Merge branches 'arm/rockchip', 'arm/exynos', 'arm/smmu', 'x86/vt-d', 'x86/amd', ...
[sfrench/cifs-2.6.git] / drivers / usb / gadget / udc / fsl_udc_core.c
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/err.h>
28 #include <linux/slab.h>
29 #include <linux/init.h>
30 #include <linux/list.h>
31 #include <linux/interrupt.h>
32 #include <linux/proc_fs.h>
33 #include <linux/mm.h>
34 #include <linux/moduleparam.h>
35 #include <linux/device.h>
36 #include <linux/usb/ch9.h>
37 #include <linux/usb/gadget.h>
38 #include <linux/usb/otg.h>
39 #include <linux/dma-mapping.h>
40 #include <linux/platform_device.h>
41 #include <linux/fsl_devices.h>
42 #include <linux/dmapool.h>
43 #include <linux/delay.h>
44 #include <linux/of_device.h>
45
46 #include <asm/byteorder.h>
47 #include <asm/io.h>
48 #include <asm/unaligned.h>
49 #include <asm/dma.h>
50
51 #include "fsl_usb2_udc.h"
52
53 #define DRIVER_DESC     "Freescale High-Speed USB SOC Device Controller driver"
54 #define DRIVER_AUTHOR   "Li Yang/Jiang Bo"
55 #define DRIVER_VERSION  "Apr 20, 2007"
56
57 #define DMA_ADDR_INVALID        (~(dma_addr_t)0)
58
59 static const char driver_name[] = "fsl-usb2-udc";
60 static const char driver_desc[] = DRIVER_DESC;
61
62 static struct usb_dr_device __iomem *dr_regs;
63
64 static struct usb_sys_interface __iomem *usb_sys_regs;
65
66 /* it is initialized in probe()  */
67 static struct fsl_udc *udc_controller = NULL;
68
69 static const struct usb_endpoint_descriptor
70 fsl_ep0_desc = {
71         .bLength =              USB_DT_ENDPOINT_SIZE,
72         .bDescriptorType =      USB_DT_ENDPOINT,
73         .bEndpointAddress =     0,
74         .bmAttributes =         USB_ENDPOINT_XFER_CONTROL,
75         .wMaxPacketSize =       USB_MAX_CTRL_PAYLOAD,
76 };
77
78 static void fsl_ep_fifo_flush(struct usb_ep *_ep);
79
80 #ifdef CONFIG_PPC32
81 /*
82  * On some SoCs, the USB controller registers can be big or little endian,
83  * depending on the version of the chip. In order to be able to run the
84  * same kernel binary on 2 different versions of an SoC, the BE/LE decision
85  * must be made at run time. _fsl_readl and fsl_writel are pointers to the
86  * BE or LE readl() and writel() functions, and fsl_readl() and fsl_writel()
87  * call through those pointers. Platform code for SoCs that have BE USB
88  * registers should set pdata->big_endian_mmio flag.
89  *
90  * This also applies to controller-to-cpu accessors for the USB descriptors,
91  * since their endianness is also SoC dependant. Platform code for SoCs that
92  * have BE USB descriptors should set pdata->big_endian_desc flag.
93  */
94 static u32 _fsl_readl_be(const unsigned __iomem *p)
95 {
96         return in_be32(p);
97 }
98
99 static u32 _fsl_readl_le(const unsigned __iomem *p)
100 {
101         return in_le32(p);
102 }
103
104 static void _fsl_writel_be(u32 v, unsigned __iomem *p)
105 {
106         out_be32(p, v);
107 }
108
109 static void _fsl_writel_le(u32 v, unsigned __iomem *p)
110 {
111         out_le32(p, v);
112 }
113
114 static u32 (*_fsl_readl)(const unsigned __iomem *p);
115 static void (*_fsl_writel)(u32 v, unsigned __iomem *p);
116
117 #define fsl_readl(p)            (*_fsl_readl)((p))
118 #define fsl_writel(v, p)        (*_fsl_writel)((v), (p))
119
120 static inline void fsl_set_accessors(struct fsl_usb2_platform_data *pdata)
121 {
122         if (pdata->big_endian_mmio) {
123                 _fsl_readl = _fsl_readl_be;
124                 _fsl_writel = _fsl_writel_be;
125         } else {
126                 _fsl_readl = _fsl_readl_le;
127                 _fsl_writel = _fsl_writel_le;
128         }
129 }
130
131 static inline u32 cpu_to_hc32(const u32 x)
132 {
133         return udc_controller->pdata->big_endian_desc
134                 ? (__force u32)cpu_to_be32(x)
135                 : (__force u32)cpu_to_le32(x);
136 }
137
138 static inline u32 hc32_to_cpu(const u32 x)
139 {
140         return udc_controller->pdata->big_endian_desc
141                 ? be32_to_cpu((__force __be32)x)
142                 : le32_to_cpu((__force __le32)x);
143 }
144 #else /* !CONFIG_PPC32 */
145 static inline void fsl_set_accessors(struct fsl_usb2_platform_data *pdata) {}
146
147 #define fsl_readl(addr)         readl(addr)
148 #define fsl_writel(val32, addr) writel(val32, addr)
149 #define cpu_to_hc32(x)          cpu_to_le32(x)
150 #define hc32_to_cpu(x)          le32_to_cpu(x)
151 #endif /* CONFIG_PPC32 */
152
153 /********************************************************************
154  *      Internal Used Function
155 ********************************************************************/
156 /*-----------------------------------------------------------------
157  * done() - retire a request; caller blocked irqs
158  * @status : request status to be set, only works when
159  *      request is still in progress.
160  *--------------------------------------------------------------*/
161 static void done(struct fsl_ep *ep, struct fsl_req *req, int status)
162 __releases(ep->udc->lock)
163 __acquires(ep->udc->lock)
164 {
165         struct fsl_udc *udc = NULL;
166         unsigned char stopped = ep->stopped;
167         struct ep_td_struct *curr_td, *next_td;
168         int j;
169
170         udc = (struct fsl_udc *)ep->udc;
171         /* Removed the req from fsl_ep->queue */
172         list_del_init(&req->queue);
173
174         /* req.status should be set as -EINPROGRESS in ep_queue() */
175         if (req->req.status == -EINPROGRESS)
176                 req->req.status = status;
177         else
178                 status = req->req.status;
179
180         /* Free dtd for the request */
181         next_td = req->head;
182         for (j = 0; j < req->dtd_count; j++) {
183                 curr_td = next_td;
184                 if (j != req->dtd_count - 1) {
185                         next_td = curr_td->next_td_virt;
186                 }
187                 dma_pool_free(udc->td_pool, curr_td, curr_td->td_dma);
188         }
189
190         usb_gadget_unmap_request(&ep->udc->gadget, &req->req, ep_is_in(ep));
191
192         if (status && (status != -ESHUTDOWN))
193                 VDBG("complete %s req %p stat %d len %u/%u",
194                         ep->ep.name, &req->req, status,
195                         req->req.actual, req->req.length);
196
197         ep->stopped = 1;
198
199         spin_unlock(&ep->udc->lock);
200
201         usb_gadget_giveback_request(&ep->ep, &req->req);
202
203         spin_lock(&ep->udc->lock);
204         ep->stopped = stopped;
205 }
206
207 /*-----------------------------------------------------------------
208  * nuke(): delete all requests related to this ep
209  * called with spinlock held
210  *--------------------------------------------------------------*/
211 static void nuke(struct fsl_ep *ep, int status)
212 {
213         ep->stopped = 1;
214
215         /* Flush fifo */
216         fsl_ep_fifo_flush(&ep->ep);
217
218         /* Whether this eq has request linked */
219         while (!list_empty(&ep->queue)) {
220                 struct fsl_req *req = NULL;
221
222                 req = list_entry(ep->queue.next, struct fsl_req, queue);
223                 done(ep, req, status);
224         }
225 }
226
227 /*------------------------------------------------------------------
228         Internal Hardware related function
229  ------------------------------------------------------------------*/
230
231 static int dr_controller_setup(struct fsl_udc *udc)
232 {
233         unsigned int tmp, portctrl, ep_num;
234         unsigned int max_no_of_ep;
235         unsigned int ctrl;
236         unsigned long timeout;
237
238 #define FSL_UDC_RESET_TIMEOUT 1000
239
240         /* Config PHY interface */
241         portctrl = fsl_readl(&dr_regs->portsc1);
242         portctrl &= ~(PORTSCX_PHY_TYPE_SEL | PORTSCX_PORT_WIDTH);
243         switch (udc->phy_mode) {
244         case FSL_USB2_PHY_ULPI:
245                 if (udc->pdata->have_sysif_regs) {
246                         if (udc->pdata->controller_ver) {
247                                 /* controller version 1.6 or above */
248                                 ctrl = __raw_readl(&usb_sys_regs->control);
249                                 ctrl &= ~USB_CTRL_UTMI_PHY_EN;
250                                 ctrl |= USB_CTRL_USB_EN;
251                                 __raw_writel(ctrl, &usb_sys_regs->control);
252                         }
253                 }
254                 portctrl |= PORTSCX_PTS_ULPI;
255                 break;
256         case FSL_USB2_PHY_UTMI_WIDE:
257                 portctrl |= PORTSCX_PTW_16BIT;
258                 /* fall through */
259         case FSL_USB2_PHY_UTMI:
260                 if (udc->pdata->have_sysif_regs) {
261                         if (udc->pdata->controller_ver) {
262                                 /* controller version 1.6 or above */
263                                 ctrl = __raw_readl(&usb_sys_regs->control);
264                                 ctrl |= (USB_CTRL_UTMI_PHY_EN |
265                                         USB_CTRL_USB_EN);
266                                 __raw_writel(ctrl, &usb_sys_regs->control);
267                                 mdelay(FSL_UTMI_PHY_DLY); /* Delay for UTMI
268                                         PHY CLK to become stable - 10ms*/
269                         }
270                 }
271                 portctrl |= PORTSCX_PTS_UTMI;
272                 break;
273         case FSL_USB2_PHY_SERIAL:
274                 portctrl |= PORTSCX_PTS_FSLS;
275                 break;
276         default:
277                 return -EINVAL;
278         }
279         fsl_writel(portctrl, &dr_regs->portsc1);
280
281         /* Stop and reset the usb controller */
282         tmp = fsl_readl(&dr_regs->usbcmd);
283         tmp &= ~USB_CMD_RUN_STOP;
284         fsl_writel(tmp, &dr_regs->usbcmd);
285
286         tmp = fsl_readl(&dr_regs->usbcmd);
287         tmp |= USB_CMD_CTRL_RESET;
288         fsl_writel(tmp, &dr_regs->usbcmd);
289
290         /* Wait for reset to complete */
291         timeout = jiffies + FSL_UDC_RESET_TIMEOUT;
292         while (fsl_readl(&dr_regs->usbcmd) & USB_CMD_CTRL_RESET) {
293                 if (time_after(jiffies, timeout)) {
294                         ERR("udc reset timeout!\n");
295                         return -ETIMEDOUT;
296                 }
297                 cpu_relax();
298         }
299
300         /* Set the controller as device mode */
301         tmp = fsl_readl(&dr_regs->usbmode);
302         tmp &= ~USB_MODE_CTRL_MODE_MASK;        /* clear mode bits */
303         tmp |= USB_MODE_CTRL_MODE_DEVICE;
304         /* Disable Setup Lockout */
305         tmp |= USB_MODE_SETUP_LOCK_OFF;
306         if (udc->pdata->es)
307                 tmp |= USB_MODE_ES;
308         fsl_writel(tmp, &dr_regs->usbmode);
309
310         /* Clear the setup status */
311         fsl_writel(0, &dr_regs->usbsts);
312
313         tmp = udc->ep_qh_dma;
314         tmp &= USB_EP_LIST_ADDRESS_MASK;
315         fsl_writel(tmp, &dr_regs->endpointlistaddr);
316
317         VDBG("vir[qh_base] is %p phy[qh_base] is 0x%8x reg is 0x%8x",
318                 udc->ep_qh, (int)tmp,
319                 fsl_readl(&dr_regs->endpointlistaddr));
320
321         max_no_of_ep = (0x0000001F & fsl_readl(&dr_regs->dccparams));
322         for (ep_num = 1; ep_num < max_no_of_ep; ep_num++) {
323                 tmp = fsl_readl(&dr_regs->endptctrl[ep_num]);
324                 tmp &= ~(EPCTRL_TX_TYPE | EPCTRL_RX_TYPE);
325                 tmp |= (EPCTRL_EP_TYPE_BULK << EPCTRL_TX_EP_TYPE_SHIFT)
326                 | (EPCTRL_EP_TYPE_BULK << EPCTRL_RX_EP_TYPE_SHIFT);
327                 fsl_writel(tmp, &dr_regs->endptctrl[ep_num]);
328         }
329         /* Config control enable i/o output, cpu endian register */
330 #ifndef CONFIG_ARCH_MXC
331         if (udc->pdata->have_sysif_regs) {
332                 ctrl = __raw_readl(&usb_sys_regs->control);
333                 ctrl |= USB_CTRL_IOENB;
334                 __raw_writel(ctrl, &usb_sys_regs->control);
335         }
336 #endif
337
338 #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE)
339         /* Turn on cache snooping hardware, since some PowerPC platforms
340          * wholly rely on hardware to deal with cache coherent. */
341
342         if (udc->pdata->have_sysif_regs) {
343                 /* Setup Snooping for all the 4GB space */
344                 tmp = SNOOP_SIZE_2GB;   /* starts from 0x0, size 2G */
345                 __raw_writel(tmp, &usb_sys_regs->snoop1);
346                 tmp |= 0x80000000;      /* starts from 0x8000000, size 2G */
347                 __raw_writel(tmp, &usb_sys_regs->snoop2);
348         }
349 #endif
350
351         return 0;
352 }
353
354 /* Enable DR irq and set controller to run state */
355 static void dr_controller_run(struct fsl_udc *udc)
356 {
357         u32 temp;
358
359         /* Enable DR irq reg */
360         temp = USB_INTR_INT_EN | USB_INTR_ERR_INT_EN
361                 | USB_INTR_PTC_DETECT_EN | USB_INTR_RESET_EN
362                 | USB_INTR_DEVICE_SUSPEND | USB_INTR_SYS_ERR_EN;
363
364         fsl_writel(temp, &dr_regs->usbintr);
365
366         /* Clear stopped bit */
367         udc->stopped = 0;
368
369         /* Set the controller as device mode */
370         temp = fsl_readl(&dr_regs->usbmode);
371         temp |= USB_MODE_CTRL_MODE_DEVICE;
372         fsl_writel(temp, &dr_regs->usbmode);
373
374         /* Set controller to Run */
375         temp = fsl_readl(&dr_regs->usbcmd);
376         temp |= USB_CMD_RUN_STOP;
377         fsl_writel(temp, &dr_regs->usbcmd);
378 }
379
380 static void dr_controller_stop(struct fsl_udc *udc)
381 {
382         unsigned int tmp;
383
384         pr_debug("%s\n", __func__);
385
386         /* if we're in OTG mode, and the Host is currently using the port,
387          * stop now and don't rip the controller out from under the
388          * ehci driver
389          */
390         if (udc->gadget.is_otg) {
391                 if (!(fsl_readl(&dr_regs->otgsc) & OTGSC_STS_USB_ID)) {
392                         pr_debug("udc: Leaving early\n");
393                         return;
394                 }
395         }
396
397         /* disable all INTR */
398         fsl_writel(0, &dr_regs->usbintr);
399
400         /* Set stopped bit for isr */
401         udc->stopped = 1;
402
403         /* disable IO output */
404 /*      usb_sys_regs->control = 0; */
405
406         /* set controller to Stop */
407         tmp = fsl_readl(&dr_regs->usbcmd);
408         tmp &= ~USB_CMD_RUN_STOP;
409         fsl_writel(tmp, &dr_regs->usbcmd);
410 }
411
412 static void dr_ep_setup(unsigned char ep_num, unsigned char dir,
413                         unsigned char ep_type)
414 {
415         unsigned int tmp_epctrl = 0;
416
417         tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
418         if (dir) {
419                 if (ep_num)
420                         tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
421                 tmp_epctrl |= EPCTRL_TX_ENABLE;
422                 tmp_epctrl &= ~EPCTRL_TX_TYPE;
423                 tmp_epctrl |= ((unsigned int)(ep_type)
424                                 << EPCTRL_TX_EP_TYPE_SHIFT);
425         } else {
426                 if (ep_num)
427                         tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
428                 tmp_epctrl |= EPCTRL_RX_ENABLE;
429                 tmp_epctrl &= ~EPCTRL_RX_TYPE;
430                 tmp_epctrl |= ((unsigned int)(ep_type)
431                                 << EPCTRL_RX_EP_TYPE_SHIFT);
432         }
433
434         fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
435 }
436
437 static void
438 dr_ep_change_stall(unsigned char ep_num, unsigned char dir, int value)
439 {
440         u32 tmp_epctrl = 0;
441
442         tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
443
444         if (value) {
445                 /* set the stall bit */
446                 if (dir)
447                         tmp_epctrl |= EPCTRL_TX_EP_STALL;
448                 else
449                         tmp_epctrl |= EPCTRL_RX_EP_STALL;
450         } else {
451                 /* clear the stall bit and reset data toggle */
452                 if (dir) {
453                         tmp_epctrl &= ~EPCTRL_TX_EP_STALL;
454                         tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
455                 } else {
456                         tmp_epctrl &= ~EPCTRL_RX_EP_STALL;
457                         tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
458                 }
459         }
460         fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
461 }
462
463 /* Get stall status of a specific ep
464    Return: 0: not stalled; 1:stalled */
465 static int dr_ep_get_stall(unsigned char ep_num, unsigned char dir)
466 {
467         u32 epctrl;
468
469         epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
470         if (dir)
471                 return (epctrl & EPCTRL_TX_EP_STALL) ? 1 : 0;
472         else
473                 return (epctrl & EPCTRL_RX_EP_STALL) ? 1 : 0;
474 }
475
476 /********************************************************************
477         Internal Structure Build up functions
478 ********************************************************************/
479
480 /*------------------------------------------------------------------
481 * struct_ep_qh_setup(): set the Endpoint Capabilites field of QH
482  * @zlt: Zero Length Termination Select (1: disable; 0: enable)
483  * @mult: Mult field
484  ------------------------------------------------------------------*/
485 static void struct_ep_qh_setup(struct fsl_udc *udc, unsigned char ep_num,
486                 unsigned char dir, unsigned char ep_type,
487                 unsigned int max_pkt_len,
488                 unsigned int zlt, unsigned char mult)
489 {
490         struct ep_queue_head *p_QH = &udc->ep_qh[2 * ep_num + dir];
491         unsigned int tmp = 0;
492
493         /* set the Endpoint Capabilites in QH */
494         switch (ep_type) {
495         case USB_ENDPOINT_XFER_CONTROL:
496                 /* Interrupt On Setup (IOS). for control ep  */
497                 tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
498                         | EP_QUEUE_HEAD_IOS;
499                 break;
500         case USB_ENDPOINT_XFER_ISOC:
501                 tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
502                         | (mult << EP_QUEUE_HEAD_MULT_POS);
503                 break;
504         case USB_ENDPOINT_XFER_BULK:
505         case USB_ENDPOINT_XFER_INT:
506                 tmp = max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS;
507                 break;
508         default:
509                 VDBG("error ep type is %d", ep_type);
510                 return;
511         }
512         if (zlt)
513                 tmp |= EP_QUEUE_HEAD_ZLT_SEL;
514
515         p_QH->max_pkt_length = cpu_to_hc32(tmp);
516         p_QH->next_dtd_ptr = 1;
517         p_QH->size_ioc_int_sts = 0;
518 }
519
520 /* Setup qh structure and ep register for ep0. */
521 static void ep0_setup(struct fsl_udc *udc)
522 {
523         /* the intialization of an ep includes: fields in QH, Regs,
524          * fsl_ep struct */
525         struct_ep_qh_setup(udc, 0, USB_RECV, USB_ENDPOINT_XFER_CONTROL,
526                         USB_MAX_CTRL_PAYLOAD, 0, 0);
527         struct_ep_qh_setup(udc, 0, USB_SEND, USB_ENDPOINT_XFER_CONTROL,
528                         USB_MAX_CTRL_PAYLOAD, 0, 0);
529         dr_ep_setup(0, USB_RECV, USB_ENDPOINT_XFER_CONTROL);
530         dr_ep_setup(0, USB_SEND, USB_ENDPOINT_XFER_CONTROL);
531
532         return;
533
534 }
535
536 /***********************************************************************
537                 Endpoint Management Functions
538 ***********************************************************************/
539
540 /*-------------------------------------------------------------------------
541  * when configurations are set, or when interface settings change
542  * for example the do_set_interface() in gadget layer,
543  * the driver will enable or disable the relevant endpoints
544  * ep0 doesn't use this routine. It is always enabled.
545 -------------------------------------------------------------------------*/
546 static int fsl_ep_enable(struct usb_ep *_ep,
547                 const struct usb_endpoint_descriptor *desc)
548 {
549         struct fsl_udc *udc = NULL;
550         struct fsl_ep *ep = NULL;
551         unsigned short max = 0;
552         unsigned char mult = 0, zlt;
553         int retval = -EINVAL;
554         unsigned long flags = 0;
555
556         ep = container_of(_ep, struct fsl_ep, ep);
557
558         /* catch various bogus parameters */
559         if (!_ep || !desc
560                         || (desc->bDescriptorType != USB_DT_ENDPOINT))
561                 return -EINVAL;
562
563         udc = ep->udc;
564
565         if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN))
566                 return -ESHUTDOWN;
567
568         max = usb_endpoint_maxp(desc);
569
570         /* Disable automatic zlp generation.  Driver is responsible to indicate
571          * explicitly through req->req.zero.  This is needed to enable multi-td
572          * request. */
573         zlt = 1;
574
575         /* Assume the max packet size from gadget is always correct */
576         switch (desc->bmAttributes & 0x03) {
577         case USB_ENDPOINT_XFER_CONTROL:
578         case USB_ENDPOINT_XFER_BULK:
579         case USB_ENDPOINT_XFER_INT:
580                 /* mult = 0.  Execute N Transactions as demonstrated by
581                  * the USB variable length packet protocol where N is
582                  * computed using the Maximum Packet Length (dQH) and
583                  * the Total Bytes field (dTD) */
584                 mult = 0;
585                 break;
586         case USB_ENDPOINT_XFER_ISOC:
587                 /* Calculate transactions needed for high bandwidth iso */
588                 mult = (unsigned char)(1 + ((max >> 11) & 0x03));
589                 max = max & 0x7ff;      /* bit 0~10 */
590                 /* 3 transactions at most */
591                 if (mult > 3)
592                         goto en_done;
593                 break;
594         default:
595                 goto en_done;
596         }
597
598         spin_lock_irqsave(&udc->lock, flags);
599         ep->ep.maxpacket = max;
600         ep->ep.desc = desc;
601         ep->stopped = 0;
602
603         /* Controller related setup */
604         /* Init EPx Queue Head (Ep Capabilites field in QH
605          * according to max, zlt, mult) */
606         struct_ep_qh_setup(udc, (unsigned char) ep_index(ep),
607                         (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
608                                         ?  USB_SEND : USB_RECV),
609                         (unsigned char) (desc->bmAttributes
610                                         & USB_ENDPOINT_XFERTYPE_MASK),
611                         max, zlt, mult);
612
613         /* Init endpoint ctrl register */
614         dr_ep_setup((unsigned char) ep_index(ep),
615                         (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
616                                         ? USB_SEND : USB_RECV),
617                         (unsigned char) (desc->bmAttributes
618                                         & USB_ENDPOINT_XFERTYPE_MASK));
619
620         spin_unlock_irqrestore(&udc->lock, flags);
621         retval = 0;
622
623         VDBG("enabled %s (ep%d%s) maxpacket %d",ep->ep.name,
624                         ep->ep.desc->bEndpointAddress & 0x0f,
625                         (desc->bEndpointAddress & USB_DIR_IN)
626                                 ? "in" : "out", max);
627 en_done:
628         return retval;
629 }
630
631 /*---------------------------------------------------------------------
632  * @ep : the ep being unconfigured. May not be ep0
633  * Any pending and uncomplete req will complete with status (-ESHUTDOWN)
634 *---------------------------------------------------------------------*/
635 static int fsl_ep_disable(struct usb_ep *_ep)
636 {
637         struct fsl_udc *udc = NULL;
638         struct fsl_ep *ep = NULL;
639         unsigned long flags = 0;
640         u32 epctrl;
641         int ep_num;
642
643         ep = container_of(_ep, struct fsl_ep, ep);
644         if (!_ep || !ep->ep.desc) {
645                 VDBG("%s not enabled", _ep ? ep->ep.name : NULL);
646                 return -EINVAL;
647         }
648
649         /* disable ep on controller */
650         ep_num = ep_index(ep);
651         epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
652         if (ep_is_in(ep)) {
653                 epctrl &= ~(EPCTRL_TX_ENABLE | EPCTRL_TX_TYPE);
654                 epctrl |= EPCTRL_EP_TYPE_BULK << EPCTRL_TX_EP_TYPE_SHIFT;
655         } else {
656                 epctrl &= ~(EPCTRL_RX_ENABLE | EPCTRL_TX_TYPE);
657                 epctrl |= EPCTRL_EP_TYPE_BULK << EPCTRL_RX_EP_TYPE_SHIFT;
658         }
659         fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
660
661         udc = (struct fsl_udc *)ep->udc;
662         spin_lock_irqsave(&udc->lock, flags);
663
664         /* nuke all pending requests (does flush) */
665         nuke(ep, -ESHUTDOWN);
666
667         ep->ep.desc = NULL;
668         ep->stopped = 1;
669         spin_unlock_irqrestore(&udc->lock, flags);
670
671         VDBG("disabled %s OK", _ep->name);
672         return 0;
673 }
674
675 /*---------------------------------------------------------------------
676  * allocate a request object used by this endpoint
677  * the main operation is to insert the req->queue to the eq->queue
678  * Returns the request, or null if one could not be allocated
679 *---------------------------------------------------------------------*/
680 static struct usb_request *
681 fsl_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
682 {
683         struct fsl_req *req = NULL;
684
685         req = kzalloc(sizeof *req, gfp_flags);
686         if (!req)
687                 return NULL;
688
689         req->req.dma = DMA_ADDR_INVALID;
690         INIT_LIST_HEAD(&req->queue);
691
692         return &req->req;
693 }
694
695 static void fsl_free_request(struct usb_ep *_ep, struct usb_request *_req)
696 {
697         struct fsl_req *req = NULL;
698
699         req = container_of(_req, struct fsl_req, req);
700
701         if (_req)
702                 kfree(req);
703 }
704
705 /* Actually add a dTD chain to an empty dQH and let go */
706 static void fsl_prime_ep(struct fsl_ep *ep, struct ep_td_struct *td)
707 {
708         struct ep_queue_head *qh = get_qh_by_ep(ep);
709
710         /* Write dQH next pointer and terminate bit to 0 */
711         qh->next_dtd_ptr = cpu_to_hc32(td->td_dma
712                         & EP_QUEUE_HEAD_NEXT_POINTER_MASK);
713
714         /* Clear active and halt bit */
715         qh->size_ioc_int_sts &= cpu_to_hc32(~(EP_QUEUE_HEAD_STATUS_ACTIVE
716                                         | EP_QUEUE_HEAD_STATUS_HALT));
717
718         /* Ensure that updates to the QH will occur before priming. */
719         wmb();
720
721         /* Prime endpoint by writing correct bit to ENDPTPRIME */
722         fsl_writel(ep_is_in(ep) ? (1 << (ep_index(ep) + 16))
723                         : (1 << (ep_index(ep))), &dr_regs->endpointprime);
724 }
725
726 /* Add dTD chain to the dQH of an EP */
727 static void fsl_queue_td(struct fsl_ep *ep, struct fsl_req *req)
728 {
729         u32 temp, bitmask, tmp_stat;
730
731         /* VDBG("QH addr Register 0x%8x", dr_regs->endpointlistaddr);
732         VDBG("ep_qh[%d] addr is 0x%8x", i, (u32)&(ep->udc->ep_qh[i])); */
733
734         bitmask = ep_is_in(ep)
735                 ? (1 << (ep_index(ep) + 16))
736                 : (1 << (ep_index(ep)));
737
738         /* check if the pipe is empty */
739         if (!(list_empty(&ep->queue)) && !(ep_index(ep) == 0)) {
740                 /* Add td to the end */
741                 struct fsl_req *lastreq;
742                 lastreq = list_entry(ep->queue.prev, struct fsl_req, queue);
743                 lastreq->tail->next_td_ptr =
744                         cpu_to_hc32(req->head->td_dma & DTD_ADDR_MASK);
745                 /* Ensure dTD's next dtd pointer to be updated */
746                 wmb();
747                 /* Read prime bit, if 1 goto done */
748                 if (fsl_readl(&dr_regs->endpointprime) & bitmask)
749                         return;
750
751                 do {
752                         /* Set ATDTW bit in USBCMD */
753                         temp = fsl_readl(&dr_regs->usbcmd);
754                         fsl_writel(temp | USB_CMD_ATDTW, &dr_regs->usbcmd);
755
756                         /* Read correct status bit */
757                         tmp_stat = fsl_readl(&dr_regs->endptstatus) & bitmask;
758
759                 } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_ATDTW));
760
761                 /* Write ATDTW bit to 0 */
762                 temp = fsl_readl(&dr_regs->usbcmd);
763                 fsl_writel(temp & ~USB_CMD_ATDTW, &dr_regs->usbcmd);
764
765                 if (tmp_stat)
766                         return;
767         }
768
769         fsl_prime_ep(ep, req->head);
770 }
771
772 /* Fill in the dTD structure
773  * @req: request that the transfer belongs to
774  * @length: return actually data length of the dTD
775  * @dma: return dma address of the dTD
776  * @is_last: return flag if it is the last dTD of the request
777  * return: pointer to the built dTD */
778 static struct ep_td_struct *fsl_build_dtd(struct fsl_req *req, unsigned *length,
779                 dma_addr_t *dma, int *is_last, gfp_t gfp_flags)
780 {
781         u32 swap_temp;
782         struct ep_td_struct *dtd;
783
784         /* how big will this transfer be? */
785         *length = min(req->req.length - req->req.actual,
786                         (unsigned)EP_MAX_LENGTH_TRANSFER);
787
788         dtd = dma_pool_alloc(udc_controller->td_pool, gfp_flags, dma);
789         if (dtd == NULL)
790                 return dtd;
791
792         dtd->td_dma = *dma;
793         /* Clear reserved field */
794         swap_temp = hc32_to_cpu(dtd->size_ioc_sts);
795         swap_temp &= ~DTD_RESERVED_FIELDS;
796         dtd->size_ioc_sts = cpu_to_hc32(swap_temp);
797
798         /* Init all of buffer page pointers */
799         swap_temp = (u32) (req->req.dma + req->req.actual);
800         dtd->buff_ptr0 = cpu_to_hc32(swap_temp);
801         dtd->buff_ptr1 = cpu_to_hc32(swap_temp + 0x1000);
802         dtd->buff_ptr2 = cpu_to_hc32(swap_temp + 0x2000);
803         dtd->buff_ptr3 = cpu_to_hc32(swap_temp + 0x3000);
804         dtd->buff_ptr4 = cpu_to_hc32(swap_temp + 0x4000);
805
806         req->req.actual += *length;
807
808         /* zlp is needed if req->req.zero is set */
809         if (req->req.zero) {
810                 if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0)
811                         *is_last = 1;
812                 else
813                         *is_last = 0;
814         } else if (req->req.length == req->req.actual)
815                 *is_last = 1;
816         else
817                 *is_last = 0;
818
819         if ((*is_last) == 0)
820                 VDBG("multi-dtd request!");
821         /* Fill in the transfer size; set active bit */
822         swap_temp = ((*length << DTD_LENGTH_BIT_POS) | DTD_STATUS_ACTIVE);
823
824         /* Enable interrupt for the last dtd of a request */
825         if (*is_last && !req->req.no_interrupt)
826                 swap_temp |= DTD_IOC;
827
828         dtd->size_ioc_sts = cpu_to_hc32(swap_temp);
829
830         mb();
831
832         VDBG("length = %d address= 0x%x", *length, (int)*dma);
833
834         return dtd;
835 }
836
837 /* Generate dtd chain for a request */
838 static int fsl_req_to_dtd(struct fsl_req *req, gfp_t gfp_flags)
839 {
840         unsigned        count;
841         int             is_last;
842         int             is_first =1;
843         struct ep_td_struct     *last_dtd = NULL, *dtd;
844         dma_addr_t dma;
845
846         do {
847                 dtd = fsl_build_dtd(req, &count, &dma, &is_last, gfp_flags);
848                 if (dtd == NULL)
849                         return -ENOMEM;
850
851                 if (is_first) {
852                         is_first = 0;
853                         req->head = dtd;
854                 } else {
855                         last_dtd->next_td_ptr = cpu_to_hc32(dma);
856                         last_dtd->next_td_virt = dtd;
857                 }
858                 last_dtd = dtd;
859
860                 req->dtd_count++;
861         } while (!is_last);
862
863         dtd->next_td_ptr = cpu_to_hc32(DTD_NEXT_TERMINATE);
864
865         req->tail = dtd;
866
867         return 0;
868 }
869
870 /* queues (submits) an I/O request to an endpoint */
871 static int
872 fsl_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
873 {
874         struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
875         struct fsl_req *req = container_of(_req, struct fsl_req, req);
876         struct fsl_udc *udc;
877         unsigned long flags;
878         int ret;
879
880         /* catch various bogus parameters */
881         if (!_req || !req->req.complete || !req->req.buf
882                         || !list_empty(&req->queue)) {
883                 VDBG("%s, bad params", __func__);
884                 return -EINVAL;
885         }
886         if (unlikely(!_ep || !ep->ep.desc)) {
887                 VDBG("%s, bad ep", __func__);
888                 return -EINVAL;
889         }
890         if (usb_endpoint_xfer_isoc(ep->ep.desc)) {
891                 if (req->req.length > ep->ep.maxpacket)
892                         return -EMSGSIZE;
893         }
894
895         udc = ep->udc;
896         if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
897                 return -ESHUTDOWN;
898
899         req->ep = ep;
900
901         ret = usb_gadget_map_request(&ep->udc->gadget, &req->req, ep_is_in(ep));
902         if (ret)
903                 return ret;
904
905         req->req.status = -EINPROGRESS;
906         req->req.actual = 0;
907         req->dtd_count = 0;
908
909         /* build dtds and push them to device queue */
910         if (!fsl_req_to_dtd(req, gfp_flags)) {
911                 spin_lock_irqsave(&udc->lock, flags);
912                 fsl_queue_td(ep, req);
913         } else {
914                 return -ENOMEM;
915         }
916
917         /* irq handler advances the queue */
918         if (req != NULL)
919                 list_add_tail(&req->queue, &ep->queue);
920         spin_unlock_irqrestore(&udc->lock, flags);
921
922         return 0;
923 }
924
925 /* dequeues (cancels, unlinks) an I/O request from an endpoint */
926 static int fsl_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
927 {
928         struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
929         struct fsl_req *req;
930         unsigned long flags;
931         int ep_num, stopped, ret = 0;
932         u32 epctrl;
933
934         if (!_ep || !_req)
935                 return -EINVAL;
936
937         spin_lock_irqsave(&ep->udc->lock, flags);
938         stopped = ep->stopped;
939
940         /* Stop the ep before we deal with the queue */
941         ep->stopped = 1;
942         ep_num = ep_index(ep);
943         epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
944         if (ep_is_in(ep))
945                 epctrl &= ~EPCTRL_TX_ENABLE;
946         else
947                 epctrl &= ~EPCTRL_RX_ENABLE;
948         fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
949
950         /* make sure it's actually queued on this endpoint */
951         list_for_each_entry(req, &ep->queue, queue) {
952                 if (&req->req == _req)
953                         break;
954         }
955         if (&req->req != _req) {
956                 ret = -EINVAL;
957                 goto out;
958         }
959
960         /* The request is in progress, or completed but not dequeued */
961         if (ep->queue.next == &req->queue) {
962                 _req->status = -ECONNRESET;
963                 fsl_ep_fifo_flush(_ep); /* flush current transfer */
964
965                 /* The request isn't the last request in this ep queue */
966                 if (req->queue.next != &ep->queue) {
967                         struct fsl_req *next_req;
968
969                         next_req = list_entry(req->queue.next, struct fsl_req,
970                                         queue);
971
972                         /* prime with dTD of next request */
973                         fsl_prime_ep(ep, next_req->head);
974                 }
975         /* The request hasn't been processed, patch up the TD chain */
976         } else {
977                 struct fsl_req *prev_req;
978
979                 prev_req = list_entry(req->queue.prev, struct fsl_req, queue);
980                 prev_req->tail->next_td_ptr = req->tail->next_td_ptr;
981         }
982
983         done(ep, req, -ECONNRESET);
984
985         /* Enable EP */
986 out:    epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
987         if (ep_is_in(ep))
988                 epctrl |= EPCTRL_TX_ENABLE;
989         else
990                 epctrl |= EPCTRL_RX_ENABLE;
991         fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
992         ep->stopped = stopped;
993
994         spin_unlock_irqrestore(&ep->udc->lock, flags);
995         return ret;
996 }
997
998 /*-------------------------------------------------------------------------*/
999
1000 /*-----------------------------------------------------------------
1001  * modify the endpoint halt feature
1002  * @ep: the non-isochronous endpoint being stalled
1003  * @value: 1--set halt  0--clear halt
1004  * Returns zero, or a negative error code.
1005 *----------------------------------------------------------------*/
1006 static int fsl_ep_set_halt(struct usb_ep *_ep, int value)
1007 {
1008         struct fsl_ep *ep = NULL;
1009         unsigned long flags = 0;
1010         int status = -EOPNOTSUPP;       /* operation not supported */
1011         unsigned char ep_dir = 0, ep_num = 0;
1012         struct fsl_udc *udc = NULL;
1013
1014         ep = container_of(_ep, struct fsl_ep, ep);
1015         udc = ep->udc;
1016         if (!_ep || !ep->ep.desc) {
1017                 status = -EINVAL;
1018                 goto out;
1019         }
1020
1021         if (usb_endpoint_xfer_isoc(ep->ep.desc)) {
1022                 status = -EOPNOTSUPP;
1023                 goto out;
1024         }
1025
1026         /* Attempt to halt IN ep will fail if any transfer requests
1027          * are still queue */
1028         if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
1029                 status = -EAGAIN;
1030                 goto out;
1031         }
1032
1033         status = 0;
1034         ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
1035         ep_num = (unsigned char)(ep_index(ep));
1036         spin_lock_irqsave(&ep->udc->lock, flags);
1037         dr_ep_change_stall(ep_num, ep_dir, value);
1038         spin_unlock_irqrestore(&ep->udc->lock, flags);
1039
1040         if (ep_index(ep) == 0) {
1041                 udc->ep0_state = WAIT_FOR_SETUP;
1042                 udc->ep0_dir = 0;
1043         }
1044 out:
1045         VDBG(" %s %s halt stat %d", ep->ep.name,
1046                         value ?  "set" : "clear", status);
1047
1048         return status;
1049 }
1050
1051 static int fsl_ep_fifo_status(struct usb_ep *_ep)
1052 {
1053         struct fsl_ep *ep;
1054         struct fsl_udc *udc;
1055         int size = 0;
1056         u32 bitmask;
1057         struct ep_queue_head *qh;
1058
1059         ep = container_of(_ep, struct fsl_ep, ep);
1060         if (!_ep || (!ep->ep.desc && ep_index(ep) != 0))
1061                 return -ENODEV;
1062
1063         udc = (struct fsl_udc *)ep->udc;
1064
1065         if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
1066                 return -ESHUTDOWN;
1067
1068         qh = get_qh_by_ep(ep);
1069
1070         bitmask = (ep_is_in(ep)) ? (1 << (ep_index(ep) + 16)) :
1071             (1 << (ep_index(ep)));
1072
1073         if (fsl_readl(&dr_regs->endptstatus) & bitmask)
1074                 size = (qh->size_ioc_int_sts & DTD_PACKET_SIZE)
1075                     >> DTD_LENGTH_BIT_POS;
1076
1077         pr_debug("%s %u\n", __func__, size);
1078         return size;
1079 }
1080
1081 static void fsl_ep_fifo_flush(struct usb_ep *_ep)
1082 {
1083         struct fsl_ep *ep;
1084         int ep_num, ep_dir;
1085         u32 bits;
1086         unsigned long timeout;
1087 #define FSL_UDC_FLUSH_TIMEOUT 1000
1088
1089         if (!_ep) {
1090                 return;
1091         } else {
1092                 ep = container_of(_ep, struct fsl_ep, ep);
1093                 if (!ep->ep.desc)
1094                         return;
1095         }
1096         ep_num = ep_index(ep);
1097         ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
1098
1099         if (ep_num == 0)
1100                 bits = (1 << 16) | 1;
1101         else if (ep_dir == USB_SEND)
1102                 bits = 1 << (16 + ep_num);
1103         else
1104                 bits = 1 << ep_num;
1105
1106         timeout = jiffies + FSL_UDC_FLUSH_TIMEOUT;
1107         do {
1108                 fsl_writel(bits, &dr_regs->endptflush);
1109
1110                 /* Wait until flush complete */
1111                 while (fsl_readl(&dr_regs->endptflush)) {
1112                         if (time_after(jiffies, timeout)) {
1113                                 ERR("ep flush timeout\n");
1114                                 return;
1115                         }
1116                         cpu_relax();
1117                 }
1118                 /* See if we need to flush again */
1119         } while (fsl_readl(&dr_regs->endptstatus) & bits);
1120 }
1121
1122 static struct usb_ep_ops fsl_ep_ops = {
1123         .enable = fsl_ep_enable,
1124         .disable = fsl_ep_disable,
1125
1126         .alloc_request = fsl_alloc_request,
1127         .free_request = fsl_free_request,
1128
1129         .queue = fsl_ep_queue,
1130         .dequeue = fsl_ep_dequeue,
1131
1132         .set_halt = fsl_ep_set_halt,
1133         .fifo_status = fsl_ep_fifo_status,
1134         .fifo_flush = fsl_ep_fifo_flush,        /* flush fifo */
1135 };
1136
1137 /*-------------------------------------------------------------------------
1138                 Gadget Driver Layer Operations
1139 -------------------------------------------------------------------------*/
1140
1141 /*----------------------------------------------------------------------
1142  * Get the current frame number (from DR frame_index Reg )
1143  *----------------------------------------------------------------------*/
1144 static int fsl_get_frame(struct usb_gadget *gadget)
1145 {
1146         return (int)(fsl_readl(&dr_regs->frindex) & USB_FRINDEX_MASKS);
1147 }
1148
1149 /*-----------------------------------------------------------------------
1150  * Tries to wake up the host connected to this gadget
1151  -----------------------------------------------------------------------*/
1152 static int fsl_wakeup(struct usb_gadget *gadget)
1153 {
1154         struct fsl_udc *udc = container_of(gadget, struct fsl_udc, gadget);
1155         u32 portsc;
1156
1157         /* Remote wakeup feature not enabled by host */
1158         if (!udc->remote_wakeup)
1159                 return -ENOTSUPP;
1160
1161         portsc = fsl_readl(&dr_regs->portsc1);
1162         /* not suspended? */
1163         if (!(portsc & PORTSCX_PORT_SUSPEND))
1164                 return 0;
1165         /* trigger force resume */
1166         portsc |= PORTSCX_PORT_FORCE_RESUME;
1167         fsl_writel(portsc, &dr_regs->portsc1);
1168         return 0;
1169 }
1170
1171 static int can_pullup(struct fsl_udc *udc)
1172 {
1173         return udc->driver && udc->softconnect && udc->vbus_active;
1174 }
1175
1176 /* Notify controller that VBUS is powered, Called by whatever
1177    detects VBUS sessions */
1178 static int fsl_vbus_session(struct usb_gadget *gadget, int is_active)
1179 {
1180         struct fsl_udc  *udc;
1181         unsigned long   flags;
1182
1183         udc = container_of(gadget, struct fsl_udc, gadget);
1184         spin_lock_irqsave(&udc->lock, flags);
1185         VDBG("VBUS %s", is_active ? "on" : "off");
1186         udc->vbus_active = (is_active != 0);
1187         if (can_pullup(udc))
1188                 fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
1189                                 &dr_regs->usbcmd);
1190         else
1191                 fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
1192                                 &dr_regs->usbcmd);
1193         spin_unlock_irqrestore(&udc->lock, flags);
1194         return 0;
1195 }
1196
1197 /* constrain controller's VBUS power usage
1198  * This call is used by gadget drivers during SET_CONFIGURATION calls,
1199  * reporting how much power the device may consume.  For example, this
1200  * could affect how quickly batteries are recharged.
1201  *
1202  * Returns zero on success, else negative errno.
1203  */
1204 static int fsl_vbus_draw(struct usb_gadget *gadget, unsigned mA)
1205 {
1206         struct fsl_udc *udc;
1207
1208         udc = container_of(gadget, struct fsl_udc, gadget);
1209         if (!IS_ERR_OR_NULL(udc->transceiver))
1210                 return usb_phy_set_power(udc->transceiver, mA);
1211         return -ENOTSUPP;
1212 }
1213
1214 /* Change Data+ pullup status
1215  * this func is used by usb_gadget_connect/disconnet
1216  */
1217 static int fsl_pullup(struct usb_gadget *gadget, int is_on)
1218 {
1219         struct fsl_udc *udc;
1220
1221         udc = container_of(gadget, struct fsl_udc, gadget);
1222
1223         if (!udc->vbus_active)
1224                 return -EOPNOTSUPP;
1225
1226         udc->softconnect = (is_on != 0);
1227         if (can_pullup(udc))
1228                 fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
1229                                 &dr_regs->usbcmd);
1230         else
1231                 fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
1232                                 &dr_regs->usbcmd);
1233
1234         return 0;
1235 }
1236
1237 static int fsl_udc_start(struct usb_gadget *g,
1238                 struct usb_gadget_driver *driver);
1239 static int fsl_udc_stop(struct usb_gadget *g);
1240
1241 static const struct usb_gadget_ops fsl_gadget_ops = {
1242         .get_frame = fsl_get_frame,
1243         .wakeup = fsl_wakeup,
1244 /*      .set_selfpowered = fsl_set_selfpowered, */ /* Always selfpowered */
1245         .vbus_session = fsl_vbus_session,
1246         .vbus_draw = fsl_vbus_draw,
1247         .pullup = fsl_pullup,
1248         .udc_start = fsl_udc_start,
1249         .udc_stop = fsl_udc_stop,
1250 };
1251
1252 /* Set protocol stall on ep0, protocol stall will automatically be cleared
1253    on new transaction */
1254 static void ep0stall(struct fsl_udc *udc)
1255 {
1256         u32 tmp;
1257
1258         /* must set tx and rx to stall at the same time */
1259         tmp = fsl_readl(&dr_regs->endptctrl[0]);
1260         tmp |= EPCTRL_TX_EP_STALL | EPCTRL_RX_EP_STALL;
1261         fsl_writel(tmp, &dr_regs->endptctrl[0]);
1262         udc->ep0_state = WAIT_FOR_SETUP;
1263         udc->ep0_dir = 0;
1264 }
1265
1266 /* Prime a status phase for ep0 */
1267 static int ep0_prime_status(struct fsl_udc *udc, int direction)
1268 {
1269         struct fsl_req *req = udc->status_req;
1270         struct fsl_ep *ep;
1271         int ret;
1272
1273         if (direction == EP_DIR_IN)
1274                 udc->ep0_dir = USB_DIR_IN;
1275         else
1276                 udc->ep0_dir = USB_DIR_OUT;
1277
1278         ep = &udc->eps[0];
1279         if (udc->ep0_state != DATA_STATE_XMIT)
1280                 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1281
1282         req->ep = ep;
1283         req->req.length = 0;
1284         req->req.status = -EINPROGRESS;
1285         req->req.actual = 0;
1286         req->req.complete = NULL;
1287         req->dtd_count = 0;
1288
1289         ret = usb_gadget_map_request(&ep->udc->gadget, &req->req, ep_is_in(ep));
1290         if (ret)
1291                 return ret;
1292
1293         if (fsl_req_to_dtd(req, GFP_ATOMIC) == 0)
1294                 fsl_queue_td(ep, req);
1295         else
1296                 return -ENOMEM;
1297
1298         list_add_tail(&req->queue, &ep->queue);
1299
1300         return 0;
1301 }
1302
1303 static void udc_reset_ep_queue(struct fsl_udc *udc, u8 pipe)
1304 {
1305         struct fsl_ep *ep = get_ep_by_pipe(udc, pipe);
1306
1307         if (ep->name)
1308                 nuke(ep, -ESHUTDOWN);
1309 }
1310
1311 /*
1312  * ch9 Set address
1313  */
1314 static void ch9setaddress(struct fsl_udc *udc, u16 value, u16 index, u16 length)
1315 {
1316         /* Save the new address to device struct */
1317         udc->device_address = (u8) value;
1318         /* Update usb state */
1319         udc->usb_state = USB_STATE_ADDRESS;
1320         /* Status phase */
1321         if (ep0_prime_status(udc, EP_DIR_IN))
1322                 ep0stall(udc);
1323 }
1324
1325 /*
1326  * ch9 Get status
1327  */
1328 static void ch9getstatus(struct fsl_udc *udc, u8 request_type, u16 value,
1329                 u16 index, u16 length)
1330 {
1331         u16 tmp = 0;            /* Status, cpu endian */
1332         struct fsl_req *req;
1333         struct fsl_ep *ep;
1334         int ret;
1335
1336         ep = &udc->eps[0];
1337
1338         if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1339                 /* Get device status */
1340                 tmp = udc->gadget.is_selfpowered;
1341                 tmp |= udc->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP;
1342         } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
1343                 /* Get interface status */
1344                 /* We don't have interface information in udc driver */
1345                 tmp = 0;
1346         } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
1347                 /* Get endpoint status */
1348                 struct fsl_ep *target_ep;
1349
1350                 target_ep = get_ep_by_pipe(udc, get_pipe_by_windex(index));
1351
1352                 /* stall if endpoint doesn't exist */
1353                 if (!target_ep->ep.desc)
1354                         goto stall;
1355                 tmp = dr_ep_get_stall(ep_index(target_ep), ep_is_in(target_ep))
1356                                 << USB_ENDPOINT_HALT;
1357         }
1358
1359         udc->ep0_dir = USB_DIR_IN;
1360         /* Borrow the per device status_req */
1361         req = udc->status_req;
1362         /* Fill in the reqest structure */
1363         *((u16 *) req->req.buf) = cpu_to_le16(tmp);
1364
1365         req->ep = ep;
1366         req->req.length = 2;
1367         req->req.status = -EINPROGRESS;
1368         req->req.actual = 0;
1369         req->req.complete = NULL;
1370         req->dtd_count = 0;
1371
1372         ret = usb_gadget_map_request(&ep->udc->gadget, &req->req, ep_is_in(ep));
1373         if (ret)
1374                 goto stall;
1375
1376         /* prime the data phase */
1377         if ((fsl_req_to_dtd(req, GFP_ATOMIC) == 0))
1378                 fsl_queue_td(ep, req);
1379         else                    /* no mem */
1380                 goto stall;
1381
1382         list_add_tail(&req->queue, &ep->queue);
1383         udc->ep0_state = DATA_STATE_XMIT;
1384         if (ep0_prime_status(udc, EP_DIR_OUT))
1385                 ep0stall(udc);
1386
1387         return;
1388 stall:
1389         ep0stall(udc);
1390 }
1391
1392 static void setup_received_irq(struct fsl_udc *udc,
1393                 struct usb_ctrlrequest *setup)
1394 __releases(udc->lock)
1395 __acquires(udc->lock)
1396 {
1397         u16 wValue = le16_to_cpu(setup->wValue);
1398         u16 wIndex = le16_to_cpu(setup->wIndex);
1399         u16 wLength = le16_to_cpu(setup->wLength);
1400
1401         udc_reset_ep_queue(udc, 0);
1402
1403         /* We process some stardard setup requests here */
1404         switch (setup->bRequest) {
1405         case USB_REQ_GET_STATUS:
1406                 /* Data+Status phase from udc */
1407                 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
1408                                         != (USB_DIR_IN | USB_TYPE_STANDARD))
1409                         break;
1410                 ch9getstatus(udc, setup->bRequestType, wValue, wIndex, wLength);
1411                 return;
1412
1413         case USB_REQ_SET_ADDRESS:
1414                 /* Status phase from udc */
1415                 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD
1416                                                 | USB_RECIP_DEVICE))
1417                         break;
1418                 ch9setaddress(udc, wValue, wIndex, wLength);
1419                 return;
1420
1421         case USB_REQ_CLEAR_FEATURE:
1422         case USB_REQ_SET_FEATURE:
1423                 /* Status phase from udc */
1424         {
1425                 int rc = -EOPNOTSUPP;
1426                 u16 ptc = 0;
1427
1428                 if ((setup->bRequestType & (USB_RECIP_MASK | USB_TYPE_MASK))
1429                                 == (USB_RECIP_ENDPOINT | USB_TYPE_STANDARD)) {
1430                         int pipe = get_pipe_by_windex(wIndex);
1431                         struct fsl_ep *ep;
1432
1433                         if (wValue != 0 || wLength != 0 || pipe >= udc->max_ep)
1434                                 break;
1435                         ep = get_ep_by_pipe(udc, pipe);
1436
1437                         spin_unlock(&udc->lock);
1438                         rc = fsl_ep_set_halt(&ep->ep,
1439                                         (setup->bRequest == USB_REQ_SET_FEATURE)
1440                                                 ? 1 : 0);
1441                         spin_lock(&udc->lock);
1442
1443                 } else if ((setup->bRequestType & (USB_RECIP_MASK
1444                                 | USB_TYPE_MASK)) == (USB_RECIP_DEVICE
1445                                 | USB_TYPE_STANDARD)) {
1446                         /* Note: The driver has not include OTG support yet.
1447                          * This will be set when OTG support is added */
1448                         if (wValue == USB_DEVICE_TEST_MODE)
1449                                 ptc = wIndex >> 8;
1450                         else if (gadget_is_otg(&udc->gadget)) {
1451                                 if (setup->bRequest ==
1452                                     USB_DEVICE_B_HNP_ENABLE)
1453                                         udc->gadget.b_hnp_enable = 1;
1454                                 else if (setup->bRequest ==
1455                                          USB_DEVICE_A_HNP_SUPPORT)
1456                                         udc->gadget.a_hnp_support = 1;
1457                                 else if (setup->bRequest ==
1458                                          USB_DEVICE_A_ALT_HNP_SUPPORT)
1459                                         udc->gadget.a_alt_hnp_support = 1;
1460                         }
1461                         rc = 0;
1462                 } else
1463                         break;
1464
1465                 if (rc == 0) {
1466                         if (ep0_prime_status(udc, EP_DIR_IN))
1467                                 ep0stall(udc);
1468                 }
1469                 if (ptc) {
1470                         u32 tmp;
1471
1472                         mdelay(10);
1473                         tmp = fsl_readl(&dr_regs->portsc1) | (ptc << 16);
1474                         fsl_writel(tmp, &dr_regs->portsc1);
1475                         printk(KERN_INFO "udc: switch to test mode %d.\n", ptc);
1476                 }
1477
1478                 return;
1479         }
1480
1481         default:
1482                 break;
1483         }
1484
1485         /* Requests handled by gadget */
1486         if (wLength) {
1487                 /* Data phase from gadget, status phase from udc */
1488                 udc->ep0_dir = (setup->bRequestType & USB_DIR_IN)
1489                                 ?  USB_DIR_IN : USB_DIR_OUT;
1490                 spin_unlock(&udc->lock);
1491                 if (udc->driver->setup(&udc->gadget,
1492                                 &udc->local_setup_buff) < 0)
1493                         ep0stall(udc);
1494                 spin_lock(&udc->lock);
1495                 udc->ep0_state = (setup->bRequestType & USB_DIR_IN)
1496                                 ?  DATA_STATE_XMIT : DATA_STATE_RECV;
1497                 /*
1498                  * If the data stage is IN, send status prime immediately.
1499                  * See 2.0 Spec chapter 8.5.3.3 for detail.
1500                  */
1501                 if (udc->ep0_state == DATA_STATE_XMIT)
1502                         if (ep0_prime_status(udc, EP_DIR_OUT))
1503                                 ep0stall(udc);
1504
1505         } else {
1506                 /* No data phase, IN status from gadget */
1507                 udc->ep0_dir = USB_DIR_IN;
1508                 spin_unlock(&udc->lock);
1509                 if (udc->driver->setup(&udc->gadget,
1510                                 &udc->local_setup_buff) < 0)
1511                         ep0stall(udc);
1512                 spin_lock(&udc->lock);
1513                 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1514         }
1515 }
1516
1517 /* Process request for Data or Status phase of ep0
1518  * prime status phase if needed */
1519 static void ep0_req_complete(struct fsl_udc *udc, struct fsl_ep *ep0,
1520                 struct fsl_req *req)
1521 {
1522         if (udc->usb_state == USB_STATE_ADDRESS) {
1523                 /* Set the new address */
1524                 u32 new_address = (u32) udc->device_address;
1525                 fsl_writel(new_address << USB_DEVICE_ADDRESS_BIT_POS,
1526                                 &dr_regs->deviceaddr);
1527         }
1528
1529         done(ep0, req, 0);
1530
1531         switch (udc->ep0_state) {
1532         case DATA_STATE_XMIT:
1533                 /* already primed at setup_received_irq */
1534                 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1535                 break;
1536         case DATA_STATE_RECV:
1537                 /* send status phase */
1538                 if (ep0_prime_status(udc, EP_DIR_IN))
1539                         ep0stall(udc);
1540                 break;
1541         case WAIT_FOR_OUT_STATUS:
1542                 udc->ep0_state = WAIT_FOR_SETUP;
1543                 break;
1544         case WAIT_FOR_SETUP:
1545                 ERR("Unexpect ep0 packets\n");
1546                 break;
1547         default:
1548                 ep0stall(udc);
1549                 break;
1550         }
1551 }
1552
1553 /* Tripwire mechanism to ensure a setup packet payload is extracted without
1554  * being corrupted by another incoming setup packet */
1555 static void tripwire_handler(struct fsl_udc *udc, u8 ep_num, u8 *buffer_ptr)
1556 {
1557         u32 temp;
1558         struct ep_queue_head *qh;
1559         struct fsl_usb2_platform_data *pdata = udc->pdata;
1560
1561         qh = &udc->ep_qh[ep_num * 2 + EP_DIR_OUT];
1562
1563         /* Clear bit in ENDPTSETUPSTAT */
1564         temp = fsl_readl(&dr_regs->endptsetupstat);
1565         fsl_writel(temp | (1 << ep_num), &dr_regs->endptsetupstat);
1566
1567         /* while a hazard exists when setup package arrives */
1568         do {
1569                 /* Set Setup Tripwire */
1570                 temp = fsl_readl(&dr_regs->usbcmd);
1571                 fsl_writel(temp | USB_CMD_SUTW, &dr_regs->usbcmd);
1572
1573                 /* Copy the setup packet to local buffer */
1574                 if (pdata->le_setup_buf) {
1575                         u32 *p = (u32 *)buffer_ptr;
1576                         u32 *s = (u32 *)qh->setup_buffer;
1577
1578                         /* Convert little endian setup buffer to CPU endian */
1579                         *p++ = le32_to_cpu(*s++);
1580                         *p = le32_to_cpu(*s);
1581                 } else {
1582                         memcpy(buffer_ptr, (u8 *) qh->setup_buffer, 8);
1583                 }
1584         } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_SUTW));
1585
1586         /* Clear Setup Tripwire */
1587         temp = fsl_readl(&dr_regs->usbcmd);
1588         fsl_writel(temp & ~USB_CMD_SUTW, &dr_regs->usbcmd);
1589 }
1590
1591 /* process-ep_req(): free the completed Tds for this req */
1592 static int process_ep_req(struct fsl_udc *udc, int pipe,
1593                 struct fsl_req *curr_req)
1594 {
1595         struct ep_td_struct *curr_td;
1596         int     td_complete, actual, remaining_length, j, tmp;
1597         int     status = 0;
1598         int     errors = 0;
1599         struct  ep_queue_head *curr_qh = &udc->ep_qh[pipe];
1600         int direction = pipe % 2;
1601
1602         curr_td = curr_req->head;
1603         td_complete = 0;
1604         actual = curr_req->req.length;
1605
1606         for (j = 0; j < curr_req->dtd_count; j++) {
1607                 remaining_length = (hc32_to_cpu(curr_td->size_ioc_sts)
1608                                         & DTD_PACKET_SIZE)
1609                                 >> DTD_LENGTH_BIT_POS;
1610                 actual -= remaining_length;
1611
1612                 errors = hc32_to_cpu(curr_td->size_ioc_sts);
1613                 if (errors & DTD_ERROR_MASK) {
1614                         if (errors & DTD_STATUS_HALTED) {
1615                                 ERR("dTD error %08x QH=%d\n", errors, pipe);
1616                                 /* Clear the errors and Halt condition */
1617                                 tmp = hc32_to_cpu(curr_qh->size_ioc_int_sts);
1618                                 tmp &= ~errors;
1619                                 curr_qh->size_ioc_int_sts = cpu_to_hc32(tmp);
1620                                 status = -EPIPE;
1621                                 /* FIXME: continue with next queued TD? */
1622
1623                                 break;
1624                         }
1625                         if (errors & DTD_STATUS_DATA_BUFF_ERR) {
1626                                 VDBG("Transfer overflow");
1627                                 status = -EPROTO;
1628                                 break;
1629                         } else if (errors & DTD_STATUS_TRANSACTION_ERR) {
1630                                 VDBG("ISO error");
1631                                 status = -EILSEQ;
1632                                 break;
1633                         } else
1634                                 ERR("Unknown error has occurred (0x%x)!\n",
1635                                         errors);
1636
1637                 } else if (hc32_to_cpu(curr_td->size_ioc_sts)
1638                                 & DTD_STATUS_ACTIVE) {
1639                         VDBG("Request not complete");
1640                         status = REQ_UNCOMPLETE;
1641                         return status;
1642                 } else if (remaining_length) {
1643                         if (direction) {
1644                                 VDBG("Transmit dTD remaining length not zero");
1645                                 status = -EPROTO;
1646                                 break;
1647                         } else {
1648                                 td_complete++;
1649                                 break;
1650                         }
1651                 } else {
1652                         td_complete++;
1653                         VDBG("dTD transmitted successful");
1654                 }
1655
1656                 if (j != curr_req->dtd_count - 1)
1657                         curr_td = (struct ep_td_struct *)curr_td->next_td_virt;
1658         }
1659
1660         if (status)
1661                 return status;
1662
1663         curr_req->req.actual = actual;
1664
1665         return 0;
1666 }
1667
1668 /* Process a DTD completion interrupt */
1669 static void dtd_complete_irq(struct fsl_udc *udc)
1670 {
1671         u32 bit_pos;
1672         int i, ep_num, direction, bit_mask, status;
1673         struct fsl_ep *curr_ep;
1674         struct fsl_req *curr_req, *temp_req;
1675
1676         /* Clear the bits in the register */
1677         bit_pos = fsl_readl(&dr_regs->endptcomplete);
1678         fsl_writel(bit_pos, &dr_regs->endptcomplete);
1679
1680         if (!bit_pos)
1681                 return;
1682
1683         for (i = 0; i < udc->max_ep; i++) {
1684                 ep_num = i >> 1;
1685                 direction = i % 2;
1686
1687                 bit_mask = 1 << (ep_num + 16 * direction);
1688
1689                 if (!(bit_pos & bit_mask))
1690                         continue;
1691
1692                 curr_ep = get_ep_by_pipe(udc, i);
1693
1694                 /* If the ep is configured */
1695                 if (curr_ep->name == NULL) {
1696                         WARNING("Invalid EP?");
1697                         continue;
1698                 }
1699
1700                 /* process the req queue until an uncomplete request */
1701                 list_for_each_entry_safe(curr_req, temp_req, &curr_ep->queue,
1702                                 queue) {
1703                         status = process_ep_req(udc, i, curr_req);
1704
1705                         VDBG("status of process_ep_req= %d, ep = %d",
1706                                         status, ep_num);
1707                         if (status == REQ_UNCOMPLETE)
1708                                 break;
1709                         /* write back status to req */
1710                         curr_req->req.status = status;
1711
1712                         if (ep_num == 0) {
1713                                 ep0_req_complete(udc, curr_ep, curr_req);
1714                                 break;
1715                         } else
1716                                 done(curr_ep, curr_req, status);
1717                 }
1718         }
1719 }
1720
1721 static inline enum usb_device_speed portscx_device_speed(u32 reg)
1722 {
1723         switch (reg & PORTSCX_PORT_SPEED_MASK) {
1724         case PORTSCX_PORT_SPEED_HIGH:
1725                 return USB_SPEED_HIGH;
1726         case PORTSCX_PORT_SPEED_FULL:
1727                 return USB_SPEED_FULL;
1728         case PORTSCX_PORT_SPEED_LOW:
1729                 return USB_SPEED_LOW;
1730         default:
1731                 return USB_SPEED_UNKNOWN;
1732         }
1733 }
1734
1735 /* Process a port change interrupt */
1736 static void port_change_irq(struct fsl_udc *udc)
1737 {
1738         if (udc->bus_reset)
1739                 udc->bus_reset = 0;
1740
1741         /* Bus resetting is finished */
1742         if (!(fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET))
1743                 /* Get the speed */
1744                 udc->gadget.speed =
1745                         portscx_device_speed(fsl_readl(&dr_regs->portsc1));
1746
1747         /* Update USB state */
1748         if (!udc->resume_state)
1749                 udc->usb_state = USB_STATE_DEFAULT;
1750 }
1751
1752 /* Process suspend interrupt */
1753 static void suspend_irq(struct fsl_udc *udc)
1754 {
1755         udc->resume_state = udc->usb_state;
1756         udc->usb_state = USB_STATE_SUSPENDED;
1757
1758         /* report suspend to the driver, serial.c does not support this */
1759         if (udc->driver->suspend)
1760                 udc->driver->suspend(&udc->gadget);
1761 }
1762
1763 static void bus_resume(struct fsl_udc *udc)
1764 {
1765         udc->usb_state = udc->resume_state;
1766         udc->resume_state = 0;
1767
1768         /* report resume to the driver, serial.c does not support this */
1769         if (udc->driver->resume)
1770                 udc->driver->resume(&udc->gadget);
1771 }
1772
1773 /* Clear up all ep queues */
1774 static int reset_queues(struct fsl_udc *udc, bool bus_reset)
1775 {
1776         u8 pipe;
1777
1778         for (pipe = 0; pipe < udc->max_pipes; pipe++)
1779                 udc_reset_ep_queue(udc, pipe);
1780
1781         /* report disconnect; the driver is already quiesced */
1782         spin_unlock(&udc->lock);
1783         if (bus_reset)
1784                 usb_gadget_udc_reset(&udc->gadget, udc->driver);
1785         else
1786                 udc->driver->disconnect(&udc->gadget);
1787         spin_lock(&udc->lock);
1788
1789         return 0;
1790 }
1791
1792 /* Process reset interrupt */
1793 static void reset_irq(struct fsl_udc *udc)
1794 {
1795         u32 temp;
1796         unsigned long timeout;
1797
1798         /* Clear the device address */
1799         temp = fsl_readl(&dr_regs->deviceaddr);
1800         fsl_writel(temp & ~USB_DEVICE_ADDRESS_MASK, &dr_regs->deviceaddr);
1801
1802         udc->device_address = 0;
1803
1804         /* Clear usb state */
1805         udc->resume_state = 0;
1806         udc->ep0_dir = 0;
1807         udc->ep0_state = WAIT_FOR_SETUP;
1808         udc->remote_wakeup = 0; /* default to 0 on reset */
1809         udc->gadget.b_hnp_enable = 0;
1810         udc->gadget.a_hnp_support = 0;
1811         udc->gadget.a_alt_hnp_support = 0;
1812
1813         /* Clear all the setup token semaphores */
1814         temp = fsl_readl(&dr_regs->endptsetupstat);
1815         fsl_writel(temp, &dr_regs->endptsetupstat);
1816
1817         /* Clear all the endpoint complete status bits */
1818         temp = fsl_readl(&dr_regs->endptcomplete);
1819         fsl_writel(temp, &dr_regs->endptcomplete);
1820
1821         timeout = jiffies + 100;
1822         while (fsl_readl(&dr_regs->endpointprime)) {
1823                 /* Wait until all endptprime bits cleared */
1824                 if (time_after(jiffies, timeout)) {
1825                         ERR("Timeout for reset\n");
1826                         break;
1827                 }
1828                 cpu_relax();
1829         }
1830
1831         /* Write 1s to the flush register */
1832         fsl_writel(0xffffffff, &dr_regs->endptflush);
1833
1834         if (fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET) {
1835                 VDBG("Bus reset");
1836                 /* Bus is reseting */
1837                 udc->bus_reset = 1;
1838                 /* Reset all the queues, include XD, dTD, EP queue
1839                  * head and TR Queue */
1840                 reset_queues(udc, true);
1841                 udc->usb_state = USB_STATE_DEFAULT;
1842         } else {
1843                 VDBG("Controller reset");
1844                 /* initialize usb hw reg except for regs for EP, not
1845                  * touch usbintr reg */
1846                 dr_controller_setup(udc);
1847
1848                 /* Reset all internal used Queues */
1849                 reset_queues(udc, false);
1850
1851                 ep0_setup(udc);
1852
1853                 /* Enable DR IRQ reg, Set Run bit, change udc state */
1854                 dr_controller_run(udc);
1855                 udc->usb_state = USB_STATE_ATTACHED;
1856         }
1857 }
1858
1859 /*
1860  * USB device controller interrupt handler
1861  */
1862 static irqreturn_t fsl_udc_irq(int irq, void *_udc)
1863 {
1864         struct fsl_udc *udc = _udc;
1865         u32 irq_src;
1866         irqreturn_t status = IRQ_NONE;
1867         unsigned long flags;
1868
1869         /* Disable ISR for OTG host mode */
1870         if (udc->stopped)
1871                 return IRQ_NONE;
1872         spin_lock_irqsave(&udc->lock, flags);
1873         irq_src = fsl_readl(&dr_regs->usbsts) & fsl_readl(&dr_regs->usbintr);
1874         /* Clear notification bits */
1875         fsl_writel(irq_src, &dr_regs->usbsts);
1876
1877         /* VDBG("irq_src [0x%8x]", irq_src); */
1878
1879         /* Need to resume? */
1880         if (udc->usb_state == USB_STATE_SUSPENDED)
1881                 if ((fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_SUSPEND) == 0)
1882                         bus_resume(udc);
1883
1884         /* USB Interrupt */
1885         if (irq_src & USB_STS_INT) {
1886                 VDBG("Packet int");
1887                 /* Setup package, we only support ep0 as control ep */
1888                 if (fsl_readl(&dr_regs->endptsetupstat) & EP_SETUP_STATUS_EP0) {
1889                         tripwire_handler(udc, 0,
1890                                         (u8 *) (&udc->local_setup_buff));
1891                         setup_received_irq(udc, &udc->local_setup_buff);
1892                         status = IRQ_HANDLED;
1893                 }
1894
1895                 /* completion of dtd */
1896                 if (fsl_readl(&dr_regs->endptcomplete)) {
1897                         dtd_complete_irq(udc);
1898                         status = IRQ_HANDLED;
1899                 }
1900         }
1901
1902         /* SOF (for ISO transfer) */
1903         if (irq_src & USB_STS_SOF) {
1904                 status = IRQ_HANDLED;
1905         }
1906
1907         /* Port Change */
1908         if (irq_src & USB_STS_PORT_CHANGE) {
1909                 port_change_irq(udc);
1910                 status = IRQ_HANDLED;
1911         }
1912
1913         /* Reset Received */
1914         if (irq_src & USB_STS_RESET) {
1915                 VDBG("reset int");
1916                 reset_irq(udc);
1917                 status = IRQ_HANDLED;
1918         }
1919
1920         /* Sleep Enable (Suspend) */
1921         if (irq_src & USB_STS_SUSPEND) {
1922                 suspend_irq(udc);
1923                 status = IRQ_HANDLED;
1924         }
1925
1926         if (irq_src & (USB_STS_ERR | USB_STS_SYS_ERR)) {
1927                 VDBG("Error IRQ %x", irq_src);
1928         }
1929
1930         spin_unlock_irqrestore(&udc->lock, flags);
1931         return status;
1932 }
1933
1934 /*----------------------------------------------------------------*
1935  * Hook to gadget drivers
1936  * Called by initialization code of gadget drivers
1937 *----------------------------------------------------------------*/
1938 static int fsl_udc_start(struct usb_gadget *g,
1939                 struct usb_gadget_driver *driver)
1940 {
1941         int retval = 0;
1942         unsigned long flags = 0;
1943
1944         /* lock is needed but whether should use this lock or another */
1945         spin_lock_irqsave(&udc_controller->lock, flags);
1946
1947         driver->driver.bus = NULL;
1948         /* hook up the driver */
1949         udc_controller->driver = driver;
1950         spin_unlock_irqrestore(&udc_controller->lock, flags);
1951         g->is_selfpowered = 1;
1952
1953         if (!IS_ERR_OR_NULL(udc_controller->transceiver)) {
1954                 /* Suspend the controller until OTG enable it */
1955                 udc_controller->stopped = 1;
1956                 printk(KERN_INFO "Suspend udc for OTG auto detect\n");
1957
1958                 /* connect to bus through transceiver */
1959                 if (!IS_ERR_OR_NULL(udc_controller->transceiver)) {
1960                         retval = otg_set_peripheral(
1961                                         udc_controller->transceiver->otg,
1962                                                     &udc_controller->gadget);
1963                         if (retval < 0) {
1964                                 ERR("can't bind to transceiver\n");
1965                                 udc_controller->driver = NULL;
1966                                 return retval;
1967                         }
1968                 }
1969         } else {
1970                 /* Enable DR IRQ reg and set USBCMD reg Run bit */
1971                 dr_controller_run(udc_controller);
1972                 udc_controller->usb_state = USB_STATE_ATTACHED;
1973                 udc_controller->ep0_state = WAIT_FOR_SETUP;
1974                 udc_controller->ep0_dir = 0;
1975         }
1976
1977         return retval;
1978 }
1979
1980 /* Disconnect from gadget driver */
1981 static int fsl_udc_stop(struct usb_gadget *g)
1982 {
1983         struct fsl_ep *loop_ep;
1984         unsigned long flags;
1985
1986         if (!IS_ERR_OR_NULL(udc_controller->transceiver))
1987                 otg_set_peripheral(udc_controller->transceiver->otg, NULL);
1988
1989         /* stop DR, disable intr */
1990         dr_controller_stop(udc_controller);
1991
1992         /* in fact, no needed */
1993         udc_controller->usb_state = USB_STATE_ATTACHED;
1994         udc_controller->ep0_state = WAIT_FOR_SETUP;
1995         udc_controller->ep0_dir = 0;
1996
1997         /* stand operation */
1998         spin_lock_irqsave(&udc_controller->lock, flags);
1999         udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2000         nuke(&udc_controller->eps[0], -ESHUTDOWN);
2001         list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
2002                         ep.ep_list)
2003                 nuke(loop_ep, -ESHUTDOWN);
2004         spin_unlock_irqrestore(&udc_controller->lock, flags);
2005
2006         udc_controller->driver = NULL;
2007
2008         return 0;
2009 }
2010
2011 /*-------------------------------------------------------------------------
2012                 PROC File System Support
2013 -------------------------------------------------------------------------*/
2014 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
2015
2016 #include <linux/seq_file.h>
2017
2018 static const char proc_filename[] = "driver/fsl_usb2_udc";
2019
2020 static int fsl_proc_read(struct seq_file *m, void *v)
2021 {
2022         unsigned long flags;
2023         int i;
2024         u32 tmp_reg;
2025         struct fsl_ep *ep = NULL;
2026         struct fsl_req *req;
2027
2028         struct fsl_udc *udc = udc_controller;
2029
2030         spin_lock_irqsave(&udc->lock, flags);
2031
2032         /* ------basic driver information ---- */
2033         seq_printf(m,
2034                         DRIVER_DESC "\n"
2035                         "%s version: %s\n"
2036                         "Gadget driver: %s\n\n",
2037                         driver_name, DRIVER_VERSION,
2038                         udc->driver ? udc->driver->driver.name : "(none)");
2039
2040         /* ------ DR Registers ----- */
2041         tmp_reg = fsl_readl(&dr_regs->usbcmd);
2042         seq_printf(m,
2043                         "USBCMD reg:\n"
2044                         "SetupTW: %d\n"
2045                         "Run/Stop: %s\n\n",
2046                         (tmp_reg & USB_CMD_SUTW) ? 1 : 0,
2047                         (tmp_reg & USB_CMD_RUN_STOP) ? "Run" : "Stop");
2048
2049         tmp_reg = fsl_readl(&dr_regs->usbsts);
2050         seq_printf(m,
2051                         "USB Status Reg:\n"
2052                         "Dr Suspend: %d Reset Received: %d System Error: %s "
2053                         "USB Error Interrupt: %s\n\n",
2054                         (tmp_reg & USB_STS_SUSPEND) ? 1 : 0,
2055                         (tmp_reg & USB_STS_RESET) ? 1 : 0,
2056                         (tmp_reg & USB_STS_SYS_ERR) ? "Err" : "Normal",
2057                         (tmp_reg & USB_STS_ERR) ? "Err detected" : "No err");
2058
2059         tmp_reg = fsl_readl(&dr_regs->usbintr);
2060         seq_printf(m,
2061                         "USB Interrupt Enable Reg:\n"
2062                         "Sleep Enable: %d SOF Received Enable: %d "
2063                         "Reset Enable: %d\n"
2064                         "System Error Enable: %d "
2065                         "Port Change Dectected Enable: %d\n"
2066                         "USB Error Intr Enable: %d USB Intr Enable: %d\n\n",
2067                         (tmp_reg & USB_INTR_DEVICE_SUSPEND) ? 1 : 0,
2068                         (tmp_reg & USB_INTR_SOF_EN) ? 1 : 0,
2069                         (tmp_reg & USB_INTR_RESET_EN) ? 1 : 0,
2070                         (tmp_reg & USB_INTR_SYS_ERR_EN) ? 1 : 0,
2071                         (tmp_reg & USB_INTR_PTC_DETECT_EN) ? 1 : 0,
2072                         (tmp_reg & USB_INTR_ERR_INT_EN) ? 1 : 0,
2073                         (tmp_reg & USB_INTR_INT_EN) ? 1 : 0);
2074
2075         tmp_reg = fsl_readl(&dr_regs->frindex);
2076         seq_printf(m,
2077                         "USB Frame Index Reg: Frame Number is 0x%x\n\n",
2078                         (tmp_reg & USB_FRINDEX_MASKS));
2079
2080         tmp_reg = fsl_readl(&dr_regs->deviceaddr);
2081         seq_printf(m,
2082                         "USB Device Address Reg: Device Addr is 0x%x\n\n",
2083                         (tmp_reg & USB_DEVICE_ADDRESS_MASK));
2084
2085         tmp_reg = fsl_readl(&dr_regs->endpointlistaddr);
2086         seq_printf(m,
2087                         "USB Endpoint List Address Reg: "
2088                         "Device Addr is 0x%x\n\n",
2089                         (tmp_reg & USB_EP_LIST_ADDRESS_MASK));
2090
2091         tmp_reg = fsl_readl(&dr_regs->portsc1);
2092         seq_printf(m,
2093                 "USB Port Status&Control Reg:\n"
2094                 "Port Transceiver Type : %s Port Speed: %s\n"
2095                 "PHY Low Power Suspend: %s Port Reset: %s "
2096                 "Port Suspend Mode: %s\n"
2097                 "Over-current Change: %s "
2098                 "Port Enable/Disable Change: %s\n"
2099                 "Port Enabled/Disabled: %s "
2100                 "Current Connect Status: %s\n\n", ( {
2101                         const char *s;
2102                         switch (tmp_reg & PORTSCX_PTS_FSLS) {
2103                         case PORTSCX_PTS_UTMI:
2104                                 s = "UTMI"; break;
2105                         case PORTSCX_PTS_ULPI:
2106                                 s = "ULPI "; break;
2107                         case PORTSCX_PTS_FSLS:
2108                                 s = "FS/LS Serial"; break;
2109                         default:
2110                                 s = "None"; break;
2111                         }
2112                         s;} ),
2113                 usb_speed_string(portscx_device_speed(tmp_reg)),
2114                 (tmp_reg & PORTSCX_PHY_LOW_POWER_SPD) ?
2115                 "Normal PHY mode" : "Low power mode",
2116                 (tmp_reg & PORTSCX_PORT_RESET) ? "In Reset" :
2117                 "Not in Reset",
2118                 (tmp_reg & PORTSCX_PORT_SUSPEND) ? "In " : "Not in",
2119                 (tmp_reg & PORTSCX_OVER_CURRENT_CHG) ? "Dected" :
2120                 "No",
2121                 (tmp_reg & PORTSCX_PORT_EN_DIS_CHANGE) ? "Disable" :
2122                 "Not change",
2123                 (tmp_reg & PORTSCX_PORT_ENABLE) ? "Enable" :
2124                 "Not correct",
2125                 (tmp_reg & PORTSCX_CURRENT_CONNECT_STATUS) ?
2126                 "Attached" : "Not-Att");
2127
2128         tmp_reg = fsl_readl(&dr_regs->usbmode);
2129         seq_printf(m,
2130                         "USB Mode Reg: Controller Mode is: %s\n\n", ( {
2131                                 const char *s;
2132                                 switch (tmp_reg & USB_MODE_CTRL_MODE_HOST) {
2133                                 case USB_MODE_CTRL_MODE_IDLE:
2134                                         s = "Idle"; break;
2135                                 case USB_MODE_CTRL_MODE_DEVICE:
2136                                         s = "Device Controller"; break;
2137                                 case USB_MODE_CTRL_MODE_HOST:
2138                                         s = "Host Controller"; break;
2139                                 default:
2140                                         s = "None"; break;
2141                                 }
2142                                 s;
2143                         } ));
2144
2145         tmp_reg = fsl_readl(&dr_regs->endptsetupstat);
2146         seq_printf(m,
2147                         "Endpoint Setup Status Reg: SETUP on ep 0x%x\n\n",
2148                         (tmp_reg & EP_SETUP_STATUS_MASK));
2149
2150         for (i = 0; i < udc->max_ep / 2; i++) {
2151                 tmp_reg = fsl_readl(&dr_regs->endptctrl[i]);
2152                 seq_printf(m, "EP Ctrl Reg [0x%x]: = [0x%x]\n", i, tmp_reg);
2153         }
2154         tmp_reg = fsl_readl(&dr_regs->endpointprime);
2155         seq_printf(m, "EP Prime Reg = [0x%x]\n\n", tmp_reg);
2156
2157 #ifndef CONFIG_ARCH_MXC
2158         if (udc->pdata->have_sysif_regs) {
2159                 tmp_reg = usb_sys_regs->snoop1;
2160                 seq_printf(m, "Snoop1 Reg : = [0x%x]\n\n", tmp_reg);
2161
2162                 tmp_reg = usb_sys_regs->control;
2163                 seq_printf(m, "General Control Reg : = [0x%x]\n\n", tmp_reg);
2164         }
2165 #endif
2166
2167         /* ------fsl_udc, fsl_ep, fsl_request structure information ----- */
2168         ep = &udc->eps[0];
2169         seq_printf(m, "For %s Maxpkt is 0x%x index is 0x%x\n",
2170                         ep->ep.name, ep_maxpacket(ep), ep_index(ep));
2171
2172         if (list_empty(&ep->queue)) {
2173                 seq_puts(m, "its req queue is empty\n\n");
2174         } else {
2175                 list_for_each_entry(req, &ep->queue, queue) {
2176                         seq_printf(m,
2177                                 "req %p actual 0x%x length 0x%x buf %p\n",
2178                                 &req->req, req->req.actual,
2179                                 req->req.length, req->req.buf);
2180                 }
2181         }
2182         /* other gadget->eplist ep */
2183         list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
2184                 if (ep->ep.desc) {
2185                         seq_printf(m,
2186                                         "\nFor %s Maxpkt is 0x%x "
2187                                         "index is 0x%x\n",
2188                                         ep->ep.name, ep_maxpacket(ep),
2189                                         ep_index(ep));
2190
2191                         if (list_empty(&ep->queue)) {
2192                                 seq_puts(m, "its req queue is empty\n\n");
2193                         } else {
2194                                 list_for_each_entry(req, &ep->queue, queue) {
2195                                         seq_printf(m,
2196                                                 "req %p actual 0x%x length "
2197                                                 "0x%x  buf %p\n",
2198                                                 &req->req, req->req.actual,
2199                                                 req->req.length, req->req.buf);
2200                                 }       /* end for each_entry of ep req */
2201                         }       /* end for else */
2202                 }       /* end for if(ep->queue) */
2203         }       /* end (ep->desc) */
2204
2205         spin_unlock_irqrestore(&udc->lock, flags);
2206         return 0;
2207 }
2208
2209 /*
2210  * seq_file wrappers for procfile show routines.
2211  */
2212 static int fsl_proc_open(struct inode *inode, struct file *file)
2213 {
2214         return single_open(file, fsl_proc_read, NULL);
2215 }
2216
2217 static const struct file_operations fsl_proc_fops = {
2218         .open           = fsl_proc_open,
2219         .read           = seq_read,
2220         .llseek         = seq_lseek,
2221         .release        = single_release,
2222 };
2223
2224 #define create_proc_file()      proc_create(proc_filename, 0, NULL, &fsl_proc_fops)
2225 #define remove_proc_file()      remove_proc_entry(proc_filename, NULL)
2226
2227 #else                           /* !CONFIG_USB_GADGET_DEBUG_FILES */
2228
2229 #define create_proc_file()      do {} while (0)
2230 #define remove_proc_file()      do {} while (0)
2231
2232 #endif                          /* CONFIG_USB_GADGET_DEBUG_FILES */
2233
2234 /*-------------------------------------------------------------------------*/
2235
2236 /* Release udc structures */
2237 static void fsl_udc_release(struct device *dev)
2238 {
2239         complete(udc_controller->done);
2240         dma_free_coherent(dev->parent, udc_controller->ep_qh_size,
2241                         udc_controller->ep_qh, udc_controller->ep_qh_dma);
2242         kfree(udc_controller);
2243 }
2244
2245 /******************************************************************
2246         Internal structure setup functions
2247 *******************************************************************/
2248 /*------------------------------------------------------------------
2249  * init resource for globle controller
2250  * Return the udc handle on success or NULL on failure
2251  ------------------------------------------------------------------*/
2252 static int struct_udc_setup(struct fsl_udc *udc,
2253                 struct platform_device *pdev)
2254 {
2255         struct fsl_usb2_platform_data *pdata;
2256         size_t size;
2257
2258         pdata = dev_get_platdata(&pdev->dev);
2259         udc->phy_mode = pdata->phy_mode;
2260
2261         udc->eps = kzalloc(sizeof(struct fsl_ep) * udc->max_ep, GFP_KERNEL);
2262         if (!udc->eps)
2263                 return -1;
2264
2265         /* initialized QHs, take care of alignment */
2266         size = udc->max_ep * sizeof(struct ep_queue_head);
2267         if (size < QH_ALIGNMENT)
2268                 size = QH_ALIGNMENT;
2269         else if ((size % QH_ALIGNMENT) != 0) {
2270                 size += QH_ALIGNMENT + 1;
2271                 size &= ~(QH_ALIGNMENT - 1);
2272         }
2273         udc->ep_qh = dma_alloc_coherent(&pdev->dev, size,
2274                                         &udc->ep_qh_dma, GFP_KERNEL);
2275         if (!udc->ep_qh) {
2276                 ERR("malloc QHs for udc failed\n");
2277                 kfree(udc->eps);
2278                 return -1;
2279         }
2280
2281         udc->ep_qh_size = size;
2282
2283         /* Initialize ep0 status request structure */
2284         /* FIXME: fsl_alloc_request() ignores ep argument */
2285         udc->status_req = container_of(fsl_alloc_request(NULL, GFP_KERNEL),
2286                         struct fsl_req, req);
2287         /* allocate a small amount of memory to get valid address */
2288         udc->status_req->req.buf = kmalloc(8, GFP_KERNEL);
2289
2290         udc->resume_state = USB_STATE_NOTATTACHED;
2291         udc->usb_state = USB_STATE_POWERED;
2292         udc->ep0_dir = 0;
2293         udc->remote_wakeup = 0; /* default to 0 on reset */
2294
2295         return 0;
2296 }
2297
2298 /*----------------------------------------------------------------
2299  * Setup the fsl_ep struct for eps
2300  * Link fsl_ep->ep to gadget->ep_list
2301  * ep0out is not used so do nothing here
2302  * ep0in should be taken care
2303  *--------------------------------------------------------------*/
2304 static int struct_ep_setup(struct fsl_udc *udc, unsigned char index,
2305                 char *name, int link)
2306 {
2307         struct fsl_ep *ep = &udc->eps[index];
2308
2309         ep->udc = udc;
2310         strcpy(ep->name, name);
2311         ep->ep.name = ep->name;
2312
2313         ep->ep.ops = &fsl_ep_ops;
2314         ep->stopped = 0;
2315
2316         /* for ep0: maxP defined in desc
2317          * for other eps, maxP is set by epautoconfig() called by gadget layer
2318          */
2319         usb_ep_set_maxpacket_limit(&ep->ep, (unsigned short) ~0);
2320
2321         /* the queue lists any req for this ep */
2322         INIT_LIST_HEAD(&ep->queue);
2323
2324         /* gagdet.ep_list used for ep_autoconfig so no ep0 */
2325         if (link)
2326                 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2327         ep->gadget = &udc->gadget;
2328         ep->qh = &udc->ep_qh[index];
2329
2330         return 0;
2331 }
2332
2333 /* Driver probe function
2334  * all intialization operations implemented here except enabling usb_intr reg
2335  * board setup should have been done in the platform code
2336  */
2337 static int fsl_udc_probe(struct platform_device *pdev)
2338 {
2339         struct fsl_usb2_platform_data *pdata;
2340         struct resource *res;
2341         int ret = -ENODEV;
2342         unsigned int i;
2343         u32 dccparams;
2344
2345         udc_controller = kzalloc(sizeof(struct fsl_udc), GFP_KERNEL);
2346         if (udc_controller == NULL)
2347                 return -ENOMEM;
2348
2349         pdata = dev_get_platdata(&pdev->dev);
2350         udc_controller->pdata = pdata;
2351         spin_lock_init(&udc_controller->lock);
2352         udc_controller->stopped = 1;
2353
2354 #ifdef CONFIG_USB_OTG
2355         if (pdata->operating_mode == FSL_USB2_DR_OTG) {
2356                 udc_controller->transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
2357                 if (IS_ERR_OR_NULL(udc_controller->transceiver)) {
2358                         ERR("Can't find OTG driver!\n");
2359                         ret = -ENODEV;
2360                         goto err_kfree;
2361                 }
2362         }
2363 #endif
2364
2365         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2366         if (!res) {
2367                 ret = -ENXIO;
2368                 goto err_kfree;
2369         }
2370
2371         if (pdata->operating_mode == FSL_USB2_DR_DEVICE) {
2372                 if (!request_mem_region(res->start, resource_size(res),
2373                                         driver_name)) {
2374                         ERR("request mem region for %s failed\n", pdev->name);
2375                         ret = -EBUSY;
2376                         goto err_kfree;
2377                 }
2378         }
2379
2380         dr_regs = ioremap(res->start, resource_size(res));
2381         if (!dr_regs) {
2382                 ret = -ENOMEM;
2383                 goto err_release_mem_region;
2384         }
2385
2386         pdata->regs = (void __iomem *)dr_regs;
2387
2388         /*
2389          * do platform specific init: check the clock, grab/config pins, etc.
2390          */
2391         if (pdata->init && pdata->init(pdev)) {
2392                 ret = -ENODEV;
2393                 goto err_iounmap_noclk;
2394         }
2395
2396         /* Set accessors only after pdata->init() ! */
2397         fsl_set_accessors(pdata);
2398
2399 #ifndef CONFIG_ARCH_MXC
2400         if (pdata->have_sysif_regs)
2401                 usb_sys_regs = (void *)dr_regs + USB_DR_SYS_OFFSET;
2402 #endif
2403
2404         /* Initialize USB clocks */
2405         ret = fsl_udc_clk_init(pdev);
2406         if (ret < 0)
2407                 goto err_iounmap_noclk;
2408
2409         /* Read Device Controller Capability Parameters register */
2410         dccparams = fsl_readl(&dr_regs->dccparams);
2411         if (!(dccparams & DCCPARAMS_DC)) {
2412                 ERR("This SOC doesn't support device role\n");
2413                 ret = -ENODEV;
2414                 goto err_iounmap;
2415         }
2416         /* Get max device endpoints */
2417         /* DEN is bidirectional ep number, max_ep doubles the number */
2418         udc_controller->max_ep = (dccparams & DCCPARAMS_DEN_MASK) * 2;
2419
2420         udc_controller->irq = platform_get_irq(pdev, 0);
2421         if (!udc_controller->irq) {
2422                 ret = -ENODEV;
2423                 goto err_iounmap;
2424         }
2425
2426         ret = request_irq(udc_controller->irq, fsl_udc_irq, IRQF_SHARED,
2427                         driver_name, udc_controller);
2428         if (ret != 0) {
2429                 ERR("cannot request irq %d err %d\n",
2430                                 udc_controller->irq, ret);
2431                 goto err_iounmap;
2432         }
2433
2434         /* Initialize the udc structure including QH member and other member */
2435         if (struct_udc_setup(udc_controller, pdev)) {
2436                 ERR("Can't initialize udc data structure\n");
2437                 ret = -ENOMEM;
2438                 goto err_free_irq;
2439         }
2440
2441         if (IS_ERR_OR_NULL(udc_controller->transceiver)) {
2442                 /* initialize usb hw reg except for regs for EP,
2443                  * leave usbintr reg untouched */
2444                 dr_controller_setup(udc_controller);
2445         }
2446
2447         ret = fsl_udc_clk_finalize(pdev);
2448         if (ret)
2449                 goto err_free_irq;
2450
2451         /* Setup gadget structure */
2452         udc_controller->gadget.ops = &fsl_gadget_ops;
2453         udc_controller->gadget.max_speed = USB_SPEED_HIGH;
2454         udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
2455         INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
2456         udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2457         udc_controller->gadget.name = driver_name;
2458
2459         /* Setup gadget.dev and register with kernel */
2460         dev_set_name(&udc_controller->gadget.dev, "gadget");
2461         udc_controller->gadget.dev.of_node = pdev->dev.of_node;
2462
2463         if (!IS_ERR_OR_NULL(udc_controller->transceiver))
2464                 udc_controller->gadget.is_otg = 1;
2465
2466         /* setup QH and epctrl for ep0 */
2467         ep0_setup(udc_controller);
2468
2469         /* setup udc->eps[] for ep0 */
2470         struct_ep_setup(udc_controller, 0, "ep0", 0);
2471         /* for ep0: the desc defined here;
2472          * for other eps, gadget layer called ep_enable with defined desc
2473          */
2474         udc_controller->eps[0].ep.desc = &fsl_ep0_desc;
2475         usb_ep_set_maxpacket_limit(&udc_controller->eps[0].ep,
2476                                    USB_MAX_CTRL_PAYLOAD);
2477
2478         /* setup the udc->eps[] for non-control endpoints and link
2479          * to gadget.ep_list */
2480         for (i = 1; i < (int)(udc_controller->max_ep / 2); i++) {
2481                 char name[14];
2482
2483                 sprintf(name, "ep%dout", i);
2484                 struct_ep_setup(udc_controller, i * 2, name, 1);
2485                 sprintf(name, "ep%din", i);
2486                 struct_ep_setup(udc_controller, i * 2 + 1, name, 1);
2487         }
2488
2489         /* use dma_pool for TD management */
2490         udc_controller->td_pool = dma_pool_create("udc_td", &pdev->dev,
2491                         sizeof(struct ep_td_struct),
2492                         DTD_ALIGNMENT, UDC_DMA_BOUNDARY);
2493         if (udc_controller->td_pool == NULL) {
2494                 ret = -ENOMEM;
2495                 goto err_free_irq;
2496         }
2497
2498         ret = usb_add_gadget_udc_release(&pdev->dev, &udc_controller->gadget,
2499                         fsl_udc_release);
2500         if (ret)
2501                 goto err_del_udc;
2502
2503         create_proc_file();
2504         return 0;
2505
2506 err_del_udc:
2507         dma_pool_destroy(udc_controller->td_pool);
2508 err_free_irq:
2509         free_irq(udc_controller->irq, udc_controller);
2510 err_iounmap:
2511         if (pdata->exit)
2512                 pdata->exit(pdev);
2513         fsl_udc_clk_release();
2514 err_iounmap_noclk:
2515         iounmap(dr_regs);
2516 err_release_mem_region:
2517         if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
2518                 release_mem_region(res->start, resource_size(res));
2519 err_kfree:
2520         kfree(udc_controller);
2521         udc_controller = NULL;
2522         return ret;
2523 }
2524
2525 /* Driver removal function
2526  * Free resources and finish pending transactions
2527  */
2528 static int fsl_udc_remove(struct platform_device *pdev)
2529 {
2530         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2531         struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
2532
2533         DECLARE_COMPLETION_ONSTACK(done);
2534
2535         if (!udc_controller)
2536                 return -ENODEV;
2537
2538         udc_controller->done = &done;
2539         usb_del_gadget_udc(&udc_controller->gadget);
2540
2541         fsl_udc_clk_release();
2542
2543         /* DR has been stopped in usb_gadget_unregister_driver() */
2544         remove_proc_file();
2545
2546         /* Free allocated memory */
2547         kfree(udc_controller->status_req->req.buf);
2548         kfree(udc_controller->status_req);
2549         kfree(udc_controller->eps);
2550
2551         dma_pool_destroy(udc_controller->td_pool);
2552         free_irq(udc_controller->irq, udc_controller);
2553         iounmap(dr_regs);
2554         if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
2555                 release_mem_region(res->start, resource_size(res));
2556
2557         /* free udc --wait for the release() finished */
2558         wait_for_completion(&done);
2559
2560         /*
2561          * do platform specific un-initialization:
2562          * release iomux pins, etc.
2563          */
2564         if (pdata->exit)
2565                 pdata->exit(pdev);
2566
2567         return 0;
2568 }
2569
2570 /*-----------------------------------------------------------------
2571  * Modify Power management attributes
2572  * Used by OTG statemachine to disable gadget temporarily
2573  -----------------------------------------------------------------*/
2574 static int fsl_udc_suspend(struct platform_device *pdev, pm_message_t state)
2575 {
2576         dr_controller_stop(udc_controller);
2577         return 0;
2578 }
2579
2580 /*-----------------------------------------------------------------
2581  * Invoked on USB resume. May be called in_interrupt.
2582  * Here we start the DR controller and enable the irq
2583  *-----------------------------------------------------------------*/
2584 static int fsl_udc_resume(struct platform_device *pdev)
2585 {
2586         /* Enable DR irq reg and set controller Run */
2587         if (udc_controller->stopped) {
2588                 dr_controller_setup(udc_controller);
2589                 dr_controller_run(udc_controller);
2590         }
2591         udc_controller->usb_state = USB_STATE_ATTACHED;
2592         udc_controller->ep0_state = WAIT_FOR_SETUP;
2593         udc_controller->ep0_dir = 0;
2594         return 0;
2595 }
2596
2597 static int fsl_udc_otg_suspend(struct device *dev, pm_message_t state)
2598 {
2599         struct fsl_udc *udc = udc_controller;
2600         u32 mode, usbcmd;
2601
2602         mode = fsl_readl(&dr_regs->usbmode) & USB_MODE_CTRL_MODE_MASK;
2603
2604         pr_debug("%s(): mode 0x%x stopped %d\n", __func__, mode, udc->stopped);
2605
2606         /*
2607          * If the controller is already stopped, then this must be a
2608          * PM suspend.  Remember this fact, so that we will leave the
2609          * controller stopped at PM resume time.
2610          */
2611         if (udc->stopped) {
2612                 pr_debug("gadget already stopped, leaving early\n");
2613                 udc->already_stopped = 1;
2614                 return 0;
2615         }
2616
2617         if (mode != USB_MODE_CTRL_MODE_DEVICE) {
2618                 pr_debug("gadget not in device mode, leaving early\n");
2619                 return 0;
2620         }
2621
2622         /* stop the controller */
2623         usbcmd = fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP;
2624         fsl_writel(usbcmd, &dr_regs->usbcmd);
2625
2626         udc->stopped = 1;
2627
2628         pr_info("USB Gadget suspended\n");
2629
2630         return 0;
2631 }
2632
2633 static int fsl_udc_otg_resume(struct device *dev)
2634 {
2635         pr_debug("%s(): stopped %d  already_stopped %d\n", __func__,
2636                  udc_controller->stopped, udc_controller->already_stopped);
2637
2638         /*
2639          * If the controller was stopped at suspend time, then
2640          * don't resume it now.
2641          */
2642         if (udc_controller->already_stopped) {
2643                 udc_controller->already_stopped = 0;
2644                 pr_debug("gadget was already stopped, leaving early\n");
2645                 return 0;
2646         }
2647
2648         pr_info("USB Gadget resume\n");
2649
2650         return fsl_udc_resume(NULL);
2651 }
2652 /*-------------------------------------------------------------------------
2653         Register entry point for the peripheral controller driver
2654 --------------------------------------------------------------------------*/
2655 static const struct platform_device_id fsl_udc_devtype[] = {
2656         {
2657                 .name = "imx-udc-mx27",
2658         }, {
2659                 .name = "imx-udc-mx51",
2660         }, {
2661                 /* sentinel */
2662         }
2663 };
2664 MODULE_DEVICE_TABLE(platform, fsl_udc_devtype);
2665 static struct platform_driver udc_driver = {
2666         .remove         = fsl_udc_remove,
2667         /* Just for FSL i.mx SoC currently */
2668         .id_table       = fsl_udc_devtype,
2669         /* these suspend and resume are not usb suspend and resume */
2670         .suspend        = fsl_udc_suspend,
2671         .resume         = fsl_udc_resume,
2672         .driver         = {
2673                         .name = driver_name,
2674                         /* udc suspend/resume called from OTG driver */
2675                         .suspend = fsl_udc_otg_suspend,
2676                         .resume  = fsl_udc_otg_resume,
2677         },
2678 };
2679
2680 module_platform_driver_probe(udc_driver, fsl_udc_probe);
2681
2682 MODULE_DESCRIPTION(DRIVER_DESC);
2683 MODULE_AUTHOR(DRIVER_AUTHOR);
2684 MODULE_LICENSE("GPL");
2685 MODULE_ALIAS("platform:fsl-usb2-udc");