
1600 {
1601 u32 speed;
1602
1603 if (udc->bus_reset)
1604 udc->bus_reset = 0;
1605
1606 /* Bus resetting is finished */
1607 if (!(fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET)) {
1608 /* Get the speed */
1609 speed = (fsl_readl(&dr_regs->portsc1)
1610 & PORTSCX_PORT_SPEED_MASK);
1611 switch (speed) {
1612 case PORTSCX_PORT_SPEED_HIGH:
1613 udc->gadget.speed = USB_SPEED_HIGH;
1614 break;
1615 case PORTSCX_PORT_SPEED_FULL:
1616 udc->gadget.speed = USB_SPEED_FULL;
1617 break;
1618 case PORTSCX_PORT_SPEED_LOW:
1619 udc->gadget.speed = USB_SPEED_LOW;
1620 break;
1621 default:
1622 udc->gadget.speed = USB_SPEED_UNKNOWN;
1623 break;
1624 }
1625 }
1626
1627 /* Update USB state */
1628 if (!udc->resume_state)
1629 udc->usb_state = USB_STATE_DEFAULT;
1630 }
1631
1632 /* Process suspend interrupt */
1633 static void suspend_irq(struct fsl_udc *udc)
1634 {
1635 udc->resume_state = udc->usb_state;
1636 udc->usb_state = USB_STATE_SUSPENDED;
1637
1638 /* report suspend to the driver, serial.c does not support this */
1639 if (udc->driver->suspend)
1640 udc->driver->suspend(&udc->gadget);
1641 }
1642
1643 static void bus_resume(struct fsl_udc *udc)
1644 {
1645 udc->usb_state = udc->resume_state;
1646 udc->resume_state = 0;
1647
1648 /* report resume to the driver, serial.c does not support this */
1649 if (udc->driver->resume)
1650 udc->driver->resume(&udc->gadget);
1651 }
1652
1653 /* Clear up all ep queues */
1654 static int reset_queues(struct fsl_udc *udc)
1655 {
1656 u8 pipe;
1657
1658 for (pipe = 0; pipe < udc->max_pipes; pipe++)
1659 udc_reset_ep_queue(udc, pipe);
1660
1661 /* report disconnect; the driver is already quiesced */
1662 udc->driver->disconnect(&udc->gadget);
1663
1664 return 0;
1665 }
1666
1667 /* Process reset interrupt */
1668 static void reset_irq(struct fsl_udc *udc)
1669 {
1670 u32 temp;
1671 unsigned long timeout;
1672
1673 /* Clear the device address */
1674 temp = fsl_readl(&dr_regs->deviceaddr);
1675 fsl_writel(temp & ~USB_DEVICE_ADDRESS_MASK, &dr_regs->deviceaddr);
1676
1677 udc->device_address = 0;
1678
1679 /* Clear usb state */
1680 udc->resume_state = 0;
1681 udc->ep0_dir = 0;
1682 udc->ep0_state = WAIT_FOR_SETUP;
1683 udc->remote_wakeup = 0; /* default to 0 on reset */
1684 udc->gadget.b_hnp_enable = 0;
1685 udc->gadget.a_hnp_support = 0;
1686 udc->gadget.a_alt_hnp_support = 0;
1687
1688 /* Clear all the setup token semaphores */
1689 temp = fsl_readl(&dr_regs->endptsetupstat);
1690 fsl_writel(temp, &dr_regs->endptsetupstat);
1691
1692 /* Clear all the endpoint complete status bits */
1693 temp = fsl_readl(&dr_regs->endptcomplete);
1694 fsl_writel(temp, &dr_regs->endptcomplete);
1695
1696 timeout = jiffies + 100;
1697 while (fsl_readl(&dr_regs->endpointprime)) {
1698 /* Wait until all endptprime bits cleared */
1699 if (time_after(jiffies, timeout)) {
1700 ERR("Timeout for reset\n");
1701 break;
1702 }
1703 cpu_relax();
1704 }
1705
1706 /* Write 1s to the flush register */
1707 fsl_writel(0xffffffff, &dr_regs->endptflush);
1708
1709 if (fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET) {
1710 VDBG("Bus reset");
1711 /* Bus is reseting */
1712 udc->bus_reset = 1;
1713 /* Reset all the queues, include XD, dTD, EP queue
1714 * head and TR Queue */
1715 reset_queues(udc);
1716 udc->usb_state = USB_STATE_DEFAULT;
1717 } else {
1718 VDBG("Controller reset");
1719 /* initialize usb hw reg except for regs for EP, not
1720 * touch usbintr reg */
1721 dr_controller_setup(udc);
1722
1723 /* Reset all internal used Queues */
1724 reset_queues(udc);
1725
1726 ep0_setup(udc);
1727
1728 /* Enable DR IRQ reg, Set Run bit, change udc state */
1729 dr_controller_run(udc);
1730 udc->usb_state = USB_STATE_ATTACHED;
1731 }
1732 }
1733
1734 /*
1735 * USB device controller interrupt handler
1736 */
1737 static irqreturn_t fsl_udc_irq(int irq, void *_udc)
1738 {
1739 struct fsl_udc *udc = _udc;
1740 u32 irq_src;
1741 irqreturn_t status = IRQ_NONE;
1742 unsigned long flags;
1743
1744 /* Disable ISR for OTG host mode */
1745 if (udc->stopped)
1746 return IRQ_NONE;
1747 spin_lock_irqsave(&udc->lock, flags);
1748 irq_src = fsl_readl(&dr_regs->usbsts) & fsl_readl(&dr_regs->usbintr);
1749 /* Clear notification bits */
1750 fsl_writel(irq_src, &dr_regs->usbsts);
1751
1752 /* VDBG("irq_src [0x%8x]", irq_src); */
1753
1754 /* Need to resume? */
1755 if (udc->usb_state == USB_STATE_SUSPENDED)
1756 if ((fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_SUSPEND) == 0)
1757 bus_resume(udc);
1758
1759 /* USB Interrupt */
1760 if (irq_src & USB_STS_INT) {
1761 VDBG("Packet int");
1762 /* Setup package, we only support ep0 as control ep */
1763 if (fsl_readl(&dr_regs->endptsetupstat) & EP_SETUP_STATUS_EP0) {
1764 tripwire_handler(udc, 0,
1765 (u8 *) (&udc->local_setup_buff));
1766 setup_received_irq(udc, &udc->local_setup_buff);
1767 status = IRQ_HANDLED;
1768 }
1769
1770 /* completion of dtd */
1771 if (fsl_readl(&dr_regs->endptcomplete)) {
1772 dtd_complete_irq(udc);
1773 status = IRQ_HANDLED;
1774 }
1775 }
1776
1777 /* SOF (for ISO transfer) */
1778 if (irq_src & USB_STS_SOF) {
1779 status = IRQ_HANDLED;
1780 }
1781
1782 /* Port Change */
1783 if (irq_src & USB_STS_PORT_CHANGE) {
1784 port_change_irq(udc);
1785 status = IRQ_HANDLED;
1786 }
1787
1788 /* Reset Received */
1789 if (irq_src & USB_STS_RESET) {
1790 reset_irq(udc);
1791 status = IRQ_HANDLED;
1792 }
1793
1794 /* Sleep Enable (Suspend) */
1795 if (irq_src & USB_STS_SUSPEND) {
1796 suspend_irq(udc);
1797 status = IRQ_HANDLED;
1798 }
1799
1800 if (irq_src & (USB_STS_ERR | USB_STS_SYS_ERR)) {
1801 VDBG("Error IRQ %x ", irq_src);
1802 }
1803
1804 spin_unlock_irqrestore(&udc->lock, flags);
1805 return status;
1806 }
1807
1808 /*----------------------------------------------------------------*
1809 * Hook to gadget drivers
1810 * Called by initialization code of gadget drivers
1811 *----------------------------------------------------------------*/
1812 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
1813 {
1814 int retval = -ENODEV;
1815 unsigned long flags = 0;
1816
1817 if (!udc_controller)
1818 return -ENODEV;
1819
1820 if (!driver || (driver->speed != USB_SPEED_FULL
1821 && driver->speed != USB_SPEED_HIGH)
1822 || !driver->bind || !driver->disconnect
1823 || !driver->setup)
1824 return -EINVAL;
1825
1826 if (udc_controller->driver)
1827 return -EBUSY;
1828
1829 /* lock is needed but whether should use this lock or another */
1830 spin_lock_irqsave(&udc_controller->lock, flags);
1831
1832 driver->driver.bus = 0;
1833 /* hook up the driver */
1834 udc_controller->driver = driver;
1835 udc_controller->gadget.dev.driver = &driver->driver;
1836 spin_unlock_irqrestore(&udc_controller->lock, flags);
1837
1838 /* bind udc driver to gadget driver */
1839 retval = driver->bind(&udc_controller->gadget);
1840 if (retval) {
1841 VDBG("bind to %s --> %d", driver->driver.name, retval);
1842 udc_controller->gadget.dev.driver = 0;
1843 udc_controller->driver = 0;
1844 goto out;
1845 }
1846
1847 /* Enable DR IRQ reg and Set usbcmd reg Run bit */
1848 dr_controller_run(udc_controller);
1849 udc_controller->usb_state = USB_STATE_ATTACHED;
1850 udc_controller->ep0_state = WAIT_FOR_SETUP;
1851 udc_controller->ep0_dir = 0;
1852 printk(KERN_INFO "%s: bind to driver %s \n",
1853 udc_controller->gadget.name, driver->driver.name);
1854
1855 out:
1856 if (retval)
1857 printk("retval %d \n", retval);
1858 return retval;
1859 }
1860 EXPORT_SYMBOL(usb_gadget_register_driver);
1861
1862 /* Disconnect from gadget driver */
1863 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1864 {
1865 struct fsl_ep *loop_ep;
1866 unsigned long flags;
1867
1868 if (!udc_controller)
1869 return -ENODEV;
1870
1871 if (!driver || driver != udc_controller->driver || !driver->unbind)
1872 return -EINVAL;
1873
1874 #ifdef CONFIG_USB_OTG
1875 if (udc_controller->transceiver)
1876 (void)otg_set_peripheral(udc_controller->transceiver, 0);
1877 #endif
1878
1879 /* stop DR, disable intr */
1880 dr_controller_stop(udc_controller);
1881
1882 /* in fact, no needed */
1883 udc_controller->usb_state = USB_STATE_ATTACHED;
1884 udc_controller->ep0_state = WAIT_FOR_SETUP;
1885 udc_controller->ep0_dir = 0;
1886
1887 /* stand operation */
1888 spin_lock_irqsave(&udc_controller->lock, flags);
1889 udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
1890 nuke(&udc_controller->eps[0], -ESHUTDOWN);
1891 list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
1892 ep.ep_list)
1893 nuke(loop_ep, -ESHUTDOWN);
1894 spin_unlock_irqrestore(&udc_controller->lock, flags);
1895
1896 /* unbind gadget and unhook driver. */
1897 driver->unbind(&udc_controller->gadget);
1898 udc_controller->gadget.dev.driver = 0;
1899 udc_controller->driver = 0;
1900
1901 printk("unregistered gadget driver '%s'\r\n", driver->driver.name);
1902 return 0;
1903 }
1904 EXPORT_SYMBOL(usb_gadget_unregister_driver);
1905
1906 /*-------------------------------------------------------------------------
1907 PROC File System Support
1908 -------------------------------------------------------------------------*/
1909 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1910
1911 #include <linux/seq_file.h>
1912
1913 static const char proc_filename[] = "driver/fsl_usb2_udc";
1914
1915 static int fsl_proc_read(char *page, char **start, off_t off, int count,
1916 int *eof, void *_dev)
1917 {
1918 char *buf = page;
1919 char *next = buf;
1920 unsigned size = count;
1921 unsigned long flags;
1922 int t, i;
1923 u32 tmp_reg;
1924 struct fsl_ep *ep = NULL;
1925 struct fsl_req *req;
1926
1927 struct fsl_udc *udc = udc_controller;
1928 if (off != 0)
1929 return 0;
1930
1931 spin_lock_irqsave(&udc->lock, flags);
1932
1933 /* ------basic driver infomation ---- */
1934 t = scnprintf(next, size,
1935 DRIVER_DESC "\n"
1936 "%s version: %s\n"
1937 "Gadget driver: %s\n\n",
1938 driver_name, DRIVER_VERSION,
1939 udc->driver ? udc->driver->driver.name : "(none)");
1940 size -= t;
1941 next += t;
1942
1943 /* ------ DR Registers ----- */
1944 tmp_reg = fsl_readl(&dr_regs->usbcmd);
1945 t = scnprintf(next, size,
1946 "USBCMD reg:\n"
1947 "SetupTW: %d\n"
1948 "Run/Stop: %s\n\n",
1949 (tmp_reg & USB_CMD_SUTW) ? 1 : 0,
1950 (tmp_reg & USB_CMD_RUN_STOP) ? "Run" : "Stop");
1951 size -= t;
1952 next += t;
1953
1954 tmp_reg = fsl_readl(&dr_regs->usbsts);
1955 t = scnprintf(next, size,
1956 "USB Status Reg:\n"
1957 "Dr Suspend: %d" "Reset Received: %d" "System Error: %s"
1958 "USB Error Interrupt: %s\n\n",
1959 (tmp_reg & USB_STS_SUSPEND) ? 1 : 0,
1960 (tmp_reg & USB_STS_RESET) ? 1 : 0,
1961 (tmp_reg & USB_STS_SYS_ERR) ? "Err" : "Normal",
1962 (tmp_reg & USB_STS_ERR) ? "Err detected" : "No err");
1963 size -= t;
1964 next += t;
1965
1966 tmp_reg = fsl_readl(&dr_regs->usbintr);
1967 t = scnprintf(next, size,
1968 "USB Intrrupt Enable Reg:\n"
1969 "Sleep Enable: %d" "SOF Received Enable: %d"
1970 "Reset Enable: %d\n"
1971 "System Error Enable: %d"
1972 "Port Change Dectected Enable: %d\n"
1973 "USB Error Intr Enable: %d" "USB Intr Enable: %d\n\n",
1974 (tmp_reg & USB_INTR_DEVICE_SUSPEND) ? 1 : 0,
1975 (tmp_reg & USB_INTR_SOF_EN) ? 1 : 0,
1976 (tmp_reg & USB_INTR_RESET_EN) ? 1 : 0,
1977 (tmp_reg & USB_INTR_SYS_ERR_EN) ? 1 : 0,
1978 (tmp_reg & USB_INTR_PTC_DETECT_EN) ? 1 : 0,
1979 (tmp_reg & USB_INTR_ERR_INT_EN) ? 1 : 0,
1980 (tmp_reg & USB_INTR_INT_EN) ? 1 : 0);
1981 size -= t;
1982 next += t;
1983
1984 tmp_reg = fsl_readl(&dr_regs->frindex);
1985 t = scnprintf(next, size,
1986 "USB Frame Index Reg:" "Frame Number is 0x%x\n\n",
1987 (tmp_reg & USB_FRINDEX_MASKS));
1988 size -= t;
1989 next += t;
1990
1991 tmp_reg = fsl_readl(&dr_regs->deviceaddr);
1992 t = scnprintf(next, size,
1993 "USB Device Address Reg:" "Device Addr is 0x%x\n\n",
1994 (tmp_reg & USB_DEVICE_ADDRESS_MASK));
1995 size -= t;
1996 next += t;
1997
1998 tmp_reg = fsl_readl(&dr_regs->endpointlistaddr);
1999 t = scnprintf(next, size,
2000 "USB Endpoint List Address Reg:"
2001 "Device Addr is 0x%x\n\n",
2002 (tmp_reg & USB_EP_LIST_ADDRESS_MASK));
2003 size -= t;
2004 next += t;
2005
2006 tmp_reg = fsl_readl(&dr_regs->portsc1);
2007 t = scnprintf(next, size,
2008 "USB Port Status&Control Reg:\n"
2009 "Port Transceiver Type : %s" "Port Speed: %s \n"
2010 "PHY Low Power Suspend: %s" "Port Reset: %s"
2011 "Port Suspend Mode: %s \n" "Over-current Change: %s"
2012 "Port Enable/Disable Change: %s\n"
2013 "Port Enabled/Disabled: %s"
2014 "Current Connect Status: %s\n\n", ( {
2015 char *s;
2016 switch (tmp_reg & PORTSCX_PTS_FSLS) {
2017 case PORTSCX_PTS_UTMI:
2018 s = "UTMI"; break;
2019 case PORTSCX_PTS_ULPI:
2020 s = "ULPI "; break;
2021 case PORTSCX_PTS_FSLS:
2022 s = "FS/LS Serial"; break;
2023 default:
2024 s = "None"; break;
2025 }
2026 s;} ), ( {
2027 char *s;
2028 switch (tmp_reg & PORTSCX_PORT_SPEED_UNDEF) {
2029 case PORTSCX_PORT_SPEED_FULL:
2030 s = "Full Speed"; break;
2031 case PORTSCX_PORT_SPEED_LOW:
2032 s = "Low Speed"; break;
2033 case PORTSCX_PORT_SPEED_HIGH:
2034 s = "High Speed"; break;
2035 default:
2036 s = "Undefined"; break;
2037 }
2038 s;
2039 } ),
2040 (tmp_reg & PORTSCX_PHY_LOW_POWER_SPD) ?
2041 "Normal PHY mode" : "Low power mode",
2042 (tmp_reg & PORTSCX_PORT_RESET) ? "In Reset" :
2043 "Not in Reset",
2044 (tmp_reg & PORTSCX_PORT_SUSPEND) ? "In " : "Not in",
2045 (tmp_reg & PORTSCX_OVER_CURRENT_CHG) ? "Dected" :
2046 "No",
2047 (tmp_reg & PORTSCX_PORT_EN_DIS_CHANGE) ? "Disable" :
2048 "Not change",
2049 (tmp_reg & PORTSCX_PORT_ENABLE) ? "Enable" :
2050 "Not correct",
2051 (tmp_reg & PORTSCX_CURRENT_CONNECT_STATUS) ?
2052 "Attached" : "Not-Att");
2053 size -= t;
2054 next += t;
2055
2056 tmp_reg = fsl_readl(&dr_regs->usbmode);
2057 t = scnprintf(next, size,
2058 "USB Mode Reg:" "Controller Mode is : %s\n\n", ( {
2059 char *s;
2060 switch (tmp_reg & USB_MODE_CTRL_MODE_HOST) {
2061 case USB_MODE_CTRL_MODE_IDLE:
2062 s = "Idle"; break;
2063 case USB_MODE_CTRL_MODE_DEVICE:
2064 s = "Device Controller"; break;
2065 case USB_MODE_CTRL_MODE_HOST:
2066 s = "Host Controller"; break;
2067 default:
2068 s = "None"; break;
2069 }
2070 s;
2071 } ));
2072 size -= t;
2073 next += t;
2074
2075 tmp_reg = fsl_readl(&dr_regs->endptsetupstat);
2076 t = scnprintf(next, size,
2077 "Endpoint Setup Status Reg:" "SETUP on ep 0x%x\n\n",
2078 (tmp_reg & EP_SETUP_STATUS_MASK));
2079 size -= t;
2080 next += t;
2081
2082 for (i = 0; i < udc->max_ep / 2; i++) {
2083 tmp_reg = fsl_readl(&dr_regs->endptctrl[i]);
2084 t = scnprintf(next, size, "EP Ctrl Reg [0x%x]: = [0x%x]\n",
2085 i, tmp_reg);
2086 size -= t;
2087 next += t;
2088 }
2089 tmp_reg = fsl_readl(&dr_regs->endpointprime);
2090 t = scnprintf(next, size, "EP Prime Reg = [0x%x]\n", tmp_reg);
2091 size -= t;
2092 next += t;
2093
2094 tmp_reg = usb_sys_regs->snoop1;
2095 t = scnprintf(next, size, "\nSnoop1 Reg : = [0x%x]\n\n", tmp_reg);
2096 size -= t;
2097 next += t;
2098
2099 tmp_reg = usb_sys_regs->control;
2100 t = scnprintf(next, size, "General Control Reg : = [0x%x]\n\n",
2101 tmp_reg);
2102 size -= t;
2103 next += t;
2104
2105 /* ------fsl_udc, fsl_ep, fsl_request structure information ----- */
2106 ep = &udc->eps[0];
2107 t = scnprintf(next, size, "For %s Maxpkt is 0x%x index is 0x%x\n",
2108 ep->ep.name, ep_maxpacket(ep), ep_index(ep));
2109 size -= t;
2110 next += t;
2111
2112 if (list_empty(&ep->queue)) {
2113 t = scnprintf(next, size, "its req queue is empty\n\n");
2114 size -= t;
2115 next += t;
2116 } else {
2117 list_for_each_entry(req, &ep->queue, queue) {
2118 t = scnprintf(next, size,
2119 "req %p actual 0x%x length 0x%x buf %p\n",
2120 &req->req, req->req.actual,
2121 req->req.length, req->req.buf);
2122 size -= t;
2123 next += t;
2124 }
2125 }
2126 /* other gadget->eplist ep */
2127 list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
2128 if (ep->desc) {
2129 t = scnprintf(next, size,
2130 "\nFor %s Maxpkt is 0x%x "
2131 "index is 0x%x\n",
2132 ep->ep.name, ep_maxpacket(ep),
2133 ep_index(ep));
2134 size -= t;
2135 next += t;
2136
2137 if (list_empty(&ep->queue)) {
2138 t = scnprintf(next, size,
2139 "its req queue is empty\n\n");
2140 size -= t;
2141 next += t;
2142 } else {
2143 list_for_each_entry(req, &ep->queue, queue) {
2144 t = scnprintf(next, size,
2145 "req %p actual 0x%x length"
2146 "0x%x buf %p\n",
2147 &req->req, req->req.actual,
2148 req->req.length, req->req.buf);
2149 size -= t;
2150 next += t;
2151 } /* end for each_entry of ep req */
2152 } /* end for else */
2153 } /* end for if(ep->queue) */
2154 } /* end (ep->desc) */
2155
2156 spin_unlock_irqrestore(&udc->lock, flags);
2157
2158 *eof = 1;
2159 return count - size;
2160 }
2161
2162 #define create_proc_file() create_proc_read_entry(proc_filename, \
2163 0, NULL, fsl_proc_read, NULL)
2164
2165 #define remove_proc_file() remove_proc_entry(proc_filename, NULL)
2166
2167 #else /* !CONFIG_USB_GADGET_DEBUG_FILES */
2168
2169 #define create_proc_file() do {} while (0)
2170 #define remove_proc_file() do {} while (0)
2171
2172 #endif /* CONFIG_USB_GADGET_DEBUG_FILES */
2173
2174 /*-------------------------------------------------------------------------*/
2175
2176 /* Release udc structures */
2177 static void fsl_udc_release(struct device *dev)
2178 {
2179 complete(udc_controller->done);
2180 dma_free_coherent(dev, udc_controller->ep_qh_size,
2181 udc_controller->ep_qh, udc_controller->ep_qh_dma);
2182 kfree(udc_controller);
2183 }
2184
2185 /******************************************************************
2186 Internal structure setup functions
2187 *******************************************************************/
2188 /*------------------------------------------------------------------
2189 * init resource for globle controller
2190 * Return the udc handle on success or NULL on failure
2191 ------------------------------------------------------------------*/
2192 static int __init struct_udc_setup(struct fsl_udc *udc,
2193 struct platform_device *pdev)
2194 {
2195 struct fsl_usb2_platform_data *pdata;
2196 size_t size;
2197
2198 pdata = pdev->dev.platform_data;
2199 udc->phy_mode = pdata->phy_mode;
2200
2201 udc->eps = kzalloc(sizeof(struct fsl_ep) * udc->max_ep, GFP_KERNEL);
2202 if (!udc->eps) {
2203 ERR("malloc fsl_ep failed\n");
2204 return -1;
2205 }
2206
2207 /* initialized QHs, take care of alignment */
2208 size = udc->max_ep * sizeof(struct ep_queue_head);
2209 if (size < QH_ALIGNMENT)
2210 size = QH_ALIGNMENT;
2211 else if ((size % QH_ALIGNMENT) != 0) {
2212 size += QH_ALIGNMENT + 1;
2213 size &= ~(QH_ALIGNMENT - 1);
2214 }
2215 udc->ep_qh = dma_alloc_coherent(&pdev->dev, size,
2216 &udc->ep_qh_dma, GFP_KERNEL);
2217 if (!udc->ep_qh) {
2218 ERR("malloc QHs for udc failed\n");
2219 kfree(udc->eps);
2220 return -1;
2221 }
2222
2223 udc->ep_qh_size = size;
2224
2225 /* Initialize ep0 status request structure */
2226 /* FIXME: fsl_alloc_request() ignores ep argument */
2227 udc->status_req = container_of(fsl_alloc_request(NULL, GFP_KERNEL),
2228 struct fsl_req, req);
2229 /* allocate a small amount of memory to get valid address */
2230 udc->status_req->req.buf = kmalloc(8, GFP_KERNEL);
2231 udc->status_req->req.dma = virt_to_phys(udc->status_req->req.buf);
2232
2233 udc->resume_state = USB_STATE_NOTATTACHED;
2234 udc->usb_state = USB_STATE_POWERED;
2235 udc->ep0_dir = 0;
2236 udc->remote_wakeup = 0; /* default to 0 on reset */
2237 spin_lock_init(&udc->lock);
2238
2239 return 0;
2240 }
2241
2242 /*----------------------------------------------------------------
2243 * Setup the fsl_ep struct for eps
2244 * Link fsl_ep->ep to gadget->ep_list
2245 * ep0out is not used so do nothing here
2246 * ep0in should be taken care
2247 *--------------------------------------------------------------*/
2248 static int __init struct_ep_setup(struct fsl_udc *udc, unsigned char index,
2249 char *name, int link)
2250 {
2251 struct fsl_ep *ep = &udc->eps[index];
2252
2253 ep->udc = udc;
2254 strcpy(ep->name, name);
2255 ep->ep.name = ep->name;
2256
2257 ep->ep.ops = &fsl_ep_ops;
2258 ep->stopped = 0;
2259
2260 /* for ep0: maxP defined in desc
2261 * for other eps, maxP is set by epautoconfig() called by gadget layer
2262 */
2263 ep->ep.maxpacket = (unsigned short) ~0;
2264
2265 /* the queue lists any req for this ep */
2266 INIT_LIST_HEAD(&ep->queue);
2267
2268 /* gagdet.ep_list used for ep_autoconfig so no ep0 */
2269 if (link)
2270 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2271 ep->gadget = &udc->gadget;
2272 ep->qh = &udc->ep_qh[index];
2273
2274 return 0;
2275 }
2276
2277 /* Driver probe function
2278 * all intialization operations implemented here except enabling usb_intr reg
2279 * board setup should have been done in the platform code
2280 */
2281 static int __init fsl_udc_probe(struct platform_device *pdev)
2282 {
2283 struct resource *res;
2284 int ret = -ENODEV;
2285 unsigned int i;
2286 u32 dccparams;
2287
2288 if (strcmp(pdev->name, driver_name)) {
2289 VDBG("Wrong device\n");
2290 return -ENODEV;
2291 }
2292
2293 udc_controller = kzalloc(sizeof(struct fsl_udc), GFP_KERNEL);
2294 if (udc_controller == NULL) {
2295 ERR("malloc udc failed\n");
2296 return -ENOMEM;
2297 }
2298
2299 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2300 if (!res) {
2301 kfree(udc_controller);
2302 return -ENXIO;
2303 }
2304
2305 if (!request_mem_region(res->start, res->end - res->start + 1,
2306 driver_name)) {
2307 ERR("request mem region for %s failed \n", pdev->name);
2308 kfree(udc_controller);
2309 return -EBUSY;
2310 }
2311
2312 dr_regs = ioremap(res->start, res->end - res->start + 1);
2313 if (!dr_regs) {
2314 ret = -ENOMEM;
2315 goto err1;
2316 }
2317
2318 usb_sys_regs = (struct usb_sys_interface *)
2319 ((u32)dr_regs + USB_DR_SYS_OFFSET);
2320
2321 /* Read Device Controller Capability Parameters register */
2322 dccparams = fsl_readl(&dr_regs->dccparams);
2323 if (!(dccparams & DCCPARAMS_DC)) {
2324 ERR("This SOC doesn't support device role\n");
2325 ret = -ENODEV;
2326 goto err2;
2327 }
2328 /* Get max device endpoints */
2329 /* DEN is bidirectional ep number, max_ep doubles the number */
2330 udc_controller->max_ep = (dccparams & DCCPARAMS_DEN_MASK) * 2;
2331
2332 udc_controller->irq = platform_get_irq(pdev, 0);
2333 if (!udc_controller->irq) {
2334 ret = -ENODEV;
2335 goto err2;
2336 }
2337
2338 ret = request_irq(udc_controller->irq, fsl_udc_irq, IRQF_SHARED,
2339 driver_name, udc_controller);
2340 if (ret != 0) {
2341 ERR("cannot request irq %d err %d \n",
2342 udc_controller->irq, ret);
2343 goto err2;
2344 }
2345
2346 /* Initialize the udc structure including QH member and other member */
2347 if (struct_udc_setup(udc_controller, pdev)) {
2348 ERR("Can't initialize udc data structure\n");
2349 ret = -ENOMEM;
2350 goto err3;
2351 }
2352
2353 /* initialize usb hw reg except for regs for EP,
2354 * leave usbintr reg untouched */
2355 dr_controller_setup(udc_controller);
2356
2357 /* Setup gadget structure */
2358 udc_controller->gadget.ops = &fsl_gadget_ops;
2359 udc_controller->gadget.is_dualspeed = 1;
2360 udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
2361 INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
2362 udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2363 udc_controller->gadget.name = driver_name;
2364
2365 /* Setup gadget.dev and register with kernel */
2366 strcpy(udc_controller->gadget.dev.bus_id, "gadget");
2367 udc_controller->gadget.dev.release = fsl_udc_release;
2368 udc_controller->gadget.dev.parent = &pdev->dev;
2369 ret = device_register(&udc_controller->gadget.dev);
2370 if (ret < 0)
2371 goto err3;
2372
2373 /* setup QH and epctrl for ep0 */
2374 ep0_setup(udc_controller);
2375
2376 /* setup udc->eps[] for ep0 */
2377 struct_ep_setup(udc_controller, 0, "ep0", 0);
2378 /* for ep0: the desc defined here;
2379 * for other eps, gadget layer called ep_enable with defined desc
2380 */
2381 udc_controller->eps[0].desc = &fsl_ep0_desc;
2382 udc_controller->eps[0].ep.maxpacket = USB_MAX_CTRL_PAYLOAD;
2383
2384 /* setup the udc->eps[] for non-control endpoints and link
2385 * to gadget.ep_list */
2386 for (i = 1; i < (int)(udc_controller->max_ep / 2); i++) {
2387 char name[14];
2388
2389 sprintf(name, "ep%dout", i);
2390 struct_ep_setup(udc_controller, i * 2, name, 1);
2391 sprintf(name, "ep%din", i);
2392 struct_ep_setup(udc_controller, i * 2 + 1, name, 1);
2393 }
2394
2395 /* use dma_pool for TD management */
2396 udc_controller->td_pool = dma_pool_create("udc_td", &pdev->dev,
2397 sizeof(struct ep_td_struct),
2398 DTD_ALIGNMENT, UDC_DMA_BOUNDARY);
2399 if (udc_controller->td_pool == NULL) {
2400 ret = -ENOMEM;
2401 goto err4;
2402 }
2403 create_proc_file();
2404 return 0;
2405
2406 err4:
2407 device_unregister(&udc_controller->gadget.dev);
2408 err3:
2409 free_irq(udc_controller->irq, udc_controller);
2410 err2:
2411 iounmap(dr_regs);
2412 err1:
2413 release_mem_region(res->start, res->end - res->start + 1);
2414 kfree(udc_controller);
2415 return ret;
2416 }
2417
2418 /* Driver removal function
2419 * Free resources and finish pending transactions
2420 */
2421 static int __exit fsl_udc_remove(struct platform_device *pdev)
2422 {
2423 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2424
2425 DECLARE_COMPLETION(done);
2426
2427 if (!udc_controller)
2428 return -ENODEV;
2429 udc_controller->done = &done;
2430
2431 /* DR has been stopped in usb_gadget_unregister_driver() */
2432 remove_proc_file();
2433
2434 /* Free allocated memory */
2435 kfree(udc_controller->status_req->req.buf);
2436 kfree(udc_controller->status_req);
2437 kfree(udc_controller->eps);
2438
2439 dma_pool_destroy(udc_controller->td_pool);
2440 free_irq(udc_controller->irq, udc_controller);
2441 iounmap(dr_regs);
2442 release_mem_region(res->start, res->end - res->start + 1);
2443
2444 device_unregister(&udc_controller->gadget.dev);
2445 /* free udc --wait for the release() finished */
2446 wait_for_completion(&done);
2447
2448 return 0;
2449 }
2450
2451 /*-----------------------------------------------------------------
2452 * Modify Power management attributes
2453 * Used by OTG statemachine to disable gadget temporarily
2454 -----------------------------------------------------------------*/
2455 static int fsl_udc_suspend(struct platform_device *pdev, pm_message_t state)
2456 {
2457 dr_controller_stop(udc_controller);
2458 return 0;
2459 }
2460
2461 /*-----------------------------------------------------------------
2462 * Invoked on USB resume. May be called in_interrupt.
2463 * Here we start the DR controller and enable the irq
2464 *-----------------------------------------------------------------*/
2465 static int fsl_udc_resume(struct platform_device *pdev)
2466 {
2467 /* Enable DR irq reg and set controller Run */
2468 if (udc_controller->stopped) {
2469 dr_controller_setup(udc_controller);
2470 dr_controller_run(udc_controller);
2471 }
2472 udc_controller->usb_state = USB_STATE_ATTACHED;
2473 udc_controller->ep0_state = WAIT_FOR_SETUP;
2474 udc_controller->ep0_dir = 0;
2475 return 0;
2476 }
2477
2478 /*-------------------------------------------------------------------------
2479 Register entry point for the peripheral controller driver
2480 --------------------------------------------------------------------------*/
2481
2482 static struct platform_driver udc_driver = {
2483 .remove = __exit_p(fsl_udc_remove),
2484 /* these suspend and resume are not usb suspend and resume */
2485 .suspend = fsl_udc_suspend,
2486 .resume = fsl_udc_resume,
2487 .driver = {
2488 .name = (char *)driver_name,
2489 .owner = THIS_MODULE,
2490 },
2491 };
2492
2493 static int __init udc_init(void)
2494 {
2495 printk(KERN_INFO "%s (%s)\n", driver_desc, DRIVER_VERSION);
2496 return platform_driver_probe(&udc_driver, fsl_udc_probe);
2497 }
2498
2499 module_init(udc_init);
2500
2501 static void __exit udc_exit(void)
2502 {
2503 platform_driver_unregister(&udc_driver);
2504 printk("%s unregistered \n", driver_desc);
2505 }
2506
2507 module_exit(udc_exit);
2508
2509 MODULE_DESCRIPTION(DRIVER_DESC);
2510 MODULE_AUTHOR(DRIVER_AUTHOR);
2511 MODULE_LICENSE("GPL");
kmemtrace - Kernel memory tracer