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         if (req->mapped) {
 189                 dma_unmap_single(ep->udc->gadget.dev.parent,
 190                         req->req.dma, req->req.length,
 191                         ep_is_in(ep)
 192                                 ? DMA_TO_DEVICE
 193                                 : DMA_FROM_DEVICE);
 194                 req->req.dma = DMA_ADDR_INVALID;
 195                 req->mapped = 0;
 196         } else
 197                 dma_sync_single_for_cpu(ep->udc->gadget.dev.parent,
 198                         req->req.dma, req->req.length,
 199                         ep_is_in(ep)
 200                                 ? DMA_TO_DEVICE
 201                                 : DMA_FROM_DEVICE);
 202
 203         if (status && (status != -ESHUTDOWN))
 204                 VDBG("complete %s req %p stat %d len %u/%u",
 205                         ep->ep.name, &req->req, status,
 206                         req->req.actual, req->req.length);
 207
 208         ep->stopped = 1;
 209
 210         spin_unlock(&ep->udc->lock);
 211         /* complete() is from gadget layer,
 212          * eg fsg->bulk_in_complete() */
 213         if (req->req.complete)
 214                 req->req.complete(&ep->ep, &req->req);
 215
 216         spin_lock(&ep->udc->lock);
 217         ep->stopped = stopped;
 218 }
 219
 220 /*-----------------------------------------------------------------
 221  * nuke(): delete all requests related to this ep
 222  * called with spinlock held
 223  *--------------------------------------------------------------*/
 224 static void nuke(struct fsl_ep *ep, int status)
 225 {
 226         ep->stopped = 1;
 227
 228         /* Flush fifo */
 229         fsl_ep_fifo_flush(&ep->ep);
 230
 231         /* Whether this eq has request linked */
 232         while (!list_empty(&ep->queue)) {
 233                 struct fsl_req *req = NULL;
 234
 235                 req = list_entry(ep->queue.next, struct fsl_req, queue);
 236                 done(ep, req, status);
 237         }
 238 }
 239
 240 /*------------------------------------------------------------------
 241         Internal Hardware related function
 242  ------------------------------------------------------------------*/
 243
 244 static int dr_controller_setup(struct fsl_udc *udc)
 245 {
 246         unsigned int tmp, portctrl, ep_num;
 247         unsigned int max_no_of_ep;
 248         unsigned int ctrl;
 249         unsigned long timeout;
 250
 251 #define FSL_UDC_RESET_TIMEOUT 1000
 252
 253         /* Config PHY interface */
 254         portctrl = fsl_readl(&dr_regs->portsc1);
 255         portctrl &= ~(PORTSCX_PHY_TYPE_SEL | PORTSCX_PORT_WIDTH);
 256         switch (udc->phy_mode) {
 257         case FSL_USB2_PHY_ULPI:
 258                 if (udc->pdata->have_sysif_regs) {
 259                         if (udc->pdata->controller_ver) {
 260                                 /* controller version 1.6 or above */
 261                                 ctrl = __raw_readl(&usb_sys_regs->control);
 262                                 ctrl &= ~USB_CTRL_UTMI_PHY_EN;
 263                                 ctrl |= USB_CTRL_USB_EN;
 264                                 __raw_writel(ctrl, &usb_sys_regs->control);
 265                         }
 266                 }
 267                 portctrl |= PORTSCX_PTS_ULPI;
 268                 break;
 269         case FSL_USB2_PHY_UTMI_WIDE:
 270                 portctrl |= PORTSCX_PTW_16BIT;
 271                 /* fall through */
 272         case FSL_USB2_PHY_UTMI:
 273                 if (udc->pdata->have_sysif_regs) {
 274                         if (udc->pdata->controller_ver) {
 275                                 /* controller version 1.6 or above */
 276                                 ctrl = __raw_readl(&usb_sys_regs->control);
 277                                 ctrl |= (USB_CTRL_UTMI_PHY_EN |
 278                                         USB_CTRL_USB_EN);
 279                                 __raw_writel(ctrl, &usb_sys_regs->control);
 280                                 mdelay(FSL_UTMI_PHY_DLY); /* Delay for UTMI
 281                                         PHY CLK to become stable - 10ms*/
 282                         }
 283                 }
 284                 portctrl |= PORTSCX_PTS_UTMI;
 285                 break;
 286         case FSL_USB2_PHY_SERIAL:
 287                 portctrl |= PORTSCX_PTS_FSLS;
 288                 break;
 289         default:
 290                 return -EINVAL;
 291         }
 292         fsl_writel(portctrl, &dr_regs->portsc1);
 293
 294         /* Stop and reset the usb controller */
 295         tmp = fsl_readl(&dr_regs->usbcmd);
 296         tmp &= ~USB_CMD_RUN_STOP;
 297         fsl_writel(tmp, &dr_regs->usbcmd);
 298
 299         tmp = fsl_readl(&dr_regs->usbcmd);
 300         tmp |= USB_CMD_CTRL_RESET;
 301         fsl_writel(tmp, &dr_regs->usbcmd);
 302
 303         /* Wait for reset to complete */
 304         timeout = jiffies + FSL_UDC_RESET_TIMEOUT;
 305         while (fsl_readl(&dr_regs->usbcmd) & USB_CMD_CTRL_RESET) {
 306                 if (time_after(jiffies, timeout)) {
 307                         ERR("udc reset timeout!\n");
 308                         return -ETIMEDOUT;
 309                 }
 310                 cpu_relax();
 311         }
 312
 313         /* Set the controller as device mode */
 314         tmp = fsl_readl(&dr_regs->usbmode);
 315         tmp &= ~USB_MODE_CTRL_MODE_MASK;        /* clear mode bits */
 316         tmp |= USB_MODE_CTRL_MODE_DEVICE;
 317         /* Disable Setup Lockout */
 318         tmp |= USB_MODE_SETUP_LOCK_OFF;
 319         if (udc->pdata->es)
 320                 tmp |= USB_MODE_ES;
 321         fsl_writel(tmp, &dr_regs->usbmode);
 322
 323         /* Clear the setup status */
 324         fsl_writel(0, &dr_regs->usbsts);
 325
 326         tmp = udc->ep_qh_dma;
 327         tmp &= USB_EP_LIST_ADDRESS_MASK;
 328         fsl_writel(tmp, &dr_regs->endpointlistaddr);
 329
 330         VDBG("vir[qh_base] is %p phy[qh_base] is 0x%8x reg is 0x%8x",
 331                 udc->ep_qh, (int)tmp,
 332                 fsl_readl(&dr_regs->endpointlistaddr));
 333
 334         max_no_of_ep = (0x0000001F & fsl_readl(&dr_regs->dccparams));
 335         for (ep_num = 1; ep_num < max_no_of_ep; ep_num++) {
 336                 tmp = fsl_readl(&dr_regs->endptctrl[ep_num]);
 337                 tmp &= ~(EPCTRL_TX_TYPE | EPCTRL_RX_TYPE);
 338                 tmp |= (EPCTRL_EP_TYPE_BULK << EPCTRL_TX_EP_TYPE_SHIFT)
 339                 | (EPCTRL_EP_TYPE_BULK << EPCTRL_RX_EP_TYPE_SHIFT);
 340                 fsl_writel(tmp, &dr_regs->endptctrl[ep_num]);
 341         }
 342         /* Config control enable i/o output, cpu endian register */
 343 #ifndef CONFIG_ARCH_MXC
 344         if (udc->pdata->have_sysif_regs) {
 345                 ctrl = __raw_readl(&usb_sys_regs->control);
 346                 ctrl |= USB_CTRL_IOENB;
 347                 __raw_writel(ctrl, &usb_sys_regs->control);
 348         }
 349 #endif
 350
 351 #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE)
 352         /* Turn on cache snooping hardware, since some PowerPC platforms
 353          * wholly rely on hardware to deal with cache coherent. */
 354
 355         if (udc->pdata->have_sysif_regs) {
 356                 /* Setup Snooping for all the 4GB space */
 357                 tmp = SNOOP_SIZE_2GB;   /* starts from 0x0, size 2G */
 358                 __raw_writel(tmp, &usb_sys_regs->snoop1);
 359                 tmp |= 0x80000000;      /* starts from 0x8000000, size 2G */
 360                 __raw_writel(tmp, &usb_sys_regs->snoop2);
 361         }
 362 #endif
 363
 364         return 0;
 365 }
 366
 367 /* Enable DR irq and set controller to run state */
 368 static void dr_controller_run(struct fsl_udc *udc)
 369 {
 370         u32 temp;
 371
 372         /* Enable DR irq reg */
 373         temp = USB_INTR_INT_EN | USB_INTR_ERR_INT_EN
 374                 | USB_INTR_PTC_DETECT_EN | USB_INTR_RESET_EN
 375                 | USB_INTR_DEVICE_SUSPEND | USB_INTR_SYS_ERR_EN;
 376
 377         fsl_writel(temp, &dr_regs->usbintr);
 378
 379         /* Clear stopped bit */
 380         udc->stopped = 0;
 381
 382         /* Set the controller as device mode */
 383         temp = fsl_readl(&dr_regs->usbmode);
 384         temp |= USB_MODE_CTRL_MODE_DEVICE;
 385         fsl_writel(temp, &dr_regs->usbmode);
 386
 387         /* Set controller to Run */
 388         temp = fsl_readl(&dr_regs->usbcmd);
 389         temp |= USB_CMD_RUN_STOP;
 390         fsl_writel(temp, &dr_regs->usbcmd);
 391 }
 392
 393 static void dr_controller_stop(struct fsl_udc *udc)
 394 {
 395         unsigned int tmp;
 396
 397         pr_debug("%s\n", __func__);
 398
 399         /* if we're in OTG mode, and the Host is currently using the port,
 400          * stop now and don't rip the controller out from under the
 401          * ehci driver
 402          */
 403         if (udc->gadget.is_otg) {
 404                 if (!(fsl_readl(&dr_regs->otgsc) & OTGSC_STS_USB_ID)) {
 405                         pr_debug("udc: Leaving early\n");
 406                         return;
 407                 }
 408         }
 409
 410         /* disable all INTR */
 411         fsl_writel(0, &dr_regs->usbintr);
 412
 413         /* Set stopped bit for isr */
 414         udc->stopped = 1;
 415
 416         /* disable IO output */
 417 /*      usb_sys_regs->control = 0; */
 418
 419         /* set controller to Stop */
 420         tmp = fsl_readl(&dr_regs->usbcmd);
 421         tmp &= ~USB_CMD_RUN_STOP;
 422         fsl_writel(tmp, &dr_regs->usbcmd);
 423 }
 424
 425 static void dr_ep_setup(unsigned char ep_num, unsigned char dir,
 426                         unsigned char ep_type)
 427 {
 428         unsigned int tmp_epctrl = 0;
 429
 430         tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 431         if (dir) {
 432                 if (ep_num)
 433                         tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
 434                 tmp_epctrl |= EPCTRL_TX_ENABLE;
 435                 tmp_epctrl &= ~EPCTRL_TX_TYPE;
 436                 tmp_epctrl |= ((unsigned int)(ep_type)
 437                                 << EPCTRL_TX_EP_TYPE_SHIFT);
 438         } else {
 439                 if (ep_num)
 440                         tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
 441                 tmp_epctrl |= EPCTRL_RX_ENABLE;
 442                 tmp_epctrl &= ~EPCTRL_RX_TYPE;
 443                 tmp_epctrl |= ((unsigned int)(ep_type)
 444                                 << EPCTRL_RX_EP_TYPE_SHIFT);
 445         }
 446
 447         fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
 448 }
 449
 450 static void
 451 dr_ep_change_stall(unsigned char ep_num, unsigned char dir, int value)
 452 {
 453         u32 tmp_epctrl = 0;
 454
 455         tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 456
 457         if (value) {
 458                 /* set the stall bit */
 459                 if (dir)
 460                         tmp_epctrl |= EPCTRL_TX_EP_STALL;
 461                 else
 462                         tmp_epctrl |= EPCTRL_RX_EP_STALL;
 463         } else {
 464                 /* clear the stall bit and reset data toggle */
 465                 if (dir) {
 466                         tmp_epctrl &= ~EPCTRL_TX_EP_STALL;
 467                         tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
 468                 } else {
 469                         tmp_epctrl &= ~EPCTRL_RX_EP_STALL;
 470                         tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
 471                 }
 472         }
 473         fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
 474 }
 475
 476 /* Get stall status of a specific ep
 477    Return: 0: not stalled; 1:stalled */
 478 static int dr_ep_get_stall(unsigned char ep_num, unsigned char dir)
 479 {
 480         u32 epctrl;
 481
 482         epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 483         if (dir)
 484                 return (epctrl & EPCTRL_TX_EP_STALL) ? 1 : 0;
 485         else
 486                 return (epctrl & EPCTRL_RX_EP_STALL) ? 1 : 0;
 487 }
 488
 489 /********************************************************************
 490         Internal Structure Build up functions
 491 ********************************************************************/
 492
 493 /*------------------------------------------------------------------
 494 * struct_ep_qh_setup(): set the Endpoint Capabilites field of QH
 495  * @zlt: Zero Length Termination Select (1: disable; 0: enable)
 496  * @mult: Mult field
 497  ------------------------------------------------------------------*/
 498 static void struct_ep_qh_setup(struct fsl_udc *udc, unsigned char ep_num,
 499                 unsigned char dir, unsigned char ep_type,
 500                 unsigned int max_pkt_len,
 501                 unsigned int zlt, unsigned char mult)
 502 {
 503         struct ep_queue_head *p_QH = &udc->ep_qh[2 * ep_num + dir];
 504         unsigned int tmp = 0;
 505
 506         /* set the Endpoint Capabilites in QH */
 507         switch (ep_type) {
 508         case USB_ENDPOINT_XFER_CONTROL:
 509                 /* Interrupt On Setup (IOS). for control ep  */
 510                 tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
 511                         | EP_QUEUE_HEAD_IOS;
 512                 break;
 513         case USB_ENDPOINT_XFER_ISOC:
 514                 tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
 515                         | (mult << EP_QUEUE_HEAD_MULT_POS);
 516                 break;
 517         case USB_ENDPOINT_XFER_BULK:
 518         case USB_ENDPOINT_XFER_INT:
 519                 tmp = max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS;
 520                 break;
 521         default:
 522                 VDBG("error ep type is %d", ep_type);
 523                 return;
 524         }
 525         if (zlt)
 526                 tmp |= EP_QUEUE_HEAD_ZLT_SEL;
 527
 528         p_QH->max_pkt_length = cpu_to_hc32(tmp);
 529         p_QH->next_dtd_ptr = 1;
 530         p_QH->size_ioc_int_sts = 0;
 531 }
 532
 533 /* Setup qh structure and ep register for ep0. */
 534 static void ep0_setup(struct fsl_udc *udc)
 535 {
 536         /* the intialization of an ep includes: fields in QH, Regs,
 537          * fsl_ep struct */
 538         struct_ep_qh_setup(udc, 0, USB_RECV, USB_ENDPOINT_XFER_CONTROL,
 539                         USB_MAX_CTRL_PAYLOAD, 0, 0);
 540         struct_ep_qh_setup(udc, 0, USB_SEND, USB_ENDPOINT_XFER_CONTROL,
 541                         USB_MAX_CTRL_PAYLOAD, 0, 0);
 542         dr_ep_setup(0, USB_RECV, USB_ENDPOINT_XFER_CONTROL);
 543         dr_ep_setup(0, USB_SEND, USB_ENDPOINT_XFER_CONTROL);
 544
 545         return;
 546
 547 }
 548
 549 /***********************************************************************
 550                 Endpoint Management Functions
 551 ***********************************************************************/
 552
 553 /*-------------------------------------------------------------------------
 554  * when configurations are set, or when interface settings change
 555  * for example the do_set_interface() in gadget layer,
 556  * the driver will enable or disable the relevant endpoints
 557  * ep0 doesn't use this routine. It is always enabled.
 558 -------------------------------------------------------------------------*/
 559 static int fsl_ep_enable(struct usb_ep *_ep,
 560                 const struct usb_endpoint_descriptor *desc)
 561 {
 562         struct fsl_udc *udc = NULL;
 563         struct fsl_ep *ep = NULL;
 564         unsigned short max = 0;
 565         unsigned char mult = 0, zlt;
 566         int retval = -EINVAL;
 567         unsigned long flags = 0;
 568
 569         ep = container_of(_ep, struct fsl_ep, ep);
 570
 571         /* catch various bogus parameters */
 572         if (!_ep || !desc
 573                         || (desc->bDescriptorType != USB_DT_ENDPOINT))
 574                 return -EINVAL;
 575
 576         udc = ep->udc;
 577
 578         if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN))
 579                 return -ESHUTDOWN;
 580
 581         max = usb_endpoint_maxp(desc);
 582
 583         /* Disable automatic zlp generation.  Driver is responsible to indicate
 584          * explicitly through req->req.zero.  This is needed to enable multi-td
 585          * request. */
 586         zlt = 1;
 587
 588         /* Assume the max packet size from gadget is always correct */
 589         switch (desc->bmAttributes & 0x03) {
 590         case USB_ENDPOINT_XFER_CONTROL:
 591         case USB_ENDPOINT_XFER_BULK:
 592         case USB_ENDPOINT_XFER_INT:
 593                 /* mult = 0.  Execute N Transactions as demonstrated by
 594                  * the USB variable length packet protocol where N is
 595                  * computed using the Maximum Packet Length (dQH) and
 596                  * the Total Bytes field (dTD) */
 597                 mult = 0;
 598                 break;
 599         case USB_ENDPOINT_XFER_ISOC:
 600                 /* Calculate transactions needed for high bandwidth iso */
 601                 mult = (unsigned char)(1 + ((max >> 11) & 0x03));
 602                 max = max & 0x7ff;      /* bit 0~10 */
 603                 /* 3 transactions at most */
 604                 if (mult > 3)
 605                         goto en_done;
 606                 break;
 607         default:
 608                 goto en_done;
 609         }
 610
 611         spin_lock_irqsave(&udc->lock, flags);
 612         ep->ep.maxpacket = max;
 613         ep->ep.desc = desc;
 614         ep->stopped = 0;
 615
 616         /* Controller related setup */
 617         /* Init EPx Queue Head (Ep Capabilites field in QH
 618          * according to max, zlt, mult) */
 619         struct_ep_qh_setup(udc, (unsigned char) ep_index(ep),
 620                         (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
 621                                         ?  USB_SEND : USB_RECV),
 622                         (unsigned char) (desc->bmAttributes
 623                                         & USB_ENDPOINT_XFERTYPE_MASK),
 624                         max, zlt, mult);
 625
 626         /* Init endpoint ctrl register */
 627         dr_ep_setup((unsigned char) ep_index(ep),
 628                         (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
 629                                         ? USB_SEND : USB_RECV),
 630                         (unsigned char) (desc->bmAttributes
 631                                         & USB_ENDPOINT_XFERTYPE_MASK));
 632
 633         spin_unlock_irqrestore(&udc->lock, flags);
 634         retval = 0;
 635
 636         VDBG("enabled %s (ep%d%s) maxpacket %d",ep->ep.name,
 637                         ep->ep.desc->bEndpointAddress & 0x0f,
 638                         (desc->bEndpointAddress & USB_DIR_IN)
 639                                 ? "in" : "out", max);
 640 en_done:
 641         return retval;
 642 }
 643
 644 /*---------------------------------------------------------------------
 645  * @ep : the ep being unconfigured. May not be ep0
 646  * Any pending and uncomplete req will complete with status (-ESHUTDOWN)
 647 *---------------------------------------------------------------------*/
 648 static int fsl_ep_disable(struct usb_ep *_ep)
 649 {
 650         struct fsl_udc *udc = NULL;
 651         struct fsl_ep *ep = NULL;
 652         unsigned long flags = 0;
 653         u32 epctrl;
 654         int ep_num;
 655
 656         ep = container_of(_ep, struct fsl_ep, ep);
 657         if (!_ep || !ep->ep.desc) {
 658                 VDBG("%s not enabled", _ep ? ep->ep.name : NULL);
 659                 return -EINVAL;
 660         }
 661
 662         /* disable ep on controller */
 663         ep_num = ep_index(ep);
 664         epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 665         if (ep_is_in(ep)) {
 666                 epctrl &= ~(EPCTRL_TX_ENABLE | EPCTRL_TX_TYPE);
 667                 epctrl |= EPCTRL_EP_TYPE_BULK << EPCTRL_TX_EP_TYPE_SHIFT;
 668         } else {
 669                 epctrl &= ~(EPCTRL_RX_ENABLE | EPCTRL_TX_TYPE);
 670                 epctrl |= EPCTRL_EP_TYPE_BULK << EPCTRL_RX_EP_TYPE_SHIFT;
 671         }
 672         fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
 673
 674         udc = (struct fsl_udc *)ep->udc;
 675         spin_lock_irqsave(&udc->lock, flags);
 676
 677         /* nuke all pending requests (does flush) */
 678         nuke(ep, -ESHUTDOWN);
 679
 680         ep->ep.desc = NULL;
 681         ep->stopped = 1;
 682         spin_unlock_irqrestore(&udc->lock, flags);
 683
 684         VDBG("disabled %s OK", _ep->name);
 685         return 0;
 686 }
 687
 688 /*---------------------------------------------------------------------
 689  * allocate a request object used by this endpoint
 690  * the main operation is to insert the req->queue to the eq->queue
 691  * Returns the request, or null if one could not be allocated
 692 *---------------------------------------------------------------------*/
 693 static struct usb_request *
 694 fsl_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
 695 {
 696         struct fsl_req *req = NULL;
 697
 698         req = kzalloc(sizeof *req, gfp_flags);
 699         if (!req)
 700                 return NULL;
 701
 702         req->req.dma = DMA_ADDR_INVALID;
 703         INIT_LIST_HEAD(&req->queue);
 704
 705         return &req->req;
 706 }
 707
 708 static void fsl_free_request(struct usb_ep *_ep, struct usb_request *_req)
 709 {
 710         struct fsl_req *req = NULL;
 711
 712         req = container_of(_req, struct fsl_req, req);
 713
 714         if (_req)
 715                 kfree(req);
 716 }
 717
 718 /* Actually add a dTD chain to an empty dQH and let go */
 719 static void fsl_prime_ep(struct fsl_ep *ep, struct ep_td_struct *td)
 720 {
 721         struct ep_queue_head *qh = get_qh_by_ep(ep);
 722
 723         /* Write dQH next pointer and terminate bit to 0 */
 724         qh->next_dtd_ptr = cpu_to_hc32(td->td_dma
 725                         & EP_QUEUE_HEAD_NEXT_POINTER_MASK);
 726
 727         /* Clear active and halt bit */
 728         qh->size_ioc_int_sts &= cpu_to_hc32(~(EP_QUEUE_HEAD_STATUS_ACTIVE
 729                                         | EP_QUEUE_HEAD_STATUS_HALT));
 730
 731         /* Ensure that updates to the QH will occur before priming. */
 732         wmb();
 733
 734         /* Prime endpoint by writing correct bit to ENDPTPRIME */
 735         fsl_writel(ep_is_in(ep) ? (1 << (ep_index(ep) + 16))
 736                         : (1 << (ep_index(ep))), &dr_regs->endpointprime);
 737 }
 738
 739 /* Add dTD chain to the dQH of an EP */
 740 static void fsl_queue_td(struct fsl_ep *ep, struct fsl_req *req)
 741 {
 742         u32 temp, bitmask, tmp_stat;
 743
 744         /* VDBG("QH addr Register 0x%8x", dr_regs->endpointlistaddr);
 745         VDBG("ep_qh[%d] addr is 0x%8x", i, (u32)&(ep->udc->ep_qh[i])); */
 746
 747         bitmask = ep_is_in(ep)
 748                 ? (1 << (ep_index(ep) + 16))
 749                 : (1 << (ep_index(ep)));
 750
 751         /* check if the pipe is empty */
 752         if (!(list_empty(&ep->queue)) && !(ep_index(ep) == 0)) {
 753                 /* Add td to the end */
 754                 struct fsl_req *lastreq;
 755                 lastreq = list_entry(ep->queue.prev, struct fsl_req, queue);
 756                 lastreq->tail->next_td_ptr =
 757                         cpu_to_hc32(req->head->td_dma & DTD_ADDR_MASK);
 758                 /* Ensure dTD's next dtd pointer to be updated */
 759                 wmb();
 760                 /* Read prime bit, if 1 goto done */
 761                 if (fsl_readl(&dr_regs->endpointprime) & bitmask)
 762                         return;
 763
 764                 do {
 765                         /* Set ATDTW bit in USBCMD */
 766                         temp = fsl_readl(&dr_regs->usbcmd);
 767                         fsl_writel(temp | USB_CMD_ATDTW, &dr_regs->usbcmd);
 768
 769                         /* Read correct status bit */
 770                         tmp_stat = fsl_readl(&dr_regs->endptstatus) & bitmask;
 771
 772                 } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_ATDTW));
 773
 774                 /* Write ATDTW bit to 0 */
 775                 temp = fsl_readl(&dr_regs->usbcmd);
 776                 fsl_writel(temp & ~USB_CMD_ATDTW, &dr_regs->usbcmd);
 777
 778                 if (tmp_stat)
 779                         return;
 780         }
 781
 782         fsl_prime_ep(ep, req->head);
 783 }
 784
 785 /* Fill in the dTD structure
 786  * @req: request that the transfer belongs to
 787  * @length: return actually data length of the dTD
 788  * @dma: return dma address of the dTD
 789  * @is_last: return flag if it is the last dTD of the request
 790  * return: pointer to the built dTD */
 791 static struct ep_td_struct *fsl_build_dtd(struct fsl_req *req, unsigned *length,
 792                 dma_addr_t *dma, int *is_last, gfp_t gfp_flags)
 793 {
 794         u32 swap_temp;
 795         struct ep_td_struct *dtd;
 796
 797         /* how big will this transfer be? */
 798         *length = min(req->req.length - req->req.actual,
 799                         (unsigned)EP_MAX_LENGTH_TRANSFER);
 800
 801         dtd = dma_pool_alloc(udc_controller->td_pool, gfp_flags, dma);
 802         if (dtd == NULL)
 803                 return dtd;
 804
 805         dtd->td_dma = *dma;
 806         /* Clear reserved field */
 807         swap_temp = hc32_to_cpu(dtd->size_ioc_sts);
 808         swap_temp &= ~DTD_RESERVED_FIELDS;
 809         dtd->size_ioc_sts = cpu_to_hc32(swap_temp);
 810
 811         /* Init all of buffer page pointers */
 812         swap_temp = (u32) (req->req.dma + req->req.actual);
 813         dtd->buff_ptr0 = cpu_to_hc32(swap_temp);
 814         dtd->buff_ptr1 = cpu_to_hc32(swap_temp + 0x1000);
 815         dtd->buff_ptr2 = cpu_to_hc32(swap_temp + 0x2000);
 816         dtd->buff_ptr3 = cpu_to_hc32(swap_temp + 0x3000);
 817         dtd->buff_ptr4 = cpu_to_hc32(swap_temp + 0x4000);
 818
 819         req->req.actual += *length;
 820
 821         /* zlp is needed if req->req.zero is set */
 822         if (req->req.zero) {
 823                 if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0)
 824                         *is_last = 1;
 825                 else
 826                         *is_last = 0;
 827         } else if (req->req.length == req->req.actual)
 828                 *is_last = 1;
 829         else
 830                 *is_last = 0;
 831
 832         if ((*is_last) == 0)
 833                 VDBG("multi-dtd request!");
 834         /* Fill in the transfer size; set active bit */
 835         swap_temp = ((*length << DTD_LENGTH_BIT_POS) | DTD_STATUS_ACTIVE);
 836
 837         /* Enable interrupt for the last dtd of a request */
 838         if (*is_last && !req->req.no_interrupt)
 839                 swap_temp |= DTD_IOC;
 840
 841         dtd->size_ioc_sts = cpu_to_hc32(swap_temp);
 842
 843         mb();
 844
 845         VDBG("length = %d address= 0x%x", *length, (int)*dma);
 846
 847         return dtd;
 848 }
 849
 850 /* Generate dtd chain for a request */
 851 static int fsl_req_to_dtd(struct fsl_req *req, gfp_t gfp_flags)
 852 {
 853         unsigned        count;
 854         int             is_last;
 855         int             is_first =1;
 856         struct ep_td_struct     *last_dtd = NULL, *dtd;
 857         dma_addr_t dma;
 858
 859         do {
 860                 dtd = fsl_build_dtd(req, &count, &dma, &is_last, gfp_flags);
 861                 if (dtd == NULL)
 862                         return -ENOMEM;
 863
 864                 if (is_first) {
 865                         is_first = 0;
 866                         req->head = dtd;
 867                 } else {
 868                         last_dtd->next_td_ptr = cpu_to_hc32(dma);
 869                         last_dtd->next_td_virt = dtd;
 870                 }
 871                 last_dtd = dtd;
 872
 873                 req->dtd_count++;
 874         } while (!is_last);
 875
 876         dtd->next_td_ptr = cpu_to_hc32(DTD_NEXT_TERMINATE);
 877
 878         req->tail = dtd;
 879
 880         return 0;
 881 }
 882
 883 /* queues (submits) an I/O request to an endpoint */
 884 static int
 885 fsl_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
 886 {
 887         struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
 888         struct fsl_req *req = container_of(_req, struct fsl_req, req);
 889         struct fsl_udc *udc;
 890         unsigned long flags;
 891
 892         /* catch various bogus parameters */
 893         if (!_req || !req->req.complete || !req->req.buf
 894                         || !list_empty(&req->queue)) {
 895                 VDBG("%s, bad params", __func__);
 896                 return -EINVAL;
 897         }
 898         if (unlikely(!_ep || !ep->ep.desc)) {
 899                 VDBG("%s, bad ep", __func__);
 900                 return -EINVAL;
 901         }
 902         if (usb_endpoint_xfer_isoc(ep->ep.desc)) {
 903                 if (req->req.length > ep->ep.maxpacket)
 904                         return -EMSGSIZE;
 905         }
 906
 907         udc = ep->udc;
 908         if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
 909                 return -ESHUTDOWN;
 910
 911         req->ep = ep;
 912
 913         /* map virtual address to hardware */
 914         if (req->req.dma == DMA_ADDR_INVALID) {
 915                 req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
 916                                         req->req.buf,
 917                                         req->req.length, ep_is_in(ep)
 918                                                 ? DMA_TO_DEVICE
 919                                                 : DMA_FROM_DEVICE);
 920                 req->mapped = 1;
 921         } else {
 922                 dma_sync_single_for_device(ep->udc->gadget.dev.parent,
 923                                         req->req.dma, req->req.length,
 924                                         ep_is_in(ep)
 925                                                 ? DMA_TO_DEVICE
 926                                                 : DMA_FROM_DEVICE);
 927                 req->mapped = 0;
 928         }
 929
 930         req->req.status = -EINPROGRESS;
 931         req->req.actual = 0;
 932         req->dtd_count = 0;
 933
 934         /* build dtds and push them to device queue */
 935         if (!fsl_req_to_dtd(req, gfp_flags)) {
 936                 spin_lock_irqsave(&udc->lock, flags);
 937                 fsl_queue_td(ep, req);
 938         } else {
 939                 return -ENOMEM;
 940         }
 941
 942         /* irq handler advances the queue */
 943         if (req != NULL)
 944                 list_add_tail(&req->queue, &ep->queue);
 945         spin_unlock_irqrestore(&udc->lock, flags);
 946
 947         return 0;
 948 }
 949
 950 /* dequeues (cancels, unlinks) an I/O request from an endpoint */
 951 static int fsl_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
 952 {
 953         struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
 954         struct fsl_req *req;
 955         unsigned long flags;
 956         int ep_num, stopped, ret = 0;
 957         u32 epctrl;
 958
 959         if (!_ep || !_req)
 960                 return -EINVAL;
 961
 962         spin_lock_irqsave(&ep->udc->lock, flags);
 963         stopped = ep->stopped;
 964
 965         /* Stop the ep before we deal with the queue */
 966         ep->stopped = 1;
 967         ep_num = ep_index(ep);
 968         epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
 969         if (ep_is_in(ep))
 970                 epctrl &= ~EPCTRL_TX_ENABLE;
 971         else
 972                 epctrl &= ~EPCTRL_RX_ENABLE;
 973         fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
 974
 975         /* make sure it's actually queued on this endpoint */
 976         list_for_each_entry(req, &ep->queue, queue) {
 977                 if (&req->req == _req)
 978                         break;
 979         }
 980         if (&req->req != _req) {
 981                 ret = -EINVAL;
 982                 goto out;
 983         }
 984
 985         /* The request is in progress, or completed but not dequeued */
 986         if (ep->queue.next == &req->queue) {
 987                 _req->status = -ECONNRESET;
 988                 fsl_ep_fifo_flush(_ep); /* flush current transfer */
 989
 990                 /* The request isn't the last request in this ep queue */
 991                 if (req->queue.next != &ep->queue) {
 992                         struct fsl_req *next_req;
 993
 994                         next_req = list_entry(req->queue.next, struct fsl_req,
 995                                         queue);
 996
 997                         /* prime with dTD of next request */
 998                         fsl_prime_ep(ep, next_req->head);
 999                 }
1000         /* The request hasn't been processed, patch up the TD chain */
1001         } else {
1002                 struct fsl_req *prev_req;
1003
1004                 prev_req = list_entry(req->queue.prev, struct fsl_req, queue);
1005                 prev_req->tail->next_td_ptr = req->tail->next_td_ptr;
1006         }
1007
1008         done(ep, req, -ECONNRESET);
1009
1010         /* Enable EP */
1011 out:    epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
1012         if (ep_is_in(ep))
1013                 epctrl |= EPCTRL_TX_ENABLE;
1014         else
1015                 epctrl |= EPCTRL_RX_ENABLE;
1016         fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
1017         ep->stopped = stopped;
1018
1019         spin_unlock_irqrestore(&ep->udc->lock, flags);
1020         return ret;
1021 }
1022
1023 /*-------------------------------------------------------------------------*/
1024
1025 /*-----------------------------------------------------------------
1026  * modify the endpoint halt feature
1027  * @ep: the non-isochronous endpoint being stalled
1028  * @value: 1--set halt  0--clear halt
1029  * Returns zero, or a negative error code.
1030 *----------------------------------------------------------------*/
1031 static int fsl_ep_set_halt(struct usb_ep *_ep, int value)
1032 {
1033         struct fsl_ep *ep = NULL;
1034         unsigned long flags = 0;
1035         int status = -EOPNOTSUPP;       /* operation not supported */
1036         unsigned char ep_dir = 0, ep_num = 0;
1037         struct fsl_udc *udc = NULL;
1038
1039         ep = container_of(_ep, struct fsl_ep, ep);
1040         udc = ep->udc;
1041         if (!_ep || !ep->ep.desc) {
1042                 status = -EINVAL;
1043                 goto out;
1044         }
1045
1046         if (usb_endpoint_xfer_isoc(ep->ep.desc)) {
1047                 status = -EOPNOTSUPP;
1048                 goto out;
1049         }
1050
1051         /* Attempt to halt IN ep will fail if any transfer requests
1052          * are still queue */
1053         if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
1054                 status = -EAGAIN;
1055                 goto out;
1056         }
1057
1058         status = 0;
1059         ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
1060         ep_num = (unsigned char)(ep_index(ep));
1061         spin_lock_irqsave(&ep->udc->lock, flags);
1062         dr_ep_change_stall(ep_num, ep_dir, value);
1063         spin_unlock_irqrestore(&ep->udc->lock, flags);
1064
1065         if (ep_index(ep) == 0) {
1066                 udc->ep0_state = WAIT_FOR_SETUP;
1067                 udc->ep0_dir = 0;
1068         }
1069 out:
1070         VDBG(" %s %s halt stat %d", ep->ep.name,
1071                         value ?  "set" : "clear", status);
1072
1073         return status;
1074 }
1075
1076 static int fsl_ep_fifo_status(struct usb_ep *_ep)
1077 {
1078         struct fsl_ep *ep;
1079         struct fsl_udc *udc;
1080         int size = 0;
1081         u32 bitmask;
1082         struct ep_queue_head *qh;
1083
1084         ep = container_of(_ep, struct fsl_ep, ep);
1085         if (!_ep || (!ep->ep.desc && ep_index(ep) != 0))
1086                 return -ENODEV;
1087
1088         udc = (struct fsl_udc *)ep->udc;
1089
1090         if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
1091                 return -ESHUTDOWN;
1092
1093         qh = get_qh_by_ep(ep);
1094
1095         bitmask = (ep_is_in(ep)) ? (1 << (ep_index(ep) + 16)) :
1096             (1 << (ep_index(ep)));
1097
1098         if (fsl_readl(&dr_regs->endptstatus) & bitmask)
1099                 size = (qh->size_ioc_int_sts & DTD_PACKET_SIZE)
1100                     >> DTD_LENGTH_BIT_POS;
1101
1102         pr_debug("%s %u\n", __func__, size);
1103         return size;
1104 }
1105
1106 static void fsl_ep_fifo_flush(struct usb_ep *_ep)
1107 {
1108         struct fsl_ep *ep;
1109         int ep_num, ep_dir;
1110         u32 bits;
1111         unsigned long timeout;
1112 #define FSL_UDC_FLUSH_TIMEOUT 1000
1113
1114         if (!_ep) {
1115                 return;
1116         } else {
1117                 ep = container_of(_ep, struct fsl_ep, ep);
1118                 if (!ep->ep.desc)
1119                         return;
1120         }
1121         ep_num = ep_index(ep);
1122         ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
1123
1124         if (ep_num == 0)
1125                 bits = (1 << 16) | 1;
1126         else if (ep_dir == USB_SEND)
1127                 bits = 1 << (16 + ep_num);
1128         else
1129                 bits = 1 << ep_num;
1130
1131         timeout = jiffies + FSL_UDC_FLUSH_TIMEOUT;
1132         do {
1133                 fsl_writel(bits, &dr_regs->endptflush);
1134
1135                 /* Wait until flush complete */
1136                 while (fsl_readl(&dr_regs->endptflush)) {
1137                         if (time_after(jiffies, timeout)) {
1138                                 ERR("ep flush timeout\n");
1139                                 return;
1140                         }
1141                         cpu_relax();
1142                 }
1143                 /* See if we need to flush again */
1144         } while (fsl_readl(&dr_regs->endptstatus) & bits);
1145 }
1146
1147 static struct usb_ep_ops fsl_ep_ops = {
1148         .enable = fsl_ep_enable,
1149         .disable = fsl_ep_disable,
1150
1151         .alloc_request = fsl_alloc_request,
1152         .free_request = fsl_free_request,
1153
1154         .queue = fsl_ep_queue,
1155         .dequeue = fsl_ep_dequeue,
1156
1157         .set_halt = fsl_ep_set_halt,
1158         .fifo_status = fsl_ep_fifo_status,
1159         .fifo_flush = fsl_ep_fifo_flush,        /* flush fifo */
1160 };
1161
1162 /*-------------------------------------------------------------------------
1163                 Gadget Driver Layer Operations
1164 -------------------------------------------------------------------------*/
1165
1166 /*----------------------------------------------------------------------
1167  * Get the current frame number (from DR frame_index Reg )
1168  *----------------------------------------------------------------------*/
1169 static int fsl_get_frame(struct usb_gadget *gadget)
1170 {
1171         return (int)(fsl_readl(&dr_regs->frindex) & USB_FRINDEX_MASKS);
1172 }
1173
1174 /*-----------------------------------------------------------------------
1175  * Tries to wake up the host connected to this gadget
1176  -----------------------------------------------------------------------*/
1177 static int fsl_wakeup(struct usb_gadget *gadget)
1178 {
1179         struct fsl_udc *udc = container_of(gadget, struct fsl_udc, gadget);
1180         u32 portsc;
1181
1182         /* Remote wakeup feature not enabled by host */
1183         if (!udc->remote_wakeup)
1184                 return -ENOTSUPP;
1185
1186         portsc = fsl_readl(&dr_regs->portsc1);
1187         /* not suspended? */
1188         if (!(portsc & PORTSCX_PORT_SUSPEND))
1189                 return 0;
1190         /* trigger force resume */
1191         portsc |= PORTSCX_PORT_FORCE_RESUME;
1192         fsl_writel(portsc, &dr_regs->portsc1);
1193         return 0;
1194 }
1195
1196 static int can_pullup(struct fsl_udc *udc)
1197 {
1198         return udc->driver && udc->softconnect && udc->vbus_active;
1199 }
1200
1201 /* Notify controller that VBUS is powered, Called by whatever
1202    detects VBUS sessions */
1203 static int fsl_vbus_session(struct usb_gadget *gadget, int is_active)
1204 {
1205         struct fsl_udc  *udc;
1206         unsigned long   flags;
1207
1208         udc = container_of(gadget, struct fsl_udc, gadget);
1209         spin_lock_irqsave(&udc->lock, flags);
1210         VDBG("VBUS %s", is_active ? "on" : "off");
1211         udc->vbus_active = (is_active != 0);
1212         if (can_pullup(udc))
1213                 fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
1214                                 &dr_regs->usbcmd);
1215         else
1216                 fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
1217                                 &dr_regs->usbcmd);
1218         spin_unlock_irqrestore(&udc->lock, flags);
1219         return 0;
1220 }
1221
1222 /* constrain controller's VBUS power usage
1223  * This call is used by gadget drivers during SET_CONFIGURATION calls,
1224  * reporting how much power the device may consume.  For example, this
1225  * could affect how quickly batteries are recharged.
1226  *
1227  * Returns zero on success, else negative errno.
1228  */
1229 static int fsl_vbus_draw(struct usb_gadget *gadget, unsigned mA)
1230 {
1231         struct fsl_udc *udc;
1232
1233         udc = container_of(gadget, struct fsl_udc, gadget);
1234         if (!IS_ERR_OR_NULL(udc->transceiver))
1235                 return usb_phy_set_power(udc->transceiver, mA);
1236         return -ENOTSUPP;
1237 }
1238
1239 /* Change Data+ pullup status
1240  * this func is used by usb_gadget_connect/disconnet
1241  */
1242 static int fsl_pullup(struct usb_gadget *gadget, int is_on)
1243 {
1244         struct fsl_udc *udc;
1245
1246         udc = container_of(gadget, struct fsl_udc, gadget);
1247         udc->softconnect = (is_on != 0);
1248         if (can_pullup(udc))
1249                 fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
1250                                 &dr_regs->usbcmd);
1251         else
1252                 fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
1253                                 &dr_regs->usbcmd);
1254
1255         return 0;
1256 }
1257
1258 static int fsl_start(struct usb_gadget_driver *driver,
1259                 int (*bind)(struct usb_gadget *, struct usb_gadget_driver *));
1260 static int fsl_stop(struct usb_gadget_driver *driver);
1261 /* defined in gadget.h */
1262 static struct usb_gadget_ops fsl_gadget_ops = {
1263         .get_frame = fsl_get_frame,
1264         .wakeup = fsl_wakeup,
1265 /*      .set_selfpowered = fsl_set_selfpowered, */ /* Always selfpowered */
1266         .vbus_session = fsl_vbus_session,
1267         .vbus_draw = fsl_vbus_draw,
1268         .pullup = fsl_pullup,
1269         .start = fsl_start,
1270         .stop = fsl_stop,
1271 };
1272
1273 /* Set protocol stall on ep0, protocol stall will automatically be cleared
1274    on new transaction */
1275 static void ep0stall(struct fsl_udc *udc)
1276 {
1277         u32 tmp;
1278
1279         /* must set tx and rx to stall at the same time */
1280         tmp = fsl_readl(&dr_regs->endptctrl[0]);
1281         tmp |= EPCTRL_TX_EP_STALL | EPCTRL_RX_EP_STALL;
1282         fsl_writel(tmp, &dr_regs->endptctrl[0]);
1283         udc->ep0_state = WAIT_FOR_SETUP;
1284         udc->ep0_dir = 0;
1285 }
1286
1287 /* Prime a status phase for ep0 */
1288 static int ep0_prime_status(struct fsl_udc *udc, int direction)
1289 {
1290         struct fsl_req *req = udc->status_req;
1291         struct fsl_ep *ep;
1292
1293         if (direction == EP_DIR_IN)
1294                 udc->ep0_dir = USB_DIR_IN;
1295         else
1296                 udc->ep0_dir = USB_DIR_OUT;
1297
1298         ep = &udc->eps[0];
1299         if (udc->ep0_state != DATA_STATE_XMIT)
1300                 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1301
1302         req->ep = ep;
1303         req->req.length = 0;
1304         req->req.status = -EINPROGRESS;
1305         req->req.actual = 0;
1306         req->req.complete = NULL;
1307         req->dtd_count = 0;
1308
1309         req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
1310                         req->req.buf, req->req.length,
1311                         ep_is_in(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
1312         req->mapped = 1;
1313
1314         if (fsl_req_to_dtd(req, GFP_ATOMIC) == 0)
1315                 fsl_queue_td(ep, req);
1316         else
1317                 return -ENOMEM;
1318
1319         list_add_tail(&req->queue, &ep->queue);
1320
1321         return 0;
1322 }
1323
1324 static void udc_reset_ep_queue(struct fsl_udc *udc, u8 pipe)
1325 {
1326         struct fsl_ep *ep = get_ep_by_pipe(udc, pipe);
1327
1328         if (ep->name)
1329                 nuke(ep, -ESHUTDOWN);
1330 }
1331
1332 /*
1333  * ch9 Set address
1334  */
1335 static void ch9setaddress(struct fsl_udc *udc, u16 value, u16 index, u16 length)
1336 {
1337         /* Save the new address to device struct */
1338         udc->device_address = (u8) value;
1339         /* Update usb state */
1340         udc->usb_state = USB_STATE_ADDRESS;
1341         /* Status phase */
1342         if (ep0_prime_status(udc, EP_DIR_IN))
1343                 ep0stall(udc);
1344 }
1345
1346 /*
1347  * ch9 Get status
1348  */
1349 static void ch9getstatus(struct fsl_udc *udc, u8 request_type, u16 value,
1350                 u16 index, u16 length)
1351 {
1352         u16 tmp = 0;            /* Status, cpu endian */
1353         struct fsl_req *req;
1354         struct fsl_ep *ep;
1355
1356         ep = &udc->eps[0];
1357
1358         if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1359                 /* Get device status */
1360                 tmp = 1 << USB_DEVICE_SELF_POWERED;
1361                 tmp |= udc->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP;
1362         } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
1363                 /* Get interface status */
1364                 /* We don't have interface information in udc driver */
1365                 tmp = 0;
1366         } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
1367                 /* Get endpoint status */
1368                 struct fsl_ep *target_ep;
1369
1370                 target_ep = get_ep_by_pipe(udc, get_pipe_by_windex(index));
1371
1372                 /* stall if endpoint doesn't exist */
1373                 if (!target_ep->ep.desc)
1374                         goto stall;
1375                 tmp = dr_ep_get_stall(ep_index(target_ep), ep_is_in(target_ep))
1376                                 << USB_ENDPOINT_HALT;
1377         }
1378
1379         udc->ep0_dir = USB_DIR_IN;
1380         /* Borrow the per device status_req */
1381         req = udc->status_req;
1382         /* Fill in the reqest structure */
1383         *((u16 *) req->req.buf) = cpu_to_le16(tmp);
1384
1385         req->ep = ep;
1386         req->req.length = 2;
1387         req->req.status = -EINPROGRESS;
1388         req->req.actual = 0;
1389         req->req.complete = NULL;
1390         req->dtd_count = 0;
1391
1392         req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
1393                                 req->req.buf, req->req.length,
1394                                 ep_is_in(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
1395         req->mapped = 1;
1396
1397         /* prime the data phase */
1398         if ((fsl_req_to_dtd(req, GFP_ATOMIC) == 0))
1399                 fsl_queue_td(ep, req);
1400         else                    /* no mem */
1401                 goto stall;
1402
1403         list_add_tail(&req->queue, &ep->queue);
1404         udc->ep0_state = DATA_STATE_XMIT;
1405         if (ep0_prime_status(udc, EP_DIR_OUT))
1406                 ep0stall(udc);
1407
1408         return;
1409 stall:
1410         ep0stall(udc);
1411 }
1412
1413 static void setup_received_irq(struct fsl_udc *udc,
1414                 struct usb_ctrlrequest *setup)
1415 {
1416         u16 wValue = le16_to_cpu(setup->wValue);
1417         u16 wIndex = le16_to_cpu(setup->wIndex);
1418         u16 wLength = le16_to_cpu(setup->wLength);
1419
1420         udc_reset_ep_queue(udc, 0);
1421
1422         /* We process some stardard setup requests here */
1423         switch (setup->bRequest) {
1424         case USB_REQ_GET_STATUS:
1425                 /* Data+Status phase from udc */
1426                 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
1427                                         != (USB_DIR_IN | USB_TYPE_STANDARD))
1428                         break;
1429                 ch9getstatus(udc, setup->bRequestType, wValue, wIndex, wLength);
1430                 return;
1431
1432         case USB_REQ_SET_ADDRESS:
1433                 /* Status phase from udc */
1434                 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD
1435                                                 | USB_RECIP_DEVICE))
1436                         break;
1437                 ch9setaddress(udc, wValue, wIndex, wLength);
1438                 return;
1439
1440         case USB_REQ_CLEAR_FEATURE:
1441         case USB_REQ_SET_FEATURE:
1442                 /* Status phase from udc */
1443         {
1444                 int rc = -EOPNOTSUPP;
1445                 u16 ptc = 0;
1446
1447                 if ((setup->bRequestType & (USB_RECIP_MASK | USB_TYPE_MASK))
1448                                 == (USB_RECIP_ENDPOINT | USB_TYPE_STANDARD)) {
1449                         int pipe = get_pipe_by_windex(wIndex);
1450                         struct fsl_ep *ep;
1451
1452                         if (wValue != 0 || wLength != 0 || pipe >= udc->max_ep)
1453                                 break;
1454                         ep = get_ep_by_pipe(udc, pipe);
1455
1456                         spin_unlock(&udc->lock);
1457                         rc = fsl_ep_set_halt(&ep->ep,
1458                                         (setup->bRequest == USB_REQ_SET_FEATURE)
1459                                                 ? 1 : 0);
1460                         spin_lock(&udc->lock);
1461
1462                 } else if ((setup->bRequestType & (USB_RECIP_MASK
1463                                 | USB_TYPE_MASK)) == (USB_RECIP_DEVICE
1464                                 | USB_TYPE_STANDARD)) {
1465                         /* Note: The driver has not include OTG support yet.
1466                          * This will be set when OTG support is added */
1467                         if (wValue == USB_DEVICE_TEST_MODE)
1468                                 ptc = wIndex >> 8;
1469                         else if (gadget_is_otg(&udc->gadget)) {
1470                                 if (setup->bRequest ==
1471                                     USB_DEVICE_B_HNP_ENABLE)
1472                                         udc->gadget.b_hnp_enable = 1;
1473                                 else if (setup->bRequest ==
1474                                          USB_DEVICE_A_HNP_SUPPORT)
1475                                         udc->gadget.a_hnp_support = 1;
1476                                 else if (setup->bRequest ==
1477                                          USB_DEVICE_A_ALT_HNP_SUPPORT)
1478                                         udc->gadget.a_alt_hnp_support = 1;
1479                         }
1480                         rc = 0;
1481                 } else
1482                         break;
1483
1484                 if (rc == 0) {
1485                         if (ep0_prime_status(udc, EP_DIR_IN))
1486                                 ep0stall(udc);
1487                 }
1488                 if (ptc) {
1489                         u32 tmp;
1490
1491                         mdelay(10);
1492                         tmp = fsl_readl(&dr_regs->portsc1) | (ptc << 16);
1493                         fsl_writel(tmp, &dr_regs->portsc1);
1494                         printk(KERN_INFO "udc: switch to test mode %d.\n", ptc);
1495                 }
1496
1497                 return;
1498         }
1499
1500         default:
1501                 break;
1502         }
1503
1504         /* Requests handled by gadget */
1505         if (wLength) {
1506                 /* Data phase from gadget, status phase from udc */
1507                 udc->ep0_dir = (setup->bRequestType & USB_DIR_IN)
1508                                 ?  USB_DIR_IN : USB_DIR_OUT;
1509                 spin_unlock(&udc->lock);
1510                 if (udc->driver->setup(&udc->gadget,
1511                                 &udc->local_setup_buff) < 0)
1512                         ep0stall(udc);
1513                 spin_lock(&udc->lock);
1514                 udc->ep0_state = (setup->bRequestType & USB_DIR_IN)
1515                                 ?  DATA_STATE_XMIT : DATA_STATE_RECV;
1516                 /*
1517                  * If the data stage is IN, send status prime immediately.
1518                  * See 2.0 Spec chapter 8.5.3.3 for detail.
1519                  */
1520                 if (udc->ep0_state == DATA_STATE_XMIT)
1521                         if (ep0_prime_status(udc, EP_DIR_OUT))
1522                                 ep0stall(udc);
1523
1524         } else {
1525                 /* No data phase, IN status from gadget */
1526                 udc->ep0_dir = USB_DIR_IN;
1527                 spin_unlock(&udc->lock);
1528                 if (udc->driver->setup(&udc->gadget,
1529                                 &udc->local_setup_buff) < 0)
1530                         ep0stall(udc);
1531                 spin_lock(&udc->lock);
1532                 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1533         }
1534 }
1535
1536 /* Process request for Data or Status phase of ep0
1537  * prime status phase if needed */
1538 static void ep0_req_complete(struct fsl_udc *udc, struct fsl_ep *ep0,
1539                 struct fsl_req *req)
1540 {
1541         if (udc->usb_state == USB_STATE_ADDRESS) {
1542                 /* Set the new address */
1543                 u32 new_address = (u32) udc->device_address;
1544                 fsl_writel(new_address << USB_DEVICE_ADDRESS_BIT_POS,
1545                                 &dr_regs->deviceaddr);
1546         }
1547
1548         done(ep0, req, 0);
1549
1550         switch (udc->ep0_state) {
1551         case DATA_STATE_XMIT:
1552                 /* already primed at setup_received_irq */
1553                 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1554                 break;
1555         case DATA_STATE_RECV:
1556                 /* send status phase */
1557                 if (ep0_prime_status(udc, EP_DIR_IN))
1558                         ep0stall(udc);
1559                 break;
1560         case WAIT_FOR_OUT_STATUS:
1561                 udc->ep0_state = WAIT_FOR_SETUP;
1562                 break;
1563         case WAIT_FOR_SETUP:
1564                 ERR("Unexpect ep0 packets\n");
1565                 break;
1566         default:
1567                 ep0stall(udc);
1568                 break;
1569         }
1570 }
1571
1572 /* Tripwire mechanism to ensure a setup packet payload is extracted without
1573  * being corrupted by another incoming setup packet */
1574 static void tripwire_handler(struct fsl_udc *udc, u8 ep_num, u8 *buffer_ptr)
1575 {
1576         u32 temp;
1577         struct ep_queue_head *qh;
1578         struct fsl_usb2_platform_data *pdata = udc->pdata;
1579
1580         qh = &udc->ep_qh[ep_num * 2 + EP_DIR_OUT];
1581
1582         /* Clear bit in ENDPTSETUPSTAT */
1583         temp = fsl_readl(&dr_regs->endptsetupstat);
1584         fsl_writel(temp | (1 << ep_num), &dr_regs->endptsetupstat);
1585
1586         /* while a hazard exists when setup package arrives */
1587         do {
1588                 /* Set Setup Tripwire */
1589                 temp = fsl_readl(&dr_regs->usbcmd);
1590                 fsl_writel(temp | USB_CMD_SUTW, &dr_regs->usbcmd);
1591
1592                 /* Copy the setup packet to local buffer */
1593                 if (pdata->le_setup_buf) {
1594                         u32 *p = (u32 *)buffer_ptr;
1595                         u32 *s = (u32 *)qh->setup_buffer;
1596
1597                         /* Convert little endian setup buffer to CPU endian */
1598                         *p++ = le32_to_cpu(*s++);
1599                         *p = le32_to_cpu(*s);
1600                 } else {
1601                         memcpy(buffer_ptr, (u8 *) qh->setup_buffer, 8);
1602                 }
1603         } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_SUTW));
1604
1605         /* Clear Setup Tripwire */
1606         temp = fsl_readl(&dr_regs->usbcmd);
1607         fsl_writel(temp & ~USB_CMD_SUTW, &dr_regs->usbcmd);
1608 }
1609
1610 /* process-ep_req(): free the completed Tds for this req */
1611 static int process_ep_req(struct fsl_udc *udc, int pipe,
1612                 struct fsl_req *curr_req)
1613 {
1614         struct ep_td_struct *curr_td;
1615         int     td_complete, actual, remaining_length, j, tmp;
1616         int     status = 0;
1617         int     errors = 0;
1618         struct  ep_queue_head *curr_qh = &udc->ep_qh[pipe];
1619         int direction = pipe % 2;
1620
1621         curr_td = curr_req->head;
1622         td_complete = 0;
1623         actual = curr_req->req.length;
1624
1625         for (j = 0; j < curr_req->dtd_count; j++) {
1626                 remaining_length = (hc32_to_cpu(curr_td->size_ioc_sts)
1627                                         & DTD_PACKET_SIZE)
1628                                 >> DTD_LENGTH_BIT_POS;
1629                 actual -= remaining_length;
1630
1631                 errors = hc32_to_cpu(curr_td->size_ioc_sts);
1632                 if (errors & DTD_ERROR_MASK) {
1633                         if (errors & DTD_STATUS_HALTED) {
1634                                 ERR("dTD error %08x QH=%d\n", errors, pipe);
1635                                 /* Clear the errors and Halt condition */
1636                                 tmp = hc32_to_cpu(curr_qh->size_ioc_int_sts);
1637                                 tmp &= ~errors;
1638                                 curr_qh->size_ioc_int_sts = cpu_to_hc32(tmp);
1639                                 status = -EPIPE;
1640                                 /* FIXME: continue with next queued TD? */
1641
1642                                 break;
1643                         }
1644                         if (errors & DTD_STATUS_DATA_BUFF_ERR) {
1645                                 VDBG("Transfer overflow");
1646                                 status = -EPROTO;
1647                                 break;
1648                         } else if (errors & DTD_STATUS_TRANSACTION_ERR) {
1649                                 VDBG("ISO error");
1650                                 status = -EILSEQ;
1651                                 break;
1652                         } else
1653                                 ERR("Unknown error has occurred (0x%x)!\n",
1654                                         errors);
1655
1656                 } else if (hc32_to_cpu(curr_td->size_ioc_sts)
1657                                 & DTD_STATUS_ACTIVE) {
1658                         VDBG("Request not complete");
1659                         status = REQ_UNCOMPLETE;
1660                         return status;
1661                 } else if (remaining_length) {
1662                         if (direction) {
1663                                 VDBG("Transmit dTD remaining length not zero");
1664                                 status = -EPROTO;
1665                                 break;
1666                         } else {
1667                                 td_complete++;
1668                                 break;
1669                         }
1670                 } else {
1671                         td_complete++;
1672                         VDBG("dTD transmitted successful");
1673                 }
1674
1675                 if (j != curr_req->dtd_count - 1)
1676                         curr_td = (struct ep_td_struct *)curr_td->next_td_virt;
1677         }
1678
1679         if (status)
1680                 return status;
1681
1682         curr_req->req.actual = actual;
1683
1684         return 0;
1685 }
1686
1687 /* Process a DTD completion interrupt */
1688 static void dtd_complete_irq(struct fsl_udc *udc)
1689 {
1690         u32 bit_pos;
1691         int i, ep_num, direction, bit_mask, status;
1692         struct fsl_ep *curr_ep;
1693         struct fsl_req *curr_req, *temp_req;
1694
1695         /* Clear the bits in the register */
1696         bit_pos = fsl_readl(&dr_regs->endptcomplete);
1697         fsl_writel(bit_pos, &dr_regs->endptcomplete);
1698
1699         if (!bit_pos)
1700                 return;
1701
1702         for (i = 0; i < udc->max_ep; i++) {
1703                 ep_num = i >> 1;
1704                 direction = i % 2;
1705
1706                 bit_mask = 1 << (ep_num + 16 * direction);
1707
1708                 if (!(bit_pos & bit_mask))
1709                         continue;
1710
1711                 curr_ep = get_ep_by_pipe(udc, i);
1712
1713                 /* If the ep is configured */
1714                 if (curr_ep->name == NULL) {
1715                         WARNING("Invalid EP?");
1716                         continue;
1717                 }
1718
1719                 /* process the req queue until an uncomplete request */
1720                 list_for_each_entry_safe(curr_req, temp_req, &curr_ep->queue,
1721                                 queue) {
1722                         status = process_ep_req(udc, i, curr_req);
1723
1724                         VDBG("status of process_ep_req= %d, ep = %d",
1725                                         status, ep_num);
1726                         if (status == REQ_UNCOMPLETE)
1727                                 break;
1728                         /* write back status to req */
1729                         curr_req->req.status = status;
1730
1731                         if (ep_num == 0) {
1732                                 ep0_req_complete(udc, curr_ep, curr_req);
1733                                 break;
1734                         } else
1735                                 done(curr_ep, curr_req, status);
1736                 }
1737         }
1738 }
1739
1740 static inline enum usb_device_speed portscx_device_speed(u32 reg)
1741 {
1742         switch (reg & PORTSCX_PORT_SPEED_MASK) {
1743         case PORTSCX_PORT_SPEED_HIGH:
1744                 return USB_SPEED_HIGH;
1745         case PORTSCX_PORT_SPEED_FULL:
1746                 return USB_SPEED_FULL;
1747         case PORTSCX_PORT_SPEED_LOW:
1748                 return USB_SPEED_LOW;
1749         default:
1750                 return USB_SPEED_UNKNOWN;
1751         }
1752 }
1753
1754 /* Process a port change interrupt */
1755 static void port_change_irq(struct fsl_udc *udc)
1756 {
1757         if (udc->bus_reset)
1758                 udc->bus_reset = 0;
1759
1760         /* Bus resetting is finished */
1761         if (!(fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET))
1762                 /* Get the speed */
1763                 udc->gadget.speed =
1764                         portscx_device_speed(fsl_readl(&dr_regs->portsc1));
1765
1766         /* Update USB state */
1767         if (!udc->resume_state)
1768                 udc->usb_state = USB_STATE_DEFAULT;
1769 }
1770
1771 /* Process suspend interrupt */
1772 static void suspend_irq(struct fsl_udc *udc)
1773 {
1774         udc->resume_state = udc->usb_state;
1775         udc->usb_state = USB_STATE_SUSPENDED;
1776
1777         /* report suspend to the driver, serial.c does not support this */
1778         if (udc->driver->suspend)
1779                 udc->driver->suspend(&udc->gadget);
1780 }
1781
1782 static void bus_resume(struct fsl_udc *udc)
1783 {
1784         udc->usb_state = udc->resume_state;
1785         udc->resume_state = 0;
1786
1787         /* report resume to the driver, serial.c does not support this */
1788         if (udc->driver->resume)
1789                 udc->driver->resume(&udc->gadget);
1790 }
1791
1792 /* Clear up all ep queues */
1793 static int reset_queues(struct fsl_udc *udc)
1794 {
1795         u8 pipe;
1796
1797         for (pipe = 0; pipe < udc->max_pipes; pipe++)
1798                 udc_reset_ep_queue(udc, pipe);
1799
1800         /* report disconnect; the driver is already quiesced */
1801         spin_unlock(&udc->lock);
1802         udc->driver->disconnect(&udc->gadget);
1803         spin_lock(&udc->lock);
1804
1805         return 0;
1806 }
1807
1808 /* Process reset interrupt */
1809 static void reset_irq(struct fsl_udc *udc)
1810 {
1811         u32 temp;
1812         unsigned long timeout;
1813
1814         /* Clear the device address */
1815         temp = fsl_readl(&dr_regs->deviceaddr);
1816         fsl_writel(temp & ~USB_DEVICE_ADDRESS_MASK, &dr_regs->deviceaddr);
1817
1818         udc->device_address = 0;
1819
1820         /* Clear usb state */
1821         udc->resume_state = 0;
1822         udc->ep0_dir = 0;
1823         udc->ep0_state = WAIT_FOR_SETUP;
1824         udc->remote_wakeup = 0; /* default to 0 on reset */
1825         udc->gadget.b_hnp_enable = 0;
1826         udc->gadget.a_hnp_support = 0;
1827         udc->gadget.a_alt_hnp_support = 0;
1828
1829         /* Clear all the setup token semaphores */
1830         temp = fsl_readl(&dr_regs->endptsetupstat);
1831         fsl_writel(temp, &dr_regs->endptsetupstat);
1832
1833         /* Clear all the endpoint complete status bits */
1834         temp = fsl_readl(&dr_regs->endptcomplete);
1835         fsl_writel(temp, &dr_regs->endptcomplete);
1836
1837         timeout = jiffies + 100;
1838         while (fsl_readl(&dr_regs->endpointprime)) {
1839                 /* Wait until all endptprime bits cleared */
1840                 if (time_after(jiffies, timeout)) {
1841                         ERR("Timeout for reset\n");
1842                         break;
1843                 }
1844                 cpu_relax();
1845         }
1846
1847         /* Write 1s to the flush register */
1848         fsl_writel(0xffffffff, &dr_regs->endptflush);
1849
1850         if (fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET) {
1851                 VDBG("Bus reset");
1852                 /* Bus is reseting */
1853                 udc->bus_reset = 1;
1854                 /* Reset all the queues, include XD, dTD, EP queue
1855                  * head and TR Queue */
1856                 reset_queues(udc);
1857                 udc->usb_state = USB_STATE_DEFAULT;
1858         } else {
1859                 VDBG("Controller reset");
1860                 /* initialize usb hw reg except for regs for EP, not
1861                  * touch usbintr reg */
1862                 dr_controller_setup(udc);
1863
1864                 /* Reset all internal used Queues */
1865                 reset_queues(udc);
1866
1867                 ep0_setup(udc);
1868
1869                 /* Enable DR IRQ reg, Set Run bit, change udc state */
1870                 dr_controller_run(udc);
1871                 udc->usb_state = USB_STATE_ATTACHED;
1872         }
1873 }
1874
1875 /*
1876  * USB device controller interrupt handler
1877  */
1878 static irqreturn_t fsl_udc_irq(int irq, void *_udc)
1879 {
1880         struct fsl_udc *udc = _udc;
1881         u32 irq_src;
1882         irqreturn_t status = IRQ_NONE;
1883         unsigned long flags;
1884
1885         /* Disable ISR for OTG host mode */
1886         if (udc->stopped)
1887                 return IRQ_NONE;
1888         spin_lock_irqsave(&udc->lock, flags);
1889         irq_src = fsl_readl(&dr_regs->usbsts) & fsl_readl(&dr_regs->usbintr);
1890         /* Clear notification bits */
1891         fsl_writel(irq_src, &dr_regs->usbsts);
1892
1893         /* VDBG("irq_src [0x%8x]", irq_src); */
1894
1895         /* Need to resume? */
1896         if (udc->usb_state == USB_STATE_SUSPENDED)
1897                 if ((fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_SUSPEND) == 0)
1898                         bus_resume(udc);
1899
1900         /* USB Interrupt */
1901         if (irq_src & USB_STS_INT) {
1902                 VDBG("Packet int");
1903                 /* Setup package, we only support ep0 as control ep */
1904                 if (fsl_readl(&dr_regs->endptsetupstat) & EP_SETUP_STATUS_EP0) {
1905                         tripwire_handler(udc, 0,
1906                                         (u8 *) (&udc->local_setup_buff));
1907                         setup_received_irq(udc, &udc->local_setup_buff);
1908                         status = IRQ_HANDLED;
1909                 }
1910
1911                 /* completion of dtd */
1912                 if (fsl_readl(&dr_regs->endptcomplete)) {
1913                         dtd_complete_irq(udc);
1914                         status = IRQ_HANDLED;
1915                 }
1916         }
1917
1918         /* SOF (for ISO transfer) */
1919         if (irq_src & USB_STS_SOF) {
1920                 status = IRQ_HANDLED;
1921         }
1922
1923         /* Port Change */
1924         if (irq_src & USB_STS_PORT_CHANGE) {
1925                 port_change_irq(udc);
1926                 status = IRQ_HANDLED;
1927         }
1928
1929         /* Reset Received */
1930         if (irq_src & USB_STS_RESET) {
1931                 VDBG("reset int");
1932                 reset_irq(udc);
1933                 status = IRQ_HANDLED;
1934         }
1935
1936         /* Sleep Enable (Suspend) */
1937         if (irq_src & USB_STS_SUSPEND) {
1938                 suspend_irq(udc);
1939                 status = IRQ_HANDLED;
1940         }
1941
1942         if (irq_src & (USB_STS_ERR | USB_STS_SYS_ERR)) {
1943                 VDBG("Error IRQ %x", irq_src);
1944         }
1945
1946         spin_unlock_irqrestore(&udc->lock, flags);
1947         return status;
1948 }
1949
1950 /*----------------------------------------------------------------*
1951  * Hook to gadget drivers
1952  * Called by initialization code of gadget drivers
1953 *----------------------------------------------------------------*/
1954 static int fsl_start(struct usb_gadget_driver *driver,
1955                 int (*bind)(struct usb_gadget *, struct usb_gadget_driver *))
1956 {
1957         int retval = -ENODEV;
1958         unsigned long flags = 0;
1959
1960         if (!udc_controller)
1961                 return -ENODEV;
1962
1963         if (!driver || driver->max_speed < USB_SPEED_FULL
1964                         || !bind || !driver->disconnect || !driver->setup)
1965                 return -EINVAL;
1966
1967         if (udc_controller->driver)
1968                 return -EBUSY;
1969
1970         /* lock is needed but whether should use this lock or another */
1971         spin_lock_irqsave(&udc_controller->lock, flags);
1972
1973         driver->driver.bus = NULL;
1974         /* hook up the driver */
1975         udc_controller->driver = driver;
1976         udc_controller->gadget.dev.driver = &driver->driver;
1977         spin_unlock_irqrestore(&udc_controller->lock, flags);
1978
1979         /* bind udc driver to gadget driver */
1980         retval = bind(&udc_controller->gadget, driver);
1981         if (retval) {
1982                 VDBG("bind to %s --> %d", driver->driver.name, retval);
1983                 udc_controller->gadget.dev.driver = NULL;
1984                 udc_controller->driver = NULL;
1985                 goto out;
1986         }
1987
1988         if (!IS_ERR_OR_NULL(udc_controller->transceiver)) {
1989                 /* Suspend the controller until OTG enable it */
1990                 udc_controller->stopped = 1;
1991                 printk(KERN_INFO "Suspend udc for OTG auto detect\n");
1992
1993                 /* connect to bus through transceiver */
1994                 if (!IS_ERR_OR_NULL(udc_controller->transceiver)) {
1995                         retval = otg_set_peripheral(
1996                                         udc_controller->transceiver->otg,
1997                                                     &udc_controller->gadget);
1998                         if (retval < 0) {
1999                                 ERR("can't bind to transceiver\n");
2000                                 driver->unbind(&udc_controller->gadget);
2001                                 udc_controller->gadget.dev.driver = 0;
2002                                 udc_controller->driver = 0;
2003                                 return retval;
2004                         }
2005                 }
2006         } else {
2007                 /* Enable DR IRQ reg and set USBCMD reg Run bit */
2008                 dr_controller_run(udc_controller);
2009                 udc_controller->usb_state = USB_STATE_ATTACHED;
2010                 udc_controller->ep0_state = WAIT_FOR_SETUP;
2011                 udc_controller->ep0_dir = 0;
2012         }
2013         printk(KERN_INFO "%s: bind to driver %s\n",
2014                         udc_controller->gadget.name, driver->driver.name);
2015
2016 out:
2017         if (retval)
2018                 printk(KERN_WARNING "gadget driver register failed %d\n",
2019                        retval);
2020         return retval;
2021 }
2022
2023 /* Disconnect from gadget driver */
2024 static int fsl_stop(struct usb_gadget_driver *driver)
2025 {
2026         struct fsl_ep *loop_ep;
2027         unsigned long flags;
2028
2029         if (!udc_controller)
2030                 return -ENODEV;
2031
2032         if (!driver || driver != udc_controller->driver || !driver->unbind)
2033                 return -EINVAL;
2034
2035         if (!IS_ERR_OR_NULL(udc_controller->transceiver))
2036                 otg_set_peripheral(udc_controller->transceiver->otg, NULL);
2037
2038         /* stop DR, disable intr */
2039         dr_controller_stop(udc_controller);
2040
2041         /* in fact, no needed */
2042         udc_controller->usb_state = USB_STATE_ATTACHED;
2043         udc_controller->ep0_state = WAIT_FOR_SETUP;
2044         udc_controller->ep0_dir = 0;
2045
2046         /* stand operation */
2047         spin_lock_irqsave(&udc_controller->lock, flags);
2048         udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2049         nuke(&udc_controller->eps[0], -ESHUTDOWN);
2050         list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
2051                         ep.ep_list)
2052                 nuke(loop_ep, -ESHUTDOWN);
2053         spin_unlock_irqrestore(&udc_controller->lock, flags);
2054
2055         /* report disconnect; the controller is already quiesced */
2056         driver->disconnect(&udc_controller->gadget);
2057
2058         /* unbind gadget and unhook driver. */
2059         driver->unbind(&udc_controller->gadget);
2060         udc_controller->gadget.dev.driver = NULL;
2061         udc_controller->driver = NULL;
2062
2063         printk(KERN_WARNING "unregistered gadget driver '%s'\n",
2064                driver->driver.name);
2065         return 0;
2066 }
2067
2068 /*-------------------------------------------------------------------------
2069                 PROC File System Support
2070 -------------------------------------------------------------------------*/
2071 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
2072
2073 #include <linux/seq_file.h>
2074
2075 static const char proc_filename[] = "driver/fsl_usb2_udc";
2076
2077 static int fsl_proc_read(char *page, char **start, off_t off, int count,
2078                 int *eof, void *_dev)
2079 {
2080         char *buf = page;
2081         char *next = buf;
2082         unsigned size = count;
2083         unsigned long flags;
2084         int t, i;
2085         u32 tmp_reg;
2086         struct fsl_ep *ep = NULL;
2087         struct fsl_req *req;
2088
2089         struct fsl_udc *udc = udc_controller;
2090         if (off != 0)
2091                 return 0;
2092
2093         spin_lock_irqsave(&udc->lock, flags);
2094
2095         /* ------basic driver information ---- */
2096         t = scnprintf(next, size,
2097                         DRIVER_DESC "\n"
2098                         "%s version: %s\n"
2099                         "Gadget driver: %s\n\n",
2100                         driver_name, DRIVER_VERSION,
2101                         udc->driver ? udc->driver->driver.name : "(none)");
2102         size -= t;
2103         next += t;
2104
2105         /* ------ DR Registers ----- */
2106         tmp_reg = fsl_readl(&dr_regs->usbcmd);
2107         t = scnprintf(next, size,
2108                         "USBCMD reg:\n"
2109                         "SetupTW: %d\n"
2110                         "Run/Stop: %s\n\n",
2111                         (tmp_reg & USB_CMD_SUTW) ? 1 : 0,
2112                         (tmp_reg & USB_CMD_RUN_STOP) ? "Run" : "Stop");
2113         size -= t;
2114         next += t;
2115
2116         tmp_reg = fsl_readl(&dr_regs->usbsts);
2117         t = scnprintf(next, size,
2118                         "USB Status Reg:\n"
2119                         "Dr Suspend: %d Reset Received: %d System Error: %s "
2120                         "USB Error Interrupt: %s\n\n",
2121                         (tmp_reg & USB_STS_SUSPEND) ? 1 : 0,
2122                         (tmp_reg & USB_STS_RESET) ? 1 : 0,
2123                         (tmp_reg & USB_STS_SYS_ERR) ? "Err" : "Normal",
2124                         (tmp_reg & USB_STS_ERR) ? "Err detected" : "No err");
2125         size -= t;
2126         next += t;
2127
2128         tmp_reg = fsl_readl(&dr_regs->usbintr);
2129         t = scnprintf(next, size,
2130                         "USB Interrupt Enable Reg:\n"
2131                         "Sleep Enable: %d SOF Received Enable: %d "
2132                         "Reset Enable: %d\n"
2133                         "System Error Enable: %d "
2134                         "Port Change Dectected Enable: %d\n"
2135                         "USB Error Intr Enable: %d USB Intr Enable: %d\n\n",
2136                         (tmp_reg & USB_INTR_DEVICE_SUSPEND) ? 1 : 0,
2137                         (tmp_reg & USB_INTR_SOF_EN) ? 1 : 0,
2138                         (tmp_reg & USB_INTR_RESET_EN) ? 1 : 0,
2139                         (tmp_reg & USB_INTR_SYS_ERR_EN) ? 1 : 0,
2140                         (tmp_reg & USB_INTR_PTC_DETECT_EN) ? 1 : 0,
2141                         (tmp_reg & USB_INTR_ERR_INT_EN) ? 1 : 0,
2142                         (tmp_reg & USB_INTR_INT_EN) ? 1 : 0);
2143         size -= t;
2144         next += t;
2145
2146         tmp_reg = fsl_readl(&dr_regs->frindex);
2147         t = scnprintf(next, size,
2148                         "USB Frame Index Reg: Frame Number is 0x%x\n\n",
2149                         (tmp_reg & USB_FRINDEX_MASKS));
2150         size -= t;
2151         next += t;
2152
2153         tmp_reg = fsl_readl(&dr_regs->deviceaddr);
2154         t = scnprintf(next, size,
2155                         "USB Device Address Reg: Device Addr is 0x%x\n\n",
2156                         (tmp_reg & USB_DEVICE_ADDRESS_MASK));
2157         size -= t;
2158         next += t;
2159
2160         tmp_reg = fsl_readl(&dr_regs->endpointlistaddr);
2161         t = scnprintf(next, size,
2162                         "USB Endpoint List Address Reg: "
2163                         "Device Addr is 0x%x\n\n",
2164                         (tmp_reg & USB_EP_LIST_ADDRESS_MASK));
2165         size -= t;
2166         next += t;
2167
2168         tmp_reg = fsl_readl(&dr_regs->portsc1);
2169         t = scnprintf(next, size,
2170                 "USB Port Status&Control Reg:\n"
2171                 "Port Transceiver Type : %s Port Speed: %s\n"
2172                 "PHY Low Power Suspend: %s Port Reset: %s "
2173                 "Port Suspend Mode: %s\n"
2174                 "Over-current Change: %s "
2175                 "Port Enable/Disable Change: %s\n"
2176                 "Port Enabled/Disabled: %s "
2177                 "Current Connect Status: %s\n\n", ( {
2178                         char *s;
2179                         switch (tmp_reg & PORTSCX_PTS_FSLS) {
2180                         case PORTSCX_PTS_UTMI:
2181                                 s = "UTMI"; break;
2182                         case PORTSCX_PTS_ULPI:
2183                                 s = "ULPI "; break;
2184                         case PORTSCX_PTS_FSLS:
2185                                 s = "FS/LS Serial"; break;
2186                         default:
2187                                 s = "None"; break;
2188                         }
2189                         s;} ),
2190                 usb_speed_string(portscx_device_speed(tmp_reg)),
2191                 (tmp_reg & PORTSCX_PHY_LOW_POWER_SPD) ?
2192                 "Normal PHY mode" : "Low power mode",
2193                 (tmp_reg & PORTSCX_PORT_RESET) ? "In Reset" :
2194                 "Not in Reset",
2195                 (tmp_reg & PORTSCX_PORT_SUSPEND) ? "In " : "Not in",
2196                 (tmp_reg & PORTSCX_OVER_CURRENT_CHG) ? "Dected" :
2197                 "No",
2198                 (tmp_reg & PORTSCX_PORT_EN_DIS_CHANGE) ? "Disable" :
2199                 "Not change",
2200                 (tmp_reg & PORTSCX_PORT_ENABLE) ? "Enable" :
2201                 "Not correct",
2202                 (tmp_reg & PORTSCX_CURRENT_CONNECT_STATUS) ?
2203                 "Attached" : "Not-Att");
2204         size -= t;
2205         next += t;
2206
2207         tmp_reg = fsl_readl(&dr_regs->usbmode);
2208         t = scnprintf(next, size,
2209                         "USB Mode Reg: Controller Mode is: %s\n\n", ( {
2210                                 char *s;
2211                                 switch (tmp_reg & USB_MODE_CTRL_MODE_HOST) {
2212                                 case USB_MODE_CTRL_MODE_IDLE:
2213                                         s = "Idle"; break;
2214                                 case USB_MODE_CTRL_MODE_DEVICE:
2215                                         s = "Device Controller"; break;
2216                                 case USB_MODE_CTRL_MODE_HOST:
2217                                         s = "Host Controller"; break;
2218                                 default:
2219                                         s = "None"; break;
2220                                 }
2221                                 s;
2222                         } ));
2223         size -= t;
2224         next += t;
2225
2226         tmp_reg = fsl_readl(&dr_regs->endptsetupstat);
2227         t = scnprintf(next, size,
2228                         "Endpoint Setup Status Reg: SETUP on ep 0x%x\n\n",
2229                         (tmp_reg & EP_SETUP_STATUS_MASK));
2230         size -= t;
2231         next += t;
2232
2233         for (i = 0; i < udc->max_ep / 2; i++) {
2234                 tmp_reg = fsl_readl(&dr_regs->endptctrl[i]);
2235                 t = scnprintf(next, size, "EP Ctrl Reg [0x%x]: = [0x%x]\n",
2236                                 i, tmp_reg);
2237                 size -= t;
2238                 next += t;
2239         }
2240         tmp_reg = fsl_readl(&dr_regs->endpointprime);
2241         t = scnprintf(next, size, "EP Prime Reg = [0x%x]\n\n", tmp_reg);
2242         size -= t;
2243         next += t;
2244
2245 #ifndef CONFIG_ARCH_MXC
2246         if (udc->pdata->have_sysif_regs) {
2247                 tmp_reg = usb_sys_regs->snoop1;
2248                 t = scnprintf(next, size, "Snoop1 Reg : = [0x%x]\n\n", tmp_reg);
2249                 size -= t;
2250                 next += t;
2251
2252                 tmp_reg = usb_sys_regs->control;
2253                 t = scnprintf(next, size, "General Control Reg : = [0x%x]\n\n",
2254                                 tmp_reg);
2255                 size -= t;
2256                 next += t;
2257         }
2258 #endif
2259
2260         /* ------fsl_udc, fsl_ep, fsl_request structure information ----- */
2261         ep = &udc->eps[0];
2262         t = scnprintf(next, size, "For %s Maxpkt is 0x%x index is 0x%x\n",
2263                         ep->ep.name, ep_maxpacket(ep), ep_index(ep));
2264         size -= t;
2265         next += t;
2266
2267         if (list_empty(&ep->queue)) {
2268                 t = scnprintf(next, size, "its req queue is empty\n\n");
2269                 size -= t;
2270                 next += t;
2271         } else {
2272                 list_for_each_entry(req, &ep->queue, queue) {
2273                         t = scnprintf(next, size,
2274                                 "req %p actual 0x%x length 0x%x buf %p\n",
2275                                 &req->req, req->req.actual,
2276                                 req->req.length, req->req.buf);
2277                         size -= t;
2278                         next += t;
2279                 }
2280         }
2281         /* other gadget->eplist ep */
2282         list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
2283                 if (ep->ep.desc) {
2284                         t = scnprintf(next, size,
2285                                         "\nFor %s Maxpkt is 0x%x "
2286                                         "index is 0x%x\n",
2287                                         ep->ep.name, ep_maxpacket(ep),
2288                                         ep_index(ep));
2289                         size -= t;
2290                         next += t;
2291
2292                         if (list_empty(&ep->queue)) {
2293                                 t = scnprintf(next, size,
2294                                                 "its req queue is empty\n\n");
2295                                 size -= t;
2296                                 next += t;
2297                         } else {
2298                                 list_for_each_entry(req, &ep->queue, queue) {
2299                                         t = scnprintf(next, size,
2300                                                 "req %p actual 0x%x length "
2301                                                 "0x%x  buf %p\n",
2302                                                 &req->req, req->req.actual,
2303                                                 req->req.length, req->req.buf);
2304                                         size -= t;
2305                                         next += t;
2306                                         }       /* end for each_entry of ep req */
2307                                 }       /* end for else */
2308                         }       /* end for if(ep->queue) */
2309                 }               /* end (ep->desc) */
2310
2311         spin_unlock_irqrestore(&udc->lock, flags);
2312
2313         *eof = 1;
2314         return count - size;
2315 }
2316
2317 #define create_proc_file()      create_proc_read_entry(proc_filename, \
2318                                 0, NULL, fsl_proc_read, NULL)
2319
2320 #define remove_proc_file()      remove_proc_entry(proc_filename, NULL)
2321
2322 #else                           /* !CONFIG_USB_GADGET_DEBUG_FILES */
2323
2324 #define create_proc_file()      do {} while (0)
2325 #define remove_proc_file()      do {} while (0)
2326
2327 #endif                          /* CONFIG_USB_GADGET_DEBUG_FILES */
2328
2329 /*-------------------------------------------------------------------------*/
2330
2331 /* Release udc structures */
2332 static void fsl_udc_release(struct device *dev)
2333 {
2334         complete(udc_controller->done);
2335         dma_free_coherent(dev->parent, udc_controller->ep_qh_size,
2336                         udc_controller->ep_qh, udc_controller->ep_qh_dma);
2337         kfree(udc_controller);
2338 }
2339
2340 /******************************************************************
2341         Internal structure setup functions
2342 *******************************************************************/
2343 /*------------------------------------------------------------------
2344  * init resource for globle controller
2345  * Return the udc handle on success or NULL on failure
2346  ------------------------------------------------------------------*/
2347 static int __init struct_udc_setup(struct fsl_udc *udc,
2348                 struct platform_device *pdev)
2349 {
2350         struct fsl_usb2_platform_data *pdata;
2351         size_t size;
2352
2353         pdata = pdev->dev.platform_data;
2354         udc->phy_mode = pdata->phy_mode;
2355
2356         udc->eps = kzalloc(sizeof(struct fsl_ep) * udc->max_ep, GFP_KERNEL);
2357         if (!udc->eps) {
2358                 ERR("malloc fsl_ep failed\n");
2359                 return -1;
2360         }
2361
2362         /* initialized QHs, take care of alignment */
2363         size = udc->max_ep * sizeof(struct ep_queue_head);
2364         if (size < QH_ALIGNMENT)
2365                 size = QH_ALIGNMENT;
2366         else if ((size % QH_ALIGNMENT) != 0) {
2367                 size += QH_ALIGNMENT + 1;
2368                 size &= ~(QH_ALIGNMENT - 1);
2369         }
2370         udc->ep_qh = dma_alloc_coherent(&pdev->dev, size,
2371                                         &udc->ep_qh_dma, GFP_KERNEL);
2372         if (!udc->ep_qh) {
2373                 ERR("malloc QHs for udc failed\n");
2374                 kfree(udc->eps);
2375                 return -1;
2376         }
2377
2378         udc->ep_qh_size = size;
2379
2380         /* Initialize ep0 status request structure */
2381         /* FIXME: fsl_alloc_request() ignores ep argument */
2382         udc->status_req = container_of(fsl_alloc_request(NULL, GFP_KERNEL),
2383                         struct fsl_req, req);
2384         /* allocate a small amount of memory to get valid address */
2385         udc->status_req->req.buf = kmalloc(8, GFP_KERNEL);
2386
2387         udc->resume_state = USB_STATE_NOTATTACHED;
2388         udc->usb_state = USB_STATE_POWERED;
2389         udc->ep0_dir = 0;
2390         udc->remote_wakeup = 0; /* default to 0 on reset */
2391
2392         return 0;
2393 }
2394
2395 /*----------------------------------------------------------------
2396  * Setup the fsl_ep struct for eps
2397  * Link fsl_ep->ep to gadget->ep_list
2398  * ep0out is not used so do nothing here
2399  * ep0in should be taken care
2400  *--------------------------------------------------------------*/
2401 static int __init struct_ep_setup(struct fsl_udc *udc, unsigned char index,
2402                 char *name, int link)
2403 {
2404         struct fsl_ep *ep = &udc->eps[index];
2405
2406         ep->udc = udc;
2407         strcpy(ep->name, name);
2408         ep->ep.name = ep->name;
2409
2410         ep->ep.ops = &fsl_ep_ops;
2411         ep->stopped = 0;
2412
2413         /* for ep0: maxP defined in desc
2414          * for other eps, maxP is set by epautoconfig() called by gadget layer
2415          */
2416         ep->ep.maxpacket = (unsigned short) ~0;
2417
2418         /* the queue lists any req for this ep */
2419         INIT_LIST_HEAD(&ep->queue);
2420
2421         /* gagdet.ep_list used for ep_autoconfig so no ep0 */
2422         if (link)
2423                 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2424         ep->gadget = &udc->gadget;
2425         ep->qh = &udc->ep_qh[index];
2426
2427         return 0;
2428 }
2429
2430 /* Driver probe function
2431  * all intialization operations implemented here except enabling usb_intr reg
2432  * board setup should have been done in the platform code
2433  */
2434 static int __init fsl_udc_probe(struct platform_device *pdev)
2435 {
2436         struct fsl_usb2_platform_data *pdata;
2437         struct resource *res;
2438         int ret = -ENODEV;
2439         unsigned int i;
2440         u32 dccparams;
2441
2442         udc_controller = kzalloc(sizeof(struct fsl_udc), GFP_KERNEL);
2443         if (udc_controller == NULL) {
2444                 ERR("malloc udc failed\n");
2445                 return -ENOMEM;
2446         }
2447
2448         pdata = pdev->dev.platform_data;
2449         udc_controller->pdata = pdata;
2450         spin_lock_init(&udc_controller->lock);
2451         udc_controller->stopped = 1;
2452
2453 #ifdef CONFIG_USB_OTG
2454         if (pdata->operating_mode == FSL_USB2_DR_OTG) {
2455                 udc_controller->transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
2456                 if (IS_ERR_OR_NULL(udc_controller->transceiver)) {
2457                         ERR("Can't find OTG driver!\n");
2458                         ret = -ENODEV;
2459                         goto err_kfree;
2460                 }
2461         }
2462 #endif
2463
2464         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2465         if (!res) {
2466                 ret = -ENXIO;
2467                 goto err_kfree;
2468         }
2469
2470         if (pdata->operating_mode == FSL_USB2_DR_DEVICE) {
2471                 if (!request_mem_region(res->start, resource_size(res),
2472                                         driver_name)) {
2473                         ERR("request mem region for %s failed\n", pdev->name);
2474                         ret = -EBUSY;
2475                         goto err_kfree;
2476                 }
2477         }
2478
2479         dr_regs = ioremap(res->start, resource_size(res));
2480         if (!dr_regs) {
2481                 ret = -ENOMEM;
2482                 goto err_release_mem_region;
2483         }
2484
2485         pdata->regs = (void *)dr_regs;
2486
2487         /*
2488          * do platform specific init: check the clock, grab/config pins, etc.
2489          */
2490         if (pdata->init && pdata->init(pdev)) {
2491                 ret = -ENODEV;
2492                 goto err_iounmap_noclk;
2493         }
2494
2495         /* Set accessors only after pdata->init() ! */
2496         fsl_set_accessors(pdata);
2497
2498 #ifndef CONFIG_ARCH_MXC
2499         if (pdata->have_sysif_regs)
2500                 usb_sys_regs = (void *)dr_regs + USB_DR_SYS_OFFSET;
2501 #endif
2502
2503         /* Initialize USB clocks */
2504         ret = fsl_udc_clk_init(pdev);
2505         if (ret < 0)
2506                 goto err_iounmap_noclk;
2507
2508         /* Read Device Controller Capability Parameters register */
2509         dccparams = fsl_readl(&dr_regs->dccparams);
2510         if (!(dccparams & DCCPARAMS_DC)) {
2511                 ERR("This SOC doesn't support device role\n");
2512                 ret = -ENODEV;
2513                 goto err_iounmap;
2514         }
2515         /* Get max device endpoints */
2516         /* DEN is bidirectional ep number, max_ep doubles the number */
2517         udc_controller->max_ep = (dccparams & DCCPARAMS_DEN_MASK) * 2;
2518
2519         udc_controller->irq = platform_get_irq(pdev, 0);
2520         if (!udc_controller->irq) {
2521                 ret = -ENODEV;
2522                 goto err_iounmap;
2523         }
2524
2525         ret = request_irq(udc_controller->irq, fsl_udc_irq, IRQF_SHARED,
2526                         driver_name, udc_controller);
2527         if (ret != 0) {
2528                 ERR("cannot request irq %d err %d\n",
2529                                 udc_controller->irq, ret);
2530                 goto err_iounmap;
2531         }
2532
2533         /* Initialize the udc structure including QH member and other member */
2534         if (struct_udc_setup(udc_controller, pdev)) {
2535                 ERR("Can't initialize udc data structure\n");
2536                 ret = -ENOMEM;
2537                 goto err_free_irq;
2538         }
2539
2540         if (IS_ERR_OR_NULL(udc_controller->transceiver)) {
2541                 /* initialize usb hw reg except for regs for EP,
2542                  * leave usbintr reg untouched */
2543                 dr_controller_setup(udc_controller);
2544         }
2545
2546         ret = fsl_udc_clk_finalize(pdev);
2547         if (ret)
2548                 goto err_free_irq;
2549
2550         /* Setup gadget structure */
2551         udc_controller->gadget.ops = &fsl_gadget_ops;
2552         udc_controller->gadget.max_speed = USB_SPEED_HIGH;
2553         udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
2554         INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
2555         udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2556         udc_controller->gadget.name = driver_name;
2557
2558         /* Setup gadget.dev and register with kernel */
2559         dev_set_name(&udc_controller->gadget.dev, "gadget");
2560         udc_controller->gadget.dev.release = fsl_udc_release;
2561         udc_controller->gadget.dev.parent = &pdev->dev;
2562         udc_controller->gadget.dev.of_node = pdev->dev.of_node;
2563         ret = device_register(&udc_controller->gadget.dev);
2564         if (ret < 0)
2565                 goto err_free_irq;
2566
2567         if (!IS_ERR_OR_NULL(udc_controller->transceiver))
2568                 udc_controller->gadget.is_otg = 1;
2569
2570         /* setup QH and epctrl for ep0 */
2571         ep0_setup(udc_controller);
2572
2573         /* setup udc->eps[] for ep0 */
2574         struct_ep_setup(udc_controller, 0, "ep0", 0);
2575         /* for ep0: the desc defined here;
2576          * for other eps, gadget layer called ep_enable with defined desc
2577          */
2578         udc_controller->eps[0].ep.desc = &fsl_ep0_desc;
2579         udc_controller->eps[0].ep.maxpacket = USB_MAX_CTRL_PAYLOAD;
2580
2581         /* setup the udc->eps[] for non-control endpoints and link
2582          * to gadget.ep_list */
2583         for (i = 1; i < (int)(udc_controller->max_ep / 2); i++) {
2584                 char name[14];
2585
2586                 sprintf(name, "ep%dout", i);
2587                 struct_ep_setup(udc_controller, i * 2, name, 1);
2588                 sprintf(name, "ep%din", i);
2589                 struct_ep_setup(udc_controller, i * 2 + 1, name, 1);
2590         }
2591
2592         /* use dma_pool for TD management */
2593         udc_controller->td_pool = dma_pool_create("udc_td", &pdev->dev,
2594                         sizeof(struct ep_td_struct),
2595                         DTD_ALIGNMENT, UDC_DMA_BOUNDARY);
2596         if (udc_controller->td_pool == NULL) {
2597                 ret = -ENOMEM;
2598                 goto err_unregister;
2599         }
2600
2601         ret = usb_add_gadget_udc(&pdev->dev, &udc_controller->gadget);
2602         if (ret)
2603                 goto err_del_udc;
2604
2605         create_proc_file();
2606         return 0;
2607
2608 err_del_udc:
2609         dma_pool_destroy(udc_controller->td_pool);
2610 err_unregister:
2611         device_unregister(&udc_controller->gadget.dev);
2612 err_free_irq:
2613         free_irq(udc_controller->irq, udc_controller);
2614 err_iounmap:
2615         if (pdata->exit)
2616                 pdata->exit(pdev);
2617         fsl_udc_clk_release();
2618 err_iounmap_noclk:
2619         iounmap(dr_regs);
2620 err_release_mem_region:
2621         if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
2622                 release_mem_region(res->start, resource_size(res));
2623 err_kfree:
2624         kfree(udc_controller);
2625         udc_controller = NULL;
2626         return ret;
2627 }
2628
2629 /* Driver removal function
2630  * Free resources and finish pending transactions
2631  */
2632 static int __exit fsl_udc_remove(struct platform_device *pdev)
2633 {
2634         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2635         struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
2636
2637         DECLARE_COMPLETION(done);
2638
2639         if (!udc_controller)
2640                 return -ENODEV;
2641
2642         usb_del_gadget_udc(&udc_controller->gadget);
2643         udc_controller->done = &done;
2644
2645         fsl_udc_clk_release();
2646
2647         /* DR has been stopped in usb_gadget_unregister_driver() */
2648         remove_proc_file();
2649
2650         /* Free allocated memory */
2651         kfree(udc_controller->status_req->req.buf);
2652         kfree(udc_controller->status_req);
2653         kfree(udc_controller->eps);
2654
2655         dma_pool_destroy(udc_controller->td_pool);
2656         free_irq(udc_controller->irq, udc_controller);
2657         iounmap(dr_regs);
2658         if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
2659                 release_mem_region(res->start, resource_size(res));
2660
2661         device_unregister(&udc_controller->gadget.dev);
2662         /* free udc --wait for the release() finished */
2663         wait_for_completion(&done);
2664
2665         /*
2666          * do platform specific un-initialization:
2667          * release iomux pins, etc.
2668          */
2669         if (pdata->exit)
2670                 pdata->exit(pdev);
2671
2672         return 0;
2673 }
2674
2675 /*-----------------------------------------------------------------
2676  * Modify Power management attributes
2677  * Used by OTG statemachine to disable gadget temporarily
2678  -----------------------------------------------------------------*/
2679 static int fsl_udc_suspend(struct platform_device *pdev, pm_message_t state)
2680 {
2681         dr_controller_stop(udc_controller);
2682         return 0;
2683 }
2684
2685 /*-----------------------------------------------------------------
2686  * Invoked on USB resume. May be called in_interrupt.
2687  * Here we start the DR controller and enable the irq
2688  *-----------------------------------------------------------------*/
2689 static int fsl_udc_resume(struct platform_device *pdev)
2690 {
2691         /* Enable DR irq reg and set controller Run */
2692         if (udc_controller->stopped) {
2693                 dr_controller_setup(udc_controller);
2694                 dr_controller_run(udc_controller);
2695         }
2696         udc_controller->usb_state = USB_STATE_ATTACHED;
2697         udc_controller->ep0_state = WAIT_FOR_SETUP;
2698         udc_controller->ep0_dir = 0;
2699         return 0;
2700 }
2701
2702 static int fsl_udc_otg_suspend(struct device *dev, pm_message_t state)
2703 {
2704         struct fsl_udc *udc = udc_controller;
2705         u32 mode, usbcmd;
2706
2707         mode = fsl_readl(&dr_regs->usbmode) & USB_MODE_CTRL_MODE_MASK;
2708
2709         pr_debug("%s(): mode 0x%x stopped %d\n", __func__, mode, udc->stopped);
2710
2711         /*
2712          * If the controller is already stopped, then this must be a
2713          * PM suspend.  Remember this fact, so that we will leave the
2714          * controller stopped at PM resume time.
2715          */
2716         if (udc->stopped) {
2717                 pr_debug("gadget already stopped, leaving early\n");
2718                 udc->already_stopped = 1;
2719                 return 0;
2720         }
2721
2722         if (mode != USB_MODE_CTRL_MODE_DEVICE) {
2723                 pr_debug("gadget not in device mode, leaving early\n");
2724                 return 0;
2725         }
2726
2727         /* stop the controller */
2728         usbcmd = fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP;
2729         fsl_writel(usbcmd, &dr_regs->usbcmd);
2730
2731         udc->stopped = 1;
2732
2733         pr_info("USB Gadget suspended\n");
2734
2735         return 0;
2736 }
2737
2738 static int fsl_udc_otg_resume(struct device *dev)
2739 {
2740         pr_debug("%s(): stopped %d  already_stopped %d\n", __func__,
2741                  udc_controller->stopped, udc_controller->already_stopped);
2742
2743         /*
2744          * If the controller was stopped at suspend time, then
2745          * don't resume it now.
2746          */
2747         if (udc_controller->already_stopped) {
2748                 udc_controller->already_stopped = 0;
2749                 pr_debug("gadget was already stopped, leaving early\n");
2750                 return 0;
2751         }
2752
2753         pr_info("USB Gadget resume\n");
2754
2755         return fsl_udc_resume(NULL);
2756 }
2757 /*-------------------------------------------------------------------------
2758         Register entry point for the peripheral controller driver
2759 --------------------------------------------------------------------------*/
2760 static const struct platform_device_id fsl_udc_devtype[] = {
2761         {
2762                 .name = "imx-udc-mx27",
2763         }, {
2764                 .name = "imx-udc-mx51",
2765         }, {
2766                 /* sentinel */
2767         }
2768 };
2769 MODULE_DEVICE_TABLE(platform, fsl_udc_devtype);
2770 static struct platform_driver udc_driver = {
2771         .remove         = __exit_p(fsl_udc_remove),
2772         /* Just for FSL i.mx SoC currently */
2773         .id_table       = fsl_udc_devtype,
2774         /* these suspend and resume are not usb suspend and resume */
2775         .suspend        = fsl_udc_suspend,
2776         .resume         = fsl_udc_resume,
2777         .driver         = {
2778                         .name = (char *)driver_name,
2779                         .owner = THIS_MODULE,
2780                         /* udc suspend/resume called from OTG driver */
2781                         .suspend = fsl_udc_otg_suspend,
2782                         .resume  = fsl_udc_otg_resume,
2783         },
2784 };
2785
2786 static int __init udc_init(void)
2787 {
2788         printk(KERN_INFO "%s (%s)\n", driver_desc, DRIVER_VERSION);
2789         return platform_driver_probe(&udc_driver, fsl_udc_probe);
2790 }
2791
2792 module_init(udc_init);
2793
2794 static void __exit udc_exit(void)
2795 {
2796         platform_driver_unregister(&udc_driver);
2797         printk(KERN_WARNING "%s unregistered\n", driver_desc);
2798 }
2799
2800 module_exit(udc_exit);
2801
2802 MODULE_DESCRIPTION(DRIVER_DESC);
2803 MODULE_AUTHOR(DRIVER_AUTHOR);
2804 MODULE_LICENSE("GPL");
2805 MODULE_ALIAS("platform:fsl-usb2-udc");