drivers/usb/gadget/fsl_udc_core.c

   1 /*
   2  * Copyright (C) 2004-2007,2011 Freescale Semiconductor, Inc.
   3  * All rights reserved.
   4  *
   5  * Author: Li Yang <leoli@freescale.com>
   6  *         Jiang Bo <tanya.jiang@freescale.com>
   7  *
   8  * Description:
   9  * Freescale high-speed USB SOC DR module device controller driver.
  10  * This can be found on MPC8349E/MPC8313E/MPC5121E cpus.
  11  * The driver is previously named as mpc_udc.  Based on bare board
  12  * code from Dave Liu and Shlomi Gridish.
  13  *
  14  * This program is free software; you can redistribute  it and/or modify it
  15  * under  the terms of  the GNU General  Public License as published by the
  16  * Free Software Foundation;  either version 2 of the  License, or (at your
  17  * option) any later version.
  18  */
  19
  20 #undef VERBOSE
  21
  22 #include <linux/module.h>
  23 #include <linux/kernel.h>
  24 #include <linux/ioport.h>
  25 #include <linux/types.h>
  26 #include <linux/errno.h>
  27 #include <linux/slab.h>
  28 #include <linux/init.h>
  29 #include <linux/list.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/proc_fs.h>
  32 #include <linux/mm.h>
  33 #include <linux/moduleparam.h>
  34 #include <linux/device.h>
  35 #include <linux/usb/ch9.h>
  36 #include <linux/usb/gadget.h>
  37 #include <linux/usb/otg.h>
  38 #include <linux/dma-mapping.h>
  39 #include <linux/platform_device.h>
  40 #include <linux/fsl_devices.h>
  41 #include <linux/dmapool.h>
  42 #include <linux/delay.h>
  43
  44 #include <asm/byteorder.h>
  45 #include <asm/io.h>
  46 #include <asm/unaligned.h>
  47 #include <asm/dma.h>
  48
  49 #include "fsl_usb2_udc.h"
  50
  51 #define DRIVER_DESC     "Freescale High-Speed USB SOC Device Controller driver"
  52 #define DRIVER_AUTHOR   "Li Yang/Jiang Bo"
  53 #define DRIVER_VERSION  "Apr 20, 2007"
  54
  55 #define DMA_ADDR_INVALID        (~(dma_addr_t)0)
  56
  57 static const char driver_name[] = "fsl-usb2-udc";
  58 static const char driver_desc[] = DRIVER_DESC;
  59
  60 static struct usb_dr_device *dr_regs;
  61 #ifndef CONFIG_ARCH_MXC
  62 static struct usb_sys_interface *usb_sys_regs;
  63 #endif
  64
  65 /* it is initialized in probe()  */
  66 static struct fsl_udc *udc_controller = NULL;
  67
  68 static const struct usb_endpoint_descriptor
  69 fsl_ep0_desc = {
  70         .bLength =              USB_DT_ENDPOINT_SIZE,
  71         .bDescriptorType =      USB_DT_ENDPOINT,
  72         .bEndpointAddress =     0,
  73         .bmAttributes =         USB_ENDPOINT_XFER_CONTROL,
  74         .wMaxPacketSize =       USB_MAX_CTRL_PAYLOAD,
  75 };
  76
  77 static void fsl_ep_fifo_flush(struct usb_ep *_ep);
  78
  79 #ifdef CONFIG_PPC32
  80 /*
  81  * On some SoCs, the USB controller registers can be big or little endian,
  82  * depending on the version of the chip. In order to be able to run the
  83  * same kernel binary on 2 different versions of an SoC, the BE/LE decision
  84  * must be made at run time. _fsl_readl and fsl_writel are pointers to the
  85  * BE or LE readl() and writel() functions, and fsl_readl() and fsl_writel()
  86  * call through those pointers. Platform code for SoCs that have BE USB
  87  * registers should set pdata->big_endian_mmio flag.
  88  *
  89  * This also applies to controller-to-cpu accessors for the USB descriptors,
  90  * since their endianness is also SoC dependant. Platform code for SoCs that
  91  * have BE USB descriptors should set pdata->big_endian_desc flag.
  92  */
  93 static u32 _fsl_readl_be(const unsigned __iomem *p)
  94 {
  95         return in_be32(p);
  96 }
  97
  98 static u32 _fsl_readl_le(const unsigned __iomem *p)
  99 {
 100         return in_le32(p);
 101 }
 102
 103 static void _fsl_writel_be(u32 v, unsigned __iomem *p)
 104 {
 105         out_be32(p, v);
 106 }
 107
 108 static void _fsl_writel_le(u32 v, unsigned __iomem *p)
 109 {
 110         out_le32(p, v);
 111 }
 112
 113 static u32 (*_fsl_readl)(const unsigned __iomem *p);
 114 static void (*_fsl_writel)(u32 v, unsigned __iomem *p);
 115
 116 #define fsl_readl(p)            (*_fsl_readl)((p))
 117 #define fsl_writel(v, p)        (*_fsl_writel)((v), (p))
 118
 119 static inline void fsl_set_accessors(struct fsl_usb2_platform_data *pdata)
 120 {
 121         if (pdata->big_endian_mmio) {
 122                 _fsl_readl = _fsl_readl_be;
 123                 _fsl_writel = _fsl_writel_be;
 124         } else {
 125                 _fsl_readl = _fsl_readl_le;
 126                 _fsl_writel = _fsl_writel_le;
 127         }
 128 }
 129
 130 static inline u32 cpu_to_hc32(const u32 x)
 131 {
 132         return udc_controller->pdata->big_endian_desc
 133                 ? (__force u32)cpu_to_be32(x)
 134                 : (__force u32)cpu_to_le32(x);
 135 }
 136
 137 static inline u32 hc32_to_cpu(const u32 x)
 138 {
 139         return udc_controller->pdata->big_endian_desc
 140                 ? be32_to_cpu((__force __be32)x)
 141                 : le32_to_cpu((__force __le32)x);
 142 }
 143 #else /* !CONFIG_PPC32 */
 144 static inline void fsl_set_accessors(struct fsl_usb2_platform_data *pdata) {}
 145
 146 #define fsl_readl(addr)         readl(addr)
 147 #define fsl_writel(val32, addr) writel(val32, addr)
 148 #define cpu_to_hc32(x)          cpu_to_le32(x)
 149 #define hc32_to_cpu(x)          le32_to_cpu(x)
 150 #endif /* CONFIG_PPC32 */
 151
 152 /********************************************************************
 153  *      Internal Used Function
 154 ********************************************************************/
 155 /*-----------------------------------------------------------------
 156  * done() - retire a request; caller blocked irqs
 157  * @status : request status to be set, only works when
 158  *      request is still in progress.
 159  *--------------------------------------------------------------*/
 160 static void done(struct fsl_ep *ep, struct fsl_req *req, int status)
 161 {
 162         struct fsl_udc *udc = NULL;
 163         unsigned char stopped = ep->stopped;
 164         struct ep_td_struct *curr_td, *next_td;
 165         int j;
 166
 167         udc = (struct fsl_udc *)ep->udc;
 168         /* Removed the req from fsl_ep->queue */
 169         list_del_init(&req->queue);
 170
 171         /* req.status should be set as -EINPROGRESS in ep_queue() */
 172         if (req->req.status == -EINPROGRESS)
 173                 req->req.status = status;
 174         else
 175                 status = req->req.status;
 176
 177         /* Free dtd for the request */
 178         next_td = req->head;
 179         for (j = 0; j < req->dtd_count; j++) {
 180                 curr_td = next_td;
 181                 if (j != req->dtd_count - 1) {
 182                         next_td = curr_td->next_td_virt;
 183                 }
 184                 dma_pool_free(udc->td_pool, curr_td, curr_td->td_dma);
 185         }
 186
 187         if (req->mapped) {
 188                 dma_unmap_single(ep->udc->gadget.dev.parent,
 189                         req->req.dma, req->req.length,
 190                         ep_is_in(ep)
 191                                 ? DMA_TO_DEVICE
 192                                 : DMA_FROM_DEVICE);
 193                 req->req.dma = DMA_ADDR_INVALID;
 194                 req->mapped = 0;
 195         } else
 196                 dma_sync_single_for_cpu(ep->udc->gadget.dev.parent,
 197                         req->req.dma, req->req.length,
 198                         ep_is_in(ep)
 199                                 ? DMA_TO_DEVICE
 200                                 : DMA_FROM_DEVICE);
 201
 202         if (status && (status != -ESHUTDOWN))
 203                 VDBG("complete %s req %p stat %d len %u/%u",
 204                         ep->ep.name, &req->req, status,
 205                         req->req.actual, req->req.length);
 206
 207         ep->stopped = 1;
 208
 209         spin_unlock(&ep->udc->lock);
 210         /* complete() is from gadget layer,
 211          * eg fsg->bulk_in_complete() */
 212         if (req->req.complete)
 213                 req->req.complete(&ep->ep, &req->req);
 214
 215         spin_lock(&ep->udc->lock);
 216         ep->stopped = stopped;
 217 }
 218
 219 /*-----------------------------------------------------------------
 220  * nuke(): delete all requests related to this ep
 221  * called with spinlock held
 222  *--------------------------------------------------------------*/
 223 static void nuke(struct fsl_ep *ep, int status)
 224 {
 225         ep->stopped = 1;
 226
 227         /* Flush fifo */
 228         fsl_ep_fifo_flush(&ep->ep);
 229
 230         /* Whether this eq has request linked */
 231         while (!list_empty(&ep->queue)) {
 232                 struct fsl_req *req = NULL;
 233
 234                 req = list_entry(ep->queue.next, struct fsl_req, queue);
 235                 done(ep, req, status);
 236         }
 237 }
 238
 239 /*------------------------------------------------------------------
 240         Internal Hardware related function
 241  ------------------------------------------------------------------*/
 242
 243 static int dr_controller_setup(struct fsl_udc *udc)
 244 {
 245         unsigned int tmp, portctrl, ep_num;
 246         unsigned int max_no_of_ep;
 247 #ifndef CONFIG_ARCH_MXC
 248         unsigned int ctrl;
 249 #endif
 250         unsigned long timeout;
 251 #define FSL_UDC_RESET_TIMEOUT 1000
 252
 253         /* Config PHY interface */
 254         portctrl = fsl_readl(&dr_regs->portsc1);
 255         portctrl &= ~(PORTSCX_PHY_TYPE_SEL | PORTSCX_PORT_WIDTH);
 256         switch (udc->phy_mode) {
 257         case FSL_USB2_PHY_ULPI:
 258                 portctrl |= PORTSCX_PTS_ULPI;
 259                 break;
 260         case FSL_USB2_PHY_UTMI_WIDE:
 261                 portctrl |= PORTSCX_PTW_16BIT;
 262                 /* fall through */
 263         case FSL_USB2_PHY_UTMI:
 264                 portctrl |= PORTSCX_PTS_UTMI;
 265                 break;
 266         case FSL_USB2_PHY_SERIAL:
 267                 portctrl |= PORTSCX_PTS_FSLS;
 268                 break;
 269         default:
 270                 return -EINVAL;
 271         }
 272         fsl_writel(portctrl, &dr_regs->portsc1);
 273
 274         /* Stop and reset the usb controller */
 275         tmp = fsl_readl(&dr_regs->usbcmd);
 276         tmp &= ~USB_CMD_RUN_STOP;
 277         fsl_writel(tmp, &dr_regs->usbcmd);
 278
 279         tmp = fsl_readl(&dr_regs->usbcmd);
 280         tmp |= USB_CMD_CTRL_RESET;
 281         fsl_writel(tmp, &dr_regs->usbcmd);
 282
 283         /* Wait for reset to complete */
 284         timeout = jiffies + FSL_UDC_RESET_TIMEOUT;
 285         while (fsl_readl(&dr_regs->usbcmd) & USB_CMD_CTRL_RESET) {
 286                 if (time_after(jiffies, timeout)) {
 287                         ERR("udc reset timeout!\n");
 288                         return -ETIMEDOUT;
 289                 }
 290                 cpu_relax();
 291         }
 292
 293         /* Set the controller as device mode */
 294         tmp = fsl_readl(&dr_regs->usbmode);
 295         tmp &= ~USB_MODE_CTRL_MODE_MASK;        /* clear mode bits */
 296         tmp |= USB_MODE_CTRL_MODE_DEVICE;
 297         /* Disable Setup Lockout */
 298         tmp |= USB_MODE_SETUP_LOCK_OFF;
 299         if (udc->pdata->es)
 300                 tmp |= USB_MODE_ES;
 301         fsl_writel(tmp, &dr_regs->usbmode);
 302
 303         /* Clear the setup status */
 304         fsl_writel(0, &dr_regs->usbsts);
 305
 306         tmp = udc->ep_qh_dma;
 307         tmp &= USB_EP_LIST_ADDRESS_MASK;
 308         fsl_writel(tmp, &dr_regs->endpointlistaddr);
 309
 310         VDBG("vir[qh_base] is %p phy[qh_base] is 0x%8x reg is 0x%8x",
 311                 udc->ep_qh, (int)tmp,
 312                 fsl_readl(&dr_regs->endpointlistaddr));
 313
 314         max_no_of_ep = (0x0000001F & fsl_readl(&dr_regs->dccparams));
 315         for (ep_num = 1; ep_num < max_no_of_ep; ep_num++) {
 316                 tmp = fsl_readl(&dr_regs->endptctrl[ep_num]);
 317                 tmp &= ~(EPCTRL_TX_TYPE | EPCTRL_RX_TYPE);
 318                 tmp |= (EPCTRL_EP_TYPE_BULK << EPCTRL_TX_EP_TYPE_SHIFT)
 319                 | (EPCTRL_EP_TYPE_BULK << EPCTRL_RX_EP_TYPE_SHIFT);
 320                 fsl_writel(tmp, &dr_regs->endptctrl[ep_num]);
 321         }
 322         /* Config control enable i/o output, cpu endian register */
 323 #ifndef CONFIG_ARCH_MXC
 324         if (udc->pdata->have_sysif_regs) {
 325                 ctrl = __raw_readl(&usb_sys_regs->control);
 326                 ctrl |= USB_CTRL_IOENB;
 327                 __raw_writel(ctrl, &usb_sys_regs->control);
 328         }
 329 #endif
 330
 331 #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE)
 332         /* Turn on cache snooping hardware, since some PowerPC platforms
 333          * wholly rely on hardware to deal with cache coherent. */
 334
 335         if (udc->pdata->have_sysif_regs) {
 336                 /* Setup Snooping for all the 4GB space */
 337                 tmp = SNOOP_SIZE_2GB;   /* starts from 0x0, size 2G */
 338                 __raw_writel(tmp, &usb_sys_regs->snoop1);
 339                 tmp |= 0x80000000;      /* starts from 0x8000000, size 2G */
 340                 __raw_writel(tmp, &usb_sys_regs->snoop2);
 341         }
 342 #endif
 343
 344         return 0;
 345 }
 346
 347 /* Enable DR irq and set controller to run state */
 348 static void dr_controller_run(struct fsl_udc *udc)
 349 {
 350         u32 temp;
 351
 352         /* Enable DR irq reg */
 353         temp = USB_INTR_INT_EN | USB_INTR_ERR_INT_EN
 354                 | USB_INTR_PTC_DETECT_EN | USB_INTR_RESET_EN
 355                 | USB_INTR_DEVICE_SUSPEND | USB_INTR_SYS_ERR_EN;
 356
 357         fsl_writel(temp, &dr_regs->usbintr);
 358
 359         /* Clear stopped bit */
 360         udc->stopped = 0;
 361
 362         /* Set the controller as device mode */
 363         temp = fsl_readl(&dr_regs->usbmode);
 364         temp |= USB_MODE_CTRL_MODE_DEVICE;
 365         fsl_writel(temp, &dr_regs->usbmode);
 366
 367         /* Set controller to Run */
 368         temp = fsl_readl(&dr_regs->usbcmd);
 369         temp |= USB_CMD_RUN_STOP;
 370         fsl_writel(temp, &dr_regs->usbcmd);
 371 }
 372
 373 static void dr_controller_stop(struct fsl_udc *udc)
 374 {
 375         unsigned int tmp;
 376
 377         pr_debug("%s\n", __func__);
 378
 379         /* if we're in OTG mode, and the Host is currently using the port,
 380          * stop now and don't rip the controller out from under the
 381          * ehci driver
 382          */
 383         if (udc->gadget.is_otg) {
 384                 if (!(fsl_readl(&dr_regs->otgsc) & OTGSC_STS_USB_ID)) {
 385                         pr_debug("udc: Leaving early\n");
 386                         return;
 387                 }
 388         }
 389
 390         /* disable all INTR */
 391         fsl_writel(0, &dr_regs->usbintr);
 392
 393         /* Set stopped bit for isr */
 394         udc->stopped = 1;
 395
 396         /* disable IO output */
 397 /*      usb_sys_regs->control = 0; */
 398
 399         /* set controller to Stop */
 400         tmp = fsl_readl(&dr_regs->usbcmd);
 401         tmp &= ~USB_CMD_RUN_STOP;
 402         fsl_writel(tmp, &dr_regs->usbcmd);
 403 }
 404
 405 static void dr_ep_setup(unsigned char ep_num, unsigned char dir,
 406                         unsigned char ep_type)
 407 {
 408         unsigned int tmp_epctrl = 0;
 409
 410         tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 411         if (dir) {
 412                 if (ep_num)
 413                         tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
 414                 tmp_epctrl |= EPCTRL_TX_ENABLE;
 415                 tmp_epctrl &= ~EPCTRL_TX_TYPE;
 416                 tmp_epctrl |= ((unsigned int)(ep_type)
 417                                 << EPCTRL_TX_EP_TYPE_SHIFT);
 418         } else {
 419                 if (ep_num)
 420                         tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
 421                 tmp_epctrl |= EPCTRL_RX_ENABLE;
 422                 tmp_epctrl &= ~EPCTRL_RX_TYPE;
 423                 tmp_epctrl |= ((unsigned int)(ep_type)
 424                                 << EPCTRL_RX_EP_TYPE_SHIFT);
 425         }
 426
 427         fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
 428 }
 429
 430 static void
 431 dr_ep_change_stall(unsigned char ep_num, unsigned char dir, int value)
 432 {
 433         u32 tmp_epctrl = 0;
 434
 435         tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 436
 437         if (value) {
 438                 /* set the stall bit */
 439                 if (dir)
 440                         tmp_epctrl |= EPCTRL_TX_EP_STALL;
 441                 else
 442                         tmp_epctrl |= EPCTRL_RX_EP_STALL;
 443         } else {
 444                 /* clear the stall bit and reset data toggle */
 445                 if (dir) {
 446                         tmp_epctrl &= ~EPCTRL_TX_EP_STALL;
 447                         tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
 448                 } else {
 449                         tmp_epctrl &= ~EPCTRL_RX_EP_STALL;
 450                         tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
 451                 }
 452         }
 453         fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
 454 }
 455
 456 /* Get stall status of a specific ep
 457    Return: 0: not stalled; 1:stalled */
 458 static int dr_ep_get_stall(unsigned char ep_num, unsigned char dir)
 459 {
 460         u32 epctrl;
 461
 462         epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 463         if (dir)
 464                 return (epctrl & EPCTRL_TX_EP_STALL) ? 1 : 0;
 465         else
 466                 return (epctrl & EPCTRL_RX_EP_STALL) ? 1 : 0;
 467 }
 468
 469 /********************************************************************
 470         Internal Structure Build up functions
 471 ********************************************************************/
 472
 473 /*------------------------------------------------------------------
 474 * struct_ep_qh_setup(): set the Endpoint Capabilites field of QH
 475  * @zlt: Zero Length Termination Select (1: disable; 0: enable)
 476  * @mult: Mult field
 477  ------------------------------------------------------------------*/
 478 static void struct_ep_qh_setup(struct fsl_udc *udc, unsigned char ep_num,
 479                 unsigned char dir, unsigned char ep_type,
 480                 unsigned int max_pkt_len,
 481                 unsigned int zlt, unsigned char mult)
 482 {
 483         struct ep_queue_head *p_QH = &udc->ep_qh[2 * ep_num + dir];
 484         unsigned int tmp = 0;
 485
 486         /* set the Endpoint Capabilites in QH */
 487         switch (ep_type) {
 488         case USB_ENDPOINT_XFER_CONTROL:
 489                 /* Interrupt On Setup (IOS). for control ep  */
 490                 tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
 491                         | EP_QUEUE_HEAD_IOS;
 492                 break;
 493         case USB_ENDPOINT_XFER_ISOC:
 494                 tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
 495                         | (mult << EP_QUEUE_HEAD_MULT_POS);
 496                 break;
 497         case USB_ENDPOINT_XFER_BULK:
 498         case USB_ENDPOINT_XFER_INT:
 499                 tmp = max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS;
 500                 break;
 501         default:
 502                 VDBG("error ep type is %d", ep_type);
 503                 return;
 504         }
 505         if (zlt)
 506                 tmp |= EP_QUEUE_HEAD_ZLT_SEL;
 507
 508         p_QH->max_pkt_length = cpu_to_hc32(tmp);
 509         p_QH->next_dtd_ptr = 1;
 510         p_QH->size_ioc_int_sts = 0;
 511 }
 512
 513 /* Setup qh structure and ep register for ep0. */
 514 static void ep0_setup(struct fsl_udc *udc)
 515 {
 516         /* the intialization of an ep includes: fields in QH, Regs,
 517          * fsl_ep struct */
 518         struct_ep_qh_setup(udc, 0, USB_RECV, USB_ENDPOINT_XFER_CONTROL,
 519                         USB_MAX_CTRL_PAYLOAD, 0, 0);
 520         struct_ep_qh_setup(udc, 0, USB_SEND, USB_ENDPOINT_XFER_CONTROL,
 521                         USB_MAX_CTRL_PAYLOAD, 0, 0);
 522         dr_ep_setup(0, USB_RECV, USB_ENDPOINT_XFER_CONTROL);
 523         dr_ep_setup(0, USB_SEND, USB_ENDPOINT_XFER_CONTROL);
 524
 525         return;
 526
 527 }
 528
 529 /***********************************************************************
 530                 Endpoint Management Functions
 531 ***********************************************************************/
 532
 533 /*-------------------------------------------------------------------------
 534  * when configurations are set, or when interface settings change
 535  * for example the do_set_interface() in gadget layer,
 536  * the driver will enable or disable the relevant endpoints
 537  * ep0 doesn't use this routine. It is always enabled.
 538 -------------------------------------------------------------------------*/
 539 static int fsl_ep_enable(struct usb_ep *_ep,
 540                 const struct usb_endpoint_descriptor *desc)
 541 {
 542         struct fsl_udc *udc = NULL;
 543         struct fsl_ep *ep = NULL;
 544         unsigned short max = 0;
 545         unsigned char mult = 0, zlt;
 546         int retval = -EINVAL;
 547         unsigned long flags = 0;
 548
 549         ep = container_of(_ep, struct fsl_ep, ep);
 550
 551         /* catch various bogus parameters */
 552         if (!_ep || !desc || ep->ep.desc
 553                         || (desc->bDescriptorType != USB_DT_ENDPOINT))
 554                 return -EINVAL;
 555
 556         udc = ep->udc;
 557
 558         if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN))
 559                 return -ESHUTDOWN;
 560
 561         max = usb_endpoint_maxp(desc);
 562
 563         /* Disable automatic zlp generation.  Driver is responsible to indicate
 564          * explicitly through req->req.zero.  This is needed to enable multi-td
 565          * request. */
 566         zlt = 1;
 567
 568         /* Assume the max packet size from gadget is always correct */
 569         switch (desc->bmAttributes & 0x03) {
 570         case USB_ENDPOINT_XFER_CONTROL:
 571         case USB_ENDPOINT_XFER_BULK:
 572         case USB_ENDPOINT_XFER_INT:
 573                 /* mult = 0.  Execute N Transactions as demonstrated by
 574                  * the USB variable length packet protocol where N is
 575                  * computed using the Maximum Packet Length (dQH) and
 576                  * the Total Bytes field (dTD) */
 577                 mult = 0;
 578                 break;
 579         case USB_ENDPOINT_XFER_ISOC:
 580                 /* Calculate transactions needed for high bandwidth iso */
 581                 mult = (unsigned char)(1 + ((max >> 11) & 0x03));
 582                 max = max & 0x7ff;      /* bit 0~10 */
 583                 /* 3 transactions at most */
 584                 if (mult > 3)
 585                         goto en_done;
 586                 break;
 587         default:
 588                 goto en_done;
 589         }
 590
 591         spin_lock_irqsave(&udc->lock, flags);
 592         ep->ep.maxpacket = max;
 593         ep->ep.desc = desc;
 594         ep->stopped = 0;
 595
 596         /* Controller related setup */
 597         /* Init EPx Queue Head (Ep Capabilites field in QH
 598          * according to max, zlt, mult) */
 599         struct_ep_qh_setup(udc, (unsigned char) ep_index(ep),
 600                         (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
 601                                         ?  USB_SEND : USB_RECV),
 602                         (unsigned char) (desc->bmAttributes
 603                                         & USB_ENDPOINT_XFERTYPE_MASK),
 604                         max, zlt, mult);
 605
 606         /* Init endpoint ctrl register */
 607         dr_ep_setup((unsigned char) ep_index(ep),
 608                         (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
 609                                         ? USB_SEND : USB_RECV),
 610                         (unsigned char) (desc->bmAttributes
 611                                         & USB_ENDPOINT_XFERTYPE_MASK));
 612
 613         spin_unlock_irqrestore(&udc->lock, flags);
 614         retval = 0;
 615
 616         VDBG("enabled %s (ep%d%s) maxpacket %d",ep->ep.name,
 617                         ep->ep.desc->bEndpointAddress & 0x0f,
 618                         (desc->bEndpointAddress & USB_DIR_IN)
 619                                 ? "in" : "out", max);
 620 en_done:
 621         return retval;
 622 }
 623
 624 /*---------------------------------------------------------------------
 625  * @ep : the ep being unconfigured. May not be ep0
 626  * Any pending and uncomplete req will complete with status (-ESHUTDOWN)
 627 *---------------------------------------------------------------------*/
 628 static int fsl_ep_disable(struct usb_ep *_ep)
 629 {
 630         struct fsl_udc *udc = NULL;
 631         struct fsl_ep *ep = NULL;
 632         unsigned long flags = 0;
 633         u32 epctrl;
 634         int ep_num;
 635
 636         ep = container_of(_ep, struct fsl_ep, ep);
 637         if (!_ep || !ep->ep.desc) {
 638                 VDBG("%s not enabled", _ep ? ep->ep.name : NULL);
 639                 return -EINVAL;
 640         }
 641
 642         /* disable ep on controller */
 643         ep_num = ep_index(ep);
 644         epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 645         if (ep_is_in(ep)) {
 646                 epctrl &= ~(EPCTRL_TX_ENABLE | EPCTRL_TX_TYPE);
 647                 epctrl |= EPCTRL_EP_TYPE_BULK << EPCTRL_TX_EP_TYPE_SHIFT;
 648         } else {
 649                 epctrl &= ~(EPCTRL_RX_ENABLE | EPCTRL_TX_TYPE);
 650                 epctrl |= EPCTRL_EP_TYPE_BULK << EPCTRL_RX_EP_TYPE_SHIFT;
 651         }
 652         fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
 653
 654         udc = (struct fsl_udc *)ep->udc;
 655         spin_lock_irqsave(&udc->lock, flags);
 656
 657         /* nuke all pending requests (does flush) */
 658         nuke(ep, -ESHUTDOWN);
 659
 660         ep->ep.desc = NULL;
 661         ep->stopped = 1;
 662         spin_unlock_irqrestore(&udc->lock, flags);
 663
 664         VDBG("disabled %s OK", _ep->name);
 665         return 0;
 666 }
 667
 668 /*---------------------------------------------------------------------
 669  * allocate a request object used by this endpoint
 670  * the main operation is to insert the req->queue to the eq->queue
 671  * Returns the request, or null if one could not be allocated
 672 *---------------------------------------------------------------------*/
 673 static struct usb_request *
 674 fsl_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
 675 {
 676         struct fsl_req *req = NULL;
 677
 678         req = kzalloc(sizeof *req, gfp_flags);
 679         if (!req)
 680                 return NULL;
 681
 682         req->req.dma = DMA_ADDR_INVALID;
 683         INIT_LIST_HEAD(&req->queue);
 684
 685         return &req->req;
 686 }
 687
 688 static void fsl_free_request(struct usb_ep *_ep, struct usb_request *_req)
 689 {
 690         struct fsl_req *req = NULL;
 691
 692         req = container_of(_req, struct fsl_req, req);
 693
 694         if (_req)
 695                 kfree(req);
 696 }
 697
 698 /* Actually add a dTD chain to an empty dQH and let go */
 699 static void fsl_prime_ep(struct fsl_ep *ep, struct ep_td_struct *td)
 700 {
 701         struct ep_queue_head *qh = get_qh_by_ep(ep);
 702
 703         /* Write dQH next pointer and terminate bit to 0 */
 704         qh->next_dtd_ptr = cpu_to_hc32(td->td_dma
 705                         & EP_QUEUE_HEAD_NEXT_POINTER_MASK);
 706
 707         /* Clear active and halt bit */
 708         qh->size_ioc_int_sts &= cpu_to_hc32(~(EP_QUEUE_HEAD_STATUS_ACTIVE
 709                                         | EP_QUEUE_HEAD_STATUS_HALT));
 710
 711         /* Ensure that updates to the QH will occur before priming. */
 712         wmb();
 713
 714         /* Prime endpoint by writing correct bit to ENDPTPRIME */
 715         fsl_writel(ep_is_in(ep) ? (1 << (ep_index(ep) + 16))
 716                         : (1 << (ep_index(ep))), &dr_regs->endpointprime);
 717 }
 718
 719 /* Add dTD chain to the dQH of an EP */
 720 static void fsl_queue_td(struct fsl_ep *ep, struct fsl_req *req)
 721 {
 722         u32 temp, bitmask, tmp_stat;
 723
 724         /* VDBG("QH addr Register 0x%8x", dr_regs->endpointlistaddr);
 725         VDBG("ep_qh[%d] addr is 0x%8x", i, (u32)&(ep->udc->ep_qh[i])); */
 726
 727         bitmask = ep_is_in(ep)
 728                 ? (1 << (ep_index(ep) + 16))
 729                 : (1 << (ep_index(ep)));
 730
 731         /* check if the pipe is empty */
 732         if (!(list_empty(&ep->queue)) && !(ep_index(ep) == 0)) {
 733                 /* Add td to the end */
 734                 struct fsl_req *lastreq;
 735                 lastreq = list_entry(ep->queue.prev, struct fsl_req, queue);
 736                 lastreq->tail->next_td_ptr =
 737                         cpu_to_hc32(req->head->td_dma & DTD_ADDR_MASK);
 738                 /* Read prime bit, if 1 goto done */
 739                 if (fsl_readl(&dr_regs->endpointprime) & bitmask)
 740                         return;
 741
 742                 do {
 743                         /* Set ATDTW bit in USBCMD */
 744                         temp = fsl_readl(&dr_regs->usbcmd);
 745                         fsl_writel(temp | USB_CMD_ATDTW, &dr_regs->usbcmd);
 746
 747                         /* Read correct status bit */
 748                         tmp_stat = fsl_readl(&dr_regs->endptstatus) & bitmask;
 749
 750                 } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_ATDTW));
 751
 752                 /* Write ATDTW bit to 0 */
 753                 temp = fsl_readl(&dr_regs->usbcmd);
 754                 fsl_writel(temp & ~USB_CMD_ATDTW, &dr_regs->usbcmd);
 755
 756                 if (tmp_stat)
 757                         return;
 758         }
 759
 760         fsl_prime_ep(ep, req->head);
 761 }
 762
 763 /* Fill in the dTD structure
 764  * @req: request that the transfer belongs to
 765  * @length: return actually data length of the dTD
 766  * @dma: return dma address of the dTD
 767  * @is_last: return flag if it is the last dTD of the request
 768  * return: pointer to the built dTD */
 769 static struct ep_td_struct *fsl_build_dtd(struct fsl_req *req, unsigned *length,
 770                 dma_addr_t *dma, int *is_last, gfp_t gfp_flags)
 771 {
 772         u32 swap_temp;
 773         struct ep_td_struct *dtd;
 774
 775         /* how big will this transfer be? */
 776         *length = min(req->req.length - req->req.actual,
 777                         (unsigned)EP_MAX_LENGTH_TRANSFER);
 778
 779         dtd = dma_pool_alloc(udc_controller->td_pool, gfp_flags, dma);
 780         if (dtd == NULL)
 781                 return dtd;
 782
 783         dtd->td_dma = *dma;
 784         /* Clear reserved field */
 785         swap_temp = hc32_to_cpu(dtd->size_ioc_sts);
 786         swap_temp &= ~DTD_RESERVED_FIELDS;
 787         dtd->size_ioc_sts = cpu_to_hc32(swap_temp);
 788
 789         /* Init all of buffer page pointers */
 790         swap_temp = (u32) (req->req.dma + req->req.actual);
 791         dtd->buff_ptr0 = cpu_to_hc32(swap_temp);
 792         dtd->buff_ptr1 = cpu_to_hc32(swap_temp + 0x1000);
 793         dtd->buff_ptr2 = cpu_to_hc32(swap_temp + 0x2000);
 794         dtd->buff_ptr3 = cpu_to_hc32(swap_temp + 0x3000);
 795         dtd->buff_ptr4 = cpu_to_hc32(swap_temp + 0x4000);
 796
 797         req->req.actual += *length;
 798
 799         /* zlp is needed if req->req.zero is set */
 800         if (req->req.zero) {
 801                 if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0)
 802                         *is_last = 1;
 803                 else
 804                         *is_last = 0;
 805         } else if (req->req.length == req->req.actual)
 806                 *is_last = 1;
 807         else
 808                 *is_last = 0;
 809
 810         if ((*is_last) == 0)
 811                 VDBG("multi-dtd request!");
 812         /* Fill in the transfer size; set active bit */
 813         swap_temp = ((*length << DTD_LENGTH_BIT_POS) | DTD_STATUS_ACTIVE);
 814
 815         /* Enable interrupt for the last dtd of a request */
 816         if (*is_last && !req->req.no_interrupt)
 817                 swap_temp |= DTD_IOC;
 818
 819         dtd->size_ioc_sts = cpu_to_hc32(swap_temp);
 820
 821         mb();
 822
 823         VDBG("length = %d address= 0x%x", *length, (int)*dma);
 824
 825         return dtd;
 826 }
 827
 828 /* Generate dtd chain for a request */
 829 static int fsl_req_to_dtd(struct fsl_req *req, gfp_t gfp_flags)
 830 {
 831         unsigned        count;
 832         int             is_last;
 833         int             is_first =1;
 834         struct ep_td_struct     *last_dtd = NULL, *dtd;
 835         dma_addr_t dma;
 836
 837         do {
 838                 dtd = fsl_build_dtd(req, &count, &dma, &is_last, gfp_flags);
 839                 if (dtd == NULL)
 840                         return -ENOMEM;
 841
 842                 if (is_first) {
 843                         is_first = 0;
 844                         req->head = dtd;
 845                 } else {
 846                         last_dtd->next_td_ptr = cpu_to_hc32(dma);
 847                         last_dtd->next_td_virt = dtd;
 848                 }
 849                 last_dtd = dtd;
 850
 851                 req->dtd_count++;
 852         } while (!is_last);
 853
 854         dtd->next_td_ptr = cpu_to_hc32(DTD_NEXT_TERMINATE);
 855
 856         req->tail = dtd;
 857
 858         return 0;
 859 }
 860
 861 /* queues (submits) an I/O request to an endpoint */
 862 static int
 863 fsl_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
 864 {
 865         struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
 866         struct fsl_req *req = container_of(_req, struct fsl_req, req);
 867         struct fsl_udc *udc;
 868         unsigned long flags;
 869
 870         /* catch various bogus parameters */
 871         if (!_req || !req->req.complete || !req->req.buf
 872                         || !list_empty(&req->queue)) {
 873                 VDBG("%s, bad params", __func__);
 874                 return -EINVAL;
 875         }
 876         if (unlikely(!_ep || !ep->ep.desc)) {
 877                 VDBG("%s, bad ep", __func__);
 878                 return -EINVAL;
 879         }
 880         if (usb_endpoint_xfer_isoc(ep->ep.desc)) {
 881                 if (req->req.length > ep->ep.maxpacket)
 882                         return -EMSGSIZE;
 883         }
 884
 885         udc = ep->udc;
 886         if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
 887                 return -ESHUTDOWN;
 888
 889         req->ep = ep;
 890
 891         /* map virtual address to hardware */
 892         if (req->req.dma == DMA_ADDR_INVALID) {
 893                 req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
 894                                         req->req.buf,
 895                                         req->req.length, ep_is_in(ep)
 896                                                 ? DMA_TO_DEVICE
 897                                                 : DMA_FROM_DEVICE);
 898                 req->mapped = 1;
 899         } else {
 900                 dma_sync_single_for_device(ep->udc->gadget.dev.parent,
 901                                         req->req.dma, req->req.length,
 902                                         ep_is_in(ep)
 903                                                 ? DMA_TO_DEVICE
 904                                                 : DMA_FROM_DEVICE);
 905                 req->mapped = 0;
 906         }
 907
 908         req->req.status = -EINPROGRESS;
 909         req->req.actual = 0;
 910         req->dtd_count = 0;
 911
 912         /* build dtds and push them to device queue */
 913         if (!fsl_req_to_dtd(req, gfp_flags)) {
 914                 spin_lock_irqsave(&udc->lock, flags);
 915                 fsl_queue_td(ep, req);
 916         } else {
 917                 return -ENOMEM;
 918         }
 919
 920         /* irq handler advances the queue */
 921         if (req != NULL)
 922                 list_add_tail(&req->queue, &ep->queue);
 923         spin_unlock_irqrestore(&udc->lock, flags);
 924
 925         return 0;
 926 }
 927
 928 /* dequeues (cancels, unlinks) an I/O request from an endpoint */
 929 static int fsl_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
 930 {
 931         struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
 932         struct fsl_req *req;
 933         unsigned long flags;
 934         int ep_num, stopped, ret = 0;
 935         u32 epctrl;
 936
 937         if (!_ep || !_req)
 938                 return -EINVAL;
 939
 940         spin_lock_irqsave(&ep->udc->lock, flags);
 941         stopped = ep->stopped;
 942
 943         /* Stop the ep before we deal with the queue */
 944         ep->stopped = 1;
 945         ep_num = ep_index(ep);
 946         epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 947         if (ep_is_in(ep))
 948                 epctrl &= ~EPCTRL_TX_ENABLE;
 949         else
 950                 epctrl &= ~EPCTRL_RX_ENABLE;
 951         fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
 952
 953         /* make sure it's actually queued on this endpoint */
 954         list_for_each_entry(req, &ep->queue, queue) {
 955                 if (&req->req == _req)
 956                         break;
 957         }
 958         if (&req->req != _req) {
 959                 ret = -EINVAL;
 960                 goto out;
 961         }
 962
 963         /* The request is in progress, or completed but not dequeued */
 964         if (ep->queue.next == &req->queue) {
 965                 _req->status = -ECONNRESET;
 966                 fsl_ep_fifo_flush(_ep); /* flush current transfer */
 967
 968                 /* The request isn't the last request in this ep queue */
 969                 if (req->queue.next != &ep->queue) {
 970                         struct fsl_req *next_req;
 971
 972                         next_req = list_entry(req->queue.next, struct fsl_req,
 973                                         queue);
 974
 975                         /* prime with dTD of next request */
 976                         fsl_prime_ep(ep, next_req->head);
 977                 }
 978         /* The request hasn't been processed, patch up the TD chain */
 979         } else {
 980                 struct fsl_req *prev_req;
 981
 982                 prev_req = list_entry(req->queue.prev, struct fsl_req, queue);
 983                 prev_req->tail->next_td_ptr = req->tail->next_td_ptr;
 984         }
 985
 986         done(ep, req, -ECONNRESET);
 987
 988         /* Enable EP */
 989 out:    epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 990         if (ep_is_in(ep))
 991                 epctrl |= EPCTRL_TX_ENABLE;
 992         else
 993                 epctrl |= EPCTRL_RX_ENABLE;
 994         fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
 995         ep->stopped = stopped;
 996
 997         spin_unlock_irqrestore(&ep->udc->lock, flags);
 998         return ret;
 999 }
1000
1001 /*-------------------------------------------------------------------------*/
1002
1003 /*-----------------------------------------------------------------
1004  * modify the endpoint halt feature
1005  * @ep: the non-isochronous endpoint being stalled
1006  * @value: 1--set halt  0--clear halt
1007  * Returns zero, or a negative error code.
1008 *----------------------------------------------------------------*/
1009 static int fsl_ep_set_halt(struct usb_ep *_ep, int value)
1010 {
1011         struct fsl_ep *ep = NULL;
1012         unsigned long flags = 0;
1013         int status = -EOPNOTSUPP;       /* operation not supported */
1014         unsigned char ep_dir = 0, ep_num = 0;
1015         struct fsl_udc *udc = NULL;
1016
1017         ep = container_of(_ep, struct fsl_ep, ep);
1018         udc = ep->udc;
1019         if (!_ep || !ep->ep.desc) {
1020                 status = -EINVAL;
1021                 goto out;
1022         }
1023
1024         if (usb_endpoint_xfer_isoc(ep->ep.desc)) {
1025                 status = -EOPNOTSUPP;
1026                 goto out;
1027         }
1028
1029         /* Attempt to halt IN ep will fail if any transfer requests
1030          * are still queue */
1031         if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
1032                 status = -EAGAIN;
1033                 goto out;
1034         }
1035
1036         status = 0;
1037         ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
1038         ep_num = (unsigned char)(ep_index(ep));
1039         spin_lock_irqsave(&ep->udc->lock, flags);
1040         dr_ep_change_stall(ep_num, ep_dir, value);
1041         spin_unlock_irqrestore(&ep->udc->lock, flags);
1042
1043         if (ep_index(ep) == 0) {
1044                 udc->ep0_state = WAIT_FOR_SETUP;
1045                 udc->ep0_dir = 0;
1046         }
1047 out:
1048         VDBG(" %s %s halt stat %d", ep->ep.name,
1049                         value ?  "set" : "clear", status);
1050
1051         return status;
1052 }
1053
1054 static int fsl_ep_fifo_status(struct usb_ep *_ep)
1055 {
1056         struct fsl_ep *ep;
1057         struct fsl_udc *udc;
1058         int size = 0;
1059         u32 bitmask;
1060         struct ep_queue_head *qh;
1061
1062         ep = container_of(_ep, struct fsl_ep, ep);
1063         if (!_ep || (!ep->ep.desc && ep_index(ep) != 0))
1064                 return -ENODEV;
1065
1066         udc = (struct fsl_udc *)ep->udc;
1067
1068         if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
1069                 return -ESHUTDOWN;
1070
1071         qh = get_qh_by_ep(ep);
1072
1073         bitmask = (ep_is_in(ep)) ? (1 << (ep_index(ep) + 16)) :
1074             (1 << (ep_index(ep)));
1075
1076         if (fsl_readl(&dr_regs->endptstatus) & bitmask)
1077                 size = (qh->size_ioc_int_sts & DTD_PACKET_SIZE)
1078                     >> DTD_LENGTH_BIT_POS;
1079
1080         pr_debug("%s %u\n", __func__, size);
1081         return size;
1082 }
1083
1084 static void fsl_ep_fifo_flush(struct usb_ep *_ep)
1085 {
1086         struct fsl_ep *ep;
1087         int ep_num, ep_dir;
1088         u32 bits;
1089         unsigned long timeout;
1090 #define FSL_UDC_FLUSH_TIMEOUT 1000
1091
1092         if (!_ep) {
1093                 return;
1094         } else {
1095                 ep = container_of(_ep, struct fsl_ep, ep);
1096                 if (!ep->ep.desc)
1097                         return;
1098         }
1099         ep_num = ep_index(ep);
1100         ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
1101
1102         if (ep_num == 0)
1103                 bits = (1 << 16) | 1;
1104         else if (ep_dir == USB_SEND)
1105                 bits = 1 << (16 + ep_num);
1106         else
1107                 bits = 1 << ep_num;
1108
1109         timeout = jiffies + FSL_UDC_FLUSH_TIMEOUT;
1110         do {
1111                 fsl_writel(bits, &dr_regs->endptflush);
1112
1113                 /* Wait until flush complete */
1114                 while (fsl_readl(&dr_regs->endptflush)) {
1115                         if (time_after(jiffies, timeout)) {
1116                                 ERR("ep flush timeout\n");
1117                                 return;
1118                         }
1119                         cpu_relax();
1120                 }
1121                 /* See if we need to flush again */
1122         } while (fsl_readl(&dr_regs->endptstatus) & bits);
1123 }
1124
1125 static struct usb_ep_ops fsl_ep_ops = {
1126         .enable = fsl_ep_enable,
1127         .disable = fsl_ep_disable,
1128
1129         .alloc_request = fsl_alloc_request,
1130         .free_request = fsl_free_request,
1131
1132         .queue = fsl_ep_queue,
1133         .dequeue = fsl_ep_dequeue,
1134
1135         .set_halt = fsl_ep_set_halt,
1136         .fifo_status = fsl_ep_fifo_status,
1137         .fifo_flush = fsl_ep_fifo_flush,        /* flush fifo */
1138 };
1139
1140 /*-------------------------------------------------------------------------
1141                 Gadget Driver Layer Operations
1142 -------------------------------------------------------------------------*/
1143
1144 /*----------------------------------------------------------------------
1145  * Get the current frame number (from DR frame_index Reg )
1146  *----------------------------------------------------------------------*/
1147 static int fsl_get_frame(struct usb_gadget *gadget)
1148 {
1149         return (int)(fsl_readl(&dr_regs->frindex) & USB_FRINDEX_MASKS);
1150 }
1151
1152 /*-----------------------------------------------------------------------
1153  * Tries to wake up the host connected to this gadget
1154  -----------------------------------------------------------------------*/
1155 static int fsl_wakeup(struct usb_gadget *gadget)
1156 {
1157         struct fsl_udc *udc = container_of(gadget, struct fsl_udc, gadget);
1158         u32 portsc;
1159
1160         /* Remote wakeup feature not enabled by host */
1161         if (!udc->remote_wakeup)
1162                 return -ENOTSUPP;
1163
1164         portsc = fsl_readl(&dr_regs->portsc1);
1165         /* not suspended? */
1166         if (!(portsc & PORTSCX_PORT_SUSPEND))
1167                 return 0;
1168         /* trigger force resume */
1169         portsc |= PORTSCX_PORT_FORCE_RESUME;
1170         fsl_writel(portsc, &dr_regs->portsc1);
1171         return 0;
1172 }
1173
1174 static int can_pullup(struct fsl_udc *udc)
1175 {
1176         return udc->driver && udc->softconnect && udc->vbus_active;
1177 }
1178
1179 /* Notify controller that VBUS is powered, Called by whatever
1180    detects VBUS sessions */
1181 static int fsl_vbus_session(struct usb_gadget *gadget, int is_active)
1182 {
1183         struct fsl_udc  *udc;
1184         unsigned long   flags;
1185
1186         udc = container_of(gadget, struct fsl_udc, gadget);
1187         spin_lock_irqsave(&udc->lock, flags);
1188         VDBG("VBUS %s", is_active ? "on" : "off");
1189         udc->vbus_active = (is_active != 0);
1190         if (can_pullup(udc))
1191                 fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
1192                                 &dr_regs->usbcmd);
1193         else
1194                 fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
1195                                 &dr_regs->usbcmd);
1196         spin_unlock_irqrestore(&udc->lock, flags);
1197         return 0;
1198 }
1199
1200 /* constrain controller's VBUS power usage
1201  * This call is used by gadget drivers during SET_CONFIGURATION calls,
1202  * reporting how much power the device may consume.  For example, this
1203  * could affect how quickly batteries are recharged.
1204  *
1205  * Returns zero on success, else negative errno.
1206  */
1207 static int fsl_vbus_draw(struct usb_gadget *gadget, unsigned mA)
1208 {
1209         struct fsl_udc *udc;
1210
1211         udc = container_of(gadget, struct fsl_udc, gadget);
1212         if (udc->transceiver)
1213                 return usb_phy_set_power(udc->transceiver, mA);
1214         return -ENOTSUPP;
1215 }
1216
1217 /* Change Data+ pullup status
1218  * this func is used by usb_gadget_connect/disconnet
1219  */
1220 static int fsl_pullup(struct usb_gadget *gadget, int is_on)
1221 {
1222         struct fsl_udc *udc;
1223
1224         udc = container_of(gadget, struct fsl_udc, gadget);
1225         udc->softconnect = (is_on != 0);
1226         if (can_pullup(udc))
1227                 fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
1228                                 &dr_regs->usbcmd);
1229         else
1230                 fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
1231                                 &dr_regs->usbcmd);
1232
1233         return 0;
1234 }
1235
1236 static int fsl_start(struct usb_gadget_driver *driver,
1237                 int (*bind)(struct usb_gadget *));
1238 static int fsl_stop(struct usb_gadget_driver *driver);
1239 /* defined in gadget.h */
1240 static struct usb_gadget_ops fsl_gadget_ops = {
1241         .get_frame = fsl_get_frame,
1242         .wakeup = fsl_wakeup,
1243 /*      .set_selfpowered = fsl_set_selfpowered, */ /* Always selfpowered */
1244         .vbus_session = fsl_vbus_session,
1245         .vbus_draw = fsl_vbus_draw,
1246         .pullup = fsl_pullup,
1247         .start = fsl_start,
1248         .stop = fsl_stop,
1249 };
1250
1251 /* Set protocol stall on ep0, protocol stall will automatically be cleared
1252    on new transaction */
1253 static void ep0stall(struct fsl_udc *udc)
1254 {
1255         u32 tmp;
1256
1257         /* must set tx and rx to stall at the same time */
1258         tmp = fsl_readl(&dr_regs->endptctrl[0]);
1259         tmp |= EPCTRL_TX_EP_STALL | EPCTRL_RX_EP_STALL;
1260         fsl_writel(tmp, &dr_regs->endptctrl[0]);
1261         udc->ep0_state = WAIT_FOR_SETUP;
1262         udc->ep0_dir = 0;
1263 }
1264
1265 /* Prime a status phase for ep0 */
1266 static int ep0_prime_status(struct fsl_udc *udc, int direction)
1267 {
1268         struct fsl_req *req = udc->status_req;
1269         struct fsl_ep *ep;
1270
1271         if (direction == EP_DIR_IN)
1272                 udc->ep0_dir = USB_DIR_IN;
1273         else
1274                 udc->ep0_dir = USB_DIR_OUT;
1275
1276         ep = &udc->eps[0];
1277         if (udc->ep0_state != DATA_STATE_XMIT)
1278                 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1279
1280         req->ep = ep;
1281         req->req.length = 0;
1282         req->req.status = -EINPROGRESS;
1283         req->req.actual = 0;
1284         req->req.complete = NULL;
1285         req->dtd_count = 0;
1286
1287         req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
1288                         req->req.buf, req->req.length,
1289                         ep_is_in(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
1290         req->mapped = 1;
1291
1292         if (fsl_req_to_dtd(req, GFP_ATOMIC) == 0)
1293                 fsl_queue_td(ep, req);
1294         else
1295                 return -ENOMEM;
1296
1297         list_add_tail(&req->queue, &ep->queue);
1298
1299         return 0;
1300 }
1301
1302 static void udc_reset_ep_queue(struct fsl_udc *udc, u8 pipe)
1303 {
1304         struct fsl_ep *ep = get_ep_by_pipe(udc, pipe);
1305
1306         if (ep->name)
1307                 nuke(ep, -ESHUTDOWN);
1308 }
1309
1310 /*
1311  * ch9 Set address
1312  */
1313 static void ch9setaddress(struct fsl_udc *udc, u16 value, u16 index, u16 length)
1314 {
1315         /* Save the new address to device struct */
1316         udc->device_address = (u8) value;
1317         /* Update usb state */
1318         udc->usb_state = USB_STATE_ADDRESS;
1319         /* Status phase */
1320         if (ep0_prime_status(udc, EP_DIR_IN))
1321                 ep0stall(udc);
1322 }
1323
1324 /*
1325  * ch9 Get status
1326  */
1327 static void ch9getstatus(struct fsl_udc *udc, u8 request_type, u16 value,
1328                 u16 index, u16 length)
1329 {
1330         u16 tmp = 0;            /* Status, cpu endian */
1331         struct fsl_req *req;
1332         struct fsl_ep *ep;
1333
1334         ep = &udc->eps[0];
1335
1336         if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1337                 /* Get device status */
1338                 tmp = 1 << USB_DEVICE_SELF_POWERED;
1339                 tmp |= udc->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP;
1340         } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
1341                 /* Get interface status */
1342                 /* We don't have interface information in udc driver */
1343                 tmp = 0;
1344         } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
1345                 /* Get endpoint status */
1346                 struct fsl_ep *target_ep;
1347
1348                 target_ep = get_ep_by_pipe(udc, get_pipe_by_windex(index));
1349
1350                 /* stall if endpoint doesn't exist */
1351                 if (!target_ep->ep.desc)
1352                         goto stall;
1353                 tmp = dr_ep_get_stall(ep_index(target_ep), ep_is_in(target_ep))
1354                                 << USB_ENDPOINT_HALT;
1355         }
1356
1357         udc->ep0_dir = USB_DIR_IN;
1358         /* Borrow the per device status_req */
1359         req = udc->status_req;
1360         /* Fill in the reqest structure */
1361         *((u16 *) req->req.buf) = cpu_to_le16(tmp);
1362
1363         req->ep = ep;
1364         req->req.length = 2;
1365         req->req.status = -EINPROGRESS;
1366         req->req.actual = 0;
1367         req->req.complete = NULL;
1368         req->dtd_count = 0;
1369
1370         req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
1371                                 req->req.buf, req->req.length,
1372                                 ep_is_in(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
1373         req->mapped = 1;
1374
1375         /* prime the data phase */
1376         if ((fsl_req_to_dtd(req, GFP_ATOMIC) == 0))
1377                 fsl_queue_td(ep, req);
1378         else                    /* no mem */
1379                 goto stall;
1380
1381         list_add_tail(&req->queue, &ep->queue);
1382         udc->ep0_state = DATA_STATE_XMIT;
1383         if (ep0_prime_status(udc, EP_DIR_OUT))
1384                 ep0stall(udc);
1385
1386         return;
1387 stall:
1388         ep0stall(udc);
1389 }
1390
1391 static void setup_received_irq(struct fsl_udc *udc,
1392                 struct usb_ctrlrequest *setup)
1393 {
1394         u16 wValue = le16_to_cpu(setup->wValue);
1395         u16 wIndex = le16_to_cpu(setup->wIndex);
1396         u16 wLength = le16_to_cpu(setup->wLength);
1397
1398         udc_reset_ep_queue(udc, 0);
1399
1400         /* We process some stardard setup requests here */
1401         switch (setup->bRequest) {
1402         case USB_REQ_GET_STATUS:
1403                 /* Data+Status phase from udc */
1404                 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
1405                                         != (USB_DIR_IN | USB_TYPE_STANDARD))
1406                         break;
1407                 ch9getstatus(udc, setup->bRequestType, wValue, wIndex, wLength);
1408                 return;
1409
1410         case USB_REQ_SET_ADDRESS:
1411                 /* Status phase from udc */
1412                 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD
1413                                                 | USB_RECIP_DEVICE))
1414                         break;
1415                 ch9setaddress(udc, wValue, wIndex, wLength);
1416                 return;
1417
1418         case USB_REQ_CLEAR_FEATURE:
1419         case USB_REQ_SET_FEATURE:
1420                 /* Status phase from udc */
1421         {
1422                 int rc = -EOPNOTSUPP;
1423                 u16 ptc = 0;
1424
1425                 if ((setup->bRequestType & (USB_RECIP_MASK | USB_TYPE_MASK))
1426                                 == (USB_RECIP_ENDPOINT | USB_TYPE_STANDARD)) {
1427                         int pipe = get_pipe_by_windex(wIndex);
1428                         struct fsl_ep *ep;
1429
1430                         if (wValue != 0 || wLength != 0 || pipe >= udc->max_ep)
1431                                 break;
1432                         ep = get_ep_by_pipe(udc, pipe);
1433
1434                         spin_unlock(&udc->lock);
1435                         rc = fsl_ep_set_halt(&ep->ep,
1436                                         (setup->bRequest == USB_REQ_SET_FEATURE)
1437                                                 ? 1 : 0);
1438                         spin_lock(&udc->lock);
1439
1440                 } else if ((setup->bRequestType & (USB_RECIP_MASK
1441                                 | USB_TYPE_MASK)) == (USB_RECIP_DEVICE
1442                                 | USB_TYPE_STANDARD)) {
1443                         /* Note: The driver has not include OTG support yet.
1444                          * This will be set when OTG support is added */
1445                         if (wValue == USB_DEVICE_TEST_MODE)
1446                                 ptc = wIndex >> 8;
1447                         else if (gadget_is_otg(&udc->gadget)) {
1448                                 if (setup->bRequest ==
1449                                     USB_DEVICE_B_HNP_ENABLE)
1450                                         udc->gadget.b_hnp_enable = 1;
1451                                 else if (setup->bRequest ==
1452                                          USB_DEVICE_A_HNP_SUPPORT)
1453                                         udc->gadget.a_hnp_support = 1;
1454                                 else if (setup->bRequest ==
1455                                          USB_DEVICE_A_ALT_HNP_SUPPORT)
1456                                         udc->gadget.a_alt_hnp_support = 1;
1457                         }
1458                         rc = 0;
1459                 } else
1460                         break;
1461
1462                 if (rc == 0) {
1463                         if (ep0_prime_status(udc, EP_DIR_IN))
1464                                 ep0stall(udc);
1465                 }
1466                 if (ptc) {
1467                         u32 tmp;
1468
1469                         mdelay(10);
1470                         tmp = fsl_readl(&dr_regs->portsc1) | (ptc << 16);
1471                         fsl_writel(tmp, &dr_regs->portsc1);
1472                         printk(KERN_INFO "udc: switch to test mode %d.\n", ptc);
1473                 }
1474
1475                 return;
1476         }
1477
1478         default:
1479                 break;
1480         }
1481
1482         /* Requests handled by gadget */
1483         if (wLength) {
1484                 /* Data phase from gadget, status phase from udc */
1485                 udc->ep0_dir = (setup->bRequestType & USB_DIR_IN)
1486                                 ?  USB_DIR_IN : USB_DIR_OUT;
1487                 spin_unlock(&udc->lock);
1488                 if (udc->driver->setup(&udc->gadget,
1489                                 &udc->local_setup_buff) < 0)
1490                         ep0stall(udc);
1491                 spin_lock(&udc->lock);
1492                 udc->ep0_state = (setup->bRequestType & USB_DIR_IN)
1493                                 ?  DATA_STATE_XMIT : DATA_STATE_RECV;
1494                 /*
1495                  * If the data stage is IN, send status prime immediately.
1496                  * See 2.0 Spec chapter 8.5.3.3 for detail.
1497                  */
1498                 if (udc->ep0_state == DATA_STATE_XMIT)
1499                         if (ep0_prime_status(udc, EP_DIR_OUT))
1500                                 ep0stall(udc);
1501
1502         } else {
1503                 /* No data phase, IN status from gadget */
1504                 udc->ep0_dir = USB_DIR_IN;
1505                 spin_unlock(&udc->lock);
1506                 if (udc->driver->setup(&udc->gadget,
1507                                 &udc->local_setup_buff) < 0)
1508                         ep0stall(udc);
1509                 spin_lock(&udc->lock);
1510                 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1511         }
1512 }
1513
1514 /* Process request for Data or Status phase of ep0
1515  * prime status phase if needed */
1516 static void ep0_req_complete(struct fsl_udc *udc, struct fsl_ep *ep0,
1517                 struct fsl_req *req)
1518 {
1519         if (udc->usb_state == USB_STATE_ADDRESS) {
1520                 /* Set the new address */
1521                 u32 new_address = (u32) udc->device_address;
1522                 fsl_writel(new_address << USB_DEVICE_ADDRESS_BIT_POS,
1523                                 &dr_regs->deviceaddr);
1524         }
1525
1526         done(ep0, req, 0);
1527
1528         switch (udc->ep0_state) {
1529         case DATA_STATE_XMIT:
1530                 /* already primed at setup_received_irq */
1531                 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1532                 break;
1533         case DATA_STATE_RECV:
1534                 /* send status phase */
1535                 if (ep0_prime_status(udc, EP_DIR_IN))
1536                         ep0stall(udc);
1537                 break;
1538         case WAIT_FOR_OUT_STATUS:
1539                 udc->ep0_state = WAIT_FOR_SETUP;
1540                 break;
1541         case WAIT_FOR_SETUP:
1542                 ERR("Unexpect ep0 packets\n");
1543                 break;
1544         default:
1545                 ep0stall(udc);
1546                 break;
1547         }
1548 }
1549
1550 /* Tripwire mechanism to ensure a setup packet payload is extracted without
1551  * being corrupted by another incoming setup packet */
1552 static void tripwire_handler(struct fsl_udc *udc, u8 ep_num, u8 *buffer_ptr)
1553 {
1554         u32 temp;
1555         struct ep_queue_head *qh;
1556         struct fsl_usb2_platform_data *pdata = udc->pdata;
1557
1558         qh = &udc->ep_qh[ep_num * 2 + EP_DIR_OUT];
1559
1560         /* Clear bit in ENDPTSETUPSTAT */
1561         temp = fsl_readl(&dr_regs->endptsetupstat);
1562         fsl_writel(temp | (1 << ep_num), &dr_regs->endptsetupstat);
1563
1564         /* while a hazard exists when setup package arrives */
1565         do {
1566                 /* Set Setup Tripwire */
1567                 temp = fsl_readl(&dr_regs->usbcmd);
1568                 fsl_writel(temp | USB_CMD_SUTW, &dr_regs->usbcmd);
1569
1570                 /* Copy the setup packet to local buffer */
1571                 if (pdata->le_setup_buf) {
1572                         u32 *p = (u32 *)buffer_ptr;
1573                         u32 *s = (u32 *)qh->setup_buffer;
1574
1575                         /* Convert little endian setup buffer to CPU endian */
1576                         *p++ = le32_to_cpu(*s++);
1577                         *p = le32_to_cpu(*s);
1578                 } else {
1579                         memcpy(buffer_ptr, (u8 *) qh->setup_buffer, 8);
1580                 }
1581         } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_SUTW));
1582
1583         /* Clear Setup Tripwire */
1584         temp = fsl_readl(&dr_regs->usbcmd);
1585         fsl_writel(temp & ~USB_CMD_SUTW, &dr_regs->usbcmd);
1586 }
1587
1588 /* process-ep_req(): free the completed Tds for this req */
1589 static int process_ep_req(struct fsl_udc *udc, int pipe,
1590                 struct fsl_req *curr_req)
1591 {
1592         struct ep_td_struct *curr_td;
1593         int     td_complete, actual, remaining_length, j, tmp;
1594         int     status = 0;
1595         int     errors = 0;
1596         struct  ep_queue_head *curr_qh = &udc->ep_qh[pipe];
1597         int direction = pipe % 2;
1598
1599         curr_td = curr_req->head;
1600         td_complete = 0;
1601         actual = curr_req->req.length;
1602
1603         for (j = 0; j < curr_req->dtd_count; j++) {
1604                 remaining_length = (hc32_to_cpu(curr_td->size_ioc_sts)
1605                                         & DTD_PACKET_SIZE)
1606                                 >> DTD_LENGTH_BIT_POS;
1607                 actual -= remaining_length;
1608
1609                 errors = hc32_to_cpu(curr_td->size_ioc_sts);
1610                 if (errors & DTD_ERROR_MASK) {
1611                         if (errors & DTD_STATUS_HALTED) {
1612                                 ERR("dTD error %08x QH=%d\n", errors, pipe);
1613                                 /* Clear the errors and Halt condition */
1614                                 tmp = hc32_to_cpu(curr_qh->size_ioc_int_sts);
1615                                 tmp &= ~errors;
1616                                 curr_qh->size_ioc_int_sts = cpu_to_hc32(tmp);
1617                                 status = -EPIPE;
1618                                 /* FIXME: continue with next queued TD? */
1619
1620                                 break;
1621                         }
1622                         if (errors & DTD_STATUS_DATA_BUFF_ERR) {
1623                                 VDBG("Transfer overflow");
1624                                 status = -EPROTO;
1625                                 break;
1626                         } else if (errors & DTD_STATUS_TRANSACTION_ERR) {
1627                                 VDBG("ISO error");
1628                                 status = -EILSEQ;
1629                                 break;
1630                         } else
1631                                 ERR("Unknown error has occurred (0x%x)!\n",
1632                                         errors);
1633
1634                 } else if (hc32_to_cpu(curr_td->size_ioc_sts)
1635                                 & DTD_STATUS_ACTIVE) {
1636                         VDBG("Request not complete");
1637                         status = REQ_UNCOMPLETE;
1638                         return status;
1639                 } else if (remaining_length) {
1640                         if (direction) {
1641                                 VDBG("Transmit dTD remaining length not zero");
1642                                 status = -EPROTO;
1643                                 break;
1644                         } else {
1645                                 td_complete++;
1646                                 break;
1647                         }
1648                 } else {
1649                         td_complete++;
1650                         VDBG("dTD transmitted successful");
1651                 }
1652
1653                 if (j != curr_req->dtd_count - 1)
1654                         curr_td = (struct ep_td_struct *)curr_td->next_td_virt;
1655         }
1656
1657         if (status)
1658                 return status;
1659
1660         curr_req->req.actual = actual;
1661
1662         return 0;
1663 }
1664
1665 /* Process a DTD completion interrupt */
1666 static void dtd_complete_irq(struct fsl_udc *udc)
1667 {
1668         u32 bit_pos;
1669         int i, ep_num, direction, bit_mask, status;
1670         struct fsl_ep *curr_ep;
1671         struct fsl_req *curr_req, *temp_req;
1672
1673         /* Clear the bits in the register */
1674         bit_pos = fsl_readl(&dr_regs->endptcomplete);
1675         fsl_writel(bit_pos, &dr_regs->endptcomplete);
1676
1677         if (!bit_pos)
1678                 return;
1679
1680         for (i = 0; i < udc->max_ep; i++) {
1681                 ep_num = i >> 1;
1682                 direction = i % 2;
1683
1684                 bit_mask = 1 << (ep_num + 16 * direction);
1685
1686                 if (!(bit_pos & bit_mask))
1687                         continue;
1688
1689                 curr_ep = get_ep_by_pipe(udc, i);
1690
1691                 /* If the ep is configured */
1692                 if (curr_ep->name == NULL) {
1693                         WARNING("Invalid EP?");
1694                         continue;
1695                 }
1696
1697                 /* process the req queue until an uncomplete request */
1698                 list_for_each_entry_safe(curr_req, temp_req, &curr_ep->queue,
1699                                 queue) {
1700                         status = process_ep_req(udc, i, curr_req);
1701
1702                         VDBG("status of process_ep_req= %d, ep = %d",
1703                                         status, ep_num);
1704                         if (status == REQ_UNCOMPLETE)
1705                                 break;
1706                         /* write back status to req */
1707                         curr_req->req.status = status;
1708
1709                         if (ep_num == 0) {
1710                                 ep0_req_complete(udc, curr_ep, curr_req);
1711                                 break;
1712                         } else
1713                                 done(curr_ep, curr_req, status);
1714                 }
1715         }
1716 }
1717
1718 static inline enum usb_device_speed portscx_device_speed(u32 reg)
1719 {
1720         switch (reg & PORTSCX_PORT_SPEED_MASK) {
1721         case PORTSCX_PORT_SPEED_HIGH:
1722                 return USB_SPEED_HIGH;
1723         case PORTSCX_PORT_SPEED_FULL:
1724                 return USB_SPEED_FULL;
1725         case PORTSCX_PORT_SPEED_LOW:
1726                 return USB_SPEED_LOW;
1727         default:
1728                 return USB_SPEED_UNKNOWN;
1729         }
1730 }
1731
1732 /* Process a port change interrupt */
1733 static void port_change_irq(struct fsl_udc *udc)
1734 {
1735         if (udc->bus_reset)
1736                 udc->bus_reset = 0;
1737
1738         /* Bus resetting is finished */
1739         if (!(fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET))
1740                 /* Get the speed */
1741                 udc->gadget.speed =
1742                         portscx_device_speed(fsl_readl(&dr_regs->portsc1));
1743
1744         /* Update USB state */
1745         if (!udc->resume_state)
1746                 udc->usb_state = USB_STATE_DEFAULT;
1747 }
1748
1749 /* Process suspend interrupt */
1750 static void suspend_irq(struct fsl_udc *udc)
1751 {
1752         udc->resume_state = udc->usb_state;
1753         udc->usb_state = USB_STATE_SUSPENDED;
1754
1755         /* report suspend to the driver, serial.c does not support this */
1756         if (udc->driver->suspend)
1757                 udc->driver->suspend(&udc->gadget);
1758 }
1759
1760 static void bus_resume(struct fsl_udc *udc)
1761 {
1762         udc->usb_state = udc->resume_state;
1763         udc->resume_state = 0;
1764
1765         /* report resume to the driver, serial.c does not support this */
1766         if (udc->driver->resume)
1767                 udc->driver->resume(&udc->gadget);
1768 }
1769
1770 /* Clear up all ep queues */
1771 static int reset_queues(struct fsl_udc *udc)
1772 {
1773         u8 pipe;
1774
1775         for (pipe = 0; pipe < udc->max_pipes; pipe++)
1776                 udc_reset_ep_queue(udc, pipe);
1777
1778         /* report disconnect; the driver is already quiesced */
1779         spin_unlock(&udc->lock);
1780         udc->driver->disconnect(&udc->gadget);
1781         spin_lock(&udc->lock);
1782
1783         return 0;
1784 }
1785
1786 /* Process reset interrupt */
1787 static void reset_irq(struct fsl_udc *udc)
1788 {
1789         u32 temp;
1790         unsigned long timeout;
1791
1792         /* Clear the device address */
1793         temp = fsl_readl(&dr_regs->deviceaddr);
1794         fsl_writel(temp & ~USB_DEVICE_ADDRESS_MASK, &dr_regs->deviceaddr);
1795
1796         udc->device_address = 0;
1797
1798         /* Clear usb state */
1799         udc->resume_state = 0;
1800         udc->ep0_dir = 0;
1801         udc->ep0_state = WAIT_FOR_SETUP;
1802         udc->remote_wakeup = 0; /* default to 0 on reset */
1803         udc->gadget.b_hnp_enable = 0;
1804         udc->gadget.a_hnp_support = 0;
1805         udc->gadget.a_alt_hnp_support = 0;
1806
1807         /* Clear all the setup token semaphores */
1808         temp = fsl_readl(&dr_regs->endptsetupstat);
1809         fsl_writel(temp, &dr_regs->endptsetupstat);
1810
1811         /* Clear all the endpoint complete status bits */
1812         temp = fsl_readl(&dr_regs->endptcomplete);
1813         fsl_writel(temp, &dr_regs->endptcomplete);
1814
1815         timeout = jiffies + 100;
1816         while (fsl_readl(&dr_regs->endpointprime)) {
1817                 /* Wait until all endptprime bits cleared */
1818                 if (time_after(jiffies, timeout)) {
1819                         ERR("Timeout for reset\n");
1820                         break;
1821                 }
1822                 cpu_relax();
1823         }
1824
1825         /* Write 1s to the flush register */
1826         fsl_writel(0xffffffff, &dr_regs->endptflush);
1827
1828         if (fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET) {
1829                 VDBG("Bus reset");
1830                 /* Bus is reseting */
1831                 udc->bus_reset = 1;
1832                 /* Reset all the queues, include XD, dTD, EP queue
1833                  * head and TR Queue */
1834                 reset_queues(udc);
1835                 udc->usb_state = USB_STATE_DEFAULT;
1836         } else {
1837                 VDBG("Controller reset");
1838                 /* initialize usb hw reg except for regs for EP, not
1839                  * touch usbintr reg */
1840                 dr_controller_setup(udc);
1841
1842                 /* Reset all internal used Queues */
1843                 reset_queues(udc);
1844
1845                 ep0_setup(udc);
1846
1847                 /* Enable DR IRQ reg, Set Run bit, change udc state */
1848                 dr_controller_run(udc);
1849                 udc->usb_state = USB_STATE_ATTACHED;
1850         }
1851 }
1852
1853 /*
1854  * USB device controller interrupt handler
1855  */
1856 static irqreturn_t fsl_udc_irq(int irq, void *_udc)
1857 {
1858         struct fsl_udc *udc = _udc;
1859         u32 irq_src;
1860         irqreturn_t status = IRQ_NONE;
1861         unsigned long flags;
1862
1863         /* Disable ISR for OTG host mode */
1864         if (udc->stopped)
1865                 return IRQ_NONE;
1866         spin_lock_irqsave(&udc->lock, flags);
1867         irq_src = fsl_readl(&dr_regs->usbsts) & fsl_readl(&dr_regs->usbintr);
1868         /* Clear notification bits */
1869         fsl_writel(irq_src, &dr_regs->usbsts);
1870
1871         /* VDBG("irq_src [0x%8x]", irq_src); */
1872
1873         /* Need to resume? */
1874         if (udc->usb_state == USB_STATE_SUSPENDED)
1875                 if ((fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_SUSPEND) == 0)
1876                         bus_resume(udc);
1877
1878         /* USB Interrupt */
1879         if (irq_src & USB_STS_INT) {
1880                 VDBG("Packet int");
1881                 /* Setup package, we only support ep0 as control ep */
1882                 if (fsl_readl(&dr_regs->endptsetupstat) & EP_SETUP_STATUS_EP0) {
1883                         tripwire_handler(udc, 0,
1884                                         (u8 *) (&udc->local_setup_buff));
1885                         setup_received_irq(udc, &udc->local_setup_buff);
1886                         status = IRQ_HANDLED;
1887                 }
1888
1889                 /* completion of dtd */
1890                 if (fsl_readl(&dr_regs->endptcomplete)) {
1891                         dtd_complete_irq(udc);
1892                         status = IRQ_HANDLED;
1893                 }
1894         }
1895
1896         /* SOF (for ISO transfer) */
1897         if (irq_src & USB_STS_SOF) {
1898                 status = IRQ_HANDLED;
1899         }
1900
1901         /* Port Change */
1902         if (irq_src & USB_STS_PORT_CHANGE) {
1903                 port_change_irq(udc);
1904                 status = IRQ_HANDLED;
1905         }
1906
1907         /* Reset Received */
1908         if (irq_src & USB_STS_RESET) {
1909                 VDBG("reset int");
1910                 reset_irq(udc);
1911                 status = IRQ_HANDLED;
1912         }
1913
1914         /* Sleep Enable (Suspend) */
1915         if (irq_src & USB_STS_SUSPEND) {
1916                 suspend_irq(udc);
1917                 status = IRQ_HANDLED;
1918         }
1919
1920         if (irq_src & (USB_STS_ERR | USB_STS_SYS_ERR)) {
1921                 VDBG("Error IRQ %x", irq_src);
1922         }
1923
1924         spin_unlock_irqrestore(&udc->lock, flags);
1925         return status;
1926 }
1927
1928 /*----------------------------------------------------------------*
1929  * Hook to gadget drivers
1930  * Called by initialization code of gadget drivers
1931 *----------------------------------------------------------------*/
1932 static int fsl_start(struct usb_gadget_driver *driver,
1933                 int (*bind)(struct usb_gadget *))
1934 {
1935         int retval = -ENODEV;
1936         unsigned long flags = 0;
1937
1938         if (!udc_controller)
1939                 return -ENODEV;
1940
1941         if (!driver || driver->max_speed < USB_SPEED_FULL
1942                         || !bind || !driver->disconnect || !driver->setup)
1943                 return -EINVAL;
1944
1945         if (udc_controller->driver)
1946                 return -EBUSY;
1947
1948         /* lock is needed but whether should use this lock or another */
1949         spin_lock_irqsave(&udc_controller->lock, flags);
1950
1951         driver->driver.bus = NULL;
1952         /* hook up the driver */
1953         udc_controller->driver = driver;
1954         udc_controller->gadget.dev.driver = &driver->driver;
1955         spin_unlock_irqrestore(&udc_controller->lock, flags);
1956
1957         /* bind udc driver to gadget driver */
1958         retval = bind(&udc_controller->gadget);
1959         if (retval) {
1960                 VDBG("bind to %s --> %d", driver->driver.name, retval);
1961                 udc_controller->gadget.dev.driver = NULL;
1962                 udc_controller->driver = NULL;
1963                 goto out;
1964         }
1965
1966         if (udc_controller->transceiver) {
1967                 /* Suspend the controller until OTG enable it */
1968                 udc_controller->stopped = 1;
1969                 printk(KERN_INFO "Suspend udc for OTG auto detect\n");
1970
1971                 /* connect to bus through transceiver */
1972                 if (udc_controller->transceiver) {
1973                         retval = otg_set_peripheral(
1974                                         udc_controller->transceiver->otg,
1975                                                     &udc_controller->gadget);
1976                         if (retval < 0) {
1977                                 ERR("can't bind to transceiver\n");
1978                                 driver->unbind(&udc_controller->gadget);
1979                                 udc_controller->gadget.dev.driver = 0;
1980                                 udc_controller->driver = 0;
1981                                 return retval;
1982                         }
1983                 }
1984         } else {
1985                 /* Enable DR IRQ reg and set USBCMD reg Run bit */
1986                 dr_controller_run(udc_controller);
1987                 udc_controller->usb_state = USB_STATE_ATTACHED;
1988                 udc_controller->ep0_state = WAIT_FOR_SETUP;
1989                 udc_controller->ep0_dir = 0;
1990         }
1991         printk(KERN_INFO "%s: bind to driver %s\n",
1992                         udc_controller->gadget.name, driver->driver.name);
1993
1994 out:
1995         if (retval)
1996                 printk(KERN_WARNING "gadget driver register failed %d\n",
1997                        retval);
1998         return retval;
1999 }
2000
2001 /* Disconnect from gadget driver */
2002 static int fsl_stop(struct usb_gadget_driver *driver)
2003 {
2004         struct fsl_ep *loop_ep;
2005         unsigned long flags;
2006
2007         if (!udc_controller)
2008                 return -ENODEV;
2009
2010         if (!driver || driver != udc_controller->driver || !driver->unbind)
2011                 return -EINVAL;
2012
2013         if (udc_controller->transceiver)
2014                 otg_set_peripheral(udc_controller->transceiver->otg, NULL);
2015
2016         /* stop DR, disable intr */
2017         dr_controller_stop(udc_controller);
2018
2019         /* in fact, no needed */
2020         udc_controller->usb_state = USB_STATE_ATTACHED;
2021         udc_controller->ep0_state = WAIT_FOR_SETUP;
2022         udc_controller->ep0_dir = 0;
2023
2024         /* stand operation */
2025         spin_lock_irqsave(&udc_controller->lock, flags);
2026         udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2027         nuke(&udc_controller->eps[0], -ESHUTDOWN);
2028         list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
2029                         ep.ep_list)
2030                 nuke(loop_ep, -ESHUTDOWN);
2031         spin_unlock_irqrestore(&udc_controller->lock, flags);
2032
2033         /* report disconnect; the controller is already quiesced */
2034         driver->disconnect(&udc_controller->gadget);
2035
2036         /* unbind gadget and unhook driver. */
2037         driver->unbind(&udc_controller->gadget);
2038         udc_controller->gadget.dev.driver = NULL;
2039         udc_controller->driver = NULL;
2040
2041         printk(KERN_WARNING "unregistered gadget driver '%s'\n",
2042                driver->driver.name);
2043         return 0;
2044 }
2045
2046 /*-------------------------------------------------------------------------
2047                 PROC File System Support
2048 -------------------------------------------------------------------------*/
2049 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
2050
2051 #include <linux/seq_file.h>
2052
2053 static const char proc_filename[] = "driver/fsl_usb2_udc";
2054
2055 static int fsl_proc_read(char *page, char **start, off_t off, int count,
2056                 int *eof, void *_dev)
2057 {
2058         char *buf = page;
2059         char *next = buf;
2060         unsigned size = count;
2061         unsigned long flags;
2062         int t, i;
2063         u32 tmp_reg;
2064         struct fsl_ep *ep = NULL;
2065         struct fsl_req *req;
2066
2067         struct fsl_udc *udc = udc_controller;
2068         if (off != 0)
2069                 return 0;
2070
2071         spin_lock_irqsave(&udc->lock, flags);
2072
2073         /* ------basic driver information ---- */
2074         t = scnprintf(next, size,
2075                         DRIVER_DESC "\n"
2076                         "%s version: %s\n"
2077                         "Gadget driver: %s\n\n",
2078                         driver_name, DRIVER_VERSION,
2079                         udc->driver ? udc->driver->driver.name : "(none)");
2080         size -= t;
2081         next += t;
2082
2083         /* ------ DR Registers ----- */
2084         tmp_reg = fsl_readl(&dr_regs->usbcmd);
2085         t = scnprintf(next, size,
2086                         "USBCMD reg:\n"
2087                         "SetupTW: %d\n"
2088                         "Run/Stop: %s\n\n",
2089                         (tmp_reg & USB_CMD_SUTW) ? 1 : 0,
2090                         (tmp_reg & USB_CMD_RUN_STOP) ? "Run" : "Stop");
2091         size -= t;
2092         next += t;
2093
2094         tmp_reg = fsl_readl(&dr_regs->usbsts);
2095         t = scnprintf(next, size,
2096                         "USB Status Reg:\n"
2097                         "Dr Suspend: %d Reset Received: %d System Error: %s "
2098                         "USB Error Interrupt: %s\n\n",
2099                         (tmp_reg & USB_STS_SUSPEND) ? 1 : 0,
2100                         (tmp_reg & USB_STS_RESET) ? 1 : 0,
2101                         (tmp_reg & USB_STS_SYS_ERR) ? "Err" : "Normal",
2102                         (tmp_reg & USB_STS_ERR) ? "Err detected" : "No err");
2103         size -= t;
2104         next += t;
2105
2106         tmp_reg = fsl_readl(&dr_regs->usbintr);
2107         t = scnprintf(next, size,
2108                         "USB Intrrupt Enable Reg:\n"
2109                         "Sleep Enable: %d SOF Received Enable: %d "
2110                         "Reset Enable: %d\n"
2111                         "System Error Enable: %d "
2112                         "Port Change Dectected Enable: %d\n"
2113                         "USB Error Intr Enable: %d USB Intr Enable: %d\n\n",
2114                         (tmp_reg & USB_INTR_DEVICE_SUSPEND) ? 1 : 0,
2115                         (tmp_reg & USB_INTR_SOF_EN) ? 1 : 0,
2116                         (tmp_reg & USB_INTR_RESET_EN) ? 1 : 0,
2117                         (tmp_reg & USB_INTR_SYS_ERR_EN) ? 1 : 0,
2118                         (tmp_reg & USB_INTR_PTC_DETECT_EN) ? 1 : 0,
2119                         (tmp_reg & USB_INTR_ERR_INT_EN) ? 1 : 0,
2120                         (tmp_reg & USB_INTR_INT_EN) ? 1 : 0);
2121         size -= t;
2122         next += t;
2123
2124         tmp_reg = fsl_readl(&dr_regs->frindex);
2125         t = scnprintf(next, size,
2126                         "USB Frame Index Reg: Frame Number is 0x%x\n\n",
2127                         (tmp_reg & USB_FRINDEX_MASKS));
2128         size -= t;
2129         next += t;
2130
2131         tmp_reg = fsl_readl(&dr_regs->deviceaddr);
2132         t = scnprintf(next, size,
2133                         "USB Device Address Reg: Device Addr is 0x%x\n\n",
2134                         (tmp_reg & USB_DEVICE_ADDRESS_MASK));
2135         size -= t;
2136         next += t;
2137
2138         tmp_reg = fsl_readl(&dr_regs->endpointlistaddr);
2139         t = scnprintf(next, size,
2140                         "USB Endpoint List Address Reg: "
2141                         "Device Addr is 0x%x\n\n",
2142                         (tmp_reg & USB_EP_LIST_ADDRESS_MASK));
2143         size -= t;
2144         next += t;
2145
2146         tmp_reg = fsl_readl(&dr_regs->portsc1);
2147         t = scnprintf(next, size,
2148                 "USB Port Status&Control Reg:\n"
2149                 "Port Transceiver Type : %s Port Speed: %s\n"
2150                 "PHY Low Power Suspend: %s Port Reset: %s "
2151                 "Port Suspend Mode: %s\n"
2152                 "Over-current Change: %s "
2153                 "Port Enable/Disable Change: %s\n"
2154                 "Port Enabled/Disabled: %s "
2155                 "Current Connect Status: %s\n\n", ( {
2156                         char *s;
2157                         switch (tmp_reg & PORTSCX_PTS_FSLS) {
2158                         case PORTSCX_PTS_UTMI:
2159                                 s = "UTMI"; break;
2160                         case PORTSCX_PTS_ULPI:
2161                                 s = "ULPI "; break;
2162                         case PORTSCX_PTS_FSLS:
2163                                 s = "FS/LS Serial"; break;
2164                         default:
2165                                 s = "None"; break;
2166                         }
2167                         s;} ),
2168                 usb_speed_string(portscx_device_speed(tmp_reg)),
2169                 (tmp_reg & PORTSCX_PHY_LOW_POWER_SPD) ?
2170                 "Normal PHY mode" : "Low power mode",
2171                 (tmp_reg & PORTSCX_PORT_RESET) ? "In Reset" :
2172                 "Not in Reset",
2173                 (tmp_reg & PORTSCX_PORT_SUSPEND) ? "In " : "Not in",
2174                 (tmp_reg & PORTSCX_OVER_CURRENT_CHG) ? "Dected" :
2175                 "No",
2176                 (tmp_reg & PORTSCX_PORT_EN_DIS_CHANGE) ? "Disable" :
2177                 "Not change",
2178                 (tmp_reg & PORTSCX_PORT_ENABLE) ? "Enable" :
2179                 "Not correct",
2180                 (tmp_reg & PORTSCX_CURRENT_CONNECT_STATUS) ?
2181                 "Attached" : "Not-Att");
2182         size -= t;
2183         next += t;
2184
2185         tmp_reg = fsl_readl(&dr_regs->usbmode);
2186         t = scnprintf(next, size,
2187                         "USB Mode Reg: Controller Mode is: %s\n\n", ( {
2188                                 char *s;
2189                                 switch (tmp_reg & USB_MODE_CTRL_MODE_HOST) {
2190                                 case USB_MODE_CTRL_MODE_IDLE:
2191                                         s = "Idle"; break;
2192                                 case USB_MODE_CTRL_MODE_DEVICE:
2193                                         s = "Device Controller"; break;
2194                                 case USB_MODE_CTRL_MODE_HOST:
2195                                         s = "Host Controller"; break;
2196                                 default:
2197                                         s = "None"; break;
2198                                 }
2199                                 s;
2200                         } ));
2201         size -= t;
2202         next += t;
2203
2204         tmp_reg = fsl_readl(&dr_regs->endptsetupstat);
2205         t = scnprintf(next, size,
2206                         "Endpoint Setup Status Reg: SETUP on ep 0x%x\n\n",
2207                         (tmp_reg & EP_SETUP_STATUS_MASK));
2208         size -= t;
2209         next += t;
2210
2211         for (i = 0; i < udc->max_ep / 2; i++) {
2212                 tmp_reg = fsl_readl(&dr_regs->endptctrl[i]);
2213                 t = scnprintf(next, size, "EP Ctrl Reg [0x%x]: = [0x%x]\n",
2214                                 i, tmp_reg);
2215                 size -= t;
2216                 next += t;
2217         }
2218         tmp_reg = fsl_readl(&dr_regs->endpointprime);
2219         t = scnprintf(next, size, "EP Prime Reg = [0x%x]\n\n", tmp_reg);
2220         size -= t;
2221         next += t;
2222
2223 #ifndef CONFIG_ARCH_MXC
2224         if (udc->pdata->have_sysif_regs) {
2225                 tmp_reg = usb_sys_regs->snoop1;
2226                 t = scnprintf(next, size, "Snoop1 Reg : = [0x%x]\n\n", tmp_reg);
2227                 size -= t;
2228                 next += t;
2229
2230                 tmp_reg = usb_sys_regs->control;
2231                 t = scnprintf(next, size, "General Control Reg : = [0x%x]\n\n",
2232                                 tmp_reg);
2233                 size -= t;
2234                 next += t;
2235         }
2236 #endif
2237
2238         /* ------fsl_udc, fsl_ep, fsl_request structure information ----- */
2239         ep = &udc->eps[0];
2240         t = scnprintf(next, size, "For %s Maxpkt is 0x%x index is 0x%x\n",
2241                         ep->ep.name, ep_maxpacket(ep), ep_index(ep));
2242         size -= t;
2243         next += t;
2244
2245         if (list_empty(&ep->queue)) {
2246                 t = scnprintf(next, size, "its req queue is empty\n\n");
2247                 size -= t;
2248                 next += t;
2249         } else {
2250                 list_for_each_entry(req, &ep->queue, queue) {
2251                         t = scnprintf(next, size,
2252                                 "req %p actual 0x%x length 0x%x buf %p\n",
2253                                 &req->req, req->req.actual,
2254                                 req->req.length, req->req.buf);
2255                         size -= t;
2256                         next += t;
2257                 }
2258         }
2259         /* other gadget->eplist ep */
2260         list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
2261                 if (ep->ep.desc) {
2262                         t = scnprintf(next, size,
2263                                         "\nFor %s Maxpkt is 0x%x "
2264                                         "index is 0x%x\n",
2265                                         ep->ep.name, ep_maxpacket(ep),
2266                                         ep_index(ep));
2267                         size -= t;
2268                         next += t;
2269
2270                         if (list_empty(&ep->queue)) {
2271                                 t = scnprintf(next, size,
2272                                                 "its req queue is empty\n\n");
2273                                 size -= t;
2274                                 next += t;
2275                         } else {
2276                                 list_for_each_entry(req, &ep->queue, queue) {
2277                                         t = scnprintf(next, size,
2278                                                 "req %p actual 0x%x length "
2279                                                 "0x%x  buf %p\n",
2280                                                 &req->req, req->req.actual,
2281                                                 req->req.length, req->req.buf);
2282                                         size -= t;
2283                                         next += t;
2284                                         }       /* end for each_entry of ep req */
2285                                 }       /* end for else */
2286                         }       /* end for if(ep->queue) */
2287                 }               /* end (ep->desc) */
2288
2289         spin_unlock_irqrestore(&udc->lock, flags);
2290
2291         *eof = 1;
2292         return count - size;
2293 }
2294
2295 #define create_proc_file()      create_proc_read_entry(proc_filename, \
2296                                 0, NULL, fsl_proc_read, NULL)
2297
2298 #define remove_proc_file()      remove_proc_entry(proc_filename, NULL)
2299
2300 #else                           /* !CONFIG_USB_GADGET_DEBUG_FILES */
2301
2302 #define create_proc_file()      do {} while (0)
2303 #define remove_proc_file()      do {} while (0)
2304
2305 #endif                          /* CONFIG_USB_GADGET_DEBUG_FILES */
2306
2307 /*-------------------------------------------------------------------------*/
2308
2309 /* Release udc structures */
2310 static void fsl_udc_release(struct device *dev)
2311 {
2312         complete(udc_controller->done);
2313         dma_free_coherent(dev->parent, udc_controller->ep_qh_size,
2314                         udc_controller->ep_qh, udc_controller->ep_qh_dma);
2315         kfree(udc_controller);
2316 }
2317
2318 /******************************************************************
2319         Internal structure setup functions
2320 *******************************************************************/
2321 /*------------------------------------------------------------------
2322  * init resource for globle controller
2323  * Return the udc handle on success or NULL on failure
2324  ------------------------------------------------------------------*/
2325 static int __init struct_udc_setup(struct fsl_udc *udc,
2326                 struct platform_device *pdev)
2327 {
2328         struct fsl_usb2_platform_data *pdata;
2329         size_t size;
2330
2331         pdata = pdev->dev.platform_data;
2332         udc->phy_mode = pdata->phy_mode;
2333
2334         udc->eps = kzalloc(sizeof(struct fsl_ep) * udc->max_ep, GFP_KERNEL);
2335         if (!udc->eps) {
2336                 ERR("malloc fsl_ep failed\n");
2337                 return -1;
2338         }
2339
2340         /* initialized QHs, take care of alignment */
2341         size = udc->max_ep * sizeof(struct ep_queue_head);
2342         if (size < QH_ALIGNMENT)
2343                 size = QH_ALIGNMENT;
2344         else if ((size % QH_ALIGNMENT) != 0) {
2345                 size += QH_ALIGNMENT + 1;
2346                 size &= ~(QH_ALIGNMENT - 1);
2347         }
2348         udc->ep_qh = dma_alloc_coherent(&pdev->dev, size,
2349                                         &udc->ep_qh_dma, GFP_KERNEL);
2350         if (!udc->ep_qh) {
2351                 ERR("malloc QHs for udc failed\n");
2352                 kfree(udc->eps);
2353                 return -1;
2354         }
2355
2356         udc->ep_qh_size = size;
2357
2358         /* Initialize ep0 status request structure */
2359         /* FIXME: fsl_alloc_request() ignores ep argument */
2360         udc->status_req = container_of(fsl_alloc_request(NULL, GFP_KERNEL),
2361                         struct fsl_req, req);
2362         /* allocate a small amount of memory to get valid address */
2363         udc->status_req->req.buf = kmalloc(8, GFP_KERNEL);
2364
2365         udc->resume_state = USB_STATE_NOTATTACHED;
2366         udc->usb_state = USB_STATE_POWERED;
2367         udc->ep0_dir = 0;
2368         udc->remote_wakeup = 0; /* default to 0 on reset */
2369
2370         return 0;
2371 }
2372
2373 /*----------------------------------------------------------------
2374  * Setup the fsl_ep struct for eps
2375  * Link fsl_ep->ep to gadget->ep_list
2376  * ep0out is not used so do nothing here
2377  * ep0in should be taken care
2378  *--------------------------------------------------------------*/
2379 static int __init struct_ep_setup(struct fsl_udc *udc, unsigned char index,
2380                 char *name, int link)
2381 {
2382         struct fsl_ep *ep = &udc->eps[index];
2383
2384         ep->udc = udc;
2385         strcpy(ep->name, name);
2386         ep->ep.name = ep->name;
2387
2388         ep->ep.ops = &fsl_ep_ops;
2389         ep->stopped = 0;
2390
2391         /* for ep0: maxP defined in desc
2392          * for other eps, maxP is set by epautoconfig() called by gadget layer
2393          */
2394         ep->ep.maxpacket = (unsigned short) ~0;
2395
2396         /* the queue lists any req for this ep */
2397         INIT_LIST_HEAD(&ep->queue);
2398
2399         /* gagdet.ep_list used for ep_autoconfig so no ep0 */
2400         if (link)
2401                 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2402         ep->gadget = &udc->gadget;
2403         ep->qh = &udc->ep_qh[index];
2404
2405         return 0;
2406 }
2407
2408 /* Driver probe function
2409  * all intialization operations implemented here except enabling usb_intr reg
2410  * board setup should have been done in the platform code
2411  */
2412 static int __init fsl_udc_probe(struct platform_device *pdev)
2413 {
2414         struct fsl_usb2_platform_data *pdata;
2415         struct resource *res;
2416         int ret = -ENODEV;
2417         unsigned int i;
2418         u32 dccparams;
2419
2420         if (strcmp(pdev->name, driver_name)) {
2421                 VDBG("Wrong device");
2422                 return -ENODEV;
2423         }
2424
2425         udc_controller = kzalloc(sizeof(struct fsl_udc), GFP_KERNEL);
2426         if (udc_controller == NULL) {
2427                 ERR("malloc udc failed\n");
2428                 return -ENOMEM;
2429         }
2430
2431         pdata = pdev->dev.platform_data;
2432         udc_controller->pdata = pdata;
2433         spin_lock_init(&udc_controller->lock);
2434         udc_controller->stopped = 1;
2435
2436 #ifdef CONFIG_USB_OTG
2437         if (pdata->operating_mode == FSL_USB2_DR_OTG) {
2438                 udc_controller->transceiver = usb_get_transceiver();
2439                 if (!udc_controller->transceiver) {
2440                         ERR("Can't find OTG driver!\n");
2441                         ret = -ENODEV;
2442                         goto err_kfree;
2443                 }
2444         }
2445 #endif
2446
2447         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2448         if (!res) {
2449                 ret = -ENXIO;
2450                 goto err_kfree;
2451         }
2452
2453         if (pdata->operating_mode == FSL_USB2_DR_DEVICE) {
2454                 if (!request_mem_region(res->start, resource_size(res),
2455                                         driver_name)) {
2456                         ERR("request mem region for %s failed\n", pdev->name);
2457                         ret = -EBUSY;
2458                         goto err_kfree;
2459                 }
2460         }
2461
2462         dr_regs = ioremap(res->start, resource_size(res));
2463         if (!dr_regs) {
2464                 ret = -ENOMEM;
2465                 goto err_release_mem_region;
2466         }
2467
2468         pdata->regs = (void *)dr_regs;
2469
2470         /*
2471          * do platform specific init: check the clock, grab/config pins, etc.
2472          */
2473         if (pdata->init && pdata->init(pdev)) {
2474                 ret = -ENODEV;
2475                 goto err_iounmap_noclk;
2476         }
2477
2478         /* Set accessors only after pdata->init() ! */
2479         fsl_set_accessors(pdata);
2480
2481 #ifndef CONFIG_ARCH_MXC
2482         if (pdata->have_sysif_regs)
2483                 usb_sys_regs = (void *)dr_regs + USB_DR_SYS_OFFSET;
2484 #endif
2485
2486         /* Initialize USB clocks */
2487         ret = fsl_udc_clk_init(pdev);
2488         if (ret < 0)
2489                 goto err_iounmap_noclk;
2490
2491         /* Read Device Controller Capability Parameters register */
2492         dccparams = fsl_readl(&dr_regs->dccparams);
2493         if (!(dccparams & DCCPARAMS_DC)) {
2494                 ERR("This SOC doesn't support device role\n");
2495                 ret = -ENODEV;
2496                 goto err_iounmap;
2497         }
2498         /* Get max device endpoints */
2499         /* DEN is bidirectional ep number, max_ep doubles the number */
2500         udc_controller->max_ep = (dccparams & DCCPARAMS_DEN_MASK) * 2;
2501
2502         udc_controller->irq = platform_get_irq(pdev, 0);
2503         if (!udc_controller->irq) {
2504                 ret = -ENODEV;
2505                 goto err_iounmap;
2506         }
2507
2508         ret = request_irq(udc_controller->irq, fsl_udc_irq, IRQF_SHARED,
2509                         driver_name, udc_controller);
2510         if (ret != 0) {
2511                 ERR("cannot request irq %d err %d\n",
2512                                 udc_controller->irq, ret);
2513                 goto err_iounmap;
2514         }
2515
2516         /* Initialize the udc structure including QH member and other member */
2517         if (struct_udc_setup(udc_controller, pdev)) {
2518                 ERR("Can't initialize udc data structure\n");
2519                 ret = -ENOMEM;
2520                 goto err_free_irq;
2521         }
2522
2523         if (!udc_controller->transceiver) {
2524                 /* initialize usb hw reg except for regs for EP,
2525                  * leave usbintr reg untouched */
2526                 dr_controller_setup(udc_controller);
2527         }
2528
2529         fsl_udc_clk_finalize(pdev);
2530
2531         /* Setup gadget structure */
2532         udc_controller->gadget.ops = &fsl_gadget_ops;
2533         udc_controller->gadget.max_speed = USB_SPEED_HIGH;
2534         udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
2535         INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
2536         udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2537         udc_controller->gadget.name = driver_name;
2538
2539         /* Setup gadget.dev and register with kernel */
2540         dev_set_name(&udc_controller->gadget.dev, "gadget");
2541         udc_controller->gadget.dev.release = fsl_udc_release;
2542         udc_controller->gadget.dev.parent = &pdev->dev;
2543         ret = device_register(&udc_controller->gadget.dev);
2544         if (ret < 0)
2545                 goto err_free_irq;
2546
2547         if (udc_controller->transceiver)
2548                 udc_controller->gadget.is_otg = 1;
2549
2550         /* setup QH and epctrl for ep0 */
2551         ep0_setup(udc_controller);
2552
2553         /* setup udc->eps[] for ep0 */
2554         struct_ep_setup(udc_controller, 0, "ep0", 0);
2555         /* for ep0: the desc defined here;
2556          * for other eps, gadget layer called ep_enable with defined desc
2557          */
2558         udc_controller->eps[0].desc = &fsl_ep0_desc;
2559         udc_controller->eps[0].ep.maxpacket = USB_MAX_CTRL_PAYLOAD;
2560
2561         /* setup the udc->eps[] for non-control endpoints and link
2562          * to gadget.ep_list */
2563         for (i = 1; i < (int)(udc_controller->max_ep / 2); i++) {
2564                 char name[14];
2565
2566                 sprintf(name, "ep%dout", i);
2567                 struct_ep_setup(udc_controller, i * 2, name, 1);
2568                 sprintf(name, "ep%din", i);
2569                 struct_ep_setup(udc_controller, i * 2 + 1, name, 1);
2570         }
2571
2572         /* use dma_pool for TD management */
2573         udc_controller->td_pool = dma_pool_create("udc_td", &pdev->dev,
2574                         sizeof(struct ep_td_struct),
2575                         DTD_ALIGNMENT, UDC_DMA_BOUNDARY);
2576         if (udc_controller->td_pool == NULL) {
2577                 ret = -ENOMEM;
2578                 goto err_unregister;
2579         }
2580
2581         ret = usb_add_gadget_udc(&pdev->dev, &udc_controller->gadget);
2582         if (ret)
2583                 goto err_del_udc;
2584
2585         create_proc_file();
2586         return 0;
2587
2588 err_del_udc:
2589         dma_pool_destroy(udc_controller->td_pool);
2590 err_unregister:
2591         device_unregister(&udc_controller->gadget.dev);
2592 err_free_irq:
2593         free_irq(udc_controller->irq, udc_controller);
2594 err_iounmap:
2595         if (pdata->exit)
2596                 pdata->exit(pdev);
2597         fsl_udc_clk_release();
2598 err_iounmap_noclk:
2599         iounmap(dr_regs);
2600 err_release_mem_region:
2601         if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
2602                 release_mem_region(res->start, resource_size(res));
2603 err_kfree:
2604         kfree(udc_controller);
2605         udc_controller = NULL;
2606         return ret;
2607 }
2608
2609 /* Driver removal function
2610  * Free resources and finish pending transactions
2611  */
2612 static int __exit fsl_udc_remove(struct platform_device *pdev)
2613 {
2614         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2615         struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
2616
2617         DECLARE_COMPLETION(done);
2618
2619         if (!udc_controller)
2620                 return -ENODEV;
2621
2622         usb_del_gadget_udc(&udc_controller->gadget);
2623         udc_controller->done = &done;
2624
2625         fsl_udc_clk_release();
2626
2627         /* DR has been stopped in usb_gadget_unregister_driver() */
2628         remove_proc_file();
2629
2630         /* Free allocated memory */
2631         kfree(udc_controller->status_req->req.buf);
2632         kfree(udc_controller->status_req);
2633         kfree(udc_controller->eps);
2634
2635         dma_pool_destroy(udc_controller->td_pool);
2636         free_irq(udc_controller->irq, udc_controller);
2637         iounmap(dr_regs);
2638         if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
2639                 release_mem_region(res->start, resource_size(res));
2640
2641         device_unregister(&udc_controller->gadget.dev);
2642         /* free udc --wait for the release() finished */
2643         wait_for_completion(&done);
2644
2645         /*
2646          * do platform specific un-initialization:
2647          * release iomux pins, etc.
2648          */
2649         if (pdata->exit)
2650                 pdata->exit(pdev);
2651
2652         return 0;
2653 }
2654
2655 /*-----------------------------------------------------------------
2656  * Modify Power management attributes
2657  * Used by OTG statemachine to disable gadget temporarily
2658  -----------------------------------------------------------------*/
2659 static int fsl_udc_suspend(struct platform_device *pdev, pm_message_t state)
2660 {
2661         dr_controller_stop(udc_controller);
2662         return 0;
2663 }
2664
2665 /*-----------------------------------------------------------------
2666  * Invoked on USB resume. May be called in_interrupt.
2667  * Here we start the DR controller and enable the irq
2668  *-----------------------------------------------------------------*/
2669 static int fsl_udc_resume(struct platform_device *pdev)
2670 {
2671         /* Enable DR irq reg and set controller Run */
2672         if (udc_controller->stopped) {
2673                 dr_controller_setup(udc_controller);
2674                 dr_controller_run(udc_controller);
2675         }
2676         udc_controller->usb_state = USB_STATE_ATTACHED;
2677         udc_controller->ep0_state = WAIT_FOR_SETUP;
2678         udc_controller->ep0_dir = 0;
2679         return 0;
2680 }
2681
2682 static int fsl_udc_otg_suspend(struct device *dev, pm_message_t state)
2683 {
2684         struct fsl_udc *udc = udc_controller;
2685         u32 mode, usbcmd;
2686
2687         mode = fsl_readl(&dr_regs->usbmode) & USB_MODE_CTRL_MODE_MASK;
2688
2689         pr_debug("%s(): mode 0x%x stopped %d\n", __func__, mode, udc->stopped);
2690
2691         /*
2692          * If the controller is already stopped, then this must be a
2693          * PM suspend.  Remember this fact, so that we will leave the
2694          * controller stopped at PM resume time.
2695          */
2696         if (udc->stopped) {
2697                 pr_debug("gadget already stopped, leaving early\n");
2698                 udc->already_stopped = 1;
2699                 return 0;
2700         }
2701
2702         if (mode != USB_MODE_CTRL_MODE_DEVICE) {
2703                 pr_debug("gadget not in device mode, leaving early\n");
2704                 return 0;
2705         }
2706
2707         /* stop the controller */
2708         usbcmd = fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP;
2709         fsl_writel(usbcmd, &dr_regs->usbcmd);
2710
2711         udc->stopped = 1;
2712
2713         pr_info("USB Gadget suspended\n");
2714
2715         return 0;
2716 }
2717
2718 static int fsl_udc_otg_resume(struct device *dev)
2719 {
2720         pr_debug("%s(): stopped %d  already_stopped %d\n", __func__,
2721                  udc_controller->stopped, udc_controller->already_stopped);
2722
2723         /*
2724          * If the controller was stopped at suspend time, then
2725          * don't resume it now.
2726          */
2727         if (udc_controller->already_stopped) {
2728                 udc_controller->already_stopped = 0;
2729                 pr_debug("gadget was already stopped, leaving early\n");
2730                 return 0;
2731         }
2732
2733         pr_info("USB Gadget resume\n");
2734
2735         return fsl_udc_resume(NULL);
2736 }
2737
2738 /*-------------------------------------------------------------------------
2739         Register entry point for the peripheral controller driver
2740 --------------------------------------------------------------------------*/
2741
2742 static struct platform_driver udc_driver = {
2743         .remove  = __exit_p(fsl_udc_remove),
2744         /* these suspend and resume are not usb suspend and resume */
2745         .suspend = fsl_udc_suspend,
2746         .resume  = fsl_udc_resume,
2747         .driver  = {
2748                 .name = (char *)driver_name,
2749                 .owner = THIS_MODULE,
2750                 /* udc suspend/resume called from OTG driver */
2751                 .suspend = fsl_udc_otg_suspend,
2752                 .resume  = fsl_udc_otg_resume,
2753         },
2754 };
2755
2756 static int __init udc_init(void)
2757 {
2758         printk(KERN_INFO "%s (%s)\n", driver_desc, DRIVER_VERSION);
2759         return platform_driver_probe(&udc_driver, fsl_udc_probe);
2760 }
2761
2762 module_init(udc_init);
2763
2764 static void __exit udc_exit(void)
2765 {
2766         platform_driver_unregister(&udc_driver);
2767         printk(KERN_WARNING "%s unregistered\n", driver_desc);
2768 }
2769
2770 module_exit(udc_exit);
2771
2772 MODULE_DESCRIPTION(DRIVER_DESC);
2773 MODULE_AUTHOR(DRIVER_AUTHOR);
2774 MODULE_LICENSE("GPL");
2775 MODULE_ALIAS("platform:fsl-usb2-udc");