drivers/usb/gadget/fsl_udc_core.c

   1 /*
   2  * Copyright (C) 2004-2007,2011-2012 Freescale Semiconductor, Inc.
   3  * All rights reserved.
   4  *
   5  * Author: Li Yang <leoli@freescale.com>
   6  *         Jiang Bo <tanya.jiang@freescale.com>
   7  *
   8  * Description:
   9  * Freescale high-speed USB SOC DR module device controller driver.
  10  * This can be found on MPC8349E/MPC8313E/MPC5121E cpus.
  11  * The driver is previously named as mpc_udc.  Based on bare board
  12  * code from Dave Liu and Shlomi Gridish.
  13  *
  14  * This program is free software; you can redistribute  it and/or modify it
  15  * under  the terms of  the GNU General  Public License as published by the
  16  * Free Software Foundation;  either version 2 of the  License, or (at your
  17  * option) any later version.
  18  */
  19
  20 #undef VERBOSE
  21
  22 #include <linux/module.h>
  23 #include <linux/kernel.h>
  24 #include <linux/ioport.h>
  25 #include <linux/types.h>
  26 #include <linux/errno.h>
  27 #include <linux/err.h>
  28 #include <linux/slab.h>
  29 #include <linux/init.h>
  30 #include <linux/list.h>
  31 #include <linux/interrupt.h>
  32 #include <linux/proc_fs.h>
  33 #include <linux/mm.h>
  34 #include <linux/moduleparam.h>
  35 #include <linux/device.h>
  36 #include <linux/usb/ch9.h>
  37 #include <linux/usb/gadget.h>
  38 #include <linux/usb/otg.h>
  39 #include <linux/dma-mapping.h>
  40 #include <linux/platform_device.h>
  41 #include <linux/fsl_devices.h>
  42 #include <linux/dmapool.h>
  43 #include <linux/delay.h>
  44 #include <linux/of_device.h>
  45
  46 #include <asm/byteorder.h>
  47 #include <asm/io.h>
  48 #include <asm/unaligned.h>
  49 #include <asm/dma.h>
  50
  51 #include "fsl_usb2_udc.h"
  52
  53 #define DRIVER_DESC     "Freescale High-Speed USB SOC Device Controller driver"
  54 #define DRIVER_AUTHOR   "Li Yang/Jiang Bo"
  55 #define DRIVER_VERSION  "Apr 20, 2007"
  56
  57 #define DMA_ADDR_INVALID        (~(dma_addr_t)0)
  58
  59 static const char driver_name[] = "fsl-usb2-udc";
  60 static const char driver_desc[] = DRIVER_DESC;
  61
  62 static struct usb_dr_device *dr_regs;
  63
  64 static struct usb_sys_interface *usb_sys_regs;
  65
  66 /* it is initialized in probe()  */
  67 static struct fsl_udc *udc_controller = NULL;
  68
  69 static const struct usb_endpoint_descriptor
  70 fsl_ep0_desc = {
  71         .bLength =              USB_DT_ENDPOINT_SIZE,
  72         .bDescriptorType =      USB_DT_ENDPOINT,
  73         .bEndpointAddress =     0,
  74         .bmAttributes =         USB_ENDPOINT_XFER_CONTROL,
  75         .wMaxPacketSize =       USB_MAX_CTRL_PAYLOAD,
  76 };
  77
  78 static void fsl_ep_fifo_flush(struct usb_ep *_ep);
  79
  80 #ifdef CONFIG_PPC32
  81 /*
  82  * On some SoCs, the USB controller registers can be big or little endian,
  83  * depending on the version of the chip. In order to be able to run the
  84  * same kernel binary on 2 different versions of an SoC, the BE/LE decision
  85  * must be made at run time. _fsl_readl and fsl_writel are pointers to the
  86  * BE or LE readl() and writel() functions, and fsl_readl() and fsl_writel()
  87  * call through those pointers. Platform code for SoCs that have BE USB
  88  * registers should set pdata->big_endian_mmio flag.
  89  *
  90  * This also applies to controller-to-cpu accessors for the USB descriptors,
  91  * since their endianness is also SoC dependant. Platform code for SoCs that
  92  * have BE USB descriptors should set pdata->big_endian_desc flag.
  93  */
  94 static u32 _fsl_readl_be(const unsigned __iomem *p)
  95 {
  96         return in_be32(p);
  97 }
  98
  99 static u32 _fsl_readl_le(const unsigned __iomem *p)
 100 {
 101         return in_le32(p);
 102 }
 103
 104 static void _fsl_writel_be(u32 v, unsigned __iomem *p)
 105 {
 106         out_be32(p, v);
 107 }
 108
 109 static void _fsl_writel_le(u32 v, unsigned __iomem *p)
 110 {
 111         out_le32(p, v);
 112 }
 113
 114 static u32 (*_fsl_readl)(const unsigned __iomem *p);
 115 static void (*_fsl_writel)(u32 v, unsigned __iomem *p);
 116
 117 #define fsl_readl(p)            (*_fsl_readl)((p))
 118 #define fsl_writel(v, p)        (*_fsl_writel)((v), (p))
 119
 120 static inline void fsl_set_accessors(struct fsl_usb2_platform_data *pdata)
 121 {
 122         if (pdata->big_endian_mmio) {
 123                 _fsl_readl = _fsl_readl_be;
 124                 _fsl_writel = _fsl_writel_be;
 125         } else {
 126                 _fsl_readl = _fsl_readl_le;
 127                 _fsl_writel = _fsl_writel_le;
 128         }
 129 }
 130
 131 static inline u32 cpu_to_hc32(const u32 x)
 132 {
 133         return udc_controller->pdata->big_endian_desc
 134                 ? (__force u32)cpu_to_be32(x)
 135                 : (__force u32)cpu_to_le32(x);
 136 }
 137
 138 static inline u32 hc32_to_cpu(const u32 x)
 139 {
 140         return udc_controller->pdata->big_endian_desc
 141                 ? be32_to_cpu((__force __be32)x)
 142                 : le32_to_cpu((__force __le32)x);
 143 }
 144 #else /* !CONFIG_PPC32 */
 145 static inline void fsl_set_accessors(struct fsl_usb2_platform_data *pdata) {}
 146
 147 #define fsl_readl(addr)         readl(addr)
 148 #define fsl_writel(val32, addr) writel(val32, addr)
 149 #define cpu_to_hc32(x)          cpu_to_le32(x)
 150 #define hc32_to_cpu(x)          le32_to_cpu(x)
 151 #endif /* CONFIG_PPC32 */
 152
 153 /********************************************************************
 154  *      Internal Used Function
 155 ********************************************************************/
 156 /*-----------------------------------------------------------------
 157  * done() - retire a request; caller blocked irqs
 158  * @status : request status to be set, only works when
 159  *      request is still in progress.
 160  *--------------------------------------------------------------*/
 161 static void done(struct fsl_ep *ep, struct fsl_req *req, int status)
 162 {
 163         struct fsl_udc *udc = NULL;
 164         unsigned char stopped = ep->stopped;
 165         struct ep_td_struct *curr_td, *next_td;
 166         int j;
 167
 168         udc = (struct fsl_udc *)ep->udc;
 169         /* Removed the req from fsl_ep->queue */
 170         list_del_init(&req->queue);
 171
 172         /* req.status should be set as -EINPROGRESS in ep_queue() */
 173         if (req->req.status == -EINPROGRESS)
 174                 req->req.status = status;
 175         else
 176                 status = req->req.status;
 177
 178         /* Free dtd for the request */
 179         next_td = req->head;
 180         for (j = 0; j < req->dtd_count; j++) {
 181                 curr_td = next_td;
 182                 if (j != req->dtd_count - 1) {
 183                         next_td = curr_td->next_td_virt;
 184                 }
 185                 dma_pool_free(udc->td_pool, curr_td, curr_td->td_dma);
 186         }
 187
 188         usb_gadget_unmap_request(&ep->udc->gadget, &req->req, ep_is_in(ep));
 189
 190         if (status && (status != -ESHUTDOWN))
 191                 VDBG("complete %s req %p stat %d len %u/%u",
 192                         ep->ep.name, &req->req, status,
 193                         req->req.actual, req->req.length);
 194
 195         ep->stopped = 1;
 196
 197         spin_unlock(&ep->udc->lock);
 198         /* complete() is from gadget layer,
 199          * eg fsg->bulk_in_complete() */
 200         if (req->req.complete)
 201                 req->req.complete(&ep->ep, &req->req);
 202
 203         spin_lock(&ep->udc->lock);
 204         ep->stopped = stopped;
 205 }
 206
 207 /*-----------------------------------------------------------------
 208  * nuke(): delete all requests related to this ep
 209  * called with spinlock held
 210  *--------------------------------------------------------------*/
 211 static void nuke(struct fsl_ep *ep, int status)
 212 {
 213         ep->stopped = 1;
 214
 215         /* Flush fifo */
 216         fsl_ep_fifo_flush(&ep->ep);
 217
 218         /* Whether this eq has request linked */
 219         while (!list_empty(&ep->queue)) {
 220                 struct fsl_req *req = NULL;
 221
 222                 req = list_entry(ep->queue.next, struct fsl_req, queue);
 223                 done(ep, req, status);
 224         }
 225 }
 226
 227 /*------------------------------------------------------------------
 228         Internal Hardware related function
 229  ------------------------------------------------------------------*/
 230
 231 static int dr_controller_setup(struct fsl_udc *udc)
 232 {
 233         unsigned int tmp, portctrl, ep_num;
 234         unsigned int max_no_of_ep;
 235         unsigned int ctrl;
 236         unsigned long timeout;
 237
 238 #define FSL_UDC_RESET_TIMEOUT 1000
 239
 240         /* Config PHY interface */
 241         portctrl = fsl_readl(&dr_regs->portsc1);
 242         portctrl &= ~(PORTSCX_PHY_TYPE_SEL | PORTSCX_PORT_WIDTH);
 243         switch (udc->phy_mode) {
 244         case FSL_USB2_PHY_ULPI:
 245                 if (udc->pdata->have_sysif_regs) {
 246                         if (udc->pdata->controller_ver) {
 247                                 /* controller version 1.6 or above */
 248                                 ctrl = __raw_readl(&usb_sys_regs->control);
 249                                 ctrl &= ~USB_CTRL_UTMI_PHY_EN;
 250                                 ctrl |= USB_CTRL_USB_EN;
 251                                 __raw_writel(ctrl, &usb_sys_regs->control);
 252                         }
 253                 }
 254                 portctrl |= PORTSCX_PTS_ULPI;
 255                 break;
 256         case FSL_USB2_PHY_UTMI_WIDE:
 257                 portctrl |= PORTSCX_PTW_16BIT;
 258                 /* fall through */
 259         case FSL_USB2_PHY_UTMI:
 260                 if (udc->pdata->have_sysif_regs) {
 261                         if (udc->pdata->controller_ver) {
 262                                 /* controller version 1.6 or above */
 263                                 ctrl = __raw_readl(&usb_sys_regs->control);
 264                                 ctrl |= (USB_CTRL_UTMI_PHY_EN |
 265                                         USB_CTRL_USB_EN);
 266                                 __raw_writel(ctrl, &usb_sys_regs->control);
 267                                 mdelay(FSL_UTMI_PHY_DLY); /* Delay for UTMI
 268                                         PHY CLK to become stable - 10ms*/
 269                         }
 270                 }
 271                 portctrl |= PORTSCX_PTS_UTMI;
 272                 break;
 273         case FSL_USB2_PHY_SERIAL:
 274                 portctrl |= PORTSCX_PTS_FSLS;
 275                 break;
 276         default:
 277                 return -EINVAL;
 278         }
 279         fsl_writel(portctrl, &dr_regs->portsc1);
 280
 281         /* Stop and reset the usb controller */
 282         tmp = fsl_readl(&dr_regs->usbcmd);
 283         tmp &= ~USB_CMD_RUN_STOP;
 284         fsl_writel(tmp, &dr_regs->usbcmd);
 285
 286         tmp = fsl_readl(&dr_regs->usbcmd);
 287         tmp |= USB_CMD_CTRL_RESET;
 288         fsl_writel(tmp, &dr_regs->usbcmd);
 289
 290         /* Wait for reset to complete */
 291         timeout = jiffies + FSL_UDC_RESET_TIMEOUT;
 292         while (fsl_readl(&dr_regs->usbcmd) & USB_CMD_CTRL_RESET) {
 293                 if (time_after(jiffies, timeout)) {
 294                         ERR("udc reset timeout!\n");
 295                         return -ETIMEDOUT;
 296                 }
 297                 cpu_relax();
 298         }
 299
 300         /* Set the controller as device mode */
 301         tmp = fsl_readl(&dr_regs->usbmode);
 302         tmp &= ~USB_MODE_CTRL_MODE_MASK;        /* clear mode bits */
 303         tmp |= USB_MODE_CTRL_MODE_DEVICE;
 304         /* Disable Setup Lockout */
 305         tmp |= USB_MODE_SETUP_LOCK_OFF;
 306         if (udc->pdata->es)
 307                 tmp |= USB_MODE_ES;
 308         fsl_writel(tmp, &dr_regs->usbmode);
 309
 310         /* Clear the setup status */
 311         fsl_writel(0, &dr_regs->usbsts);
 312
 313         tmp = udc->ep_qh_dma;
 314         tmp &= USB_EP_LIST_ADDRESS_MASK;
 315         fsl_writel(tmp, &dr_regs->endpointlistaddr);
 316
 317         VDBG("vir[qh_base] is %p phy[qh_base] is 0x%8x reg is 0x%8x",
 318                 udc->ep_qh, (int)tmp,
 319                 fsl_readl(&dr_regs->endpointlistaddr));
 320
 321         max_no_of_ep = (0x0000001F & fsl_readl(&dr_regs->dccparams));
 322         for (ep_num = 1; ep_num < max_no_of_ep; ep_num++) {
 323                 tmp = fsl_readl(&dr_regs->endptctrl[ep_num]);
 324                 tmp &= ~(EPCTRL_TX_TYPE | EPCTRL_RX_TYPE);
 325                 tmp |= (EPCTRL_EP_TYPE_BULK << EPCTRL_TX_EP_TYPE_SHIFT)
 326                 | (EPCTRL_EP_TYPE_BULK << EPCTRL_RX_EP_TYPE_SHIFT);
 327                 fsl_writel(tmp, &dr_regs->endptctrl[ep_num]);
 328         }
 329         /* Config control enable i/o output, cpu endian register */
 330 #ifndef CONFIG_ARCH_MXC
 331         if (udc->pdata->have_sysif_regs) {
 332                 ctrl = __raw_readl(&usb_sys_regs->control);
 333                 ctrl |= USB_CTRL_IOENB;
 334                 __raw_writel(ctrl, &usb_sys_regs->control);
 335         }
 336 #endif
 337
 338 #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE)
 339         /* Turn on cache snooping hardware, since some PowerPC platforms
 340          * wholly rely on hardware to deal with cache coherent. */
 341
 342         if (udc->pdata->have_sysif_regs) {
 343                 /* Setup Snooping for all the 4GB space */
 344                 tmp = SNOOP_SIZE_2GB;   /* starts from 0x0, size 2G */
 345                 __raw_writel(tmp, &usb_sys_regs->snoop1);
 346                 tmp |= 0x80000000;      /* starts from 0x8000000, size 2G */
 347                 __raw_writel(tmp, &usb_sys_regs->snoop2);
 348         }
 349 #endif
 350
 351         return 0;
 352 }
 353
 354 /* Enable DR irq and set controller to run state */
 355 static void dr_controller_run(struct fsl_udc *udc)
 356 {
 357         u32 temp;
 358
 359         /* Enable DR irq reg */
 360         temp = USB_INTR_INT_EN | USB_INTR_ERR_INT_EN
 361                 | USB_INTR_PTC_DETECT_EN | USB_INTR_RESET_EN
 362                 | USB_INTR_DEVICE_SUSPEND | USB_INTR_SYS_ERR_EN;
 363
 364         fsl_writel(temp, &dr_regs->usbintr);
 365
 366         /* Clear stopped bit */
 367         udc->stopped = 0;
 368
 369         /* Set the controller as device mode */
 370         temp = fsl_readl(&dr_regs->usbmode);
 371         temp |= USB_MODE_CTRL_MODE_DEVICE;
 372         fsl_writel(temp, &dr_regs->usbmode);
 373
 374         /* Set controller to Run */
 375         temp = fsl_readl(&dr_regs->usbcmd);
 376         temp |= USB_CMD_RUN_STOP;
 377         fsl_writel(temp, &dr_regs->usbcmd);
 378 }
 379
 380 static void dr_controller_stop(struct fsl_udc *udc)
 381 {
 382         unsigned int tmp;
 383
 384         pr_debug("%s\n", __func__);
 385
 386         /* if we're in OTG mode, and the Host is currently using the port,
 387          * stop now and don't rip the controller out from under the
 388          * ehci driver
 389          */
 390         if (udc->gadget.is_otg) {
 391                 if (!(fsl_readl(&dr_regs->otgsc) & OTGSC_STS_USB_ID)) {
 392                         pr_debug("udc: Leaving early\n");
 393                         return;
 394                 }
 395         }
 396
 397         /* disable all INTR */
 398         fsl_writel(0, &dr_regs->usbintr);
 399
 400         /* Set stopped bit for isr */
 401         udc->stopped = 1;
 402
 403         /* disable IO output */
 404 /*      usb_sys_regs->control = 0; */
 405
 406         /* set controller to Stop */
 407         tmp = fsl_readl(&dr_regs->usbcmd);
 408         tmp &= ~USB_CMD_RUN_STOP;
 409         fsl_writel(tmp, &dr_regs->usbcmd);
 410 }
 411
 412 static void dr_ep_setup(unsigned char ep_num, unsigned char dir,
 413                         unsigned char ep_type)
 414 {
 415         unsigned int tmp_epctrl = 0;
 416
 417         tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 418         if (dir) {
 419                 if (ep_num)
 420                         tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
 421                 tmp_epctrl |= EPCTRL_TX_ENABLE;
 422                 tmp_epctrl &= ~EPCTRL_TX_TYPE;
 423                 tmp_epctrl |= ((unsigned int)(ep_type)
 424                                 << EPCTRL_TX_EP_TYPE_SHIFT);
 425         } else {
 426                 if (ep_num)
 427                         tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
 428                 tmp_epctrl |= EPCTRL_RX_ENABLE;
 429                 tmp_epctrl &= ~EPCTRL_RX_TYPE;
 430                 tmp_epctrl |= ((unsigned int)(ep_type)
 431                                 << EPCTRL_RX_EP_TYPE_SHIFT);
 432         }
 433
 434         fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
 435 }
 436
 437 static void
 438 dr_ep_change_stall(unsigned char ep_num, unsigned char dir, int value)
 439 {
 440         u32 tmp_epctrl = 0;
 441
 442         tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 443
 444         if (value) {
 445                 /* set the stall bit */
 446                 if (dir)
 447                         tmp_epctrl |= EPCTRL_TX_EP_STALL;
 448                 else
 449                         tmp_epctrl |= EPCTRL_RX_EP_STALL;
 450         } else {
 451                 /* clear the stall bit and reset data toggle */
 452                 if (dir) {
 453                         tmp_epctrl &= ~EPCTRL_TX_EP_STALL;
 454                         tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
 455                 } else {
 456                         tmp_epctrl &= ~EPCTRL_RX_EP_STALL;
 457                         tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
 458                 }
 459         }
 460         fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
 461 }
 462
 463 /* Get stall status of a specific ep
 464    Return: 0: not stalled; 1:stalled */
 465 static int dr_ep_get_stall(unsigned char ep_num, unsigned char dir)
 466 {
 467         u32 epctrl;
 468
 469         epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 470         if (dir)
 471                 return (epctrl & EPCTRL_TX_EP_STALL) ? 1 : 0;
 472         else
 473                 return (epctrl & EPCTRL_RX_EP_STALL) ? 1 : 0;
 474 }
 475
 476 /********************************************************************
 477         Internal Structure Build up functions
 478 ********************************************************************/
 479
 480 /*------------------------------------------------------------------
 481 * struct_ep_qh_setup(): set the Endpoint Capabilites field of QH
 482  * @zlt: Zero Length Termination Select (1: disable; 0: enable)
 483  * @mult: Mult field
 484  ------------------------------------------------------------------*/
 485 static void struct_ep_qh_setup(struct fsl_udc *udc, unsigned char ep_num,
 486                 unsigned char dir, unsigned char ep_type,
 487                 unsigned int max_pkt_len,
 488                 unsigned int zlt, unsigned char mult)
 489 {
 490         struct ep_queue_head *p_QH = &udc->ep_qh[2 * ep_num + dir];
 491         unsigned int tmp = 0;
 492
 493         /* set the Endpoint Capabilites in QH */
 494         switch (ep_type) {
 495         case USB_ENDPOINT_XFER_CONTROL:
 496                 /* Interrupt On Setup (IOS). for control ep  */
 497                 tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
 498                         | EP_QUEUE_HEAD_IOS;
 499                 break;
 500         case USB_ENDPOINT_XFER_ISOC:
 501                 tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
 502                         | (mult << EP_QUEUE_HEAD_MULT_POS);
 503                 break;
 504         case USB_ENDPOINT_XFER_BULK:
 505         case USB_ENDPOINT_XFER_INT:
 506                 tmp = max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS;
 507                 break;
 508         default:
 509                 VDBG("error ep type is %d", ep_type);
 510                 return;
 511         }
 512         if (zlt)
 513                 tmp |= EP_QUEUE_HEAD_ZLT_SEL;
 514
 515         p_QH->max_pkt_length = cpu_to_hc32(tmp);
 516         p_QH->next_dtd_ptr = 1;
 517         p_QH->size_ioc_int_sts = 0;
 518 }
 519
 520 /* Setup qh structure and ep register for ep0. */
 521 static void ep0_setup(struct fsl_udc *udc)
 522 {
 523         /* the intialization of an ep includes: fields in QH, Regs,
 524          * fsl_ep struct */
 525         struct_ep_qh_setup(udc, 0, USB_RECV, USB_ENDPOINT_XFER_CONTROL,
 526                         USB_MAX_CTRL_PAYLOAD, 0, 0);
 527         struct_ep_qh_setup(udc, 0, USB_SEND, USB_ENDPOINT_XFER_CONTROL,
 528                         USB_MAX_CTRL_PAYLOAD, 0, 0);
 529         dr_ep_setup(0, USB_RECV, USB_ENDPOINT_XFER_CONTROL);
 530         dr_ep_setup(0, USB_SEND, USB_ENDPOINT_XFER_CONTROL);
 531
 532         return;
 533
 534 }
 535
 536 /***********************************************************************
 537                 Endpoint Management Functions
 538 ***********************************************************************/
 539
 540 /*-------------------------------------------------------------------------
 541  * when configurations are set, or when interface settings change
 542  * for example the do_set_interface() in gadget layer,
 543  * the driver will enable or disable the relevant endpoints
 544  * ep0 doesn't use this routine. It is always enabled.
 545 -------------------------------------------------------------------------*/
 546 static int fsl_ep_enable(struct usb_ep *_ep,
 547                 const struct usb_endpoint_descriptor *desc)
 548 {
 549         struct fsl_udc *udc = NULL;
 550         struct fsl_ep *ep = NULL;
 551         unsigned short max = 0;
 552         unsigned char mult = 0, zlt;
 553         int retval = -EINVAL;
 554         unsigned long flags = 0;
 555
 556         ep = container_of(_ep, struct fsl_ep, ep);
 557
 558         /* catch various bogus parameters */
 559         if (!_ep || !desc
 560                         || (desc->bDescriptorType != USB_DT_ENDPOINT))
 561                 return -EINVAL;
 562
 563         udc = ep->udc;
 564
 565         if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN))
 566                 return -ESHUTDOWN;
 567
 568         max = usb_endpoint_maxp(desc);
 569
 570         /* Disable automatic zlp generation.  Driver is responsible to indicate
 571          * explicitly through req->req.zero.  This is needed to enable multi-td
 572          * request. */
 573         zlt = 1;
 574
 575         /* Assume the max packet size from gadget is always correct */
 576         switch (desc->bmAttributes & 0x03) {
 577         case USB_ENDPOINT_XFER_CONTROL:
 578         case USB_ENDPOINT_XFER_BULK:
 579         case USB_ENDPOINT_XFER_INT:
 580                 /* mult = 0.  Execute N Transactions as demonstrated by
 581                  * the USB variable length packet protocol where N is
 582                  * computed using the Maximum Packet Length (dQH) and
 583                  * the Total Bytes field (dTD) */
 584                 mult = 0;
 585                 break;
 586         case USB_ENDPOINT_XFER_ISOC:
 587                 /* Calculate transactions needed for high bandwidth iso */
 588                 mult = (unsigned char)(1 + ((max >> 11) & 0x03));
 589                 max = max & 0x7ff;      /* bit 0~10 */
 590                 /* 3 transactions at most */
 591                 if (mult > 3)
 592                         goto en_done;
 593                 break;
 594         default:
 595                 goto en_done;
 596         }
 597
 598         spin_lock_irqsave(&udc->lock, flags);
 599         ep->ep.maxpacket = max;
 600         ep->ep.desc = desc;
 601         ep->stopped = 0;
 602
 603         /* Controller related setup */
 604         /* Init EPx Queue Head (Ep Capabilites field in QH
 605          * according to max, zlt, mult) */
 606         struct_ep_qh_setup(udc, (unsigned char) ep_index(ep),
 607                         (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
 608                                         ?  USB_SEND : USB_RECV),
 609                         (unsigned char) (desc->bmAttributes
 610                                         & USB_ENDPOINT_XFERTYPE_MASK),
 611                         max, zlt, mult);
 612
 613         /* Init endpoint ctrl register */
 614         dr_ep_setup((unsigned char) ep_index(ep),
 615                         (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
 616                                         ? USB_SEND : USB_RECV),
 617                         (unsigned char) (desc->bmAttributes
 618                                         & USB_ENDPOINT_XFERTYPE_MASK));
 619
 620         spin_unlock_irqrestore(&udc->lock, flags);
 621         retval = 0;
 622
 623         VDBG("enabled %s (ep%d%s) maxpacket %d",ep->ep.name,
 624                         ep->ep.desc->bEndpointAddress & 0x0f,
 625                         (desc->bEndpointAddress & USB_DIR_IN)
 626                                 ? "in" : "out", max);
 627 en_done:
 628         return retval;
 629 }
 630
 631 /*---------------------------------------------------------------------
 632  * @ep : the ep being unconfigured. May not be ep0
 633  * Any pending and uncomplete req will complete with status (-ESHUTDOWN)
 634 *---------------------------------------------------------------------*/
 635 static int fsl_ep_disable(struct usb_ep *_ep)
 636 {
 637         struct fsl_udc *udc = NULL;
 638         struct fsl_ep *ep = NULL;
 639         unsigned long flags = 0;
 640         u32 epctrl;
 641         int ep_num;
 642
 643         ep = container_of(_ep, struct fsl_ep, ep);
 644         if (!_ep || !ep->ep.desc) {
 645                 VDBG("%s not enabled", _ep ? ep->ep.name : NULL);
 646                 return -EINVAL;
 647         }
 648
 649         /* disable ep on controller */
 650         ep_num = ep_index(ep);
 651         epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 652         if (ep_is_in(ep)) {
 653                 epctrl &= ~(EPCTRL_TX_ENABLE | EPCTRL_TX_TYPE);
 654                 epctrl |= EPCTRL_EP_TYPE_BULK << EPCTRL_TX_EP_TYPE_SHIFT;
 655         } else {
 656                 epctrl &= ~(EPCTRL_RX_ENABLE | EPCTRL_TX_TYPE);
 657                 epctrl |= EPCTRL_EP_TYPE_BULK << EPCTRL_RX_EP_TYPE_SHIFT;
 658         }
 659         fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
 660
 661         udc = (struct fsl_udc *)ep->udc;
 662         spin_lock_irqsave(&udc->lock, flags);
 663
 664         /* nuke all pending requests (does flush) */
 665         nuke(ep, -ESHUTDOWN);
 666
 667         ep->ep.desc = NULL;
 668         ep->stopped = 1;
 669         spin_unlock_irqrestore(&udc->lock, flags);
 670
 671         VDBG("disabled %s OK", _ep->name);
 672         return 0;
 673 }
 674
 675 /*---------------------------------------------------------------------
 676  * allocate a request object used by this endpoint
 677  * the main operation is to insert the req->queue to the eq->queue
 678  * Returns the request, or null if one could not be allocated
 679 *---------------------------------------------------------------------*/
 680 static struct usb_request *
 681 fsl_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
 682 {
 683         struct fsl_req *req = NULL;
 684
 685         req = kzalloc(sizeof *req, gfp_flags);
 686         if (!req)
 687                 return NULL;
 688
 689         req->req.dma = DMA_ADDR_INVALID;
 690         INIT_LIST_HEAD(&req->queue);
 691
 692         return &req->req;
 693 }
 694
 695 static void fsl_free_request(struct usb_ep *_ep, struct usb_request *_req)
 696 {
 697         struct fsl_req *req = NULL;
 698
 699         req = container_of(_req, struct fsl_req, req);
 700
 701         if (_req)
 702                 kfree(req);
 703 }
 704
 705 /* Actually add a dTD chain to an empty dQH and let go */
 706 static void fsl_prime_ep(struct fsl_ep *ep, struct ep_td_struct *td)
 707 {
 708         struct ep_queue_head *qh = get_qh_by_ep(ep);
 709
 710         /* Write dQH next pointer and terminate bit to 0 */
 711         qh->next_dtd_ptr = cpu_to_hc32(td->td_dma
 712                         & EP_QUEUE_HEAD_NEXT_POINTER_MASK);
 713
 714         /* Clear active and halt bit */
 715         qh->size_ioc_int_sts &= cpu_to_hc32(~(EP_QUEUE_HEAD_STATUS_ACTIVE
 716                                         | EP_QUEUE_HEAD_STATUS_HALT));
 717
 718         /* Ensure that updates to the QH will occur before priming. */
 719         wmb();
 720
 721         /* Prime endpoint by writing correct bit to ENDPTPRIME */
 722         fsl_writel(ep_is_in(ep) ? (1 << (ep_index(ep) + 16))
 723                         : (1 << (ep_index(ep))), &dr_regs->endpointprime);
 724 }
 725
 726 /* Add dTD chain to the dQH of an EP */
 727 static void fsl_queue_td(struct fsl_ep *ep, struct fsl_req *req)
 728 {
 729         u32 temp, bitmask, tmp_stat;
 730
 731         /* VDBG("QH addr Register 0x%8x", dr_regs->endpointlistaddr);
 732         VDBG("ep_qh[%d] addr is 0x%8x", i, (u32)&(ep->udc->ep_qh[i])); */
 733
 734         bitmask = ep_is_in(ep)
 735                 ? (1 << (ep_index(ep) + 16))
 736                 : (1 << (ep_index(ep)));
 737
 738         /* check if the pipe is empty */
 739         if (!(list_empty(&ep->queue)) && !(ep_index(ep) == 0)) {
 740                 /* Add td to the end */
 741                 struct fsl_req *lastreq;
 742                 lastreq = list_entry(ep->queue.prev, struct fsl_req, queue);
 743                 lastreq->tail->next_td_ptr =
 744                         cpu_to_hc32(req->head->td_dma & DTD_ADDR_MASK);
 745                 /* Ensure dTD's next dtd pointer to be updated */
 746                 wmb();
 747                 /* Read prime bit, if 1 goto done */
 748                 if (fsl_readl(&dr_regs->endpointprime) & bitmask)
 749                         return;
 750
 751                 do {
 752                         /* Set ATDTW bit in USBCMD */
 753                         temp = fsl_readl(&dr_regs->usbcmd);
 754                         fsl_writel(temp | USB_CMD_ATDTW, &dr_regs->usbcmd);
 755
 756                         /* Read correct status bit */
 757                         tmp_stat = fsl_readl(&dr_regs->endptstatus) & bitmask;
 758
 759                 } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_ATDTW));
 760
 761                 /* Write ATDTW bit to 0 */
 762                 temp = fsl_readl(&dr_regs->usbcmd);
 763                 fsl_writel(temp & ~USB_CMD_ATDTW, &dr_regs->usbcmd);
 764
 765                 if (tmp_stat)
 766                         return;
 767         }
 768
 769         fsl_prime_ep(ep, req->head);
 770 }
 771
 772 /* Fill in the dTD structure
 773  * @req: request that the transfer belongs to
 774  * @length: return actually data length of the dTD
 775  * @dma: return dma address of the dTD
 776  * @is_last: return flag if it is the last dTD of the request
 777  * return: pointer to the built dTD */
 778 static struct ep_td_struct *fsl_build_dtd(struct fsl_req *req, unsigned *length,
 779                 dma_addr_t *dma, int *is_last, gfp_t gfp_flags)
 780 {
 781         u32 swap_temp;
 782         struct ep_td_struct *dtd;
 783
 784         /* how big will this transfer be? */
 785         *length = min(req->req.length - req->req.actual,
 786                         (unsigned)EP_MAX_LENGTH_TRANSFER);
 787
 788         dtd = dma_pool_alloc(udc_controller->td_pool, gfp_flags, dma);
 789         if (dtd == NULL)
 790                 return dtd;
 791
 792         dtd->td_dma = *dma;
 793         /* Clear reserved field */
 794         swap_temp = hc32_to_cpu(dtd->size_ioc_sts);
 795         swap_temp &= ~DTD_RESERVED_FIELDS;
 796         dtd->size_ioc_sts = cpu_to_hc32(swap_temp);
 797
 798         /* Init all of buffer page pointers */
 799         swap_temp = (u32) (req->req.dma + req->req.actual);
 800         dtd->buff_ptr0 = cpu_to_hc32(swap_temp);
 801         dtd->buff_ptr1 = cpu_to_hc32(swap_temp + 0x1000);
 802         dtd->buff_ptr2 = cpu_to_hc32(swap_temp + 0x2000);
 803         dtd->buff_ptr3 = cpu_to_hc32(swap_temp + 0x3000);
 804         dtd->buff_ptr4 = cpu_to_hc32(swap_temp + 0x4000);
 805
 806         req->req.actual += *length;
 807
 808         /* zlp is needed if req->req.zero is set */
 809         if (req->req.zero) {
 810                 if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0)
 811                         *is_last = 1;
 812                 else
 813                         *is_last = 0;
 814         } else if (req->req.length == req->req.actual)
 815                 *is_last = 1;
 816         else
 817                 *is_last = 0;
 818
 819         if ((*is_last) == 0)
 820                 VDBG("multi-dtd request!");
 821         /* Fill in the transfer size; set active bit */
 822         swap_temp = ((*length << DTD_LENGTH_BIT_POS) | DTD_STATUS_ACTIVE);
 823
 824         /* Enable interrupt for the last dtd of a request */
 825         if (*is_last && !req->req.no_interrupt)
 826                 swap_temp |= DTD_IOC;
 827
 828         dtd->size_ioc_sts = cpu_to_hc32(swap_temp);
 829
 830         mb();
 831
 832         VDBG("length = %d address= 0x%x", *length, (int)*dma);
 833
 834         return dtd;
 835 }
 836
 837 /* Generate dtd chain for a request */
 838 static int fsl_req_to_dtd(struct fsl_req *req, gfp_t gfp_flags)
 839 {
 840         unsigned        count;
 841         int             is_last;
 842         int             is_first =1;
 843         struct ep_td_struct     *last_dtd = NULL, *dtd;
 844         dma_addr_t dma;
 845
 846         do {
 847                 dtd = fsl_build_dtd(req, &count, &dma, &is_last, gfp_flags);
 848                 if (dtd == NULL)
 849                         return -ENOMEM;
 850
 851                 if (is_first) {
 852                         is_first = 0;
 853                         req->head = dtd;
 854                 } else {
 855                         last_dtd->next_td_ptr = cpu_to_hc32(dma);
 856                         last_dtd->next_td_virt = dtd;
 857                 }
 858                 last_dtd = dtd;
 859
 860                 req->dtd_count++;
 861         } while (!is_last);
 862
 863         dtd->next_td_ptr = cpu_to_hc32(DTD_NEXT_TERMINATE);
 864
 865         req->tail = dtd;
 866
 867         return 0;
 868 }
 869
 870 /* queues (submits) an I/O request to an endpoint */
 871 static int
 872 fsl_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
 873 {
 874         struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
 875         struct fsl_req *req = container_of(_req, struct fsl_req, req);
 876         struct fsl_udc *udc;
 877         unsigned long flags;
 878         int ret;
 879
 880         /* catch various bogus parameters */
 881         if (!_req || !req->req.complete || !req->req.buf
 882                         || !list_empty(&req->queue)) {
 883                 VDBG("%s, bad params", __func__);
 884                 return -EINVAL;
 885         }
 886         if (unlikely(!_ep || !ep->ep.desc)) {
 887                 VDBG("%s, bad ep", __func__);
 888                 return -EINVAL;
 889         }
 890         if (usb_endpoint_xfer_isoc(ep->ep.desc)) {
 891                 if (req->req.length > ep->ep.maxpacket)
 892                         return -EMSGSIZE;
 893         }
 894
 895         udc = ep->udc;
 896         if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
 897                 return -ESHUTDOWN;
 898
 899         req->ep = ep;
 900
 901         ret = usb_gadget_map_request(&ep->udc->gadget, &req->req, ep_is_in(ep));
 902         if (ret)
 903                 return ret;
 904
 905         req->req.status = -EINPROGRESS;
 906         req->req.actual = 0;
 907         req->dtd_count = 0;
 908
 909         /* build dtds and push them to device queue */
 910         if (!fsl_req_to_dtd(req, gfp_flags)) {
 911                 spin_lock_irqsave(&udc->lock, flags);
 912                 fsl_queue_td(ep, req);
 913         } else {
 914                 return -ENOMEM;
 915         }
 916
 917         /* irq handler advances the queue */
 918         if (req != NULL)
 919                 list_add_tail(&req->queue, &ep->queue);
 920         spin_unlock_irqrestore(&udc->lock, flags);
 921
 922         return 0;
 923 }
 924
 925 /* dequeues (cancels, unlinks) an I/O request from an endpoint */
 926 static int fsl_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
 927 {
 928         struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
 929         struct fsl_req *req;
 930         unsigned long flags;
 931         int ep_num, stopped, ret = 0;
 932         u32 epctrl;
 933
 934         if (!_ep || !_req)
 935                 return -EINVAL;
 936
 937         spin_lock_irqsave(&ep->udc->lock, flags);
 938         stopped = ep->stopped;
 939
 940         /* Stop the ep before we deal with the queue */
 941         ep->stopped = 1;
 942         ep_num = ep_index(ep);
 943         epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 944         if (ep_is_in(ep))
 945                 epctrl &= ~EPCTRL_TX_ENABLE;
 946         else
 947                 epctrl &= ~EPCTRL_RX_ENABLE;
 948         fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
 949
 950         /* make sure it's actually queued on this endpoint */
 951         list_for_each_entry(req, &ep->queue, queue) {
 952                 if (&req->req == _req)
 953                         break;
 954         }
 955         if (&req->req != _req) {
 956                 ret = -EINVAL;
 957                 goto out;
 958         }
 959
 960         /* The request is in progress, or completed but not dequeued */
 961         if (ep->queue.next == &req->queue) {
 962                 _req->status = -ECONNRESET;
 963                 fsl_ep_fifo_flush(_ep); /* flush current transfer */
 964
 965                 /* The request isn't the last request in this ep queue */
 966                 if (req->queue.next != &ep->queue) {
 967                         struct fsl_req *next_req;
 968
 969                         next_req = list_entry(req->queue.next, struct fsl_req,
 970                                         queue);
 971
 972                         /* prime with dTD of next request */
 973                         fsl_prime_ep(ep, next_req->head);
 974                 }
 975         /* The request hasn't been processed, patch up the TD chain */
 976         } else {
 977                 struct fsl_req *prev_req;
 978
 979                 prev_req = list_entry(req->queue.prev, struct fsl_req, queue);
 980                 prev_req->tail->next_td_ptr = req->tail->next_td_ptr;
 981         }
 982
 983         done(ep, req, -ECONNRESET);
 984
 985         /* Enable EP */
 986 out:    epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 987         if (ep_is_in(ep))
 988                 epctrl |= EPCTRL_TX_ENABLE;
 989         else
 990                 epctrl |= EPCTRL_RX_ENABLE;
 991         fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
 992         ep->stopped = stopped;
 993
 994         spin_unlock_irqrestore(&ep->udc->lock, flags);
 995         return ret;
 996 }
 997
 998 /*-------------------------------------------------------------------------*/
 999
1000 /*-----------------------------------------------------------------
1001  * modify the endpoint halt feature
1002  * @ep: the non-isochronous endpoint being stalled
1003  * @value: 1--set halt  0--clear halt
1004  * Returns zero, or a negative error code.
1005 *----------------------------------------------------------------*/
1006 static int fsl_ep_set_halt(struct usb_ep *_ep, int value)
1007 {
1008         struct fsl_ep *ep = NULL;
1009         unsigned long flags = 0;
1010         int status = -EOPNOTSUPP;       /* operation not supported */
1011         unsigned char ep_dir = 0, ep_num = 0;
1012         struct fsl_udc *udc = NULL;
1013
1014         ep = container_of(_ep, struct fsl_ep, ep);
1015         udc = ep->udc;
1016         if (!_ep || !ep->ep.desc) {
1017                 status = -EINVAL;
1018                 goto out;
1019         }
1020
1021         if (usb_endpoint_xfer_isoc(ep->ep.desc)) {
1022                 status = -EOPNOTSUPP;
1023                 goto out;
1024         }
1025
1026         /* Attempt to halt IN ep will fail if any transfer requests
1027          * are still queue */
1028         if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
1029                 status = -EAGAIN;
1030                 goto out;
1031         }
1032
1033         status = 0;
1034         ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
1035         ep_num = (unsigned char)(ep_index(ep));
1036         spin_lock_irqsave(&ep->udc->lock, flags);
1037         dr_ep_change_stall(ep_num, ep_dir, value);
1038         spin_unlock_irqrestore(&ep->udc->lock, flags);
1039
1040         if (ep_index(ep) == 0) {
1041                 udc->ep0_state = WAIT_FOR_SETUP;
1042                 udc->ep0_dir = 0;
1043         }
1044 out:
1045         VDBG(" %s %s halt stat %d", ep->ep.name,
1046                         value ?  "set" : "clear", status);
1047
1048         return status;
1049 }
1050
1051 static int fsl_ep_fifo_status(struct usb_ep *_ep)
1052 {
1053         struct fsl_ep *ep;
1054         struct fsl_udc *udc;
1055         int size = 0;
1056         u32 bitmask;
1057         struct ep_queue_head *qh;
1058
1059         ep = container_of(_ep, struct fsl_ep, ep);
1060         if (!_ep || (!ep->ep.desc && ep_index(ep) != 0))
1061                 return -ENODEV;
1062
1063         udc = (struct fsl_udc *)ep->udc;
1064
1065         if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
1066                 return -ESHUTDOWN;
1067
1068         qh = get_qh_by_ep(ep);
1069
1070         bitmask = (ep_is_in(ep)) ? (1 << (ep_index(ep) + 16)) :
1071             (1 << (ep_index(ep)));
1072
1073         if (fsl_readl(&dr_regs->endptstatus) & bitmask)
1074                 size = (qh->size_ioc_int_sts & DTD_PACKET_SIZE)
1075                     >> DTD_LENGTH_BIT_POS;
1076
1077         pr_debug("%s %u\n", __func__, size);
1078         return size;
1079 }
1080
1081 static void fsl_ep_fifo_flush(struct usb_ep *_ep)
1082 {
1083         struct fsl_ep *ep;
1084         int ep_num, ep_dir;
1085         u32 bits;
1086         unsigned long timeout;
1087 #define FSL_UDC_FLUSH_TIMEOUT 1000
1088
1089         if (!_ep) {
1090                 return;
1091         } else {
1092                 ep = container_of(_ep, struct fsl_ep, ep);
1093                 if (!ep->ep.desc)
1094                         return;
1095         }
1096         ep_num = ep_index(ep);
1097         ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
1098
1099         if (ep_num == 0)
1100                 bits = (1 << 16) | 1;
1101         else if (ep_dir == USB_SEND)
1102                 bits = 1 << (16 + ep_num);
1103         else
1104                 bits = 1 << ep_num;
1105
1106         timeout = jiffies + FSL_UDC_FLUSH_TIMEOUT;
1107         do {
1108                 fsl_writel(bits, &dr_regs->endptflush);
1109
1110                 /* Wait until flush complete */
1111                 while (fsl_readl(&dr_regs->endptflush)) {
1112                         if (time_after(jiffies, timeout)) {
1113                                 ERR("ep flush timeout\n");
1114                                 return;
1115                         }
1116                         cpu_relax();
1117                 }
1118                 /* See if we need to flush again */
1119         } while (fsl_readl(&dr_regs->endptstatus) & bits);
1120 }
1121
1122 static struct usb_ep_ops fsl_ep_ops = {
1123         .enable = fsl_ep_enable,
1124         .disable = fsl_ep_disable,
1125
1126         .alloc_request = fsl_alloc_request,
1127         .free_request = fsl_free_request,
1128
1129         .queue = fsl_ep_queue,
1130         .dequeue = fsl_ep_dequeue,
1131
1132         .set_halt = fsl_ep_set_halt,
1133         .fifo_status = fsl_ep_fifo_status,
1134         .fifo_flush = fsl_ep_fifo_flush,        /* flush fifo */
1135 };
1136
1137 /*-------------------------------------------------------------------------
1138                 Gadget Driver Layer Operations
1139 -------------------------------------------------------------------------*/
1140
1141 /*----------------------------------------------------------------------
1142  * Get the current frame number (from DR frame_index Reg )
1143  *----------------------------------------------------------------------*/
1144 static int fsl_get_frame(struct usb_gadget *gadget)
1145 {
1146         return (int)(fsl_readl(&dr_regs->frindex) & USB_FRINDEX_MASKS);
1147 }
1148
1149 /*-----------------------------------------------------------------------
1150  * Tries to wake up the host connected to this gadget
1151  -----------------------------------------------------------------------*/
1152 static int fsl_wakeup(struct usb_gadget *gadget)
1153 {
1154         struct fsl_udc *udc = container_of(gadget, struct fsl_udc, gadget);
1155         u32 portsc;
1156
1157         /* Remote wakeup feature not enabled by host */
1158         if (!udc->remote_wakeup)
1159                 return -ENOTSUPP;
1160
1161         portsc = fsl_readl(&dr_regs->portsc1);
1162         /* not suspended? */
1163         if (!(portsc & PORTSCX_PORT_SUSPEND))
1164                 return 0;
1165         /* trigger force resume */
1166         portsc |= PORTSCX_PORT_FORCE_RESUME;
1167         fsl_writel(portsc, &dr_regs->portsc1);
1168         return 0;
1169 }
1170
1171 static int can_pullup(struct fsl_udc *udc)
1172 {
1173         return udc->driver && udc->softconnect && udc->vbus_active;
1174 }
1175
1176 /* Notify controller that VBUS is powered, Called by whatever
1177    detects VBUS sessions */
1178 static int fsl_vbus_session(struct usb_gadget *gadget, int is_active)
1179 {
1180         struct fsl_udc  *udc;
1181         unsigned long   flags;
1182
1183         udc = container_of(gadget, struct fsl_udc, gadget);
1184         spin_lock_irqsave(&udc->lock, flags);
1185         VDBG("VBUS %s", is_active ? "on" : "off");
1186         udc->vbus_active = (is_active != 0);
1187         if (can_pullup(udc))
1188                 fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
1189                                 &dr_regs->usbcmd);
1190         else
1191                 fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
1192                                 &dr_regs->usbcmd);
1193         spin_unlock_irqrestore(&udc->lock, flags);
1194         return 0;
1195 }
1196
1197 /* constrain controller's VBUS power usage
1198  * This call is used by gadget drivers during SET_CONFIGURATION calls,
1199  * reporting how much power the device may consume.  For example, this
1200  * could affect how quickly batteries are recharged.
1201  *
1202  * Returns zero on success, else negative errno.
1203  */
1204 static int fsl_vbus_draw(struct usb_gadget *gadget, unsigned mA)
1205 {
1206         struct fsl_udc *udc;
1207
1208         udc = container_of(gadget, struct fsl_udc, gadget);
1209         if (!IS_ERR_OR_NULL(udc->transceiver))
1210                 return usb_phy_set_power(udc->transceiver, mA);
1211         return -ENOTSUPP;
1212 }
1213
1214 /* Change Data+ pullup status
1215  * this func is used by usb_gadget_connect/disconnet
1216  */
1217 static int fsl_pullup(struct usb_gadget *gadget, int is_on)
1218 {
1219         struct fsl_udc *udc;
1220
1221         udc = container_of(gadget, struct fsl_udc, gadget);
1222         udc->softconnect = (is_on != 0);
1223         if (can_pullup(udc))
1224                 fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
1225                                 &dr_regs->usbcmd);
1226         else
1227                 fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
1228                                 &dr_regs->usbcmd);
1229
1230         return 0;
1231 }
1232
1233 static int fsl_udc_start(struct usb_gadget *g,
1234                 struct usb_gadget_driver *driver);
1235 static int fsl_udc_stop(struct usb_gadget *g,
1236                 struct usb_gadget_driver *driver);
1237 /* defined in gadget.h */
1238 static const struct usb_gadget_ops fsl_gadget_ops = {
1239         .get_frame = fsl_get_frame,
1240         .wakeup = fsl_wakeup,
1241 /*      .set_selfpowered = fsl_set_selfpowered, */ /* Always selfpowered */
1242         .vbus_session = fsl_vbus_session,
1243         .vbus_draw = fsl_vbus_draw,
1244         .pullup = fsl_pullup,
1245         .udc_start = fsl_udc_start,
1246         .udc_stop = fsl_udc_stop,
1247 };
1248
1249 /* Set protocol stall on ep0, protocol stall will automatically be cleared
1250    on new transaction */
1251 static void ep0stall(struct fsl_udc *udc)
1252 {
1253         u32 tmp;
1254
1255         /* must set tx and rx to stall at the same time */
1256         tmp = fsl_readl(&dr_regs->endptctrl[0]);
1257         tmp |= EPCTRL_TX_EP_STALL | EPCTRL_RX_EP_STALL;
1258         fsl_writel(tmp, &dr_regs->endptctrl[0]);
1259         udc->ep0_state = WAIT_FOR_SETUP;
1260         udc->ep0_dir = 0;
1261 }
1262
1263 /* Prime a status phase for ep0 */
1264 static int ep0_prime_status(struct fsl_udc *udc, int direction)
1265 {
1266         struct fsl_req *req = udc->status_req;
1267         struct fsl_ep *ep;
1268         int ret;
1269
1270         if (direction == EP_DIR_IN)
1271                 udc->ep0_dir = USB_DIR_IN;
1272         else
1273                 udc->ep0_dir = USB_DIR_OUT;
1274
1275         ep = &udc->eps[0];
1276         if (udc->ep0_state != DATA_STATE_XMIT)
1277                 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1278
1279         req->ep = ep;
1280         req->req.length = 0;
1281         req->req.status = -EINPROGRESS;
1282         req->req.actual = 0;
1283         req->req.complete = NULL;
1284         req->dtd_count = 0;
1285
1286         ret = usb_gadget_map_request(&ep->udc->gadget, &req->req, ep_is_in(ep));
1287         if (ret)
1288                 return ret;
1289
1290         if (fsl_req_to_dtd(req, GFP_ATOMIC) == 0)
1291                 fsl_queue_td(ep, req);
1292         else
1293                 return -ENOMEM;
1294
1295         list_add_tail(&req->queue, &ep->queue);
1296
1297         return 0;
1298 }
1299
1300 static void udc_reset_ep_queue(struct fsl_udc *udc, u8 pipe)
1301 {
1302         struct fsl_ep *ep = get_ep_by_pipe(udc, pipe);
1303
1304         if (ep->name)
1305                 nuke(ep, -ESHUTDOWN);
1306 }
1307
1308 /*
1309  * ch9 Set address
1310  */
1311 static void ch9setaddress(struct fsl_udc *udc, u16 value, u16 index, u16 length)
1312 {
1313         /* Save the new address to device struct */
1314         udc->device_address = (u8) value;
1315         /* Update usb state */
1316         udc->usb_state = USB_STATE_ADDRESS;
1317         /* Status phase */
1318         if (ep0_prime_status(udc, EP_DIR_IN))
1319                 ep0stall(udc);
1320 }
1321
1322 /*
1323  * ch9 Get status
1324  */
1325 static void ch9getstatus(struct fsl_udc *udc, u8 request_type, u16 value,
1326                 u16 index, u16 length)
1327 {
1328         u16 tmp = 0;            /* Status, cpu endian */
1329         struct fsl_req *req;
1330         struct fsl_ep *ep;
1331         int ret;
1332
1333         ep = &udc->eps[0];
1334
1335         if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1336                 /* Get device status */
1337                 tmp = 1 << USB_DEVICE_SELF_POWERED;
1338                 tmp |= udc->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP;
1339         } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
1340                 /* Get interface status */
1341                 /* We don't have interface information in udc driver */
1342                 tmp = 0;
1343         } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
1344                 /* Get endpoint status */
1345                 struct fsl_ep *target_ep;
1346
1347                 target_ep = get_ep_by_pipe(udc, get_pipe_by_windex(index));
1348
1349                 /* stall if endpoint doesn't exist */
1350                 if (!target_ep->ep.desc)
1351                         goto stall;
1352                 tmp = dr_ep_get_stall(ep_index(target_ep), ep_is_in(target_ep))
1353                                 << USB_ENDPOINT_HALT;
1354         }
1355
1356         udc->ep0_dir = USB_DIR_IN;
1357         /* Borrow the per device status_req */
1358         req = udc->status_req;
1359         /* Fill in the reqest structure */
1360         *((u16 *) req->req.buf) = cpu_to_le16(tmp);
1361
1362         req->ep = ep;
1363         req->req.length = 2;
1364         req->req.status = -EINPROGRESS;
1365         req->req.actual = 0;
1366         req->req.complete = NULL;
1367         req->dtd_count = 0;
1368
1369         ret = usb_gadget_map_request(&ep->udc->gadget, &req->req, ep_is_in(ep));
1370         if (ret)
1371                 goto stall;
1372
1373         /* prime the data phase */
1374         if ((fsl_req_to_dtd(req, GFP_ATOMIC) == 0))
1375                 fsl_queue_td(ep, req);
1376         else                    /* no mem */
1377                 goto stall;
1378
1379         list_add_tail(&req->queue, &ep->queue);
1380         udc->ep0_state = DATA_STATE_XMIT;
1381         if (ep0_prime_status(udc, EP_DIR_OUT))
1382                 ep0stall(udc);
1383
1384         return;
1385 stall:
1386         ep0stall(udc);
1387 }
1388
1389 static void setup_received_irq(struct fsl_udc *udc,
1390                 struct usb_ctrlrequest *setup)
1391 {
1392         u16 wValue = le16_to_cpu(setup->wValue);
1393         u16 wIndex = le16_to_cpu(setup->wIndex);
1394         u16 wLength = le16_to_cpu(setup->wLength);
1395
1396         udc_reset_ep_queue(udc, 0);
1397
1398         /* We process some stardard setup requests here */
1399         switch (setup->bRequest) {
1400         case USB_REQ_GET_STATUS:
1401                 /* Data+Status phase from udc */
1402                 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
1403                                         != (USB_DIR_IN | USB_TYPE_STANDARD))
1404                         break;
1405                 ch9getstatus(udc, setup->bRequestType, wValue, wIndex, wLength);
1406                 return;
1407
1408         case USB_REQ_SET_ADDRESS:
1409                 /* Status phase from udc */
1410                 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD
1411                                                 | USB_RECIP_DEVICE))
1412                         break;
1413                 ch9setaddress(udc, wValue, wIndex, wLength);
1414                 return;
1415
1416         case USB_REQ_CLEAR_FEATURE:
1417         case USB_REQ_SET_FEATURE:
1418                 /* Status phase from udc */
1419         {
1420                 int rc = -EOPNOTSUPP;
1421                 u16 ptc = 0;
1422
1423                 if ((setup->bRequestType & (USB_RECIP_MASK | USB_TYPE_MASK))
1424                                 == (USB_RECIP_ENDPOINT | USB_TYPE_STANDARD)) {
1425                         int pipe = get_pipe_by_windex(wIndex);
1426                         struct fsl_ep *ep;
1427
1428                         if (wValue != 0 || wLength != 0 || pipe >= udc->max_ep)
1429                                 break;
1430                         ep = get_ep_by_pipe(udc, pipe);
1431
1432                         spin_unlock(&udc->lock);
1433                         rc = fsl_ep_set_halt(&ep->ep,
1434                                         (setup->bRequest == USB_REQ_SET_FEATURE)
1435                                                 ? 1 : 0);
1436                         spin_lock(&udc->lock);
1437
1438                 } else if ((setup->bRequestType & (USB_RECIP_MASK
1439                                 | USB_TYPE_MASK)) == (USB_RECIP_DEVICE
1440                                 | USB_TYPE_STANDARD)) {
1441                         /* Note: The driver has not include OTG support yet.
1442                          * This will be set when OTG support is added */
1443                         if (wValue == USB_DEVICE_TEST_MODE)
1444                                 ptc = wIndex >> 8;
1445                         else if (gadget_is_otg(&udc->gadget)) {
1446                                 if (setup->bRequest ==
1447                                     USB_DEVICE_B_HNP_ENABLE)
1448                                         udc->gadget.b_hnp_enable = 1;
1449                                 else if (setup->bRequest ==
1450                                          USB_DEVICE_A_HNP_SUPPORT)
1451                                         udc->gadget.a_hnp_support = 1;
1452                                 else if (setup->bRequest ==
1453                                          USB_DEVICE_A_ALT_HNP_SUPPORT)
1454                                         udc->gadget.a_alt_hnp_support = 1;
1455                         }
1456                         rc = 0;
1457                 } else
1458                         break;
1459
1460                 if (rc == 0) {
1461                         if (ep0_prime_status(udc, EP_DIR_IN))
1462                                 ep0stall(udc);
1463                 }
1464                 if (ptc) {
1465                         u32 tmp;
1466
1467                         mdelay(10);
1468                         tmp = fsl_readl(&dr_regs->portsc1) | (ptc << 16);
1469                         fsl_writel(tmp, &dr_regs->portsc1);
1470                         printk(KERN_INFO "udc: switch to test mode %d.\n", ptc);
1471                 }
1472
1473                 return;
1474         }
1475
1476         default:
1477                 break;
1478         }
1479
1480         /* Requests handled by gadget */
1481         if (wLength) {
1482                 /* Data phase from gadget, status phase from udc */
1483                 udc->ep0_dir = (setup->bRequestType & USB_DIR_IN)
1484                                 ?  USB_DIR_IN : USB_DIR_OUT;
1485                 spin_unlock(&udc->lock);
1486                 if (udc->driver->setup(&udc->gadget,
1487                                 &udc->local_setup_buff) < 0)
1488                         ep0stall(udc);
1489                 spin_lock(&udc->lock);
1490                 udc->ep0_state = (setup->bRequestType & USB_DIR_IN)
1491                                 ?  DATA_STATE_XMIT : DATA_STATE_RECV;
1492                 /*
1493                  * If the data stage is IN, send status prime immediately.
1494                  * See 2.0 Spec chapter 8.5.3.3 for detail.
1495                  */
1496                 if (udc->ep0_state == DATA_STATE_XMIT)
1497                         if (ep0_prime_status(udc, EP_DIR_OUT))
1498                                 ep0stall(udc);
1499
1500         } else {
1501                 /* No data phase, IN status from gadget */
1502                 udc->ep0_dir = USB_DIR_IN;
1503                 spin_unlock(&udc->lock);
1504                 if (udc->driver->setup(&udc->gadget,
1505                                 &udc->local_setup_buff) < 0)
1506                         ep0stall(udc);
1507                 spin_lock(&udc->lock);
1508                 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1509         }
1510 }
1511
1512 /* Process request for Data or Status phase of ep0
1513  * prime status phase if needed */
1514 static void ep0_req_complete(struct fsl_udc *udc, struct fsl_ep *ep0,
1515                 struct fsl_req *req)
1516 {
1517         if (udc->usb_state == USB_STATE_ADDRESS) {
1518                 /* Set the new address */
1519                 u32 new_address = (u32) udc->device_address;
1520                 fsl_writel(new_address << USB_DEVICE_ADDRESS_BIT_POS,
1521                                 &dr_regs->deviceaddr);
1522         }
1523
1524         done(ep0, req, 0);
1525
1526         switch (udc->ep0_state) {
1527         case DATA_STATE_XMIT:
1528                 /* already primed at setup_received_irq */
1529                 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1530                 break;
1531         case DATA_STATE_RECV:
1532                 /* send status phase */
1533                 if (ep0_prime_status(udc, EP_DIR_IN))
1534                         ep0stall(udc);
1535                 break;
1536         case WAIT_FOR_OUT_STATUS:
1537                 udc->ep0_state = WAIT_FOR_SETUP;
1538                 break;
1539         case WAIT_FOR_SETUP:
1540                 ERR("Unexpect ep0 packets\n");
1541                 break;
1542         default:
1543                 ep0stall(udc);
1544                 break;
1545         }
1546 }
1547
1548 /* Tripwire mechanism to ensure a setup packet payload is extracted without
1549  * being corrupted by another incoming setup packet */
1550 static void tripwire_handler(struct fsl_udc *udc, u8 ep_num, u8 *buffer_ptr)
1551 {
1552         u32 temp;
1553         struct ep_queue_head *qh;
1554         struct fsl_usb2_platform_data *pdata = udc->pdata;
1555
1556         qh = &udc->ep_qh[ep_num * 2 + EP_DIR_OUT];
1557
1558         /* Clear bit in ENDPTSETUPSTAT */
1559         temp = fsl_readl(&dr_regs->endptsetupstat);
1560         fsl_writel(temp | (1 << ep_num), &dr_regs->endptsetupstat);
1561
1562         /* while a hazard exists when setup package arrives */
1563         do {
1564                 /* Set Setup Tripwire */
1565                 temp = fsl_readl(&dr_regs->usbcmd);
1566                 fsl_writel(temp | USB_CMD_SUTW, &dr_regs->usbcmd);
1567
1568                 /* Copy the setup packet to local buffer */
1569                 if (pdata->le_setup_buf) {
1570                         u32 *p = (u32 *)buffer_ptr;
1571                         u32 *s = (u32 *)qh->setup_buffer;
1572
1573                         /* Convert little endian setup buffer to CPU endian */
1574                         *p++ = le32_to_cpu(*s++);
1575                         *p = le32_to_cpu(*s);
1576                 } else {
1577                         memcpy(buffer_ptr, (u8 *) qh->setup_buffer, 8);
1578                 }
1579         } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_SUTW));
1580
1581         /* Clear Setup Tripwire */
1582         temp = fsl_readl(&dr_regs->usbcmd);
1583         fsl_writel(temp & ~USB_CMD_SUTW, &dr_regs->usbcmd);
1584 }
1585
1586 /* process-ep_req(): free the completed Tds for this req */
1587 static int process_ep_req(struct fsl_udc *udc, int pipe,
1588                 struct fsl_req *curr_req)
1589 {
1590         struct ep_td_struct *curr_td;
1591         int     td_complete, actual, remaining_length, j, tmp;
1592         int     status = 0;
1593         int     errors = 0;
1594         struct  ep_queue_head *curr_qh = &udc->ep_qh[pipe];
1595         int direction = pipe % 2;
1596
1597         curr_td = curr_req->head;
1598         td_complete = 0;
1599         actual = curr_req->req.length;
1600
1601         for (j = 0; j < curr_req->dtd_count; j++) {
1602                 remaining_length = (hc32_to_cpu(curr_td->size_ioc_sts)
1603                                         & DTD_PACKET_SIZE)
1604                                 >> DTD_LENGTH_BIT_POS;
1605                 actual -= remaining_length;
1606
1607                 errors = hc32_to_cpu(curr_td->size_ioc_sts);
1608                 if (errors & DTD_ERROR_MASK) {
1609                         if (errors & DTD_STATUS_HALTED) {
1610                                 ERR("dTD error %08x QH=%d\n", errors, pipe);
1611                                 /* Clear the errors and Halt condition */
1612                                 tmp = hc32_to_cpu(curr_qh->size_ioc_int_sts);
1613                                 tmp &= ~errors;
1614                                 curr_qh->size_ioc_int_sts = cpu_to_hc32(tmp);
1615                                 status = -EPIPE;
1616                                 /* FIXME: continue with next queued TD? */
1617
1618                                 break;
1619                         }
1620                         if (errors & DTD_STATUS_DATA_BUFF_ERR) {
1621                                 VDBG("Transfer overflow");
1622                                 status = -EPROTO;
1623                                 break;
1624                         } else if (errors & DTD_STATUS_TRANSACTION_ERR) {
1625                                 VDBG("ISO error");
1626                                 status = -EILSEQ;
1627                                 break;
1628                         } else
1629                                 ERR("Unknown error has occurred (0x%x)!\n",
1630                                         errors);
1631
1632                 } else if (hc32_to_cpu(curr_td->size_ioc_sts)
1633                                 & DTD_STATUS_ACTIVE) {
1634                         VDBG("Request not complete");
1635                         status = REQ_UNCOMPLETE;
1636                         return status;
1637                 } else if (remaining_length) {
1638                         if (direction) {
1639                                 VDBG("Transmit dTD remaining length not zero");
1640                                 status = -EPROTO;
1641                                 break;
1642                         } else {
1643                                 td_complete++;
1644                                 break;
1645                         }
1646                 } else {
1647                         td_complete++;
1648                         VDBG("dTD transmitted successful");
1649                 }
1650
1651                 if (j != curr_req->dtd_count - 1)
1652                         curr_td = (struct ep_td_struct *)curr_td->next_td_virt;
1653         }
1654
1655         if (status)
1656                 return status;
1657
1658         curr_req->req.actual = actual;
1659
1660         return 0;
1661 }
1662
1663 /* Process a DTD completion interrupt */
1664 static void dtd_complete_irq(struct fsl_udc *udc)
1665 {
1666         u32 bit_pos;
1667         int i, ep_num, direction, bit_mask, status;
1668         struct fsl_ep *curr_ep;
1669         struct fsl_req *curr_req, *temp_req;
1670
1671         /* Clear the bits in the register */
1672         bit_pos = fsl_readl(&dr_regs->endptcomplete);
1673         fsl_writel(bit_pos, &dr_regs->endptcomplete);
1674
1675         if (!bit_pos)
1676                 return;
1677
1678         for (i = 0; i < udc->max_ep; i++) {
1679                 ep_num = i >> 1;
1680                 direction = i % 2;
1681
1682                 bit_mask = 1 << (ep_num + 16 * direction);
1683
1684                 if (!(bit_pos & bit_mask))
1685                         continue;
1686
1687                 curr_ep = get_ep_by_pipe(udc, i);
1688
1689                 /* If the ep is configured */
1690                 if (curr_ep->name == NULL) {
1691                         WARNING("Invalid EP?");
1692                         continue;
1693                 }
1694
1695                 /* process the req queue until an uncomplete request */
1696                 list_for_each_entry_safe(curr_req, temp_req, &curr_ep->queue,
1697                                 queue) {
1698                         status = process_ep_req(udc, i, curr_req);
1699
1700                         VDBG("status of process_ep_req= %d, ep = %d",
1701                                         status, ep_num);
1702                         if (status == REQ_UNCOMPLETE)
1703                                 break;
1704                         /* write back status to req */
1705                         curr_req->req.status = status;
1706
1707                         if (ep_num == 0) {
1708                                 ep0_req_complete(udc, curr_ep, curr_req);
1709                                 break;
1710                         } else
1711                                 done(curr_ep, curr_req, status);
1712                 }
1713         }
1714 }
1715
1716 static inline enum usb_device_speed portscx_device_speed(u32 reg)
1717 {
1718         switch (reg & PORTSCX_PORT_SPEED_MASK) {
1719         case PORTSCX_PORT_SPEED_HIGH:
1720                 return USB_SPEED_HIGH;
1721         case PORTSCX_PORT_SPEED_FULL:
1722                 return USB_SPEED_FULL;
1723         case PORTSCX_PORT_SPEED_LOW:
1724                 return USB_SPEED_LOW;
1725         default:
1726                 return USB_SPEED_UNKNOWN;
1727         }
1728 }
1729
1730 /* Process a port change interrupt */
1731 static void port_change_irq(struct fsl_udc *udc)
1732 {
1733         if (udc->bus_reset)
1734                 udc->bus_reset = 0;
1735
1736         /* Bus resetting is finished */
1737         if (!(fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET))
1738                 /* Get the speed */
1739                 udc->gadget.speed =
1740                         portscx_device_speed(fsl_readl(&dr_regs->portsc1));
1741
1742         /* Update USB state */
1743         if (!udc->resume_state)
1744                 udc->usb_state = USB_STATE_DEFAULT;
1745 }
1746
1747 /* Process suspend interrupt */
1748 static void suspend_irq(struct fsl_udc *udc)
1749 {
1750         udc->resume_state = udc->usb_state;
1751         udc->usb_state = USB_STATE_SUSPENDED;
1752
1753         /* report suspend to the driver, serial.c does not support this */
1754         if (udc->driver->suspend)
1755                 udc->driver->suspend(&udc->gadget);
1756 }
1757
1758 static void bus_resume(struct fsl_udc *udc)
1759 {
1760         udc->usb_state = udc->resume_state;
1761         udc->resume_state = 0;
1762
1763         /* report resume to the driver, serial.c does not support this */
1764         if (udc->driver->resume)
1765                 udc->driver->resume(&udc->gadget);
1766 }
1767
1768 /* Clear up all ep queues */
1769 static int reset_queues(struct fsl_udc *udc)
1770 {
1771         u8 pipe;
1772
1773         for (pipe = 0; pipe < udc->max_pipes; pipe++)
1774                 udc_reset_ep_queue(udc, pipe);
1775
1776         /* report disconnect; the driver is already quiesced */
1777         spin_unlock(&udc->lock);
1778         udc->driver->disconnect(&udc->gadget);
1779         spin_lock(&udc->lock);
1780
1781         return 0;
1782 }
1783
1784 /* Process reset interrupt */
1785 static void reset_irq(struct fsl_udc *udc)
1786 {
1787         u32 temp;
1788         unsigned long timeout;
1789
1790         /* Clear the device address */
1791         temp = fsl_readl(&dr_regs->deviceaddr);
1792         fsl_writel(temp & ~USB_DEVICE_ADDRESS_MASK, &dr_regs->deviceaddr);
1793
1794         udc->device_address = 0;
1795
1796         /* Clear usb state */
1797         udc->resume_state = 0;
1798         udc->ep0_dir = 0;
1799         udc->ep0_state = WAIT_FOR_SETUP;
1800         udc->remote_wakeup = 0; /* default to 0 on reset */
1801         udc->gadget.b_hnp_enable = 0;
1802         udc->gadget.a_hnp_support = 0;
1803         udc->gadget.a_alt_hnp_support = 0;
1804
1805         /* Clear all the setup token semaphores */
1806         temp = fsl_readl(&dr_regs->endptsetupstat);
1807         fsl_writel(temp, &dr_regs->endptsetupstat);
1808
1809         /* Clear all the endpoint complete status bits */
1810         temp = fsl_readl(&dr_regs->endptcomplete);
1811         fsl_writel(temp, &dr_regs->endptcomplete);
1812
1813         timeout = jiffies + 100;
1814         while (fsl_readl(&dr_regs->endpointprime)) {
1815                 /* Wait until all endptprime bits cleared */
1816                 if (time_after(jiffies, timeout)) {
1817                         ERR("Timeout for reset\n");
1818                         break;
1819                 }
1820                 cpu_relax();
1821         }
1822
1823         /* Write 1s to the flush register */
1824         fsl_writel(0xffffffff, &dr_regs->endptflush);
1825
1826         if (fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET) {
1827                 VDBG("Bus reset");
1828                 /* Bus is reseting */
1829                 udc->bus_reset = 1;
1830                 /* Reset all the queues, include XD, dTD, EP queue
1831                  * head and TR Queue */
1832                 reset_queues(udc);
1833                 udc->usb_state = USB_STATE_DEFAULT;
1834         } else {
1835                 VDBG("Controller reset");
1836                 /* initialize usb hw reg except for regs for EP, not
1837                  * touch usbintr reg */
1838                 dr_controller_setup(udc);
1839
1840                 /* Reset all internal used Queues */
1841                 reset_queues(udc);
1842
1843                 ep0_setup(udc);
1844
1845                 /* Enable DR IRQ reg, Set Run bit, change udc state */
1846                 dr_controller_run(udc);
1847                 udc->usb_state = USB_STATE_ATTACHED;
1848         }
1849 }
1850
1851 /*
1852  * USB device controller interrupt handler
1853  */
1854 static irqreturn_t fsl_udc_irq(int irq, void *_udc)
1855 {
1856         struct fsl_udc *udc = _udc;
1857         u32 irq_src;
1858         irqreturn_t status = IRQ_NONE;
1859         unsigned long flags;
1860
1861         /* Disable ISR for OTG host mode */
1862         if (udc->stopped)
1863                 return IRQ_NONE;
1864         spin_lock_irqsave(&udc->lock, flags);
1865         irq_src = fsl_readl(&dr_regs->usbsts) & fsl_readl(&dr_regs->usbintr);
1866         /* Clear notification bits */
1867         fsl_writel(irq_src, &dr_regs->usbsts);
1868
1869         /* VDBG("irq_src [0x%8x]", irq_src); */
1870
1871         /* Need to resume? */
1872         if (udc->usb_state == USB_STATE_SUSPENDED)
1873                 if ((fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_SUSPEND) == 0)
1874                         bus_resume(udc);
1875
1876         /* USB Interrupt */
1877         if (irq_src & USB_STS_INT) {
1878                 VDBG("Packet int");
1879                 /* Setup package, we only support ep0 as control ep */
1880                 if (fsl_readl(&dr_regs->endptsetupstat) & EP_SETUP_STATUS_EP0) {
1881                         tripwire_handler(udc, 0,
1882                                         (u8 *) (&udc->local_setup_buff));
1883                         setup_received_irq(udc, &udc->local_setup_buff);
1884                         status = IRQ_HANDLED;
1885                 }
1886
1887                 /* completion of dtd */
1888                 if (fsl_readl(&dr_regs->endptcomplete)) {
1889                         dtd_complete_irq(udc);
1890                         status = IRQ_HANDLED;
1891                 }
1892         }
1893
1894         /* SOF (for ISO transfer) */
1895         if (irq_src & USB_STS_SOF) {
1896                 status = IRQ_HANDLED;
1897         }
1898
1899         /* Port Change */
1900         if (irq_src & USB_STS_PORT_CHANGE) {
1901                 port_change_irq(udc);
1902                 status = IRQ_HANDLED;
1903         }
1904
1905         /* Reset Received */
1906         if (irq_src & USB_STS_RESET) {
1907                 VDBG("reset int");
1908                 reset_irq(udc);
1909                 status = IRQ_HANDLED;
1910         }
1911
1912         /* Sleep Enable (Suspend) */
1913         if (irq_src & USB_STS_SUSPEND) {
1914                 suspend_irq(udc);
1915                 status = IRQ_HANDLED;
1916         }
1917
1918         if (irq_src & (USB_STS_ERR | USB_STS_SYS_ERR)) {
1919                 VDBG("Error IRQ %x", irq_src);
1920         }
1921
1922         spin_unlock_irqrestore(&udc->lock, flags);
1923         return status;
1924 }
1925
1926 /*----------------------------------------------------------------*
1927  * Hook to gadget drivers
1928  * Called by initialization code of gadget drivers
1929 *----------------------------------------------------------------*/
1930 static int fsl_udc_start(struct usb_gadget *g,
1931                 struct usb_gadget_driver *driver)
1932 {
1933         int retval = 0;
1934         unsigned long flags = 0;
1935
1936         /* lock is needed but whether should use this lock or another */
1937         spin_lock_irqsave(&udc_controller->lock, flags);
1938
1939         driver->driver.bus = NULL;
1940         /* hook up the driver */
1941         udc_controller->driver = driver;
1942         spin_unlock_irqrestore(&udc_controller->lock, flags);
1943
1944         if (!IS_ERR_OR_NULL(udc_controller->transceiver)) {
1945                 /* Suspend the controller until OTG enable it */
1946                 udc_controller->stopped = 1;
1947                 printk(KERN_INFO "Suspend udc for OTG auto detect\n");
1948
1949                 /* connect to bus through transceiver */
1950                 if (!IS_ERR_OR_NULL(udc_controller->transceiver)) {
1951                         retval = otg_set_peripheral(
1952                                         udc_controller->transceiver->otg,
1953                                                     &udc_controller->gadget);
1954                         if (retval < 0) {
1955                                 ERR("can't bind to transceiver\n");
1956                                 driver->unbind(&udc_controller->gadget);
1957                                 udc_controller->driver = 0;
1958                                 return retval;
1959                         }
1960                 }
1961         } else {
1962                 /* Enable DR IRQ reg and set USBCMD reg Run bit */
1963                 dr_controller_run(udc_controller);
1964                 udc_controller->usb_state = USB_STATE_ATTACHED;
1965                 udc_controller->ep0_state = WAIT_FOR_SETUP;
1966                 udc_controller->ep0_dir = 0;
1967         }
1968
1969         return retval;
1970 }
1971
1972 /* Disconnect from gadget driver */
1973 static int fsl_udc_stop(struct usb_gadget *g,
1974                 struct usb_gadget_driver *driver)
1975 {
1976         struct fsl_ep *loop_ep;
1977         unsigned long flags;
1978
1979         if (!IS_ERR_OR_NULL(udc_controller->transceiver))
1980                 otg_set_peripheral(udc_controller->transceiver->otg, NULL);
1981
1982         /* stop DR, disable intr */
1983         dr_controller_stop(udc_controller);
1984
1985         /* in fact, no needed */
1986         udc_controller->usb_state = USB_STATE_ATTACHED;
1987         udc_controller->ep0_state = WAIT_FOR_SETUP;
1988         udc_controller->ep0_dir = 0;
1989
1990         /* stand operation */
1991         spin_lock_irqsave(&udc_controller->lock, flags);
1992         udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
1993         nuke(&udc_controller->eps[0], -ESHUTDOWN);
1994         list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
1995                         ep.ep_list)
1996                 nuke(loop_ep, -ESHUTDOWN);
1997         spin_unlock_irqrestore(&udc_controller->lock, flags);
1998
1999         udc_controller->driver = NULL;
2000
2001         return 0;
2002 }
2003
2004 /*-------------------------------------------------------------------------
2005                 PROC File System Support
2006 -------------------------------------------------------------------------*/
2007 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
2008
2009 #include <linux/seq_file.h>
2010
2011 static const char proc_filename[] = "driver/fsl_usb2_udc";
2012
2013 static int fsl_proc_read(struct seq_file *m, void *v)
2014 {
2015         unsigned long flags;
2016         int i;
2017         u32 tmp_reg;
2018         struct fsl_ep *ep = NULL;
2019         struct fsl_req *req;
2020
2021         struct fsl_udc *udc = udc_controller;
2022
2023         spin_lock_irqsave(&udc->lock, flags);
2024
2025         /* ------basic driver information ---- */
2026         seq_printf(m,
2027                         DRIVER_DESC "\n"
2028                         "%s version: %s\n"
2029                         "Gadget driver: %s\n\n",
2030                         driver_name, DRIVER_VERSION,
2031                         udc->driver ? udc->driver->driver.name : "(none)");
2032
2033         /* ------ DR Registers ----- */
2034         tmp_reg = fsl_readl(&dr_regs->usbcmd);
2035         seq_printf(m,
2036                         "USBCMD reg:\n"
2037                         "SetupTW: %d\n"
2038                         "Run/Stop: %s\n\n",
2039                         (tmp_reg & USB_CMD_SUTW) ? 1 : 0,
2040                         (tmp_reg & USB_CMD_RUN_STOP) ? "Run" : "Stop");
2041
2042         tmp_reg = fsl_readl(&dr_regs->usbsts);
2043         seq_printf(m,
2044                         "USB Status Reg:\n"
2045                         "Dr Suspend: %d Reset Received: %d System Error: %s "
2046                         "USB Error Interrupt: %s\n\n",
2047                         (tmp_reg & USB_STS_SUSPEND) ? 1 : 0,
2048                         (tmp_reg & USB_STS_RESET) ? 1 : 0,
2049                         (tmp_reg & USB_STS_SYS_ERR) ? "Err" : "Normal",
2050                         (tmp_reg & USB_STS_ERR) ? "Err detected" : "No err");
2051
2052         tmp_reg = fsl_readl(&dr_regs->usbintr);
2053         seq_printf(m,
2054                         "USB Interrupt Enable Reg:\n"
2055                         "Sleep Enable: %d SOF Received Enable: %d "
2056                         "Reset Enable: %d\n"
2057                         "System Error Enable: %d "
2058                         "Port Change Dectected Enable: %d\n"
2059                         "USB Error Intr Enable: %d USB Intr Enable: %d\n\n",
2060                         (tmp_reg & USB_INTR_DEVICE_SUSPEND) ? 1 : 0,
2061                         (tmp_reg & USB_INTR_SOF_EN) ? 1 : 0,
2062                         (tmp_reg & USB_INTR_RESET_EN) ? 1 : 0,
2063                         (tmp_reg & USB_INTR_SYS_ERR_EN) ? 1 : 0,
2064                         (tmp_reg & USB_INTR_PTC_DETECT_EN) ? 1 : 0,
2065                         (tmp_reg & USB_INTR_ERR_INT_EN) ? 1 : 0,
2066                         (tmp_reg & USB_INTR_INT_EN) ? 1 : 0);
2067
2068         tmp_reg = fsl_readl(&dr_regs->frindex);
2069         seq_printf(m,
2070                         "USB Frame Index Reg: Frame Number is 0x%x\n\n",
2071                         (tmp_reg & USB_FRINDEX_MASKS));
2072
2073         tmp_reg = fsl_readl(&dr_regs->deviceaddr);
2074         seq_printf(m,
2075                         "USB Device Address Reg: Device Addr is 0x%x\n\n",
2076                         (tmp_reg & USB_DEVICE_ADDRESS_MASK));
2077
2078         tmp_reg = fsl_readl(&dr_regs->endpointlistaddr);
2079         seq_printf(m,
2080                         "USB Endpoint List Address Reg: "
2081                         "Device Addr is 0x%x\n\n",
2082                         (tmp_reg & USB_EP_LIST_ADDRESS_MASK));
2083
2084         tmp_reg = fsl_readl(&dr_regs->portsc1);
2085         seq_printf(m,
2086                 "USB Port Status&Control Reg:\n"
2087                 "Port Transceiver Type : %s Port Speed: %s\n"
2088                 "PHY Low Power Suspend: %s Port Reset: %s "
2089                 "Port Suspend Mode: %s\n"
2090                 "Over-current Change: %s "
2091                 "Port Enable/Disable Change: %s\n"
2092                 "Port Enabled/Disabled: %s "
2093                 "Current Connect Status: %s\n\n", ( {
2094                         const char *s;
2095                         switch (tmp_reg & PORTSCX_PTS_FSLS) {
2096                         case PORTSCX_PTS_UTMI:
2097                                 s = "UTMI"; break;
2098                         case PORTSCX_PTS_ULPI:
2099                                 s = "ULPI "; break;
2100                         case PORTSCX_PTS_FSLS:
2101                                 s = "FS/LS Serial"; break;
2102                         default:
2103                                 s = "None"; break;
2104                         }
2105                         s;} ),
2106                 usb_speed_string(portscx_device_speed(tmp_reg)),
2107                 (tmp_reg & PORTSCX_PHY_LOW_POWER_SPD) ?
2108                 "Normal PHY mode" : "Low power mode",
2109                 (tmp_reg & PORTSCX_PORT_RESET) ? "In Reset" :
2110                 "Not in Reset",
2111                 (tmp_reg & PORTSCX_PORT_SUSPEND) ? "In " : "Not in",
2112                 (tmp_reg & PORTSCX_OVER_CURRENT_CHG) ? "Dected" :
2113                 "No",
2114                 (tmp_reg & PORTSCX_PORT_EN_DIS_CHANGE) ? "Disable" :
2115                 "Not change",
2116                 (tmp_reg & PORTSCX_PORT_ENABLE) ? "Enable" :
2117                 "Not correct",
2118                 (tmp_reg & PORTSCX_CURRENT_CONNECT_STATUS) ?
2119                 "Attached" : "Not-Att");
2120
2121         tmp_reg = fsl_readl(&dr_regs->usbmode);
2122         seq_printf(m,
2123                         "USB Mode Reg: Controller Mode is: %s\n\n", ( {
2124                                 const char *s;
2125                                 switch (tmp_reg & USB_MODE_CTRL_MODE_HOST) {
2126                                 case USB_MODE_CTRL_MODE_IDLE:
2127                                         s = "Idle"; break;
2128                                 case USB_MODE_CTRL_MODE_DEVICE:
2129                                         s = "Device Controller"; break;
2130                                 case USB_MODE_CTRL_MODE_HOST:
2131                                         s = "Host Controller"; break;
2132                                 default:
2133                                         s = "None"; break;
2134                                 }
2135                                 s;
2136                         } ));
2137
2138         tmp_reg = fsl_readl(&dr_regs->endptsetupstat);
2139         seq_printf(m,
2140                         "Endpoint Setup Status Reg: SETUP on ep 0x%x\n\n",
2141                         (tmp_reg & EP_SETUP_STATUS_MASK));
2142
2143         for (i = 0; i < udc->max_ep / 2; i++) {
2144                 tmp_reg = fsl_readl(&dr_regs->endptctrl[i]);
2145                 seq_printf(m, "EP Ctrl Reg [0x%x]: = [0x%x]\n", i, tmp_reg);
2146         }
2147         tmp_reg = fsl_readl(&dr_regs->endpointprime);
2148         seq_printf(m, "EP Prime Reg = [0x%x]\n\n", tmp_reg);
2149
2150 #ifndef CONFIG_ARCH_MXC
2151         if (udc->pdata->have_sysif_regs) {
2152                 tmp_reg = usb_sys_regs->snoop1;
2153                 seq_printf(m, "Snoop1 Reg : = [0x%x]\n\n", tmp_reg);
2154
2155                 tmp_reg = usb_sys_regs->control;
2156                 seq_printf(m, "General Control Reg : = [0x%x]\n\n", tmp_reg);
2157         }
2158 #endif
2159
2160         /* ------fsl_udc, fsl_ep, fsl_request structure information ----- */
2161         ep = &udc->eps[0];
2162         seq_printf(m, "For %s Maxpkt is 0x%x index is 0x%x\n",
2163                         ep->ep.name, ep_maxpacket(ep), ep_index(ep));
2164
2165         if (list_empty(&ep->queue)) {
2166                 seq_puts(m, "its req queue is empty\n\n");
2167         } else {
2168                 list_for_each_entry(req, &ep->queue, queue) {
2169                         seq_printf(m,
2170                                 "req %p actual 0x%x length 0x%x buf %p\n",
2171                                 &req->req, req->req.actual,
2172                                 req->req.length, req->req.buf);
2173                 }
2174         }
2175         /* other gadget->eplist ep */
2176         list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
2177                 if (ep->ep.desc) {
2178                         seq_printf(m,
2179                                         "\nFor %s Maxpkt is 0x%x "
2180                                         "index is 0x%x\n",
2181                                         ep->ep.name, ep_maxpacket(ep),
2182                                         ep_index(ep));
2183
2184                         if (list_empty(&ep->queue)) {
2185                                 seq_puts(m, "its req queue is empty\n\n");
2186                         } else {
2187                                 list_for_each_entry(req, &ep->queue, queue) {
2188                                         seq_printf(m,
2189                                                 "req %p actual 0x%x length "
2190                                                 "0x%x  buf %p\n",
2191                                                 &req->req, req->req.actual,
2192                                                 req->req.length, req->req.buf);
2193                                 }       /* end for each_entry of ep req */
2194                         }       /* end for else */
2195                 }       /* end for if(ep->queue) */
2196         }       /* end (ep->desc) */
2197
2198         spin_unlock_irqrestore(&udc->lock, flags);
2199         return 0;
2200 }
2201
2202 /*
2203  * seq_file wrappers for procfile show routines.
2204  */
2205 static int fsl_proc_open(struct inode *inode, struct file *file)
2206 {
2207         return single_open(file, fsl_proc_read, NULL);
2208 }
2209
2210 static const struct file_operations fsl_proc_fops = {
2211         .open           = fsl_proc_open,
2212         .read           = seq_read,
2213         .llseek         = seq_lseek,
2214         .release        = single_release,
2215 };
2216
2217 #define create_proc_file()      proc_create(proc_filename, 0, NULL, &fsl_proc_fops)
2218 #define remove_proc_file()      remove_proc_entry(proc_filename, NULL)
2219
2220 #else                           /* !CONFIG_USB_GADGET_DEBUG_FILES */
2221
2222 #define create_proc_file()      do {} while (0)
2223 #define remove_proc_file()      do {} while (0)
2224
2225 #endif                          /* CONFIG_USB_GADGET_DEBUG_FILES */
2226
2227 /*-------------------------------------------------------------------------*/
2228
2229 /* Release udc structures */
2230 static void fsl_udc_release(struct device *dev)
2231 {
2232         complete(udc_controller->done);
2233         dma_free_coherent(dev->parent, udc_controller->ep_qh_size,
2234                         udc_controller->ep_qh, udc_controller->ep_qh_dma);
2235         kfree(udc_controller);
2236 }
2237
2238 /******************************************************************
2239         Internal structure setup functions
2240 *******************************************************************/
2241 /*------------------------------------------------------------------
2242  * init resource for globle controller
2243  * Return the udc handle on success or NULL on failure
2244  ------------------------------------------------------------------*/
2245 static int __init struct_udc_setup(struct fsl_udc *udc,
2246                 struct platform_device *pdev)
2247 {
2248         struct fsl_usb2_platform_data *pdata;
2249         size_t size;
2250
2251         pdata = dev_get_platdata(&pdev->dev);
2252         udc->phy_mode = pdata->phy_mode;
2253
2254         udc->eps = kzalloc(sizeof(struct fsl_ep) * udc->max_ep, GFP_KERNEL);
2255         if (!udc->eps) {
2256                 ERR("malloc fsl_ep failed\n");
2257                 return -1;
2258         }
2259
2260         /* initialized QHs, take care of alignment */
2261         size = udc->max_ep * sizeof(struct ep_queue_head);
2262         if (size < QH_ALIGNMENT)
2263                 size = QH_ALIGNMENT;
2264         else if ((size % QH_ALIGNMENT) != 0) {
2265                 size += QH_ALIGNMENT + 1;
2266                 size &= ~(QH_ALIGNMENT - 1);
2267         }
2268         udc->ep_qh = dma_alloc_coherent(&pdev->dev, size,
2269                                         &udc->ep_qh_dma, GFP_KERNEL);
2270         if (!udc->ep_qh) {
2271                 ERR("malloc QHs for udc failed\n");
2272                 kfree(udc->eps);
2273                 return -1;
2274         }
2275
2276         udc->ep_qh_size = size;
2277
2278         /* Initialize ep0 status request structure */
2279         /* FIXME: fsl_alloc_request() ignores ep argument */
2280         udc->status_req = container_of(fsl_alloc_request(NULL, GFP_KERNEL),
2281                         struct fsl_req, req);
2282         /* allocate a small amount of memory to get valid address */
2283         udc->status_req->req.buf = kmalloc(8, GFP_KERNEL);
2284
2285         udc->resume_state = USB_STATE_NOTATTACHED;
2286         udc->usb_state = USB_STATE_POWERED;
2287         udc->ep0_dir = 0;
2288         udc->remote_wakeup = 0; /* default to 0 on reset */
2289
2290         return 0;
2291 }
2292
2293 /*----------------------------------------------------------------
2294  * Setup the fsl_ep struct for eps
2295  * Link fsl_ep->ep to gadget->ep_list
2296  * ep0out is not used so do nothing here
2297  * ep0in should be taken care
2298  *--------------------------------------------------------------*/
2299 static int __init struct_ep_setup(struct fsl_udc *udc, unsigned char index,
2300                 char *name, int link)
2301 {
2302         struct fsl_ep *ep = &udc->eps[index];
2303
2304         ep->udc = udc;
2305         strcpy(ep->name, name);
2306         ep->ep.name = ep->name;
2307
2308         ep->ep.ops = &fsl_ep_ops;
2309         ep->stopped = 0;
2310
2311         /* for ep0: maxP defined in desc
2312          * for other eps, maxP is set by epautoconfig() called by gadget layer
2313          */
2314         usb_ep_set_maxpacket_limit(&ep->ep, (unsigned short) ~0);
2315
2316         /* the queue lists any req for this ep */
2317         INIT_LIST_HEAD(&ep->queue);
2318
2319         /* gagdet.ep_list used for ep_autoconfig so no ep0 */
2320         if (link)
2321                 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2322         ep->gadget = &udc->gadget;
2323         ep->qh = &udc->ep_qh[index];
2324
2325         return 0;
2326 }
2327
2328 /* Driver probe function
2329  * all intialization operations implemented here except enabling usb_intr reg
2330  * board setup should have been done in the platform code
2331  */
2332 static int __init fsl_udc_probe(struct platform_device *pdev)
2333 {
2334         struct fsl_usb2_platform_data *pdata;
2335         struct resource *res;
2336         int ret = -ENODEV;
2337         unsigned int i;
2338         u32 dccparams;
2339
2340         udc_controller = kzalloc(sizeof(struct fsl_udc), GFP_KERNEL);
2341         if (udc_controller == NULL) {
2342                 ERR("malloc udc failed\n");
2343                 return -ENOMEM;
2344         }
2345
2346         pdata = dev_get_platdata(&pdev->dev);
2347         udc_controller->pdata = pdata;
2348         spin_lock_init(&udc_controller->lock);
2349         udc_controller->stopped = 1;
2350
2351 #ifdef CONFIG_USB_OTG
2352         if (pdata->operating_mode == FSL_USB2_DR_OTG) {
2353                 udc_controller->transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
2354                 if (IS_ERR_OR_NULL(udc_controller->transceiver)) {
2355                         ERR("Can't find OTG driver!\n");
2356                         ret = -ENODEV;
2357                         goto err_kfree;
2358                 }
2359         }
2360 #endif
2361
2362         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2363         if (!res) {
2364                 ret = -ENXIO;
2365                 goto err_kfree;
2366         }
2367
2368         if (pdata->operating_mode == FSL_USB2_DR_DEVICE) {
2369                 if (!request_mem_region(res->start, resource_size(res),
2370                                         driver_name)) {
2371                         ERR("request mem region for %s failed\n", pdev->name);
2372                         ret = -EBUSY;
2373                         goto err_kfree;
2374                 }
2375         }
2376
2377         dr_regs = ioremap(res->start, resource_size(res));
2378         if (!dr_regs) {
2379                 ret = -ENOMEM;
2380                 goto err_release_mem_region;
2381         }
2382
2383         pdata->regs = (void *)dr_regs;
2384
2385         /*
2386          * do platform specific init: check the clock, grab/config pins, etc.
2387          */
2388         if (pdata->init && pdata->init(pdev)) {
2389                 ret = -ENODEV;
2390                 goto err_iounmap_noclk;
2391         }
2392
2393         /* Set accessors only after pdata->init() ! */
2394         fsl_set_accessors(pdata);
2395
2396 #ifndef CONFIG_ARCH_MXC
2397         if (pdata->have_sysif_regs)
2398                 usb_sys_regs = (void *)dr_regs + USB_DR_SYS_OFFSET;
2399 #endif
2400
2401         /* Initialize USB clocks */
2402         ret = fsl_udc_clk_init(pdev);
2403         if (ret < 0)
2404                 goto err_iounmap_noclk;
2405
2406         /* Read Device Controller Capability Parameters register */
2407         dccparams = fsl_readl(&dr_regs->dccparams);
2408         if (!(dccparams & DCCPARAMS_DC)) {
2409                 ERR("This SOC doesn't support device role\n");
2410                 ret = -ENODEV;
2411                 goto err_iounmap;
2412         }
2413         /* Get max device endpoints */
2414         /* DEN is bidirectional ep number, max_ep doubles the number */
2415         udc_controller->max_ep = (dccparams & DCCPARAMS_DEN_MASK) * 2;
2416
2417         udc_controller->irq = platform_get_irq(pdev, 0);
2418         if (!udc_controller->irq) {
2419                 ret = -ENODEV;
2420                 goto err_iounmap;
2421         }
2422
2423         ret = request_irq(udc_controller->irq, fsl_udc_irq, IRQF_SHARED,
2424                         driver_name, udc_controller);
2425         if (ret != 0) {
2426                 ERR("cannot request irq %d err %d\n",
2427                                 udc_controller->irq, ret);
2428                 goto err_iounmap;
2429         }
2430
2431         /* Initialize the udc structure including QH member and other member */
2432         if (struct_udc_setup(udc_controller, pdev)) {
2433                 ERR("Can't initialize udc data structure\n");
2434                 ret = -ENOMEM;
2435                 goto err_free_irq;
2436         }
2437
2438         if (IS_ERR_OR_NULL(udc_controller->transceiver)) {
2439                 /* initialize usb hw reg except for regs for EP,
2440                  * leave usbintr reg untouched */
2441                 dr_controller_setup(udc_controller);
2442         }
2443
2444         ret = fsl_udc_clk_finalize(pdev);
2445         if (ret)
2446                 goto err_free_irq;
2447
2448         /* Setup gadget structure */
2449         udc_controller->gadget.ops = &fsl_gadget_ops;
2450         udc_controller->gadget.max_speed = USB_SPEED_HIGH;
2451         udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
2452         INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
2453         udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2454         udc_controller->gadget.name = driver_name;
2455
2456         /* Setup gadget.dev and register with kernel */
2457         dev_set_name(&udc_controller->gadget.dev, "gadget");
2458         udc_controller->gadget.dev.of_node = pdev->dev.of_node;
2459
2460         if (!IS_ERR_OR_NULL(udc_controller->transceiver))
2461                 udc_controller->gadget.is_otg = 1;
2462
2463         /* setup QH and epctrl for ep0 */
2464         ep0_setup(udc_controller);
2465
2466         /* setup udc->eps[] for ep0 */
2467         struct_ep_setup(udc_controller, 0, "ep0", 0);
2468         /* for ep0: the desc defined here;
2469          * for other eps, gadget layer called ep_enable with defined desc
2470          */
2471         udc_controller->eps[0].ep.desc = &fsl_ep0_desc;
2472         usb_ep_set_maxpacket_limit(&udc_controller->eps[0].ep,
2473                                    USB_MAX_CTRL_PAYLOAD);
2474
2475         /* setup the udc->eps[] for non-control endpoints and link
2476          * to gadget.ep_list */
2477         for (i = 1; i < (int)(udc_controller->max_ep / 2); i++) {
2478                 char name[14];
2479
2480                 sprintf(name, "ep%dout", i);
2481                 struct_ep_setup(udc_controller, i * 2, name, 1);
2482                 sprintf(name, "ep%din", i);
2483                 struct_ep_setup(udc_controller, i * 2 + 1, name, 1);
2484         }
2485
2486         /* use dma_pool for TD management */
2487         udc_controller->td_pool = dma_pool_create("udc_td", &pdev->dev,
2488                         sizeof(struct ep_td_struct),
2489                         DTD_ALIGNMENT, UDC_DMA_BOUNDARY);
2490         if (udc_controller->td_pool == NULL) {
2491                 ret = -ENOMEM;
2492                 goto err_free_irq;
2493         }
2494
2495         ret = usb_add_gadget_udc_release(&pdev->dev, &udc_controller->gadget,
2496                         fsl_udc_release);
2497         if (ret)
2498                 goto err_del_udc;
2499
2500         create_proc_file();
2501         return 0;
2502
2503 err_del_udc:
2504         dma_pool_destroy(udc_controller->td_pool);
2505 err_free_irq:
2506         free_irq(udc_controller->irq, udc_controller);
2507 err_iounmap:
2508         if (pdata->exit)
2509                 pdata->exit(pdev);
2510         fsl_udc_clk_release();
2511 err_iounmap_noclk:
2512         iounmap(dr_regs);
2513 err_release_mem_region:
2514         if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
2515                 release_mem_region(res->start, resource_size(res));
2516 err_kfree:
2517         kfree(udc_controller);
2518         udc_controller = NULL;
2519         return ret;
2520 }
2521
2522 /* Driver removal function
2523  * Free resources and finish pending transactions
2524  */
2525 static int __exit fsl_udc_remove(struct platform_device *pdev)
2526 {
2527         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2528         struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
2529
2530         DECLARE_COMPLETION(done);
2531
2532         if (!udc_controller)
2533                 return -ENODEV;
2534
2535         usb_del_gadget_udc(&udc_controller->gadget);
2536         udc_controller->done = &done;
2537
2538         fsl_udc_clk_release();
2539
2540         /* DR has been stopped in usb_gadget_unregister_driver() */
2541         remove_proc_file();
2542
2543         /* Free allocated memory */
2544         kfree(udc_controller->status_req->req.buf);
2545         kfree(udc_controller->status_req);
2546         kfree(udc_controller->eps);
2547
2548         dma_pool_destroy(udc_controller->td_pool);
2549         free_irq(udc_controller->irq, udc_controller);
2550         iounmap(dr_regs);
2551         if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
2552                 release_mem_region(res->start, resource_size(res));
2553
2554         /* free udc --wait for the release() finished */
2555         wait_for_completion(&done);
2556
2557         /*
2558          * do platform specific un-initialization:
2559          * release iomux pins, etc.
2560          */
2561         if (pdata->exit)
2562                 pdata->exit(pdev);
2563
2564         return 0;
2565 }
2566
2567 /*-----------------------------------------------------------------
2568  * Modify Power management attributes
2569  * Used by OTG statemachine to disable gadget temporarily
2570  -----------------------------------------------------------------*/
2571 static int fsl_udc_suspend(struct platform_device *pdev, pm_message_t state)
2572 {
2573         dr_controller_stop(udc_controller);
2574         return 0;
2575 }
2576
2577 /*-----------------------------------------------------------------
2578  * Invoked on USB resume. May be called in_interrupt.
2579  * Here we start the DR controller and enable the irq
2580  *-----------------------------------------------------------------*/
2581 static int fsl_udc_resume(struct platform_device *pdev)
2582 {
2583         /* Enable DR irq reg and set controller Run */
2584         if (udc_controller->stopped) {
2585                 dr_controller_setup(udc_controller);
2586                 dr_controller_run(udc_controller);
2587         }
2588         udc_controller->usb_state = USB_STATE_ATTACHED;
2589         udc_controller->ep0_state = WAIT_FOR_SETUP;
2590         udc_controller->ep0_dir = 0;
2591         return 0;
2592 }
2593
2594 static int fsl_udc_otg_suspend(struct device *dev, pm_message_t state)
2595 {
2596         struct fsl_udc *udc = udc_controller;
2597         u32 mode, usbcmd;
2598
2599         mode = fsl_readl(&dr_regs->usbmode) & USB_MODE_CTRL_MODE_MASK;
2600
2601         pr_debug("%s(): mode 0x%x stopped %d\n", __func__, mode, udc->stopped);
2602
2603         /*
2604          * If the controller is already stopped, then this must be a
2605          * PM suspend.  Remember this fact, so that we will leave the
2606          * controller stopped at PM resume time.
2607          */
2608         if (udc->stopped) {
2609                 pr_debug("gadget already stopped, leaving early\n");
2610                 udc->already_stopped = 1;
2611                 return 0;
2612         }
2613
2614         if (mode != USB_MODE_CTRL_MODE_DEVICE) {
2615                 pr_debug("gadget not in device mode, leaving early\n");
2616                 return 0;
2617         }
2618
2619         /* stop the controller */
2620         usbcmd = fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP;
2621         fsl_writel(usbcmd, &dr_regs->usbcmd);
2622
2623         udc->stopped = 1;
2624
2625         pr_info("USB Gadget suspended\n");
2626
2627         return 0;
2628 }
2629
2630 static int fsl_udc_otg_resume(struct device *dev)
2631 {
2632         pr_debug("%s(): stopped %d  already_stopped %d\n", __func__,
2633                  udc_controller->stopped, udc_controller->already_stopped);
2634
2635         /*
2636          * If the controller was stopped at suspend time, then
2637          * don't resume it now.
2638          */
2639         if (udc_controller->already_stopped) {
2640                 udc_controller->already_stopped = 0;
2641                 pr_debug("gadget was already stopped, leaving early\n");
2642                 return 0;
2643         }
2644
2645         pr_info("USB Gadget resume\n");
2646
2647         return fsl_udc_resume(NULL);
2648 }
2649 /*-------------------------------------------------------------------------
2650         Register entry point for the peripheral controller driver
2651 --------------------------------------------------------------------------*/
2652 static const struct platform_device_id fsl_udc_devtype[] = {
2653         {
2654                 .name = "imx-udc-mx27",
2655         }, {
2656                 .name = "imx-udc-mx51",
2657         }, {
2658                 /* sentinel */
2659         }
2660 };
2661 MODULE_DEVICE_TABLE(platform, fsl_udc_devtype);
2662 static struct platform_driver udc_driver = {
2663         .remove         = __exit_p(fsl_udc_remove),
2664         /* Just for FSL i.mx SoC currently */
2665         .id_table       = fsl_udc_devtype,
2666         /* these suspend and resume are not usb suspend and resume */
2667         .suspend        = fsl_udc_suspend,
2668         .resume         = fsl_udc_resume,
2669         .driver         = {
2670                         .name = driver_name,
2671                         .owner = THIS_MODULE,
2672                         /* udc suspend/resume called from OTG driver */
2673                         .suspend = fsl_udc_otg_suspend,
2674                         .resume  = fsl_udc_otg_resume,
2675         },
2676 };
2677
2678 module_platform_driver_probe(udc_driver, fsl_udc_probe);
2679
2680 MODULE_DESCRIPTION(DRIVER_DESC);
2681 MODULE_AUTHOR(DRIVER_AUTHOR);
2682 MODULE_LICENSE("GPL");
2683 MODULE_ALIAS("platform:fsl-usb2-udc");