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Save sram context after changing MPU, DSP or core clocks
[linux-ginger.git] / drivers / usb / gadget / fsl_udc_core.c
blob42a74b8a0bb82e3dcc0ab0becf156e44db9c32a1
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 #include <linux/delay.h>
42
43 #include <asm/byteorder.h>
44 #include <asm/io.h>
45 #include <asm/system.h>
46 #include <asm/unaligned.h>
47 #include <asm/dma.h>
48
49 #include "fsl_usb2_udc.h"
50
51 #define DRIVER_DESC "Freescale High-Speed USB SOC Device Controller driver"
52 #define DRIVER_AUTHOR "Li Yang/Jiang Bo"
53 #define DRIVER_VERSION "Apr 20, 2007"
54
55 #define DMA_ADDR_INVALID (~(dma_addr_t)0)
56
57 static const char driver_name[] = "fsl-usb2-udc";
58 static const char driver_desc[] = DRIVER_DESC;
59
60 static struct usb_dr_device *dr_regs;
61 #ifndef CONFIG_ARCH_MXC
62 static struct usb_sys_interface *usb_sys_regs;
63 #endif
64
65 /* it is initialized in probe() */
66 static struct fsl_udc *udc_controller = NULL;
67
68 static const struct usb_endpoint_descriptor
69 fsl_ep0_desc = {
70 .bLength = USB_DT_ENDPOINT_SIZE,
71 .bDescriptorType = USB_DT_ENDPOINT,
72 .bEndpointAddress = 0,
73 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
74 .wMaxPacketSize = USB_MAX_CTRL_PAYLOAD,
75 };
76
77 static void fsl_ep_fifo_flush(struct usb_ep *_ep);
78
79 #ifdef CONFIG_PPC32
80 #define fsl_readl(addr) in_le32(addr)
81 #define fsl_writel(val32, addr) out_le32(addr, val32)
82 #else
83 #define fsl_readl(addr) readl(addr)
84 #define fsl_writel(val32, addr) writel(val32, addr)
85 #endif
86
87 /********************************************************************
88 * Internal Used Function
89 ********************************************************************/
90 /*-----------------------------------------------------------------
91 * done() - retire a request; caller blocked irqs
92 * @status : request status to be set, only works when
93 * request is still in progress.
94 *--------------------------------------------------------------*/
95 static void done(struct fsl_ep *ep, struct fsl_req *req, int status)
96 {
97 struct fsl_udc *udc = NULL;
98 unsigned char stopped = ep->stopped;
99 struct ep_td_struct *curr_td, *next_td;
100 int j;
101
102 udc = (struct fsl_udc *)ep->udc;
103 /* Removed the req from fsl_ep->queue */
104 list_del_init(&req->queue);
105
106 /* req.status should be set as -EINPROGRESS in ep_queue() */
107 if (req->req.status == -EINPROGRESS)
108 req->req.status = status;
109 else
110 status = req->req.status;
111
112 /* Free dtd for the request */
113 next_td = req->head;
114 for (j = 0; j < req->dtd_count; j++) {
115 curr_td = next_td;
116 if (j != req->dtd_count - 1) {
117 next_td = curr_td->next_td_virt;
118 }
119 dma_pool_free(udc->td_pool, curr_td, curr_td->td_dma);
120 }
121
122 if (req->mapped) {
123 dma_unmap_single(ep->udc->gadget.dev.parent,
124 req->req.dma, req->req.length,
125 ep_is_in(ep)
126 ? DMA_TO_DEVICE
127 : DMA_FROM_DEVICE);
128 req->req.dma = DMA_ADDR_INVALID;
129 req->mapped = 0;
130 } else
131 dma_sync_single_for_cpu(ep->udc->gadget.dev.parent,
132 req->req.dma, req->req.length,
133 ep_is_in(ep)
134 ? DMA_TO_DEVICE
135 : DMA_FROM_DEVICE);
136
137 if (status && (status != -ESHUTDOWN))
138 VDBG("complete %s req %p stat %d len %u/%u",
139 ep->ep.name, &req->req, status,
140 req->req.actual, req->req.length);
141
142 ep->stopped = 1;
143
144 spin_unlock(&ep->udc->lock);
145 /* complete() is from gadget layer,
146 * eg fsg->bulk_in_complete() */
147 if (req->req.complete)
148 req->req.complete(&ep->ep, &req->req);
149
150 spin_lock(&ep->udc->lock);
151 ep->stopped = stopped;
152 }
153
154 /*-----------------------------------------------------------------
155 * nuke(): delete all requests related to this ep
156 * called with spinlock held
157 *--------------------------------------------------------------*/
158 static void nuke(struct fsl_ep *ep, int status)
159 {
160 ep->stopped = 1;
161
162 /* Flush fifo */
163 fsl_ep_fifo_flush(&ep->ep);
164
165 /* Whether this eq has request linked */
166 while (!list_empty(&ep->queue)) {
167 struct fsl_req *req = NULL;
168
169 req = list_entry(ep->queue.next, struct fsl_req, queue);
170 done(ep, req, status);
171 }
172 }
173
174 /*------------------------------------------------------------------
175 Internal Hardware related function
176 ------------------------------------------------------------------*/
177
178 static int dr_controller_setup(struct fsl_udc *udc)
179 {
180 unsigned int tmp, portctrl;
181 #ifndef CONFIG_ARCH_MXC
182 unsigned int ctrl;
183 #endif
184 unsigned long timeout;
185 #define FSL_UDC_RESET_TIMEOUT 1000
186
187 /* Config PHY interface */
188 portctrl = fsl_readl(&dr_regs->portsc1);
189 portctrl &= ~(PORTSCX_PHY_TYPE_SEL | PORTSCX_PORT_WIDTH);
190 switch (udc->phy_mode) {
191 case FSL_USB2_PHY_ULPI:
192 portctrl |= PORTSCX_PTS_ULPI;
193 break;
194 case FSL_USB2_PHY_UTMI_WIDE:
195 portctrl |= PORTSCX_PTW_16BIT;
196 /* fall through */
197 case FSL_USB2_PHY_UTMI:
198 portctrl |= PORTSCX_PTS_UTMI;
199 break;
200 case FSL_USB2_PHY_SERIAL:
201 portctrl |= PORTSCX_PTS_FSLS;
202 break;
203 default:
204 return -EINVAL;
205 }
206 fsl_writel(portctrl, &dr_regs->portsc1);
207
208 /* Stop and reset the usb controller */
209 tmp = fsl_readl(&dr_regs->usbcmd);
210 tmp &= ~USB_CMD_RUN_STOP;
211 fsl_writel(tmp, &dr_regs->usbcmd);
212
213 tmp = fsl_readl(&dr_regs->usbcmd);
214 tmp |= USB_CMD_CTRL_RESET;
215 fsl_writel(tmp, &dr_regs->usbcmd);
216
217 /* Wait for reset to complete */
218 timeout = jiffies + FSL_UDC_RESET_TIMEOUT;
219 while (fsl_readl(&dr_regs->usbcmd) & USB_CMD_CTRL_RESET) {
220 if (time_after(jiffies, timeout)) {
221 ERR("udc reset timeout!\n");
222 return -ETIMEDOUT;
223 }
224 cpu_relax();
225 }
226
227 /* Set the controller as device mode */
228 tmp = fsl_readl(&dr_regs->usbmode);
229 tmp |= USB_MODE_CTRL_MODE_DEVICE;
230 /* Disable Setup Lockout */
231 tmp |= USB_MODE_SETUP_LOCK_OFF;
232 fsl_writel(tmp, &dr_regs->usbmode);
233
234 /* Clear the setup status */
235 fsl_writel(0, &dr_regs->usbsts);
236
237 tmp = udc->ep_qh_dma;
238 tmp &= USB_EP_LIST_ADDRESS_MASK;
239 fsl_writel(tmp, &dr_regs->endpointlistaddr);
240
241 VDBG("vir[qh_base] is %p phy[qh_base] is 0x%8x reg is 0x%8x",
242 udc->ep_qh, (int)tmp,
243 fsl_readl(&dr_regs->endpointlistaddr));
244
245 /* Config control enable i/o output, cpu endian register */
246 #ifndef CONFIG_ARCH_MXC
247 ctrl = __raw_readl(&usb_sys_regs->control);
248 ctrl |= USB_CTRL_IOENB;
249 __raw_writel(ctrl, &usb_sys_regs->control);
250 #endif
251
252 #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE)
253 /* Turn on cache snooping hardware, since some PowerPC platforms
254 * wholly rely on hardware to deal with cache coherent. */
255
256 /* Setup Snooping for all the 4GB space */
257 tmp = SNOOP_SIZE_2GB; /* starts from 0x0, size 2G */
258 __raw_writel(tmp, &usb_sys_regs->snoop1);
259 tmp |= 0x80000000; /* starts from 0x8000000, size 2G */
260 __raw_writel(tmp, &usb_sys_regs->snoop2);
261 #endif
262
263 return 0;
264 }
265
266 /* Enable DR irq and set controller to run state */
267 static void dr_controller_run(struct fsl_udc *udc)
268 {
269 u32 temp;
270
271 /* Enable DR irq reg */
272 temp = USB_INTR_INT_EN | USB_INTR_ERR_INT_EN
273 | USB_INTR_PTC_DETECT_EN | USB_INTR_RESET_EN
274 | USB_INTR_DEVICE_SUSPEND | USB_INTR_SYS_ERR_EN;
275
276 fsl_writel(temp, &dr_regs->usbintr);
277
278 /* Clear stopped bit */
279 udc->stopped = 0;
280
281 /* Set the controller as device mode */
282 temp = fsl_readl(&dr_regs->usbmode);
283 temp |= USB_MODE_CTRL_MODE_DEVICE;
284 fsl_writel(temp, &dr_regs->usbmode);
285
286 /* Set controller to Run */
287 temp = fsl_readl(&dr_regs->usbcmd);
288 temp |= USB_CMD_RUN_STOP;
289 fsl_writel(temp, &dr_regs->usbcmd);
290
291 return;
292 }
293
294 static void dr_controller_stop(struct fsl_udc *udc)
295 {
296 unsigned int tmp;
297
298 /* disable all INTR */
299 fsl_writel(0, &dr_regs->usbintr);
300
301 /* Set stopped bit for isr */
302 udc->stopped = 1;
303
304 /* disable IO output */
305 /* usb_sys_regs->control = 0; */
306
307 /* set controller to Stop */
308 tmp = fsl_readl(&dr_regs->usbcmd);
309 tmp &= ~USB_CMD_RUN_STOP;
310 fsl_writel(tmp, &dr_regs->usbcmd);
311
312 return;
313 }
314
315 static void dr_ep_setup(unsigned char ep_num, unsigned char dir,
316 unsigned char ep_type)
317 {
318 unsigned int tmp_epctrl = 0;
319
320 tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
321 if (dir) {
322 if (ep_num)
323 tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
324 tmp_epctrl |= EPCTRL_TX_ENABLE;
325 tmp_epctrl |= ((unsigned int)(ep_type)
326 << EPCTRL_TX_EP_TYPE_SHIFT);
327 } else {
328 if (ep_num)
329 tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
330 tmp_epctrl |= EPCTRL_RX_ENABLE;
331 tmp_epctrl |= ((unsigned int)(ep_type)
332 << EPCTRL_RX_EP_TYPE_SHIFT);
333 }
334
335 fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
336 }
337
338 static void
339 dr_ep_change_stall(unsigned char ep_num, unsigned char dir, int value)
340 {
341 u32 tmp_epctrl = 0;
342
343 tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
344
345 if (value) {
346 /* set the stall bit */
347 if (dir)
348 tmp_epctrl |= EPCTRL_TX_EP_STALL;
349 else
350 tmp_epctrl |= EPCTRL_RX_EP_STALL;
351 } else {
352 /* clear the stall bit and reset data toggle */
353 if (dir) {
354 tmp_epctrl &= ~EPCTRL_TX_EP_STALL;
355 tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
356 } else {
357 tmp_epctrl &= ~EPCTRL_RX_EP_STALL;
358 tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
359 }
360 }
361 fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
362 }
363
364 /* Get stall status of a specific ep
365 Return: 0: not stalled; 1:stalled */
366 static int dr_ep_get_stall(unsigned char ep_num, unsigned char dir)
367 {
368 u32 epctrl;
369
370 epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
371 if (dir)
372 return (epctrl & EPCTRL_TX_EP_STALL) ? 1 : 0;
373 else
374 return (epctrl & EPCTRL_RX_EP_STALL) ? 1 : 0;
375 }
376
377 /********************************************************************
378 Internal Structure Build up functions
379 ********************************************************************/
380
381 /*------------------------------------------------------------------
382 * struct_ep_qh_setup(): set the Endpoint Capabilites field of QH
383 * @zlt: Zero Length Termination Select (1: disable; 0: enable)
384 * @mult: Mult field
385 ------------------------------------------------------------------*/
386 static void struct_ep_qh_setup(struct fsl_udc *udc, unsigned char ep_num,
387 unsigned char dir, unsigned char ep_type,
388 unsigned int max_pkt_len,
389 unsigned int zlt, unsigned char mult)
390 {
391 struct ep_queue_head *p_QH = &udc->ep_qh[2 * ep_num + dir];
392 unsigned int tmp = 0;
393
394 /* set the Endpoint Capabilites in QH */
395 switch (ep_type) {
396 case USB_ENDPOINT_XFER_CONTROL:
397 /* Interrupt On Setup (IOS). for control ep */
398 tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
399 | EP_QUEUE_HEAD_IOS;
400 break;
401 case USB_ENDPOINT_XFER_ISOC:
402 tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
403 | (mult << EP_QUEUE_HEAD_MULT_POS);
404 break;
405 case USB_ENDPOINT_XFER_BULK:
406 case USB_ENDPOINT_XFER_INT:
407 tmp = max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS;
408 break;
409 default:
410 VDBG("error ep type is %d", ep_type);
411 return;
412 }
413 if (zlt)
414 tmp |= EP_QUEUE_HEAD_ZLT_SEL;
415
416 p_QH->max_pkt_length = cpu_to_le32(tmp);
417 p_QH->next_dtd_ptr = 1;
418 p_QH->size_ioc_int_sts = 0;
419
420 return;
421 }
422
423 /* Setup qh structure and ep register for ep0. */
424 static void ep0_setup(struct fsl_udc *udc)
425 {
426 /* the intialization of an ep includes: fields in QH, Regs,
427 * fsl_ep struct */
428 struct_ep_qh_setup(udc, 0, USB_RECV, USB_ENDPOINT_XFER_CONTROL,
429 USB_MAX_CTRL_PAYLOAD, 0, 0);
430 struct_ep_qh_setup(udc, 0, USB_SEND, USB_ENDPOINT_XFER_CONTROL,
431 USB_MAX_CTRL_PAYLOAD, 0, 0);
432 dr_ep_setup(0, USB_RECV, USB_ENDPOINT_XFER_CONTROL);
433 dr_ep_setup(0, USB_SEND, USB_ENDPOINT_XFER_CONTROL);
434
435 return;
436
437 }
438
439 /***********************************************************************
440 Endpoint Management Functions
441 ***********************************************************************/
442
443 /*-------------------------------------------------------------------------
444 * when configurations are set, or when interface settings change
445 * for example the do_set_interface() in gadget layer,
446 * the driver will enable or disable the relevant endpoints
447 * ep0 doesn't use this routine. It is always enabled.
448 -------------------------------------------------------------------------*/
449 static int fsl_ep_enable(struct usb_ep *_ep,
450 const struct usb_endpoint_descriptor *desc)
451 {
452 struct fsl_udc *udc = NULL;
453 struct fsl_ep *ep = NULL;
454 unsigned short max = 0;
455 unsigned char mult = 0, zlt;
456 int retval = -EINVAL;
457 unsigned long flags = 0;
458
459 ep = container_of(_ep, struct fsl_ep, ep);
460
461 /* catch various bogus parameters */
462 if (!_ep || !desc || ep->desc
463 || (desc->bDescriptorType != USB_DT_ENDPOINT))
464 return -EINVAL;
465
466 udc = ep->udc;
467
468 if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN))
469 return -ESHUTDOWN;
470
471 max = le16_to_cpu(desc->wMaxPacketSize);
472
473 /* Disable automatic zlp generation. Driver is reponsible to indicate
474 * explicitly through req->req.zero. This is needed to enable multi-td
475 * request. */
476 zlt = 1;
477
478 /* Assume the max packet size from gadget is always correct */
479 switch (desc->bmAttributes & 0x03) {
480 case USB_ENDPOINT_XFER_CONTROL:
481 case USB_ENDPOINT_XFER_BULK:
482 case USB_ENDPOINT_XFER_INT:
483 /* mult = 0. Execute N Transactions as demonstrated by
484 * the USB variable length packet protocol where N is
485 * computed using the Maximum Packet Length (dQH) and
486 * the Total Bytes field (dTD) */
487 mult = 0;
488 break;
489 case USB_ENDPOINT_XFER_ISOC:
490 /* Calculate transactions needed for high bandwidth iso */
491 mult = (unsigned char)(1 + ((max >> 11) & 0x03));
492 max = max & 0x8ff; /* bit 0~10 */
493 /* 3 transactions at most */
494 if (mult > 3)
495 goto en_done;
496 break;
497 default:
498 goto en_done;
499 }
500
501 spin_lock_irqsave(&udc->lock, flags);
502 ep->ep.maxpacket = max;
503 ep->desc = desc;
504 ep->stopped = 0;
505
506 /* Controller related setup */
507 /* Init EPx Queue Head (Ep Capabilites field in QH
508 * according to max, zlt, mult) */
509 struct_ep_qh_setup(udc, (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 max, zlt, mult);
515
516 /* Init endpoint ctrl register */
517 dr_ep_setup((unsigned char) ep_index(ep),
518 (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
519 ? USB_SEND : USB_RECV),
520 (unsigned char) (desc->bmAttributes
521 & USB_ENDPOINT_XFERTYPE_MASK));
522
523 spin_unlock_irqrestore(&udc->lock, flags);
524 retval = 0;
525
526 VDBG("enabled %s (ep%d%s) maxpacket %d",ep->ep.name,
527 ep->desc->bEndpointAddress & 0x0f,
528 (desc->bEndpointAddress & USB_DIR_IN)
529 ? "in" : "out", max);
530 en_done:
531 return retval;
532 }
533
534 /*---------------------------------------------------------------------
535 * @ep : the ep being unconfigured. May not be ep0
536 * Any pending and uncomplete req will complete with status (-ESHUTDOWN)
537 *---------------------------------------------------------------------*/
538 static int fsl_ep_disable(struct usb_ep *_ep)
539 {
540 struct fsl_udc *udc = NULL;
541 struct fsl_ep *ep = NULL;
542 unsigned long flags = 0;
543 u32 epctrl;
544 int ep_num;
545
546 ep = container_of(_ep, struct fsl_ep, ep);
547 if (!_ep || !ep->desc) {
548 VDBG("%s not enabled", _ep ? ep->ep.name : NULL);
549 return -EINVAL;
550 }
551
552 /* disable ep on controller */
553 ep_num = ep_index(ep);
554 epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
555 if (ep_is_in(ep))
556 epctrl &= ~EPCTRL_TX_ENABLE;
557 else
558 epctrl &= ~EPCTRL_RX_ENABLE;
559 fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
560
561 udc = (struct fsl_udc *)ep->udc;
562 spin_lock_irqsave(&udc->lock, flags);
563
564 /* nuke all pending requests (does flush) */
565 nuke(ep, -ESHUTDOWN);
566
567 ep->desc = NULL;
568 ep->stopped = 1;
569 spin_unlock_irqrestore(&udc->lock, flags);
570
571 VDBG("disabled %s OK", _ep->name);
572 return 0;
573 }
574
575 /*---------------------------------------------------------------------
576 * allocate a request object used by this endpoint
577 * the main operation is to insert the req->queue to the eq->queue
578 * Returns the request, or null if one could not be allocated
579 *---------------------------------------------------------------------*/
580 static struct usb_request *
581 fsl_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
582 {
583 struct fsl_req *req = NULL;
584
585 req = kzalloc(sizeof *req, gfp_flags);
586 if (!req)
587 return NULL;
588
589 req->req.dma = DMA_ADDR_INVALID;
590 INIT_LIST_HEAD(&req->queue);
591
592 return &req->req;
593 }
594
595 static void fsl_free_request(struct usb_ep *_ep, struct usb_request *_req)
596 {
597 struct fsl_req *req = NULL;
598
599 req = container_of(_req, struct fsl_req, req);
600
601 if (_req)
602 kfree(req);
603 }
604
605 /*-------------------------------------------------------------------------*/
606 static void fsl_queue_td(struct fsl_ep *ep, struct fsl_req *req)
607 {
608 int i = ep_index(ep) * 2 + ep_is_in(ep);
609 u32 temp, bitmask, tmp_stat;
610 struct ep_queue_head *dQH = &ep->udc->ep_qh[i];
611
612 /* VDBG("QH addr Register 0x%8x", dr_regs->endpointlistaddr);
613 VDBG("ep_qh[%d] addr is 0x%8x", i, (u32)&(ep->udc->ep_qh[i])); */
614
615 bitmask = ep_is_in(ep)
616 ? (1 << (ep_index(ep) + 16))
617 : (1 << (ep_index(ep)));
618
619 /* check if the pipe is empty */
620 if (!(list_empty(&ep->queue))) {
621 /* Add td to the end */
622 struct fsl_req *lastreq;
623 lastreq = list_entry(ep->queue.prev, struct fsl_req, queue);
624 lastreq->tail->next_td_ptr =
625 cpu_to_le32(req->head->td_dma & DTD_ADDR_MASK);
626 /* Read prime bit, if 1 goto done */
627 if (fsl_readl(&dr_regs->endpointprime) & bitmask)
628 goto out;
629
630 do {
631 /* Set ATDTW bit in USBCMD */
632 temp = fsl_readl(&dr_regs->usbcmd);
633 fsl_writel(temp | USB_CMD_ATDTW, &dr_regs->usbcmd);
634
635 /* Read correct status bit */
636 tmp_stat = fsl_readl(&dr_regs->endptstatus) & bitmask;
637
638 } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_ATDTW));
639
640 /* Write ATDTW bit to 0 */
641 temp = fsl_readl(&dr_regs->usbcmd);
642 fsl_writel(temp & ~USB_CMD_ATDTW, &dr_regs->usbcmd);
643
644 if (tmp_stat)
645 goto out;
646 }
647
648 /* Write dQH next pointer and terminate bit to 0 */
649 temp = req->head->td_dma & EP_QUEUE_HEAD_NEXT_POINTER_MASK;
650 dQH->next_dtd_ptr = cpu_to_le32(temp);
651
652 /* Clear active and halt bit */
653 temp = cpu_to_le32(~(EP_QUEUE_HEAD_STATUS_ACTIVE
654 | EP_QUEUE_HEAD_STATUS_HALT));
655 dQH->size_ioc_int_sts &= temp;
656
657 /* Ensure that updates to the QH will occure before priming. */
658 wmb();
659
660 /* Prime endpoint by writing 1 to ENDPTPRIME */
661 temp = ep_is_in(ep)
662 ? (1 << (ep_index(ep) + 16))
663 : (1 << (ep_index(ep)));
664 fsl_writel(temp, &dr_regs->endpointprime);
665 out:
666 return;
667 }
668
669 /* Fill in the dTD structure
670 * @req: request that the transfer belongs to
671 * @length: return actually data length of the dTD
672 * @dma: return dma address of the dTD
673 * @is_last: return flag if it is the last dTD of the request
674 * return: pointer to the built dTD */
675 static struct ep_td_struct *fsl_build_dtd(struct fsl_req *req, unsigned *length,
676 dma_addr_t *dma, int *is_last)
677 {
678 u32 swap_temp;
679 struct ep_td_struct *dtd;
680
681 /* how big will this transfer be? */
682 *length = min(req->req.length - req->req.actual,
683 (unsigned)EP_MAX_LENGTH_TRANSFER);
684
685 dtd = dma_pool_alloc(udc_controller->td_pool, GFP_KERNEL, dma);
686 if (dtd == NULL)
687 return dtd;
688
689 dtd->td_dma = *dma;
690 /* Clear reserved field */
691 swap_temp = cpu_to_le32(dtd->size_ioc_sts);
692 swap_temp &= ~DTD_RESERVED_FIELDS;
693 dtd->size_ioc_sts = cpu_to_le32(swap_temp);
694
695 /* Init all of buffer page pointers */
696 swap_temp = (u32) (req->req.dma + req->req.actual);
697 dtd->buff_ptr0 = cpu_to_le32(swap_temp);
698 dtd->buff_ptr1 = cpu_to_le32(swap_temp + 0x1000);
699 dtd->buff_ptr2 = cpu_to_le32(swap_temp + 0x2000);
700 dtd->buff_ptr3 = cpu_to_le32(swap_temp + 0x3000);
701 dtd->buff_ptr4 = cpu_to_le32(swap_temp + 0x4000);
702
703 req->req.actual += *length;
704
705 /* zlp is needed if req->req.zero is set */
706 if (req->req.zero) {
707 if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0)
708 *is_last = 1;
709 else
710 *is_last = 0;
711 } else if (req->req.length == req->req.actual)
712 *is_last = 1;
713 else
714 *is_last = 0;
715
716 if ((*is_last) == 0)
717 VDBG("multi-dtd request!");
718 /* Fill in the transfer size; set active bit */
719 swap_temp = ((*length << DTD_LENGTH_BIT_POS) | DTD_STATUS_ACTIVE);
720
721 /* Enable interrupt for the last dtd of a request */
722 if (*is_last && !req->req.no_interrupt)
723 swap_temp |= DTD_IOC;
724
725 dtd->size_ioc_sts = cpu_to_le32(swap_temp);
726
727 mb();
728
729 VDBG("length = %d address= 0x%x", *length, (int)*dma);
730
731 return dtd;
732 }
733
734 /* Generate dtd chain for a request */
735 static int fsl_req_to_dtd(struct fsl_req *req)
736 {
737 unsigned count;
738 int is_last;
739 int is_first =1;
740 struct ep_td_struct *last_dtd = NULL, *dtd;
741 dma_addr_t dma;
742
743 do {
744 dtd = fsl_build_dtd(req, &count, &dma, &is_last);
745 if (dtd == NULL)
746 return -ENOMEM;
747
748 if (is_first) {
749 is_first = 0;
750 req->head = dtd;
751 } else {
752 last_dtd->next_td_ptr = cpu_to_le32(dma);
753 last_dtd->next_td_virt = dtd;
754 }
755 last_dtd = dtd;
756
757 req->dtd_count++;
758 } while (!is_last);
759
760 dtd->next_td_ptr = cpu_to_le32(DTD_NEXT_TERMINATE);
761
762 req->tail = dtd;
763
764 return 0;
765 }
766
767 /* queues (submits) an I/O request to an endpoint */
768 static int
769 fsl_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
770 {
771 struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
772 struct fsl_req *req = container_of(_req, struct fsl_req, req);
773 struct fsl_udc *udc;
774 unsigned long flags;
775 int is_iso = 0;
776
777 /* catch various bogus parameters */
778 if (!_req || !req->req.complete || !req->req.buf
779 || !list_empty(&req->queue)) {
780 VDBG("%s, bad params", __func__);
781 return -EINVAL;
782 }
783 if (unlikely(!_ep || !ep->desc)) {
784 VDBG("%s, bad ep", __func__);
785 return -EINVAL;
786 }
787 if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
788 if (req->req.length > ep->ep.maxpacket)
789 return -EMSGSIZE;
790 is_iso = 1;
791 }
792
793 udc = ep->udc;
794 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
795 return -ESHUTDOWN;
796
797 req->ep = ep;
798
799 /* map virtual address to hardware */
800 if (req->req.dma == DMA_ADDR_INVALID) {
801 req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
802 req->req.buf,
803 req->req.length, ep_is_in(ep)
804 ? DMA_TO_DEVICE
805 : DMA_FROM_DEVICE);
806 req->mapped = 1;
807 } else {
808 dma_sync_single_for_device(ep->udc->gadget.dev.parent,
809 req->req.dma, req->req.length,
810 ep_is_in(ep)
811 ? DMA_TO_DEVICE
812 : DMA_FROM_DEVICE);
813 req->mapped = 0;
814 }
815
816 req->req.status = -EINPROGRESS;
817 req->req.actual = 0;
818 req->dtd_count = 0;
819
820 spin_lock_irqsave(&udc->lock, flags);
821
822 /* build dtds and push them to device queue */
823 if (!fsl_req_to_dtd(req)) {
824 fsl_queue_td(ep, req);
825 } else {
826 spin_unlock_irqrestore(&udc->lock, flags);
827 return -ENOMEM;
828 }
829
830 /* Update ep0 state */
831 if ((ep_index(ep) == 0))
832 udc->ep0_state = DATA_STATE_XMIT;
833
834 /* irq handler advances the queue */
835 if (req != NULL)
836 list_add_tail(&req->queue, &ep->queue);
837 spin_unlock_irqrestore(&udc->lock, flags);
838
839 return 0;
840 }
841
842 /* dequeues (cancels, unlinks) an I/O request from an endpoint */
843 static int fsl_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
844 {
845 struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
846 struct fsl_req *req;
847 unsigned long flags;
848 int ep_num, stopped, ret = 0;
849 u32 epctrl;
850
851 if (!_ep || !_req)
852 return -EINVAL;
853
854 spin_lock_irqsave(&ep->udc->lock, flags);
855 stopped = ep->stopped;
856
857 /* Stop the ep before we deal with the queue */
858 ep->stopped = 1;
859 ep_num = ep_index(ep);
860 epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
861 if (ep_is_in(ep))
862 epctrl &= ~EPCTRL_TX_ENABLE;
863 else
864 epctrl &= ~EPCTRL_RX_ENABLE;
865 fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
866
867 /* make sure it's actually queued on this endpoint */
868 list_for_each_entry(req, &ep->queue, queue) {
869 if (&req->req == _req)
870 break;
871 }
872 if (&req->req != _req) {
873 ret = -EINVAL;
874 goto out;
875 }
876
877 /* The request is in progress, or completed but not dequeued */
878 if (ep->queue.next == &req->queue) {
879 _req->status = -ECONNRESET;
880 fsl_ep_fifo_flush(_ep); /* flush current transfer */
881
882 /* The request isn't the last request in this ep queue */
883 if (req->queue.next != &ep->queue) {
884 struct ep_queue_head *qh;
885 struct fsl_req *next_req;
886
887 qh = ep->qh;
888 next_req = list_entry(req->queue.next, struct fsl_req,
889 queue);
890
891 /* Point the QH to the first TD of next request */
892 fsl_writel((u32) next_req->head, &qh->curr_dtd_ptr);
893 }
894
895 /* The request hasn't been processed, patch up the TD chain */
896 } else {
897 struct fsl_req *prev_req;
898
899 prev_req = list_entry(req->queue.prev, struct fsl_req, queue);
900 fsl_writel(fsl_readl(&req->tail->next_td_ptr),
901 &prev_req->tail->next_td_ptr);
902
903 }
904
905 done(ep, req, -ECONNRESET);
906
907 /* Enable EP */
908 out: epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
909 if (ep_is_in(ep))
910 epctrl |= EPCTRL_TX_ENABLE;
911 else
912 epctrl |= EPCTRL_RX_ENABLE;
913 fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
914 ep->stopped = stopped;
915
916 spin_unlock_irqrestore(&ep->udc->lock, flags);
917 return ret;
918 }
919
920 /*-------------------------------------------------------------------------*/
921
922 /*-----------------------------------------------------------------
923 * modify the endpoint halt feature
924 * @ep: the non-isochronous endpoint being stalled
925 * @value: 1--set halt 0--clear halt
926 * Returns zero, or a negative error code.
927 *----------------------------------------------------------------*/
928 static int fsl_ep_set_halt(struct usb_ep *_ep, int value)
929 {
930 struct fsl_ep *ep = NULL;
931 unsigned long flags = 0;
932 int status = -EOPNOTSUPP; /* operation not supported */
933 unsigned char ep_dir = 0, ep_num = 0;
934 struct fsl_udc *udc = NULL;
935
936 ep = container_of(_ep, struct fsl_ep, ep);
937 udc = ep->udc;
938 if (!_ep || !ep->desc) {
939 status = -EINVAL;
940 goto out;
941 }
942
943 if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
944 status = -EOPNOTSUPP;
945 goto out;
946 }
947
948 /* Attempt to halt IN ep will fail if any transfer requests
949 * are still queue */
950 if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
951 status = -EAGAIN;
952 goto out;
953 }
954
955 status = 0;
956 ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
957 ep_num = (unsigned char)(ep_index(ep));
958 spin_lock_irqsave(&ep->udc->lock, flags);
959 dr_ep_change_stall(ep_num, ep_dir, value);
960 spin_unlock_irqrestore(&ep->udc->lock, flags);
961
962 if (ep_index(ep) == 0) {
963 udc->ep0_state = WAIT_FOR_SETUP;
964 udc->ep0_dir = 0;
965 }
966 out:
967 VDBG(" %s %s halt stat %d", ep->ep.name,
968 value ? "set" : "clear", status);
969
970 return status;
971 }
972
973 static void fsl_ep_fifo_flush(struct usb_ep *_ep)
974 {
975 struct fsl_ep *ep;
976 int ep_num, ep_dir;
977 u32 bits;
978 unsigned long timeout;
979 #define FSL_UDC_FLUSH_TIMEOUT 1000
980
981 if (!_ep) {
982 return;
983 } else {
984 ep = container_of(_ep, struct fsl_ep, ep);
985 if (!ep->desc)
986 return;
987 }
988 ep_num = ep_index(ep);
989 ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
990
991 if (ep_num == 0)
992 bits = (1 << 16) | 1;
993 else if (ep_dir == USB_SEND)
994 bits = 1 << (16 + ep_num);
995 else
996 bits = 1 << ep_num;
997
998 timeout = jiffies + FSL_UDC_FLUSH_TIMEOUT;
999 do {
1000 fsl_writel(bits, &dr_regs->endptflush);
1001
1002 /* Wait until flush complete */
1003 while (fsl_readl(&dr_regs->endptflush)) {
1004 if (time_after(jiffies, timeout)) {
1005 ERR("ep flush timeout\n");
1006 return;
1007 }
1008 cpu_relax();
1009 }
1010 /* See if we need to flush again */
1011 } while (fsl_readl(&dr_regs->endptstatus) & bits);
1012 }
1013
1014 static struct usb_ep_ops fsl_ep_ops = {
1015 .enable = fsl_ep_enable,
1016 .disable = fsl_ep_disable,
1017
1018 .alloc_request = fsl_alloc_request,
1019 .free_request = fsl_free_request,
1020
1021 .queue = fsl_ep_queue,
1022 .dequeue = fsl_ep_dequeue,
1023
1024 .set_halt = fsl_ep_set_halt,
1025 .fifo_flush = fsl_ep_fifo_flush, /* flush fifo */
1026 };
1027
1028 /*-------------------------------------------------------------------------
1029 Gadget Driver Layer Operations
1030 -------------------------------------------------------------------------*/
1031
1032 /*----------------------------------------------------------------------
1033 * Get the current frame number (from DR frame_index Reg )
1034 *----------------------------------------------------------------------*/
1035 static int fsl_get_frame(struct usb_gadget *gadget)
1036 {
1037 return (int)(fsl_readl(&dr_regs->frindex) & USB_FRINDEX_MASKS);
1038 }
1039
1040 /*-----------------------------------------------------------------------
1041 * Tries to wake up the host connected to this gadget
1042 -----------------------------------------------------------------------*/
1043 static int fsl_wakeup(struct usb_gadget *gadget)
1044 {
1045 struct fsl_udc *udc = container_of(gadget, struct fsl_udc, gadget);
1046 u32 portsc;
1047
1048 /* Remote wakeup feature not enabled by host */
1049 if (!udc->remote_wakeup)
1050 return -ENOTSUPP;
1051
1052 portsc = fsl_readl(&dr_regs->portsc1);
1053 /* not suspended? */
1054 if (!(portsc & PORTSCX_PORT_SUSPEND))
1055 return 0;
1056 /* trigger force resume */
1057 portsc |= PORTSCX_PORT_FORCE_RESUME;
1058 fsl_writel(portsc, &dr_regs->portsc1);
1059 return 0;
1060 }
1061
1062 static int can_pullup(struct fsl_udc *udc)
1063 {
1064 return udc->driver && udc->softconnect && udc->vbus_active;
1065 }
1066
1067 /* Notify controller that VBUS is powered, Called by whatever
1068 detects VBUS sessions */
1069 static int fsl_vbus_session(struct usb_gadget *gadget, int is_active)
1070 {
1071 struct fsl_udc *udc;
1072 unsigned long flags;
1073
1074 udc = container_of(gadget, struct fsl_udc, gadget);
1075 spin_lock_irqsave(&udc->lock, flags);
1076 VDBG("VBUS %s", is_active ? "on" : "off");
1077 udc->vbus_active = (is_active != 0);
1078 if (can_pullup(udc))
1079 fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
1080 &dr_regs->usbcmd);
1081 else
1082 fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
1083 &dr_regs->usbcmd);
1084 spin_unlock_irqrestore(&udc->lock, flags);
1085 return 0;
1086 }
1087
1088 /* constrain controller's VBUS power usage
1089 * This call is used by gadget drivers during SET_CONFIGURATION calls,
1090 * reporting how much power the device may consume. For example, this
1091 * could affect how quickly batteries are recharged.
1092 *
1093 * Returns zero on success, else negative errno.
1094 */
1095 static int fsl_vbus_draw(struct usb_gadget *gadget, unsigned mA)
1096 {
1097 struct fsl_udc *udc;
1098
1099 udc = container_of(gadget, struct fsl_udc, gadget);
1100 if (udc->transceiver)
1101 return otg_set_power(udc->transceiver, mA);
1102 return -ENOTSUPP;
1103 }
1104
1105 /* Change Data+ pullup status
1106 * this func is used by usb_gadget_connect/disconnet
1107 */
1108 static int fsl_pullup(struct usb_gadget *gadget, int is_on)
1109 {
1110 struct fsl_udc *udc;
1111
1112 udc = container_of(gadget, struct fsl_udc, gadget);
1113 udc->softconnect = (is_on != 0);
1114 if (can_pullup(udc))
1115 fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
1116 &dr_regs->usbcmd);
1117 else
1118 fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
1119 &dr_regs->usbcmd);
1120
1121 return 0;
1122 }
1123
1124 /* defined in gadget.h */
1125 static struct usb_gadget_ops fsl_gadget_ops = {
1126 .get_frame = fsl_get_frame,
1127 .wakeup = fsl_wakeup,
1128 /* .set_selfpowered = fsl_set_selfpowered, */ /* Always selfpowered */
1129 .vbus_session = fsl_vbus_session,
1130 .vbus_draw = fsl_vbus_draw,
1131 .pullup = fsl_pullup,
1132 };
1133
1134 /* Set protocol stall on ep0, protocol stall will automatically be cleared
1135 on new transaction */
1136 static void ep0stall(struct fsl_udc *udc)
1137 {
1138 u32 tmp;
1139
1140 /* must set tx and rx to stall at the same time */
1141 tmp = fsl_readl(&dr_regs->endptctrl[0]);
1142 tmp |= EPCTRL_TX_EP_STALL | EPCTRL_RX_EP_STALL;
1143 fsl_writel(tmp, &dr_regs->endptctrl[0]);
1144 udc->ep0_state = WAIT_FOR_SETUP;
1145 udc->ep0_dir = 0;
1146 }
1147
1148 /* Prime a status phase for ep0 */
1149 static int ep0_prime_status(struct fsl_udc *udc, int direction)
1150 {
1151 struct fsl_req *req = udc->status_req;
1152 struct fsl_ep *ep;
1153
1154 if (direction == EP_DIR_IN)
1155 udc->ep0_dir = USB_DIR_IN;
1156 else
1157 udc->ep0_dir = USB_DIR_OUT;
1158
1159 ep = &udc->eps[0];
1160 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1161
1162 req->ep = ep;
1163 req->req.length = 0;
1164 req->req.status = -EINPROGRESS;
1165 req->req.actual = 0;
1166 req->req.complete = NULL;
1167 req->dtd_count = 0;
1168
1169 if (fsl_req_to_dtd(req) == 0)
1170 fsl_queue_td(ep, req);
1171 else
1172 return -ENOMEM;
1173
1174 list_add_tail(&req->queue, &ep->queue);
1175
1176 return 0;
1177 }
1178
1179 static void udc_reset_ep_queue(struct fsl_udc *udc, u8 pipe)
1180 {
1181 struct fsl_ep *ep = get_ep_by_pipe(udc, pipe);
1182
1183 if (ep->name)
1184 nuke(ep, -ESHUTDOWN);
1185 }
1186
1187 /*
1188 * ch9 Set address
1189 */
1190 static void ch9setaddress(struct fsl_udc *udc, u16 value, u16 index, u16 length)
1191 {
1192 /* Save the new address to device struct */
1193 udc->device_address = (u8) value;
1194 /* Update usb state */
1195 udc->usb_state = USB_STATE_ADDRESS;
1196 /* Status phase */
1197 if (ep0_prime_status(udc, EP_DIR_IN))
1198 ep0stall(udc);
1199 }
1200
1201 /*
1202 * ch9 Get status
1203 */
1204 static void ch9getstatus(struct fsl_udc *udc, u8 request_type, u16 value,
1205 u16 index, u16 length)
1206 {
1207 u16 tmp = 0; /* Status, cpu endian */
1208 struct fsl_req *req;
1209 struct fsl_ep *ep;
1210
1211 ep = &udc->eps[0];
1212
1213 if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1214 /* Get device status */
1215 tmp = 1 << USB_DEVICE_SELF_POWERED;
1216 tmp |= udc->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP;
1217 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
1218 /* Get interface status */
1219 /* We don't have interface information in udc driver */
1220 tmp = 0;
1221 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
1222 /* Get endpoint status */
1223 struct fsl_ep *target_ep;
1224
1225 target_ep = get_ep_by_pipe(udc, get_pipe_by_windex(index));
1226
1227 /* stall if endpoint doesn't exist */
1228 if (!target_ep->desc)
1229 goto stall;
1230 tmp = dr_ep_get_stall(ep_index(target_ep), ep_is_in(target_ep))
1231 << USB_ENDPOINT_HALT;
1232 }
1233
1234 udc->ep0_dir = USB_DIR_IN;
1235 /* Borrow the per device status_req */
1236 req = udc->status_req;
1237 /* Fill in the reqest structure */
1238 *((u16 *) req->req.buf) = cpu_to_le16(tmp);
1239 req->ep = ep;
1240 req->req.length = 2;
1241 req->req.status = -EINPROGRESS;
1242 req->req.actual = 0;
1243 req->req.complete = NULL;
1244 req->dtd_count = 0;
1245
1246 /* prime the data phase */
1247 if ((fsl_req_to_dtd(req) == 0))
1248 fsl_queue_td(ep, req);
1249 else /* no mem */
1250 goto stall;
1251
1252 list_add_tail(&req->queue, &ep->queue);
1253 udc->ep0_state = DATA_STATE_XMIT;
1254 return;
1255 stall:
1256 ep0stall(udc);
1257 }
1258
1259 static void setup_received_irq(struct fsl_udc *udc,
1260 struct usb_ctrlrequest *setup)
1261 {
1262 u16 wValue = le16_to_cpu(setup->wValue);
1263 u16 wIndex = le16_to_cpu(setup->wIndex);
1264 u16 wLength = le16_to_cpu(setup->wLength);
1265
1266 udc_reset_ep_queue(udc, 0);
1267
1268 /* We process some stardard setup requests here */
1269 switch (setup->bRequest) {
1270 case USB_REQ_GET_STATUS:
1271 /* Data+Status phase from udc */
1272 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
1273 != (USB_DIR_IN | USB_TYPE_STANDARD))
1274 break;
1275 ch9getstatus(udc, setup->bRequestType, wValue, wIndex, wLength);
1276 return;
1277
1278 case USB_REQ_SET_ADDRESS:
1279 /* Status phase from udc */
1280 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD
1281 | USB_RECIP_DEVICE))
1282 break;
1283 ch9setaddress(udc, wValue, wIndex, wLength);
1284 return;
1285
1286 case USB_REQ_CLEAR_FEATURE:
1287 case USB_REQ_SET_FEATURE:
1288 /* Status phase from udc */
1289 {
1290 int rc = -EOPNOTSUPP;
1291
1292 if ((setup->bRequestType & (USB_RECIP_MASK | USB_TYPE_MASK))
1293 == (USB_RECIP_ENDPOINT | USB_TYPE_STANDARD)) {
1294 int pipe = get_pipe_by_windex(wIndex);
1295 struct fsl_ep *ep;
1296
1297 if (wValue != 0 || wLength != 0 || pipe > udc->max_ep)
1298 break;
1299 ep = get_ep_by_pipe(udc, pipe);
1300
1301 spin_unlock(&udc->lock);
1302 rc = fsl_ep_set_halt(&ep->ep,
1303 (setup->bRequest == USB_REQ_SET_FEATURE)
1304 ? 1 : 0);
1305 spin_lock(&udc->lock);
1306
1307 } else if ((setup->bRequestType & (USB_RECIP_MASK
1308 | USB_TYPE_MASK)) == (USB_RECIP_DEVICE
1309 | USB_TYPE_STANDARD)) {
1310 /* Note: The driver has not include OTG support yet.
1311 * This will be set when OTG support is added */
1312 if (!gadget_is_otg(&udc->gadget))
1313 break;
1314 else if (setup->bRequest == USB_DEVICE_B_HNP_ENABLE)
1315 udc->gadget.b_hnp_enable = 1;
1316 else if (setup->bRequest == USB_DEVICE_A_HNP_SUPPORT)
1317 udc->gadget.a_hnp_support = 1;
1318 else if (setup->bRequest ==
1319 USB_DEVICE_A_ALT_HNP_SUPPORT)
1320 udc->gadget.a_alt_hnp_support = 1;
1321 else
1322 break;
1323 rc = 0;
1324 } else
1325 break;
1326
1327 if (rc == 0) {
1328 if (ep0_prime_status(udc, EP_DIR_IN))
1329 ep0stall(udc);
1330 }
1331 return;
1332 }
1333
1334 default:
1335 break;
1336 }
1337
1338 /* Requests handled by gadget */
1339 if (wLength) {
1340 /* Data phase from gadget, status phase from udc */
1341 udc->ep0_dir = (setup->bRequestType & USB_DIR_IN)
1342 ? USB_DIR_IN : USB_DIR_OUT;
1343 spin_unlock(&udc->lock);
1344 if (udc->driver->setup(&udc->gadget,
1345 &udc->local_setup_buff) < 0)
1346 ep0stall(udc);
1347 spin_lock(&udc->lock);
1348 udc->ep0_state = (setup->bRequestType & USB_DIR_IN)
1349 ? DATA_STATE_XMIT : DATA_STATE_RECV;
1350 } else {
1351 /* No data phase, IN status from gadget */
1352 udc->ep0_dir = USB_DIR_IN;
1353 spin_unlock(&udc->lock);
1354 if (udc->driver->setup(&udc->gadget,
1355 &udc->local_setup_buff) < 0)
1356 ep0stall(udc);
1357 spin_lock(&udc->lock);
1358 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1359 }
1360 }
1361
1362 /* Process request for Data or Status phase of ep0
1363 * prime status phase if needed */
1364 static void ep0_req_complete(struct fsl_udc *udc, struct fsl_ep *ep0,
1365 struct fsl_req *req)
1366 {
1367 if (udc->usb_state == USB_STATE_ADDRESS) {
1368 /* Set the new address */
1369 u32 new_address = (u32) udc->device_address;
1370 fsl_writel(new_address << USB_DEVICE_ADDRESS_BIT_POS,
1371 &dr_regs->deviceaddr);
1372 }
1373
1374 done(ep0, req, 0);
1375
1376 switch (udc->ep0_state) {
1377 case DATA_STATE_XMIT:
1378 /* receive status phase */
1379 if (ep0_prime_status(udc, EP_DIR_OUT))
1380 ep0stall(udc);
1381 break;
1382 case DATA_STATE_RECV:
1383 /* send status phase */
1384 if (ep0_prime_status(udc, EP_DIR_IN))
1385 ep0stall(udc);
1386 break;
1387 case WAIT_FOR_OUT_STATUS:
1388 udc->ep0_state = WAIT_FOR_SETUP;
1389 break;
1390 case WAIT_FOR_SETUP:
1391 ERR("Unexpect ep0 packets\n");
1392 break;
1393 default:
1394 ep0stall(udc);
1395 break;
1396 }
1397 }
1398
1399 /* Tripwire mechanism to ensure a setup packet payload is extracted without
1400 * being corrupted by another incoming setup packet */
1401 static void tripwire_handler(struct fsl_udc *udc, u8 ep_num, u8 *buffer_ptr)
1402 {
1403 u32 temp;
1404 struct ep_queue_head *qh;
1405
1406 qh = &udc->ep_qh[ep_num * 2 + EP_DIR_OUT];
1407
1408 /* Clear bit in ENDPTSETUPSTAT */
1409 temp = fsl_readl(&dr_regs->endptsetupstat);
1410 fsl_writel(temp | (1 << ep_num), &dr_regs->endptsetupstat);
1411
1412 /* while a hazard exists when setup package arrives */
1413 do {
1414 /* Set Setup Tripwire */
1415 temp = fsl_readl(&dr_regs->usbcmd);
1416 fsl_writel(temp | USB_CMD_SUTW, &dr_regs->usbcmd);
1417
1418 /* Copy the setup packet to local buffer */
1419 memcpy(buffer_ptr, (u8 *) qh->setup_buffer, 8);
1420 } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_SUTW));
1421
1422 /* Clear Setup Tripwire */
1423 temp = fsl_readl(&dr_regs->usbcmd);
1424 fsl_writel(temp & ~USB_CMD_SUTW, &dr_regs->usbcmd);
1425 }
1426
1427 /* process-ep_req(): free the completed Tds for this req */
1428 static int process_ep_req(struct fsl_udc *udc, int pipe,
1429 struct fsl_req *curr_req)
1430 {
1431 struct ep_td_struct *curr_td;
1432 int td_complete, actual, remaining_length, j, tmp;
1433 int status = 0;
1434 int errors = 0;
1435 struct ep_queue_head *curr_qh = &udc->ep_qh[pipe];
1436 int direction = pipe % 2;
1437
1438 curr_td = curr_req->head;
1439 td_complete = 0;
1440 actual = curr_req->req.length;
1441
1442 for (j = 0; j < curr_req->dtd_count; j++) {
1443 remaining_length = (le32_to_cpu(curr_td->size_ioc_sts)
1444 & DTD_PACKET_SIZE)
1445 >> DTD_LENGTH_BIT_POS;
1446 actual -= remaining_length;
1447
1448 if ((errors = le32_to_cpu(curr_td->size_ioc_sts) &
1449 DTD_ERROR_MASK)) {
1450 if (errors & DTD_STATUS_HALTED) {
1451 ERR("dTD error %08x QH=%d\n", errors, pipe);
1452 /* Clear the errors and Halt condition */
1453 tmp = le32_to_cpu(curr_qh->size_ioc_int_sts);
1454 tmp &= ~errors;
1455 curr_qh->size_ioc_int_sts = cpu_to_le32(tmp);
1456 status = -EPIPE;
1457 /* FIXME: continue with next queued TD? */
1458
1459 break;
1460 }
1461 if (errors & DTD_STATUS_DATA_BUFF_ERR) {
1462 VDBG("Transfer overflow");
1463 status = -EPROTO;
1464 break;
1465 } else if (errors & DTD_STATUS_TRANSACTION_ERR) {
1466 VDBG("ISO error");
1467 status = -EILSEQ;
1468 break;
1469 } else
1470 ERR("Unknown error has occured (0x%x)!\n",
1471 errors);
1472
1473 } else if (le32_to_cpu(curr_td->size_ioc_sts)
1474 & DTD_STATUS_ACTIVE) {
1475 VDBG("Request not complete");
1476 status = REQ_UNCOMPLETE;
1477 return status;
1478 } else if (remaining_length) {
1479 if (direction) {
1480 VDBG("Transmit dTD remaining length not zero");
1481 status = -EPROTO;
1482 break;
1483 } else {
1484 td_complete++;
1485 break;
1486 }
1487 } else {
1488 td_complete++;
1489 VDBG("dTD transmitted successful");
1490 }
1491
1492 if (j != curr_req->dtd_count - 1)
1493 curr_td = (struct ep_td_struct *)curr_td->next_td_virt;
1494 }
1495
1496 if (status)
1497 return status;
1498
1499 curr_req->req.actual = actual;
1500
1501 return 0;
1502 }
1503
1504 /* Process a DTD completion interrupt */
1505 static void dtd_complete_irq(struct fsl_udc *udc)
1506 {
1507 u32 bit_pos;
1508 int i, ep_num, direction, bit_mask, status;
1509 struct fsl_ep *curr_ep;
1510 struct fsl_req *curr_req, *temp_req;
1511
1512 /* Clear the bits in the register */
1513 bit_pos = fsl_readl(&dr_regs->endptcomplete);
1514 fsl_writel(bit_pos, &dr_regs->endptcomplete);
1515
1516 if (!bit_pos)
1517 return;
1518
1519 for (i = 0; i < udc->max_ep * 2; i++) {
1520 ep_num = i >> 1;
1521 direction = i % 2;
1522
1523 bit_mask = 1 << (ep_num + 16 * direction);
1524
1525 if (!(bit_pos & bit_mask))
1526 continue;
1527
1528 curr_ep = get_ep_by_pipe(udc, i);
1529
1530 /* If the ep is configured */
1531 if (curr_ep->name == NULL) {
1532 WARNING("Invalid EP?");
1533 continue;
1534 }
1535
1536 /* process the req queue until an uncomplete request */
1537 list_for_each_entry_safe(curr_req, temp_req, &curr_ep->queue,
1538 queue) {
1539 status = process_ep_req(udc, i, curr_req);
1540
1541 VDBG("status of process_ep_req= %d, ep = %d",
1542 status, ep_num);
1543 if (status == REQ_UNCOMPLETE)
1544 break;
1545 /* write back status to req */
1546 curr_req->req.status = status;
1547
1548 if (ep_num == 0) {
1549 ep0_req_complete(udc, curr_ep, curr_req);
1550 break;
1551 } else
1552 done(curr_ep, curr_req, status);
1553 }
1554 }
1555 }
1556
1557 /* Process a port change interrupt */
1558 static void port_change_irq(struct fsl_udc *udc)
1559 {
1560 u32 speed;
1561
1562 /* Bus resetting is finished */
1563 if (!(fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET)) {
1564 /* Get the speed */
1565 speed = (fsl_readl(&dr_regs->portsc1)
1566 & PORTSCX_PORT_SPEED_MASK);
1567 switch (speed) {
1568 case PORTSCX_PORT_SPEED_HIGH:
1569 udc->gadget.speed = USB_SPEED_HIGH;
1570 break;
1571 case PORTSCX_PORT_SPEED_FULL:
1572 udc->gadget.speed = USB_SPEED_FULL;
1573 break;
1574 case PORTSCX_PORT_SPEED_LOW:
1575 udc->gadget.speed = USB_SPEED_LOW;
1576 break;
1577 default:
1578 udc->gadget.speed = USB_SPEED_UNKNOWN;
1579 break;
1580 }
1581 }
1582
1583 /* Update USB state */
1584 if (!udc->resume_state)
1585 udc->usb_state = USB_STATE_DEFAULT;
1586 }
1587
1588 /* Process suspend interrupt */
1589 static void suspend_irq(struct fsl_udc *udc)
1590 {
1591 udc->resume_state = udc->usb_state;
1592 udc->usb_state = USB_STATE_SUSPENDED;
1593
1594 /* report suspend to the driver, serial.c does not support this */
1595 if (udc->driver->suspend)
1596 udc->driver->suspend(&udc->gadget);
1597 }
1598
1599 static void bus_resume(struct fsl_udc *udc)
1600 {
1601 udc->usb_state = udc->resume_state;
1602 udc->resume_state = 0;
1603
1604 /* report resume to the driver, serial.c does not support this */
1605 if (udc->driver->resume)
1606 udc->driver->resume(&udc->gadget);
1607 }
1608
1609 /* Clear up all ep queues */
1610 static int reset_queues(struct fsl_udc *udc)
1611 {
1612 u8 pipe;
1613
1614 for (pipe = 0; pipe < udc->max_pipes; pipe++)
1615 udc_reset_ep_queue(udc, pipe);
1616
1617 /* report disconnect; the driver is already quiesced */
1618 spin_unlock(&udc->lock);
1619 udc->driver->disconnect(&udc->gadget);
1620 spin_lock(&udc->lock);
1621
1622 return 0;
1623 }
1624
1625 /* Process reset interrupt */
1626 static void reset_irq(struct fsl_udc *udc)
1627 {
1628 u32 temp;
1629 unsigned long timeout;
1630
1631 /* Clear the device address */
1632 temp = fsl_readl(&dr_regs->deviceaddr);
1633 fsl_writel(temp & ~USB_DEVICE_ADDRESS_MASK, &dr_regs->deviceaddr);
1634
1635 udc->device_address = 0;
1636
1637 /* Clear usb state */
1638 udc->resume_state = 0;
1639 udc->ep0_dir = 0;
1640 udc->ep0_state = WAIT_FOR_SETUP;
1641 udc->remote_wakeup = 0; /* default to 0 on reset */
1642 udc->gadget.b_hnp_enable = 0;
1643 udc->gadget.a_hnp_support = 0;
1644 udc->gadget.a_alt_hnp_support = 0;
1645
1646 /* Clear all the setup token semaphores */
1647 temp = fsl_readl(&dr_regs->endptsetupstat);
1648 fsl_writel(temp, &dr_regs->endptsetupstat);
1649
1650 /* Clear all the endpoint complete status bits */
1651 temp = fsl_readl(&dr_regs->endptcomplete);
1652 fsl_writel(temp, &dr_regs->endptcomplete);
1653
1654 timeout = jiffies + 100;
1655 while (fsl_readl(&dr_regs->endpointprime)) {
1656 /* Wait until all endptprime bits cleared */
1657 if (time_after(jiffies, timeout)) {
1658 ERR("Timeout for reset\n");
1659 break;
1660 }
1661 cpu_relax();
1662 }
1663
1664 /* Write 1s to the flush register */
1665 fsl_writel(0xffffffff, &dr_regs->endptflush);
1666
1667 if (fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET) {
1668 VDBG("Bus reset");
1669 /* Reset all the queues, include XD, dTD, EP queue
1670 * head and TR Queue */
1671 reset_queues(udc);
1672 udc->usb_state = USB_STATE_DEFAULT;
1673 } else {
1674 VDBG("Controller reset");
1675 /* initialize usb hw reg except for regs for EP, not
1676 * touch usbintr reg */
1677 dr_controller_setup(udc);
1678
1679 /* Reset all internal used Queues */
1680 reset_queues(udc);
1681
1682 ep0_setup(udc);
1683
1684 /* Enable DR IRQ reg, Set Run bit, change udc state */
1685 dr_controller_run(udc);
1686 udc->usb_state = USB_STATE_ATTACHED;
1687 }
1688 }
1689
1690 /*
1691 * USB device controller interrupt handler
1692 */
1693 static irqreturn_t fsl_udc_irq(int irq, void *_udc)
1694 {
1695 struct fsl_udc *udc = _udc;
1696 u32 irq_src;
1697 irqreturn_t status = IRQ_NONE;
1698 unsigned long flags;
1699
1700 /* Disable ISR for OTG host mode */
1701 if (udc->stopped)
1702 return IRQ_NONE;
1703 spin_lock_irqsave(&udc->lock, flags);
1704 irq_src = fsl_readl(&dr_regs->usbsts) & fsl_readl(&dr_regs->usbintr);
1705 /* Clear notification bits */
1706 fsl_writel(irq_src, &dr_regs->usbsts);
1707
1708 /* VDBG("irq_src [0x%8x]", irq_src); */
1709
1710 /* Need to resume? */
1711 if (udc->usb_state == USB_STATE_SUSPENDED)
1712 if ((fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_SUSPEND) == 0)
1713 bus_resume(udc);
1714
1715 /* USB Interrupt */
1716 if (irq_src & USB_STS_INT) {
1717 VDBG("Packet int");
1718 /* Setup package, we only support ep0 as control ep */
1719 if (fsl_readl(&dr_regs->endptsetupstat) & EP_SETUP_STATUS_EP0) {
1720 tripwire_handler(udc, 0,
1721 (u8 *) (&udc->local_setup_buff));
1722 setup_received_irq(udc, &udc->local_setup_buff);
1723 status = IRQ_HANDLED;
1724 }
1725
1726 /* completion of dtd */
1727 if (fsl_readl(&dr_regs->endptcomplete)) {
1728 dtd_complete_irq(udc);
1729 status = IRQ_HANDLED;
1730 }
1731 }
1732
1733 /* SOF (for ISO transfer) */
1734 if (irq_src & USB_STS_SOF) {
1735 status = IRQ_HANDLED;
1736 }
1737
1738 /* Port Change */
1739 if (irq_src & USB_STS_PORT_CHANGE) {
1740 port_change_irq(udc);
1741 status = IRQ_HANDLED;
1742 }
1743
1744 /* Reset Received */
1745 if (irq_src & USB_STS_RESET) {
1746 reset_irq(udc);
1747 status = IRQ_HANDLED;
1748 }
1749
1750 /* Sleep Enable (Suspend) */
1751 if (irq_src & USB_STS_SUSPEND) {
1752 suspend_irq(udc);
1753 status = IRQ_HANDLED;
1754 }
1755
1756 if (irq_src & (USB_STS_ERR | USB_STS_SYS_ERR)) {
1757 VDBG("Error IRQ %x", irq_src);
1758 }
1759
1760 spin_unlock_irqrestore(&udc->lock, flags);
1761 return status;
1762 }
1763
1764 /*----------------------------------------------------------------*
1765 * Hook to gadget drivers
1766 * Called by initialization code of gadget drivers
1767 *----------------------------------------------------------------*/
1768 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
1769 {
1770 int retval = -ENODEV;
1771 unsigned long flags = 0;
1772
1773 if (!udc_controller)
1774 return -ENODEV;
1775
1776 if (!driver || (driver->speed != USB_SPEED_FULL
1777 && driver->speed != USB_SPEED_HIGH)
1778 || !driver->bind || !driver->disconnect
1779 || !driver->setup)
1780 return -EINVAL;
1781
1782 if (udc_controller->driver)
1783 return -EBUSY;
1784
1785 /* lock is needed but whether should use this lock or another */
1786 spin_lock_irqsave(&udc_controller->lock, flags);
1787
1788 driver->driver.bus = NULL;
1789 /* hook up the driver */
1790 udc_controller->driver = driver;
1791 udc_controller->gadget.dev.driver = &driver->driver;
1792 spin_unlock_irqrestore(&udc_controller->lock, flags);
1793
1794 /* bind udc driver to gadget driver */
1795 retval = driver->bind(&udc_controller->gadget);
1796 if (retval) {
1797 VDBG("bind to %s --> %d", driver->driver.name, retval);
1798 udc_controller->gadget.dev.driver = NULL;
1799 udc_controller->driver = NULL;
1800 goto out;
1801 }
1802
1803 /* Enable DR IRQ reg and Set usbcmd reg Run bit */
1804 dr_controller_run(udc_controller);
1805 udc_controller->usb_state = USB_STATE_ATTACHED;
1806 udc_controller->ep0_state = WAIT_FOR_SETUP;
1807 udc_controller->ep0_dir = 0;
1808 printk(KERN_INFO "%s: bind to driver %s\n",
1809 udc_controller->gadget.name, driver->driver.name);
1810
1811 out:
1812 if (retval)
1813 printk(KERN_WARNING "gadget driver register failed %d\n",
1814 retval);
1815 return retval;
1816 }
1817 EXPORT_SYMBOL(usb_gadget_register_driver);
1818
1819 /* Disconnect from gadget driver */
1820 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1821 {
1822 struct fsl_ep *loop_ep;
1823 unsigned long flags;
1824
1825 if (!udc_controller)
1826 return -ENODEV;
1827
1828 if (!driver || driver != udc_controller->driver || !driver->unbind)
1829 return -EINVAL;
1830
1831 if (udc_controller->transceiver)
1832 otg_set_peripheral(udc_controller->transceiver, NULL);
1833
1834 /* stop DR, disable intr */
1835 dr_controller_stop(udc_controller);
1836
1837 /* in fact, no needed */
1838 udc_controller->usb_state = USB_STATE_ATTACHED;
1839 udc_controller->ep0_state = WAIT_FOR_SETUP;
1840 udc_controller->ep0_dir = 0;
1841
1842 /* stand operation */
1843 spin_lock_irqsave(&udc_controller->lock, flags);
1844 udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
1845 nuke(&udc_controller->eps[0], -ESHUTDOWN);
1846 list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
1847 ep.ep_list)
1848 nuke(loop_ep, -ESHUTDOWN);
1849 spin_unlock_irqrestore(&udc_controller->lock, flags);
1850
1851 /* report disconnect; the controller is already quiesced */
1852 driver->disconnect(&udc_controller->gadget);
1853
1854 /* unbind gadget and unhook driver. */
1855 driver->unbind(&udc_controller->gadget);
1856 udc_controller->gadget.dev.driver = NULL;
1857 udc_controller->driver = NULL;
1858
1859 printk(KERN_WARNING "unregistered gadget driver '%s'\n",
1860 driver->driver.name);
1861 return 0;
1862 }
1863 EXPORT_SYMBOL(usb_gadget_unregister_driver);
1864
1865 /*-------------------------------------------------------------------------
1866 PROC File System Support
1867 -------------------------------------------------------------------------*/
1868 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1869
1870 #include <linux/seq_file.h>
1871
1872 static const char proc_filename[] = "driver/fsl_usb2_udc";
1873
1874 static int fsl_proc_read(char *page, char **start, off_t off, int count,
1875 int *eof, void *_dev)
1876 {
1877 char *buf = page;
1878 char *next = buf;
1879 unsigned size = count;
1880 unsigned long flags;
1881 int t, i;
1882 u32 tmp_reg;
1883 struct fsl_ep *ep = NULL;
1884 struct fsl_req *req;
1885
1886 struct fsl_udc *udc = udc_controller;
1887 if (off != 0)
1888 return 0;
1889
1890 spin_lock_irqsave(&udc->lock, flags);
1891
1892 /* ------basic driver information ---- */
1893 t = scnprintf(next, size,
1894 DRIVER_DESC "\n"
1895 "%s version: %s\n"
1896 "Gadget driver: %s\n\n",
1897 driver_name, DRIVER_VERSION,
1898 udc->driver ? udc->driver->driver.name : "(none)");
1899 size -= t;
1900 next += t;
1901
1902 /* ------ DR Registers ----- */
1903 tmp_reg = fsl_readl(&dr_regs->usbcmd);
1904 t = scnprintf(next, size,
1905 "USBCMD reg:\n"
1906 "SetupTW: %d\n"
1907 "Run/Stop: %s\n\n",
1908 (tmp_reg & USB_CMD_SUTW) ? 1 : 0,
1909 (tmp_reg & USB_CMD_RUN_STOP) ? "Run" : "Stop");
1910 size -= t;
1911 next += t;
1912
1913 tmp_reg = fsl_readl(&dr_regs->usbsts);
1914 t = scnprintf(next, size,
1915 "USB Status Reg:\n"
1916 "Dr Suspend: %d Reset Received: %d System Error: %s "
1917 "USB Error Interrupt: %s\n\n",
1918 (tmp_reg & USB_STS_SUSPEND) ? 1 : 0,
1919 (tmp_reg & USB_STS_RESET) ? 1 : 0,
1920 (tmp_reg & USB_STS_SYS_ERR) ? "Err" : "Normal",
1921 (tmp_reg & USB_STS_ERR) ? "Err detected" : "No err");
1922 size -= t;
1923 next += t;
1924
1925 tmp_reg = fsl_readl(&dr_regs->usbintr);
1926 t = scnprintf(next, size,
1927 "USB Intrrupt Enable Reg:\n"
1928 "Sleep Enable: %d SOF Received Enable: %d "
1929 "Reset Enable: %d\n"
1930 "System Error Enable: %d "
1931 "Port Change Dectected Enable: %d\n"
1932 "USB Error Intr Enable: %d USB Intr Enable: %d\n\n",
1933 (tmp_reg & USB_INTR_DEVICE_SUSPEND) ? 1 : 0,
1934 (tmp_reg & USB_INTR_SOF_EN) ? 1 : 0,
1935 (tmp_reg & USB_INTR_RESET_EN) ? 1 : 0,
1936 (tmp_reg & USB_INTR_SYS_ERR_EN) ? 1 : 0,
1937 (tmp_reg & USB_INTR_PTC_DETECT_EN) ? 1 : 0,
1938 (tmp_reg & USB_INTR_ERR_INT_EN) ? 1 : 0,
1939 (tmp_reg & USB_INTR_INT_EN) ? 1 : 0);
1940 size -= t;
1941 next += t;
1942
1943 tmp_reg = fsl_readl(&dr_regs->frindex);
1944 t = scnprintf(next, size,
1945 "USB Frame Index Reg: Frame Number is 0x%x\n\n",
1946 (tmp_reg & USB_FRINDEX_MASKS));
1947 size -= t;
1948 next += t;
1949
1950 tmp_reg = fsl_readl(&dr_regs->deviceaddr);
1951 t = scnprintf(next, size,
1952 "USB Device Address Reg: Device Addr is 0x%x\n\n",
1953 (tmp_reg & USB_DEVICE_ADDRESS_MASK));
1954 size -= t;
1955 next += t;
1956
1957 tmp_reg = fsl_readl(&dr_regs->endpointlistaddr);
1958 t = scnprintf(next, size,
1959 "USB Endpoint List Address Reg: "
1960 "Device Addr is 0x%x\n\n",
1961 (tmp_reg & USB_EP_LIST_ADDRESS_MASK));
1962 size -= t;
1963 next += t;
1964
1965 tmp_reg = fsl_readl(&dr_regs->portsc1);
1966 t = scnprintf(next, size,
1967 "USB Port Status&Control Reg:\n"
1968 "Port Transceiver Type : %s Port Speed: %s\n"
1969 "PHY Low Power Suspend: %s Port Reset: %s "
1970 "Port Suspend Mode: %s\n"
1971 "Over-current Change: %s "
1972 "Port Enable/Disable Change: %s\n"
1973 "Port Enabled/Disabled: %s "
1974 "Current Connect Status: %s\n\n", ( {
1975 char *s;
1976 switch (tmp_reg & PORTSCX_PTS_FSLS) {
1977 case PORTSCX_PTS_UTMI:
1978 s = "UTMI"; break;
1979 case PORTSCX_PTS_ULPI:
1980 s = "ULPI "; break;
1981 case PORTSCX_PTS_FSLS:
1982 s = "FS/LS Serial"; break;
1983 default:
1984 s = "None"; break;
1985 }
1986 s;} ), ( {
1987 char *s;
1988 switch (tmp_reg & PORTSCX_PORT_SPEED_UNDEF) {
1989 case PORTSCX_PORT_SPEED_FULL:
1990 s = "Full Speed"; break;
1991 case PORTSCX_PORT_SPEED_LOW:
1992 s = "Low Speed"; break;
1993 case PORTSCX_PORT_SPEED_HIGH:
1994 s = "High Speed"; break;
1995 default:
1996 s = "Undefined"; break;
1997 }
1998 s;
1999 } ),
2000 (tmp_reg & PORTSCX_PHY_LOW_POWER_SPD) ?
2001 "Normal PHY mode" : "Low power mode",
2002 (tmp_reg & PORTSCX_PORT_RESET) ? "In Reset" :
2003 "Not in Reset",
2004 (tmp_reg & PORTSCX_PORT_SUSPEND) ? "In " : "Not in",
2005 (tmp_reg & PORTSCX_OVER_CURRENT_CHG) ? "Dected" :
2006 "No",
2007 (tmp_reg & PORTSCX_PORT_EN_DIS_CHANGE) ? "Disable" :
2008 "Not change",
2009 (tmp_reg & PORTSCX_PORT_ENABLE) ? "Enable" :
2010 "Not correct",
2011 (tmp_reg & PORTSCX_CURRENT_CONNECT_STATUS) ?
2012 "Attached" : "Not-Att");
2013 size -= t;
2014 next += t;
2015
2016 tmp_reg = fsl_readl(&dr_regs->usbmode);
2017 t = scnprintf(next, size,
2018 "USB Mode Reg: Controller Mode is: %s\n\n", ( {
2019 char *s;
2020 switch (tmp_reg & USB_MODE_CTRL_MODE_HOST) {
2021 case USB_MODE_CTRL_MODE_IDLE:
2022 s = "Idle"; break;
2023 case USB_MODE_CTRL_MODE_DEVICE:
2024 s = "Device Controller"; break;
2025 case USB_MODE_CTRL_MODE_HOST:
2026 s = "Host Controller"; break;
2027 default:
2028 s = "None"; break;
2029 }
2030 s;
2031 } ));
2032 size -= t;
2033 next += t;
2034
2035 tmp_reg = fsl_readl(&dr_regs->endptsetupstat);
2036 t = scnprintf(next, size,
2037 "Endpoint Setup Status Reg: SETUP on ep 0x%x\n\n",
2038 (tmp_reg & EP_SETUP_STATUS_MASK));
2039 size -= t;
2040 next += t;
2041
2042 for (i = 0; i < udc->max_ep / 2; i++) {
2043 tmp_reg = fsl_readl(&dr_regs->endptctrl[i]);
2044 t = scnprintf(next, size, "EP Ctrl Reg [0x%x]: = [0x%x]\n",
2045 i, tmp_reg);
2046 size -= t;
2047 next += t;
2048 }
2049 tmp_reg = fsl_readl(&dr_regs->endpointprime);
2050 t = scnprintf(next, size, "EP Prime Reg = [0x%x]\n\n", tmp_reg);
2051 size -= t;
2052 next += t;
2053
2054 #ifndef CONFIG_ARCH_MXC
2055 tmp_reg = usb_sys_regs->snoop1;
2056 t = scnprintf(next, size, "Snoop1 Reg : = [0x%x]\n\n", tmp_reg);
2057 size -= t;
2058 next += t;
2059
2060 tmp_reg = usb_sys_regs->control;
2061 t = scnprintf(next, size, "General Control Reg : = [0x%x]\n\n",
2062 tmp_reg);
2063 size -= t;
2064 next += t;
2065 #endif
2066
2067 /* ------fsl_udc, fsl_ep, fsl_request structure information ----- */
2068 ep = &udc->eps[0];
2069 t = scnprintf(next, size, "For %s Maxpkt is 0x%x index is 0x%x\n",
2070 ep->ep.name, ep_maxpacket(ep), ep_index(ep));
2071 size -= t;
2072 next += t;
2073
2074 if (list_empty(&ep->queue)) {
2075 t = scnprintf(next, size, "its req queue is empty\n\n");
2076 size -= t;
2077 next += t;
2078 } else {
2079 list_for_each_entry(req, &ep->queue, queue) {
2080 t = scnprintf(next, size,
2081 "req %p actual 0x%x length 0x%x buf %p\n",
2082 &req->req, req->req.actual,
2083 req->req.length, req->req.buf);
2084 size -= t;
2085 next += t;
2086 }
2087 }
2088 /* other gadget->eplist ep */
2089 list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
2090 if (ep->desc) {
2091 t = scnprintf(next, size,
2092 "\nFor %s Maxpkt is 0x%x "
2093 "index is 0x%x\n",
2094 ep->ep.name, ep_maxpacket(ep),
2095 ep_index(ep));
2096 size -= t;
2097 next += t;
2098
2099 if (list_empty(&ep->queue)) {
2100 t = scnprintf(next, size,
2101 "its req queue is empty\n\n");
2102 size -= t;
2103 next += t;
2104 } else {
2105 list_for_each_entry(req, &ep->queue, queue) {
2106 t = scnprintf(next, size,
2107 "req %p actual 0x%x length "
2108 "0x%x buf %p\n",
2109 &req->req, req->req.actual,
2110 req->req.length, req->req.buf);
2111 size -= t;
2112 next += t;
2113 } /* end for each_entry of ep req */
2114 } /* end for else */
2115 } /* end for if(ep->queue) */
2116 } /* end (ep->desc) */
2117
2118 spin_unlock_irqrestore(&udc->lock, flags);
2119
2120 *eof = 1;
2121 return count - size;
2122 }
2123
2124 #define create_proc_file() create_proc_read_entry(proc_filename, \
2125 0, NULL, fsl_proc_read, NULL)
2126
2127 #define remove_proc_file() remove_proc_entry(proc_filename, NULL)
2128
2129 #else /* !CONFIG_USB_GADGET_DEBUG_FILES */
2130
2131 #define create_proc_file() do {} while (0)
2132 #define remove_proc_file() do {} while (0)
2133
2134 #endif /* CONFIG_USB_GADGET_DEBUG_FILES */
2135
2136 /*-------------------------------------------------------------------------*/
2137
2138 /* Release udc structures */
2139 static void fsl_udc_release(struct device *dev)
2140 {
2141 complete(udc_controller->done);
2142 dma_free_coherent(dev, udc_controller->ep_qh_size,
2143 udc_controller->ep_qh, udc_controller->ep_qh_dma);
2144 kfree(udc_controller);
2145 }
2146
2147 /******************************************************************
2148 Internal structure setup functions
2149 *******************************************************************/
2150 /*------------------------------------------------------------------
2151 * init resource for globle controller
2152 * Return the udc handle on success or NULL on failure
2153 ------------------------------------------------------------------*/
2154 static int __init struct_udc_setup(struct fsl_udc *udc,
2155 struct platform_device *pdev)
2156 {
2157 struct fsl_usb2_platform_data *pdata;
2158 size_t size;
2159
2160 pdata = pdev->dev.platform_data;
2161 udc->phy_mode = pdata->phy_mode;
2162
2163 udc->eps = kzalloc(sizeof(struct fsl_ep) * udc->max_ep, GFP_KERNEL);
2164 if (!udc->eps) {
2165 ERR("malloc fsl_ep failed\n");
2166 return -1;
2167 }
2168
2169 /* initialized QHs, take care of alignment */
2170 size = udc->max_ep * sizeof(struct ep_queue_head);
2171 if (size < QH_ALIGNMENT)
2172 size = QH_ALIGNMENT;
2173 else if ((size % QH_ALIGNMENT) != 0) {
2174 size += QH_ALIGNMENT + 1;
2175 size &= ~(QH_ALIGNMENT - 1);
2176 }
2177 udc->ep_qh = dma_alloc_coherent(&pdev->dev, size,
2178 &udc->ep_qh_dma, GFP_KERNEL);
2179 if (!udc->ep_qh) {
2180 ERR("malloc QHs for udc failed\n");
2181 kfree(udc->eps);
2182 return -1;
2183 }
2184
2185 udc->ep_qh_size = size;
2186
2187 /* Initialize ep0 status request structure */
2188 /* FIXME: fsl_alloc_request() ignores ep argument */
2189 udc->status_req = container_of(fsl_alloc_request(NULL, GFP_KERNEL),
2190 struct fsl_req, req);
2191 /* allocate a small amount of memory to get valid address */
2192 udc->status_req->req.buf = kmalloc(8, GFP_KERNEL);
2193 udc->status_req->req.dma = virt_to_phys(udc->status_req->req.buf);
2194
2195 udc->resume_state = USB_STATE_NOTATTACHED;
2196 udc->usb_state = USB_STATE_POWERED;
2197 udc->ep0_dir = 0;
2198 udc->remote_wakeup = 0; /* default to 0 on reset */
2199
2200 return 0;
2201 }
2202
2203 /*----------------------------------------------------------------
2204 * Setup the fsl_ep struct for eps
2205 * Link fsl_ep->ep to gadget->ep_list
2206 * ep0out is not used so do nothing here
2207 * ep0in should be taken care
2208 *--------------------------------------------------------------*/
2209 static int __init struct_ep_setup(struct fsl_udc *udc, unsigned char index,
2210 char *name, int link)
2211 {
2212 struct fsl_ep *ep = &udc->eps[index];
2213
2214 ep->udc = udc;
2215 strcpy(ep->name, name);
2216 ep->ep.name = ep->name;
2217
2218 ep->ep.ops = &fsl_ep_ops;
2219 ep->stopped = 0;
2220
2221 /* for ep0: maxP defined in desc
2222 * for other eps, maxP is set by epautoconfig() called by gadget layer
2223 */
2224 ep->ep.maxpacket = (unsigned short) ~0;
2225
2226 /* the queue lists any req for this ep */
2227 INIT_LIST_HEAD(&ep->queue);
2228
2229 /* gagdet.ep_list used for ep_autoconfig so no ep0 */
2230 if (link)
2231 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2232 ep->gadget = &udc->gadget;
2233 ep->qh = &udc->ep_qh[index];
2234
2235 return 0;
2236 }
2237
2238 /* Driver probe function
2239 * all intialization operations implemented here except enabling usb_intr reg
2240 * board setup should have been done in the platform code
2241 */
2242 static int __init fsl_udc_probe(struct platform_device *pdev)
2243 {
2244 struct resource *res;
2245 int ret = -ENODEV;
2246 unsigned int i;
2247 u32 dccparams;
2248
2249 if (strcmp(pdev->name, driver_name)) {
2250 VDBG("Wrong device");
2251 return -ENODEV;
2252 }
2253
2254 udc_controller = kzalloc(sizeof(struct fsl_udc), GFP_KERNEL);
2255 if (udc_controller == NULL) {
2256 ERR("malloc udc failed\n");
2257 return -ENOMEM;
2258 }
2259
2260 spin_lock_init(&udc_controller->lock);
2261 udc_controller->stopped = 1;
2262
2263 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2264 if (!res) {
2265 ret = -ENXIO;
2266 goto err_kfree;
2267 }
2268
2269 if (!request_mem_region(res->start, res->end - res->start + 1,
2270 driver_name)) {
2271 ERR("request mem region for %s failed\n", pdev->name);
2272 ret = -EBUSY;
2273 goto err_kfree;
2274 }
2275
2276 dr_regs = ioremap(res->start, resource_size(res));
2277 if (!dr_regs) {
2278 ret = -ENOMEM;
2279 goto err_release_mem_region;
2280 }
2281
2282 #ifndef CONFIG_ARCH_MXC
2283 usb_sys_regs = (struct usb_sys_interface *)
2284 ((u32)dr_regs + USB_DR_SYS_OFFSET);
2285 #endif
2286
2287 /* Initialize USB clocks */
2288 ret = fsl_udc_clk_init(pdev);
2289 if (ret < 0)
2290 goto err_iounmap_noclk;
2291
2292 /* Read Device Controller Capability Parameters register */
2293 dccparams = fsl_readl(&dr_regs->dccparams);
2294 if (!(dccparams & DCCPARAMS_DC)) {
2295 ERR("This SOC doesn't support device role\n");
2296 ret = -ENODEV;
2297 goto err_iounmap;
2298 }
2299 /* Get max device endpoints */
2300 /* DEN is bidirectional ep number, max_ep doubles the number */
2301 udc_controller->max_ep = (dccparams & DCCPARAMS_DEN_MASK) * 2;
2302
2303 udc_controller->irq = platform_get_irq(pdev, 0);
2304 if (!udc_controller->irq) {
2305 ret = -ENODEV;
2306 goto err_iounmap;
2307 }
2308
2309 ret = request_irq(udc_controller->irq, fsl_udc_irq, IRQF_SHARED,
2310 driver_name, udc_controller);
2311 if (ret != 0) {
2312 ERR("cannot request irq %d err %d\n",
2313 udc_controller->irq, ret);
2314 goto err_iounmap;
2315 }
2316
2317 /* Initialize the udc structure including QH member and other member */
2318 if (struct_udc_setup(udc_controller, pdev)) {
2319 ERR("Can't initialize udc data structure\n");
2320 ret = -ENOMEM;
2321 goto err_free_irq;
2322 }
2323
2324 /* initialize usb hw reg except for regs for EP,
2325 * leave usbintr reg untouched */
2326 dr_controller_setup(udc_controller);
2327
2328 fsl_udc_clk_finalize(pdev);
2329
2330 /* Setup gadget structure */
2331 udc_controller->gadget.ops = &fsl_gadget_ops;
2332 udc_controller->gadget.is_dualspeed = 1;
2333 udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
2334 INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
2335 udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2336 udc_controller->gadget.name = driver_name;
2337
2338 /* Setup gadget.dev and register with kernel */
2339 dev_set_name(&udc_controller->gadget.dev, "gadget");
2340 udc_controller->gadget.dev.release = fsl_udc_release;
2341 udc_controller->gadget.dev.parent = &pdev->dev;
2342 ret = device_register(&udc_controller->gadget.dev);
2343 if (ret < 0)
2344 goto err_free_irq;
2345
2346 /* setup QH and epctrl for ep0 */
2347 ep0_setup(udc_controller);
2348
2349 /* setup udc->eps[] for ep0 */
2350 struct_ep_setup(udc_controller, 0, "ep0", 0);
2351 /* for ep0: the desc defined here;
2352 * for other eps, gadget layer called ep_enable with defined desc
2353 */
2354 udc_controller->eps[0].desc = &fsl_ep0_desc;
2355 udc_controller->eps[0].ep.maxpacket = USB_MAX_CTRL_PAYLOAD;
2356
2357 /* setup the udc->eps[] for non-control endpoints and link
2358 * to gadget.ep_list */
2359 for (i = 1; i < (int)(udc_controller->max_ep / 2); i++) {
2360 char name[14];
2361
2362 sprintf(name, "ep%dout", i);
2363 struct_ep_setup(udc_controller, i * 2, name, 1);
2364 sprintf(name, "ep%din", i);
2365 struct_ep_setup(udc_controller, i * 2 + 1, name, 1);
2366 }
2367
2368 /* use dma_pool for TD management */
2369 udc_controller->td_pool = dma_pool_create("udc_td", &pdev->dev,
2370 sizeof(struct ep_td_struct),
2371 DTD_ALIGNMENT, UDC_DMA_BOUNDARY);
2372 if (udc_controller->td_pool == NULL) {
2373 ret = -ENOMEM;
2374 goto err_unregister;
2375 }
2376 create_proc_file();
2377 return 0;
2378
2379 err_unregister:
2380 device_unregister(&udc_controller->gadget.dev);
2381 err_free_irq:
2382 free_irq(udc_controller->irq, udc_controller);
2383 err_iounmap:
2384 fsl_udc_clk_release();
2385 err_iounmap_noclk:
2386 iounmap(dr_regs);
2387 err_release_mem_region:
2388 release_mem_region(res->start, res->end - res->start + 1);
2389 err_kfree:
2390 kfree(udc_controller);
2391 udc_controller = NULL;
2392 return ret;
2393 }
2394
2395 /* Driver removal function
2396 * Free resources and finish pending transactions
2397 */
2398 static int __exit fsl_udc_remove(struct platform_device *pdev)
2399 {
2400 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2401
2402 DECLARE_COMPLETION(done);
2403
2404 if (!udc_controller)
2405 return -ENODEV;
2406 udc_controller->done = &done;
2407
2408 fsl_udc_clk_release();
2409
2410 /* DR has been stopped in usb_gadget_unregister_driver() */
2411 remove_proc_file();
2412
2413 /* Free allocated memory */
2414 kfree(udc_controller->status_req->req.buf);
2415 kfree(udc_controller->status_req);
2416 kfree(udc_controller->eps);
2417
2418 dma_pool_destroy(udc_controller->td_pool);
2419 free_irq(udc_controller->irq, udc_controller);
2420 iounmap(dr_regs);
2421 release_mem_region(res->start, res->end - res->start + 1);
2422
2423 device_unregister(&udc_controller->gadget.dev);
2424 /* free udc --wait for the release() finished */
2425 wait_for_completion(&done);
2426
2427 return 0;
2428 }
2429
2430 /*-----------------------------------------------------------------
2431 * Modify Power management attributes
2432 * Used by OTG statemachine to disable gadget temporarily
2433 -----------------------------------------------------------------*/
2434 static int fsl_udc_suspend(struct platform_device *pdev, pm_message_t state)
2435 {
2436 dr_controller_stop(udc_controller);
2437 return 0;
2438 }
2439
2440 /*-----------------------------------------------------------------
2441 * Invoked on USB resume. May be called in_interrupt.
2442 * Here we start the DR controller and enable the irq
2443 *-----------------------------------------------------------------*/
2444 static int fsl_udc_resume(struct platform_device *pdev)
2445 {
2446 /* Enable DR irq reg and set controller Run */
2447 if (udc_controller->stopped) {
2448 dr_controller_setup(udc_controller);
2449 dr_controller_run(udc_controller);
2450 }
2451 udc_controller->usb_state = USB_STATE_ATTACHED;
2452 udc_controller->ep0_state = WAIT_FOR_SETUP;
2453 udc_controller->ep0_dir = 0;
2454 return 0;
2455 }
2456
2457 /*-------------------------------------------------------------------------
2458 Register entry point for the peripheral controller driver
2459 --------------------------------------------------------------------------*/
2460
2461 static struct platform_driver udc_driver = {
2462 .remove = __exit_p(fsl_udc_remove),
2463 /* these suspend and resume are not usb suspend and resume */
2464 .suspend = fsl_udc_suspend,
2465 .resume = fsl_udc_resume,
2466 .driver = {
2467 .name = (char *)driver_name,
2468 .owner = THIS_MODULE,
2469 },
2470 };
2471
2472 static int __init udc_init(void)
2473 {
2474 printk(KERN_INFO "%s (%s)\n", driver_desc, DRIVER_VERSION);
2475 return platform_driver_probe(&udc_driver, fsl_udc_probe);
2476 }
2477
2478 module_init(udc_init);
2479
2480 static void __exit udc_exit(void)
2481 {
2482 platform_driver_unregister(&udc_driver);
2483 printk(KERN_WARNING "%s unregistered\n", driver_desc);
2484 }
2485
2486 module_exit(udc_exit);
2487
2488 MODULE_DESCRIPTION(DRIVER_DESC);
2489 MODULE_AUTHOR(DRIVER_AUTHOR);
2490 MODULE_LICENSE("GPL");
2491 MODULE_ALIAS("platform:fsl-usb2-udc");
Linux for Ginger Game Console