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fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / drivers / usb / gadget / fsl_usb2_udc.c
blob9bb7f64a85cdb9b0e5041f00162b3f89d0b957dd
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 static int fsl_queue_td(struct fsl_ep *ep, struct fsl_req *req)
606 {
607 int i = ep_index(ep) * 2 + ep_is_in(ep);
608 u32 temp, bitmask, tmp_stat;
609 struct ep_queue_head *dQH = &ep->udc->ep_qh[i];
610
611 /* VDBG("QH addr Register 0x%8x", dr_regs->endpointlistaddr);
612 VDBG("ep_qh[%d] addr is 0x%8x", i, (u32)&(ep->udc->ep_qh[i])); */
613
614 bitmask = ep_is_in(ep)
615 ? (1 << (ep_index(ep) + 16))
616 : (1 << (ep_index(ep)));
617
618 /* check if the pipe is empty */
619 if (!(list_empty(&ep->queue))) {
620 /* Add td to the end */
621 struct fsl_req *lastreq;
622 lastreq = list_entry(ep->queue.prev, struct fsl_req, queue);
623 lastreq->tail->next_td_ptr =
624 cpu_to_le32(req->head->td_dma & DTD_ADDR_MASK);
625 /* Read prime bit, if 1 goto done */
626 if (fsl_readl(&dr_regs->endpointprime) & bitmask)
627 goto out;
628
629 do {
630 /* Set ATDTW bit in USBCMD */
631 temp = fsl_readl(&dr_regs->usbcmd);
632 fsl_writel(temp | USB_CMD_ATDTW, &dr_regs->usbcmd);
633
634 /* Read correct status bit */
635 tmp_stat = fsl_readl(&dr_regs->endptstatus) & bitmask;
636
637 } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_ATDTW));
638
639 /* Write ATDTW bit to 0 */
640 temp = fsl_readl(&dr_regs->usbcmd);
641 fsl_writel(temp & ~USB_CMD_ATDTW, &dr_regs->usbcmd);
642
643 if (tmp_stat)
644 goto out;
645 }
646
647 /* Write dQH next pointer and terminate bit to 0 */
648 temp = req->head->td_dma & EP_QUEUE_HEAD_NEXT_POINTER_MASK;
649 dQH->next_dtd_ptr = cpu_to_le32(temp);
650
651 /* Clear active and halt bit */
652 temp = cpu_to_le32(~(EP_QUEUE_HEAD_STATUS_ACTIVE
653 | EP_QUEUE_HEAD_STATUS_HALT));
654 dQH->size_ioc_int_sts &= temp;
655
656 /* Prime endpoint by writing 1 to ENDPTPRIME */
657 temp = ep_is_in(ep)
658 ? (1 << (ep_index(ep) + 16))
659 : (1 << (ep_index(ep)));
660 fsl_writel(temp, &dr_regs->endpointprime);
661 out:
662 return 0;
663 }
664
665 /* Fill in the dTD structure
666 * @req: request that the transfer belongs to
667 * @length: return actually data length of the dTD
668 * @dma: return dma address of the dTD
669 * @is_last: return flag if it is the last dTD of the request
670 * return: pointer to the built dTD */
671 static struct ep_td_struct *fsl_build_dtd(struct fsl_req *req, unsigned *length,
672 dma_addr_t *dma, int *is_last)
673 {
674 u32 swap_temp;
675 struct ep_td_struct *dtd;
676
677 /* how big will this transfer be? */
678 *length = min(req->req.length - req->req.actual,
679 (unsigned)EP_MAX_LENGTH_TRANSFER);
680
681 dtd = dma_pool_alloc(udc_controller->td_pool, GFP_KERNEL, dma);
682 if (dtd == NULL)
683 return dtd;
684
685 dtd->td_dma = *dma;
686 /* Clear reserved field */
687 swap_temp = cpu_to_le32(dtd->size_ioc_sts);
688 swap_temp &= ~DTD_RESERVED_FIELDS;
689 dtd->size_ioc_sts = cpu_to_le32(swap_temp);
690
691 /* Init all of buffer page pointers */
692 swap_temp = (u32) (req->req.dma + req->req.actual);
693 dtd->buff_ptr0 = cpu_to_le32(swap_temp);
694 dtd->buff_ptr1 = cpu_to_le32(swap_temp + 0x1000);
695 dtd->buff_ptr2 = cpu_to_le32(swap_temp + 0x2000);
696 dtd->buff_ptr3 = cpu_to_le32(swap_temp + 0x3000);
697 dtd->buff_ptr4 = cpu_to_le32(swap_temp + 0x4000);
698
699 req->req.actual += *length;
700
701 /* zlp is needed if req->req.zero is set */
702 if (req->req.zero) {
703 if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0)
704 *is_last = 1;
705 else
706 *is_last = 0;
707 } else if (req->req.length == req->req.actual)
708 *is_last = 1;
709 else
710 *is_last = 0;
711
712 if ((*is_last) == 0)
713 VDBG("multi-dtd request!\n");
714 /* Fill in the transfer size; set active bit */
715 swap_temp = ((*length << DTD_LENGTH_BIT_POS) | DTD_STATUS_ACTIVE);
716
717 /* Enable interrupt for the last dtd of a request */
718 if (*is_last && !req->req.no_interrupt)
719 swap_temp |= DTD_IOC;
720
721 dtd->size_ioc_sts = cpu_to_le32(swap_temp);
722
723 mb();
724
725 VDBG("length = %d address= 0x%x", *length, (int)*dma);
726
727 return dtd;
728 }
729
730 /* Generate dtd chain for a request */
731 static int fsl_req_to_dtd(struct fsl_req *req)
732 {
733 unsigned count;
734 int is_last;
735 int is_first =1;
736 struct ep_td_struct *last_dtd = NULL, *dtd;
737 dma_addr_t dma;
738
739 do {
740 dtd = fsl_build_dtd(req, &count, &dma, &is_last);
741 if (dtd == NULL)
742 return -ENOMEM;
743
744 if (is_first) {
745 is_first = 0;
746 req->head = dtd;
747 } else {
748 last_dtd->next_td_ptr = cpu_to_le32(dma);
749 last_dtd->next_td_virt = dtd;
750 }
751 last_dtd = dtd;
752
753 req->dtd_count++;
754 } while (!is_last);
755
756 dtd->next_td_ptr = cpu_to_le32(DTD_NEXT_TERMINATE);
757
758 req->tail = dtd;
759
760 return 0;
761 }
762
763 /* queues (submits) an I/O request to an endpoint */
764 static int
765 fsl_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
766 {
767 struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
768 struct fsl_req *req = container_of(_req, struct fsl_req, req);
769 struct fsl_udc *udc;
770 unsigned long flags;
771 int is_iso = 0;
772
773 /* catch various bogus parameters */
774 if (!_req || !req->req.complete || !req->req.buf
775 || !list_empty(&req->queue)) {
776 VDBG("%s, bad params\n", __FUNCTION__);
777 return -EINVAL;
778 }
779 if (!_ep || (!ep->desc && ep_index(ep))) {
780 VDBG("%s, bad ep\n", __FUNCTION__);
781 return -EINVAL;
782 }
783 if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
784 if (req->req.length > ep->ep.maxpacket)
785 return -EMSGSIZE;
786 is_iso = 1;
787 }
788
789 udc = ep->udc;
790 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
791 return -ESHUTDOWN;
792
793 req->ep = ep;
794
795 /* map virtual address to hardware */
796 if (req->req.dma == DMA_ADDR_INVALID) {
797 req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
798 req->req.buf,
799 req->req.length, ep_is_in(ep)
800 ? DMA_TO_DEVICE
801 : DMA_FROM_DEVICE);
802 req->mapped = 1;
803 } else {
804 dma_sync_single_for_device(ep->udc->gadget.dev.parent,
805 req->req.dma, req->req.length,
806 ep_is_in(ep)
807 ? DMA_TO_DEVICE
808 : DMA_FROM_DEVICE);
809 req->mapped = 0;
810 }
811
812 req->req.status = -EINPROGRESS;
813 req->req.actual = 0;
814 req->dtd_count = 0;
815
816 spin_lock_irqsave(&udc->lock, flags);
817
818 /* build dtds and push them to device queue */
819 if (!fsl_req_to_dtd(req)) {
820 fsl_queue_td(ep, req);
821 } else {
822 spin_unlock_irqrestore(&udc->lock, flags);
823 return -ENOMEM;
824 }
825
826 /* Update ep0 state */
827 if ((ep_index(ep) == 0))
828 udc->ep0_state = DATA_STATE_XMIT;
829
830 /* irq handler advances the queue */
831 if (req != NULL)
832 list_add_tail(&req->queue, &ep->queue);
833 spin_unlock_irqrestore(&udc->lock, flags);
834
835 return 0;
836 }
837
838 /* dequeues (cancels, unlinks) an I/O request from an endpoint */
839 static int fsl_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
840 {
841 struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
842 struct fsl_req *req;
843 unsigned long flags;
844 int ep_num, stopped, ret = 0;
845 u32 epctrl;
846
847 if (!_ep || !_req)
848 return -EINVAL;
849
850 spin_lock_irqsave(&ep->udc->lock, flags);
851 stopped = ep->stopped;
852
853 /* Stop the ep before we deal with the queue */
854 ep->stopped = 1;
855 ep_num = ep_index(ep);
856 epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
857 if (ep_is_in(ep))
858 epctrl &= ~EPCTRL_TX_ENABLE;
859 else
860 epctrl &= ~EPCTRL_RX_ENABLE;
861 fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
862
863 /* make sure it's actually queued on this endpoint */
864 list_for_each_entry(req, &ep->queue, queue) {
865 if (&req->req == _req)
866 break;
867 }
868 if (&req->req != _req) {
869 ret = -EINVAL;
870 goto out;
871 }
872
873 /* The request is in progress, or completed but not dequeued */
874 if (ep->queue.next == &req->queue) {
875 _req->status = -ECONNRESET;
876 fsl_ep_fifo_flush(_ep); /* flush current transfer */
877
878 /* The request isn't the last request in this ep queue */
879 if (req->queue.next != &ep->queue) {
880 struct ep_queue_head *qh;
881 struct fsl_req *next_req;
882
883 qh = ep->qh;
884 next_req = list_entry(req->queue.next, struct fsl_req,
885 queue);
886
887 /* Point the QH to the first TD of next request */
888 fsl_writel((u32) next_req->head, &qh->curr_dtd_ptr);
889 }
890
891 /* The request hasn't been processed, patch up the TD chain */
892 } else {
893 struct fsl_req *prev_req;
894
895 prev_req = list_entry(req->queue.prev, struct fsl_req, queue);
896 fsl_writel(fsl_readl(&req->tail->next_td_ptr),
897 &prev_req->tail->next_td_ptr);
898
899 }
900
901 done(ep, req, -ECONNRESET);
902
903 /* Enable EP */
904 out: epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
905 if (ep_is_in(ep))
906 epctrl |= EPCTRL_TX_ENABLE;
907 else
908 epctrl |= EPCTRL_RX_ENABLE;
909 fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
910 ep->stopped = stopped;
911
912 spin_unlock_irqrestore(&ep->udc->lock, flags);
913 return ret;
914 }
915
916 /*-------------------------------------------------------------------------*/
917
918 /*-----------------------------------------------------------------
919 * modify the endpoint halt feature
920 * @ep: the non-isochronous endpoint being stalled
921 * @value: 1--set halt 0--clear halt
922 * Returns zero, or a negative error code.
923 *----------------------------------------------------------------*/
924 static int fsl_ep_set_halt(struct usb_ep *_ep, int value)
925 {
926 struct fsl_ep *ep = NULL;
927 unsigned long flags = 0;
928 int status = -EOPNOTSUPP; /* operation not supported */
929 unsigned char ep_dir = 0, ep_num = 0;
930 struct fsl_udc *udc = NULL;
931
932 ep = container_of(_ep, struct fsl_ep, ep);
933 udc = ep->udc;
934 if (!_ep || !ep->desc) {
935 status = -EINVAL;
936 goto out;
937 }
938
939 if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
940 status = -EOPNOTSUPP;
941 goto out;
942 }
943
944 /* Attempt to halt IN ep will fail if any transfer requests
945 * are still queue */
946 if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
947 status = -EAGAIN;
948 goto out;
949 }
950
951 status = 0;
952 ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
953 ep_num = (unsigned char)(ep_index(ep));
954 spin_lock_irqsave(&ep->udc->lock, flags);
955 dr_ep_change_stall(ep_num, ep_dir, value);
956 spin_unlock_irqrestore(&ep->udc->lock, flags);
957
958 if (ep_index(ep) == 0) {
959 udc->ep0_state = WAIT_FOR_SETUP;
960 udc->ep0_dir = 0;
961 }
962 out:
963 VDBG(" %s %s halt stat %d", ep->ep.name,
964 value ? "set" : "clear", status);
965
966 return status;
967 }
968
969 static void fsl_ep_fifo_flush(struct usb_ep *_ep)
970 {
971 struct fsl_ep *ep;
972 int ep_num, ep_dir;
973 u32 bits;
974 unsigned long timeout;
975 #define FSL_UDC_FLUSH_TIMEOUT 1000
976
977 if (!_ep) {
978 return;
979 } else {
980 ep = container_of(_ep, struct fsl_ep, ep);
981 if (!ep->desc)
982 return;
983 }
984 ep_num = ep_index(ep);
985 ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
986
987 if (ep_num == 0)
988 bits = (1 << 16) | 1;
989 else if (ep_dir == USB_SEND)
990 bits = 1 << (16 + ep_num);
991 else
992 bits = 1 << ep_num;
993
994 timeout = jiffies + FSL_UDC_FLUSH_TIMEOUT;
995 do {
996 fsl_writel(bits, &dr_regs->endptflush);
997
998 /* Wait until flush complete */
999 while (fsl_readl(&dr_regs->endptflush)) {
1000 if (time_after(jiffies, timeout)) {
1001 ERR("ep flush timeout\n");
1002 return;
1003 }
1004 cpu_relax();
1005 }
1006 /* See if we need to flush again */
1007 } while (fsl_readl(&dr_regs->endptstatus) & bits);
1008 }
1009
1010 static struct usb_ep_ops fsl_ep_ops = {
1011 .enable = fsl_ep_enable,
1012 .disable = fsl_ep_disable,
1013
1014 .alloc_request = fsl_alloc_request,
1015 .free_request = fsl_free_request,
1016
1017 .queue = fsl_ep_queue,
1018 .dequeue = fsl_ep_dequeue,
1019
1020 .set_halt = fsl_ep_set_halt,
1021 .fifo_flush = fsl_ep_fifo_flush, /* flush fifo */
1022 };
1023
1024 /*-------------------------------------------------------------------------
1025 Gadget Driver Layer Operations
1026 -------------------------------------------------------------------------*/
1027
1028 /*----------------------------------------------------------------------
1029 * Get the current frame number (from DR frame_index Reg )
1030 *----------------------------------------------------------------------*/
1031 static int fsl_get_frame(struct usb_gadget *gadget)
1032 {
1033 return (int)(fsl_readl(&dr_regs->frindex) & USB_FRINDEX_MASKS);
1034 }
1035
1036 /*-----------------------------------------------------------------------
1037 * Tries to wake up the host connected to this gadget
1038 -----------------------------------------------------------------------*/
1039 static int fsl_wakeup(struct usb_gadget *gadget)
1040 {
1041 struct fsl_udc *udc = container_of(gadget, struct fsl_udc, gadget);
1042 u32 portsc;
1043
1044 /* Remote wakeup feature not enabled by host */
1045 if (!udc->remote_wakeup)
1046 return -ENOTSUPP;
1047
1048 portsc = fsl_readl(&dr_regs->portsc1);
1049 /* not suspended? */
1050 if (!(portsc & PORTSCX_PORT_SUSPEND))
1051 return 0;
1052 /* trigger force resume */
1053 portsc |= PORTSCX_PORT_FORCE_RESUME;
1054 fsl_writel(portsc, &dr_regs->portsc1);
1055 return 0;
1056 }
1057
1058 static int can_pullup(struct fsl_udc *udc)
1059 {
1060 return udc->driver && udc->softconnect && udc->vbus_active;
1061 }
1062
1063 /* Notify controller that VBUS is powered, Called by whatever
1064 detects VBUS sessions */
1065 static int fsl_vbus_session(struct usb_gadget *gadget, int is_active)
1066 {
1067 struct fsl_udc *udc;
1068 unsigned long flags;
1069
1070 udc = container_of(gadget, struct fsl_udc, gadget);
1071 spin_lock_irqsave(&udc->lock, flags);
1072 VDBG("VBUS %s\n", is_active ? "on" : "off");
1073 udc->vbus_active = (is_active != 0);
1074 if (can_pullup(udc))
1075 fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
1076 &dr_regs->usbcmd);
1077 else
1078 fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
1079 &dr_regs->usbcmd);
1080 spin_unlock_irqrestore(&udc->lock, flags);
1081 return 0;
1082 }
1083
1084 /* constrain controller's VBUS power usage
1085 * This call is used by gadget drivers during SET_CONFIGURATION calls,
1086 * reporting how much power the device may consume. For example, this
1087 * could affect how quickly batteries are recharged.
1088 *
1089 * Returns zero on success, else negative errno.
1090 */
1091 static int fsl_vbus_draw(struct usb_gadget *gadget, unsigned mA)
1092 {
1093 struct fsl_udc *udc;
1094
1095 udc = container_of(gadget, struct fsl_udc, gadget);
1096 if (udc->transceiver)
1097 return otg_set_power(udc->transceiver, mA);
1098 return -ENOTSUPP;
1099 }
1100
1101 /* Change Data+ pullup status
1102 * this func is used by usb_gadget_connect/disconnet
1103 */
1104 static int fsl_pullup(struct usb_gadget *gadget, int is_on)
1105 {
1106 struct fsl_udc *udc;
1107
1108 udc = container_of(gadget, struct fsl_udc, gadget);
1109 udc->softconnect = (is_on != 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
1117 return 0;
1118 }
1119
1120 /* defined in gadget.h */
1121 static struct usb_gadget_ops fsl_gadget_ops = {
1122 .get_frame = fsl_get_frame,
1123 .wakeup = fsl_wakeup,
1124 /* .set_selfpowered = fsl_set_selfpowered, */ /* Always selfpowered */
1125 .vbus_session = fsl_vbus_session,
1126 .vbus_draw = fsl_vbus_draw,
1127 .pullup = fsl_pullup,
1128 };
1129
1130 /* Set protocol stall on ep0, protocol stall will automatically be cleared
1131 on new transaction */
1132 static void ep0stall(struct fsl_udc *udc)
1133 {
1134 u32 tmp;
1135
1136 /* must set tx and rx to stall at the same time */
1137 tmp = fsl_readl(&dr_regs->endptctrl[0]);
1138 tmp |= EPCTRL_TX_EP_STALL | EPCTRL_RX_EP_STALL;
1139 fsl_writel(tmp, &dr_regs->endptctrl[0]);
1140 udc->ep0_state = WAIT_FOR_SETUP;
1141 udc->ep0_dir = 0;
1142 }
1143
1144 /* Prime a status phase for ep0 */
1145 static int ep0_prime_status(struct fsl_udc *udc, int direction)
1146 {
1147 struct fsl_req *req = udc->status_req;
1148 struct fsl_ep *ep;
1149 int status = 0;
1150
1151 if (direction == EP_DIR_IN)
1152 udc->ep0_dir = USB_DIR_IN;
1153 else
1154 udc->ep0_dir = USB_DIR_OUT;
1155
1156 ep = &udc->eps[0];
1157 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1158
1159 req->ep = ep;
1160 req->req.length = 0;
1161 req->req.status = -EINPROGRESS;
1162 req->req.actual = 0;
1163 req->req.complete = NULL;
1164 req->dtd_count = 0;
1165
1166 if (fsl_req_to_dtd(req) == 0)
1167 status = fsl_queue_td(ep, req);
1168 else
1169 return -ENOMEM;
1170
1171 if (status)
1172 ERR("Can't queue ep0 status request \n");
1173 list_add_tail(&req->queue, &ep->queue);
1174
1175 return status;
1176 }
1177
1178 static inline int udc_reset_ep_queue(struct fsl_udc *udc, u8 pipe)
1179 {
1180 struct fsl_ep *ep = get_ep_by_pipe(udc, pipe);
1181
1182 if (!ep->name)
1183 return 0;
1184
1185 nuke(ep, -ESHUTDOWN);
1186
1187 return 0;
1188 }
1189
1190 /*
1191 * ch9 Set address
1192 */
1193 static void ch9setaddress(struct fsl_udc *udc, u16 value, u16 index, u16 length)
1194 {
1195 /* Save the new address to device struct */
1196 udc->device_address = (u8) value;
1197 /* Update usb state */
1198 udc->usb_state = USB_STATE_ADDRESS;
1199 /* Status phase */
1200 if (ep0_prime_status(udc, EP_DIR_IN))
1201 ep0stall(udc);
1202 }
1203
1204 /*
1205 * ch9 Get status
1206 */
1207 static void ch9getstatus(struct fsl_udc *udc, u8 request_type, u16 value,
1208 u16 index, u16 length)
1209 {
1210 u16 tmp = 0; /* Status, cpu endian */
1211
1212 struct fsl_req *req;
1213 struct fsl_ep *ep;
1214 int status = 0;
1215
1216 ep = &udc->eps[0];
1217
1218 if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1219 /* Get device status */
1220 tmp = 1 << USB_DEVICE_SELF_POWERED;
1221 tmp |= udc->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP;
1222 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
1223 /* Get interface status */
1224 /* We don't have interface information in udc driver */
1225 tmp = 0;
1226 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
1227 /* Get endpoint status */
1228 struct fsl_ep *target_ep;
1229
1230 target_ep = get_ep_by_pipe(udc, get_pipe_by_windex(index));
1231
1232 /* stall if endpoint doesn't exist */
1233 if (!target_ep->desc)
1234 goto stall;
1235 tmp = dr_ep_get_stall(ep_index(target_ep), ep_is_in(target_ep))
1236 << USB_ENDPOINT_HALT;
1237 }
1238
1239 udc->ep0_dir = USB_DIR_IN;
1240 /* Borrow the per device status_req */
1241 req = udc->status_req;
1242 /* Fill in the reqest structure */
1243 *((u16 *) req->req.buf) = cpu_to_le16(tmp);
1244 req->ep = ep;
1245 req->req.length = 2;
1246 req->req.status = -EINPROGRESS;
1247 req->req.actual = 0;
1248 req->req.complete = NULL;
1249 req->dtd_count = 0;
1250
1251 /* prime the data phase */
1252 if ((fsl_req_to_dtd(req) == 0))
1253 status = fsl_queue_td(ep, req);
1254 else /* no mem */
1255 goto stall;
1256
1257 if (status) {
1258 ERR("Can't respond to getstatus request \n");
1259 goto stall;
1260 }
1261 list_add_tail(&req->queue, &ep->queue);
1262 udc->ep0_state = DATA_STATE_XMIT;
1263 return;
1264 stall:
1265 ep0stall(udc);
1266 }
1267
1268 static void setup_received_irq(struct fsl_udc *udc,
1269 struct usb_ctrlrequest *setup)
1270 {
1271 u16 wValue = le16_to_cpu(setup->wValue);
1272 u16 wIndex = le16_to_cpu(setup->wIndex);
1273 u16 wLength = le16_to_cpu(setup->wLength);
1274
1275 udc_reset_ep_queue(udc, 0);
1276
1277 /* We process some stardard setup requests here */
1278 switch (setup->bRequest) {
1279 case USB_REQ_GET_STATUS:
1280 /* Data+Status phase from udc */
1281 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
1282 != (USB_DIR_IN | USB_TYPE_STANDARD))
1283 break;
1284 ch9getstatus(udc, setup->bRequestType, wValue, wIndex, wLength);
1285 return;
1286
1287 case USB_REQ_SET_ADDRESS:
1288 /* Status phase from udc */
1289 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD
1290 | USB_RECIP_DEVICE))
1291 break;
1292 ch9setaddress(udc, wValue, wIndex, wLength);
1293 return;
1294
1295 case USB_REQ_CLEAR_FEATURE:
1296 case USB_REQ_SET_FEATURE:
1297 /* Status phase from udc */
1298 {
1299 int rc = -EOPNOTSUPP;
1300
1301 if ((setup->bRequestType & (USB_RECIP_MASK | USB_TYPE_MASK))
1302 == (USB_RECIP_ENDPOINT | USB_TYPE_STANDARD)) {
1303 int pipe = get_pipe_by_windex(wIndex);
1304 struct fsl_ep *ep;
1305
1306 if (wValue != 0 || wLength != 0 || pipe > udc->max_ep)
1307 break;
1308 ep = get_ep_by_pipe(udc, pipe);
1309
1310 spin_unlock(&udc->lock);
1311 rc = fsl_ep_set_halt(&ep->ep,
1312 (setup->bRequest == USB_REQ_SET_FEATURE)
1313 ? 1 : 0);
1314 spin_lock(&udc->lock);
1315
1316 } else if ((setup->bRequestType & (USB_RECIP_MASK
1317 | USB_TYPE_MASK)) == (USB_RECIP_DEVICE
1318 | USB_TYPE_STANDARD)) {
1319 /* Note: The driver has not include OTG support yet.
1320 * This will be set when OTG support is added */
1321 if (!gadget_is_otg(udc->gadget))
1322 break;
1323 else if (setup->bRequest == USB_DEVICE_B_HNP_ENABLE)
1324 udc->gadget.b_hnp_enable = 1;
1325 else if (setup->bRequest == USB_DEVICE_A_HNP_SUPPORT)
1326 udc->gadget.a_hnp_support = 1;
1327 else if (setup->bRequest ==
1328 USB_DEVICE_A_ALT_HNP_SUPPORT)
1329 udc->gadget.a_alt_hnp_support = 1;
1330 else
1331 break;
1332 rc = 0;
1333 } else
1334 break;
1335
1336 if (rc == 0) {
1337 if (ep0_prime_status(udc, EP_DIR_IN))
1338 ep0stall(udc);
1339 }
1340 return;
1341 }
1342
1343 default:
1344 break;
1345 }
1346
1347 /* Requests handled by gadget */
1348 if (wLength) {
1349 /* Data phase from gadget, status phase from udc */
1350 udc->ep0_dir = (setup->bRequestType & USB_DIR_IN)
1351 ? USB_DIR_IN : USB_DIR_OUT;
1352 spin_unlock(&udc->lock);
1353 if (udc->driver->setup(&udc->gadget,
1354 &udc->local_setup_buff) < 0)
1355 ep0stall(udc);
1356 spin_lock(&udc->lock);
1357 udc->ep0_state = (setup->bRequestType & USB_DIR_IN)
1358 ? DATA_STATE_XMIT : DATA_STATE_RECV;
1359 } else {
1360 /* No data phase, IN status from gadget */
1361 udc->ep0_dir = USB_DIR_IN;
1362 spin_unlock(&udc->lock);
1363 if (udc->driver->setup(&udc->gadget,
1364 &udc->local_setup_buff) < 0)
1365 ep0stall(udc);
1366 spin_lock(&udc->lock);
1367 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1368 }
1369 }
1370
1371 /* Process request for Data or Status phase of ep0
1372 * prime status phase if needed */
1373 static void ep0_req_complete(struct fsl_udc *udc, struct fsl_ep *ep0,
1374 struct fsl_req *req)
1375 {
1376 if (udc->usb_state == USB_STATE_ADDRESS) {
1377 /* Set the new address */
1378 u32 new_address = (u32) udc->device_address;
1379 fsl_writel(new_address << USB_DEVICE_ADDRESS_BIT_POS,
1380 &dr_regs->deviceaddr);
1381 }
1382
1383 done(ep0, req, 0);
1384
1385 switch (udc->ep0_state) {
1386 case DATA_STATE_XMIT:
1387 /* receive status phase */
1388 if (ep0_prime_status(udc, EP_DIR_OUT))
1389 ep0stall(udc);
1390 break;
1391 case DATA_STATE_RECV:
1392 /* send status phase */
1393 if (ep0_prime_status(udc, EP_DIR_IN))
1394 ep0stall(udc);
1395 break;
1396 case WAIT_FOR_OUT_STATUS:
1397 udc->ep0_state = WAIT_FOR_SETUP;
1398 break;
1399 case WAIT_FOR_SETUP:
1400 ERR("Unexpect ep0 packets \n");
1401 break;
1402 default:
1403 ep0stall(udc);
1404 break;
1405 }
1406 }
1407
1408 /* Tripwire mechanism to ensure a setup packet payload is extracted without
1409 * being corrupted by another incoming setup packet */
1410 static void tripwire_handler(struct fsl_udc *udc, u8 ep_num, u8 *buffer_ptr)
1411 {
1412 u32 temp;
1413 struct ep_queue_head *qh;
1414
1415 qh = &udc->ep_qh[ep_num * 2 + EP_DIR_OUT];
1416
1417 /* Clear bit in ENDPTSETUPSTAT */
1418 temp = fsl_readl(&dr_regs->endptsetupstat);
1419 fsl_writel(temp | (1 << ep_num), &dr_regs->endptsetupstat);
1420
1421 /* while a hazard exists when setup package arrives */
1422 do {
1423 /* Set Setup Tripwire */
1424 temp = fsl_readl(&dr_regs->usbcmd);
1425 fsl_writel(temp | USB_CMD_SUTW, &dr_regs->usbcmd);
1426
1427 /* Copy the setup packet to local buffer */
1428 memcpy(buffer_ptr, (u8 *) qh->setup_buffer, 8);
1429 } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_SUTW));
1430
1431 /* Clear Setup Tripwire */
1432 temp = fsl_readl(&dr_regs->usbcmd);
1433 fsl_writel(temp & ~USB_CMD_SUTW, &dr_regs->usbcmd);
1434 }
1435
1436 /* process-ep_req(): free the completed Tds for this req */
1437 static int process_ep_req(struct fsl_udc *udc, int pipe,
1438 struct fsl_req *curr_req)
1439 {
1440 struct ep_td_struct *curr_td;
1441 int td_complete, actual, remaining_length, j, tmp;
1442 int status = 0;
1443 int errors = 0;
1444 struct ep_queue_head *curr_qh = &udc->ep_qh[pipe];
1445 int direction = pipe % 2;
1446
1447 curr_td = curr_req->head;
1448 td_complete = 0;
1449 actual = curr_req->req.length;
1450
1451 for (j = 0; j < curr_req->dtd_count; j++) {
1452 remaining_length = (le32_to_cpu(curr_td->size_ioc_sts)
1453 & DTD_PACKET_SIZE)
1454 >> DTD_LENGTH_BIT_POS;
1455 actual -= remaining_length;
1456
1457 if ((errors = le32_to_cpu(curr_td->size_ioc_sts) &
1458 DTD_ERROR_MASK)) {
1459 if (errors & DTD_STATUS_HALTED) {
1460 ERR("dTD error %08x QH=%d\n", errors, pipe);
1461 /* Clear the errors and Halt condition */
1462 tmp = le32_to_cpu(curr_qh->size_ioc_int_sts);
1463 tmp &= ~errors;
1464 curr_qh->size_ioc_int_sts = cpu_to_le32(tmp);
1465 status = -EPIPE;
1466 /* FIXME: continue with next queued TD? */
1467
1468 break;
1469 }
1470 if (errors & DTD_STATUS_DATA_BUFF_ERR) {
1471 VDBG("Transfer overflow");
1472 status = -EPROTO;
1473 break;
1474 } else if (errors & DTD_STATUS_TRANSACTION_ERR) {
1475 VDBG("ISO error");
1476 status = -EILSEQ;
1477 break;
1478 } else
1479 ERR("Unknown error has occured (0x%x)!\r\n",
1480 errors);
1481
1482 } else if (le32_to_cpu(curr_td->size_ioc_sts)
1483 & DTD_STATUS_ACTIVE) {
1484 VDBG("Request not complete");
1485 status = REQ_UNCOMPLETE;
1486 return status;
1487 } else if (remaining_length) {
1488 if (direction) {
1489 VDBG("Transmit dTD remaining length not zero");
1490 status = -EPROTO;
1491 break;
1492 } else {
1493 td_complete++;
1494 break;
1495 }
1496 } else {
1497 td_complete++;
1498 VDBG("dTD transmitted successful ");
1499 }
1500
1501 if (j != curr_req->dtd_count - 1)
1502 curr_td = (struct ep_td_struct *)curr_td->next_td_virt;
1503 }
1504
1505 if (status)
1506 return status;
1507
1508 curr_req->req.actual = actual;
1509
1510 return 0;
1511 }
1512
1513 /* Process a DTD completion interrupt */
1514 static void dtd_complete_irq(struct fsl_udc *udc)
1515 {
1516 u32 bit_pos;
1517 int i, ep_num, direction, bit_mask, status;
1518 struct fsl_ep *curr_ep;
1519 struct fsl_req *curr_req, *temp_req;
1520
1521 /* Clear the bits in the register */
1522 bit_pos = fsl_readl(&dr_regs->endptcomplete);
1523 fsl_writel(bit_pos, &dr_regs->endptcomplete);
1524
1525 if (!bit_pos)
1526 return;
1527
1528 for (i = 0; i < udc->max_ep * 2; i++) {
1529 ep_num = i >> 1;
1530 direction = i % 2;
1531
1532 bit_mask = 1 << (ep_num + 16 * direction);
1533
1534 if (!(bit_pos & bit_mask))
1535 continue;
1536
1537 curr_ep = get_ep_by_pipe(udc, i);
1538
1539 /* If the ep is configured */
1540 if (curr_ep->name == NULL) {
1541 WARN("Invalid EP?");
1542 continue;
1543 }
1544
1545 /* process the req queue until an uncomplete request */
1546 list_for_each_entry_safe(curr_req, temp_req, &curr_ep->queue,
1547 queue) {
1548 status = process_ep_req(udc, i, curr_req);
1549
1550 VDBG("status of process_ep_req= %d, ep = %d",
1551 status, ep_num);
1552 if (status == REQ_UNCOMPLETE)
1553 break;
1554 /* write back status to req */
1555 curr_req->req.status = status;
1556
1557 if (ep_num == 0) {
1558 ep0_req_complete(udc, curr_ep, curr_req);
1559 break;
1560 } else
1561 done(curr_ep, curr_req, status);
1562 }
1563 }
1564 }
1565
1566 /* Process a port change interrupt */
1567 static void port_change_irq(struct fsl_udc *udc)
1568 {
1569 u32 speed;
1570
1571 if (udc->bus_reset)
1572 udc->bus_reset = 0;
1573
1574 /* Bus resetting is finished */
1575 if (!(fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET)) {
1576 /* Get the speed */
1577 speed = (fsl_readl(&dr_regs->portsc1)
1578 & PORTSCX_PORT_SPEED_MASK);
1579 switch (speed) {
1580 case PORTSCX_PORT_SPEED_HIGH:
1581 udc->gadget.speed = USB_SPEED_HIGH;
1582 break;
1583 case PORTSCX_PORT_SPEED_FULL:
1584 udc->gadget.speed = USB_SPEED_FULL;
1585 break;
1586 case PORTSCX_PORT_SPEED_LOW:
1587 udc->gadget.speed = USB_SPEED_LOW;
1588 break;
1589 default:
1590 udc->gadget.speed = USB_SPEED_UNKNOWN;
1591 break;
1592 }
1593 }
1594
1595 /* Update USB state */
1596 if (!udc->resume_state)
1597 udc->usb_state = USB_STATE_DEFAULT;
1598 }
1599
1600 /* Process suspend interrupt */
1601 static void suspend_irq(struct fsl_udc *udc)
1602 {
1603 udc->resume_state = udc->usb_state;
1604 udc->usb_state = USB_STATE_SUSPENDED;
1605
1606 /* report suspend to the driver, serial.c does not support this */
1607 if (udc->driver->suspend)
1608 udc->driver->suspend(&udc->gadget);
1609 }
1610
1611 static void bus_resume(struct fsl_udc *udc)
1612 {
1613 udc->usb_state = udc->resume_state;
1614 udc->resume_state = 0;
1615
1616 /* report resume to the driver, serial.c does not support this */
1617 if (udc->driver->resume)
1618 udc->driver->resume(&udc->gadget);
1619 }
1620
1621 /* Clear up all ep queues */
1622 static int reset_queues(struct fsl_udc *udc)
1623 {
1624 u8 pipe;
1625
1626 for (pipe = 0; pipe < udc->max_pipes; pipe++)
1627 udc_reset_ep_queue(udc, pipe);
1628
1629 /* report disconnect; the driver is already quiesced */
1630 udc->driver->disconnect(&udc->gadget);
1631
1632 return 0;
1633 }
1634
1635 /* Process reset interrupt */
1636 static void reset_irq(struct fsl_udc *udc)
1637 {
1638 u32 temp;
1639 unsigned long timeout;
1640
1641 /* Clear the device address */
1642 temp = fsl_readl(&dr_regs->deviceaddr);
1643 fsl_writel(temp & ~USB_DEVICE_ADDRESS_MASK, &dr_regs->deviceaddr);
1644
1645 udc->device_address = 0;
1646
1647 /* Clear usb state */
1648 udc->resume_state = 0;
1649 udc->ep0_dir = 0;
1650 udc->ep0_state = WAIT_FOR_SETUP;
1651 udc->remote_wakeup = 0; /* default to 0 on reset */
1652 udc->gadget.b_hnp_enable = 0;
1653 udc->gadget.a_hnp_support = 0;
1654 udc->gadget.a_alt_hnp_support = 0;
1655
1656 /* Clear all the setup token semaphores */
1657 temp = fsl_readl(&dr_regs->endptsetupstat);
1658 fsl_writel(temp, &dr_regs->endptsetupstat);
1659
1660 /* Clear all the endpoint complete status bits */
1661 temp = fsl_readl(&dr_regs->endptcomplete);
1662 fsl_writel(temp, &dr_regs->endptcomplete);
1663
1664 timeout = jiffies + 100;
1665 while (fsl_readl(&dr_regs->endpointprime)) {
1666 /* Wait until all endptprime bits cleared */
1667 if (time_after(jiffies, timeout)) {
1668 ERR("Timeout for reset\n");
1669 break;
1670 }
1671 cpu_relax();
1672 }
1673
1674 /* Write 1s to the flush register */
1675 fsl_writel(0xffffffff, &dr_regs->endptflush);
1676
1677 if (fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET) {
1678 VDBG("Bus reset");
1679 /* Bus is reseting */
1680 udc->bus_reset = 1;
1681 /* Reset all the queues, include XD, dTD, EP queue
1682 * head and TR Queue */
1683 reset_queues(udc);
1684 udc->usb_state = USB_STATE_DEFAULT;
1685 } else {
1686 VDBG("Controller reset");
1687 /* initialize usb hw reg except for regs for EP, not
1688 * touch usbintr reg */
1689 dr_controller_setup(udc);
1690
1691 /* Reset all internal used Queues */
1692 reset_queues(udc);
1693
1694 ep0_setup(udc);
1695
1696 /* Enable DR IRQ reg, Set Run bit, change udc state */
1697 dr_controller_run(udc);
1698 udc->usb_state = USB_STATE_ATTACHED;
1699 }
1700 }
1701
1702 /*
1703 * USB device controller interrupt handler
1704 */
1705 static irqreturn_t fsl_udc_irq(int irq, void *_udc)
1706 {
1707 struct fsl_udc *udc = _udc;
1708 u32 irq_src;
1709 irqreturn_t status = IRQ_NONE;
1710 unsigned long flags;
1711
1712 /* Disable ISR for OTG host mode */
1713 if (udc->stopped)
1714 return IRQ_NONE;
1715 spin_lock_irqsave(&udc->lock, flags);
1716 irq_src = fsl_readl(&dr_regs->usbsts) & fsl_readl(&dr_regs->usbintr);
1717 /* Clear notification bits */
1718 fsl_writel(irq_src, &dr_regs->usbsts);
1719
1720 /* VDBG("irq_src [0x%8x]", irq_src); */
1721
1722 /* Need to resume? */
1723 if (udc->usb_state == USB_STATE_SUSPENDED)
1724 if ((fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_SUSPEND) == 0)
1725 bus_resume(udc);
1726
1727 /* USB Interrupt */
1728 if (irq_src & USB_STS_INT) {
1729 VDBG("Packet int");
1730 /* Setup package, we only support ep0 as control ep */
1731 if (fsl_readl(&dr_regs->endptsetupstat) & EP_SETUP_STATUS_EP0) {
1732 tripwire_handler(udc, 0,
1733 (u8 *) (&udc->local_setup_buff));
1734 setup_received_irq(udc, &udc->local_setup_buff);
1735 status = IRQ_HANDLED;
1736 }
1737
1738 /* completion of dtd */
1739 if (fsl_readl(&dr_regs->endptcomplete)) {
1740 dtd_complete_irq(udc);
1741 status = IRQ_HANDLED;
1742 }
1743 }
1744
1745 /* SOF (for ISO transfer) */
1746 if (irq_src & USB_STS_SOF) {
1747 status = IRQ_HANDLED;
1748 }
1749
1750 /* Port Change */
1751 if (irq_src & USB_STS_PORT_CHANGE) {
1752 port_change_irq(udc);
1753 status = IRQ_HANDLED;
1754 }
1755
1756 /* Reset Received */
1757 if (irq_src & USB_STS_RESET) {
1758 reset_irq(udc);
1759 status = IRQ_HANDLED;
1760 }
1761
1762 /* Sleep Enable (Suspend) */
1763 if (irq_src & USB_STS_SUSPEND) {
1764 suspend_irq(udc);
1765 status = IRQ_HANDLED;
1766 }
1767
1768 if (irq_src & (USB_STS_ERR | USB_STS_SYS_ERR)) {
1769 VDBG("Error IRQ %x ", irq_src);
1770 }
1771
1772 spin_unlock_irqrestore(&udc->lock, flags);
1773 return status;
1774 }
1775
1776 /*----------------------------------------------------------------*
1777 * Hook to gadget drivers
1778 * Called by initialization code of gadget drivers
1779 *----------------------------------------------------------------*/
1780 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
1781 {
1782 int retval = -ENODEV;
1783 unsigned long flags = 0;
1784
1785 if (!udc_controller)
1786 return -ENODEV;
1787
1788 if (!driver || (driver->speed != USB_SPEED_FULL
1789 && driver->speed != USB_SPEED_HIGH)
1790 || !driver->bind || !driver->disconnect
1791 || !driver->setup)
1792 return -EINVAL;
1793
1794 if (udc_controller->driver)
1795 return -EBUSY;
1796
1797 /* lock is needed but whether should use this lock or another */
1798 spin_lock_irqsave(&udc_controller->lock, flags);
1799
1800 driver->driver.bus = 0;
1801 /* hook up the driver */
1802 udc_controller->driver = driver;
1803 udc_controller->gadget.dev.driver = &driver->driver;
1804 spin_unlock_irqrestore(&udc_controller->lock, flags);
1805
1806 /* bind udc driver to gadget driver */
1807 retval = driver->bind(&udc_controller->gadget);
1808 if (retval) {
1809 VDBG("bind to %s --> %d", driver->driver.name, retval);
1810 udc_controller->gadget.dev.driver = 0;
1811 udc_controller->driver = 0;
1812 goto out;
1813 }
1814
1815 /* Enable DR IRQ reg and Set usbcmd reg Run bit */
1816 dr_controller_run(udc_controller);
1817 udc_controller->usb_state = USB_STATE_ATTACHED;
1818 udc_controller->ep0_state = WAIT_FOR_SETUP;
1819 udc_controller->ep0_dir = 0;
1820 printk(KERN_INFO "%s: bind to driver %s \n",
1821 udc_controller->gadget.name, driver->driver.name);
1822
1823 out:
1824 if (retval)
1825 printk("retval %d \n", retval);
1826 return retval;
1827 }
1828 EXPORT_SYMBOL(usb_gadget_register_driver);
1829
1830 /* Disconnect from gadget driver */
1831 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1832 {
1833 struct fsl_ep *loop_ep;
1834 unsigned long flags;
1835
1836 if (!udc_controller)
1837 return -ENODEV;
1838
1839 if (!driver || driver != udc_controller->driver || !driver->unbind)
1840 return -EINVAL;
1841
1842 if (udc_controller->transceiver)
1843 (void)otg_set_peripheral(udc_controller->transceiver, 0);
1844
1845 /* stop DR, disable intr */
1846 dr_controller_stop(udc_controller);
1847
1848 /* in fact, no needed */
1849 udc_controller->usb_state = USB_STATE_ATTACHED;
1850 udc_controller->ep0_state = WAIT_FOR_SETUP;
1851 udc_controller->ep0_dir = 0;
1852
1853 /* stand operation */
1854 spin_lock_irqsave(&udc_controller->lock, flags);
1855 udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
1856 nuke(&udc_controller->eps[0], -ESHUTDOWN);
1857 list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
1858 ep.ep_list)
1859 nuke(loop_ep, -ESHUTDOWN);
1860 spin_unlock_irqrestore(&udc_controller->lock, flags);
1861
1862 /* unbind gadget and unhook driver. */
1863 driver->unbind(&udc_controller->gadget);
1864 udc_controller->gadget.dev.driver = 0;
1865 udc_controller->driver = 0;
1866
1867 printk("unregistered gadget driver '%s'\r\n", driver->driver.name);
1868 return 0;
1869 }
1870 EXPORT_SYMBOL(usb_gadget_unregister_driver);
1871
1872 /*-------------------------------------------------------------------------
1873 PROC File System Support
1874 -------------------------------------------------------------------------*/
1875 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1876
1877 #include <linux/seq_file.h>
1878
1879 static const char proc_filename[] = "driver/fsl_usb2_udc";
1880
1881 static int fsl_proc_read(char *page, char **start, off_t off, int count,
1882 int *eof, void *_dev)
1883 {
1884 char *buf = page;
1885 char *next = buf;
1886 unsigned size = count;
1887 unsigned long flags;
1888 int t, i;
1889 u32 tmp_reg;
1890 struct fsl_ep *ep = NULL;
1891 struct fsl_req *req;
1892
1893 struct fsl_udc *udc = udc_controller;
1894 if (off != 0)
1895 return 0;
1896
1897 spin_lock_irqsave(&udc->lock, flags);
1898
1899 /* ------basic driver infomation ---- */
1900 t = scnprintf(next, size,
1901 DRIVER_DESC "\n"
1902 "%s version: %s\n"
1903 "Gadget driver: %s\n\n",
1904 driver_name, DRIVER_VERSION,
1905 udc->driver ? udc->driver->driver.name : "(none)");
1906 size -= t;
1907 next += t;
1908
1909 /* ------ DR Registers ----- */
1910 tmp_reg = fsl_readl(&dr_regs->usbcmd);
1911 t = scnprintf(next, size,
1912 "USBCMD reg:\n"
1913 "SetupTW: %d\n"
1914 "Run/Stop: %s\n\n",
1915 (tmp_reg & USB_CMD_SUTW) ? 1 : 0,
1916 (tmp_reg & USB_CMD_RUN_STOP) ? "Run" : "Stop");
1917 size -= t;
1918 next += t;
1919
1920 tmp_reg = fsl_readl(&dr_regs->usbsts);
1921 t = scnprintf(next, size,
1922 "USB Status Reg:\n"
1923 "Dr Suspend: %d" "Reset Received: %d" "System Error: %s"
1924 "USB Error Interrupt: %s\n\n",
1925 (tmp_reg & USB_STS_SUSPEND) ? 1 : 0,
1926 (tmp_reg & USB_STS_RESET) ? 1 : 0,
1927 (tmp_reg & USB_STS_SYS_ERR) ? "Err" : "Normal",
1928 (tmp_reg & USB_STS_ERR) ? "Err detected" : "No err");
1929 size -= t;
1930 next += t;
1931
1932 tmp_reg = fsl_readl(&dr_regs->usbintr);
1933 t = scnprintf(next, size,
1934 "USB Intrrupt Enable Reg:\n"
1935 "Sleep Enable: %d" "SOF Received Enable: %d"
1936 "Reset Enable: %d\n"
1937 "System Error Enable: %d"
1938 "Port Change Dectected Enable: %d\n"
1939 "USB Error Intr Enable: %d" "USB Intr Enable: %d\n\n",
1940 (tmp_reg & USB_INTR_DEVICE_SUSPEND) ? 1 : 0,
1941 (tmp_reg & USB_INTR_SOF_EN) ? 1 : 0,
1942 (tmp_reg & USB_INTR_RESET_EN) ? 1 : 0,
1943 (tmp_reg & USB_INTR_SYS_ERR_EN) ? 1 : 0,
1944 (tmp_reg & USB_INTR_PTC_DETECT_EN) ? 1 : 0,
1945 (tmp_reg & USB_INTR_ERR_INT_EN) ? 1 : 0,
1946 (tmp_reg & USB_INTR_INT_EN) ? 1 : 0);
1947 size -= t;
1948 next += t;
1949
1950 tmp_reg = fsl_readl(&dr_regs->frindex);
1951 t = scnprintf(next, size,
1952 "USB Frame Index Reg:" "Frame Number is 0x%x\n\n",
1953 (tmp_reg & USB_FRINDEX_MASKS));
1954 size -= t;
1955 next += t;
1956
1957 tmp_reg = fsl_readl(&dr_regs->deviceaddr);
1958 t = scnprintf(next, size,
1959 "USB Device Address Reg:" "Device Addr is 0x%x\n\n",
1960 (tmp_reg & USB_DEVICE_ADDRESS_MASK));
1961 size -= t;
1962 next += t;
1963
1964 tmp_reg = fsl_readl(&dr_regs->endpointlistaddr);
1965 t = scnprintf(next, size,
1966 "USB Endpoint List Address Reg:"
1967 "Device Addr is 0x%x\n\n",
1968 (tmp_reg & USB_EP_LIST_ADDRESS_MASK));
1969 size -= t;
1970 next += t;
1971
1972 tmp_reg = fsl_readl(&dr_regs->portsc1);
1973 t = scnprintf(next, size,
1974 "USB Port Status&Control Reg:\n"
1975 "Port Transceiver Type : %s" "Port Speed: %s \n"
1976 "PHY Low Power Suspend: %s" "Port Reset: %s"
1977 "Port Suspend Mode: %s \n" "Over-current Change: %s"
1978 "Port Enable/Disable Change: %s\n"
1979 "Port Enabled/Disabled: %s"
1980 "Current Connect Status: %s\n\n", ( {
1981 char *s;
1982 switch (tmp_reg & PORTSCX_PTS_FSLS) {
1983 case PORTSCX_PTS_UTMI:
1984 s = "UTMI"; break;
1985 case PORTSCX_PTS_ULPI:
1986 s = "ULPI "; break;
1987 case PORTSCX_PTS_FSLS:
1988 s = "FS/LS Serial"; break;
1989 default:
1990 s = "None"; break;
1991 }
1992 s;} ), ( {
1993 char *s;
1994 switch (tmp_reg & PORTSCX_PORT_SPEED_UNDEF) {
1995 case PORTSCX_PORT_SPEED_FULL:
1996 s = "Full Speed"; break;
1997 case PORTSCX_PORT_SPEED_LOW:
1998 s = "Low Speed"; break;
1999 case PORTSCX_PORT_SPEED_HIGH:
2000 s = "High Speed"; break;
2001 default:
2002 s = "Undefined"; break;
2003 }
2004 s;
2005 } ),
2006 (tmp_reg & PORTSCX_PHY_LOW_POWER_SPD) ?
2007 "Normal PHY mode" : "Low power mode",
2008 (tmp_reg & PORTSCX_PORT_RESET) ? "In Reset" :
2009 "Not in Reset",
2010 (tmp_reg & PORTSCX_PORT_SUSPEND) ? "In " : "Not in",
2011 (tmp_reg & PORTSCX_OVER_CURRENT_CHG) ? "Dected" :
2012 "No",
2013 (tmp_reg & PORTSCX_PORT_EN_DIS_CHANGE) ? "Disable" :
2014 "Not change",
2015 (tmp_reg & PORTSCX_PORT_ENABLE) ? "Enable" :
2016 "Not correct",
2017 (tmp_reg & PORTSCX_CURRENT_CONNECT_STATUS) ?
2018 "Attached" : "Not-Att");
2019 size -= t;
2020 next += t;
2021
2022 tmp_reg = fsl_readl(&dr_regs->usbmode);
2023 t = scnprintf(next, size,
2024 "USB Mode Reg:" "Controller Mode is : %s\n\n", ( {
2025 char *s;
2026 switch (tmp_reg & USB_MODE_CTRL_MODE_HOST) {
2027 case USB_MODE_CTRL_MODE_IDLE:
2028 s = "Idle"; break;
2029 case USB_MODE_CTRL_MODE_DEVICE:
2030 s = "Device Controller"; break;
2031 case USB_MODE_CTRL_MODE_HOST:
2032 s = "Host Controller"; break;
2033 default:
2034 s = "None"; break;
2035 }
2036 s;
2037 } ));
2038 size -= t;
2039 next += t;
2040
2041 tmp_reg = fsl_readl(&dr_regs->endptsetupstat);
2042 t = scnprintf(next, size,
2043 "Endpoint Setup Status Reg:" "SETUP on ep 0x%x\n\n",
2044 (tmp_reg & EP_SETUP_STATUS_MASK));
2045 size -= t;
2046 next += t;
2047
2048 for (i = 0; i < udc->max_ep / 2; i++) {
2049 tmp_reg = fsl_readl(&dr_regs->endptctrl[i]);
2050 t = scnprintf(next, size, "EP Ctrl Reg [0x%x]: = [0x%x]\n",
2051 i, tmp_reg);
2052 size -= t;
2053 next += t;
2054 }
2055 tmp_reg = fsl_readl(&dr_regs->endpointprime);
2056 t = scnprintf(next, size, "EP Prime Reg = [0x%x]\n", tmp_reg);
2057 size -= t;
2058 next += t;
2059
2060 tmp_reg = usb_sys_regs->snoop1;
2061 t = scnprintf(next, size, "\nSnoop1 Reg : = [0x%x]\n\n", tmp_reg);
2062 size -= t;
2063 next += t;
2064
2065 tmp_reg = usb_sys_regs->control;
2066 t = scnprintf(next, size, "General Control Reg : = [0x%x]\n\n",
2067 tmp_reg);
2068 size -= t;
2069 next += t;
2070
2071 /* ------fsl_udc, fsl_ep, fsl_request structure information ----- */
2072 ep = &udc->eps[0];
2073 t = scnprintf(next, size, "For %s Maxpkt is 0x%x index is 0x%x\n",
2074 ep->ep.name, ep_maxpacket(ep), ep_index(ep));
2075 size -= t;
2076 next += t;
2077
2078 if (list_empty(&ep->queue)) {
2079 t = scnprintf(next, size, "its req queue is empty\n\n");
2080 size -= t;
2081 next += t;
2082 } else {
2083 list_for_each_entry(req, &ep->queue, queue) {
2084 t = scnprintf(next, size,
2085 "req %p actual 0x%x length 0x%x buf %p\n",
2086 &req->req, req->req.actual,
2087 req->req.length, req->req.buf);
2088 size -= t;
2089 next += t;
2090 }
2091 }
2092 /* other gadget->eplist ep */
2093 list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
2094 if (ep->desc) {
2095 t = scnprintf(next, size,
2096 "\nFor %s Maxpkt is 0x%x "
2097 "index is 0x%x\n",
2098 ep->ep.name, ep_maxpacket(ep),
2099 ep_index(ep));
2100 size -= t;
2101 next += t;
2102
2103 if (list_empty(&ep->queue)) {
2104 t = scnprintf(next, size,
2105 "its req queue is empty\n\n");
2106 size -= t;
2107 next += t;
2108 } else {
2109 list_for_each_entry(req, &ep->queue, queue) {
2110 t = scnprintf(next, size,
2111 "req %p actual 0x%x length"
2112 "0x%x buf %p\n",
2113 &req->req, req->req.actual,
2114 req->req.length, req->req.buf);
2115 size -= t;
2116 next += t;
2117 } /* end for each_entry of ep req */
2118 } /* end for else */
2119 } /* end for if(ep->queue) */
2120 } /* end (ep->desc) */
2121
2122 spin_unlock_irqrestore(&udc->lock, flags);
2123
2124 *eof = 1;
2125 return count - size;
2126 }
2127
2128 #define create_proc_file() create_proc_read_entry(proc_filename, \
2129 0, NULL, fsl_proc_read, NULL)
2130
2131 #define remove_proc_file() remove_proc_entry(proc_filename, NULL)
2132
2133 #else /* !CONFIG_USB_GADGET_DEBUG_FILES */
2134
2135 #define create_proc_file() do {} while (0)
2136 #define remove_proc_file() do {} while (0)
2137
2138 #endif /* CONFIG_USB_GADGET_DEBUG_FILES */
2139
2140 /*-------------------------------------------------------------------------*/
2141
2142 /* Release udc structures */
2143 static void fsl_udc_release(struct device *dev)
2144 {
2145 complete(udc_controller->done);
2146 dma_free_coherent(dev, udc_controller->ep_qh_size,
2147 udc_controller->ep_qh, udc_controller->ep_qh_dma);
2148 kfree(udc_controller);
2149 }
2150
2151 /******************************************************************
2152 Internal structure setup functions
2153 *******************************************************************/
2154 /*------------------------------------------------------------------
2155 * init resource for globle controller
2156 * Return the udc handle on success or NULL on failure
2157 ------------------------------------------------------------------*/
2158 static int __init struct_udc_setup(struct fsl_udc *udc,
2159 struct platform_device *pdev)
2160 {
2161 struct fsl_usb2_platform_data *pdata;
2162 size_t size;
2163
2164 pdata = pdev->dev.platform_data;
2165 udc->phy_mode = pdata->phy_mode;
2166
2167 udc->eps = kzalloc(sizeof(struct fsl_ep) * udc->max_ep, GFP_KERNEL);
2168 if (!udc->eps) {
2169 ERR("malloc fsl_ep failed\n");
2170 return -1;
2171 }
2172
2173 /* initialized QHs, take care of alignment */
2174 size = udc->max_ep * sizeof(struct ep_queue_head);
2175 if (size < QH_ALIGNMENT)
2176 size = QH_ALIGNMENT;
2177 else if ((size % QH_ALIGNMENT) != 0) {
2178 size += QH_ALIGNMENT + 1;
2179 size &= ~(QH_ALIGNMENT - 1);
2180 }
2181 udc->ep_qh = dma_alloc_coherent(&pdev->dev, size,
2182 &udc->ep_qh_dma, GFP_KERNEL);
2183 if (!udc->ep_qh) {
2184 ERR("malloc QHs for udc failed\n");
2185 kfree(udc->eps);
2186 return -1;
2187 }
2188
2189 udc->ep_qh_size = size;
2190
2191 /* Initialize ep0 status request structure */
2192 /* FIXME: fsl_alloc_request() ignores ep argument */
2193 udc->status_req = container_of(fsl_alloc_request(NULL, GFP_KERNEL),
2194 struct fsl_req, req);
2195 /* allocate a small amount of memory to get valid address */
2196 udc->status_req->req.buf = kmalloc(8, GFP_KERNEL);
2197 udc->status_req->req.dma = virt_to_phys(udc->status_req->req.buf);
2198
2199 udc->resume_state = USB_STATE_NOTATTACHED;
2200 udc->usb_state = USB_STATE_POWERED;
2201 udc->ep0_dir = 0;
2202 udc->remote_wakeup = 0; /* default to 0 on reset */
2203 spin_lock_init(&udc->lock);
2204
2205 return 0;
2206 }
2207
2208 /*----------------------------------------------------------------
2209 * Setup the fsl_ep struct for eps
2210 * Link fsl_ep->ep to gadget->ep_list
2211 * ep0out is not used so do nothing here
2212 * ep0in should be taken care
2213 *--------------------------------------------------------------*/
2214 static int __init struct_ep_setup(struct fsl_udc *udc, unsigned char index,
2215 char *name, int link)
2216 {
2217 struct fsl_ep *ep = &udc->eps[index];
2218
2219 ep->udc = udc;
2220 strcpy(ep->name, name);
2221 ep->ep.name = ep->name;
2222
2223 ep->ep.ops = &fsl_ep_ops;
2224 ep->stopped = 0;
2225
2226 /* for ep0: maxP defined in desc
2227 * for other eps, maxP is set by epautoconfig() called by gadget layer
2228 */
2229 ep->ep.maxpacket = (unsigned short) ~0;
2230
2231 /* the queue lists any req for this ep */
2232 INIT_LIST_HEAD(&ep->queue);
2233
2234 /* gagdet.ep_list used for ep_autoconfig so no ep0 */
2235 if (link)
2236 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2237 ep->gadget = &udc->gadget;
2238 ep->qh = &udc->ep_qh[index];
2239
2240 return 0;
2241 }
2242
2243 /* Driver probe function
2244 * all intialization operations implemented here except enabling usb_intr reg
2245 * board setup should have been done in the platform code
2246 */
2247 static int __init fsl_udc_probe(struct platform_device *pdev)
2248 {
2249 struct resource *res;
2250 int ret = -ENODEV;
2251 unsigned int i;
2252 u32 dccparams;
2253
2254 if (strcmp(pdev->name, driver_name)) {
2255 VDBG("Wrong device\n");
2256 return -ENODEV;
2257 }
2258
2259 udc_controller = kzalloc(sizeof(struct fsl_udc), GFP_KERNEL);
2260 if (udc_controller == NULL) {
2261 ERR("malloc udc failed\n");
2262 return -ENOMEM;
2263 }
2264
2265 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2266 if (!res) {
2267 kfree(udc_controller);
2268 return -ENXIO;
2269 }
2270
2271 if (!request_mem_region(res->start, res->end - res->start + 1,
2272 driver_name)) {
2273 ERR("request mem region for %s failed \n", pdev->name);
2274 kfree(udc_controller);
2275 return -EBUSY;
2276 }
2277
2278 dr_regs = ioremap(res->start, res->end - res->start + 1);
2279 if (!dr_regs) {
2280 ret = -ENOMEM;
2281 goto err1;
2282 }
2283
2284 usb_sys_regs = (struct usb_sys_interface *)
2285 ((u32)dr_regs + USB_DR_SYS_OFFSET);
2286
2287 /* Read Device Controller Capability Parameters register */
2288 dccparams = fsl_readl(&dr_regs->dccparams);
2289 if (!(dccparams & DCCPARAMS_DC)) {
2290 ERR("This SOC doesn't support device role\n");
2291 ret = -ENODEV;
2292 goto err2;
2293 }
2294 /* Get max device endpoints */
2295 /* DEN is bidirectional ep number, max_ep doubles the number */
2296 udc_controller->max_ep = (dccparams & DCCPARAMS_DEN_MASK) * 2;
2297
2298 udc_controller->irq = platform_get_irq(pdev, 0);
2299 if (!udc_controller->irq) {
2300 ret = -ENODEV;
2301 goto err2;
2302 }
2303
2304 ret = request_irq(udc_controller->irq, fsl_udc_irq, IRQF_SHARED,
2305 driver_name, udc_controller);
2306 if (ret != 0) {
2307 ERR("cannot request irq %d err %d \n",
2308 udc_controller->irq, ret);
2309 goto err2;
2310 }
2311
2312 /* Initialize the udc structure including QH member and other member */
2313 if (struct_udc_setup(udc_controller, pdev)) {
2314 ERR("Can't initialize udc data structure\n");
2315 ret = -ENOMEM;
2316 goto err3;
2317 }
2318
2319 /* initialize usb hw reg except for regs for EP,
2320 * leave usbintr reg untouched */
2321 dr_controller_setup(udc_controller);
2322
2323 /* Setup gadget structure */
2324 udc_controller->gadget.ops = &fsl_gadget_ops;
2325 udc_controller->gadget.is_dualspeed = 1;
2326 udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
2327 INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
2328 udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2329 udc_controller->gadget.name = driver_name;
2330
2331 /* Setup gadget.dev and register with kernel */
2332 strcpy(udc_controller->gadget.dev.bus_id, "gadget");
2333 udc_controller->gadget.dev.release = fsl_udc_release;
2334 udc_controller->gadget.dev.parent = &pdev->dev;
2335 ret = device_register(&udc_controller->gadget.dev);
2336 if (ret < 0)
2337 goto err3;
2338
2339 /* setup QH and epctrl for ep0 */
2340 ep0_setup(udc_controller);
2341
2342 /* setup udc->eps[] for ep0 */
2343 struct_ep_setup(udc_controller, 0, "ep0", 0);
2344 /* for ep0: the desc defined here;
2345 * for other eps, gadget layer called ep_enable with defined desc
2346 */
2347 udc_controller->eps[0].desc = &fsl_ep0_desc;
2348 udc_controller->eps[0].ep.maxpacket = USB_MAX_CTRL_PAYLOAD;
2349
2350 /* setup the udc->eps[] for non-control endpoints and link
2351 * to gadget.ep_list */
2352 for (i = 1; i < (int)(udc_controller->max_ep / 2); i++) {
2353 char name[14];
2354
2355 sprintf(name, "ep%dout", i);
2356 struct_ep_setup(udc_controller, i * 2, name, 1);
2357 sprintf(name, "ep%din", i);
2358 struct_ep_setup(udc_controller, i * 2 + 1, name, 1);
2359 }
2360
2361 /* use dma_pool for TD management */
2362 udc_controller->td_pool = dma_pool_create("udc_td", &pdev->dev,
2363 sizeof(struct ep_td_struct),
2364 DTD_ALIGNMENT, UDC_DMA_BOUNDARY);
2365 if (udc_controller->td_pool == NULL) {
2366 ret = -ENOMEM;
2367 goto err4;
2368 }
2369 create_proc_file();
2370 return 0;
2371
2372 err4:
2373 device_unregister(&udc_controller->gadget.dev);
2374 err3:
2375 free_irq(udc_controller->irq, udc_controller);
2376 err2:
2377 iounmap(dr_regs);
2378 err1:
2379 release_mem_region(res->start, res->end - res->start + 1);
2380 kfree(udc_controller);
2381 return ret;
2382 }
2383
2384 /* Driver removal function
2385 * Free resources and finish pending transactions
2386 */
2387 static int __exit fsl_udc_remove(struct platform_device *pdev)
2388 {
2389 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2390
2391 DECLARE_COMPLETION(done);
2392
2393 if (!udc_controller)
2394 return -ENODEV;
2395 udc_controller->done = &done;
2396
2397 /* DR has been stopped in usb_gadget_unregister_driver() */
2398 remove_proc_file();
2399
2400 /* Free allocated memory */
2401 kfree(udc_controller->status_req->req.buf);
2402 kfree(udc_controller->status_req);
2403 kfree(udc_controller->eps);
2404
2405 dma_pool_destroy(udc_controller->td_pool);
2406 free_irq(udc_controller->irq, udc_controller);
2407 iounmap(dr_regs);
2408 release_mem_region(res->start, res->end - res->start + 1);
2409
2410 device_unregister(&udc_controller->gadget.dev);
2411 /* free udc --wait for the release() finished */
2412 wait_for_completion(&done);
2413
2414 return 0;
2415 }
2416
2417 /*-----------------------------------------------------------------
2418 * Modify Power management attributes
2419 * Used by OTG statemachine to disable gadget temporarily
2420 -----------------------------------------------------------------*/
2421 static int fsl_udc_suspend(struct platform_device *pdev, pm_message_t state)
2422 {
2423 dr_controller_stop(udc_controller);
2424 return 0;
2425 }
2426
2427 /*-----------------------------------------------------------------
2428 * Invoked on USB resume. May be called in_interrupt.
2429 * Here we start the DR controller and enable the irq
2430 *-----------------------------------------------------------------*/
2431 static int fsl_udc_resume(struct platform_device *pdev)
2432 {
2433 /* Enable DR irq reg and set controller Run */
2434 if (udc_controller->stopped) {
2435 dr_controller_setup(udc_controller);
2436 dr_controller_run(udc_controller);
2437 }
2438 udc_controller->usb_state = USB_STATE_ATTACHED;
2439 udc_controller->ep0_state = WAIT_FOR_SETUP;
2440 udc_controller->ep0_dir = 0;
2441 return 0;
2442 }
2443
2444 /*-------------------------------------------------------------------------
2445 Register entry point for the peripheral controller driver
2446 --------------------------------------------------------------------------*/
2447
2448 static struct platform_driver udc_driver = {
2449 .remove = __exit_p(fsl_udc_remove),
2450 /* these suspend and resume are not usb suspend and resume */
2451 .suspend = fsl_udc_suspend,
2452 .resume = fsl_udc_resume,
2453 .driver = {
2454 .name = (char *)driver_name,
2455 .owner = THIS_MODULE,
2456 },
2457 };
2458
2459 static int __init udc_init(void)
2460 {
2461 printk(KERN_INFO "%s (%s)\n", driver_desc, DRIVER_VERSION);
2462 return platform_driver_probe(&udc_driver, fsl_udc_probe);
2463 }
2464
2465 module_init(udc_init);
2466
2467 static void __exit udc_exit(void)
2468 {
2469 platform_driver_unregister(&udc_driver);
2470 printk("%s unregistered \n", driver_desc);
2471 }
2472
2473 module_exit(udc_exit);
2474
2475 MODULE_DESCRIPTION(DRIVER_DESC);
2476 MODULE_AUTHOR(DRIVER_AUTHOR);
2477 MODULE_LICENSE("GPL");
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