?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
SFFSDR: Update to board code to support FPGA and lyrvpss drivers
[linux-davinci-sffsdr.git] / drivers / usb / gadget / fsl_usb2_udc.c
blobd8d9a52a44b34e5a517c3a8dd923478e3b88b198
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/slab.h>
27 #include <linux/init.h>
28 #include <linux/list.h>
29 #include <linux/interrupt.h>
30 #include <linux/proc_fs.h>
31 #include <linux/mm.h>
32 #include <linux/moduleparam.h>
33 #include <linux/device.h>
34 #include <linux/usb/ch9.h>
35 #include <linux/usb/gadget.h>
36 #include <linux/usb/otg.h>
37 #include <linux/dma-mapping.h>
38 #include <linux/platform_device.h>
39 #include <linux/fsl_devices.h>
40 #include <linux/dmapool.h>
41
42 #include <asm/byteorder.h>
43 #include <asm/io.h>
44 #include <asm/system.h>
45 #include <asm/unaligned.h>
46 #include <asm/dma.h>
47
48 #include "fsl_usb2_udc.h"
49
50 #define DRIVER_DESC "Freescale High-Speed USB SOC Device Controller driver"
51 #define DRIVER_AUTHOR "Li Yang/Jiang Bo"
52 #define DRIVER_VERSION "Apr 20, 2007"
53
54 #define DMA_ADDR_INVALID (~(dma_addr_t)0)
55
56 static const char driver_name[] = "fsl-usb2-udc";
57 static const char driver_desc[] = DRIVER_DESC;
58
59 static struct usb_dr_device *dr_regs;
60 static struct usb_sys_interface *usb_sys_regs;
61
62 /* it is initialized in probe() */
63 static struct fsl_udc *udc_controller = NULL;
64
65 static const struct usb_endpoint_descriptor
66 fsl_ep0_desc = {
67 .bLength = USB_DT_ENDPOINT_SIZE,
68 .bDescriptorType = USB_DT_ENDPOINT,
69 .bEndpointAddress = 0,
70 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
71 .wMaxPacketSize = USB_MAX_CTRL_PAYLOAD,
72 };
73
74 static void fsl_ep_fifo_flush(struct usb_ep *_ep);
75
76 #ifdef CONFIG_PPC32
77 #define fsl_readl(addr) in_le32(addr)
78 #define fsl_writel(val32, addr) out_le32(addr, val32)
79 #else
80 #define fsl_readl(addr) readl(addr)
81 #define fsl_writel(val32, addr) writel(val32, addr)
82 #endif
83
84 /********************************************************************
85 * Internal Used Function
86 ********************************************************************/
87 /*-----------------------------------------------------------------
88 * done() - retire a request; caller blocked irqs
89 * @status : request status to be set, only works when
90 * request is still in progress.
91 *--------------------------------------------------------------*/
92 static void done(struct fsl_ep *ep, struct fsl_req *req, int status)
93 {
94 struct fsl_udc *udc = NULL;
95 unsigned char stopped = ep->stopped;
96 struct ep_td_struct *curr_td, *next_td;
97 int j;
98
99 udc = (struct fsl_udc *)ep->udc;
100 /* Removed the req from fsl_ep->queue */
101 list_del_init(&req->queue);
102
103 /* req.status should be set as -EINPROGRESS in ep_queue() */
104 if (req->req.status == -EINPROGRESS)
105 req->req.status = status;
106 else
107 status = req->req.status;
108
109 /* Free dtd for the request */
110 next_td = req->head;
111 for (j = 0; j < req->dtd_count; j++) {
112 curr_td = next_td;
113 if (j != req->dtd_count - 1) {
114 next_td = curr_td->next_td_virt;
115 }
116 dma_pool_free(udc->td_pool, curr_td, curr_td->td_dma);
117 }
118
119 if (req->mapped) {
120 dma_unmap_single(ep->udc->gadget.dev.parent,
121 req->req.dma, req->req.length,
122 ep_is_in(ep)
123 ? DMA_TO_DEVICE
124 : DMA_FROM_DEVICE);
125 req->req.dma = DMA_ADDR_INVALID;
126 req->mapped = 0;
127 } else
128 dma_sync_single_for_cpu(ep->udc->gadget.dev.parent,
129 req->req.dma, req->req.length,
130 ep_is_in(ep)
131 ? DMA_TO_DEVICE
132 : DMA_FROM_DEVICE);
133
134 if (status && (status != -ESHUTDOWN))
135 VDBG("complete %s req %p stat %d len %u/%u",
136 ep->ep.name, &req->req, status,
137 req->req.actual, req->req.length);
138
139 ep->stopped = 1;
140
141 spin_unlock(&ep->udc->lock);
142 /* complete() is from gadget layer,
143 * eg fsg->bulk_in_complete() */
144 if (req->req.complete)
145 req->req.complete(&ep->ep, &req->req);
146
147 spin_lock(&ep->udc->lock);
148 ep->stopped = stopped;
149 }
150
151 /*-----------------------------------------------------------------
152 * nuke(): delete all requests related to this ep
153 * called with spinlock held
154 *--------------------------------------------------------------*/
155 static void nuke(struct fsl_ep *ep, int status)
156 {
157 ep->stopped = 1;
158
159 /* Flush fifo */
160 fsl_ep_fifo_flush(&ep->ep);
161
162 /* Whether this eq has request linked */
163 while (!list_empty(&ep->queue)) {
164 struct fsl_req *req = NULL;
165
166 req = list_entry(ep->queue.next, struct fsl_req, queue);
167 done(ep, req, status);
168 }
169 }
170
171 /*------------------------------------------------------------------
172 Internal Hardware related function
173 ------------------------------------------------------------------*/
174
175 static int dr_controller_setup(struct fsl_udc *udc)
176 {
177 unsigned int tmp = 0, portctrl = 0, ctrl = 0;
178 unsigned long timeout;
179 #define FSL_UDC_RESET_TIMEOUT 1000
180
181 /* Stop and reset the usb controller */
182 tmp = fsl_readl(&dr_regs->usbcmd);
183 tmp &= ~USB_CMD_RUN_STOP;
184 fsl_writel(tmp, &dr_regs->usbcmd);
185
186 tmp = fsl_readl(&dr_regs->usbcmd);
187 tmp |= USB_CMD_CTRL_RESET;
188 fsl_writel(tmp, &dr_regs->usbcmd);
189
190 /* Wait for reset to complete */
191 timeout = jiffies + FSL_UDC_RESET_TIMEOUT;
192 while (fsl_readl(&dr_regs->usbcmd) & USB_CMD_CTRL_RESET) {
193 if (time_after(jiffies, timeout)) {
194 ERR("udc reset timeout!\n");
195 return -ETIMEDOUT;
196 }
197 cpu_relax();
198 }
199
200 /* Set the controller as device mode */
201 tmp = fsl_readl(&dr_regs->usbmode);
202 tmp |= USB_MODE_CTRL_MODE_DEVICE;
203 /* Disable Setup Lockout */
204 tmp |= USB_MODE_SETUP_LOCK_OFF;
205 fsl_writel(tmp, &dr_regs->usbmode);
206
207 /* Clear the setup status */
208 fsl_writel(0, &dr_regs->usbsts);
209
210 tmp = udc->ep_qh_dma;
211 tmp &= USB_EP_LIST_ADDRESS_MASK;
212 fsl_writel(tmp, &dr_regs->endpointlistaddr);
213
214 VDBG("vir[qh_base] is %p phy[qh_base] is 0x%8x reg is 0x%8x",
215 udc->ep_qh, (int)tmp,
216 fsl_readl(&dr_regs->endpointlistaddr));
217
218 /* Config PHY interface */
219 portctrl = fsl_readl(&dr_regs->portsc1);
220 portctrl &= ~(PORTSCX_PHY_TYPE_SEL | PORTSCX_PORT_WIDTH);
221 switch (udc->phy_mode) {
222 case FSL_USB2_PHY_ULPI:
223 portctrl |= PORTSCX_PTS_ULPI;
224 break;
225 case FSL_USB2_PHY_UTMI_WIDE:
226 portctrl |= PORTSCX_PTW_16BIT;
227 /* fall through */
228 case FSL_USB2_PHY_UTMI:
229 portctrl |= PORTSCX_PTS_UTMI;
230 break;
231 case FSL_USB2_PHY_SERIAL:
232 portctrl |= PORTSCX_PTS_FSLS;
233 break;
234 default:
235 return -EINVAL;
236 }
237 fsl_writel(portctrl, &dr_regs->portsc1);
238
239 /* Config control enable i/o output, cpu endian register */
240 ctrl = __raw_readl(&usb_sys_regs->control);
241 ctrl |= USB_CTRL_IOENB;
242 __raw_writel(ctrl, &usb_sys_regs->control);
243
244 #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE)
245 /* Turn on cache snooping hardware, since some PowerPC platforms
246 * wholly rely on hardware to deal with cache coherent. */
247
248 /* Setup Snooping for all the 4GB space */
249 tmp = SNOOP_SIZE_2GB; /* starts from 0x0, size 2G */
250 __raw_writel(tmp, &usb_sys_regs->snoop1);
251 tmp |= 0x80000000; /* starts from 0x8000000, size 2G */
252 __raw_writel(tmp, &usb_sys_regs->snoop2);
253 #endif
254
255 return 0;
256 }
257
258 /* Enable DR irq and set controller to run state */
259 static void dr_controller_run(struct fsl_udc *udc)
260 {
261 u32 temp;
262
263 /* Enable DR irq reg */
264 temp = USB_INTR_INT_EN | USB_INTR_ERR_INT_EN
265 | USB_INTR_PTC_DETECT_EN | USB_INTR_RESET_EN
266 | USB_INTR_DEVICE_SUSPEND | USB_INTR_SYS_ERR_EN;
267
268 fsl_writel(temp, &dr_regs->usbintr);
269
270 /* Clear stopped bit */
271 udc->stopped = 0;
272
273 /* Set the controller as device mode */
274 temp = fsl_readl(&dr_regs->usbmode);
275 temp |= USB_MODE_CTRL_MODE_DEVICE;
276 fsl_writel(temp, &dr_regs->usbmode);
277
278 /* Set controller to Run */
279 temp = fsl_readl(&dr_regs->usbcmd);
280 temp |= USB_CMD_RUN_STOP;
281 fsl_writel(temp, &dr_regs->usbcmd);
282
283 return;
284 }
285
286 static void dr_controller_stop(struct fsl_udc *udc)
287 {
288 unsigned int tmp;
289
290 /* disable all INTR */
291 fsl_writel(0, &dr_regs->usbintr);
292
293 /* Set stopped bit for isr */
294 udc->stopped = 1;
295
296 /* disable IO output */
297 /* usb_sys_regs->control = 0; */
298
299 /* set controller to Stop */
300 tmp = fsl_readl(&dr_regs->usbcmd);
301 tmp &= ~USB_CMD_RUN_STOP;
302 fsl_writel(tmp, &dr_regs->usbcmd);
303
304 return;
305 }
306
307 static void dr_ep_setup(unsigned char ep_num, unsigned char dir,
308 unsigned char ep_type)
309 {
310 unsigned int tmp_epctrl = 0;
311
312 tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
313 if (dir) {
314 if (ep_num)
315 tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
316 tmp_epctrl |= EPCTRL_TX_ENABLE;
317 tmp_epctrl |= ((unsigned int)(ep_type)
318 << EPCTRL_TX_EP_TYPE_SHIFT);
319 } else {
320 if (ep_num)
321 tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
322 tmp_epctrl |= EPCTRL_RX_ENABLE;
323 tmp_epctrl |= ((unsigned int)(ep_type)
324 << EPCTRL_RX_EP_TYPE_SHIFT);
325 }
326
327 fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
328 }
329
330 static void
331 dr_ep_change_stall(unsigned char ep_num, unsigned char dir, int value)
332 {
333 u32 tmp_epctrl = 0;
334
335 tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
336
337 if (value) {
338 /* set the stall bit */
339 if (dir)
340 tmp_epctrl |= EPCTRL_TX_EP_STALL;
341 else
342 tmp_epctrl |= EPCTRL_RX_EP_STALL;
343 } else {
344 /* clear the stall bit and reset data toggle */
345 if (dir) {
346 tmp_epctrl &= ~EPCTRL_TX_EP_STALL;
347 tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
348 } else {
349 tmp_epctrl &= ~EPCTRL_RX_EP_STALL;
350 tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
351 }
352 }
353 fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
354 }
355
356 /* Get stall status of a specific ep
357 Return: 0: not stalled; 1:stalled */
358 static int dr_ep_get_stall(unsigned char ep_num, unsigned char dir)
359 {
360 u32 epctrl;
361
362 epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
363 if (dir)
364 return (epctrl & EPCTRL_TX_EP_STALL) ? 1 : 0;
365 else
366 return (epctrl & EPCTRL_RX_EP_STALL) ? 1 : 0;
367 }
368
369 /********************************************************************
370 Internal Structure Build up functions
371 ********************************************************************/
372
373 /*------------------------------------------------------------------
374 * struct_ep_qh_setup(): set the Endpoint Capabilites field of QH
375 * @zlt: Zero Length Termination Select (1: disable; 0: enable)
376 * @mult: Mult field
377 ------------------------------------------------------------------*/
378 static void struct_ep_qh_setup(struct fsl_udc *udc, unsigned char ep_num,
379 unsigned char dir, unsigned char ep_type,
380 unsigned int max_pkt_len,
381 unsigned int zlt, unsigned char mult)
382 {
383 struct ep_queue_head *p_QH = &udc->ep_qh[2 * ep_num + dir];
384 unsigned int tmp = 0;
385
386 /* set the Endpoint Capabilites in QH */
387 switch (ep_type) {
388 case USB_ENDPOINT_XFER_CONTROL:
389 /* Interrupt On Setup (IOS). for control ep */
390 tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
391 | EP_QUEUE_HEAD_IOS;
392 break;
393 case USB_ENDPOINT_XFER_ISOC:
394 tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
395 | (mult << EP_QUEUE_HEAD_MULT_POS);
396 break;
397 case USB_ENDPOINT_XFER_BULK:
398 case USB_ENDPOINT_XFER_INT:
399 tmp = max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS;
400 break;
401 default:
402 VDBG("error ep type is %d", ep_type);
403 return;
404 }
405 if (zlt)
406 tmp |= EP_QUEUE_HEAD_ZLT_SEL;
407
408 p_QH->max_pkt_length = cpu_to_le32(tmp);
409 p_QH->next_dtd_ptr = 1;
410 p_QH->size_ioc_int_sts = 0;
411
412 return;
413 }
414
415 /* Setup qh structure and ep register for ep0. */
416 static void ep0_setup(struct fsl_udc *udc)
417 {
418 /* the intialization of an ep includes: fields in QH, Regs,
419 * fsl_ep struct */
420 struct_ep_qh_setup(udc, 0, USB_RECV, USB_ENDPOINT_XFER_CONTROL,
421 USB_MAX_CTRL_PAYLOAD, 0, 0);
422 struct_ep_qh_setup(udc, 0, USB_SEND, USB_ENDPOINT_XFER_CONTROL,
423 USB_MAX_CTRL_PAYLOAD, 0, 0);
424 dr_ep_setup(0, USB_RECV, USB_ENDPOINT_XFER_CONTROL);
425 dr_ep_setup(0, USB_SEND, USB_ENDPOINT_XFER_CONTROL);
426
427 return;
428
429 }
430
431 /***********************************************************************
432 Endpoint Management Functions
433 ***********************************************************************/
434
435 /*-------------------------------------------------------------------------
436 * when configurations are set, or when interface settings change
437 * for example the do_set_interface() in gadget layer,
438 * the driver will enable or disable the relevant endpoints
439 * ep0 doesn't use this routine. It is always enabled.
440 -------------------------------------------------------------------------*/
441 static int fsl_ep_enable(struct usb_ep *_ep,
442 const struct usb_endpoint_descriptor *desc)
443 {
444 struct fsl_udc *udc = NULL;
445 struct fsl_ep *ep = NULL;
446 unsigned short max = 0;
447 unsigned char mult = 0, zlt;
448 int retval = -EINVAL;
449 unsigned long flags = 0;
450
451 ep = container_of(_ep, struct fsl_ep, ep);
452
453 /* catch various bogus parameters */
454 if (!_ep || !desc || ep->desc
455 || (desc->bDescriptorType != USB_DT_ENDPOINT))
456 return -EINVAL;
457
458 udc = ep->udc;
459
460 if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN))
461 return -ESHUTDOWN;
462
463 max = le16_to_cpu(desc->wMaxPacketSize);
464
465 /* Disable automatic zlp generation. Driver is reponsible to indicate
466 * explicitly through req->req.zero. This is needed to enable multi-td
467 * request. */
468 zlt = 1;
469
470 /* Assume the max packet size from gadget is always correct */
471 switch (desc->bmAttributes & 0x03) {
472 case USB_ENDPOINT_XFER_CONTROL:
473 case USB_ENDPOINT_XFER_BULK:
474 case USB_ENDPOINT_XFER_INT:
475 /* mult = 0. Execute N Transactions as demonstrated by
476 * the USB variable length packet protocol where N is
477 * computed using the Maximum Packet Length (dQH) and
478 * the Total Bytes field (dTD) */
479 mult = 0;
480 break;
481 case USB_ENDPOINT_XFER_ISOC:
482 /* Calculate transactions needed for high bandwidth iso */
483 mult = (unsigned char)(1 + ((max >> 11) & 0x03));
484 max = max & 0x8ff; /* bit 0~10 */
485 /* 3 transactions at most */
486 if (mult > 3)
487 goto en_done;
488 break;
489 default:
490 goto en_done;
491 }
492
493 spin_lock_irqsave(&udc->lock, flags);
494 ep->ep.maxpacket = max;
495 ep->desc = desc;
496 ep->stopped = 0;
497
498 /* Controller related setup */
499 /* Init EPx Queue Head (Ep Capabilites field in QH
500 * according to max, zlt, mult) */
501 struct_ep_qh_setup(udc, (unsigned char) ep_index(ep),
502 (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
503 ? USB_SEND : USB_RECV),
504 (unsigned char) (desc->bmAttributes
505 & USB_ENDPOINT_XFERTYPE_MASK),
506 max, zlt, mult);
507
508 /* Init endpoint ctrl register */
509 dr_ep_setup((unsigned char) ep_index(ep),
510 (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
511 ? USB_SEND : USB_RECV),
512 (unsigned char) (desc->bmAttributes
513 & USB_ENDPOINT_XFERTYPE_MASK));
514
515 spin_unlock_irqrestore(&udc->lock, flags);
516 retval = 0;
517
518 VDBG("enabled %s (ep%d%s) maxpacket %d",ep->ep.name,
519 ep->desc->bEndpointAddress & 0x0f,
520 (desc->bEndpointAddress & USB_DIR_IN)
521 ? "in" : "out", max);
522 en_done:
523 return retval;
524 }
525
526 /*---------------------------------------------------------------------
527 * @ep : the ep being unconfigured. May not be ep0
528 * Any pending and uncomplete req will complete with status (-ESHUTDOWN)
529 *---------------------------------------------------------------------*/
530 static int fsl_ep_disable(struct usb_ep *_ep)
531 {
532 struct fsl_udc *udc = NULL;
533 struct fsl_ep *ep = NULL;
534 unsigned long flags = 0;
535 u32 epctrl;
536 int ep_num;
537
538 ep = container_of(_ep, struct fsl_ep, ep);
539 if (!_ep || !ep->desc) {
540 VDBG("%s not enabled", _ep ? ep->ep.name : NULL);
541 return -EINVAL;
542 }
543
544 /* disable ep on controller */
545 ep_num = ep_index(ep);
546 epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
547 if (ep_is_in(ep))
548 epctrl &= ~EPCTRL_TX_ENABLE;
549 else
550 epctrl &= ~EPCTRL_RX_ENABLE;
551 fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
552
553 udc = (struct fsl_udc *)ep->udc;
554 spin_lock_irqsave(&udc->lock, flags);
555
556 /* nuke all pending requests (does flush) */
557 nuke(ep, -ESHUTDOWN);
558
559 ep->desc = NULL;
560 ep->stopped = 1;
561 spin_unlock_irqrestore(&udc->lock, flags);
562
563 VDBG("disabled %s OK", _ep->name);
564 return 0;
565 }
566
567 /*---------------------------------------------------------------------
568 * allocate a request object used by this endpoint
569 * the main operation is to insert the req->queue to the eq->queue
570 * Returns the request, or null if one could not be allocated
571 *---------------------------------------------------------------------*/
572 static struct usb_request *
573 fsl_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
574 {
575 struct fsl_req *req = NULL;
576
577 req = kzalloc(sizeof *req, gfp_flags);
578 if (!req)
579 return NULL;
580
581 req->req.dma = DMA_ADDR_INVALID;
582 INIT_LIST_HEAD(&req->queue);
583
584 return &req->req;
585 }
586
587 static void fsl_free_request(struct usb_ep *_ep, struct usb_request *_req)
588 {
589 struct fsl_req *req = NULL;
590
591 req = container_of(_req, struct fsl_req, req);
592
593 if (_req)
594 kfree(req);
595 }
596
597 /*-------------------------------------------------------------------------*/
598 static void fsl_queue_td(struct fsl_ep *ep, struct fsl_req *req)
599 {
600 int i = ep_index(ep) * 2 + ep_is_in(ep);
601 u32 temp, bitmask, tmp_stat;
602 struct ep_queue_head *dQH = &ep->udc->ep_qh[i];
603
604 /* VDBG("QH addr Register 0x%8x", dr_regs->endpointlistaddr);
605 VDBG("ep_qh[%d] addr is 0x%8x", i, (u32)&(ep->udc->ep_qh[i])); */
606
607 bitmask = ep_is_in(ep)
608 ? (1 << (ep_index(ep) + 16))
609 : (1 << (ep_index(ep)));
610
611 /* check if the pipe is empty */
612 if (!(list_empty(&ep->queue))) {
613 /* Add td to the end */
614 struct fsl_req *lastreq;
615 lastreq = list_entry(ep->queue.prev, struct fsl_req, queue);
616 lastreq->tail->next_td_ptr =
617 cpu_to_le32(req->head->td_dma & DTD_ADDR_MASK);
618 /* Read prime bit, if 1 goto done */
619 if (fsl_readl(&dr_regs->endpointprime) & bitmask)
620 goto out;
621
622 do {
623 /* Set ATDTW bit in USBCMD */
624 temp = fsl_readl(&dr_regs->usbcmd);
625 fsl_writel(temp | USB_CMD_ATDTW, &dr_regs->usbcmd);
626
627 /* Read correct status bit */
628 tmp_stat = fsl_readl(&dr_regs->endptstatus) & bitmask;
629
630 } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_ATDTW));
631
632 /* Write ATDTW bit to 0 */
633 temp = fsl_readl(&dr_regs->usbcmd);
634 fsl_writel(temp & ~USB_CMD_ATDTW, &dr_regs->usbcmd);
635
636 if (tmp_stat)
637 goto out;
638 }
639
640 /* Write dQH next pointer and terminate bit to 0 */
641 temp = req->head->td_dma & EP_QUEUE_HEAD_NEXT_POINTER_MASK;
642 dQH->next_dtd_ptr = cpu_to_le32(temp);
643
644 /* Clear active and halt bit */
645 temp = cpu_to_le32(~(EP_QUEUE_HEAD_STATUS_ACTIVE
646 | EP_QUEUE_HEAD_STATUS_HALT));
647 dQH->size_ioc_int_sts &= temp;
648
649 /* Ensure that updates to the QH will occure before priming. */
650 wmb();
651
652 /* Prime endpoint by writing 1 to ENDPTPRIME */
653 temp = ep_is_in(ep)
654 ? (1 << (ep_index(ep) + 16))
655 : (1 << (ep_index(ep)));
656 fsl_writel(temp, &dr_regs->endpointprime);
657 out:
658 return;
659 }
660
661 /* Fill in the dTD structure
662 * @req: request that the transfer belongs to
663 * @length: return actually data length of the dTD
664 * @dma: return dma address of the dTD
665 * @is_last: return flag if it is the last dTD of the request
666 * return: pointer to the built dTD */
667 static struct ep_td_struct *fsl_build_dtd(struct fsl_req *req, unsigned *length,
668 dma_addr_t *dma, int *is_last)
669 {
670 u32 swap_temp;
671 struct ep_td_struct *dtd;
672
673 /* how big will this transfer be? */
674 *length = min(req->req.length - req->req.actual,
675 (unsigned)EP_MAX_LENGTH_TRANSFER);
676
677 dtd = dma_pool_alloc(udc_controller->td_pool, GFP_KERNEL, dma);
678 if (dtd == NULL)
679 return dtd;
680
681 dtd->td_dma = *dma;
682 /* Clear reserved field */
683 swap_temp = cpu_to_le32(dtd->size_ioc_sts);
684 swap_temp &= ~DTD_RESERVED_FIELDS;
685 dtd->size_ioc_sts = cpu_to_le32(swap_temp);
686
687 /* Init all of buffer page pointers */
688 swap_temp = (u32) (req->req.dma + req->req.actual);
689 dtd->buff_ptr0 = cpu_to_le32(swap_temp);
690 dtd->buff_ptr1 = cpu_to_le32(swap_temp + 0x1000);
691 dtd->buff_ptr2 = cpu_to_le32(swap_temp + 0x2000);
692 dtd->buff_ptr3 = cpu_to_le32(swap_temp + 0x3000);
693 dtd->buff_ptr4 = cpu_to_le32(swap_temp + 0x4000);
694
695 req->req.actual += *length;
696
697 /* zlp is needed if req->req.zero is set */
698 if (req->req.zero) {
699 if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0)
700 *is_last = 1;
701 else
702 *is_last = 0;
703 } else if (req->req.length == req->req.actual)
704 *is_last = 1;
705 else
706 *is_last = 0;
707
708 if ((*is_last) == 0)
709 VDBG("multi-dtd request!");
710 /* Fill in the transfer size; set active bit */
711 swap_temp = ((*length << DTD_LENGTH_BIT_POS) | DTD_STATUS_ACTIVE);
712
713 /* Enable interrupt for the last dtd of a request */
714 if (*is_last && !req->req.no_interrupt)
715 swap_temp |= DTD_IOC;
716
717 dtd->size_ioc_sts = cpu_to_le32(swap_temp);
718
719 mb();
720
721 VDBG("length = %d address= 0x%x", *length, (int)*dma);
722
723 return dtd;
724 }
725
726 /* Generate dtd chain for a request */
727 static int fsl_req_to_dtd(struct fsl_req *req)
728 {
729 unsigned count;
730 int is_last;
731 int is_first =1;
732 struct ep_td_struct *last_dtd = NULL, *dtd;
733 dma_addr_t dma;
734
735 do {
736 dtd = fsl_build_dtd(req, &count, &dma, &is_last);
737 if (dtd == NULL)
738 return -ENOMEM;
739
740 if (is_first) {
741 is_first = 0;
742 req->head = dtd;
743 } else {
744 last_dtd->next_td_ptr = cpu_to_le32(dma);
745 last_dtd->next_td_virt = dtd;
746 }
747 last_dtd = dtd;
748
749 req->dtd_count++;
750 } while (!is_last);
751
752 dtd->next_td_ptr = cpu_to_le32(DTD_NEXT_TERMINATE);
753
754 req->tail = dtd;
755
756 return 0;
757 }
758
759 /* queues (submits) an I/O request to an endpoint */
760 static int
761 fsl_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
762 {
763 struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
764 struct fsl_req *req = container_of(_req, struct fsl_req, req);
765 struct fsl_udc *udc;
766 unsigned long flags;
767 int is_iso = 0;
768
769 /* catch various bogus parameters */
770 if (!_req || !req->req.complete || !req->req.buf
771 || !list_empty(&req->queue)) {
772 VDBG("%s, bad params", __func__);
773 return -EINVAL;
774 }
775 if (unlikely(!_ep || !ep->desc)) {
776 VDBG("%s, bad ep", __func__);
777 return -EINVAL;
778 }
779 if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
780 if (req->req.length > ep->ep.maxpacket)
781 return -EMSGSIZE;
782 is_iso = 1;
783 }
784
785 udc = ep->udc;
786 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
787 return -ESHUTDOWN;
788
789 req->ep = ep;
790
791 /* map virtual address to hardware */
792 if (req->req.dma == DMA_ADDR_INVALID) {
793 req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
794 req->req.buf,
795 req->req.length, ep_is_in(ep)
796 ? DMA_TO_DEVICE
797 : DMA_FROM_DEVICE);
798 req->mapped = 1;
799 } else {
800 dma_sync_single_for_device(ep->udc->gadget.dev.parent,
801 req->req.dma, req->req.length,
802 ep_is_in(ep)
803 ? DMA_TO_DEVICE
804 : DMA_FROM_DEVICE);
805 req->mapped = 0;
806 }
807
808 req->req.status = -EINPROGRESS;
809 req->req.actual = 0;
810 req->dtd_count = 0;
811
812 spin_lock_irqsave(&udc->lock, flags);
813
814 /* build dtds and push them to device queue */
815 if (!fsl_req_to_dtd(req)) {
816 fsl_queue_td(ep, req);
817 } else {
818 spin_unlock_irqrestore(&udc->lock, flags);
819 return -ENOMEM;
820 }
821
822 /* Update ep0 state */
823 if ((ep_index(ep) == 0))
824 udc->ep0_state = DATA_STATE_XMIT;
825
826 /* irq handler advances the queue */
827 if (req != NULL)
828 list_add_tail(&req->queue, &ep->queue);
829 spin_unlock_irqrestore(&udc->lock, flags);
830
831 return 0;
832 }
833
834 /* dequeues (cancels, unlinks) an I/O request from an endpoint */
835 static int fsl_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
836 {
837 struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
838 struct fsl_req *req;
839 unsigned long flags;
840 int ep_num, stopped, ret = 0;
841 u32 epctrl;
842
843 if (!_ep || !_req)
844 return -EINVAL;
845
846 spin_lock_irqsave(&ep->udc->lock, flags);
847 stopped = ep->stopped;
848
849 /* Stop the ep before we deal with the queue */
850 ep->stopped = 1;
851 ep_num = ep_index(ep);
852 epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
853 if (ep_is_in(ep))
854 epctrl &= ~EPCTRL_TX_ENABLE;
855 else
856 epctrl &= ~EPCTRL_RX_ENABLE;
857 fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
858
859 /* make sure it's actually queued on this endpoint */
860 list_for_each_entry(req, &ep->queue, queue) {
861 if (&req->req == _req)
862 break;
863 }
864 if (&req->req != _req) {
865 ret = -EINVAL;
866 goto out;
867 }
868
869 /* The request is in progress, or completed but not dequeued */
870 if (ep->queue.next == &req->queue) {
871 _req->status = -ECONNRESET;
872 fsl_ep_fifo_flush(_ep); /* flush current transfer */
873
874 /* The request isn't the last request in this ep queue */
875 if (req->queue.next != &ep->queue) {
876 struct ep_queue_head *qh;
877 struct fsl_req *next_req;
878
879 qh = ep->qh;
880 next_req = list_entry(req->queue.next, struct fsl_req,
881 queue);
882
883 /* Point the QH to the first TD of next request */
884 fsl_writel((u32) next_req->head, &qh->curr_dtd_ptr);
885 }
886
887 /* The request hasn't been processed, patch up the TD chain */
888 } else {
889 struct fsl_req *prev_req;
890
891 prev_req = list_entry(req->queue.prev, struct fsl_req, queue);
892 fsl_writel(fsl_readl(&req->tail->next_td_ptr),
893 &prev_req->tail->next_td_ptr);
894
895 }
896
897 done(ep, req, -ECONNRESET);
898
899 /* Enable EP */
900 out: epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
901 if (ep_is_in(ep))
902 epctrl |= EPCTRL_TX_ENABLE;
903 else
904 epctrl |= EPCTRL_RX_ENABLE;
905 fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
906 ep->stopped = stopped;
907
908 spin_unlock_irqrestore(&ep->udc->lock, flags);
909 return ret;
910 }
911
912 /*-------------------------------------------------------------------------*/
913
914 /*-----------------------------------------------------------------
915 * modify the endpoint halt feature
916 * @ep: the non-isochronous endpoint being stalled
917 * @value: 1--set halt 0--clear halt
918 * Returns zero, or a negative error code.
919 *----------------------------------------------------------------*/
920 static int fsl_ep_set_halt(struct usb_ep *_ep, int value)
921 {
922 struct fsl_ep *ep = NULL;
923 unsigned long flags = 0;
924 int status = -EOPNOTSUPP; /* operation not supported */
925 unsigned char ep_dir = 0, ep_num = 0;
926 struct fsl_udc *udc = NULL;
927
928 ep = container_of(_ep, struct fsl_ep, ep);
929 udc = ep->udc;
930 if (!_ep || !ep->desc) {
931 status = -EINVAL;
932 goto out;
933 }
934
935 if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
936 status = -EOPNOTSUPP;
937 goto out;
938 }
939
940 /* Attempt to halt IN ep will fail if any transfer requests
941 * are still queue */
942 if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
943 status = -EAGAIN;
944 goto out;
945 }
946
947 status = 0;
948 ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
949 ep_num = (unsigned char)(ep_index(ep));
950 spin_lock_irqsave(&ep->udc->lock, flags);
951 dr_ep_change_stall(ep_num, ep_dir, value);
952 spin_unlock_irqrestore(&ep->udc->lock, flags);
953
954 if (ep_index(ep) == 0) {
955 udc->ep0_state = WAIT_FOR_SETUP;
956 udc->ep0_dir = 0;
957 }
958 out:
959 VDBG(" %s %s halt stat %d", ep->ep.name,
960 value ? "set" : "clear", status);
961
962 return status;
963 }
964
965 static void fsl_ep_fifo_flush(struct usb_ep *_ep)
966 {
967 struct fsl_ep *ep;
968 int ep_num, ep_dir;
969 u32 bits;
970 unsigned long timeout;
971 #define FSL_UDC_FLUSH_TIMEOUT 1000
972
973 if (!_ep) {
974 return;
975 } else {
976 ep = container_of(_ep, struct fsl_ep, ep);
977 if (!ep->desc)
978 return;
979 }
980 ep_num = ep_index(ep);
981 ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
982
983 if (ep_num == 0)
984 bits = (1 << 16) | 1;
985 else if (ep_dir == USB_SEND)
986 bits = 1 << (16 + ep_num);
987 else
988 bits = 1 << ep_num;
989
990 timeout = jiffies + FSL_UDC_FLUSH_TIMEOUT;
991 do {
992 fsl_writel(bits, &dr_regs->endptflush);
993
994 /* Wait until flush complete */
995 while (fsl_readl(&dr_regs->endptflush)) {
996 if (time_after(jiffies, timeout)) {
997 ERR("ep flush timeout\n");
998 return;
999 }
1000 cpu_relax();
1001 }
1002 /* See if we need to flush again */
1003 } while (fsl_readl(&dr_regs->endptstatus) & bits);
1004 }
1005
1006 static struct usb_ep_ops fsl_ep_ops = {
1007 .enable = fsl_ep_enable,
1008 .disable = fsl_ep_disable,
1009
1010 .alloc_request = fsl_alloc_request,
1011 .free_request = fsl_free_request,
1012
1013 .queue = fsl_ep_queue,
1014 .dequeue = fsl_ep_dequeue,
1015
1016 .set_halt = fsl_ep_set_halt,
1017 .fifo_flush = fsl_ep_fifo_flush, /* flush fifo */
1018 };
1019
1020 /*-------------------------------------------------------------------------
1021 Gadget Driver Layer Operations
1022 -------------------------------------------------------------------------*/
1023
1024 /*----------------------------------------------------------------------
1025 * Get the current frame number (from DR frame_index Reg )
1026 *----------------------------------------------------------------------*/
1027 static int fsl_get_frame(struct usb_gadget *gadget)
1028 {
1029 return (int)(fsl_readl(&dr_regs->frindex) & USB_FRINDEX_MASKS);
1030 }
1031
1032 /*-----------------------------------------------------------------------
1033 * Tries to wake up the host connected to this gadget
1034 -----------------------------------------------------------------------*/
1035 static int fsl_wakeup(struct usb_gadget *gadget)
1036 {
1037 struct fsl_udc *udc = container_of(gadget, struct fsl_udc, gadget);
1038 u32 portsc;
1039
1040 /* Remote wakeup feature not enabled by host */
1041 if (!udc->remote_wakeup)
1042 return -ENOTSUPP;
1043
1044 portsc = fsl_readl(&dr_regs->portsc1);
1045 /* not suspended? */
1046 if (!(portsc & PORTSCX_PORT_SUSPEND))
1047 return 0;
1048 /* trigger force resume */
1049 portsc |= PORTSCX_PORT_FORCE_RESUME;
1050 fsl_writel(portsc, &dr_regs->portsc1);
1051 return 0;
1052 }
1053
1054 static int can_pullup(struct fsl_udc *udc)
1055 {
1056 return udc->driver && udc->softconnect && udc->vbus_active;
1057 }
1058
1059 /* Notify controller that VBUS is powered, Called by whatever
1060 detects VBUS sessions */
1061 static int fsl_vbus_session(struct usb_gadget *gadget, int is_active)
1062 {
1063 struct fsl_udc *udc;
1064 unsigned long flags;
1065
1066 udc = container_of(gadget, struct fsl_udc, gadget);
1067 spin_lock_irqsave(&udc->lock, flags);
1068 VDBG("VBUS %s", is_active ? "on" : "off");
1069 udc->vbus_active = (is_active != 0);
1070 if (can_pullup(udc))
1071 fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
1072 &dr_regs->usbcmd);
1073 else
1074 fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
1075 &dr_regs->usbcmd);
1076 spin_unlock_irqrestore(&udc->lock, flags);
1077 return 0;
1078 }
1079
1080 /* constrain controller's VBUS power usage
1081 * This call is used by gadget drivers during SET_CONFIGURATION calls,
1082 * reporting how much power the device may consume. For example, this
1083 * could affect how quickly batteries are recharged.
1084 *
1085 * Returns zero on success, else negative errno.
1086 */
1087 static int fsl_vbus_draw(struct usb_gadget *gadget, unsigned mA)
1088 {
1089 struct fsl_udc *udc;
1090
1091 udc = container_of(gadget, struct fsl_udc, gadget);
1092 if (udc->transceiver)
1093 return otg_set_power(udc->transceiver, mA);
1094 return -ENOTSUPP;
1095 }
1096
1097 /* Change Data+ pullup status
1098 * this func is used by usb_gadget_connect/disconnet
1099 */
1100 static int fsl_pullup(struct usb_gadget *gadget, int is_on)
1101 {
1102 struct fsl_udc *udc;
1103
1104 udc = container_of(gadget, struct fsl_udc, gadget);
1105 udc->softconnect = (is_on != 0);
1106 if (can_pullup(udc))
1107 fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
1108 &dr_regs->usbcmd);
1109 else
1110 fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
1111 &dr_regs->usbcmd);
1112
1113 return 0;
1114 }
1115
1116 /* defined in gadget.h */
1117 static struct usb_gadget_ops fsl_gadget_ops = {
1118 .get_frame = fsl_get_frame,
1119 .wakeup = fsl_wakeup,
1120 /* .set_selfpowered = fsl_set_selfpowered, */ /* Always selfpowered */
1121 .vbus_session = fsl_vbus_session,
1122 .vbus_draw = fsl_vbus_draw,
1123 .pullup = fsl_pullup,
1124 };
1125
1126 /* Set protocol stall on ep0, protocol stall will automatically be cleared
1127 on new transaction */
1128 static void ep0stall(struct fsl_udc *udc)
1129 {
1130 u32 tmp;
1131
1132 /* must set tx and rx to stall at the same time */
1133 tmp = fsl_readl(&dr_regs->endptctrl[0]);
1134 tmp |= EPCTRL_TX_EP_STALL | EPCTRL_RX_EP_STALL;
1135 fsl_writel(tmp, &dr_regs->endptctrl[0]);
1136 udc->ep0_state = WAIT_FOR_SETUP;
1137 udc->ep0_dir = 0;
1138 }
1139
1140 /* Prime a status phase for ep0 */
1141 static int ep0_prime_status(struct fsl_udc *udc, int direction)
1142 {
1143 struct fsl_req *req = udc->status_req;
1144 struct fsl_ep *ep;
1145
1146 if (direction == EP_DIR_IN)
1147 udc->ep0_dir = USB_DIR_IN;
1148 else
1149 udc->ep0_dir = USB_DIR_OUT;
1150
1151 ep = &udc->eps[0];
1152 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1153
1154 req->ep = ep;
1155 req->req.length = 0;
1156 req->req.status = -EINPROGRESS;
1157 req->req.actual = 0;
1158 req->req.complete = NULL;
1159 req->dtd_count = 0;
1160
1161 if (fsl_req_to_dtd(req) == 0)
1162 fsl_queue_td(ep, req);
1163 else
1164 return -ENOMEM;
1165
1166 list_add_tail(&req->queue, &ep->queue);
1167
1168 return 0;
1169 }
1170
1171 static void udc_reset_ep_queue(struct fsl_udc *udc, u8 pipe)
1172 {
1173 struct fsl_ep *ep = get_ep_by_pipe(udc, pipe);
1174
1175 if (ep->name)
1176 nuke(ep, -ESHUTDOWN);
1177 }
1178
1179 /*
1180 * ch9 Set address
1181 */
1182 static void ch9setaddress(struct fsl_udc *udc, u16 value, u16 index, u16 length)
1183 {
1184 /* Save the new address to device struct */
1185 udc->device_address = (u8) value;
1186 /* Update usb state */
1187 udc->usb_state = USB_STATE_ADDRESS;
1188 /* Status phase */
1189 if (ep0_prime_status(udc, EP_DIR_IN))
1190 ep0stall(udc);
1191 }
1192
1193 /*
1194 * ch9 Get status
1195 */
1196 static void ch9getstatus(struct fsl_udc *udc, u8 request_type, u16 value,
1197 u16 index, u16 length)
1198 {
1199 u16 tmp = 0; /* Status, cpu endian */
1200 struct fsl_req *req;
1201 struct fsl_ep *ep;
1202
1203 ep = &udc->eps[0];
1204
1205 if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1206 /* Get device status */
1207 tmp = 1 << USB_DEVICE_SELF_POWERED;
1208 tmp |= udc->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP;
1209 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
1210 /* Get interface status */
1211 /* We don't have interface information in udc driver */
1212 tmp = 0;
1213 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
1214 /* Get endpoint status */
1215 struct fsl_ep *target_ep;
1216
1217 target_ep = get_ep_by_pipe(udc, get_pipe_by_windex(index));
1218
1219 /* stall if endpoint doesn't exist */
1220 if (!target_ep->desc)
1221 goto stall;
1222 tmp = dr_ep_get_stall(ep_index(target_ep), ep_is_in(target_ep))
1223 << USB_ENDPOINT_HALT;
1224 }
1225
1226 udc->ep0_dir = USB_DIR_IN;
1227 /* Borrow the per device status_req */
1228 req = udc->status_req;
1229 /* Fill in the reqest structure */
1230 *((u16 *) req->req.buf) = cpu_to_le16(tmp);
1231 req->ep = ep;
1232 req->req.length = 2;
1233 req->req.status = -EINPROGRESS;
1234 req->req.actual = 0;
1235 req->req.complete = NULL;
1236 req->dtd_count = 0;
1237
1238 /* prime the data phase */
1239 if ((fsl_req_to_dtd(req) == 0))
1240 fsl_queue_td(ep, req);
1241 else /* no mem */
1242 goto stall;
1243
1244 list_add_tail(&req->queue, &ep->queue);
1245 udc->ep0_state = DATA_STATE_XMIT;
1246 return;
1247 stall:
1248 ep0stall(udc);
1249 }
1250
1251 static void setup_received_irq(struct fsl_udc *udc,
1252 struct usb_ctrlrequest *setup)
1253 {
1254 u16 wValue = le16_to_cpu(setup->wValue);
1255 u16 wIndex = le16_to_cpu(setup->wIndex);
1256 u16 wLength = le16_to_cpu(setup->wLength);
1257
1258 udc_reset_ep_queue(udc, 0);
1259
1260 /* We process some stardard setup requests here */
1261 switch (setup->bRequest) {
1262 case USB_REQ_GET_STATUS:
1263 /* Data+Status phase from udc */
1264 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
1265 != (USB_DIR_IN | USB_TYPE_STANDARD))
1266 break;
1267 ch9getstatus(udc, setup->bRequestType, wValue, wIndex, wLength);
1268 return;
1269
1270 case USB_REQ_SET_ADDRESS:
1271 /* Status phase from udc */
1272 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD
1273 | USB_RECIP_DEVICE))
1274 break;
1275 ch9setaddress(udc, wValue, wIndex, wLength);
1276 return;
1277
1278 case USB_REQ_CLEAR_FEATURE:
1279 case USB_REQ_SET_FEATURE:
1280 /* Status phase from udc */
1281 {
1282 int rc = -EOPNOTSUPP;
1283
1284 if ((setup->bRequestType & (USB_RECIP_MASK | USB_TYPE_MASK))
1285 == (USB_RECIP_ENDPOINT | USB_TYPE_STANDARD)) {
1286 int pipe = get_pipe_by_windex(wIndex);
1287 struct fsl_ep *ep;
1288
1289 if (wValue != 0 || wLength != 0 || pipe > udc->max_ep)
1290 break;
1291 ep = get_ep_by_pipe(udc, pipe);
1292
1293 spin_unlock(&udc->lock);
1294 rc = fsl_ep_set_halt(&ep->ep,
1295 (setup->bRequest == USB_REQ_SET_FEATURE)
1296 ? 1 : 0);
1297 spin_lock(&udc->lock);
1298
1299 } else if ((setup->bRequestType & (USB_RECIP_MASK
1300 | USB_TYPE_MASK)) == (USB_RECIP_DEVICE
1301 | USB_TYPE_STANDARD)) {
1302 /* Note: The driver has not include OTG support yet.
1303 * This will be set when OTG support is added */
1304 if (!gadget_is_otg(&udc->gadget))
1305 break;
1306 else if (setup->bRequest == USB_DEVICE_B_HNP_ENABLE)
1307 udc->gadget.b_hnp_enable = 1;
1308 else if (setup->bRequest == USB_DEVICE_A_HNP_SUPPORT)
1309 udc->gadget.a_hnp_support = 1;
1310 else if (setup->bRequest ==
1311 USB_DEVICE_A_ALT_HNP_SUPPORT)
1312 udc->gadget.a_alt_hnp_support = 1;
1313 else
1314 break;
1315 rc = 0;
1316 } else
1317 break;
1318
1319 if (rc == 0) {
1320 if (ep0_prime_status(udc, EP_DIR_IN))
1321 ep0stall(udc);
1322 }
1323 return;
1324 }
1325
1326 default:
1327 break;
1328 }
1329
1330 /* Requests handled by gadget */
1331 if (wLength) {
1332 /* Data phase from gadget, status phase from udc */
1333 udc->ep0_dir = (setup->bRequestType & USB_DIR_IN)
1334 ? USB_DIR_IN : USB_DIR_OUT;
1335 spin_unlock(&udc->lock);
1336 if (udc->driver->setup(&udc->gadget,
1337 &udc->local_setup_buff) < 0)
1338 ep0stall(udc);
1339 spin_lock(&udc->lock);
1340 udc->ep0_state = (setup->bRequestType & USB_DIR_IN)
1341 ? DATA_STATE_XMIT : DATA_STATE_RECV;
1342 } else {
1343 /* No data phase, IN status from gadget */
1344 udc->ep0_dir = USB_DIR_IN;
1345 spin_unlock(&udc->lock);
1346 if (udc->driver->setup(&udc->gadget,
1347 &udc->local_setup_buff) < 0)
1348 ep0stall(udc);
1349 spin_lock(&udc->lock);
1350 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1351 }
1352 }
1353
1354 /* Process request for Data or Status phase of ep0
1355 * prime status phase if needed */
1356 static void ep0_req_complete(struct fsl_udc *udc, struct fsl_ep *ep0,
1357 struct fsl_req *req)
1358 {
1359 if (udc->usb_state == USB_STATE_ADDRESS) {
1360 /* Set the new address */
1361 u32 new_address = (u32) udc->device_address;
1362 fsl_writel(new_address << USB_DEVICE_ADDRESS_BIT_POS,
1363 &dr_regs->deviceaddr);
1364 }
1365
1366 done(ep0, req, 0);
1367
1368 switch (udc->ep0_state) {
1369 case DATA_STATE_XMIT:
1370 /* receive status phase */
1371 if (ep0_prime_status(udc, EP_DIR_OUT))
1372 ep0stall(udc);
1373 break;
1374 case DATA_STATE_RECV:
1375 /* send status phase */
1376 if (ep0_prime_status(udc, EP_DIR_IN))
1377 ep0stall(udc);
1378 break;
1379 case WAIT_FOR_OUT_STATUS:
1380 udc->ep0_state = WAIT_FOR_SETUP;
1381 break;
1382 case WAIT_FOR_SETUP:
1383 ERR("Unexpect ep0 packets\n");
1384 break;
1385 default:
1386 ep0stall(udc);
1387 break;
1388 }
1389 }
1390
1391 /* Tripwire mechanism to ensure a setup packet payload is extracted without
1392 * being corrupted by another incoming setup packet */
1393 static void tripwire_handler(struct fsl_udc *udc, u8 ep_num, u8 *buffer_ptr)
1394 {
1395 u32 temp;
1396 struct ep_queue_head *qh;
1397
1398 qh = &udc->ep_qh[ep_num * 2 + EP_DIR_OUT];
1399
1400 /* Clear bit in ENDPTSETUPSTAT */
1401 temp = fsl_readl(&dr_regs->endptsetupstat);
1402 fsl_writel(temp | (1 << ep_num), &dr_regs->endptsetupstat);
1403
1404 /* while a hazard exists when setup package arrives */
1405 do {
1406 /* Set Setup Tripwire */
1407 temp = fsl_readl(&dr_regs->usbcmd);
1408 fsl_writel(temp | USB_CMD_SUTW, &dr_regs->usbcmd);
1409
1410 /* Copy the setup packet to local buffer */
1411 memcpy(buffer_ptr, (u8 *) qh->setup_buffer, 8);
1412 } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_SUTW));
1413
1414 /* Clear Setup Tripwire */
1415 temp = fsl_readl(&dr_regs->usbcmd);
1416 fsl_writel(temp & ~USB_CMD_SUTW, &dr_regs->usbcmd);
1417 }
1418
1419 /* process-ep_req(): free the completed Tds for this req */
1420 static int process_ep_req(struct fsl_udc *udc, int pipe,
1421 struct fsl_req *curr_req)
1422 {
1423 struct ep_td_struct *curr_td;
1424 int td_complete, actual, remaining_length, j, tmp;
1425 int status = 0;
1426 int errors = 0;
1427 struct ep_queue_head *curr_qh = &udc->ep_qh[pipe];
1428 int direction = pipe % 2;
1429
1430 curr_td = curr_req->head;
1431 td_complete = 0;
1432 actual = curr_req->req.length;
1433
1434 for (j = 0; j < curr_req->dtd_count; j++) {
1435 remaining_length = (le32_to_cpu(curr_td->size_ioc_sts)
1436 & DTD_PACKET_SIZE)
1437 >> DTD_LENGTH_BIT_POS;
1438 actual -= remaining_length;
1439
1440 if ((errors = le32_to_cpu(curr_td->size_ioc_sts) &
1441 DTD_ERROR_MASK)) {
1442 if (errors & DTD_STATUS_HALTED) {
1443 ERR("dTD error %08x QH=%d\n", errors, pipe);
1444 /* Clear the errors and Halt condition */
1445 tmp = le32_to_cpu(curr_qh->size_ioc_int_sts);
1446 tmp &= ~errors;
1447 curr_qh->size_ioc_int_sts = cpu_to_le32(tmp);
1448 status = -EPIPE;
1449 /* FIXME: continue with next queued TD? */
1450
1451 break;
1452 }
1453 if (errors & DTD_STATUS_DATA_BUFF_ERR) {
1454 VDBG("Transfer overflow");
1455 status = -EPROTO;
1456 break;
1457 } else if (errors & DTD_STATUS_TRANSACTION_ERR) {
1458 VDBG("ISO error");
1459 status = -EILSEQ;
1460 break;
1461 } else
1462 ERR("Unknown error has occured (0x%x)!\n",
1463 errors);
1464
1465 } else if (le32_to_cpu(curr_td->size_ioc_sts)
1466 & DTD_STATUS_ACTIVE) {
1467 VDBG("Request not complete");
1468 status = REQ_UNCOMPLETE;
1469 return status;
1470 } else if (remaining_length) {
1471 if (direction) {
1472 VDBG("Transmit dTD remaining length not zero");
1473 status = -EPROTO;
1474 break;
1475 } else {
1476 td_complete++;
1477 break;
1478 }
1479 } else {
1480 td_complete++;
1481 VDBG("dTD transmitted successful");
1482 }
1483
1484 if (j != curr_req->dtd_count - 1)
1485 curr_td = (struct ep_td_struct *)curr_td->next_td_virt;
1486 }
1487
1488 if (status)
1489 return status;
1490
1491 curr_req->req.actual = actual;
1492
1493 return 0;
1494 }
1495
1496 /* Process a DTD completion interrupt */
1497 static void dtd_complete_irq(struct fsl_udc *udc)
1498 {
1499 u32 bit_pos;
1500 int i, ep_num, direction, bit_mask, status;
1501 struct fsl_ep *curr_ep;
1502 struct fsl_req *curr_req, *temp_req;
1503
1504 /* Clear the bits in the register */
1505 bit_pos = fsl_readl(&dr_regs->endptcomplete);
1506 fsl_writel(bit_pos, &dr_regs->endptcomplete);
1507
1508 if (!bit_pos)
1509 return;
1510
1511 for (i = 0; i < udc->max_ep * 2; i++) {
1512 ep_num = i >> 1;
1513 direction = i % 2;
1514
1515 bit_mask = 1 << (ep_num + 16 * direction);
1516
1517 if (!(bit_pos & bit_mask))
1518 continue;
1519
1520 curr_ep = get_ep_by_pipe(udc, i);
1521
1522 /* If the ep is configured */
1523 if (curr_ep->name == NULL) {
1524 WARNING("Invalid EP?");
1525 continue;
1526 }
1527
1528 /* process the req queue until an uncomplete request */
1529 list_for_each_entry_safe(curr_req, temp_req, &curr_ep->queue,
1530 queue) {
1531 status = process_ep_req(udc, i, curr_req);
1532
1533 VDBG("status of process_ep_req= %d, ep = %d",
1534 status, ep_num);
1535 if (status == REQ_UNCOMPLETE)
1536 break;
1537 /* write back status to req */
1538 curr_req->req.status = status;
1539
1540 if (ep_num == 0) {
1541 ep0_req_complete(udc, curr_ep, curr_req);
1542 break;
1543 } else
1544 done(curr_ep, curr_req, status);
1545 }
1546 }
1547 }
1548
1549 /* Process a port change interrupt */
1550 static void port_change_irq(struct fsl_udc *udc)
1551 {
1552 u32 speed;
1553
1554 /* Bus resetting is finished */
1555 if (!(fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET)) {
1556 /* Get the speed */
1557 speed = (fsl_readl(&dr_regs->portsc1)
1558 & PORTSCX_PORT_SPEED_MASK);
1559 switch (speed) {
1560 case PORTSCX_PORT_SPEED_HIGH:
1561 udc->gadget.speed = USB_SPEED_HIGH;
1562 break;
1563 case PORTSCX_PORT_SPEED_FULL:
1564 udc->gadget.speed = USB_SPEED_FULL;
1565 break;
1566 case PORTSCX_PORT_SPEED_LOW:
1567 udc->gadget.speed = USB_SPEED_LOW;
1568 break;
1569 default:
1570 udc->gadget.speed = USB_SPEED_UNKNOWN;
1571 break;
1572 }
1573 }
1574
1575 /* Update USB state */
1576 if (!udc->resume_state)
1577 udc->usb_state = USB_STATE_DEFAULT;
1578 }
1579
1580 /* Process suspend interrupt */
1581 static void suspend_irq(struct fsl_udc *udc)
1582 {
1583 udc->resume_state = udc->usb_state;
1584 udc->usb_state = USB_STATE_SUSPENDED;
1585
1586 /* report suspend to the driver, serial.c does not support this */
1587 if (udc->driver->suspend)
1588 udc->driver->suspend(&udc->gadget);
1589 }
1590
1591 static void bus_resume(struct fsl_udc *udc)
1592 {
1593 udc->usb_state = udc->resume_state;
1594 udc->resume_state = 0;
1595
1596 /* report resume to the driver, serial.c does not support this */
1597 if (udc->driver->resume)
1598 udc->driver->resume(&udc->gadget);
1599 }
1600
1601 /* Clear up all ep queues */
1602 static int reset_queues(struct fsl_udc *udc)
1603 {
1604 u8 pipe;
1605
1606 for (pipe = 0; pipe < udc->max_pipes; pipe++)
1607 udc_reset_ep_queue(udc, pipe);
1608
1609 /* report disconnect; the driver is already quiesced */
1610 spin_unlock(&udc->lock);
1611 udc->driver->disconnect(&udc->gadget);
1612 spin_lock(&udc->lock);
1613
1614 return 0;
1615 }
1616
1617 /* Process reset interrupt */
1618 static void reset_irq(struct fsl_udc *udc)
1619 {
1620 u32 temp;
1621 unsigned long timeout;
1622
1623 /* Clear the device address */
1624 temp = fsl_readl(&dr_regs->deviceaddr);
1625 fsl_writel(temp & ~USB_DEVICE_ADDRESS_MASK, &dr_regs->deviceaddr);
1626
1627 udc->device_address = 0;
1628
1629 /* Clear usb state */
1630 udc->resume_state = 0;
1631 udc->ep0_dir = 0;
1632 udc->ep0_state = WAIT_FOR_SETUP;
1633 udc->remote_wakeup = 0; /* default to 0 on reset */
1634 udc->gadget.b_hnp_enable = 0;
1635 udc->gadget.a_hnp_support = 0;
1636 udc->gadget.a_alt_hnp_support = 0;
1637
1638 /* Clear all the setup token semaphores */
1639 temp = fsl_readl(&dr_regs->endptsetupstat);
1640 fsl_writel(temp, &dr_regs->endptsetupstat);
1641
1642 /* Clear all the endpoint complete status bits */
1643 temp = fsl_readl(&dr_regs->endptcomplete);
1644 fsl_writel(temp, &dr_regs->endptcomplete);
1645
1646 timeout = jiffies + 100;
1647 while (fsl_readl(&dr_regs->endpointprime)) {
1648 /* Wait until all endptprime bits cleared */
1649 if (time_after(jiffies, timeout)) {
1650 ERR("Timeout for reset\n");
1651 break;
1652 }
1653 cpu_relax();
1654 }
1655
1656 /* Write 1s to the flush register */
1657 fsl_writel(0xffffffff, &dr_regs->endptflush);
1658
1659 if (fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET) {
1660 VDBG("Bus reset");
1661 /* Reset all the queues, include XD, dTD, EP queue
1662 * head and TR Queue */
1663 reset_queues(udc);
1664 udc->usb_state = USB_STATE_DEFAULT;
1665 } else {
1666 VDBG("Controller reset");
1667 /* initialize usb hw reg except for regs for EP, not
1668 * touch usbintr reg */
1669 dr_controller_setup(udc);
1670
1671 /* Reset all internal used Queues */
1672 reset_queues(udc);
1673
1674 ep0_setup(udc);
1675
1676 /* Enable DR IRQ reg, Set Run bit, change udc state */
1677 dr_controller_run(udc);
1678 udc->usb_state = USB_STATE_ATTACHED;
1679 }
1680 }
1681
1682 /*
1683 * USB device controller interrupt handler
1684 */
1685 static irqreturn_t fsl_udc_irq(int irq, void *_udc)
1686 {
1687 struct fsl_udc *udc = _udc;
1688 u32 irq_src;
1689 irqreturn_t status = IRQ_NONE;
1690 unsigned long flags;
1691
1692 /* Disable ISR for OTG host mode */
1693 if (udc->stopped)
1694 return IRQ_NONE;
1695 spin_lock_irqsave(&udc->lock, flags);
1696 irq_src = fsl_readl(&dr_regs->usbsts) & fsl_readl(&dr_regs->usbintr);
1697 /* Clear notification bits */
1698 fsl_writel(irq_src, &dr_regs->usbsts);
1699
1700 /* VDBG("irq_src [0x%8x]", irq_src); */
1701
1702 /* Need to resume? */
1703 if (udc->usb_state == USB_STATE_SUSPENDED)
1704 if ((fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_SUSPEND) == 0)
1705 bus_resume(udc);
1706
1707 /* USB Interrupt */
1708 if (irq_src & USB_STS_INT) {
1709 VDBG("Packet int");
1710 /* Setup package, we only support ep0 as control ep */
1711 if (fsl_readl(&dr_regs->endptsetupstat) & EP_SETUP_STATUS_EP0) {
1712 tripwire_handler(udc, 0,
1713 (u8 *) (&udc->local_setup_buff));
1714 setup_received_irq(udc, &udc->local_setup_buff);
1715 status = IRQ_HANDLED;
1716 }
1717
1718 /* completion of dtd */
1719 if (fsl_readl(&dr_regs->endptcomplete)) {
1720 dtd_complete_irq(udc);
1721 status = IRQ_HANDLED;
1722 }
1723 }
1724
1725 /* SOF (for ISO transfer) */
1726 if (irq_src & USB_STS_SOF) {
1727 status = IRQ_HANDLED;
1728 }
1729
1730 /* Port Change */
1731 if (irq_src & USB_STS_PORT_CHANGE) {
1732 port_change_irq(udc);
1733 status = IRQ_HANDLED;
1734 }
1735
1736 /* Reset Received */
1737 if (irq_src & USB_STS_RESET) {
1738 reset_irq(udc);
1739 status = IRQ_HANDLED;
1740 }
1741
1742 /* Sleep Enable (Suspend) */
1743 if (irq_src & USB_STS_SUSPEND) {
1744 suspend_irq(udc);
1745 status = IRQ_HANDLED;
1746 }
1747
1748 if (irq_src & (USB_STS_ERR | USB_STS_SYS_ERR)) {
1749 VDBG("Error IRQ %x", irq_src);
1750 }
1751
1752 spin_unlock_irqrestore(&udc->lock, flags);
1753 return status;
1754 }
1755
1756 /*----------------------------------------------------------------*
1757 * Hook to gadget drivers
1758 * Called by initialization code of gadget drivers
1759 *----------------------------------------------------------------*/
1760 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
1761 {
1762 int retval = -ENODEV;
1763 unsigned long flags = 0;
1764
1765 if (!udc_controller)
1766 return -ENODEV;
1767
1768 if (!driver || (driver->speed != USB_SPEED_FULL
1769 && driver->speed != USB_SPEED_HIGH)
1770 || !driver->bind || !driver->disconnect
1771 || !driver->setup)
1772 return -EINVAL;
1773
1774 if (udc_controller->driver)
1775 return -EBUSY;
1776
1777 /* lock is needed but whether should use this lock or another */
1778 spin_lock_irqsave(&udc_controller->lock, flags);
1779
1780 driver->driver.bus = NULL;
1781 /* hook up the driver */
1782 udc_controller->driver = driver;
1783 udc_controller->gadget.dev.driver = &driver->driver;
1784 spin_unlock_irqrestore(&udc_controller->lock, flags);
1785
1786 /* bind udc driver to gadget driver */
1787 retval = driver->bind(&udc_controller->gadget);
1788 if (retval) {
1789 VDBG("bind to %s --> %d", driver->driver.name, retval);
1790 udc_controller->gadget.dev.driver = NULL;
1791 udc_controller->driver = NULL;
1792 goto out;
1793 }
1794
1795 /* Enable DR IRQ reg and Set usbcmd reg Run bit */
1796 dr_controller_run(udc_controller);
1797 udc_controller->usb_state = USB_STATE_ATTACHED;
1798 udc_controller->ep0_state = WAIT_FOR_SETUP;
1799 udc_controller->ep0_dir = 0;
1800 printk(KERN_INFO "%s: bind to driver %s\n",
1801 udc_controller->gadget.name, driver->driver.name);
1802
1803 out:
1804 if (retval)
1805 printk("gadget driver register failed %d\n", retval);
1806 return retval;
1807 }
1808 EXPORT_SYMBOL(usb_gadget_register_driver);
1809
1810 /* Disconnect from gadget driver */
1811 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1812 {
1813 struct fsl_ep *loop_ep;
1814 unsigned long flags;
1815
1816 if (!udc_controller)
1817 return -ENODEV;
1818
1819 if (!driver || driver != udc_controller->driver || !driver->unbind)
1820 return -EINVAL;
1821
1822 if (udc_controller->transceiver)
1823 otg_set_peripheral(udc_controller->transceiver, NULL);
1824
1825 /* stop DR, disable intr */
1826 dr_controller_stop(udc_controller);
1827
1828 /* in fact, no needed */
1829 udc_controller->usb_state = USB_STATE_ATTACHED;
1830 udc_controller->ep0_state = WAIT_FOR_SETUP;
1831 udc_controller->ep0_dir = 0;
1832
1833 /* stand operation */
1834 spin_lock_irqsave(&udc_controller->lock, flags);
1835 udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
1836 nuke(&udc_controller->eps[0], -ESHUTDOWN);
1837 list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
1838 ep.ep_list)
1839 nuke(loop_ep, -ESHUTDOWN);
1840 spin_unlock_irqrestore(&udc_controller->lock, flags);
1841
1842 /* report disconnect; the controller is already quiesced */
1843 driver->disconnect(&udc_controller->gadget);
1844
1845 /* unbind gadget and unhook driver. */
1846 driver->unbind(&udc_controller->gadget);
1847 udc_controller->gadget.dev.driver = NULL;
1848 udc_controller->driver = NULL;
1849
1850 printk("unregistered gadget driver '%s'\n", driver->driver.name);
1851 return 0;
1852 }
1853 EXPORT_SYMBOL(usb_gadget_unregister_driver);
1854
1855 /*-------------------------------------------------------------------------
1856 PROC File System Support
1857 -------------------------------------------------------------------------*/
1858 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1859
1860 #include <linux/seq_file.h>
1861
1862 static const char proc_filename[] = "driver/fsl_usb2_udc";
1863
1864 static int fsl_proc_read(char *page, char **start, off_t off, int count,
1865 int *eof, void *_dev)
1866 {
1867 char *buf = page;
1868 char *next = buf;
1869 unsigned size = count;
1870 unsigned long flags;
1871 int t, i;
1872 u32 tmp_reg;
1873 struct fsl_ep *ep = NULL;
1874 struct fsl_req *req;
1875
1876 struct fsl_udc *udc = udc_controller;
1877 if (off != 0)
1878 return 0;
1879
1880 spin_lock_irqsave(&udc->lock, flags);
1881
1882 /* ------basic driver information ---- */
1883 t = scnprintf(next, size,
1884 DRIVER_DESC "\n"
1885 "%s version: %s\n"
1886 "Gadget driver: %s\n\n",
1887 driver_name, DRIVER_VERSION,
1888 udc->driver ? udc->driver->driver.name : "(none)");
1889 size -= t;
1890 next += t;
1891
1892 /* ------ DR Registers ----- */
1893 tmp_reg = fsl_readl(&dr_regs->usbcmd);
1894 t = scnprintf(next, size,
1895 "USBCMD reg:\n"
1896 "SetupTW: %d\n"
1897 "Run/Stop: %s\n\n",
1898 (tmp_reg & USB_CMD_SUTW) ? 1 : 0,
1899 (tmp_reg & USB_CMD_RUN_STOP) ? "Run" : "Stop");
1900 size -= t;
1901 next += t;
1902
1903 tmp_reg = fsl_readl(&dr_regs->usbsts);
1904 t = scnprintf(next, size,
1905 "USB Status Reg:\n"
1906 "Dr Suspend: %d Reset Received: %d System Error: %s "
1907 "USB Error Interrupt: %s\n\n",
1908 (tmp_reg & USB_STS_SUSPEND) ? 1 : 0,
1909 (tmp_reg & USB_STS_RESET) ? 1 : 0,
1910 (tmp_reg & USB_STS_SYS_ERR) ? "Err" : "Normal",
1911 (tmp_reg & USB_STS_ERR) ? "Err detected" : "No err");
1912 size -= t;
1913 next += t;
1914
1915 tmp_reg = fsl_readl(&dr_regs->usbintr);
1916 t = scnprintf(next, size,
1917 "USB Intrrupt Enable Reg:\n"
1918 "Sleep Enable: %d SOF Received Enable: %d "
1919 "Reset Enable: %d\n"
1920 "System Error Enable: %d "
1921 "Port Change Dectected Enable: %d\n"
1922 "USB Error Intr Enable: %d USB Intr Enable: %d\n\n",
1923 (tmp_reg & USB_INTR_DEVICE_SUSPEND) ? 1 : 0,
1924 (tmp_reg & USB_INTR_SOF_EN) ? 1 : 0,
1925 (tmp_reg & USB_INTR_RESET_EN) ? 1 : 0,
1926 (tmp_reg & USB_INTR_SYS_ERR_EN) ? 1 : 0,
1927 (tmp_reg & USB_INTR_PTC_DETECT_EN) ? 1 : 0,
1928 (tmp_reg & USB_INTR_ERR_INT_EN) ? 1 : 0,
1929 (tmp_reg & USB_INTR_INT_EN) ? 1 : 0);
1930 size -= t;
1931 next += t;
1932
1933 tmp_reg = fsl_readl(&dr_regs->frindex);
1934 t = scnprintf(next, size,
1935 "USB Frame Index Reg: Frame Number is 0x%x\n\n",
1936 (tmp_reg & USB_FRINDEX_MASKS));
1937 size -= t;
1938 next += t;
1939
1940 tmp_reg = fsl_readl(&dr_regs->deviceaddr);
1941 t = scnprintf(next, size,
1942 "USB Device Address Reg: Device Addr is 0x%x\n\n",
1943 (tmp_reg & USB_DEVICE_ADDRESS_MASK));
1944 size -= t;
1945 next += t;
1946
1947 tmp_reg = fsl_readl(&dr_regs->endpointlistaddr);
1948 t = scnprintf(next, size,
1949 "USB Endpoint List Address Reg: "
1950 "Device Addr is 0x%x\n\n",
1951 (tmp_reg & USB_EP_LIST_ADDRESS_MASK));
1952 size -= t;
1953 next += t;
1954
1955 tmp_reg = fsl_readl(&dr_regs->portsc1);
1956 t = scnprintf(next, size,
1957 "USB Port Status&Control Reg:\n"
1958 "Port Transceiver Type : %s Port Speed: %s\n"
1959 "PHY Low Power Suspend: %s Port Reset: %s "
1960 "Port Suspend Mode: %s\n"
1961 "Over-current Change: %s "
1962 "Port Enable/Disable Change: %s\n"
1963 "Port Enabled/Disabled: %s "
1964 "Current Connect Status: %s\n\n", ( {
1965 char *s;
1966 switch (tmp_reg & PORTSCX_PTS_FSLS) {
1967 case PORTSCX_PTS_UTMI:
1968 s = "UTMI"; break;
1969 case PORTSCX_PTS_ULPI:
1970 s = "ULPI "; break;
1971 case PORTSCX_PTS_FSLS:
1972 s = "FS/LS Serial"; break;
1973 default:
1974 s = "None"; break;
1975 }
1976 s;} ), ( {
1977 char *s;
1978 switch (tmp_reg & PORTSCX_PORT_SPEED_UNDEF) {
1979 case PORTSCX_PORT_SPEED_FULL:
1980 s = "Full Speed"; break;
1981 case PORTSCX_PORT_SPEED_LOW:
1982 s = "Low Speed"; break;
1983 case PORTSCX_PORT_SPEED_HIGH:
1984 s = "High Speed"; break;
1985 default:
1986 s = "Undefined"; break;
1987 }
1988 s;
1989 } ),
1990 (tmp_reg & PORTSCX_PHY_LOW_POWER_SPD) ?
1991 "Normal PHY mode" : "Low power mode",
1992 (tmp_reg & PORTSCX_PORT_RESET) ? "In Reset" :
1993 "Not in Reset",
1994 (tmp_reg & PORTSCX_PORT_SUSPEND) ? "In " : "Not in",
1995 (tmp_reg & PORTSCX_OVER_CURRENT_CHG) ? "Dected" :
1996 "No",
1997 (tmp_reg & PORTSCX_PORT_EN_DIS_CHANGE) ? "Disable" :
1998 "Not change",
1999 (tmp_reg & PORTSCX_PORT_ENABLE) ? "Enable" :
2000 "Not correct",
2001 (tmp_reg & PORTSCX_CURRENT_CONNECT_STATUS) ?
2002 "Attached" : "Not-Att");
2003 size -= t;
2004 next += t;
2005
2006 tmp_reg = fsl_readl(&dr_regs->usbmode);
2007 t = scnprintf(next, size,
2008 "USB Mode Reg: Controller Mode is: %s\n\n", ( {
2009 char *s;
2010 switch (tmp_reg & USB_MODE_CTRL_MODE_HOST) {
2011 case USB_MODE_CTRL_MODE_IDLE:
2012 s = "Idle"; break;
2013 case USB_MODE_CTRL_MODE_DEVICE:
2014 s = "Device Controller"; break;
2015 case USB_MODE_CTRL_MODE_HOST:
2016 s = "Host Controller"; break;
2017 default:
2018 s = "None"; break;
2019 }
2020 s;
2021 } ));
2022 size -= t;
2023 next += t;
2024
2025 tmp_reg = fsl_readl(&dr_regs->endptsetupstat);
2026 t = scnprintf(next, size,
2027 "Endpoint Setup Status Reg: SETUP on ep 0x%x\n\n",
2028 (tmp_reg & EP_SETUP_STATUS_MASK));
2029 size -= t;
2030 next += t;
2031
2032 for (i = 0; i < udc->max_ep / 2; i++) {
2033 tmp_reg = fsl_readl(&dr_regs->endptctrl[i]);
2034 t = scnprintf(next, size, "EP Ctrl Reg [0x%x]: = [0x%x]\n",
2035 i, tmp_reg);
2036 size -= t;
2037 next += t;
2038 }
2039 tmp_reg = fsl_readl(&dr_regs->endpointprime);
2040 t = scnprintf(next, size, "EP Prime Reg = [0x%x]\n\n", tmp_reg);
2041 size -= t;
2042 next += t;
2043
2044 tmp_reg = usb_sys_regs->snoop1;
2045 t = scnprintf(next, size, "Snoop1 Reg : = [0x%x]\n\n", tmp_reg);
2046 size -= t;
2047 next += t;
2048
2049 tmp_reg = usb_sys_regs->control;
2050 t = scnprintf(next, size, "General Control Reg : = [0x%x]\n\n",
2051 tmp_reg);
2052 size -= t;
2053 next += t;
2054
2055 /* ------fsl_udc, fsl_ep, fsl_request structure information ----- */
2056 ep = &udc->eps[0];
2057 t = scnprintf(next, size, "For %s Maxpkt is 0x%x index is 0x%x\n",
2058 ep->ep.name, ep_maxpacket(ep), ep_index(ep));
2059 size -= t;
2060 next += t;
2061
2062 if (list_empty(&ep->queue)) {
2063 t = scnprintf(next, size, "its req queue is empty\n\n");
2064 size -= t;
2065 next += t;
2066 } else {
2067 list_for_each_entry(req, &ep->queue, queue) {
2068 t = scnprintf(next, size,
2069 "req %p actual 0x%x length 0x%x buf %p\n",
2070 &req->req, req->req.actual,
2071 req->req.length, req->req.buf);
2072 size -= t;
2073 next += t;
2074 }
2075 }
2076 /* other gadget->eplist ep */
2077 list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
2078 if (ep->desc) {
2079 t = scnprintf(next, size,
2080 "\nFor %s Maxpkt is 0x%x "
2081 "index is 0x%x\n",
2082 ep->ep.name, ep_maxpacket(ep),
2083 ep_index(ep));
2084 size -= t;
2085 next += t;
2086
2087 if (list_empty(&ep->queue)) {
2088 t = scnprintf(next, size,
2089 "its req queue is empty\n\n");
2090 size -= t;
2091 next += t;
2092 } else {
2093 list_for_each_entry(req, &ep->queue, queue) {
2094 t = scnprintf(next, size,
2095 "req %p actual 0x%x length "
2096 "0x%x buf %p\n",
2097 &req->req, req->req.actual,
2098 req->req.length, req->req.buf);
2099 size -= t;
2100 next += t;
2101 } /* end for each_entry of ep req */
2102 } /* end for else */
2103 } /* end for if(ep->queue) */
2104 } /* end (ep->desc) */
2105
2106 spin_unlock_irqrestore(&udc->lock, flags);
2107
2108 *eof = 1;
2109 return count - size;
2110 }
2111
2112 #define create_proc_file() create_proc_read_entry(proc_filename, \
2113 0, NULL, fsl_proc_read, NULL)
2114
2115 #define remove_proc_file() remove_proc_entry(proc_filename, NULL)
2116
2117 #else /* !CONFIG_USB_GADGET_DEBUG_FILES */
2118
2119 #define create_proc_file() do {} while (0)
2120 #define remove_proc_file() do {} while (0)
2121
2122 #endif /* CONFIG_USB_GADGET_DEBUG_FILES */
2123
2124 /*-------------------------------------------------------------------------*/
2125
2126 /* Release udc structures */
2127 static void fsl_udc_release(struct device *dev)
2128 {
2129 complete(udc_controller->done);
2130 dma_free_coherent(dev, udc_controller->ep_qh_size,
2131 udc_controller->ep_qh, udc_controller->ep_qh_dma);
2132 kfree(udc_controller);
2133 }
2134
2135 /******************************************************************
2136 Internal structure setup functions
2137 *******************************************************************/
2138 /*------------------------------------------------------------------
2139 * init resource for globle controller
2140 * Return the udc handle on success or NULL on failure
2141 ------------------------------------------------------------------*/
2142 static int __init struct_udc_setup(struct fsl_udc *udc,
2143 struct platform_device *pdev)
2144 {
2145 struct fsl_usb2_platform_data *pdata;
2146 size_t size;
2147
2148 pdata = pdev->dev.platform_data;
2149 udc->phy_mode = pdata->phy_mode;
2150
2151 udc->eps = kzalloc(sizeof(struct fsl_ep) * udc->max_ep, GFP_KERNEL);
2152 if (!udc->eps) {
2153 ERR("malloc fsl_ep failed\n");
2154 return -1;
2155 }
2156
2157 /* initialized QHs, take care of alignment */
2158 size = udc->max_ep * sizeof(struct ep_queue_head);
2159 if (size < QH_ALIGNMENT)
2160 size = QH_ALIGNMENT;
2161 else if ((size % QH_ALIGNMENT) != 0) {
2162 size += QH_ALIGNMENT + 1;
2163 size &= ~(QH_ALIGNMENT - 1);
2164 }
2165 udc->ep_qh = dma_alloc_coherent(&pdev->dev, size,
2166 &udc->ep_qh_dma, GFP_KERNEL);
2167 if (!udc->ep_qh) {
2168 ERR("malloc QHs for udc failed\n");
2169 kfree(udc->eps);
2170 return -1;
2171 }
2172
2173 udc->ep_qh_size = size;
2174
2175 /* Initialize ep0 status request structure */
2176 /* FIXME: fsl_alloc_request() ignores ep argument */
2177 udc->status_req = container_of(fsl_alloc_request(NULL, GFP_KERNEL),
2178 struct fsl_req, req);
2179 /* allocate a small amount of memory to get valid address */
2180 udc->status_req->req.buf = kmalloc(8, GFP_KERNEL);
2181 udc->status_req->req.dma = virt_to_phys(udc->status_req->req.buf);
2182
2183 udc->resume_state = USB_STATE_NOTATTACHED;
2184 udc->usb_state = USB_STATE_POWERED;
2185 udc->ep0_dir = 0;
2186 udc->remote_wakeup = 0; /* default to 0 on reset */
2187
2188 return 0;
2189 }
2190
2191 /*----------------------------------------------------------------
2192 * Setup the fsl_ep struct for eps
2193 * Link fsl_ep->ep to gadget->ep_list
2194 * ep0out is not used so do nothing here
2195 * ep0in should be taken care
2196 *--------------------------------------------------------------*/
2197 static int __init struct_ep_setup(struct fsl_udc *udc, unsigned char index,
2198 char *name, int link)
2199 {
2200 struct fsl_ep *ep = &udc->eps[index];
2201
2202 ep->udc = udc;
2203 strcpy(ep->name, name);
2204 ep->ep.name = ep->name;
2205
2206 ep->ep.ops = &fsl_ep_ops;
2207 ep->stopped = 0;
2208
2209 /* for ep0: maxP defined in desc
2210 * for other eps, maxP is set by epautoconfig() called by gadget layer
2211 */
2212 ep->ep.maxpacket = (unsigned short) ~0;
2213
2214 /* the queue lists any req for this ep */
2215 INIT_LIST_HEAD(&ep->queue);
2216
2217 /* gagdet.ep_list used for ep_autoconfig so no ep0 */
2218 if (link)
2219 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2220 ep->gadget = &udc->gadget;
2221 ep->qh = &udc->ep_qh[index];
2222
2223 return 0;
2224 }
2225
2226 /* Driver probe function
2227 * all intialization operations implemented here except enabling usb_intr reg
2228 * board setup should have been done in the platform code
2229 */
2230 static int __init fsl_udc_probe(struct platform_device *pdev)
2231 {
2232 struct resource *res;
2233 int ret = -ENODEV;
2234 unsigned int i;
2235 u32 dccparams;
2236
2237 if (strcmp(pdev->name, driver_name)) {
2238 VDBG("Wrong device");
2239 return -ENODEV;
2240 }
2241
2242 udc_controller = kzalloc(sizeof(struct fsl_udc), GFP_KERNEL);
2243 if (udc_controller == NULL) {
2244 ERR("malloc udc failed\n");
2245 return -ENOMEM;
2246 }
2247
2248 spin_lock_init(&udc_controller->lock);
2249 udc_controller->stopped = 1;
2250
2251 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2252 if (!res) {
2253 ret = -ENXIO;
2254 goto err_kfree;
2255 }
2256
2257 if (!request_mem_region(res->start, res->end - res->start + 1,
2258 driver_name)) {
2259 ERR("request mem region for %s failed\n", pdev->name);
2260 ret = -EBUSY;
2261 goto err_kfree;
2262 }
2263
2264 dr_regs = ioremap(res->start, res->end - res->start + 1);
2265 if (!dr_regs) {
2266 ret = -ENOMEM;
2267 goto err_release_mem_region;
2268 }
2269
2270 usb_sys_regs = (struct usb_sys_interface *)
2271 ((u32)dr_regs + USB_DR_SYS_OFFSET);
2272
2273 /* Read Device Controller Capability Parameters register */
2274 dccparams = fsl_readl(&dr_regs->dccparams);
2275 if (!(dccparams & DCCPARAMS_DC)) {
2276 ERR("This SOC doesn't support device role\n");
2277 ret = -ENODEV;
2278 goto err_iounmap;
2279 }
2280 /* Get max device endpoints */
2281 /* DEN is bidirectional ep number, max_ep doubles the number */
2282 udc_controller->max_ep = (dccparams & DCCPARAMS_DEN_MASK) * 2;
2283
2284 udc_controller->irq = platform_get_irq(pdev, 0);
2285 if (!udc_controller->irq) {
2286 ret = -ENODEV;
2287 goto err_iounmap;
2288 }
2289
2290 ret = request_irq(udc_controller->irq, fsl_udc_irq, IRQF_SHARED,
2291 driver_name, udc_controller);
2292 if (ret != 0) {
2293 ERR("cannot request irq %d err %d\n",
2294 udc_controller->irq, ret);
2295 goto err_iounmap;
2296 }
2297
2298 /* Initialize the udc structure including QH member and other member */
2299 if (struct_udc_setup(udc_controller, pdev)) {
2300 ERR("Can't initialize udc data structure\n");
2301 ret = -ENOMEM;
2302 goto err_free_irq;
2303 }
2304
2305 /* initialize usb hw reg except for regs for EP,
2306 * leave usbintr reg untouched */
2307 dr_controller_setup(udc_controller);
2308
2309 /* Setup gadget structure */
2310 udc_controller->gadget.ops = &fsl_gadget_ops;
2311 udc_controller->gadget.is_dualspeed = 1;
2312 udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
2313 INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
2314 udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2315 udc_controller->gadget.name = driver_name;
2316
2317 /* Setup gadget.dev and register with kernel */
2318 dev_set_name(&udc_controller->gadget.dev, "gadget");
2319 udc_controller->gadget.dev.release = fsl_udc_release;
2320 udc_controller->gadget.dev.parent = &pdev->dev;
2321 ret = device_register(&udc_controller->gadget.dev);
2322 if (ret < 0)
2323 goto err_free_irq;
2324
2325 /* setup QH and epctrl for ep0 */
2326 ep0_setup(udc_controller);
2327
2328 /* setup udc->eps[] for ep0 */
2329 struct_ep_setup(udc_controller, 0, "ep0", 0);
2330 /* for ep0: the desc defined here;
2331 * for other eps, gadget layer called ep_enable with defined desc
2332 */
2333 udc_controller->eps[0].desc = &fsl_ep0_desc;
2334 udc_controller->eps[0].ep.maxpacket = USB_MAX_CTRL_PAYLOAD;
2335
2336 /* setup the udc->eps[] for non-control endpoints and link
2337 * to gadget.ep_list */
2338 for (i = 1; i < (int)(udc_controller->max_ep / 2); i++) {
2339 char name[14];
2340
2341 sprintf(name, "ep%dout", i);
2342 struct_ep_setup(udc_controller, i * 2, name, 1);
2343 sprintf(name, "ep%din", i);
2344 struct_ep_setup(udc_controller, i * 2 + 1, name, 1);
2345 }
2346
2347 /* use dma_pool for TD management */
2348 udc_controller->td_pool = dma_pool_create("udc_td", &pdev->dev,
2349 sizeof(struct ep_td_struct),
2350 DTD_ALIGNMENT, UDC_DMA_BOUNDARY);
2351 if (udc_controller->td_pool == NULL) {
2352 ret = -ENOMEM;
2353 goto err_unregister;
2354 }
2355 create_proc_file();
2356 return 0;
2357
2358 err_unregister:
2359 device_unregister(&udc_controller->gadget.dev);
2360 err_free_irq:
2361 free_irq(udc_controller->irq, udc_controller);
2362 err_iounmap:
2363 iounmap(dr_regs);
2364 err_release_mem_region:
2365 release_mem_region(res->start, res->end - res->start + 1);
2366 err_kfree:
2367 kfree(udc_controller);
2368 udc_controller = NULL;
2369 return ret;
2370 }
2371
2372 /* Driver removal function
2373 * Free resources and finish pending transactions
2374 */
2375 static int __exit fsl_udc_remove(struct platform_device *pdev)
2376 {
2377 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2378
2379 DECLARE_COMPLETION(done);
2380
2381 if (!udc_controller)
2382 return -ENODEV;
2383 udc_controller->done = &done;
2384
2385 /* DR has been stopped in usb_gadget_unregister_driver() */
2386 remove_proc_file();
2387
2388 /* Free allocated memory */
2389 kfree(udc_controller->status_req->req.buf);
2390 kfree(udc_controller->status_req);
2391 kfree(udc_controller->eps);
2392
2393 dma_pool_destroy(udc_controller->td_pool);
2394 free_irq(udc_controller->irq, udc_controller);
2395 iounmap(dr_regs);
2396 release_mem_region(res->start, res->end - res->start + 1);
2397
2398 device_unregister(&udc_controller->gadget.dev);
2399 /* free udc --wait for the release() finished */
2400 wait_for_completion(&done);
2401
2402 return 0;
2403 }
2404
2405 /*-----------------------------------------------------------------
2406 * Modify Power management attributes
2407 * Used by OTG statemachine to disable gadget temporarily
2408 -----------------------------------------------------------------*/
2409 static int fsl_udc_suspend(struct platform_device *pdev, pm_message_t state)
2410 {
2411 dr_controller_stop(udc_controller);
2412 return 0;
2413 }
2414
2415 /*-----------------------------------------------------------------
2416 * Invoked on USB resume. May be called in_interrupt.
2417 * Here we start the DR controller and enable the irq
2418 *-----------------------------------------------------------------*/
2419 static int fsl_udc_resume(struct platform_device *pdev)
2420 {
2421 /* Enable DR irq reg and set controller Run */
2422 if (udc_controller->stopped) {
2423 dr_controller_setup(udc_controller);
2424 dr_controller_run(udc_controller);
2425 }
2426 udc_controller->usb_state = USB_STATE_ATTACHED;
2427 udc_controller->ep0_state = WAIT_FOR_SETUP;
2428 udc_controller->ep0_dir = 0;
2429 return 0;
2430 }
2431
2432 /*-------------------------------------------------------------------------
2433 Register entry point for the peripheral controller driver
2434 --------------------------------------------------------------------------*/
2435
2436 static struct platform_driver udc_driver = {
2437 .remove = __exit_p(fsl_udc_remove),
2438 /* these suspend and resume are not usb suspend and resume */
2439 .suspend = fsl_udc_suspend,
2440 .resume = fsl_udc_resume,
2441 .driver = {
2442 .name = (char *)driver_name,
2443 .owner = THIS_MODULE,
2444 },
2445 };
2446
2447 static int __init udc_init(void)
2448 {
2449 printk(KERN_INFO "%s (%s)\n", driver_desc, DRIVER_VERSION);
2450 return platform_driver_probe(&udc_driver, fsl_udc_probe);
2451 }
2452
2453 module_init(udc_init);
2454
2455 static void __exit udc_exit(void)
2456 {
2457 platform_driver_unregister(&udc_driver);
2458 printk("%s unregistered\n", driver_desc);
2459 }
2460
2461 module_exit(udc_exit);
2462
2463 MODULE_DESCRIPTION(DRIVER_DESC);
2464 MODULE_AUTHOR(DRIVER_AUTHOR);
2465 MODULE_LICENSE("GPL");
2466 MODULE_ALIAS("platform:fsl-usb2-udc");
Linux for the Lyrtech SFFSDR board