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1/*
2 * Copyright (C) 2004-2007,2011-2012 Freescale Semiconductor, Inc.
3 * All rights reserved.
4 *
5 * Author: Li Yang <leoli@freescale.com>
6 * Jiang Bo <tanya.jiang@freescale.com>
7 *
8 * Description:
9 * Freescale high-speed USB SOC DR module device controller driver.
10 * This can be found on MPC8349E/MPC8313E/MPC5121E cpus.
11 * The driver is previously named as mpc_udc. Based on bare board
12 * code from Dave Liu and Shlomi Gridish.
13 *
14 * This program is free software; you can redistribute it and/or modify it
15 * under the terms of the GNU General Public License as published by the
16 * Free Software Foundation; either version 2 of the License, or (at your
17 * option) any later version.
18 */
19
20#undef VERBOSE
21
22#include <linux/module.h>
23#include <linux/kernel.h>
24#include <linux/ioport.h>
25#include <linux/types.h>
26#include <linux/errno.h>
27#include <linux/slab.h>
28#include <linux/init.h>
29#include <linux/list.h>
30#include <linux/interrupt.h>
31#include <linux/proc_fs.h>
32#include <linux/mm.h>
33#include <linux/moduleparam.h>
34#include <linux/device.h>
35#include <linux/usb/ch9.h>
36#include <linux/usb/gadget.h>
37#include <linux/usb/otg.h>
38#include <linux/dma-mapping.h>
39#include <linux/platform_device.h>
40#include <linux/fsl_devices.h>
41#include <linux/dmapool.h>
42#include <linux/delay.h>
43
44#include <asm/byteorder.h>
45#include <asm/io.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
57static const char driver_name[] = "fsl-usb2-udc";
58static const char driver_desc[] = DRIVER_DESC;
59
60static struct usb_dr_device *dr_regs;
61
62static struct usb_sys_interface *usb_sys_regs;
63
64/* it is initialized in probe() */
65static struct fsl_udc *udc_controller = NULL;
66
67static const struct usb_endpoint_descriptor
68fsl_ep0_desc = {
69 .bLength = USB_DT_ENDPOINT_SIZE,
70 .bDescriptorType = USB_DT_ENDPOINT,
71 .bEndpointAddress = 0,
72 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
73 .wMaxPacketSize = USB_MAX_CTRL_PAYLOAD,
74};
75
76static void fsl_ep_fifo_flush(struct usb_ep *_ep);
77
78#ifdef CONFIG_PPC32
79/*
80 * On some SoCs, the USB controller registers can be big or little endian,
81 * depending on the version of the chip. In order to be able to run the
82 * same kernel binary on 2 different versions of an SoC, the BE/LE decision
83 * must be made at run time. _fsl_readl and fsl_writel are pointers to the
84 * BE or LE readl() and writel() functions, and fsl_readl() and fsl_writel()
85 * call through those pointers. Platform code for SoCs that have BE USB
86 * registers should set pdata->big_endian_mmio flag.
87 *
88 * This also applies to controller-to-cpu accessors for the USB descriptors,
89 * since their endianness is also SoC dependant. Platform code for SoCs that
90 * have BE USB descriptors should set pdata->big_endian_desc flag.
91 */
92static u32 _fsl_readl_be(const unsigned __iomem *p)
93{
94 return in_be32(p);
95}
96
97static u32 _fsl_readl_le(const unsigned __iomem *p)
98{
99 return in_le32(p);
100}
101
102static void _fsl_writel_be(u32 v, unsigned __iomem *p)
103{
104 out_be32(p, v);
105}
106
107static void _fsl_writel_le(u32 v, unsigned __iomem *p)
108{
109 out_le32(p, v);
110}
111
112static u32 (*_fsl_readl)(const unsigned __iomem *p);
113static void (*_fsl_writel)(u32 v, unsigned __iomem *p);
114
115#define fsl_readl(p) (*_fsl_readl)((p))
116#define fsl_writel(v, p) (*_fsl_writel)((v), (p))
117
118static inline void fsl_set_accessors(struct fsl_usb2_platform_data *pdata)
119{
120 if (pdata->big_endian_mmio) {
121 _fsl_readl = _fsl_readl_be;
122 _fsl_writel = _fsl_writel_be;
123 } else {
124 _fsl_readl = _fsl_readl_le;
125 _fsl_writel = _fsl_writel_le;
126 }
127}
128
129static inline u32 cpu_to_hc32(const u32 x)
130{
131 return udc_controller->pdata->big_endian_desc
132 ? (__force u32)cpu_to_be32(x)
133 : (__force u32)cpu_to_le32(x);
134}
135
136static inline u32 hc32_to_cpu(const u32 x)
137{
138 return udc_controller->pdata->big_endian_desc
139 ? be32_to_cpu((__force __be32)x)
140 : le32_to_cpu((__force __le32)x);
141}
142#else /* !CONFIG_PPC32 */
143static inline void fsl_set_accessors(struct fsl_usb2_platform_data *pdata) {}
144
145#define fsl_readl(addr) readl(addr)
146#define fsl_writel(val32, addr) writel(val32, addr)
147#define cpu_to_hc32(x) cpu_to_le32(x)
148#define hc32_to_cpu(x) le32_to_cpu(x)
149#endif /* CONFIG_PPC32 */
150
151/********************************************************************
152 * Internal Used Function
153********************************************************************/
154/*-----------------------------------------------------------------
155 * done() - retire a request; caller blocked irqs
156 * @status : request status to be set, only works when
157 * request is still in progress.
158 *--------------------------------------------------------------*/
159static void done(struct fsl_ep *ep, struct fsl_req *req, int status)
160{
161 struct fsl_udc *udc = NULL;
162 unsigned char stopped = ep->stopped;
163 struct ep_td_struct *curr_td, *next_td;
164 int j;
165
166 udc = (struct fsl_udc *)ep->udc;
167 /* Removed the req from fsl_ep->queue */
168 list_del_init(&req->queue);
169
170 /* req.status should be set as -EINPROGRESS in ep_queue() */
171 if (req->req.status == -EINPROGRESS)
172 req->req.status = status;
173 else
174 status = req->req.status;
175
176 /* Free dtd for the request */
177 next_td = req->head;
178 for (j = 0; j < req->dtd_count; j++) {
179 curr_td = next_td;
180 if (j != req->dtd_count - 1) {
181 next_td = curr_td->next_td_virt;
182 }
183 dma_pool_free(udc->td_pool, curr_td, curr_td->td_dma);
184 }
185
186 if (req->mapped) {
187 dma_unmap_single(ep->udc->gadget.dev.parent,
188 req->req.dma, req->req.length,
189 ep_is_in(ep)
190 ? DMA_TO_DEVICE
191 : DMA_FROM_DEVICE);
192 req->req.dma = DMA_ADDR_INVALID;
193 req->mapped = 0;
194 } else
195 dma_sync_single_for_cpu(ep->udc->gadget.dev.parent,
196 req->req.dma, req->req.length,
197 ep_is_in(ep)
198 ? DMA_TO_DEVICE
199 : DMA_FROM_DEVICE);
200
201 if (status && (status != -ESHUTDOWN))
202 VDBG("complete %s req %p stat %d len %u/%u",
203 ep->ep.name, &req->req, status,
204 req->req.actual, req->req.length);
205
206 ep->stopped = 1;
207
208 spin_unlock(&ep->udc->lock);
209 /* complete() is from gadget layer,
210 * eg fsg->bulk_in_complete() */
211 if (req->req.complete)
212 req->req.complete(&ep->ep, &req->req);
213
214 spin_lock(&ep->udc->lock);
215 ep->stopped = stopped;
216}
217
218/*-----------------------------------------------------------------
219 * nuke(): delete all requests related to this ep
220 * called with spinlock held
221 *--------------------------------------------------------------*/
222static void nuke(struct fsl_ep *ep, int status)
223{
224 ep->stopped = 1;
225
226 /* Flush fifo */
227 fsl_ep_fifo_flush(&ep->ep);
228
229 /* Whether this eq has request linked */
230 while (!list_empty(&ep->queue)) {
231 struct fsl_req *req = NULL;
232
233 req = list_entry(ep->queue.next, struct fsl_req, queue);
234 done(ep, req, status);
235 }
236}
237
238/*------------------------------------------------------------------
239 Internal Hardware related function
240 ------------------------------------------------------------------*/
241
242static int dr_controller_setup(struct fsl_udc *udc)
243{
244 unsigned int tmp, portctrl, ep_num;
245 unsigned int max_no_of_ep;
246 unsigned int ctrl;
247 unsigned long timeout;
248
249#define FSL_UDC_RESET_TIMEOUT 1000
250
251 /* Config PHY interface */
252 portctrl = fsl_readl(&dr_regs->portsc1);
253 portctrl &= ~(PORTSCX_PHY_TYPE_SEL | PORTSCX_PORT_WIDTH);
254 switch (udc->phy_mode) {
255 case FSL_USB2_PHY_ULPI:
256 if (udc->pdata->have_sysif_regs) {
257 if (udc->pdata->controller_ver) {
258 /* controller version 1.6 or above */
259 ctrl = __raw_readl(&usb_sys_regs->control);
260 ctrl &= ~USB_CTRL_UTMI_PHY_EN;
261 ctrl |= USB_CTRL_USB_EN;
262 __raw_writel(ctrl, &usb_sys_regs->control);
263 }
264 }
265 portctrl |= PORTSCX_PTS_ULPI;
266 break;
267 case FSL_USB2_PHY_UTMI_WIDE:
268 portctrl |= PORTSCX_PTW_16BIT;
269 /* fall through */
270 case FSL_USB2_PHY_UTMI:
271 if (udc->pdata->have_sysif_regs) {
272 if (udc->pdata->controller_ver) {
273 /* controller version 1.6 or above */
274 ctrl = __raw_readl(&usb_sys_regs->control);
275 ctrl |= (USB_CTRL_UTMI_PHY_EN |
276 USB_CTRL_USB_EN);
277 __raw_writel(ctrl, &usb_sys_regs->control);
278 mdelay(FSL_UTMI_PHY_DLY); /* Delay for UTMI
279 PHY CLK to become stable - 10ms*/
280 }
281 }
282 portctrl |= PORTSCX_PTS_UTMI;
283 break;
284 case FSL_USB2_PHY_SERIAL:
285 portctrl |= PORTSCX_PTS_FSLS;
286 break;
287 default:
288 return -EINVAL;
289 }
290 fsl_writel(portctrl, &dr_regs->portsc1);
291
292 /* Stop and reset the usb controller */
293 tmp = fsl_readl(&dr_regs->usbcmd);
294 tmp &= ~USB_CMD_RUN_STOP;
295 fsl_writel(tmp, &dr_regs->usbcmd);
296
297 tmp = fsl_readl(&dr_regs->usbcmd);
298 tmp |= USB_CMD_CTRL_RESET;
299 fsl_writel(tmp, &dr_regs->usbcmd);
300
301 /* Wait for reset to complete */
302 timeout = jiffies + FSL_UDC_RESET_TIMEOUT;
303 while (fsl_readl(&dr_regs->usbcmd) & USB_CMD_CTRL_RESET) {
304 if (time_after(jiffies, timeout)) {
305 ERR("udc reset timeout!\n");
306 return -ETIMEDOUT;
307 }
308 cpu_relax();
309 }
310
311 /* Set the controller as device mode */
312 tmp = fsl_readl(&dr_regs->usbmode);
313 tmp &= ~USB_MODE_CTRL_MODE_MASK; /* clear mode bits */
314 tmp |= USB_MODE_CTRL_MODE_DEVICE;
315 /* Disable Setup Lockout */
316 tmp |= USB_MODE_SETUP_LOCK_OFF;
317 if (udc->pdata->es)
318 tmp |= USB_MODE_ES;
319 fsl_writel(tmp, &dr_regs->usbmode);
320
321 /* Clear the setup status */
322 fsl_writel(0, &dr_regs->usbsts);
323
324 tmp = udc->ep_qh_dma;
325 tmp &= USB_EP_LIST_ADDRESS_MASK;
326 fsl_writel(tmp, &dr_regs->endpointlistaddr);
327
328 VDBG("vir[qh_base] is %p phy[qh_base] is 0x%8x reg is 0x%8x",
329 udc->ep_qh, (int)tmp,
330 fsl_readl(&dr_regs->endpointlistaddr));
331
332 max_no_of_ep = (0x0000001F & fsl_readl(&dr_regs->dccparams));
333 for (ep_num = 1; ep_num < max_no_of_ep; ep_num++) {
334 tmp = fsl_readl(&dr_regs->endptctrl[ep_num]);
335 tmp &= ~(EPCTRL_TX_TYPE | EPCTRL_RX_TYPE);
336 tmp |= (EPCTRL_EP_TYPE_BULK << EPCTRL_TX_EP_TYPE_SHIFT)
337 | (EPCTRL_EP_TYPE_BULK << EPCTRL_RX_EP_TYPE_SHIFT);
338 fsl_writel(tmp, &dr_regs->endptctrl[ep_num]);
339 }
340 /* Config control enable i/o output, cpu endian register */
341#ifndef CONFIG_ARCH_MXC
342 if (udc->pdata->have_sysif_regs) {
343 ctrl = __raw_readl(&usb_sys_regs->control);
344 ctrl |= USB_CTRL_IOENB;
345 __raw_writel(ctrl, &usb_sys_regs->control);
346 }
347#endif
348
349#if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE)
350 /* Turn on cache snooping hardware, since some PowerPC platforms
351 * wholly rely on hardware to deal with cache coherent. */
352
353 if (udc->pdata->have_sysif_regs) {
354 /* Setup Snooping for all the 4GB space */
355 tmp = SNOOP_SIZE_2GB; /* starts from 0x0, size 2G */
356 __raw_writel(tmp, &usb_sys_regs->snoop1);
357 tmp |= 0x80000000; /* starts from 0x8000000, size 2G */
358 __raw_writel(tmp, &usb_sys_regs->snoop2);
359 }
360#endif
361
362 return 0;
363}
364
365/* Enable DR irq and set controller to run state */
366static void dr_controller_run(struct fsl_udc *udc)
367{
368 u32 temp;
369
370 /* Enable DR irq reg */
371 temp = USB_INTR_INT_EN | USB_INTR_ERR_INT_EN
372 | USB_INTR_PTC_DETECT_EN | USB_INTR_RESET_EN
373 | USB_INTR_DEVICE_SUSPEND | USB_INTR_SYS_ERR_EN;
374
375 fsl_writel(temp, &dr_regs->usbintr);
376
377 /* Clear stopped bit */
378 udc->stopped = 0;
379
380 /* Set the controller as device mode */
381 temp = fsl_readl(&dr_regs->usbmode);
382 temp |= USB_MODE_CTRL_MODE_DEVICE;
383 fsl_writel(temp, &dr_regs->usbmode);
384
385 /* Set controller to Run */
386 temp = fsl_readl(&dr_regs->usbcmd);
387 temp |= USB_CMD_RUN_STOP;
388 fsl_writel(temp, &dr_regs->usbcmd);
389}
390
391static void dr_controller_stop(struct fsl_udc *udc)
392{
393 unsigned int tmp;
394
395 pr_debug("%s\n", __func__);
396
397 /* if we're in OTG mode, and the Host is currently using the port,
398 * stop now and don't rip the controller out from under the
399 * ehci driver
400 */
401 if (udc->gadget.is_otg) {
402 if (!(fsl_readl(&dr_regs->otgsc) & OTGSC_STS_USB_ID)) {
403 pr_debug("udc: Leaving early\n");
404 return;
405 }
406 }
407
408 /* disable all INTR */
409 fsl_writel(0, &dr_regs->usbintr);
410
411 /* Set stopped bit for isr */
412 udc->stopped = 1;
413
414 /* disable IO output */
415/* usb_sys_regs->control = 0; */
416
417 /* set controller to Stop */
418 tmp = fsl_readl(&dr_regs->usbcmd);
419 tmp &= ~USB_CMD_RUN_STOP;
420 fsl_writel(tmp, &dr_regs->usbcmd);
421}
422
423static void dr_ep_setup(unsigned char ep_num, unsigned char dir,
424 unsigned char ep_type)
425{
426 unsigned int tmp_epctrl = 0;
427
428 tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
429 if (dir) {
430 if (ep_num)
431 tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
432 tmp_epctrl |= EPCTRL_TX_ENABLE;
433 tmp_epctrl &= ~EPCTRL_TX_TYPE;
434 tmp_epctrl |= ((unsigned int)(ep_type)
435 << EPCTRL_TX_EP_TYPE_SHIFT);
436 } else {
437 if (ep_num)
438 tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
439 tmp_epctrl |= EPCTRL_RX_ENABLE;
440 tmp_epctrl &= ~EPCTRL_RX_TYPE;
441 tmp_epctrl |= ((unsigned int)(ep_type)
442 << EPCTRL_RX_EP_TYPE_SHIFT);
443 }
444
445 fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
446}
447
448static void
449dr_ep_change_stall(unsigned char ep_num, unsigned char dir, int value)
450{
451 u32 tmp_epctrl = 0;
452
453 tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
454
455 if (value) {
456 /* set the stall bit */
457 if (dir)
458 tmp_epctrl |= EPCTRL_TX_EP_STALL;
459 else
460 tmp_epctrl |= EPCTRL_RX_EP_STALL;
461 } else {
462 /* clear the stall bit and reset data toggle */
463 if (dir) {
464 tmp_epctrl &= ~EPCTRL_TX_EP_STALL;
465 tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
466 } else {
467 tmp_epctrl &= ~EPCTRL_RX_EP_STALL;
468 tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
469 }
470 }
471 fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
472}
473
474/* Get stall status of a specific ep
475 Return: 0: not stalled; 1:stalled */
476static int dr_ep_get_stall(unsigned char ep_num, unsigned char dir)
477{
478 u32 epctrl;
479
480 epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
481 if (dir)
482 return (epctrl & EPCTRL_TX_EP_STALL) ? 1 : 0;
483 else
484 return (epctrl & EPCTRL_RX_EP_STALL) ? 1 : 0;
485}
486
487/********************************************************************
488 Internal Structure Build up functions
489********************************************************************/
490
491/*------------------------------------------------------------------
492* struct_ep_qh_setup(): set the Endpoint Capabilites field of QH
493 * @zlt: Zero Length Termination Select (1: disable; 0: enable)
494 * @mult: Mult field
495 ------------------------------------------------------------------*/
496static void struct_ep_qh_setup(struct fsl_udc *udc, unsigned char ep_num,
497 unsigned char dir, unsigned char ep_type,
498 unsigned int max_pkt_len,
499 unsigned int zlt, unsigned char mult)
500{
501 struct ep_queue_head *p_QH = &udc->ep_qh[2 * ep_num + dir];
502 unsigned int tmp = 0;
503
504 /* set the Endpoint Capabilites in QH */
505 switch (ep_type) {
506 case USB_ENDPOINT_XFER_CONTROL:
507 /* Interrupt On Setup (IOS). for control ep */
508 tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
509 | EP_QUEUE_HEAD_IOS;
510 break;
511 case USB_ENDPOINT_XFER_ISOC:
512 tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
513 | (mult << EP_QUEUE_HEAD_MULT_POS);
514 break;
515 case USB_ENDPOINT_XFER_BULK:
516 case USB_ENDPOINT_XFER_INT:
517 tmp = max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS;
518 break;
519 default:
520 VDBG("error ep type is %d", ep_type);
521 return;
522 }
523 if (zlt)
524 tmp |= EP_QUEUE_HEAD_ZLT_SEL;
525
526 p_QH->max_pkt_length = cpu_to_hc32(tmp);
527 p_QH->next_dtd_ptr = 1;
528 p_QH->size_ioc_int_sts = 0;
529}
530
531/* Setup qh structure and ep register for ep0. */
532static void ep0_setup(struct fsl_udc *udc)
533{
534 /* the intialization of an ep includes: fields in QH, Regs,
535 * fsl_ep struct */
536 struct_ep_qh_setup(udc, 0, USB_RECV, USB_ENDPOINT_XFER_CONTROL,
537 USB_MAX_CTRL_PAYLOAD, 0, 0);
538 struct_ep_qh_setup(udc, 0, USB_SEND, USB_ENDPOINT_XFER_CONTROL,
539 USB_MAX_CTRL_PAYLOAD, 0, 0);
540 dr_ep_setup(0, USB_RECV, USB_ENDPOINT_XFER_CONTROL);
541 dr_ep_setup(0, USB_SEND, USB_ENDPOINT_XFER_CONTROL);
542
543 return;
544
545}
546
547/***********************************************************************
548 Endpoint Management Functions
549***********************************************************************/
550
551/*-------------------------------------------------------------------------
552 * when configurations are set, or when interface settings change
553 * for example the do_set_interface() in gadget layer,
554 * the driver will enable or disable the relevant endpoints
555 * ep0 doesn't use this routine. It is always enabled.
556-------------------------------------------------------------------------*/
557static int fsl_ep_enable(struct usb_ep *_ep,
558 const struct usb_endpoint_descriptor *desc)
559{
560 struct fsl_udc *udc = NULL;
561 struct fsl_ep *ep = NULL;
562 unsigned short max = 0;
563 unsigned char mult = 0, zlt;
564 int retval = -EINVAL;
565 unsigned long flags = 0;
566
567 ep = container_of(_ep, struct fsl_ep, ep);
568
569 /* catch various bogus parameters */
570 if (!_ep || !desc
571 || (desc->bDescriptorType != USB_DT_ENDPOINT))
572 return -EINVAL;
573
574 udc = ep->udc;
575
576 if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN))
577 return -ESHUTDOWN;
578
579 max = usb_endpoint_maxp(desc);
580
581 /* Disable automatic zlp generation. Driver is responsible to indicate
582 * explicitly through req->req.zero. This is needed to enable multi-td
583 * request. */
584 zlt = 1;
585
586 /* Assume the max packet size from gadget is always correct */
587 switch (desc->bmAttributes & 0x03) {
588 case USB_ENDPOINT_XFER_CONTROL:
589 case USB_ENDPOINT_XFER_BULK:
590 case USB_ENDPOINT_XFER_INT:
591 /* mult = 0. Execute N Transactions as demonstrated by
592 * the USB variable length packet protocol where N is
593 * computed using the Maximum Packet Length (dQH) and
594 * the Total Bytes field (dTD) */
595 mult = 0;
596 break;
597 case USB_ENDPOINT_XFER_ISOC:
598 /* Calculate transactions needed for high bandwidth iso */
599 mult = (unsigned char)(1 + ((max >> 11) & 0x03));
600 max = max & 0x7ff; /* bit 0~10 */
601 /* 3 transactions at most */
602 if (mult > 3)
603 goto en_done;
604 break;
605 default:
606 goto en_done;
607 }
608
609 spin_lock_irqsave(&udc->lock, flags);
610 ep->ep.maxpacket = max;
611 ep->ep.desc = desc;
612 ep->stopped = 0;
613
614 /* Controller related setup */
615 /* Init EPx Queue Head (Ep Capabilites field in QH
616 * according to max, zlt, mult) */
617 struct_ep_qh_setup(udc, (unsigned char) ep_index(ep),
618 (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
619 ? USB_SEND : USB_RECV),
620 (unsigned char) (desc->bmAttributes
621 & USB_ENDPOINT_XFERTYPE_MASK),
622 max, zlt, mult);
623
624 /* Init endpoint ctrl register */
625 dr_ep_setup((unsigned char) ep_index(ep),
626 (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
627 ? USB_SEND : USB_RECV),
628 (unsigned char) (desc->bmAttributes
629 & USB_ENDPOINT_XFERTYPE_MASK));
630
631 spin_unlock_irqrestore(&udc->lock, flags);
632 retval = 0;
633
634 VDBG("enabled %s (ep%d%s) maxpacket %d",ep->ep.name,
635 ep->ep.desc->bEndpointAddress & 0x0f,
636 (desc->bEndpointAddress & USB_DIR_IN)
637 ? "in" : "out", max);
638en_done:
639 return retval;
640}
641
642/*---------------------------------------------------------------------
643 * @ep : the ep being unconfigured. May not be ep0
644 * Any pending and uncomplete req will complete with status (-ESHUTDOWN)
645*---------------------------------------------------------------------*/
646static int fsl_ep_disable(struct usb_ep *_ep)
647{
648 struct fsl_udc *udc = NULL;
649 struct fsl_ep *ep = NULL;
650 unsigned long flags = 0;
651 u32 epctrl;
652 int ep_num;
653
654 ep = container_of(_ep, struct fsl_ep, ep);
655 if (!_ep || !ep->ep.desc) {
656 VDBG("%s not enabled", _ep ? ep->ep.name : NULL);
657 return -EINVAL;
658 }
659
660 /* disable ep on controller */
661 ep_num = ep_index(ep);
662 epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
663 if (ep_is_in(ep)) {
664 epctrl &= ~(EPCTRL_TX_ENABLE | EPCTRL_TX_TYPE);
665 epctrl |= EPCTRL_EP_TYPE_BULK << EPCTRL_TX_EP_TYPE_SHIFT;
666 } else {
667 epctrl &= ~(EPCTRL_RX_ENABLE | EPCTRL_TX_TYPE);
668 epctrl |= EPCTRL_EP_TYPE_BULK << EPCTRL_RX_EP_TYPE_SHIFT;
669 }
670 fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
671
672 udc = (struct fsl_udc *)ep->udc;
673 spin_lock_irqsave(&udc->lock, flags);
674
675 /* nuke all pending requests (does flush) */
676 nuke(ep, -ESHUTDOWN);
677
678 ep->ep.desc = NULL;
679 ep->stopped = 1;
680 spin_unlock_irqrestore(&udc->lock, flags);
681
682 VDBG("disabled %s OK", _ep->name);
683 return 0;
684}
685
686/*---------------------------------------------------------------------
687 * allocate a request object used by this endpoint
688 * the main operation is to insert the req->queue to the eq->queue
689 * Returns the request, or null if one could not be allocated
690*---------------------------------------------------------------------*/
691static struct usb_request *
692fsl_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
693{
694 struct fsl_req *req = NULL;
695
696 req = kzalloc(sizeof *req, gfp_flags);
697 if (!req)
698 return NULL;
699
700 req->req.dma = DMA_ADDR_INVALID;
701 INIT_LIST_HEAD(&req->queue);
702
703 return &req->req;
704}
705
706static void fsl_free_request(struct usb_ep *_ep, struct usb_request *_req)
707{
708 struct fsl_req *req = NULL;
709
710 req = container_of(_req, struct fsl_req, req);
711
712 if (_req)
713 kfree(req);
714}
715
716/* Actually add a dTD chain to an empty dQH and let go */
717static void fsl_prime_ep(struct fsl_ep *ep, struct ep_td_struct *td)
718{
719 struct ep_queue_head *qh = get_qh_by_ep(ep);
720
721 /* Write dQH next pointer and terminate bit to 0 */
722 qh->next_dtd_ptr = cpu_to_hc32(td->td_dma
723 & EP_QUEUE_HEAD_NEXT_POINTER_MASK);
724
725 /* Clear active and halt bit */
726 qh->size_ioc_int_sts &= cpu_to_hc32(~(EP_QUEUE_HEAD_STATUS_ACTIVE
727 | EP_QUEUE_HEAD_STATUS_HALT));
728
729 /* Ensure that updates to the QH will occur before priming. */
730 wmb();
731
732 /* Prime endpoint by writing correct bit to ENDPTPRIME */
733 fsl_writel(ep_is_in(ep) ? (1 << (ep_index(ep) + 16))
734 : (1 << (ep_index(ep))), &dr_regs->endpointprime);
735}
736
737/* Add dTD chain to the dQH of an EP */
738static void fsl_queue_td(struct fsl_ep *ep, struct fsl_req *req)
739{
740 u32 temp, bitmask, tmp_stat;
741
742 /* VDBG("QH addr Register 0x%8x", dr_regs->endpointlistaddr);
743 VDBG("ep_qh[%d] addr is 0x%8x", i, (u32)&(ep->udc->ep_qh[i])); */
744
745 bitmask = ep_is_in(ep)
746 ? (1 << (ep_index(ep) + 16))
747 : (1 << (ep_index(ep)));
748
749 /* check if the pipe is empty */
750 if (!(list_empty(&ep->queue)) && !(ep_index(ep) == 0)) {
751 /* Add td to the end */
752 struct fsl_req *lastreq;
753 lastreq = list_entry(ep->queue.prev, struct fsl_req, queue);
754 lastreq->tail->next_td_ptr =
755 cpu_to_hc32(req->head->td_dma & DTD_ADDR_MASK);
756 /* Ensure dTD's next dtd pointer to be updated */
757 wmb();
758 /* Read prime bit, if 1 goto done */
759 if (fsl_readl(&dr_regs->endpointprime) & bitmask)
760 return;
761
762 do {
763 /* Set ATDTW bit in USBCMD */
764 temp = fsl_readl(&dr_regs->usbcmd);
765 fsl_writel(temp | USB_CMD_ATDTW, &dr_regs->usbcmd);
766
767 /* Read correct status bit */
768 tmp_stat = fsl_readl(&dr_regs->endptstatus) & bitmask;
769
770 } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_ATDTW));
771
772 /* Write ATDTW bit to 0 */
773 temp = fsl_readl(&dr_regs->usbcmd);
774 fsl_writel(temp & ~USB_CMD_ATDTW, &dr_regs->usbcmd);
775
776 if (tmp_stat)
777 return;
778 }
779
780 fsl_prime_ep(ep, req->head);
781}
782
783/* Fill in the dTD structure
784 * @req: request that the transfer belongs to
785 * @length: return actually data length of the dTD
786 * @dma: return dma address of the dTD
787 * @is_last: return flag if it is the last dTD of the request
788 * return: pointer to the built dTD */
789static struct ep_td_struct *fsl_build_dtd(struct fsl_req *req, unsigned *length,
790 dma_addr_t *dma, int *is_last, gfp_t gfp_flags)
791{
792 u32 swap_temp;
793 struct ep_td_struct *dtd;
794
795 /* how big will this transfer be? */
796 *length = min(req->req.length - req->req.actual,
797 (unsigned)EP_MAX_LENGTH_TRANSFER);
798
799 dtd = dma_pool_alloc(udc_controller->td_pool, gfp_flags, dma);
800 if (dtd == NULL)
801 return dtd;
802
803 dtd->td_dma = *dma;
804 /* Clear reserved field */
805 swap_temp = hc32_to_cpu(dtd->size_ioc_sts);
806 swap_temp &= ~DTD_RESERVED_FIELDS;
807 dtd->size_ioc_sts = cpu_to_hc32(swap_temp);
808
809 /* Init all of buffer page pointers */
810 swap_temp = (u32) (req->req.dma + req->req.actual);
811 dtd->buff_ptr0 = cpu_to_hc32(swap_temp);
812 dtd->buff_ptr1 = cpu_to_hc32(swap_temp + 0x1000);
813 dtd->buff_ptr2 = cpu_to_hc32(swap_temp + 0x2000);
814 dtd->buff_ptr3 = cpu_to_hc32(swap_temp + 0x3000);
815 dtd->buff_ptr4 = cpu_to_hc32(swap_temp + 0x4000);
816
817 req->req.actual += *length;
818
819 /* zlp is needed if req->req.zero is set */
820 if (req->req.zero) {
821 if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0)
822 *is_last = 1;
823 else
824 *is_last = 0;
825 } else if (req->req.length == req->req.actual)
826 *is_last = 1;
827 else
828 *is_last = 0;
829
830 if ((*is_last) == 0)
831 VDBG("multi-dtd request!");
832 /* Fill in the transfer size; set active bit */
833 swap_temp = ((*length << DTD_LENGTH_BIT_POS) | DTD_STATUS_ACTIVE);
834
835 /* Enable interrupt for the last dtd of a request */
836 if (*is_last && !req->req.no_interrupt)
837 swap_temp |= DTD_IOC;
838
839 dtd->size_ioc_sts = cpu_to_hc32(swap_temp);
840
841 mb();
842
843 VDBG("length = %d address= 0x%x", *length, (int)*dma);
844
845 return dtd;
846}
847
848/* Generate dtd chain for a request */
849static int fsl_req_to_dtd(struct fsl_req *req, gfp_t gfp_flags)
850{
851 unsigned count;
852 int is_last;
853 int is_first =1;
854 struct ep_td_struct *last_dtd = NULL, *dtd;
855 dma_addr_t dma;
856
857 do {
858 dtd = fsl_build_dtd(req, &count, &dma, &is_last, gfp_flags);
859 if (dtd == NULL)
860 return -ENOMEM;
861
862 if (is_first) {
863 is_first = 0;
864 req->head = dtd;
865 } else {
866 last_dtd->next_td_ptr = cpu_to_hc32(dma);
867 last_dtd->next_td_virt = dtd;
868 }
869 last_dtd = dtd;
870
871 req->dtd_count++;
872 } while (!is_last);
873
874 dtd->next_td_ptr = cpu_to_hc32(DTD_NEXT_TERMINATE);
875
876 req->tail = dtd;
877
878 return 0;
879}
880
881/* queues (submits) an I/O request to an endpoint */
882static int
883fsl_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
884{
885 struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
886 struct fsl_req *req = container_of(_req, struct fsl_req, req);
887 struct fsl_udc *udc;
888 unsigned long flags;
889
890 /* catch various bogus parameters */
891 if (!_req || !req->req.complete || !req->req.buf
892 || !list_empty(&req->queue)) {
893 VDBG("%s, bad params", __func__);
894 return -EINVAL;
895 }
896 if (unlikely(!_ep || !ep->ep.desc)) {
897 VDBG("%s, bad ep", __func__);
898 return -EINVAL;
899 }
900 if (usb_endpoint_xfer_isoc(ep->ep.desc)) {
901 if (req->req.length > ep->ep.maxpacket)
902 return -EMSGSIZE;
903 }
904
905 udc = ep->udc;
906 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
907 return -ESHUTDOWN;
908
909 req->ep = ep;
910
911 /* map virtual address to hardware */
912 if (req->req.dma == DMA_ADDR_INVALID) {
913 req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
914 req->req.buf,
915 req->req.length, ep_is_in(ep)
916 ? DMA_TO_DEVICE
917 : DMA_FROM_DEVICE);
918 req->mapped = 1;
919 } else {
920 dma_sync_single_for_device(ep->udc->gadget.dev.parent,
921 req->req.dma, req->req.length,
922 ep_is_in(ep)
923 ? DMA_TO_DEVICE
924 : DMA_FROM_DEVICE);
925 req->mapped = 0;
926 }
927
928 req->req.status = -EINPROGRESS;
929 req->req.actual = 0;
930 req->dtd_count = 0;
931
932 /* build dtds and push them to device queue */
933 if (!fsl_req_to_dtd(req, gfp_flags)) {
934 spin_lock_irqsave(&udc->lock, flags);
935 fsl_queue_td(ep, req);
936 } else {
937 return -ENOMEM;
938 }
939
940 /* irq handler advances the queue */
941 if (req != NULL)
942 list_add_tail(&req->queue, &ep->queue);
943 spin_unlock_irqrestore(&udc->lock, flags);
944
945 return 0;
946}
947
948/* dequeues (cancels, unlinks) an I/O request from an endpoint */
949static int fsl_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
950{
951 struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
952 struct fsl_req *req;
953 unsigned long flags;
954 int ep_num, stopped, ret = 0;
955 u32 epctrl;
956
957 if (!_ep || !_req)
958 return -EINVAL;
959
960 spin_lock_irqsave(&ep->udc->lock, flags);
961 stopped = ep->stopped;
962
963 /* Stop the ep before we deal with the queue */
964 ep->stopped = 1;
965 ep_num = ep_index(ep);
966 epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
967 if (ep_is_in(ep))
968 epctrl &= ~EPCTRL_TX_ENABLE;
969 else
970 epctrl &= ~EPCTRL_RX_ENABLE;
971 fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
972
973 /* make sure it's actually queued on this endpoint */
974 list_for_each_entry(req, &ep->queue, queue) {
975 if (&req->req == _req)
976 break;
977 }
978 if (&req->req != _req) {
979 ret = -EINVAL;
980 goto out;
981 }
982
983 /* The request is in progress, or completed but not dequeued */
984 if (ep->queue.next == &req->queue) {
985 _req->status = -ECONNRESET;
986 fsl_ep_fifo_flush(_ep); /* flush current transfer */
987
988 /* The request isn't the last request in this ep queue */
989 if (req->queue.next != &ep->queue) {
990 struct fsl_req *next_req;
991
992 next_req = list_entry(req->queue.next, struct fsl_req,
993 queue);
994
995 /* prime with dTD of next request */
996 fsl_prime_ep(ep, next_req->head);
997 }
998 /* The request hasn't been processed, patch up the TD chain */
999 } else {
1000 struct fsl_req *prev_req;
1001
1002 prev_req = list_entry(req->queue.prev, struct fsl_req, queue);
1003 prev_req->tail->next_td_ptr = req->tail->next_td_ptr;
1004 }
1005
1006 done(ep, req, -ECONNRESET);
1007
1008 /* Enable EP */
1009out: epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
1010 if (ep_is_in(ep))
1011 epctrl |= EPCTRL_TX_ENABLE;
1012 else
1013 epctrl |= EPCTRL_RX_ENABLE;
1014 fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
1015 ep->stopped = stopped;
1016
1017 spin_unlock_irqrestore(&ep->udc->lock, flags);
1018 return ret;
1019}
1020
1021/*-------------------------------------------------------------------------*/
1022
1023/*-----------------------------------------------------------------
1024 * modify the endpoint halt feature
1025 * @ep: the non-isochronous endpoint being stalled
1026 * @value: 1--set halt 0--clear halt
1027 * Returns zero, or a negative error code.
1028*----------------------------------------------------------------*/
1029static int fsl_ep_set_halt(struct usb_ep *_ep, int value)
1030{
1031 struct fsl_ep *ep = NULL;
1032 unsigned long flags = 0;
1033 int status = -EOPNOTSUPP; /* operation not supported */
1034 unsigned char ep_dir = 0, ep_num = 0;
1035 struct fsl_udc *udc = NULL;
1036
1037 ep = container_of(_ep, struct fsl_ep, ep);
1038 udc = ep->udc;
1039 if (!_ep || !ep->ep.desc) {
1040 status = -EINVAL;
1041 goto out;
1042 }
1043
1044 if (usb_endpoint_xfer_isoc(ep->ep.desc)) {
1045 status = -EOPNOTSUPP;
1046 goto out;
1047 }
1048
1049 /* Attempt to halt IN ep will fail if any transfer requests
1050 * are still queue */
1051 if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
1052 status = -EAGAIN;
1053 goto out;
1054 }
1055
1056 status = 0;
1057 ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
1058 ep_num = (unsigned char)(ep_index(ep));
1059 spin_lock_irqsave(&ep->udc->lock, flags);
1060 dr_ep_change_stall(ep_num, ep_dir, value);
1061 spin_unlock_irqrestore(&ep->udc->lock, flags);
1062
1063 if (ep_index(ep) == 0) {
1064 udc->ep0_state = WAIT_FOR_SETUP;
1065 udc->ep0_dir = 0;
1066 }
1067out:
1068 VDBG(" %s %s halt stat %d", ep->ep.name,
1069 value ? "set" : "clear", status);
1070
1071 return status;
1072}
1073
1074static int fsl_ep_fifo_status(struct usb_ep *_ep)
1075{
1076 struct fsl_ep *ep;
1077 struct fsl_udc *udc;
1078 int size = 0;
1079 u32 bitmask;
1080 struct ep_queue_head *qh;
1081
1082 ep = container_of(_ep, struct fsl_ep, ep);
1083 if (!_ep || (!ep->ep.desc && ep_index(ep) != 0))
1084 return -ENODEV;
1085
1086 udc = (struct fsl_udc *)ep->udc;
1087
1088 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
1089 return -ESHUTDOWN;
1090
1091 qh = get_qh_by_ep(ep);
1092
1093 bitmask = (ep_is_in(ep)) ? (1 << (ep_index(ep) + 16)) :
1094 (1 << (ep_index(ep)));
1095
1096 if (fsl_readl(&dr_regs->endptstatus) & bitmask)
1097 size = (qh->size_ioc_int_sts & DTD_PACKET_SIZE)
1098 >> DTD_LENGTH_BIT_POS;
1099
1100 pr_debug("%s %u\n", __func__, size);
1101 return size;
1102}
1103
1104static void fsl_ep_fifo_flush(struct usb_ep *_ep)
1105{
1106 struct fsl_ep *ep;
1107 int ep_num, ep_dir;
1108 u32 bits;
1109 unsigned long timeout;
1110#define FSL_UDC_FLUSH_TIMEOUT 1000
1111
1112 if (!_ep) {
1113 return;
1114 } else {
1115 ep = container_of(_ep, struct fsl_ep, ep);
1116 if (!ep->ep.desc)
1117 return;
1118 }
1119 ep_num = ep_index(ep);
1120 ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
1121
1122 if (ep_num == 0)
1123 bits = (1 << 16) | 1;
1124 else if (ep_dir == USB_SEND)
1125 bits = 1 << (16 + ep_num);
1126 else
1127 bits = 1 << ep_num;
1128
1129 timeout = jiffies + FSL_UDC_FLUSH_TIMEOUT;
1130 do {
1131 fsl_writel(bits, &dr_regs->endptflush);
1132
1133 /* Wait until flush complete */
1134 while (fsl_readl(&dr_regs->endptflush)) {
1135 if (time_after(jiffies, timeout)) {
1136 ERR("ep flush timeout\n");
1137 return;
1138 }
1139 cpu_relax();
1140 }
1141 /* See if we need to flush again */
1142 } while (fsl_readl(&dr_regs->endptstatus) & bits);
1143}
1144
1145static struct usb_ep_ops fsl_ep_ops = {
1146 .enable = fsl_ep_enable,
1147 .disable = fsl_ep_disable,
1148
1149 .alloc_request = fsl_alloc_request,
1150 .free_request = fsl_free_request,
1151
1152 .queue = fsl_ep_queue,
1153 .dequeue = fsl_ep_dequeue,
1154
1155 .set_halt = fsl_ep_set_halt,
1156 .fifo_status = fsl_ep_fifo_status,
1157 .fifo_flush = fsl_ep_fifo_flush, /* flush fifo */
1158};
1159
1160/*-------------------------------------------------------------------------
1161 Gadget Driver Layer Operations
1162-------------------------------------------------------------------------*/
1163
1164/*----------------------------------------------------------------------
1165 * Get the current frame number (from DR frame_index Reg )
1166 *----------------------------------------------------------------------*/
1167static int fsl_get_frame(struct usb_gadget *gadget)
1168{
1169 return (int)(fsl_readl(&dr_regs->frindex) & USB_FRINDEX_MASKS);
1170}
1171
1172/*-----------------------------------------------------------------------
1173 * Tries to wake up the host connected to this gadget
1174 -----------------------------------------------------------------------*/
1175static int fsl_wakeup(struct usb_gadget *gadget)
1176{
1177 struct fsl_udc *udc = container_of(gadget, struct fsl_udc, gadget);
1178 u32 portsc;
1179
1180 /* Remote wakeup feature not enabled by host */
1181 if (!udc->remote_wakeup)
1182 return -ENOTSUPP;
1183
1184 portsc = fsl_readl(&dr_regs->portsc1);
1185 /* not suspended? */
1186 if (!(portsc & PORTSCX_PORT_SUSPEND))
1187 return 0;
1188 /* trigger force resume */
1189 portsc |= PORTSCX_PORT_FORCE_RESUME;
1190 fsl_writel(portsc, &dr_regs->portsc1);
1191 return 0;
1192}
1193
1194static int can_pullup(struct fsl_udc *udc)
1195{
1196 return udc->driver && udc->softconnect && udc->vbus_active;
1197}
1198
1199/* Notify controller that VBUS is powered, Called by whatever
1200 detects VBUS sessions */
1201static int fsl_vbus_session(struct usb_gadget *gadget, int is_active)
1202{
1203 struct fsl_udc *udc;
1204 unsigned long flags;
1205
1206 udc = container_of(gadget, struct fsl_udc, gadget);
1207 spin_lock_irqsave(&udc->lock, flags);
1208 VDBG("VBUS %s", is_active ? "on" : "off");
1209 udc->vbus_active = (is_active != 0);
1210 if (can_pullup(udc))
1211 fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
1212 &dr_regs->usbcmd);
1213 else
1214 fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
1215 &dr_regs->usbcmd);
1216 spin_unlock_irqrestore(&udc->lock, flags);
1217 return 0;
1218}
1219
1220/* constrain controller's VBUS power usage
1221 * This call is used by gadget drivers during SET_CONFIGURATION calls,
1222 * reporting how much power the device may consume. For example, this
1223 * could affect how quickly batteries are recharged.
1224 *
1225 * Returns zero on success, else negative errno.
1226 */
1227static int fsl_vbus_draw(struct usb_gadget *gadget, unsigned mA)
1228{
1229 struct fsl_udc *udc;
1230
1231 udc = container_of(gadget, struct fsl_udc, gadget);
1232 if (udc->transceiver)
1233 return usb_phy_set_power(udc->transceiver, mA);
1234 return -ENOTSUPP;
1235}
1236
1237/* Change Data+ pullup status
1238 * this func is used by usb_gadget_connect/disconnet
1239 */
1240static int fsl_pullup(struct usb_gadget *gadget, int is_on)
1241{
1242 struct fsl_udc *udc;
1243
1244 udc = container_of(gadget, struct fsl_udc, gadget);
1245 udc->softconnect = (is_on != 0);
1246 if (can_pullup(udc))
1247 fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
1248 &dr_regs->usbcmd);
1249 else
1250 fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
1251 &dr_regs->usbcmd);
1252
1253 return 0;
1254}
1255
1256static int fsl_start(struct usb_gadget_driver *driver,
1257 int (*bind)(struct usb_gadget *));
1258static int fsl_stop(struct usb_gadget_driver *driver);
1259/* defined in gadget.h */
1260static struct usb_gadget_ops fsl_gadget_ops = {
1261 .get_frame = fsl_get_frame,
1262 .wakeup = fsl_wakeup,
1263/* .set_selfpowered = fsl_set_selfpowered, */ /* Always selfpowered */
1264 .vbus_session = fsl_vbus_session,
1265 .vbus_draw = fsl_vbus_draw,
1266 .pullup = fsl_pullup,
1267 .start = fsl_start,
1268 .stop = fsl_stop,
1269};
1270
1271/* Set protocol stall on ep0, protocol stall will automatically be cleared
1272 on new transaction */
1273static void ep0stall(struct fsl_udc *udc)
1274{
1275 u32 tmp;
1276
1277 /* must set tx and rx to stall at the same time */
1278 tmp = fsl_readl(&dr_regs->endptctrl[0]);
1279 tmp |= EPCTRL_TX_EP_STALL | EPCTRL_RX_EP_STALL;
1280 fsl_writel(tmp, &dr_regs->endptctrl[0]);
1281 udc->ep0_state = WAIT_FOR_SETUP;
1282 udc->ep0_dir = 0;
1283}
1284
1285/* Prime a status phase for ep0 */
1286static int ep0_prime_status(struct fsl_udc *udc, int direction)
1287{
1288 struct fsl_req *req = udc->status_req;
1289 struct fsl_ep *ep;
1290
1291 if (direction == EP_DIR_IN)
1292 udc->ep0_dir = USB_DIR_IN;
1293 else
1294 udc->ep0_dir = USB_DIR_OUT;
1295
1296 ep = &udc->eps[0];
1297 if (udc->ep0_state != DATA_STATE_XMIT)
1298 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1299
1300 req->ep = ep;
1301 req->req.length = 0;
1302 req->req.status = -EINPROGRESS;
1303 req->req.actual = 0;
1304 req->req.complete = NULL;
1305 req->dtd_count = 0;
1306
1307 req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
1308 req->req.buf, req->req.length,
1309 ep_is_in(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
1310 req->mapped = 1;
1311
1312 if (fsl_req_to_dtd(req, GFP_ATOMIC) == 0)
1313 fsl_queue_td(ep, req);
1314 else
1315 return -ENOMEM;
1316
1317 list_add_tail(&req->queue, &ep->queue);
1318
1319 return 0;
1320}
1321
1322static void udc_reset_ep_queue(struct fsl_udc *udc, u8 pipe)
1323{
1324 struct fsl_ep *ep = get_ep_by_pipe(udc, pipe);
1325
1326 if (ep->name)
1327 nuke(ep, -ESHUTDOWN);
1328}
1329
1330/*
1331 * ch9 Set address
1332 */
1333static void ch9setaddress(struct fsl_udc *udc, u16 value, u16 index, u16 length)
1334{
1335 /* Save the new address to device struct */
1336 udc->device_address = (u8) value;
1337 /* Update usb state */
1338 udc->usb_state = USB_STATE_ADDRESS;
1339 /* Status phase */
1340 if (ep0_prime_status(udc, EP_DIR_IN))
1341 ep0stall(udc);
1342}
1343
1344/*
1345 * ch9 Get status
1346 */
1347static void ch9getstatus(struct fsl_udc *udc, u8 request_type, u16 value,
1348 u16 index, u16 length)
1349{
1350 u16 tmp = 0; /* Status, cpu endian */
1351 struct fsl_req *req;
1352 struct fsl_ep *ep;
1353
1354 ep = &udc->eps[0];
1355
1356 if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1357 /* Get device status */
1358 tmp = 1 << USB_DEVICE_SELF_POWERED;
1359 tmp |= udc->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP;
1360 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
1361 /* Get interface status */
1362 /* We don't have interface information in udc driver */
1363 tmp = 0;
1364 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
1365 /* Get endpoint status */
1366 struct fsl_ep *target_ep;
1367
1368 target_ep = get_ep_by_pipe(udc, get_pipe_by_windex(index));
1369
1370 /* stall if endpoint doesn't exist */
1371 if (!target_ep->ep.desc)
1372 goto stall;
1373 tmp = dr_ep_get_stall(ep_index(target_ep), ep_is_in(target_ep))
1374 << USB_ENDPOINT_HALT;
1375 }
1376
1377 udc->ep0_dir = USB_DIR_IN;
1378 /* Borrow the per device status_req */
1379 req = udc->status_req;
1380 /* Fill in the reqest structure */
1381 *((u16 *) req->req.buf) = cpu_to_le16(tmp);
1382
1383 req->ep = ep;
1384 req->req.length = 2;
1385 req->req.status = -EINPROGRESS;
1386 req->req.actual = 0;
1387 req->req.complete = NULL;
1388 req->dtd_count = 0;
1389
1390 req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
1391 req->req.buf, req->req.length,
1392 ep_is_in(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
1393 req->mapped = 1;
1394
1395 /* prime the data phase */
1396 if ((fsl_req_to_dtd(req, GFP_ATOMIC) == 0))
1397 fsl_queue_td(ep, req);
1398 else /* no mem */
1399 goto stall;
1400
1401 list_add_tail(&req->queue, &ep->queue);
1402 udc->ep0_state = DATA_STATE_XMIT;
1403 if (ep0_prime_status(udc, EP_DIR_OUT))
1404 ep0stall(udc);
1405
1406 return;
1407stall:
1408 ep0stall(udc);
1409}
1410
1411static void setup_received_irq(struct fsl_udc *udc,
1412 struct usb_ctrlrequest *setup)
1413{
1414 u16 wValue = le16_to_cpu(setup->wValue);
1415 u16 wIndex = le16_to_cpu(setup->wIndex);
1416 u16 wLength = le16_to_cpu(setup->wLength);
1417
1418 udc_reset_ep_queue(udc, 0);
1419
1420 /* We process some stardard setup requests here */
1421 switch (setup->bRequest) {
1422 case USB_REQ_GET_STATUS:
1423 /* Data+Status phase from udc */
1424 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
1425 != (USB_DIR_IN | USB_TYPE_STANDARD))
1426 break;
1427 ch9getstatus(udc, setup->bRequestType, wValue, wIndex, wLength);
1428 return;
1429
1430 case USB_REQ_SET_ADDRESS:
1431 /* Status phase from udc */
1432 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD
1433 | USB_RECIP_DEVICE))
1434 break;
1435 ch9setaddress(udc, wValue, wIndex, wLength);
1436 return;
1437
1438 case USB_REQ_CLEAR_FEATURE:
1439 case USB_REQ_SET_FEATURE:
1440 /* Status phase from udc */
1441 {
1442 int rc = -EOPNOTSUPP;
1443 u16 ptc = 0;
1444
1445 if ((setup->bRequestType & (USB_RECIP_MASK | USB_TYPE_MASK))
1446 == (USB_RECIP_ENDPOINT | USB_TYPE_STANDARD)) {
1447 int pipe = get_pipe_by_windex(wIndex);
1448 struct fsl_ep *ep;
1449
1450 if (wValue != 0 || wLength != 0 || pipe >= udc->max_ep)
1451 break;
1452 ep = get_ep_by_pipe(udc, pipe);
1453
1454 spin_unlock(&udc->lock);
1455 rc = fsl_ep_set_halt(&ep->ep,
1456 (setup->bRequest == USB_REQ_SET_FEATURE)
1457 ? 1 : 0);
1458 spin_lock(&udc->lock);
1459
1460 } else if ((setup->bRequestType & (USB_RECIP_MASK
1461 | USB_TYPE_MASK)) == (USB_RECIP_DEVICE
1462 | USB_TYPE_STANDARD)) {
1463 /* Note: The driver has not include OTG support yet.
1464 * This will be set when OTG support is added */
1465 if (wValue == USB_DEVICE_TEST_MODE)
1466 ptc = wIndex >> 8;
1467 else if (gadget_is_otg(&udc->gadget)) {
1468 if (setup->bRequest ==
1469 USB_DEVICE_B_HNP_ENABLE)
1470 udc->gadget.b_hnp_enable = 1;
1471 else if (setup->bRequest ==
1472 USB_DEVICE_A_HNP_SUPPORT)
1473 udc->gadget.a_hnp_support = 1;
1474 else if (setup->bRequest ==
1475 USB_DEVICE_A_ALT_HNP_SUPPORT)
1476 udc->gadget.a_alt_hnp_support = 1;
1477 }
1478 rc = 0;
1479 } else
1480 break;
1481
1482 if (rc == 0) {
1483 if (ep0_prime_status(udc, EP_DIR_IN))
1484 ep0stall(udc);
1485 }
1486 if (ptc) {
1487 u32 tmp;
1488
1489 mdelay(10);
1490 tmp = fsl_readl(&dr_regs->portsc1) | (ptc << 16);
1491 fsl_writel(tmp, &dr_regs->portsc1);
1492 printk(KERN_INFO "udc: switch to test mode %d.\n", ptc);
1493 }
1494
1495 return;
1496 }
1497
1498 default:
1499 break;
1500 }
1501
1502 /* Requests handled by gadget */
1503 if (wLength) {
1504 /* Data phase from gadget, status phase from udc */
1505 udc->ep0_dir = (setup->bRequestType & USB_DIR_IN)
1506 ? USB_DIR_IN : USB_DIR_OUT;
1507 spin_unlock(&udc->lock);
1508 if (udc->driver->setup(&udc->gadget,
1509 &udc->local_setup_buff) < 0)
1510 ep0stall(udc);
1511 spin_lock(&udc->lock);
1512 udc->ep0_state = (setup->bRequestType & USB_DIR_IN)
1513 ? DATA_STATE_XMIT : DATA_STATE_RECV;
1514 /*
1515 * If the data stage is IN, send status prime immediately.
1516 * See 2.0 Spec chapter 8.5.3.3 for detail.
1517 */
1518 if (udc->ep0_state == DATA_STATE_XMIT)
1519 if (ep0_prime_status(udc, EP_DIR_OUT))
1520 ep0stall(udc);
1521
1522 } else {
1523 /* No data phase, IN status from gadget */
1524 udc->ep0_dir = USB_DIR_IN;
1525 spin_unlock(&udc->lock);
1526 if (udc->driver->setup(&udc->gadget,
1527 &udc->local_setup_buff) < 0)
1528 ep0stall(udc);
1529 spin_lock(&udc->lock);
1530 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1531 }
1532}
1533
1534/* Process request for Data or Status phase of ep0
1535 * prime status phase if needed */
1536static void ep0_req_complete(struct fsl_udc *udc, struct fsl_ep *ep0,
1537 struct fsl_req *req)
1538{
1539 if (udc->usb_state == USB_STATE_ADDRESS) {
1540 /* Set the new address */
1541 u32 new_address = (u32) udc->device_address;
1542 fsl_writel(new_address << USB_DEVICE_ADDRESS_BIT_POS,
1543 &dr_regs->deviceaddr);
1544 }
1545
1546 done(ep0, req, 0);
1547
1548 switch (udc->ep0_state) {
1549 case DATA_STATE_XMIT:
1550 /* already primed at setup_received_irq */
1551 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1552 break;
1553 case DATA_STATE_RECV:
1554 /* send status phase */
1555 if (ep0_prime_status(udc, EP_DIR_IN))
1556 ep0stall(udc);
1557 break;
1558 case WAIT_FOR_OUT_STATUS:
1559 udc->ep0_state = WAIT_FOR_SETUP;
1560 break;
1561 case WAIT_FOR_SETUP:
1562 ERR("Unexpect ep0 packets\n");
1563 break;
1564 default:
1565 ep0stall(udc);
1566 break;
1567 }
1568}
1569
1570/* Tripwire mechanism to ensure a setup packet payload is extracted without
1571 * being corrupted by another incoming setup packet */
1572static void tripwire_handler(struct fsl_udc *udc, u8 ep_num, u8 *buffer_ptr)
1573{
1574 u32 temp;
1575 struct ep_queue_head *qh;
1576 struct fsl_usb2_platform_data *pdata = udc->pdata;
1577
1578 qh = &udc->ep_qh[ep_num * 2 + EP_DIR_OUT];
1579
1580 /* Clear bit in ENDPTSETUPSTAT */
1581 temp = fsl_readl(&dr_regs->endptsetupstat);
1582 fsl_writel(temp | (1 << ep_num), &dr_regs->endptsetupstat);
1583
1584 /* while a hazard exists when setup package arrives */
1585 do {
1586 /* Set Setup Tripwire */
1587 temp = fsl_readl(&dr_regs->usbcmd);
1588 fsl_writel(temp | USB_CMD_SUTW, &dr_regs->usbcmd);
1589
1590 /* Copy the setup packet to local buffer */
1591 if (pdata->le_setup_buf) {
1592 u32 *p = (u32 *)buffer_ptr;
1593 u32 *s = (u32 *)qh->setup_buffer;
1594
1595 /* Convert little endian setup buffer to CPU endian */
1596 *p++ = le32_to_cpu(*s++);
1597 *p = le32_to_cpu(*s);
1598 } else {
1599 memcpy(buffer_ptr, (u8 *) qh->setup_buffer, 8);
1600 }
1601 } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_SUTW));
1602
1603 /* Clear Setup Tripwire */
1604 temp = fsl_readl(&dr_regs->usbcmd);
1605 fsl_writel(temp & ~USB_CMD_SUTW, &dr_regs->usbcmd);
1606}
1607
1608/* process-ep_req(): free the completed Tds for this req */
1609static int process_ep_req(struct fsl_udc *udc, int pipe,
1610 struct fsl_req *curr_req)
1611{
1612 struct ep_td_struct *curr_td;
1613 int td_complete, actual, remaining_length, j, tmp;
1614 int status = 0;
1615 int errors = 0;
1616 struct ep_queue_head *curr_qh = &udc->ep_qh[pipe];
1617 int direction = pipe % 2;
1618
1619 curr_td = curr_req->head;
1620 td_complete = 0;
1621 actual = curr_req->req.length;
1622
1623 for (j = 0; j < curr_req->dtd_count; j++) {
1624 remaining_length = (hc32_to_cpu(curr_td->size_ioc_sts)
1625 & DTD_PACKET_SIZE)
1626 >> DTD_LENGTH_BIT_POS;
1627 actual -= remaining_length;
1628
1629 errors = hc32_to_cpu(curr_td->size_ioc_sts);
1630 if (errors & DTD_ERROR_MASK) {
1631 if (errors & DTD_STATUS_HALTED) {
1632 ERR("dTD error %08x QH=%d\n", errors, pipe);
1633 /* Clear the errors and Halt condition */
1634 tmp = hc32_to_cpu(curr_qh->size_ioc_int_sts);
1635 tmp &= ~errors;
1636 curr_qh->size_ioc_int_sts = cpu_to_hc32(tmp);
1637 status = -EPIPE;
1638 /* FIXME: continue with next queued TD? */
1639
1640 break;
1641 }
1642 if (errors & DTD_STATUS_DATA_BUFF_ERR) {
1643 VDBG("Transfer overflow");
1644 status = -EPROTO;
1645 break;
1646 } else if (errors & DTD_STATUS_TRANSACTION_ERR) {
1647 VDBG("ISO error");
1648 status = -EILSEQ;
1649 break;
1650 } else
1651 ERR("Unknown error has occurred (0x%x)!\n",
1652 errors);
1653
1654 } else if (hc32_to_cpu(curr_td->size_ioc_sts)
1655 & DTD_STATUS_ACTIVE) {
1656 VDBG("Request not complete");
1657 status = REQ_UNCOMPLETE;
1658 return status;
1659 } else if (remaining_length) {
1660 if (direction) {
1661 VDBG("Transmit dTD remaining length not zero");
1662 status = -EPROTO;
1663 break;
1664 } else {
1665 td_complete++;
1666 break;
1667 }
1668 } else {
1669 td_complete++;
1670 VDBG("dTD transmitted successful");
1671 }
1672
1673 if (j != curr_req->dtd_count - 1)
1674 curr_td = (struct ep_td_struct *)curr_td->next_td_virt;
1675 }
1676
1677 if (status)
1678 return status;
1679
1680 curr_req->req.actual = actual;
1681
1682 return 0;
1683}
1684
1685/* Process a DTD completion interrupt */
1686static void dtd_complete_irq(struct fsl_udc *udc)
1687{
1688 u32 bit_pos;
1689 int i, ep_num, direction, bit_mask, status;
1690 struct fsl_ep *curr_ep;
1691 struct fsl_req *curr_req, *temp_req;
1692
1693 /* Clear the bits in the register */
1694 bit_pos = fsl_readl(&dr_regs->endptcomplete);
1695 fsl_writel(bit_pos, &dr_regs->endptcomplete);
1696
1697 if (!bit_pos)
1698 return;
1699
1700 for (i = 0; i < udc->max_ep; i++) {
1701 ep_num = i >> 1;
1702 direction = i % 2;
1703
1704 bit_mask = 1 << (ep_num + 16 * direction);
1705
1706 if (!(bit_pos & bit_mask))
1707 continue;
1708
1709 curr_ep = get_ep_by_pipe(udc, i);
1710
1711 /* If the ep is configured */
1712 if (curr_ep->name == NULL) {
1713 WARNING("Invalid EP?");
1714 continue;
1715 }
1716
1717 /* process the req queue until an uncomplete request */
1718 list_for_each_entry_safe(curr_req, temp_req, &curr_ep->queue,
1719 queue) {
1720 status = process_ep_req(udc, i, curr_req);
1721
1722 VDBG("status of process_ep_req= %d, ep = %d",
1723 status, ep_num);
1724 if (status == REQ_UNCOMPLETE)
1725 break;
1726 /* write back status to req */
1727 curr_req->req.status = status;
1728
1729 if (ep_num == 0) {
1730 ep0_req_complete(udc, curr_ep, curr_req);
1731 break;
1732 } else
1733 done(curr_ep, curr_req, status);
1734 }
1735 }
1736}
1737
1738static inline enum usb_device_speed portscx_device_speed(u32 reg)
1739{
1740 switch (reg & PORTSCX_PORT_SPEED_MASK) {
1741 case PORTSCX_PORT_SPEED_HIGH:
1742 return USB_SPEED_HIGH;
1743 case PORTSCX_PORT_SPEED_FULL:
1744 return USB_SPEED_FULL;
1745 case PORTSCX_PORT_SPEED_LOW:
1746 return USB_SPEED_LOW;
1747 default:
1748 return USB_SPEED_UNKNOWN;
1749 }
1750}
1751
1752/* Process a port change interrupt */
1753static void port_change_irq(struct fsl_udc *udc)
1754{
1755 if (udc->bus_reset)
1756 udc->bus_reset = 0;
1757
1758 /* Bus resetting is finished */
1759 if (!(fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET))
1760 /* Get the speed */
1761 udc->gadget.speed =
1762 portscx_device_speed(fsl_readl(&dr_regs->portsc1));
1763
1764 /* Update USB state */
1765 if (!udc->resume_state)
1766 udc->usb_state = USB_STATE_DEFAULT;
1767}
1768
1769/* Process suspend interrupt */
1770static void suspend_irq(struct fsl_udc *udc)
1771{
1772 udc->resume_state = udc->usb_state;
1773 udc->usb_state = USB_STATE_SUSPENDED;
1774
1775 /* report suspend to the driver, serial.c does not support this */
1776 if (udc->driver->suspend)
1777 udc->driver->suspend(&udc->gadget);
1778}
1779
1780static void bus_resume(struct fsl_udc *udc)
1781{
1782 udc->usb_state = udc->resume_state;
1783 udc->resume_state = 0;
1784
1785 /* report resume to the driver, serial.c does not support this */
1786 if (udc->driver->resume)
1787 udc->driver->resume(&udc->gadget);
1788}
1789
1790/* Clear up all ep queues */
1791static int reset_queues(struct fsl_udc *udc)
1792{
1793 u8 pipe;
1794
1795 for (pipe = 0; pipe < udc->max_pipes; pipe++)
1796 udc_reset_ep_queue(udc, pipe);
1797
1798 /* report disconnect; the driver is already quiesced */
1799 spin_unlock(&udc->lock);
1800 udc->driver->disconnect(&udc->gadget);
1801 spin_lock(&udc->lock);
1802
1803 return 0;
1804}
1805
1806/* Process reset interrupt */
1807static void reset_irq(struct fsl_udc *udc)
1808{
1809 u32 temp;
1810 unsigned long timeout;
1811
1812 /* Clear the device address */
1813 temp = fsl_readl(&dr_regs->deviceaddr);
1814 fsl_writel(temp & ~USB_DEVICE_ADDRESS_MASK, &dr_regs->deviceaddr);
1815
1816 udc->device_address = 0;
1817
1818 /* Clear usb state */
1819 udc->resume_state = 0;
1820 udc->ep0_dir = 0;
1821 udc->ep0_state = WAIT_FOR_SETUP;
1822 udc->remote_wakeup = 0; /* default to 0 on reset */
1823 udc->gadget.b_hnp_enable = 0;
1824 udc->gadget.a_hnp_support = 0;
1825 udc->gadget.a_alt_hnp_support = 0;
1826
1827 /* Clear all the setup token semaphores */
1828 temp = fsl_readl(&dr_regs->endptsetupstat);
1829 fsl_writel(temp, &dr_regs->endptsetupstat);
1830
1831 /* Clear all the endpoint complete status bits */
1832 temp = fsl_readl(&dr_regs->endptcomplete);
1833 fsl_writel(temp, &dr_regs->endptcomplete);
1834
1835 timeout = jiffies + 100;
1836 while (fsl_readl(&dr_regs->endpointprime)) {
1837 /* Wait until all endptprime bits cleared */
1838 if (time_after(jiffies, timeout)) {
1839 ERR("Timeout for reset\n");
1840 break;
1841 }
1842 cpu_relax();
1843 }
1844
1845 /* Write 1s to the flush register */
1846 fsl_writel(0xffffffff, &dr_regs->endptflush);
1847
1848 if (fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET) {
1849 VDBG("Bus reset");
1850 /* Bus is reseting */
1851 udc->bus_reset = 1;
1852 /* Reset all the queues, include XD, dTD, EP queue
1853 * head and TR Queue */
1854 reset_queues(udc);
1855 udc->usb_state = USB_STATE_DEFAULT;
1856 } else {
1857 VDBG("Controller reset");
1858 /* initialize usb hw reg except for regs for EP, not
1859 * touch usbintr reg */
1860 dr_controller_setup(udc);
1861
1862 /* Reset all internal used Queues */
1863 reset_queues(udc);
1864
1865 ep0_setup(udc);
1866
1867 /* Enable DR IRQ reg, Set Run bit, change udc state */
1868 dr_controller_run(udc);
1869 udc->usb_state = USB_STATE_ATTACHED;
1870 }
1871}
1872
1873/*
1874 * USB device controller interrupt handler
1875 */
1876static irqreturn_t fsl_udc_irq(int irq, void *_udc)
1877{
1878 struct fsl_udc *udc = _udc;
1879 u32 irq_src;
1880 irqreturn_t status = IRQ_NONE;
1881 unsigned long flags;
1882
1883 /* Disable ISR for OTG host mode */
1884 if (udc->stopped)
1885 return IRQ_NONE;
1886 spin_lock_irqsave(&udc->lock, flags);
1887 irq_src = fsl_readl(&dr_regs->usbsts) & fsl_readl(&dr_regs->usbintr);
1888 /* Clear notification bits */
1889 fsl_writel(irq_src, &dr_regs->usbsts);
1890
1891 /* VDBG("irq_src [0x%8x]", irq_src); */
1892
1893 /* Need to resume? */
1894 if (udc->usb_state == USB_STATE_SUSPENDED)
1895 if ((fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_SUSPEND) == 0)
1896 bus_resume(udc);
1897
1898 /* USB Interrupt */
1899 if (irq_src & USB_STS_INT) {
1900 VDBG("Packet int");
1901 /* Setup package, we only support ep0 as control ep */
1902 if (fsl_readl(&dr_regs->endptsetupstat) & EP_SETUP_STATUS_EP0) {
1903 tripwire_handler(udc, 0,
1904 (u8 *) (&udc->local_setup_buff));
1905 setup_received_irq(udc, &udc->local_setup_buff);
1906 status = IRQ_HANDLED;
1907 }
1908
1909 /* completion of dtd */
1910 if (fsl_readl(&dr_regs->endptcomplete)) {
1911 dtd_complete_irq(udc);
1912 status = IRQ_HANDLED;
1913 }
1914 }
1915
1916 /* SOF (for ISO transfer) */
1917 if (irq_src & USB_STS_SOF) {
1918 status = IRQ_HANDLED;
1919 }
1920
1921 /* Port Change */
1922 if (irq_src & USB_STS_PORT_CHANGE) {
1923 port_change_irq(udc);
1924 status = IRQ_HANDLED;
1925 }
1926
1927 /* Reset Received */
1928 if (irq_src & USB_STS_RESET) {
1929 VDBG("reset int");
1930 reset_irq(udc);
1931 status = IRQ_HANDLED;
1932 }
1933
1934 /* Sleep Enable (Suspend) */
1935 if (irq_src & USB_STS_SUSPEND) {
1936 suspend_irq(udc);
1937 status = IRQ_HANDLED;
1938 }
1939
1940 if (irq_src & (USB_STS_ERR | USB_STS_SYS_ERR)) {
1941 VDBG("Error IRQ %x", irq_src);
1942 }
1943
1944 spin_unlock_irqrestore(&udc->lock, flags);
1945 return status;
1946}
1947
1948/*----------------------------------------------------------------*
1949 * Hook to gadget drivers
1950 * Called by initialization code of gadget drivers
1951*----------------------------------------------------------------*/
1952static int fsl_start(struct usb_gadget_driver *driver,
1953 int (*bind)(struct usb_gadget *))
1954{
1955 int retval = -ENODEV;
1956 unsigned long flags = 0;
1957
1958 if (!udc_controller)
1959 return -ENODEV;
1960
1961 if (!driver || driver->max_speed < USB_SPEED_FULL
1962 || !bind || !driver->disconnect || !driver->setup)
1963 return -EINVAL;
1964
1965 if (udc_controller->driver)
1966 return -EBUSY;
1967
1968 /* lock is needed but whether should use this lock or another */
1969 spin_lock_irqsave(&udc_controller->lock, flags);
1970
1971 driver->driver.bus = NULL;
1972 /* hook up the driver */
1973 udc_controller->driver = driver;
1974 udc_controller->gadget.dev.driver = &driver->driver;
1975 spin_unlock_irqrestore(&udc_controller->lock, flags);
1976
1977 /* bind udc driver to gadget driver */
1978 retval = bind(&udc_controller->gadget);
1979 if (retval) {
1980 VDBG("bind to %s --> %d", driver->driver.name, retval);
1981 udc_controller->gadget.dev.driver = NULL;
1982 udc_controller->driver = NULL;
1983 goto out;
1984 }
1985
1986 if (udc_controller->transceiver) {
1987 /* Suspend the controller until OTG enable it */
1988 udc_controller->stopped = 1;
1989 printk(KERN_INFO "Suspend udc for OTG auto detect\n");
1990
1991 /* connect to bus through transceiver */
1992 if (udc_controller->transceiver) {
1993 retval = otg_set_peripheral(
1994 udc_controller->transceiver->otg,
1995 &udc_controller->gadget);
1996 if (retval < 0) {
1997 ERR("can't bind to transceiver\n");
1998 driver->unbind(&udc_controller->gadget);
1999 udc_controller->gadget.dev.driver = 0;
2000 udc_controller->driver = 0;
2001 return retval;
2002 }
2003 }
2004 } else {
2005 /* Enable DR IRQ reg and set USBCMD reg Run bit */
2006 dr_controller_run(udc_controller);
2007 udc_controller->usb_state = USB_STATE_ATTACHED;
2008 udc_controller->ep0_state = WAIT_FOR_SETUP;
2009 udc_controller->ep0_dir = 0;
2010 }
2011 printk(KERN_INFO "%s: bind to driver %s\n",
2012 udc_controller->gadget.name, driver->driver.name);
2013
2014out:
2015 if (retval)
2016 printk(KERN_WARNING "gadget driver register failed %d\n",
2017 retval);
2018 return retval;
2019}
2020
2021/* Disconnect from gadget driver */
2022static int fsl_stop(struct usb_gadget_driver *driver)
2023{
2024 struct fsl_ep *loop_ep;
2025 unsigned long flags;
2026
2027 if (!udc_controller)
2028 return -ENODEV;
2029
2030 if (!driver || driver != udc_controller->driver || !driver->unbind)
2031 return -EINVAL;
2032
2033 if (udc_controller->transceiver)
2034 otg_set_peripheral(udc_controller->transceiver->otg, NULL);
2035
2036 /* stop DR, disable intr */
2037 dr_controller_stop(udc_controller);
2038
2039 /* in fact, no needed */
2040 udc_controller->usb_state = USB_STATE_ATTACHED;
2041 udc_controller->ep0_state = WAIT_FOR_SETUP;
2042 udc_controller->ep0_dir = 0;
2043
2044 /* stand operation */
2045 spin_lock_irqsave(&udc_controller->lock, flags);
2046 udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2047 nuke(&udc_controller->eps[0], -ESHUTDOWN);
2048 list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
2049 ep.ep_list)
2050 nuke(loop_ep, -ESHUTDOWN);
2051 spin_unlock_irqrestore(&udc_controller->lock, flags);
2052
2053 /* report disconnect; the controller is already quiesced */
2054 driver->disconnect(&udc_controller->gadget);
2055
2056 /* unbind gadget and unhook driver. */
2057 driver->unbind(&udc_controller->gadget);
2058 udc_controller->gadget.dev.driver = NULL;
2059 udc_controller->driver = NULL;
2060
2061 printk(KERN_WARNING "unregistered gadget driver '%s'\n",
2062 driver->driver.name);
2063 return 0;
2064}
2065
2066/*-------------------------------------------------------------------------
2067 PROC File System Support
2068-------------------------------------------------------------------------*/
2069#ifdef CONFIG_USB_GADGET_DEBUG_FILES
2070
2071#include <linux/seq_file.h>
2072
2073static const char proc_filename[] = "driver/fsl_usb2_udc";
2074
2075static int fsl_proc_read(char *page, char **start, off_t off, int count,
2076 int *eof, void *_dev)
2077{
2078 char *buf = page;
2079 char *next = buf;
2080 unsigned size = count;
2081 unsigned long flags;
2082 int t, i;
2083 u32 tmp_reg;
2084 struct fsl_ep *ep = NULL;
2085 struct fsl_req *req;
2086
2087 struct fsl_udc *udc = udc_controller;
2088 if (off != 0)
2089 return 0;
2090
2091 spin_lock_irqsave(&udc->lock, flags);
2092
2093 /* ------basic driver information ---- */
2094 t = scnprintf(next, size,
2095 DRIVER_DESC "\n"
2096 "%s version: %s\n"
2097 "Gadget driver: %s\n\n",
2098 driver_name, DRIVER_VERSION,
2099 udc->driver ? udc->driver->driver.name : "(none)");
2100 size -= t;
2101 next += t;
2102
2103 /* ------ DR Registers ----- */
2104 tmp_reg = fsl_readl(&dr_regs->usbcmd);
2105 t = scnprintf(next, size,
2106 "USBCMD reg:\n"
2107 "SetupTW: %d\n"
2108 "Run/Stop: %s\n\n",
2109 (tmp_reg & USB_CMD_SUTW) ? 1 : 0,
2110 (tmp_reg & USB_CMD_RUN_STOP) ? "Run" : "Stop");
2111 size -= t;
2112 next += t;
2113
2114 tmp_reg = fsl_readl(&dr_regs->usbsts);
2115 t = scnprintf(next, size,
2116 "USB Status Reg:\n"
2117 "Dr Suspend: %d Reset Received: %d System Error: %s "
2118 "USB Error Interrupt: %s\n\n",
2119 (tmp_reg & USB_STS_SUSPEND) ? 1 : 0,
2120 (tmp_reg & USB_STS_RESET) ? 1 : 0,
2121 (tmp_reg & USB_STS_SYS_ERR) ? "Err" : "Normal",
2122 (tmp_reg & USB_STS_ERR) ? "Err detected" : "No err");
2123 size -= t;
2124 next += t;
2125
2126 tmp_reg = fsl_readl(&dr_regs->usbintr);
2127 t = scnprintf(next, size,
2128 "USB Intrrupt Enable Reg:\n"
2129 "Sleep Enable: %d SOF Received Enable: %d "
2130 "Reset Enable: %d\n"
2131 "System Error Enable: %d "
2132 "Port Change Dectected Enable: %d\n"
2133 "USB Error Intr Enable: %d USB Intr Enable: %d\n\n",
2134 (tmp_reg & USB_INTR_DEVICE_SUSPEND) ? 1 : 0,
2135 (tmp_reg & USB_INTR_SOF_EN) ? 1 : 0,
2136 (tmp_reg & USB_INTR_RESET_EN) ? 1 : 0,
2137 (tmp_reg & USB_INTR_SYS_ERR_EN) ? 1 : 0,
2138 (tmp_reg & USB_INTR_PTC_DETECT_EN) ? 1 : 0,
2139 (tmp_reg & USB_INTR_ERR_INT_EN) ? 1 : 0,
2140 (tmp_reg & USB_INTR_INT_EN) ? 1 : 0);
2141 size -= t;
2142 next += t;
2143
2144 tmp_reg = fsl_readl(&dr_regs->frindex);
2145 t = scnprintf(next, size,
2146 "USB Frame Index Reg: Frame Number is 0x%x\n\n",
2147 (tmp_reg & USB_FRINDEX_MASKS));
2148 size -= t;
2149 next += t;
2150
2151 tmp_reg = fsl_readl(&dr_regs->deviceaddr);
2152 t = scnprintf(next, size,
2153 "USB Device Address Reg: Device Addr is 0x%x\n\n",
2154 (tmp_reg & USB_DEVICE_ADDRESS_MASK));
2155 size -= t;
2156 next += t;
2157
2158 tmp_reg = fsl_readl(&dr_regs->endpointlistaddr);
2159 t = scnprintf(next, size,
2160 "USB Endpoint List Address Reg: "
2161 "Device Addr is 0x%x\n\n",
2162 (tmp_reg & USB_EP_LIST_ADDRESS_MASK));
2163 size -= t;
2164 next += t;
2165
2166 tmp_reg = fsl_readl(&dr_regs->portsc1);
2167 t = scnprintf(next, size,
2168 "USB Port Status&Control Reg:\n"
2169 "Port Transceiver Type : %s Port Speed: %s\n"
2170 "PHY Low Power Suspend: %s Port Reset: %s "
2171 "Port Suspend Mode: %s\n"
2172 "Over-current Change: %s "
2173 "Port Enable/Disable Change: %s\n"
2174 "Port Enabled/Disabled: %s "
2175 "Current Connect Status: %s\n\n", ( {
2176 char *s;
2177 switch (tmp_reg & PORTSCX_PTS_FSLS) {
2178 case PORTSCX_PTS_UTMI:
2179 s = "UTMI"; break;
2180 case PORTSCX_PTS_ULPI:
2181 s = "ULPI "; break;
2182 case PORTSCX_PTS_FSLS:
2183 s = "FS/LS Serial"; break;
2184 default:
2185 s = "None"; break;
2186 }
2187 s;} ),
2188 usb_speed_string(portscx_device_speed(tmp_reg)),
2189 (tmp_reg & PORTSCX_PHY_LOW_POWER_SPD) ?
2190 "Normal PHY mode" : "Low power mode",
2191 (tmp_reg & PORTSCX_PORT_RESET) ? "In Reset" :
2192 "Not in Reset",
2193 (tmp_reg & PORTSCX_PORT_SUSPEND) ? "In " : "Not in",
2194 (tmp_reg & PORTSCX_OVER_CURRENT_CHG) ? "Dected" :
2195 "No",
2196 (tmp_reg & PORTSCX_PORT_EN_DIS_CHANGE) ? "Disable" :
2197 "Not change",
2198 (tmp_reg & PORTSCX_PORT_ENABLE) ? "Enable" :
2199 "Not correct",
2200 (tmp_reg & PORTSCX_CURRENT_CONNECT_STATUS) ?
2201 "Attached" : "Not-Att");
2202 size -= t;
2203 next += t;
2204
2205 tmp_reg = fsl_readl(&dr_regs->usbmode);
2206 t = scnprintf(next, size,
2207 "USB Mode Reg: Controller Mode is: %s\n\n", ( {
2208 char *s;
2209 switch (tmp_reg & USB_MODE_CTRL_MODE_HOST) {
2210 case USB_MODE_CTRL_MODE_IDLE:
2211 s = "Idle"; break;
2212 case USB_MODE_CTRL_MODE_DEVICE:
2213 s = "Device Controller"; break;
2214 case USB_MODE_CTRL_MODE_HOST:
2215 s = "Host Controller"; break;
2216 default:
2217 s = "None"; break;
2218 }
2219 s;
2220 } ));
2221 size -= t;
2222 next += t;
2223
2224 tmp_reg = fsl_readl(&dr_regs->endptsetupstat);
2225 t = scnprintf(next, size,
2226 "Endpoint Setup Status Reg: SETUP on ep 0x%x\n\n",
2227 (tmp_reg & EP_SETUP_STATUS_MASK));
2228 size -= t;
2229 next += t;
2230
2231 for (i = 0; i < udc->max_ep / 2; i++) {
2232 tmp_reg = fsl_readl(&dr_regs->endptctrl[i]);
2233 t = scnprintf(next, size, "EP Ctrl Reg [0x%x]: = [0x%x]\n",
2234 i, tmp_reg);
2235 size -= t;
2236 next += t;
2237 }
2238 tmp_reg = fsl_readl(&dr_regs->endpointprime);
2239 t = scnprintf(next, size, "EP Prime Reg = [0x%x]\n\n", tmp_reg);
2240 size -= t;
2241 next += t;
2242
2243#ifndef CONFIG_ARCH_MXC
2244 if (udc->pdata->have_sysif_regs) {
2245 tmp_reg = usb_sys_regs->snoop1;
2246 t = scnprintf(next, size, "Snoop1 Reg : = [0x%x]\n\n", tmp_reg);
2247 size -= t;
2248 next += t;
2249
2250 tmp_reg = usb_sys_regs->control;
2251 t = scnprintf(next, size, "General Control Reg : = [0x%x]\n\n",
2252 tmp_reg);
2253 size -= t;
2254 next += t;
2255 }
2256#endif
2257
2258 /* ------fsl_udc, fsl_ep, fsl_request structure information ----- */
2259 ep = &udc->eps[0];
2260 t = scnprintf(next, size, "For %s Maxpkt is 0x%x index is 0x%x\n",
2261 ep->ep.name, ep_maxpacket(ep), ep_index(ep));
2262 size -= t;
2263 next += t;
2264
2265 if (list_empty(&ep->queue)) {
2266 t = scnprintf(next, size, "its req queue is empty\n\n");
2267 size -= t;
2268 next += t;
2269 } else {
2270 list_for_each_entry(req, &ep->queue, queue) {
2271 t = scnprintf(next, size,
2272 "req %p actual 0x%x length 0x%x buf %p\n",
2273 &req->req, req->req.actual,
2274 req->req.length, req->req.buf);
2275 size -= t;
2276 next += t;
2277 }
2278 }
2279 /* other gadget->eplist ep */
2280 list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
2281 if (ep->ep.desc) {
2282 t = scnprintf(next, size,
2283 "\nFor %s Maxpkt is 0x%x "
2284 "index is 0x%x\n",
2285 ep->ep.name, ep_maxpacket(ep),
2286 ep_index(ep));
2287 size -= t;
2288 next += t;
2289
2290 if (list_empty(&ep->queue)) {
2291 t = scnprintf(next, size,
2292 "its req queue is empty\n\n");
2293 size -= t;
2294 next += t;
2295 } else {
2296 list_for_each_entry(req, &ep->queue, queue) {
2297 t = scnprintf(next, size,
2298 "req %p actual 0x%x length "
2299 "0x%x buf %p\n",
2300 &req->req, req->req.actual,
2301 req->req.length, req->req.buf);
2302 size -= t;
2303 next += t;
2304 } /* end for each_entry of ep req */
2305 } /* end for else */
2306 } /* end for if(ep->queue) */
2307 } /* end (ep->desc) */
2308
2309 spin_unlock_irqrestore(&udc->lock, flags);
2310
2311 *eof = 1;
2312 return count - size;
2313}
2314
2315#define create_proc_file() create_proc_read_entry(proc_filename, \
2316 0, NULL, fsl_proc_read, NULL)
2317
2318#define remove_proc_file() remove_proc_entry(proc_filename, NULL)
2319
2320#else /* !CONFIG_USB_GADGET_DEBUG_FILES */
2321
2322#define create_proc_file() do {} while (0)
2323#define remove_proc_file() do {} while (0)
2324
2325#endif /* CONFIG_USB_GADGET_DEBUG_FILES */
2326
2327/*-------------------------------------------------------------------------*/
2328
2329/* Release udc structures */
2330static void fsl_udc_release(struct device *dev)
2331{
2332 complete(udc_controller->done);
2333 dma_free_coherent(dev->parent, udc_controller->ep_qh_size,
2334 udc_controller->ep_qh, udc_controller->ep_qh_dma);
2335 kfree(udc_controller);
2336}
2337
2338/******************************************************************
2339 Internal structure setup functions
2340*******************************************************************/
2341/*------------------------------------------------------------------
2342 * init resource for globle controller
2343 * Return the udc handle on success or NULL on failure
2344 ------------------------------------------------------------------*/
2345static int __init struct_udc_setup(struct fsl_udc *udc,
2346 struct platform_device *pdev)
2347{
2348 struct fsl_usb2_platform_data *pdata;
2349 size_t size;
2350
2351 pdata = pdev->dev.platform_data;
2352 udc->phy_mode = pdata->phy_mode;
2353
2354 udc->eps = kzalloc(sizeof(struct fsl_ep) * udc->max_ep, GFP_KERNEL);
2355 if (!udc->eps) {
2356 ERR("malloc fsl_ep failed\n");
2357 return -1;
2358 }
2359
2360 /* initialized QHs, take care of alignment */
2361 size = udc->max_ep * sizeof(struct ep_queue_head);
2362 if (size < QH_ALIGNMENT)
2363 size = QH_ALIGNMENT;
2364 else if ((size % QH_ALIGNMENT) != 0) {
2365 size += QH_ALIGNMENT + 1;
2366 size &= ~(QH_ALIGNMENT - 1);
2367 }
2368 udc->ep_qh = dma_alloc_coherent(&pdev->dev, size,
2369 &udc->ep_qh_dma, GFP_KERNEL);
2370 if (!udc->ep_qh) {
2371 ERR("malloc QHs for udc failed\n");
2372 kfree(udc->eps);
2373 return -1;
2374 }
2375
2376 udc->ep_qh_size = size;
2377
2378 /* Initialize ep0 status request structure */
2379 /* FIXME: fsl_alloc_request() ignores ep argument */
2380 udc->status_req = container_of(fsl_alloc_request(NULL, GFP_KERNEL),
2381 struct fsl_req, req);
2382 /* allocate a small amount of memory to get valid address */
2383 udc->status_req->req.buf = kmalloc(8, GFP_KERNEL);
2384
2385 udc->resume_state = USB_STATE_NOTATTACHED;
2386 udc->usb_state = USB_STATE_POWERED;
2387 udc->ep0_dir = 0;
2388 udc->remote_wakeup = 0; /* default to 0 on reset */
2389
2390 return 0;
2391}
2392
2393/*----------------------------------------------------------------
2394 * Setup the fsl_ep struct for eps
2395 * Link fsl_ep->ep to gadget->ep_list
2396 * ep0out is not used so do nothing here
2397 * ep0in should be taken care
2398 *--------------------------------------------------------------*/
2399static int __init struct_ep_setup(struct fsl_udc *udc, unsigned char index,
2400 char *name, int link)
2401{
2402 struct fsl_ep *ep = &udc->eps[index];
2403
2404 ep->udc = udc;
2405 strcpy(ep->name, name);
2406 ep->ep.name = ep->name;
2407
2408 ep->ep.ops = &fsl_ep_ops;
2409 ep->stopped = 0;
2410
2411 /* for ep0: maxP defined in desc
2412 * for other eps, maxP is set by epautoconfig() called by gadget layer
2413 */
2414 ep->ep.maxpacket = (unsigned short) ~0;
2415
2416 /* the queue lists any req for this ep */
2417 INIT_LIST_HEAD(&ep->queue);
2418
2419 /* gagdet.ep_list used for ep_autoconfig so no ep0 */
2420 if (link)
2421 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2422 ep->gadget = &udc->gadget;
2423 ep->qh = &udc->ep_qh[index];
2424
2425 return 0;
2426}
2427
2428/* Driver probe function
2429 * all intialization operations implemented here except enabling usb_intr reg
2430 * board setup should have been done in the platform code
2431 */
2432static int __init fsl_udc_probe(struct platform_device *pdev)
2433{
2434 struct fsl_usb2_platform_data *pdata;
2435 struct resource *res;
2436 int ret = -ENODEV;
2437 unsigned int i;
2438 u32 dccparams;
2439
2440 if (strcmp(pdev->name, driver_name)) {
2441 VDBG("Wrong device");
2442 return -ENODEV;
2443 }
2444
2445 udc_controller = kzalloc(sizeof(struct fsl_udc), GFP_KERNEL);
2446 if (udc_controller == NULL) {
2447 ERR("malloc udc failed\n");
2448 return -ENOMEM;
2449 }
2450
2451 pdata = pdev->dev.platform_data;
2452 udc_controller->pdata = pdata;
2453 spin_lock_init(&udc_controller->lock);
2454 udc_controller->stopped = 1;
2455
2456#ifdef CONFIG_USB_OTG
2457 if (pdata->operating_mode == FSL_USB2_DR_OTG) {
2458 udc_controller->transceiver = usb_get_transceiver();
2459 if (!udc_controller->transceiver) {
2460 ERR("Can't find OTG driver!\n");
2461 ret = -ENODEV;
2462 goto err_kfree;
2463 }
2464 }
2465#endif
2466
2467 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2468 if (!res) {
2469 ret = -ENXIO;
2470 goto err_kfree;
2471 }
2472
2473 if (pdata->operating_mode == FSL_USB2_DR_DEVICE) {
2474 if (!request_mem_region(res->start, resource_size(res),
2475 driver_name)) {
2476 ERR("request mem region for %s failed\n", pdev->name);
2477 ret = -EBUSY;
2478 goto err_kfree;
2479 }
2480 }
2481
2482 dr_regs = ioremap(res->start, resource_size(res));
2483 if (!dr_regs) {
2484 ret = -ENOMEM;
2485 goto err_release_mem_region;
2486 }
2487
2488 pdata->regs = (void *)dr_regs;
2489
2490 /*
2491 * do platform specific init: check the clock, grab/config pins, etc.
2492 */
2493 if (pdata->init && pdata->init(pdev)) {
2494 ret = -ENODEV;
2495 goto err_iounmap_noclk;
2496 }
2497
2498 /* Set accessors only after pdata->init() ! */
2499 fsl_set_accessors(pdata);
2500
2501#ifndef CONFIG_ARCH_MXC
2502 if (pdata->have_sysif_regs)
2503 usb_sys_regs = (void *)dr_regs + USB_DR_SYS_OFFSET;
2504#endif
2505
2506 /* Initialize USB clocks */
2507 ret = fsl_udc_clk_init(pdev);
2508 if (ret < 0)
2509 goto err_iounmap_noclk;
2510
2511 /* Read Device Controller Capability Parameters register */
2512 dccparams = fsl_readl(&dr_regs->dccparams);
2513 if (!(dccparams & DCCPARAMS_DC)) {
2514 ERR("This SOC doesn't support device role\n");
2515 ret = -ENODEV;
2516 goto err_iounmap;
2517 }
2518 /* Get max device endpoints */
2519 /* DEN is bidirectional ep number, max_ep doubles the number */
2520 udc_controller->max_ep = (dccparams & DCCPARAMS_DEN_MASK) * 2;
2521
2522 udc_controller->irq = platform_get_irq(pdev, 0);
2523 if (!udc_controller->irq) {
2524 ret = -ENODEV;
2525 goto err_iounmap;
2526 }
2527
2528 ret = request_irq(udc_controller->irq, fsl_udc_irq, IRQF_SHARED,
2529 driver_name, udc_controller);
2530 if (ret != 0) {
2531 ERR("cannot request irq %d err %d\n",
2532 udc_controller->irq, ret);
2533 goto err_iounmap;
2534 }
2535
2536 /* Initialize the udc structure including QH member and other member */
2537 if (struct_udc_setup(udc_controller, pdev)) {
2538 ERR("Can't initialize udc data structure\n");
2539 ret = -ENOMEM;
2540 goto err_free_irq;
2541 }
2542
2543 if (!udc_controller->transceiver) {
2544 /* initialize usb hw reg except for regs for EP,
2545 * leave usbintr reg untouched */
2546 dr_controller_setup(udc_controller);
2547 }
2548
2549 fsl_udc_clk_finalize(pdev);
2550
2551 /* Setup gadget structure */
2552 udc_controller->gadget.ops = &fsl_gadget_ops;
2553 udc_controller->gadget.max_speed = USB_SPEED_HIGH;
2554 udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
2555 INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
2556 udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2557 udc_controller->gadget.name = driver_name;
2558
2559 /* Setup gadget.dev and register with kernel */
2560 dev_set_name(&udc_controller->gadget.dev, "gadget");
2561 udc_controller->gadget.dev.release = fsl_udc_release;
2562 udc_controller->gadget.dev.parent = &pdev->dev;
2563 ret = device_register(&udc_controller->gadget.dev);
2564 if (ret < 0)
2565 goto err_free_irq;
2566
2567 if (udc_controller->transceiver)
2568 udc_controller->gadget.is_otg = 1;
2569
2570 /* setup QH and epctrl for ep0 */
2571 ep0_setup(udc_controller);
2572
2573 /* setup udc->eps[] for ep0 */
2574 struct_ep_setup(udc_controller, 0, "ep0", 0);
2575 /* for ep0: the desc defined here;
2576 * for other eps, gadget layer called ep_enable with defined desc
2577 */
2578 udc_controller->eps[0].ep.desc = &fsl_ep0_desc;
2579 udc_controller->eps[0].ep.maxpacket = USB_MAX_CTRL_PAYLOAD;
2580
2581 /* setup the udc->eps[] for non-control endpoints and link
2582 * to gadget.ep_list */
2583 for (i = 1; i < (int)(udc_controller->max_ep / 2); i++) {
2584 char name[14];
2585
2586 sprintf(name, "ep%dout", i);
2587 struct_ep_setup(udc_controller, i * 2, name, 1);
2588 sprintf(name, "ep%din", i);
2589 struct_ep_setup(udc_controller, i * 2 + 1, name, 1);
2590 }
2591
2592 /* use dma_pool for TD management */
2593 udc_controller->td_pool = dma_pool_create("udc_td", &pdev->dev,
2594 sizeof(struct ep_td_struct),
2595 DTD_ALIGNMENT, UDC_DMA_BOUNDARY);
2596 if (udc_controller->td_pool == NULL) {
2597 ret = -ENOMEM;
2598 goto err_unregister;
2599 }
2600
2601 ret = usb_add_gadget_udc(&pdev->dev, &udc_controller->gadget);
2602 if (ret)
2603 goto err_del_udc;
2604
2605 create_proc_file();
2606 return 0;
2607
2608err_del_udc:
2609 dma_pool_destroy(udc_controller->td_pool);
2610err_unregister:
2611 device_unregister(&udc_controller->gadget.dev);
2612err_free_irq:
2613 free_irq(udc_controller->irq, udc_controller);
2614err_iounmap:
2615 if (pdata->exit)
2616 pdata->exit(pdev);
2617 fsl_udc_clk_release();
2618err_iounmap_noclk:
2619 iounmap(dr_regs);
2620err_release_mem_region:
2621 if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
2622 release_mem_region(res->start, resource_size(res));
2623err_kfree:
2624 kfree(udc_controller);
2625 udc_controller = NULL;
2626 return ret;
2627}
2628
2629/* Driver removal function
2630 * Free resources and finish pending transactions
2631 */
2632static int __exit fsl_udc_remove(struct platform_device *pdev)
2633{
2634 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2635 struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
2636
2637 DECLARE_COMPLETION(done);
2638
2639 if (!udc_controller)
2640 return -ENODEV;
2641
2642 usb_del_gadget_udc(&udc_controller->gadget);
2643 udc_controller->done = &done;
2644
2645 fsl_udc_clk_release();
2646
2647 /* DR has been stopped in usb_gadget_unregister_driver() */
2648 remove_proc_file();
2649
2650 /* Free allocated memory */
2651 kfree(udc_controller->status_req->req.buf);
2652 kfree(udc_controller->status_req);
2653 kfree(udc_controller->eps);
2654
2655 dma_pool_destroy(udc_controller->td_pool);
2656 free_irq(udc_controller->irq, udc_controller);
2657 iounmap(dr_regs);
2658 if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
2659 release_mem_region(res->start, resource_size(res));
2660
2661 device_unregister(&udc_controller->gadget.dev);
2662 /* free udc --wait for the release() finished */
2663 wait_for_completion(&done);
2664
2665 /*
2666 * do platform specific un-initialization:
2667 * release iomux pins, etc.
2668 */
2669 if (pdata->exit)
2670 pdata->exit(pdev);
2671
2672 return 0;
2673}
2674
2675/*-----------------------------------------------------------------
2676 * Modify Power management attributes
2677 * Used by OTG statemachine to disable gadget temporarily
2678 -----------------------------------------------------------------*/
2679static int fsl_udc_suspend(struct platform_device *pdev, pm_message_t state)
2680{
2681 dr_controller_stop(udc_controller);
2682 return 0;
2683}
2684
2685/*-----------------------------------------------------------------
2686 * Invoked on USB resume. May be called in_interrupt.
2687 * Here we start the DR controller and enable the irq
2688 *-----------------------------------------------------------------*/
2689static int fsl_udc_resume(struct platform_device *pdev)
2690{
2691 /* Enable DR irq reg and set controller Run */
2692 if (udc_controller->stopped) {
2693 dr_controller_setup(udc_controller);
2694 dr_controller_run(udc_controller);
2695 }
2696 udc_controller->usb_state = USB_STATE_ATTACHED;
2697 udc_controller->ep0_state = WAIT_FOR_SETUP;
2698 udc_controller->ep0_dir = 0;
2699 return 0;
2700}
2701
2702static int fsl_udc_otg_suspend(struct device *dev, pm_message_t state)
2703{
2704 struct fsl_udc *udc = udc_controller;
2705 u32 mode, usbcmd;
2706
2707 mode = fsl_readl(&dr_regs->usbmode) & USB_MODE_CTRL_MODE_MASK;
2708
2709 pr_debug("%s(): mode 0x%x stopped %d\n", __func__, mode, udc->stopped);
2710
2711 /*
2712 * If the controller is already stopped, then this must be a
2713 * PM suspend. Remember this fact, so that we will leave the
2714 * controller stopped at PM resume time.
2715 */
2716 if (udc->stopped) {
2717 pr_debug("gadget already stopped, leaving early\n");
2718 udc->already_stopped = 1;
2719 return 0;
2720 }
2721
2722 if (mode != USB_MODE_CTRL_MODE_DEVICE) {
2723 pr_debug("gadget not in device mode, leaving early\n");
2724 return 0;
2725 }
2726
2727 /* stop the controller */
2728 usbcmd = fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP;
2729 fsl_writel(usbcmd, &dr_regs->usbcmd);
2730
2731 udc->stopped = 1;
2732
2733 pr_info("USB Gadget suspended\n");
2734
2735 return 0;
2736}
2737
2738static int fsl_udc_otg_resume(struct device *dev)
2739{
2740 pr_debug("%s(): stopped %d already_stopped %d\n", __func__,
2741 udc_controller->stopped, udc_controller->already_stopped);
2742
2743 /*
2744 * If the controller was stopped at suspend time, then
2745 * don't resume it now.
2746 */
2747 if (udc_controller->already_stopped) {
2748 udc_controller->already_stopped = 0;
2749 pr_debug("gadget was already stopped, leaving early\n");
2750 return 0;
2751 }
2752
2753 pr_info("USB Gadget resume\n");
2754
2755 return fsl_udc_resume(NULL);
2756}
2757
2758/*-------------------------------------------------------------------------
2759 Register entry point for the peripheral controller driver
2760--------------------------------------------------------------------------*/
2761
2762static struct platform_driver udc_driver = {
2763 .remove = __exit_p(fsl_udc_remove),
2764 /* these suspend and resume are not usb suspend and resume */
2765 .suspend = fsl_udc_suspend,
2766 .resume = fsl_udc_resume,
2767 .driver = {
2768 .name = (char *)driver_name,
2769 .owner = THIS_MODULE,
2770 /* udc suspend/resume called from OTG driver */
2771 .suspend = fsl_udc_otg_suspend,
2772 .resume = fsl_udc_otg_resume,
2773 },
2774};
2775
2776static int __init udc_init(void)
2777{
2778 printk(KERN_INFO "%s (%s)\n", driver_desc, DRIVER_VERSION);
2779 return platform_driver_probe(&udc_driver, fsl_udc_probe);
2780}
2781
2782module_init(udc_init);
2783
2784static void __exit udc_exit(void)
2785{
2786 platform_driver_unregister(&udc_driver);
2787 printk(KERN_WARNING "%s unregistered\n", driver_desc);
2788}
2789
2790module_exit(udc_exit);
2791
2792MODULE_DESCRIPTION(DRIVER_DESC);
2793MODULE_AUTHOR(DRIVER_AUTHOR);
2794MODULE_LICENSE("GPL");
2795MODULE_ALIAS("platform:fsl-usb2-udc");