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 /*
1253  * Empty complete function used by this driver to fill in the req->complete
1254  * field when creating a request since the complete field is mandatory.
1255  */
1256 static void fsl_noop_complete(struct usb_ep *ep, struct usb_request *req) { }
1257
1258 /* Set protocol stall on ep0, protocol stall will automatically be cleared
1259    on new transaction */
1260 static void ep0stall(struct fsl_udc *udc)
1261 {
1262         u32 tmp;
1263
1264         /* must set tx and rx to stall at the same time */
1265         tmp = fsl_readl(&dr_regs->endptctrl[0]);
1266         tmp |= EPCTRL_TX_EP_STALL | EPCTRL_RX_EP_STALL;
1267         fsl_writel(tmp, &dr_regs->endptctrl[0]);
1268         udc->ep0_state = WAIT_FOR_SETUP;
1269         udc->ep0_dir = 0;
1270 }
1271
1272 /* Prime a status phase for ep0 */
1273 static int ep0_prime_status(struct fsl_udc *udc, int direction)
1274 {
1275         struct fsl_req *req = udc->status_req;
1276         struct fsl_ep *ep;
1277         int ret;
1278
1279         if (direction == EP_DIR_IN)
1280                 udc->ep0_dir = USB_DIR_IN;
1281         else
1282                 udc->ep0_dir = USB_DIR_OUT;
1283
1284         ep = &udc->eps[0];
1285         if (udc->ep0_state != DATA_STATE_XMIT)
1286                 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1287
1288         req->ep = ep;
1289         req->req.length = 0;
1290         req->req.status = -EINPROGRESS;
1291         req->req.actual = 0;
1292         req->req.complete = fsl_noop_complete;
1293         req->dtd_count = 0;
1294
1295         ret = usb_gadget_map_request(&ep->udc->gadget, &req->req, ep_is_in(ep));
1296         if (ret)
1297                 return ret;
1298
1299         if (fsl_req_to_dtd(req, GFP_ATOMIC) == 0)
1300                 fsl_queue_td(ep, req);
1301         else
1302                 return -ENOMEM;
1303
1304         list_add_tail(&req->queue, &ep->queue);
1305
1306         return 0;
1307 }
1308
1309 static void udc_reset_ep_queue(struct fsl_udc *udc, u8 pipe)
1310 {
1311         struct fsl_ep *ep = get_ep_by_pipe(udc, pipe);
1312
1313         if (ep->ep.name)
1314                 nuke(ep, -ESHUTDOWN);
1315 }
1316
1317 /*
1318  * ch9 Set address
1319  */
1320 static void ch9setaddress(struct fsl_udc *udc, u16 value, u16 index, u16 length)
1321 {
1322         /* Save the new address to device struct */
1323         udc->device_address = (u8) value;
1324         /* Update usb state */
1325         udc->usb_state = USB_STATE_ADDRESS;
1326         /* Status phase */
1327         if (ep0_prime_status(udc, EP_DIR_IN))
1328                 ep0stall(udc);
1329 }
1330
1331 /*
1332  * ch9 Get status
1333  */
1334 static void ch9getstatus(struct fsl_udc *udc, u8 request_type, u16 value,
1335                 u16 index, u16 length)
1336 {
1337         u16 tmp = 0;            /* Status, cpu endian */
1338         struct fsl_req *req;
1339         struct fsl_ep *ep;
1340         int ret;
1341
1342         ep = &udc->eps[0];
1343
1344         if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1345                 /* Get device status */
1346                 tmp = udc->gadget.is_selfpowered;
1347                 tmp |= udc->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP;
1348         } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
1349                 /* Get interface status */
1350                 /* We don't have interface information in udc driver */
1351                 tmp = 0;
1352         } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
1353                 /* Get endpoint status */
1354                 struct fsl_ep *target_ep;
1355
1356                 target_ep = get_ep_by_pipe(udc, get_pipe_by_windex(index));
1357
1358                 /* stall if endpoint doesn't exist */
1359                 if (!target_ep->ep.desc)
1360                         goto stall;
1361                 tmp = dr_ep_get_stall(ep_index(target_ep), ep_is_in(target_ep))
1362                                 << USB_ENDPOINT_HALT;
1363         }
1364
1365         udc->ep0_dir = USB_DIR_IN;
1366         /* Borrow the per device status_req */
1367         req = udc->status_req;
1368         /* Fill in the reqest structure */
1369         *((u16 *) req->req.buf) = cpu_to_le16(tmp);
1370
1371         req->ep = ep;
1372         req->req.length = 2;
1373         req->req.status = -EINPROGRESS;
1374         req->req.actual = 0;
1375         req->req.complete = fsl_noop_complete;
1376         req->dtd_count = 0;
1377
1378         ret = usb_gadget_map_request(&ep->udc->gadget, &req->req, ep_is_in(ep));
1379         if (ret)
1380                 goto stall;
1381
1382         /* prime the data phase */
1383         if ((fsl_req_to_dtd(req, GFP_ATOMIC) == 0))
1384                 fsl_queue_td(ep, req);
1385         else                    /* no mem */
1386                 goto stall;
1387
1388         list_add_tail(&req->queue, &ep->queue);
1389         udc->ep0_state = DATA_STATE_XMIT;
1390         if (ep0_prime_status(udc, EP_DIR_OUT))
1391                 ep0stall(udc);
1392
1393         return;
1394 stall:
1395         ep0stall(udc);
1396 }
1397
1398 static void setup_received_irq(struct fsl_udc *udc,
1399                 struct usb_ctrlrequest *setup)
1400 __releases(udc->lock)
1401 __acquires(udc->lock)
1402 {
1403         u16 wValue = le16_to_cpu(setup->wValue);
1404         u16 wIndex = le16_to_cpu(setup->wIndex);
1405         u16 wLength = le16_to_cpu(setup->wLength);
1406
1407         udc_reset_ep_queue(udc, 0);
1408
1409         /* We process some stardard setup requests here */
1410         switch (setup->bRequest) {
1411         case USB_REQ_GET_STATUS:
1412                 /* Data+Status phase from udc */
1413                 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
1414                                         != (USB_DIR_IN | USB_TYPE_STANDARD))
1415                         break;
1416                 ch9getstatus(udc, setup->bRequestType, wValue, wIndex, wLength);
1417                 return;
1418
1419         case USB_REQ_SET_ADDRESS:
1420                 /* Status phase from udc */
1421                 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD
1422                                                 | USB_RECIP_DEVICE))
1423                         break;
1424                 ch9setaddress(udc, wValue, wIndex, wLength);
1425                 return;
1426
1427         case USB_REQ_CLEAR_FEATURE:
1428         case USB_REQ_SET_FEATURE:
1429                 /* Status phase from udc */
1430         {
1431                 int rc = -EOPNOTSUPP;
1432                 u16 ptc = 0;
1433
1434                 if ((setup->bRequestType & (USB_RECIP_MASK | USB_TYPE_MASK))
1435                                 == (USB_RECIP_ENDPOINT | USB_TYPE_STANDARD)) {
1436                         int pipe = get_pipe_by_windex(wIndex);
1437                         struct fsl_ep *ep;
1438
1439                         if (wValue != 0 || wLength != 0 || pipe >= udc->max_ep)
1440                                 break;
1441                         ep = get_ep_by_pipe(udc, pipe);
1442
1443                         spin_unlock(&udc->lock);
1444                         rc = fsl_ep_set_halt(&ep->ep,
1445                                         (setup->bRequest == USB_REQ_SET_FEATURE)
1446                                                 ? 1 : 0);
1447                         spin_lock(&udc->lock);
1448
1449                 } else if ((setup->bRequestType & (USB_RECIP_MASK
1450                                 | USB_TYPE_MASK)) == (USB_RECIP_DEVICE
1451                                 | USB_TYPE_STANDARD)) {
1452                         /* Note: The driver has not include OTG support yet.
1453                          * This will be set when OTG support is added */
1454                         if (wValue == USB_DEVICE_TEST_MODE)
1455                                 ptc = wIndex >> 8;
1456                         else if (gadget_is_otg(&udc->gadget)) {
1457                                 if (setup->bRequest ==
1458                                     USB_DEVICE_B_HNP_ENABLE)
1459                                         udc->gadget.b_hnp_enable = 1;
1460                                 else if (setup->bRequest ==
1461                                          USB_DEVICE_A_HNP_SUPPORT)
1462                                         udc->gadget.a_hnp_support = 1;
1463                                 else if (setup->bRequest ==
1464                                          USB_DEVICE_A_ALT_HNP_SUPPORT)
1465                                         udc->gadget.a_alt_hnp_support = 1;
1466                         }
1467                         rc = 0;
1468                 } else
1469                         break;
1470
1471                 if (rc == 0) {
1472                         if (ep0_prime_status(udc, EP_DIR_IN))
1473                                 ep0stall(udc);
1474                 }
1475                 if (ptc) {
1476                         u32 tmp;
1477
1478                         mdelay(10);
1479                         tmp = fsl_readl(&dr_regs->portsc1) | (ptc << 16);
1480                         fsl_writel(tmp, &dr_regs->portsc1);
1481                         printk(KERN_INFO "udc: switch to test mode %d.\n", ptc);
1482                 }
1483
1484                 return;
1485         }
1486
1487         default:
1488                 break;
1489         }
1490
1491         /* Requests handled by gadget */
1492         if (wLength) {
1493                 /* Data phase from gadget, status phase from udc */
1494                 udc->ep0_dir = (setup->bRequestType & USB_DIR_IN)
1495                                 ?  USB_DIR_IN : USB_DIR_OUT;
1496                 spin_unlock(&udc->lock);
1497                 if (udc->driver->setup(&udc->gadget,
1498                                 &udc->local_setup_buff) < 0)
1499                         ep0stall(udc);
1500                 spin_lock(&udc->lock);
1501                 udc->ep0_state = (setup->bRequestType & USB_DIR_IN)
1502                                 ?  DATA_STATE_XMIT : DATA_STATE_RECV;
1503                 /*
1504                  * If the data stage is IN, send status prime immediately.
1505                  * See 2.0 Spec chapter 8.5.3.3 for detail.
1506                  */
1507                 if (udc->ep0_state == DATA_STATE_XMIT)
1508                         if (ep0_prime_status(udc, EP_DIR_OUT))
1509                                 ep0stall(udc);
1510
1511         } else {
1512                 /* No data phase, IN status from gadget */
1513                 udc->ep0_dir = USB_DIR_IN;
1514                 spin_unlock(&udc->lock);
1515                 if (udc->driver->setup(&udc->gadget,
1516                                 &udc->local_setup_buff) < 0)
1517                         ep0stall(udc);
1518                 spin_lock(&udc->lock);
1519                 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1520         }
1521 }
1522
1523 /* Process request for Data or Status phase of ep0
1524  * prime status phase if needed */
1525 static void ep0_req_complete(struct fsl_udc *udc, struct fsl_ep *ep0,
1526                 struct fsl_req *req)
1527 {
1528         if (udc->usb_state == USB_STATE_ADDRESS) {
1529                 /* Set the new address */
1530                 u32 new_address = (u32) udc->device_address;
1531                 fsl_writel(new_address << USB_DEVICE_ADDRESS_BIT_POS,
1532                                 &dr_regs->deviceaddr);
1533         }
1534
1535         done(ep0, req, 0);
1536
1537         switch (udc->ep0_state) {
1538         case DATA_STATE_XMIT:
1539                 /* already primed at setup_received_irq */
1540                 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1541                 break;
1542         case DATA_STATE_RECV:
1543                 /* send status phase */
1544                 if (ep0_prime_status(udc, EP_DIR_IN))
1545                         ep0stall(udc);
1546                 break;
1547         case WAIT_FOR_OUT_STATUS:
1548                 udc->ep0_state = WAIT_FOR_SETUP;
1549                 break;
1550         case WAIT_FOR_SETUP:
1551                 ERR("Unexpect ep0 packets\n");
1552                 break;
1553         default:
1554                 ep0stall(udc);
1555                 break;
1556         }
1557 }
1558
1559 /* Tripwire mechanism to ensure a setup packet payload is extracted without
1560  * being corrupted by another incoming setup packet */
1561 static void tripwire_handler(struct fsl_udc *udc, u8 ep_num, u8 *buffer_ptr)
1562 {
1563         u32 temp;
1564         struct ep_queue_head *qh;
1565         struct fsl_usb2_platform_data *pdata = udc->pdata;
1566
1567         qh = &udc->ep_qh[ep_num * 2 + EP_DIR_OUT];
1568
1569         /* Clear bit in ENDPTSETUPSTAT */
1570         temp = fsl_readl(&dr_regs->endptsetupstat);
1571         fsl_writel(temp | (1 << ep_num), &dr_regs->endptsetupstat);
1572
1573         /* while a hazard exists when setup package arrives */
1574         do {
1575                 /* Set Setup Tripwire */
1576                 temp = fsl_readl(&dr_regs->usbcmd);
1577                 fsl_writel(temp | USB_CMD_SUTW, &dr_regs->usbcmd);
1578
1579                 /* Copy the setup packet to local buffer */
1580                 if (pdata->le_setup_buf) {
1581                         u32 *p = (u32 *)buffer_ptr;
1582                         u32 *s = (u32 *)qh->setup_buffer;
1583
1584                         /* Convert little endian setup buffer to CPU endian */
1585                         *p++ = le32_to_cpu(*s++);
1586                         *p = le32_to_cpu(*s);
1587                 } else {
1588                         memcpy(buffer_ptr, (u8 *) qh->setup_buffer, 8);
1589                 }
1590         } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_SUTW));
1591
1592         /* Clear Setup Tripwire */
1593         temp = fsl_readl(&dr_regs->usbcmd);
1594         fsl_writel(temp & ~USB_CMD_SUTW, &dr_regs->usbcmd);
1595 }
1596
1597 /* process-ep_req(): free the completed Tds for this req */
1598 static int process_ep_req(struct fsl_udc *udc, int pipe,
1599                 struct fsl_req *curr_req)
1600 {
1601         struct ep_td_struct *curr_td;
1602         int     td_complete, actual, remaining_length, j, tmp;
1603         int     status = 0;
1604         int     errors = 0;
1605         struct  ep_queue_head *curr_qh = &udc->ep_qh[pipe];
1606         int direction = pipe % 2;
1607
1608         curr_td = curr_req->head;
1609         td_complete = 0;
1610         actual = curr_req->req.length;
1611
1612         for (j = 0; j < curr_req->dtd_count; j++) {
1613                 remaining_length = (hc32_to_cpu(curr_td->size_ioc_sts)
1614                                         & DTD_PACKET_SIZE)
1615                                 >> DTD_LENGTH_BIT_POS;
1616                 actual -= remaining_length;
1617
1618                 errors = hc32_to_cpu(curr_td->size_ioc_sts);
1619                 if (errors & DTD_ERROR_MASK) {
1620                         if (errors & DTD_STATUS_HALTED) {
1621                                 ERR("dTD error %08x QH=%d\n", errors, pipe);
1622                                 /* Clear the errors and Halt condition */
1623                                 tmp = hc32_to_cpu(curr_qh->size_ioc_int_sts);
1624                                 tmp &= ~errors;
1625                                 curr_qh->size_ioc_int_sts = cpu_to_hc32(tmp);
1626                                 status = -EPIPE;
1627                                 /* FIXME: continue with next queued TD? */
1628
1629                                 break;
1630                         }
1631                         if (errors & DTD_STATUS_DATA_BUFF_ERR) {
1632                                 VDBG("Transfer overflow");
1633                                 status = -EPROTO;
1634                                 break;
1635                         } else if (errors & DTD_STATUS_TRANSACTION_ERR) {
1636                                 VDBG("ISO error");
1637                                 status = -EILSEQ;
1638                                 break;
1639                         } else
1640                                 ERR("Unknown error has occurred (0x%x)!\n",
1641                                         errors);
1642
1643                 } else if (hc32_to_cpu(curr_td->size_ioc_sts)
1644                                 & DTD_STATUS_ACTIVE) {
1645                         VDBG("Request not complete");
1646                         status = REQ_UNCOMPLETE;
1647                         return status;
1648                 } else if (remaining_length) {
1649                         if (direction) {
1650                                 VDBG("Transmit dTD remaining length not zero");
1651                                 status = -EPROTO;
1652                                 break;
1653                         } else {
1654                                 td_complete++;
1655                                 break;
1656                         }
1657                 } else {
1658                         td_complete++;
1659                         VDBG("dTD transmitted successful");
1660                 }
1661
1662                 if (j != curr_req->dtd_count - 1)
1663                         curr_td = (struct ep_td_struct *)curr_td->next_td_virt;
1664         }
1665
1666         if (status)
1667                 return status;
1668
1669         curr_req->req.actual = actual;
1670
1671         return 0;
1672 }
1673
1674 /* Process a DTD completion interrupt */
1675 static void dtd_complete_irq(struct fsl_udc *udc)
1676 {
1677         u32 bit_pos;
1678         int i, ep_num, direction, bit_mask, status;
1679         struct fsl_ep *curr_ep;
1680         struct fsl_req *curr_req, *temp_req;
1681
1682         /* Clear the bits in the register */
1683         bit_pos = fsl_readl(&dr_regs->endptcomplete);
1684         fsl_writel(bit_pos, &dr_regs->endptcomplete);
1685
1686         if (!bit_pos)
1687                 return;
1688
1689         for (i = 0; i < udc->max_ep; i++) {
1690                 ep_num = i >> 1;
1691                 direction = i % 2;
1692
1693                 bit_mask = 1 << (ep_num + 16 * direction);
1694
1695                 if (!(bit_pos & bit_mask))
1696                         continue;
1697
1698                 curr_ep = get_ep_by_pipe(udc, i);
1699
1700                 /* If the ep is configured */
1701                 if (!curr_ep->ep.name) {
1702                         WARNING("Invalid EP?");
1703                         continue;
1704                 }
1705
1706                 /* process the req queue until an uncomplete request */
1707                 list_for_each_entry_safe(curr_req, temp_req, &curr_ep->queue,
1708                                 queue) {
1709                         status = process_ep_req(udc, i, curr_req);
1710
1711                         VDBG("status of process_ep_req= %d, ep = %d",
1712                                         status, ep_num);
1713                         if (status == REQ_UNCOMPLETE)
1714                                 break;
1715                         /* write back status to req */
1716                         curr_req->req.status = status;
1717
1718                         if (ep_num == 0) {
1719                                 ep0_req_complete(udc, curr_ep, curr_req);
1720                                 break;
1721                         } else
1722                                 done(curr_ep, curr_req, status);
1723                 }
1724         }
1725 }
1726
1727 static inline enum usb_device_speed portscx_device_speed(u32 reg)
1728 {
1729         switch (reg & PORTSCX_PORT_SPEED_MASK) {
1730         case PORTSCX_PORT_SPEED_HIGH:
1731                 return USB_SPEED_HIGH;
1732         case PORTSCX_PORT_SPEED_FULL:
1733                 return USB_SPEED_FULL;
1734         case PORTSCX_PORT_SPEED_LOW:
1735                 return USB_SPEED_LOW;
1736         default:
1737                 return USB_SPEED_UNKNOWN;
1738         }
1739 }
1740
1741 /* Process a port change interrupt */
1742 static void port_change_irq(struct fsl_udc *udc)
1743 {
1744         if (udc->bus_reset)
1745                 udc->bus_reset = 0;
1746
1747         /* Bus resetting is finished */
1748         if (!(fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET))
1749                 /* Get the speed */
1750                 udc->gadget.speed =
1751                         portscx_device_speed(fsl_readl(&dr_regs->portsc1));
1752
1753         /* Update USB state */
1754         if (!udc->resume_state)
1755                 udc->usb_state = USB_STATE_DEFAULT;
1756 }
1757
1758 /* Process suspend interrupt */
1759 static void suspend_irq(struct fsl_udc *udc)
1760 {
1761         udc->resume_state = udc->usb_state;
1762         udc->usb_state = USB_STATE_SUSPENDED;
1763
1764         /* report suspend to the driver, serial.c does not support this */
1765         if (udc->driver->suspend)
1766                 udc->driver->suspend(&udc->gadget);
1767 }
1768
1769 static void bus_resume(struct fsl_udc *udc)
1770 {
1771         udc->usb_state = udc->resume_state;
1772         udc->resume_state = 0;
1773
1774         /* report resume to the driver, serial.c does not support this */
1775         if (udc->driver->resume)
1776                 udc->driver->resume(&udc->gadget);
1777 }
1778
1779 /* Clear up all ep queues */
1780 static int reset_queues(struct fsl_udc *udc, bool bus_reset)
1781 {
1782         u8 pipe;
1783
1784         for (pipe = 0; pipe < udc->max_pipes; pipe++)
1785                 udc_reset_ep_queue(udc, pipe);
1786
1787         /* report disconnect; the driver is already quiesced */
1788         spin_unlock(&udc->lock);
1789         if (bus_reset)
1790                 usb_gadget_udc_reset(&udc->gadget, udc->driver);
1791         else
1792                 udc->driver->disconnect(&udc->gadget);
1793         spin_lock(&udc->lock);
1794
1795         return 0;
1796 }
1797
1798 /* Process reset interrupt */
1799 static void reset_irq(struct fsl_udc *udc)
1800 {
1801         u32 temp;
1802         unsigned long timeout;
1803
1804         /* Clear the device address */
1805         temp = fsl_readl(&dr_regs->deviceaddr);
1806         fsl_writel(temp & ~USB_DEVICE_ADDRESS_MASK, &dr_regs->deviceaddr);
1807
1808         udc->device_address = 0;
1809
1810         /* Clear usb state */
1811         udc->resume_state = 0;
1812         udc->ep0_dir = 0;
1813         udc->ep0_state = WAIT_FOR_SETUP;
1814         udc->remote_wakeup = 0; /* default to 0 on reset */
1815         udc->gadget.b_hnp_enable = 0;
1816         udc->gadget.a_hnp_support = 0;
1817         udc->gadget.a_alt_hnp_support = 0;
1818
1819         /* Clear all the setup token semaphores */
1820         temp = fsl_readl(&dr_regs->endptsetupstat);
1821         fsl_writel(temp, &dr_regs->endptsetupstat);
1822
1823         /* Clear all the endpoint complete status bits */
1824         temp = fsl_readl(&dr_regs->endptcomplete);
1825         fsl_writel(temp, &dr_regs->endptcomplete);
1826
1827         timeout = jiffies + 100;
1828         while (fsl_readl(&dr_regs->endpointprime)) {
1829                 /* Wait until all endptprime bits cleared */
1830                 if (time_after(jiffies, timeout)) {
1831                         ERR("Timeout for reset\n");
1832                         break;
1833                 }
1834                 cpu_relax();
1835         }
1836
1837         /* Write 1s to the flush register */
1838         fsl_writel(0xffffffff, &dr_regs->endptflush);
1839
1840         if (fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET) {
1841                 VDBG("Bus reset");
1842                 /* Bus is reseting */
1843                 udc->bus_reset = 1;
1844                 /* Reset all the queues, include XD, dTD, EP queue
1845                  * head and TR Queue */
1846                 reset_queues(udc, true);
1847                 udc->usb_state = USB_STATE_DEFAULT;
1848         } else {
1849                 VDBG("Controller reset");
1850                 /* initialize usb hw reg except for regs for EP, not
1851                  * touch usbintr reg */
1852                 dr_controller_setup(udc);
1853
1854                 /* Reset all internal used Queues */
1855                 reset_queues(udc, false);
1856
1857                 ep0_setup(udc);
1858
1859                 /* Enable DR IRQ reg, Set Run bit, change udc state */
1860                 dr_controller_run(udc);
1861                 udc->usb_state = USB_STATE_ATTACHED;
1862         }
1863 }
1864
1865 /*
1866  * USB device controller interrupt handler
1867  */
1868 static irqreturn_t fsl_udc_irq(int irq, void *_udc)
1869 {
1870         struct fsl_udc *udc = _udc;
1871         u32 irq_src;
1872         irqreturn_t status = IRQ_NONE;
1873         unsigned long flags;
1874
1875         /* Disable ISR for OTG host mode */
1876         if (udc->stopped)
1877                 return IRQ_NONE;
1878         spin_lock_irqsave(&udc->lock, flags);
1879         irq_src = fsl_readl(&dr_regs->usbsts) & fsl_readl(&dr_regs->usbintr);
1880         /* Clear notification bits */
1881         fsl_writel(irq_src, &dr_regs->usbsts);
1882
1883         /* VDBG("irq_src [0x%8x]", irq_src); */
1884
1885         /* Need to resume? */
1886         if (udc->usb_state == USB_STATE_SUSPENDED)
1887                 if ((fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_SUSPEND) == 0)
1888                         bus_resume(udc);
1889
1890         /* USB Interrupt */
1891         if (irq_src & USB_STS_INT) {
1892                 VDBG("Packet int");
1893                 /* Setup package, we only support ep0 as control ep */
1894                 if (fsl_readl(&dr_regs->endptsetupstat) & EP_SETUP_STATUS_EP0) {
1895                         tripwire_handler(udc, 0,
1896                                         (u8 *) (&udc->local_setup_buff));
1897                         setup_received_irq(udc, &udc->local_setup_buff);
1898                         status = IRQ_HANDLED;
1899                 }
1900
1901                 /* completion of dtd */
1902                 if (fsl_readl(&dr_regs->endptcomplete)) {
1903                         dtd_complete_irq(udc);
1904                         status = IRQ_HANDLED;
1905                 }
1906         }
1907
1908         /* SOF (for ISO transfer) */
1909         if (irq_src & USB_STS_SOF) {
1910                 status = IRQ_HANDLED;
1911         }
1912
1913         /* Port Change */
1914         if (irq_src & USB_STS_PORT_CHANGE) {
1915                 port_change_irq(udc);
1916                 status = IRQ_HANDLED;
1917         }
1918
1919         /* Reset Received */
1920         if (irq_src & USB_STS_RESET) {
1921                 VDBG("reset int");
1922                 reset_irq(udc);
1923                 status = IRQ_HANDLED;
1924         }
1925
1926         /* Sleep Enable (Suspend) */
1927         if (irq_src & USB_STS_SUSPEND) {
1928                 suspend_irq(udc);
1929                 status = IRQ_HANDLED;
1930         }
1931
1932         if (irq_src & (USB_STS_ERR | USB_STS_SYS_ERR)) {
1933                 VDBG("Error IRQ %x", irq_src);
1934         }
1935
1936         spin_unlock_irqrestore(&udc->lock, flags);
1937         return status;
1938 }
1939
1940 /*----------------------------------------------------------------*
1941  * Hook to gadget drivers
1942  * Called by initialization code of gadget drivers
1943 *----------------------------------------------------------------*/
1944 static int fsl_udc_start(struct usb_gadget *g,
1945                 struct usb_gadget_driver *driver)
1946 {
1947         int retval = 0;
1948         unsigned long flags = 0;
1949
1950         /* lock is needed but whether should use this lock or another */
1951         spin_lock_irqsave(&udc_controller->lock, flags);
1952
1953         driver->driver.bus = NULL;
1954         /* hook up the driver */
1955         udc_controller->driver = driver;
1956         spin_unlock_irqrestore(&udc_controller->lock, flags);
1957         g->is_selfpowered = 1;
1958
1959         if (!IS_ERR_OR_NULL(udc_controller->transceiver)) {
1960                 /* Suspend the controller until OTG enable it */
1961                 udc_controller->stopped = 1;
1962                 printk(KERN_INFO "Suspend udc for OTG auto detect\n");
1963
1964                 /* connect to bus through transceiver */
1965                 if (!IS_ERR_OR_NULL(udc_controller->transceiver)) {
1966                         retval = otg_set_peripheral(
1967                                         udc_controller->transceiver->otg,
1968                                                     &udc_controller->gadget);
1969                         if (retval < 0) {
1970                                 ERR("can't bind to transceiver\n");
1971                                 udc_controller->driver = NULL;
1972                                 return retval;
1973                         }
1974                 }
1975         } else {
1976                 /* Enable DR IRQ reg and set USBCMD reg Run bit */
1977                 dr_controller_run(udc_controller);
1978                 udc_controller->usb_state = USB_STATE_ATTACHED;
1979                 udc_controller->ep0_state = WAIT_FOR_SETUP;
1980                 udc_controller->ep0_dir = 0;
1981         }
1982
1983         return retval;
1984 }
1985
1986 /* Disconnect from gadget driver */
1987 static int fsl_udc_stop(struct usb_gadget *g)
1988 {
1989         struct fsl_ep *loop_ep;
1990         unsigned long flags;
1991
1992         if (!IS_ERR_OR_NULL(udc_controller->transceiver))
1993                 otg_set_peripheral(udc_controller->transceiver->otg, NULL);
1994
1995         /* stop DR, disable intr */
1996         dr_controller_stop(udc_controller);
1997
1998         /* in fact, no needed */
1999         udc_controller->usb_state = USB_STATE_ATTACHED;
2000         udc_controller->ep0_state = WAIT_FOR_SETUP;
2001         udc_controller->ep0_dir = 0;
2002
2003         /* stand operation */
2004         spin_lock_irqsave(&udc_controller->lock, flags);
2005         udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2006         nuke(&udc_controller->eps[0], -ESHUTDOWN);
2007         list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
2008                         ep.ep_list)
2009                 nuke(loop_ep, -ESHUTDOWN);
2010         spin_unlock_irqrestore(&udc_controller->lock, flags);
2011
2012         udc_controller->driver = NULL;
2013
2014         return 0;
2015 }
2016
2017 /*-------------------------------------------------------------------------
2018                 PROC File System Support
2019 -------------------------------------------------------------------------*/
2020 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
2021
2022 #include <linux/seq_file.h>
2023
2024 static const char proc_filename[] = "driver/fsl_usb2_udc";
2025
2026 static int fsl_proc_read(struct seq_file *m, void *v)
2027 {
2028         unsigned long flags;
2029         int i;
2030         u32 tmp_reg;
2031         struct fsl_ep *ep = NULL;
2032         struct fsl_req *req;
2033
2034         struct fsl_udc *udc = udc_controller;
2035
2036         spin_lock_irqsave(&udc->lock, flags);
2037
2038         /* ------basic driver information ---- */
2039         seq_printf(m,
2040                         DRIVER_DESC "\n"
2041                         "%s version: %s\n"
2042                         "Gadget driver: %s\n\n",
2043                         driver_name, DRIVER_VERSION,
2044                         udc->driver ? udc->driver->driver.name : "(none)");
2045
2046         /* ------ DR Registers ----- */
2047         tmp_reg = fsl_readl(&dr_regs->usbcmd);
2048         seq_printf(m,
2049                         "USBCMD reg:\n"
2050                         "SetupTW: %d\n"
2051                         "Run/Stop: %s\n\n",
2052                         (tmp_reg & USB_CMD_SUTW) ? 1 : 0,
2053                         (tmp_reg & USB_CMD_RUN_STOP) ? "Run" : "Stop");
2054
2055         tmp_reg = fsl_readl(&dr_regs->usbsts);
2056         seq_printf(m,
2057                         "USB Status Reg:\n"
2058                         "Dr Suspend: %d Reset Received: %d System Error: %s "
2059                         "USB Error Interrupt: %s\n\n",
2060                         (tmp_reg & USB_STS_SUSPEND) ? 1 : 0,
2061                         (tmp_reg & USB_STS_RESET) ? 1 : 0,
2062                         (tmp_reg & USB_STS_SYS_ERR) ? "Err" : "Normal",
2063                         (tmp_reg & USB_STS_ERR) ? "Err detected" : "No err");
2064
2065         tmp_reg = fsl_readl(&dr_regs->usbintr);
2066         seq_printf(m,
2067                         "USB Interrupt Enable Reg:\n"
2068                         "Sleep Enable: %d SOF Received Enable: %d "
2069                         "Reset Enable: %d\n"
2070                         "System Error Enable: %d "
2071                         "Port Change Dectected Enable: %d\n"
2072                         "USB Error Intr Enable: %d USB Intr Enable: %d\n\n",
2073                         (tmp_reg & USB_INTR_DEVICE_SUSPEND) ? 1 : 0,
2074                         (tmp_reg & USB_INTR_SOF_EN) ? 1 : 0,
2075                         (tmp_reg & USB_INTR_RESET_EN) ? 1 : 0,
2076                         (tmp_reg & USB_INTR_SYS_ERR_EN) ? 1 : 0,
2077                         (tmp_reg & USB_INTR_PTC_DETECT_EN) ? 1 : 0,
2078                         (tmp_reg & USB_INTR_ERR_INT_EN) ? 1 : 0,
2079                         (tmp_reg & USB_INTR_INT_EN) ? 1 : 0);
2080
2081         tmp_reg = fsl_readl(&dr_regs->frindex);
2082         seq_printf(m,
2083                         "USB Frame Index Reg: Frame Number is 0x%x\n\n",
2084                         (tmp_reg & USB_FRINDEX_MASKS));
2085
2086         tmp_reg = fsl_readl(&dr_regs->deviceaddr);
2087         seq_printf(m,
2088                         "USB Device Address Reg: Device Addr is 0x%x\n\n",
2089                         (tmp_reg & USB_DEVICE_ADDRESS_MASK));
2090
2091         tmp_reg = fsl_readl(&dr_regs->endpointlistaddr);
2092         seq_printf(m,
2093                         "USB Endpoint List Address Reg: "
2094                         "Device Addr is 0x%x\n\n",
2095                         (tmp_reg & USB_EP_LIST_ADDRESS_MASK));
2096
2097         tmp_reg = fsl_readl(&dr_regs->portsc1);
2098         seq_printf(m,
2099                 "USB Port Status&Control Reg:\n"
2100                 "Port Transceiver Type : %s Port Speed: %s\n"
2101                 "PHY Low Power Suspend: %s Port Reset: %s "
2102                 "Port Suspend Mode: %s\n"
2103                 "Over-current Change: %s "
2104                 "Port Enable/Disable Change: %s\n"
2105                 "Port Enabled/Disabled: %s "
2106                 "Current Connect Status: %s\n\n", ( {
2107                         const char *s;
2108                         switch (tmp_reg & PORTSCX_PTS_FSLS) {
2109                         case PORTSCX_PTS_UTMI:
2110                                 s = "UTMI"; break;
2111                         case PORTSCX_PTS_ULPI:
2112                                 s = "ULPI "; break;
2113                         case PORTSCX_PTS_FSLS:
2114                                 s = "FS/LS Serial"; break;
2115                         default:
2116                                 s = "None"; break;
2117                         }
2118                         s;} ),
2119                 usb_speed_string(portscx_device_speed(tmp_reg)),
2120                 (tmp_reg & PORTSCX_PHY_LOW_POWER_SPD) ?
2121                 "Normal PHY mode" : "Low power mode",
2122                 (tmp_reg & PORTSCX_PORT_RESET) ? "In Reset" :
2123                 "Not in Reset",
2124                 (tmp_reg & PORTSCX_PORT_SUSPEND) ? "In " : "Not in",
2125                 (tmp_reg & PORTSCX_OVER_CURRENT_CHG) ? "Dected" :
2126                 "No",
2127                 (tmp_reg & PORTSCX_PORT_EN_DIS_CHANGE) ? "Disable" :
2128                 "Not change",
2129                 (tmp_reg & PORTSCX_PORT_ENABLE) ? "Enable" :
2130                 "Not correct",
2131                 (tmp_reg & PORTSCX_CURRENT_CONNECT_STATUS) ?
2132                 "Attached" : "Not-Att");
2133
2134         tmp_reg = fsl_readl(&dr_regs->usbmode);
2135         seq_printf(m,
2136                         "USB Mode Reg: Controller Mode is: %s\n\n", ( {
2137                                 const char *s;
2138                                 switch (tmp_reg & USB_MODE_CTRL_MODE_HOST) {
2139                                 case USB_MODE_CTRL_MODE_IDLE:
2140                                         s = "Idle"; break;
2141                                 case USB_MODE_CTRL_MODE_DEVICE:
2142                                         s = "Device Controller"; break;
2143                                 case USB_MODE_CTRL_MODE_HOST:
2144                                         s = "Host Controller"; break;
2145                                 default:
2146                                         s = "None"; break;
2147                                 }
2148                                 s;
2149                         } ));
2150
2151         tmp_reg = fsl_readl(&dr_regs->endptsetupstat);
2152         seq_printf(m,
2153                         "Endpoint Setup Status Reg: SETUP on ep 0x%x\n\n",
2154                         (tmp_reg & EP_SETUP_STATUS_MASK));
2155
2156         for (i = 0; i < udc->max_ep / 2; i++) {
2157                 tmp_reg = fsl_readl(&dr_regs->endptctrl[i]);
2158                 seq_printf(m, "EP Ctrl Reg [0x%x]: = [0x%x]\n", i, tmp_reg);
2159         }
2160         tmp_reg = fsl_readl(&dr_regs->endpointprime);
2161         seq_printf(m, "EP Prime Reg = [0x%x]\n\n", tmp_reg);
2162
2163 #ifndef CONFIG_ARCH_MXC
2164         if (udc->pdata->have_sysif_regs) {
2165                 tmp_reg = usb_sys_regs->snoop1;
2166                 seq_printf(m, "Snoop1 Reg : = [0x%x]\n\n", tmp_reg);
2167
2168                 tmp_reg = usb_sys_regs->control;
2169                 seq_printf(m, "General Control Reg : = [0x%x]\n\n", tmp_reg);
2170         }
2171 #endif
2172
2173         /* ------fsl_udc, fsl_ep, fsl_request structure information ----- */
2174         ep = &udc->eps[0];
2175         seq_printf(m, "For %s Maxpkt is 0x%x index is 0x%x\n",
2176                         ep->ep.name, ep_maxpacket(ep), ep_index(ep));
2177
2178         if (list_empty(&ep->queue)) {
2179                 seq_puts(m, "its req queue is empty\n\n");
2180         } else {
2181                 list_for_each_entry(req, &ep->queue, queue) {
2182                         seq_printf(m,
2183                                 "req %p actual 0x%x length 0x%x buf %p\n",
2184                                 &req->req, req->req.actual,
2185                                 req->req.length, req->req.buf);
2186                 }
2187         }
2188         /* other gadget->eplist ep */
2189         list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
2190                 if (ep->ep.desc) {
2191                         seq_printf(m,
2192                                         "\nFor %s Maxpkt is 0x%x "
2193                                         "index is 0x%x\n",
2194                                         ep->ep.name, ep_maxpacket(ep),
2195                                         ep_index(ep));
2196
2197                         if (list_empty(&ep->queue)) {
2198                                 seq_puts(m, "its req queue is empty\n\n");
2199                         } else {
2200                                 list_for_each_entry(req, &ep->queue, queue) {
2201                                         seq_printf(m,
2202                                                 "req %p actual 0x%x length "
2203                                                 "0x%x  buf %p\n",
2204                                                 &req->req, req->req.actual,
2205                                                 req->req.length, req->req.buf);
2206                                 }       /* end for each_entry of ep req */
2207                         }       /* end for else */
2208                 }       /* end for if(ep->queue) */
2209         }       /* end (ep->desc) */
2210
2211         spin_unlock_irqrestore(&udc->lock, flags);
2212         return 0;
2213 }
2214
2215 /*
2216  * seq_file wrappers for procfile show routines.
2217  */
2218 static int fsl_proc_open(struct inode *inode, struct file *file)
2219 {
2220         return single_open(file, fsl_proc_read, NULL);
2221 }
2222
2223 static const struct file_operations fsl_proc_fops = {
2224         .open           = fsl_proc_open,
2225         .read           = seq_read,
2226         .llseek         = seq_lseek,
2227         .release        = single_release,
2228 };
2229
2230 #define create_proc_file()      proc_create(proc_filename, 0, NULL, &fsl_proc_fops)
2231 #define remove_proc_file()      remove_proc_entry(proc_filename, NULL)
2232
2233 #else                           /* !CONFIG_USB_GADGET_DEBUG_FILES */
2234
2235 #define create_proc_file()      do {} while (0)
2236 #define remove_proc_file()      do {} while (0)
2237
2238 #endif                          /* CONFIG_USB_GADGET_DEBUG_FILES */
2239
2240 /*-------------------------------------------------------------------------*/
2241
2242 /* Release udc structures */
2243 static void fsl_udc_release(struct device *dev)
2244 {
2245         complete(udc_controller->done);
2246         dma_free_coherent(dev->parent, udc_controller->ep_qh_size,
2247                         udc_controller->ep_qh, udc_controller->ep_qh_dma);
2248         kfree(udc_controller);
2249 }
2250
2251 /******************************************************************
2252         Internal structure setup functions
2253 *******************************************************************/
2254 /*------------------------------------------------------------------
2255  * init resource for globle controller
2256  * Return the udc handle on success or NULL on failure
2257  ------------------------------------------------------------------*/
2258 static int struct_udc_setup(struct fsl_udc *udc,
2259                 struct platform_device *pdev)
2260 {
2261         struct fsl_usb2_platform_data *pdata;
2262         size_t size;
2263
2264         pdata = dev_get_platdata(&pdev->dev);
2265         udc->phy_mode = pdata->phy_mode;
2266
2267         udc->eps = kzalloc(sizeof(struct fsl_ep) * udc->max_ep, GFP_KERNEL);
2268         if (!udc->eps)
2269                 return -1;
2270
2271         /* initialized QHs, take care of alignment */
2272         size = udc->max_ep * sizeof(struct ep_queue_head);
2273         if (size < QH_ALIGNMENT)
2274                 size = QH_ALIGNMENT;
2275         else if ((size % QH_ALIGNMENT) != 0) {
2276                 size += QH_ALIGNMENT + 1;
2277                 size &= ~(QH_ALIGNMENT - 1);
2278         }
2279         udc->ep_qh = dma_alloc_coherent(&pdev->dev, size,
2280                                         &udc->ep_qh_dma, GFP_KERNEL);
2281         if (!udc->ep_qh) {
2282                 ERR("malloc QHs for udc failed\n");
2283                 kfree(udc->eps);
2284                 return -1;
2285         }
2286
2287         udc->ep_qh_size = size;
2288
2289         /* Initialize ep0 status request structure */
2290         /* FIXME: fsl_alloc_request() ignores ep argument */
2291         udc->status_req = container_of(fsl_alloc_request(NULL, GFP_KERNEL),
2292                         struct fsl_req, req);
2293         /* allocate a small amount of memory to get valid address */
2294         udc->status_req->req.buf = kmalloc(8, GFP_KERNEL);
2295
2296         udc->resume_state = USB_STATE_NOTATTACHED;
2297         udc->usb_state = USB_STATE_POWERED;
2298         udc->ep0_dir = 0;
2299         udc->remote_wakeup = 0; /* default to 0 on reset */
2300
2301         return 0;
2302 }
2303
2304 /*----------------------------------------------------------------
2305  * Setup the fsl_ep struct for eps
2306  * Link fsl_ep->ep to gadget->ep_list
2307  * ep0out is not used so do nothing here
2308  * ep0in should be taken care
2309  *--------------------------------------------------------------*/
2310 static int struct_ep_setup(struct fsl_udc *udc, unsigned char index,
2311                 char *name, int link)
2312 {
2313         struct fsl_ep *ep = &udc->eps[index];
2314
2315         ep->udc = udc;
2316         strcpy(ep->name, name);
2317         ep->ep.name = ep->name;
2318
2319         ep->ep.ops = &fsl_ep_ops;
2320         ep->stopped = 0;
2321
2322         if (index == 0) {
2323                 ep->ep.caps.type_control = true;
2324         } else {
2325                 ep->ep.caps.type_iso = true;
2326                 ep->ep.caps.type_bulk = true;
2327                 ep->ep.caps.type_int = true;
2328         }
2329
2330         if (index & 1)
2331                 ep->ep.caps.dir_in = true;
2332         else
2333                 ep->ep.caps.dir_out = true;
2334
2335         /* for ep0: maxP defined in desc
2336          * for other eps, maxP is set by epautoconfig() called by gadget layer
2337          */
2338         usb_ep_set_maxpacket_limit(&ep->ep, (unsigned short) ~0);
2339
2340         /* the queue lists any req for this ep */
2341         INIT_LIST_HEAD(&ep->queue);
2342
2343         /* gagdet.ep_list used for ep_autoconfig so no ep0 */
2344         if (link)
2345                 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2346         ep->gadget = &udc->gadget;
2347         ep->qh = &udc->ep_qh[index];
2348
2349         return 0;
2350 }
2351
2352 /* Driver probe function
2353  * all intialization operations implemented here except enabling usb_intr reg
2354  * board setup should have been done in the platform code
2355  */
2356 static int fsl_udc_probe(struct platform_device *pdev)
2357 {
2358         struct fsl_usb2_platform_data *pdata;
2359         struct resource *res;
2360         int ret = -ENODEV;
2361         unsigned int i;
2362         u32 dccparams;
2363
2364         udc_controller = kzalloc(sizeof(struct fsl_udc), GFP_KERNEL);
2365         if (udc_controller == NULL)
2366                 return -ENOMEM;
2367
2368         pdata = dev_get_platdata(&pdev->dev);
2369         udc_controller->pdata = pdata;
2370         spin_lock_init(&udc_controller->lock);
2371         udc_controller->stopped = 1;
2372
2373 #ifdef CONFIG_USB_OTG
2374         if (pdata->operating_mode == FSL_USB2_DR_OTG) {
2375                 udc_controller->transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
2376                 if (IS_ERR_OR_NULL(udc_controller->transceiver)) {
2377                         ERR("Can't find OTG driver!\n");
2378                         ret = -ENODEV;
2379                         goto err_kfree;
2380                 }
2381         }
2382 #endif
2383
2384         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2385         if (!res) {
2386                 ret = -ENXIO;
2387                 goto err_kfree;
2388         }
2389
2390         if (pdata->operating_mode == FSL_USB2_DR_DEVICE) {
2391                 if (!request_mem_region(res->start, resource_size(res),
2392                                         driver_name)) {
2393                         ERR("request mem region for %s failed\n", pdev->name);
2394                         ret = -EBUSY;
2395                         goto err_kfree;
2396                 }
2397         }
2398
2399         dr_regs = ioremap(res->start, resource_size(res));
2400         if (!dr_regs) {
2401                 ret = -ENOMEM;
2402                 goto err_release_mem_region;
2403         }
2404
2405         pdata->regs = (void __iomem *)dr_regs;
2406
2407         /*
2408          * do platform specific init: check the clock, grab/config pins, etc.
2409          */
2410         if (pdata->init && pdata->init(pdev)) {
2411                 ret = -ENODEV;
2412                 goto err_iounmap_noclk;
2413         }
2414
2415         /* Set accessors only after pdata->init() ! */
2416         fsl_set_accessors(pdata);
2417
2418 #ifndef CONFIG_ARCH_MXC
2419         if (pdata->have_sysif_regs)
2420                 usb_sys_regs = (void *)dr_regs + USB_DR_SYS_OFFSET;
2421 #endif
2422
2423         /* Initialize USB clocks */
2424         ret = fsl_udc_clk_init(pdev);
2425         if (ret < 0)
2426                 goto err_iounmap_noclk;
2427
2428         /* Read Device Controller Capability Parameters register */
2429         dccparams = fsl_readl(&dr_regs->dccparams);
2430         if (!(dccparams & DCCPARAMS_DC)) {
2431                 ERR("This SOC doesn't support device role\n");
2432                 ret = -ENODEV;
2433                 goto err_iounmap;
2434         }
2435         /* Get max device endpoints */
2436         /* DEN is bidirectional ep number, max_ep doubles the number */
2437         udc_controller->max_ep = (dccparams & DCCPARAMS_DEN_MASK) * 2;
2438
2439         udc_controller->irq = platform_get_irq(pdev, 0);
2440         if (!udc_controller->irq) {
2441                 ret = -ENODEV;
2442                 goto err_iounmap;
2443         }
2444
2445         ret = request_irq(udc_controller->irq, fsl_udc_irq, IRQF_SHARED,
2446                         driver_name, udc_controller);
2447         if (ret != 0) {
2448                 ERR("cannot request irq %d err %d\n",
2449                                 udc_controller->irq, ret);
2450                 goto err_iounmap;
2451         }
2452
2453         /* Initialize the udc structure including QH member and other member */
2454         if (struct_udc_setup(udc_controller, pdev)) {
2455                 ERR("Can't initialize udc data structure\n");
2456                 ret = -ENOMEM;
2457                 goto err_free_irq;
2458         }
2459
2460         if (IS_ERR_OR_NULL(udc_controller->transceiver)) {
2461                 /* initialize usb hw reg except for regs for EP,
2462                  * leave usbintr reg untouched */
2463                 dr_controller_setup(udc_controller);
2464         }
2465
2466         ret = fsl_udc_clk_finalize(pdev);
2467         if (ret)
2468                 goto err_free_irq;
2469
2470         /* Setup gadget structure */
2471         udc_controller->gadget.ops = &fsl_gadget_ops;
2472         udc_controller->gadget.max_speed = USB_SPEED_HIGH;
2473         udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
2474         INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
2475         udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2476         udc_controller->gadget.name = driver_name;
2477
2478         /* Setup gadget.dev and register with kernel */
2479         dev_set_name(&udc_controller->gadget.dev, "gadget");
2480         udc_controller->gadget.dev.of_node = pdev->dev.of_node;
2481
2482         if (!IS_ERR_OR_NULL(udc_controller->transceiver))
2483                 udc_controller->gadget.is_otg = 1;
2484
2485         /* setup QH and epctrl for ep0 */
2486         ep0_setup(udc_controller);
2487
2488         /* setup udc->eps[] for ep0 */
2489         struct_ep_setup(udc_controller, 0, "ep0", 0);
2490         /* for ep0: the desc defined here;
2491          * for other eps, gadget layer called ep_enable with defined desc
2492          */
2493         udc_controller->eps[0].ep.desc = &fsl_ep0_desc;
2494         usb_ep_set_maxpacket_limit(&udc_controller->eps[0].ep,
2495                                    USB_MAX_CTRL_PAYLOAD);
2496
2497         /* setup the udc->eps[] for non-control endpoints and link
2498          * to gadget.ep_list */
2499         for (i = 1; i < (int)(udc_controller->max_ep / 2); i++) {
2500                 char name[14];
2501
2502                 sprintf(name, "ep%dout", i);
2503                 struct_ep_setup(udc_controller, i * 2, name, 1);
2504                 sprintf(name, "ep%din", i);
2505                 struct_ep_setup(udc_controller, i * 2 + 1, name, 1);
2506         }
2507
2508         /* use dma_pool for TD management */
2509         udc_controller->td_pool = dma_pool_create("udc_td", &pdev->dev,
2510                         sizeof(struct ep_td_struct),
2511                         DTD_ALIGNMENT, UDC_DMA_BOUNDARY);
2512         if (udc_controller->td_pool == NULL) {
2513                 ret = -ENOMEM;
2514                 goto err_free_irq;
2515         }
2516
2517         ret = usb_add_gadget_udc_release(&pdev->dev, &udc_controller->gadget,
2518                         fsl_udc_release);
2519         if (ret)
2520                 goto err_del_udc;
2521
2522         create_proc_file();
2523         return 0;
2524
2525 err_del_udc:
2526         dma_pool_destroy(udc_controller->td_pool);
2527 err_free_irq:
2528         free_irq(udc_controller->irq, udc_controller);
2529 err_iounmap:
2530         if (pdata->exit)
2531                 pdata->exit(pdev);
2532         fsl_udc_clk_release();
2533 err_iounmap_noclk:
2534         iounmap(dr_regs);
2535 err_release_mem_region:
2536         if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
2537                 release_mem_region(res->start, resource_size(res));
2538 err_kfree:
2539         kfree(udc_controller);
2540         udc_controller = NULL;
2541         return ret;
2542 }
2543
2544 /* Driver removal function
2545  * Free resources and finish pending transactions
2546  */
2547 static int fsl_udc_remove(struct platform_device *pdev)
2548 {
2549         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2550         struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
2551
2552         DECLARE_COMPLETION_ONSTACK(done);
2553
2554         if (!udc_controller)
2555                 return -ENODEV;
2556
2557         udc_controller->done = &done;
2558         usb_del_gadget_udc(&udc_controller->gadget);
2559
2560         fsl_udc_clk_release();
2561
2562         /* DR has been stopped in usb_gadget_unregister_driver() */
2563         remove_proc_file();
2564
2565         /* Free allocated memory */
2566         kfree(udc_controller->status_req->req.buf);
2567         kfree(udc_controller->status_req);
2568         kfree(udc_controller->eps);
2569
2570         dma_pool_destroy(udc_controller->td_pool);
2571         free_irq(udc_controller->irq, udc_controller);
2572         iounmap(dr_regs);
2573         if (res && (pdata->operating_mode == FSL_USB2_DR_DEVICE))
2574                 release_mem_region(res->start, resource_size(res));
2575
2576         /* free udc --wait for the release() finished */
2577         wait_for_completion(&done);
2578
2579         /*
2580          * do platform specific un-initialization:
2581          * release iomux pins, etc.
2582          */
2583         if (pdata->exit)
2584                 pdata->exit(pdev);
2585
2586         return 0;
2587 }
2588
2589 /*-----------------------------------------------------------------
2590  * Modify Power management attributes
2591  * Used by OTG statemachine to disable gadget temporarily
2592  -----------------------------------------------------------------*/
2593 static int fsl_udc_suspend(struct platform_device *pdev, pm_message_t state)
2594 {
2595         dr_controller_stop(udc_controller);
2596         return 0;
2597 }
2598
2599 /*-----------------------------------------------------------------
2600  * Invoked on USB resume. May be called in_interrupt.
2601  * Here we start the DR controller and enable the irq
2602  *-----------------------------------------------------------------*/
2603 static int fsl_udc_resume(struct platform_device *pdev)
2604 {
2605         /* Enable DR irq reg and set controller Run */
2606         if (udc_controller->stopped) {
2607                 dr_controller_setup(udc_controller);
2608                 dr_controller_run(udc_controller);
2609         }
2610         udc_controller->usb_state = USB_STATE_ATTACHED;
2611         udc_controller->ep0_state = WAIT_FOR_SETUP;
2612         udc_controller->ep0_dir = 0;
2613         return 0;
2614 }
2615
2616 static int fsl_udc_otg_suspend(struct device *dev, pm_message_t state)
2617 {
2618         struct fsl_udc *udc = udc_controller;
2619         u32 mode, usbcmd;
2620
2621         mode = fsl_readl(&dr_regs->usbmode) & USB_MODE_CTRL_MODE_MASK;
2622
2623         pr_debug("%s(): mode 0x%x stopped %d\n", __func__, mode, udc->stopped);
2624
2625         /*
2626          * If the controller is already stopped, then this must be a
2627          * PM suspend.  Remember this fact, so that we will leave the
2628          * controller stopped at PM resume time.
2629          */
2630         if (udc->stopped) {
2631                 pr_debug("gadget already stopped, leaving early\n");
2632                 udc->already_stopped = 1;
2633                 return 0;
2634         }
2635
2636         if (mode != USB_MODE_CTRL_MODE_DEVICE) {
2637                 pr_debug("gadget not in device mode, leaving early\n");
2638                 return 0;
2639         }
2640
2641         /* stop the controller */
2642         usbcmd = fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP;
2643         fsl_writel(usbcmd, &dr_regs->usbcmd);
2644
2645         udc->stopped = 1;
2646
2647         pr_info("USB Gadget suspended\n");
2648
2649         return 0;
2650 }
2651
2652 static int fsl_udc_otg_resume(struct device *dev)
2653 {
2654         pr_debug("%s(): stopped %d  already_stopped %d\n", __func__,
2655                  udc_controller->stopped, udc_controller->already_stopped);
2656
2657         /*
2658          * If the controller was stopped at suspend time, then
2659          * don't resume it now.
2660          */
2661         if (udc_controller->already_stopped) {
2662                 udc_controller->already_stopped = 0;
2663                 pr_debug("gadget was already stopped, leaving early\n");
2664                 return 0;
2665         }
2666
2667         pr_info("USB Gadget resume\n");
2668
2669         return fsl_udc_resume(NULL);
2670 }
2671 /*-------------------------------------------------------------------------
2672         Register entry point for the peripheral controller driver
2673 --------------------------------------------------------------------------*/
2674 static const struct platform_device_id fsl_udc_devtype[] = {
2675         {
2676                 .name = "imx-udc-mx27",
2677         }, {
2678                 .name = "imx-udc-mx51",
2679         }, {
2680                 /* sentinel */
2681         }
2682 };
2683 MODULE_DEVICE_TABLE(platform, fsl_udc_devtype);
2684 static struct platform_driver udc_driver = {
2685         .remove         = fsl_udc_remove,
2686         /* Just for FSL i.mx SoC currently */
2687         .id_table       = fsl_udc_devtype,
2688         /* these suspend and resume are not usb suspend and resume */
2689         .suspend        = fsl_udc_suspend,
2690         .resume         = fsl_udc_resume,
2691         .driver         = {
2692                         .name = driver_name,
2693                         /* udc suspend/resume called from OTG driver */
2694                         .suspend = fsl_udc_otg_suspend,
2695                         .resume  = fsl_udc_otg_resume,
2696         },
2697 };
2698
2699 module_platform_driver_probe(udc_driver, fsl_udc_probe);
2700
2701 MODULE_DESCRIPTION(DRIVER_DESC);
2702 MODULE_AUTHOR(DRIVER_AUTHOR);
2703 MODULE_LICENSE("GPL");
2704 MODULE_ALIAS("platform:fsl-usb2-udc");