drivers/usb/gadget/udc/atmel_usba_udc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Driver for the Atmel USBA high speed USB device controller
   4  *
   5  * Copyright (C) 2005-2007 Atmel Corporation
   6  */
   7 #include <linux/clk.h>
   8 #include <linux/clk/at91_pmc.h>
   9 #include <linux/module.h>
  10 #include <linux/init.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/io.h>
  13 #include <linux/slab.h>
  14 #include <linux/device.h>
  15 #include <linux/dma-mapping.h>
  16 #include <linux/list.h>
  17 #include <linux/mfd/syscon.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/regmap.h>
  20 #include <linux/ctype.h>
  21 #include <linux/usb.h>
  22 #include <linux/usb/ch9.h>
  23 #include <linux/usb/gadget.h>
  24 #include <linux/delay.h>
  25 #include <linux/of.h>
  26 #include <linux/irq.h>
  27 #include <linux/gpio/consumer.h>
  28
  29 #include "atmel_usba_udc.h"
  30 #define USBA_VBUS_IRQFLAGS (IRQF_ONESHOT \
  31                            | IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING)
  32
  33 #ifdef CONFIG_USB_GADGET_DEBUG_FS
  34 #include <linux/debugfs.h>
  35 #include <linux/uaccess.h>
  36
  37 static int queue_dbg_open(struct inode *inode, struct file *file)
  38 {
  39         struct usba_ep *ep = inode->i_private;
  40         struct usba_request *req, *req_copy;
  41         struct list_head *queue_data;
  42
  43         queue_data = kmalloc(sizeof(*queue_data), GFP_KERNEL);
  44         if (!queue_data)
  45                 return -ENOMEM;
  46         INIT_LIST_HEAD(queue_data);
  47
  48         spin_lock_irq(&ep->udc->lock);
  49         list_for_each_entry(req, &ep->queue, queue) {
  50                 req_copy = kmemdup(req, sizeof(*req_copy), GFP_ATOMIC);
  51                 if (!req_copy)
  52                         goto fail;
  53                 list_add_tail(&req_copy->queue, queue_data);
  54         }
  55         spin_unlock_irq(&ep->udc->lock);
  56
  57         file->private_data = queue_data;
  58         return 0;
  59
  60 fail:
  61         spin_unlock_irq(&ep->udc->lock);
  62         list_for_each_entry_safe(req, req_copy, queue_data, queue) {
  63                 list_del(&req->queue);
  64                 kfree(req);
  65         }
  66         kfree(queue_data);
  67         return -ENOMEM;
  68 }
  69
  70 /*
  71  * bbbbbbbb llllllll IZS sssss nnnn FDL\n\0
  72  *
  73  * b: buffer address
  74  * l: buffer length
  75  * I/i: interrupt/no interrupt
  76  * Z/z: zero/no zero
  77  * S/s: short ok/short not ok
  78  * s: status
  79  * n: nr_packets
  80  * F/f: submitted/not submitted to FIFO
  81  * D/d: using/not using DMA
  82  * L/l: last transaction/not last transaction
  83  */
  84 static ssize_t queue_dbg_read(struct file *file, char __user *buf,
  85                 size_t nbytes, loff_t *ppos)
  86 {
  87         struct list_head *queue = file->private_data;
  88         struct usba_request *req, *tmp_req;
  89         size_t len, remaining, actual = 0;
  90         char tmpbuf[38];
  91
  92         if (!access_ok(buf, nbytes))
  93                 return -EFAULT;
  94
  95         inode_lock(file_inode(file));
  96         list_for_each_entry_safe(req, tmp_req, queue, queue) {
  97                 len = scnprintf(tmpbuf, sizeof(tmpbuf),
  98                                 "%8p %08x %c%c%c %5d %c%c%c\n",
  99                                 req->req.buf, req->req.length,
 100                                 req->req.no_interrupt ? 'i' : 'I',
 101                                 req->req.zero ? 'Z' : 'z',
 102                                 req->req.short_not_ok ? 's' : 'S',
 103                                 req->req.status,
 104                                 req->submitted ? 'F' : 'f',
 105                                 req->using_dma ? 'D' : 'd',
 106                                 req->last_transaction ? 'L' : 'l');
 107                 if (len > nbytes)
 108                         break;
 109
 110                 list_del(&req->queue);
 111                 kfree(req);
 112
 113                 remaining = __copy_to_user(buf, tmpbuf, len);
 114                 actual += len - remaining;
 115                 if (remaining)
 116                         break;
 117
 118                 nbytes -= len;
 119                 buf += len;
 120         }
 121         inode_unlock(file_inode(file));
 122
 123         return actual;
 124 }
 125
 126 static int queue_dbg_release(struct inode *inode, struct file *file)
 127 {
 128         struct list_head *queue_data = file->private_data;
 129         struct usba_request *req, *tmp_req;
 130
 131         list_for_each_entry_safe(req, tmp_req, queue_data, queue) {
 132                 list_del(&req->queue);
 133                 kfree(req);
 134         }
 135         kfree(queue_data);
 136         return 0;
 137 }
 138
 139 static int regs_dbg_open(struct inode *inode, struct file *file)
 140 {
 141         struct usba_udc *udc;
 142         unsigned int i;
 143         u32 *data;
 144         int ret = -ENOMEM;
 145
 146         inode_lock(inode);
 147         udc = inode->i_private;
 148         data = kmalloc(inode->i_size, GFP_KERNEL);
 149         if (!data)
 150                 goto out;
 151
 152         spin_lock_irq(&udc->lock);
 153         for (i = 0; i < inode->i_size / 4; i++)
 154                 data[i] = readl_relaxed(udc->regs + i * 4);
 155         spin_unlock_irq(&udc->lock);
 156
 157         file->private_data = data;
 158         ret = 0;
 159
 160 out:
 161         inode_unlock(inode);
 162
 163         return ret;
 164 }
 165
 166 static ssize_t regs_dbg_read(struct file *file, char __user *buf,
 167                 size_t nbytes, loff_t *ppos)
 168 {
 169         struct inode *inode = file_inode(file);
 170         int ret;
 171
 172         inode_lock(inode);
 173         ret = simple_read_from_buffer(buf, nbytes, ppos,
 174                         file->private_data,
 175                         file_inode(file)->i_size);
 176         inode_unlock(inode);
 177
 178         return ret;
 179 }
 180
 181 static int regs_dbg_release(struct inode *inode, struct file *file)
 182 {
 183         kfree(file->private_data);
 184         return 0;
 185 }
 186
 187 static const struct file_operations queue_dbg_fops = {
 188         .owner          = THIS_MODULE,
 189         .open           = queue_dbg_open,
 190         .llseek         = no_llseek,
 191         .read           = queue_dbg_read,
 192         .release        = queue_dbg_release,
 193 };
 194
 195 static const struct file_operations regs_dbg_fops = {
 196         .owner          = THIS_MODULE,
 197         .open           = regs_dbg_open,
 198         .llseek         = generic_file_llseek,
 199         .read           = regs_dbg_read,
 200         .release        = regs_dbg_release,
 201 };
 202
 203 static void usba_ep_init_debugfs(struct usba_udc *udc,
 204                 struct usba_ep *ep)
 205 {
 206         struct dentry *ep_root;
 207
 208         ep_root = debugfs_create_dir(ep->ep.name, udc->debugfs_root);
 209         ep->debugfs_dir = ep_root;
 210
 211         debugfs_create_file("queue", 0400, ep_root, ep, &queue_dbg_fops);
 212         if (ep->can_dma)
 213                 debugfs_create_u32("dma_status", 0400, ep_root,
 214                                    &ep->last_dma_status);
 215         if (ep_is_control(ep))
 216                 debugfs_create_u32("state", 0400, ep_root, &ep->state);
 217 }
 218
 219 static void usba_ep_cleanup_debugfs(struct usba_ep *ep)
 220 {
 221         debugfs_remove_recursive(ep->debugfs_dir);
 222 }
 223
 224 static void usba_init_debugfs(struct usba_udc *udc)
 225 {
 226         struct dentry *root;
 227         struct resource *regs_resource;
 228
 229         root = debugfs_create_dir(udc->gadget.name, usb_debug_root);
 230         udc->debugfs_root = root;
 231
 232         regs_resource = platform_get_resource(udc->pdev, IORESOURCE_MEM,
 233                                 CTRL_IOMEM_ID);
 234
 235         if (regs_resource) {
 236                 debugfs_create_file_size("regs", 0400, root, udc,
 237                                          &regs_dbg_fops,
 238                                          resource_size(regs_resource));
 239         }
 240
 241         usba_ep_init_debugfs(udc, to_usba_ep(udc->gadget.ep0));
 242 }
 243
 244 static void usba_cleanup_debugfs(struct usba_udc *udc)
 245 {
 246         usba_ep_cleanup_debugfs(to_usba_ep(udc->gadget.ep0));
 247         debugfs_remove_recursive(udc->debugfs_root);
 248 }
 249 #else
 250 static inline void usba_ep_init_debugfs(struct usba_udc *udc,
 251                                          struct usba_ep *ep)
 252 {
 253
 254 }
 255
 256 static inline void usba_ep_cleanup_debugfs(struct usba_ep *ep)
 257 {
 258
 259 }
 260
 261 static inline void usba_init_debugfs(struct usba_udc *udc)
 262 {
 263
 264 }
 265
 266 static inline void usba_cleanup_debugfs(struct usba_udc *udc)
 267 {
 268
 269 }
 270 #endif
 271
 272 static ushort fifo_mode;
 273
 274 module_param(fifo_mode, ushort, 0x0);
 275 MODULE_PARM_DESC(fifo_mode, "Endpoint configuration mode");
 276
 277 /* mode 0 - uses autoconfig */
 278
 279 /* mode 1 - fits in 8KB, generic max fifo configuration */
 280 static struct usba_fifo_cfg mode_1_cfg[] = {
 281 { .hw_ep_num = 0, .fifo_size = 64,      .nr_banks = 1, },
 282 { .hw_ep_num = 1, .fifo_size = 1024,    .nr_banks = 2, },
 283 { .hw_ep_num = 2, .fifo_size = 1024,    .nr_banks = 1, },
 284 { .hw_ep_num = 3, .fifo_size = 1024,    .nr_banks = 1, },
 285 { .hw_ep_num = 4, .fifo_size = 1024,    .nr_banks = 1, },
 286 { .hw_ep_num = 5, .fifo_size = 1024,    .nr_banks = 1, },
 287 { .hw_ep_num = 6, .fifo_size = 1024,    .nr_banks = 1, },
 288 };
 289
 290 /* mode 2 - fits in 8KB, performance max fifo configuration */
 291 static struct usba_fifo_cfg mode_2_cfg[] = {
 292 { .hw_ep_num = 0, .fifo_size = 64,      .nr_banks = 1, },
 293 { .hw_ep_num = 1, .fifo_size = 1024,    .nr_banks = 3, },
 294 { .hw_ep_num = 2, .fifo_size = 1024,    .nr_banks = 2, },
 295 { .hw_ep_num = 3, .fifo_size = 1024,    .nr_banks = 2, },
 296 };
 297
 298 /* mode 3 - fits in 8KB, mixed fifo configuration */
 299 static struct usba_fifo_cfg mode_3_cfg[] = {
 300 { .hw_ep_num = 0, .fifo_size = 64,      .nr_banks = 1, },
 301 { .hw_ep_num = 1, .fifo_size = 1024,    .nr_banks = 2, },
 302 { .hw_ep_num = 2, .fifo_size = 512,     .nr_banks = 2, },
 303 { .hw_ep_num = 3, .fifo_size = 512,     .nr_banks = 2, },
 304 { .hw_ep_num = 4, .fifo_size = 512,     .nr_banks = 2, },
 305 { .hw_ep_num = 5, .fifo_size = 512,     .nr_banks = 2, },
 306 { .hw_ep_num = 6, .fifo_size = 512,     .nr_banks = 2, },
 307 };
 308
 309 /* mode 4 - fits in 8KB, custom fifo configuration */
 310 static struct usba_fifo_cfg mode_4_cfg[] = {
 311 { .hw_ep_num = 0, .fifo_size = 64,      .nr_banks = 1, },
 312 { .hw_ep_num = 1, .fifo_size = 512,     .nr_banks = 2, },
 313 { .hw_ep_num = 2, .fifo_size = 512,     .nr_banks = 2, },
 314 { .hw_ep_num = 3, .fifo_size = 8,       .nr_banks = 2, },
 315 { .hw_ep_num = 4, .fifo_size = 512,     .nr_banks = 2, },
 316 { .hw_ep_num = 5, .fifo_size = 512,     .nr_banks = 2, },
 317 { .hw_ep_num = 6, .fifo_size = 16,      .nr_banks = 2, },
 318 { .hw_ep_num = 7, .fifo_size = 8,       .nr_banks = 2, },
 319 { .hw_ep_num = 8, .fifo_size = 8,       .nr_banks = 2, },
 320 };
 321 /* Add additional configurations here */
 322
 323 static int usba_config_fifo_table(struct usba_udc *udc)
 324 {
 325         int n;
 326
 327         switch (fifo_mode) {
 328         default:
 329                 fifo_mode = 0;
 330                 fallthrough;
 331         case 0:
 332                 udc->fifo_cfg = NULL;
 333                 n = 0;
 334                 break;
 335         case 1:
 336                 udc->fifo_cfg = mode_1_cfg;
 337                 n = ARRAY_SIZE(mode_1_cfg);
 338                 break;
 339         case 2:
 340                 udc->fifo_cfg = mode_2_cfg;
 341                 n = ARRAY_SIZE(mode_2_cfg);
 342                 break;
 343         case 3:
 344                 udc->fifo_cfg = mode_3_cfg;
 345                 n = ARRAY_SIZE(mode_3_cfg);
 346                 break;
 347         case 4:
 348                 udc->fifo_cfg = mode_4_cfg;
 349                 n = ARRAY_SIZE(mode_4_cfg);
 350                 break;
 351         }
 352         DBG(DBG_HW, "Setup fifo_mode %d\n", fifo_mode);
 353
 354         return n;
 355 }
 356
 357 static inline u32 usba_int_enb_get(struct usba_udc *udc)
 358 {
 359         return udc->int_enb_cache;
 360 }
 361
 362 static inline void usba_int_enb_set(struct usba_udc *udc, u32 mask)
 363 {
 364         u32 val;
 365
 366         val = udc->int_enb_cache | mask;
 367         usba_writel(udc, INT_ENB, val);
 368         udc->int_enb_cache = val;
 369 }
 370
 371 static inline void usba_int_enb_clear(struct usba_udc *udc, u32 mask)
 372 {
 373         u32 val;
 374
 375         val = udc->int_enb_cache & ~mask;
 376         usba_writel(udc, INT_ENB, val);
 377         udc->int_enb_cache = val;
 378 }
 379
 380 static int vbus_is_present(struct usba_udc *udc)
 381 {
 382         if (udc->vbus_pin)
 383                 return gpiod_get_value(udc->vbus_pin);
 384
 385         /* No Vbus detection: Assume always present */
 386         return 1;
 387 }
 388
 389 static void toggle_bias(struct usba_udc *udc, int is_on)
 390 {
 391         if (udc->errata && udc->errata->toggle_bias)
 392                 udc->errata->toggle_bias(udc, is_on);
 393 }
 394
 395 static void generate_bias_pulse(struct usba_udc *udc)
 396 {
 397         if (!udc->bias_pulse_needed)
 398                 return;
 399
 400         if (udc->errata && udc->errata->pulse_bias)
 401                 udc->errata->pulse_bias(udc);
 402
 403         udc->bias_pulse_needed = false;
 404 }
 405
 406 static void next_fifo_transaction(struct usba_ep *ep, struct usba_request *req)
 407 {
 408         unsigned int transaction_len;
 409
 410         transaction_len = req->req.length - req->req.actual;
 411         req->last_transaction = 1;
 412         if (transaction_len > ep->ep.maxpacket) {
 413                 transaction_len = ep->ep.maxpacket;
 414                 req->last_transaction = 0;
 415         } else if (transaction_len == ep->ep.maxpacket && req->req.zero)
 416                 req->last_transaction = 0;
 417
 418         DBG(DBG_QUEUE, "%s: submit_transaction, req %p (length %d)%s\n",
 419                 ep->ep.name, req, transaction_len,
 420                 req->last_transaction ? ", done" : "");
 421
 422         memcpy_toio(ep->fifo, req->req.buf + req->req.actual, transaction_len);
 423         usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
 424         req->req.actual += transaction_len;
 425 }
 426
 427 static void submit_request(struct usba_ep *ep, struct usba_request *req)
 428 {
 429         DBG(DBG_QUEUE, "%s: submit_request: req %p (length %d)\n",
 430                 ep->ep.name, req, req->req.length);
 431
 432         req->req.actual = 0;
 433         req->submitted = 1;
 434
 435         if (req->using_dma) {
 436                 if (req->req.length == 0) {
 437                         usba_ep_writel(ep, CTL_ENB, USBA_TX_PK_RDY);
 438                         return;
 439                 }
 440
 441                 if (req->req.zero)
 442                         usba_ep_writel(ep, CTL_ENB, USBA_SHORT_PACKET);
 443                 else
 444                         usba_ep_writel(ep, CTL_DIS, USBA_SHORT_PACKET);
 445
 446                 usba_dma_writel(ep, ADDRESS, req->req.dma);
 447                 usba_dma_writel(ep, CONTROL, req->ctrl);
 448         } else {
 449                 next_fifo_transaction(ep, req);
 450                 if (req->last_transaction) {
 451                         usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY);
 452                         if (ep_is_control(ep))
 453                                 usba_ep_writel(ep, CTL_ENB, USBA_TX_COMPLETE);
 454                 } else {
 455                         if (ep_is_control(ep))
 456                                 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
 457                         usba_ep_writel(ep, CTL_ENB, USBA_TX_PK_RDY);
 458                 }
 459         }
 460 }
 461
 462 static void submit_next_request(struct usba_ep *ep)
 463 {
 464         struct usba_request *req;
 465
 466         if (list_empty(&ep->queue)) {
 467                 usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY | USBA_RX_BK_RDY);
 468                 return;
 469         }
 470
 471         req = list_entry(ep->queue.next, struct usba_request, queue);
 472         if (!req->submitted)
 473                 submit_request(ep, req);
 474 }
 475
 476 static void send_status(struct usba_udc *udc, struct usba_ep *ep)
 477 {
 478         ep->state = STATUS_STAGE_IN;
 479         usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
 480         usba_ep_writel(ep, CTL_ENB, USBA_TX_COMPLETE);
 481 }
 482
 483 static void receive_data(struct usba_ep *ep)
 484 {
 485         struct usba_udc *udc = ep->udc;
 486         struct usba_request *req;
 487         unsigned long status;
 488         unsigned int bytecount, nr_busy;
 489         int is_complete = 0;
 490
 491         status = usba_ep_readl(ep, STA);
 492         nr_busy = USBA_BFEXT(BUSY_BANKS, status);
 493
 494         DBG(DBG_QUEUE, "receive data: nr_busy=%u\n", nr_busy);
 495
 496         while (nr_busy > 0) {
 497                 if (list_empty(&ep->queue)) {
 498                         usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
 499                         break;
 500                 }
 501                 req = list_entry(ep->queue.next,
 502                                  struct usba_request, queue);
 503
 504                 bytecount = USBA_BFEXT(BYTE_COUNT, status);
 505
 506                 if (status & (1 << 31))
 507                         is_complete = 1;
 508                 if (req->req.actual + bytecount >= req->req.length) {
 509                         is_complete = 1;
 510                         bytecount = req->req.length - req->req.actual;
 511                 }
 512
 513                 memcpy_fromio(req->req.buf + req->req.actual,
 514                                 ep->fifo, bytecount);
 515                 req->req.actual += bytecount;
 516
 517                 usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
 518
 519                 if (is_complete) {
 520                         DBG(DBG_QUEUE, "%s: request done\n", ep->ep.name);
 521                         req->req.status = 0;
 522                         list_del_init(&req->queue);
 523                         usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
 524                         spin_unlock(&udc->lock);
 525                         usb_gadget_giveback_request(&ep->ep, &req->req);
 526                         spin_lock(&udc->lock);
 527                 }
 528
 529                 status = usba_ep_readl(ep, STA);
 530                 nr_busy = USBA_BFEXT(BUSY_BANKS, status);
 531
 532                 if (is_complete && ep_is_control(ep)) {
 533                         send_status(udc, ep);
 534                         break;
 535                 }
 536         }
 537 }
 538
 539 static void
 540 request_complete(struct usba_ep *ep, struct usba_request *req, int status)
 541 {
 542         struct usba_udc *udc = ep->udc;
 543
 544         WARN_ON(!list_empty(&req->queue));
 545
 546         if (req->req.status == -EINPROGRESS)
 547                 req->req.status = status;
 548
 549         if (req->using_dma)
 550                 usb_gadget_unmap_request(&udc->gadget, &req->req, ep->is_in);
 551
 552         DBG(DBG_GADGET | DBG_REQ,
 553                 "%s: req %p complete: status %d, actual %u\n",
 554                 ep->ep.name, req, req->req.status, req->req.actual);
 555
 556         spin_unlock(&udc->lock);
 557         usb_gadget_giveback_request(&ep->ep, &req->req);
 558         spin_lock(&udc->lock);
 559 }
 560
 561 static void
 562 request_complete_list(struct usba_ep *ep, struct list_head *list, int status)
 563 {
 564         struct usba_request *req, *tmp_req;
 565
 566         list_for_each_entry_safe(req, tmp_req, list, queue) {
 567                 list_del_init(&req->queue);
 568                 request_complete(ep, req, status);
 569         }
 570 }
 571
 572 static int
 573 usba_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
 574 {
 575         struct usba_ep *ep = to_usba_ep(_ep);
 576         struct usba_udc *udc = ep->udc;
 577         unsigned long flags, maxpacket;
 578         unsigned int nr_trans;
 579
 580         DBG(DBG_GADGET, "%s: ep_enable: desc=%p\n", ep->ep.name, desc);
 581
 582         maxpacket = usb_endpoint_maxp(desc);
 583
 584         if (((desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK) != ep->index)
 585                         || ep->index == 0
 586                         || desc->bDescriptorType != USB_DT_ENDPOINT
 587                         || maxpacket == 0
 588                         || maxpacket > ep->fifo_size) {
 589                 DBG(DBG_ERR, "ep_enable: Invalid argument");
 590                 return -EINVAL;
 591         }
 592
 593         ep->is_isoc = 0;
 594         ep->is_in = 0;
 595
 596         DBG(DBG_ERR, "%s: EPT_CFG = 0x%lx (maxpacket = %lu)\n",
 597                         ep->ep.name, ep->ept_cfg, maxpacket);
 598
 599         if (usb_endpoint_dir_in(desc)) {
 600                 ep->is_in = 1;
 601                 ep->ept_cfg |= USBA_EPT_DIR_IN;
 602         }
 603
 604         switch (usb_endpoint_type(desc)) {
 605         case USB_ENDPOINT_XFER_CONTROL:
 606                 ep->ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_CONTROL);
 607                 break;
 608         case USB_ENDPOINT_XFER_ISOC:
 609                 if (!ep->can_isoc) {
 610                         DBG(DBG_ERR, "ep_enable: %s is not isoc capable\n",
 611                                         ep->ep.name);
 612                         return -EINVAL;
 613                 }
 614
 615                 /*
 616                  * Bits 11:12 specify number of _additional_
 617                  * transactions per microframe.
 618                  */
 619                 nr_trans = usb_endpoint_maxp_mult(desc);
 620                 if (nr_trans > 3)
 621                         return -EINVAL;
 622
 623                 ep->is_isoc = 1;
 624                 ep->ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_ISO);
 625                 ep->ept_cfg |= USBA_BF(NB_TRANS, nr_trans);
 626
 627                 break;
 628         case USB_ENDPOINT_XFER_BULK:
 629                 ep->ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_BULK);
 630                 break;
 631         case USB_ENDPOINT_XFER_INT:
 632                 ep->ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_INT);
 633                 break;
 634         }
 635
 636         spin_lock_irqsave(&ep->udc->lock, flags);
 637
 638         ep->ep.desc = desc;
 639         ep->ep.maxpacket = maxpacket;
 640
 641         usba_ep_writel(ep, CFG, ep->ept_cfg);
 642         usba_ep_writel(ep, CTL_ENB, USBA_EPT_ENABLE);
 643
 644         if (ep->can_dma) {
 645                 u32 ctrl;
 646
 647                 usba_int_enb_set(udc, USBA_BF(EPT_INT, 1 << ep->index) |
 648                                       USBA_BF(DMA_INT, 1 << ep->index));
 649                 ctrl = USBA_AUTO_VALID | USBA_INTDIS_DMA;
 650                 usba_ep_writel(ep, CTL_ENB, ctrl);
 651         } else {
 652                 usba_int_enb_set(udc, USBA_BF(EPT_INT, 1 << ep->index));
 653         }
 654
 655         spin_unlock_irqrestore(&udc->lock, flags);
 656
 657         DBG(DBG_HW, "EPT_CFG%d after init: %#08lx\n", ep->index,
 658                         (unsigned long)usba_ep_readl(ep, CFG));
 659         DBG(DBG_HW, "INT_ENB after init: %#08lx\n",
 660                         (unsigned long)usba_int_enb_get(udc));
 661
 662         return 0;
 663 }
 664
 665 static int usba_ep_disable(struct usb_ep *_ep)
 666 {
 667         struct usba_ep *ep = to_usba_ep(_ep);
 668         struct usba_udc *udc = ep->udc;
 669         LIST_HEAD(req_list);
 670         unsigned long flags;
 671
 672         DBG(DBG_GADGET, "ep_disable: %s\n", ep->ep.name);
 673
 674         spin_lock_irqsave(&udc->lock, flags);
 675
 676         if (!ep->ep.desc) {
 677                 spin_unlock_irqrestore(&udc->lock, flags);
 678                 DBG(DBG_ERR, "ep_disable: %s not enabled\n", ep->ep.name);
 679                 return -EINVAL;
 680         }
 681         ep->ep.desc = NULL;
 682
 683         list_splice_init(&ep->queue, &req_list);
 684         if (ep->can_dma) {
 685                 usba_dma_writel(ep, CONTROL, 0);
 686                 usba_dma_writel(ep, ADDRESS, 0);
 687                 usba_dma_readl(ep, STATUS);
 688         }
 689         usba_ep_writel(ep, CTL_DIS, USBA_EPT_ENABLE);
 690         usba_int_enb_clear(udc, USBA_BF(EPT_INT, 1 << ep->index));
 691
 692         request_complete_list(ep, &req_list, -ESHUTDOWN);
 693
 694         spin_unlock_irqrestore(&udc->lock, flags);
 695
 696         return 0;
 697 }
 698
 699 static struct usb_request *
 700 usba_ep_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
 701 {
 702         struct usba_request *req;
 703
 704         DBG(DBG_GADGET, "ep_alloc_request: %p, 0x%x\n", _ep, gfp_flags);
 705
 706         req = kzalloc(sizeof(*req), gfp_flags);
 707         if (!req)
 708                 return NULL;
 709
 710         INIT_LIST_HEAD(&req->queue);
 711
 712         return &req->req;
 713 }
 714
 715 static void
 716 usba_ep_free_request(struct usb_ep *_ep, struct usb_request *_req)
 717 {
 718         struct usba_request *req = to_usba_req(_req);
 719
 720         DBG(DBG_GADGET, "ep_free_request: %p, %p\n", _ep, _req);
 721
 722         kfree(req);
 723 }
 724
 725 static int queue_dma(struct usba_udc *udc, struct usba_ep *ep,
 726                 struct usba_request *req, gfp_t gfp_flags)
 727 {
 728         unsigned long flags;
 729         int ret;
 730
 731         DBG(DBG_DMA, "%s: req l/%u d/%pad %c%c%c\n",
 732                 ep->ep.name, req->req.length, &req->req.dma,
 733                 req->req.zero ? 'Z' : 'z',
 734                 req->req.short_not_ok ? 'S' : 's',
 735                 req->req.no_interrupt ? 'I' : 'i');
 736
 737         if (req->req.length > 0x10000) {
 738                 /* Lengths from 0 to 65536 (inclusive) are supported */
 739                 DBG(DBG_ERR, "invalid request length %u\n", req->req.length);
 740                 return -EINVAL;
 741         }
 742
 743         ret = usb_gadget_map_request(&udc->gadget, &req->req, ep->is_in);
 744         if (ret)
 745                 return ret;
 746
 747         req->using_dma = 1;
 748         req->ctrl = USBA_BF(DMA_BUF_LEN, req->req.length)
 749                         | USBA_DMA_CH_EN | USBA_DMA_END_BUF_IE
 750                         | USBA_DMA_END_BUF_EN;
 751
 752         if (!ep->is_in)
 753                 req->ctrl |= USBA_DMA_END_TR_EN | USBA_DMA_END_TR_IE;
 754
 755         /*
 756          * Add this request to the queue and submit for DMA if
 757          * possible. Check if we're still alive first -- we may have
 758          * received a reset since last time we checked.
 759          */
 760         ret = -ESHUTDOWN;
 761         spin_lock_irqsave(&udc->lock, flags);
 762         if (ep->ep.desc) {
 763                 if (list_empty(&ep->queue))
 764                         submit_request(ep, req);
 765
 766                 list_add_tail(&req->queue, &ep->queue);
 767                 ret = 0;
 768         }
 769         spin_unlock_irqrestore(&udc->lock, flags);
 770
 771         return ret;
 772 }
 773
 774 static int
 775 usba_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
 776 {
 777         struct usba_request *req = to_usba_req(_req);
 778         struct usba_ep *ep = to_usba_ep(_ep);
 779         struct usba_udc *udc = ep->udc;
 780         unsigned long flags;
 781         int ret;
 782
 783         DBG(DBG_GADGET | DBG_QUEUE | DBG_REQ, "%s: queue req %p, len %u\n",
 784                         ep->ep.name, req, _req->length);
 785
 786         if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN ||
 787             !ep->ep.desc)
 788                 return -ESHUTDOWN;
 789
 790         req->submitted = 0;
 791         req->using_dma = 0;
 792         req->last_transaction = 0;
 793
 794         _req->status = -EINPROGRESS;
 795         _req->actual = 0;
 796
 797         if (ep->can_dma)
 798                 return queue_dma(udc, ep, req, gfp_flags);
 799
 800         /* May have received a reset since last time we checked */
 801         ret = -ESHUTDOWN;
 802         spin_lock_irqsave(&udc->lock, flags);
 803         if (ep->ep.desc) {
 804                 list_add_tail(&req->queue, &ep->queue);
 805
 806                 if ((!ep_is_control(ep) && ep->is_in) ||
 807                         (ep_is_control(ep)
 808                                 && (ep->state == DATA_STAGE_IN
 809                                         || ep->state == STATUS_STAGE_IN)))
 810                         usba_ep_writel(ep, CTL_ENB, USBA_TX_PK_RDY);
 811                 else
 812                         usba_ep_writel(ep, CTL_ENB, USBA_RX_BK_RDY);
 813                 ret = 0;
 814         }
 815         spin_unlock_irqrestore(&udc->lock, flags);
 816
 817         return ret;
 818 }
 819
 820 static void
 821 usba_update_req(struct usba_ep *ep, struct usba_request *req, u32 status)
 822 {
 823         req->req.actual = req->req.length - USBA_BFEXT(DMA_BUF_LEN, status);
 824 }
 825
 826 static int stop_dma(struct usba_ep *ep, u32 *pstatus)
 827 {
 828         unsigned int timeout;
 829         u32 status;
 830
 831         /*
 832          * Stop the DMA controller. When writing both CH_EN
 833          * and LINK to 0, the other bits are not affected.
 834          */
 835         usba_dma_writel(ep, CONTROL, 0);
 836
 837         /* Wait for the FIFO to empty */
 838         for (timeout = 40; timeout; --timeout) {
 839                 status = usba_dma_readl(ep, STATUS);
 840                 if (!(status & USBA_DMA_CH_EN))
 841                         break;
 842                 udelay(1);
 843         }
 844
 845         if (pstatus)
 846                 *pstatus = status;
 847
 848         if (timeout == 0) {
 849                 dev_err(&ep->udc->pdev->dev,
 850                         "%s: timed out waiting for DMA FIFO to empty\n",
 851                         ep->ep.name);
 852                 return -ETIMEDOUT;
 853         }
 854
 855         return 0;
 856 }
 857
 858 static int usba_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
 859 {
 860         struct usba_ep *ep = to_usba_ep(_ep);
 861         struct usba_udc *udc = ep->udc;
 862         struct usba_request *req = NULL;
 863         struct usba_request *iter;
 864         unsigned long flags;
 865         u32 status;
 866
 867         DBG(DBG_GADGET | DBG_QUEUE, "ep_dequeue: %s, req %p\n",
 868                         ep->ep.name, _req);
 869
 870         spin_lock_irqsave(&udc->lock, flags);
 871
 872         list_for_each_entry(iter, &ep->queue, queue) {
 873                 if (&iter->req != _req)
 874                         continue;
 875                 req = iter;
 876                 break;
 877         }
 878
 879         if (!req) {
 880                 spin_unlock_irqrestore(&udc->lock, flags);
 881                 return -EINVAL;
 882         }
 883
 884         if (req->using_dma) {
 885                 /*
 886                  * If this request is currently being transferred,
 887                  * stop the DMA controller and reset the FIFO.
 888                  */
 889                 if (ep->queue.next == &req->queue) {
 890                         status = usba_dma_readl(ep, STATUS);
 891                         if (status & USBA_DMA_CH_EN)
 892                                 stop_dma(ep, &status);
 893
 894 #ifdef CONFIG_USB_GADGET_DEBUG_FS
 895                         ep->last_dma_status = status;
 896 #endif
 897
 898                         usba_writel(udc, EPT_RST, 1 << ep->index);
 899
 900                         usba_update_req(ep, req, status);
 901                 }
 902         }
 903
 904         /*
 905          * Errors should stop the queue from advancing until the
 906          * completion function returns.
 907          */
 908         list_del_init(&req->queue);
 909
 910         request_complete(ep, req, -ECONNRESET);
 911
 912         /* Process the next request if any */
 913         submit_next_request(ep);
 914         spin_unlock_irqrestore(&udc->lock, flags);
 915
 916         return 0;
 917 }
 918
 919 static int usba_ep_set_halt(struct usb_ep *_ep, int value)
 920 {
 921         struct usba_ep *ep = to_usba_ep(_ep);
 922         struct usba_udc *udc = ep->udc;
 923         unsigned long flags;
 924         int ret = 0;
 925
 926         DBG(DBG_GADGET, "endpoint %s: %s HALT\n", ep->ep.name,
 927                         value ? "set" : "clear");
 928
 929         if (!ep->ep.desc) {
 930                 DBG(DBG_ERR, "Attempted to halt uninitialized ep %s\n",
 931                                 ep->ep.name);
 932                 return -ENODEV;
 933         }
 934         if (ep->is_isoc) {
 935                 DBG(DBG_ERR, "Attempted to halt isochronous ep %s\n",
 936                                 ep->ep.name);
 937                 return -ENOTTY;
 938         }
 939
 940         spin_lock_irqsave(&udc->lock, flags);
 941
 942         /*
 943          * We can't halt IN endpoints while there are still data to be
 944          * transferred
 945          */
 946         if (!list_empty(&ep->queue)
 947                         || ((value && ep->is_in && (usba_ep_readl(ep, STA)
 948                                         & USBA_BF(BUSY_BANKS, -1L))))) {
 949                 ret = -EAGAIN;
 950         } else {
 951                 if (value)
 952                         usba_ep_writel(ep, SET_STA, USBA_FORCE_STALL);
 953                 else
 954                         usba_ep_writel(ep, CLR_STA,
 955                                         USBA_FORCE_STALL | USBA_TOGGLE_CLR);
 956                 usba_ep_readl(ep, STA);
 957         }
 958
 959         spin_unlock_irqrestore(&udc->lock, flags);
 960
 961         return ret;
 962 }
 963
 964 static int usba_ep_fifo_status(struct usb_ep *_ep)
 965 {
 966         struct usba_ep *ep = to_usba_ep(_ep);
 967
 968         return USBA_BFEXT(BYTE_COUNT, usba_ep_readl(ep, STA));
 969 }
 970
 971 static void usba_ep_fifo_flush(struct usb_ep *_ep)
 972 {
 973         struct usba_ep *ep = to_usba_ep(_ep);
 974         struct usba_udc *udc = ep->udc;
 975
 976         usba_writel(udc, EPT_RST, 1 << ep->index);
 977 }
 978
 979 static const struct usb_ep_ops usba_ep_ops = {
 980         .enable         = usba_ep_enable,
 981         .disable        = usba_ep_disable,
 982         .alloc_request  = usba_ep_alloc_request,
 983         .free_request   = usba_ep_free_request,
 984         .queue          = usba_ep_queue,
 985         .dequeue        = usba_ep_dequeue,
 986         .set_halt       = usba_ep_set_halt,
 987         .fifo_status    = usba_ep_fifo_status,
 988         .fifo_flush     = usba_ep_fifo_flush,
 989 };
 990
 991 static int usba_udc_get_frame(struct usb_gadget *gadget)
 992 {
 993         struct usba_udc *udc = to_usba_udc(gadget);
 994
 995         return USBA_BFEXT(FRAME_NUMBER, usba_readl(udc, FNUM));
 996 }
 997
 998 static int usba_udc_wakeup(struct usb_gadget *gadget)
 999 {
1000         struct usba_udc *udc = to_usba_udc(gadget);
1001         unsigned long flags;
1002         u32 ctrl;
1003         int ret = -EINVAL;
1004
1005         spin_lock_irqsave(&udc->lock, flags);
1006         if (udc->devstatus & (1 << USB_DEVICE_REMOTE_WAKEUP)) {
1007                 ctrl = usba_readl(udc, CTRL);
1008                 usba_writel(udc, CTRL, ctrl | USBA_REMOTE_WAKE_UP);
1009                 ret = 0;
1010         }
1011         spin_unlock_irqrestore(&udc->lock, flags);
1012
1013         return ret;
1014 }
1015
1016 static int
1017 usba_udc_set_selfpowered(struct usb_gadget *gadget, int is_selfpowered)
1018 {
1019         struct usba_udc *udc = to_usba_udc(gadget);
1020         unsigned long flags;
1021
1022         gadget->is_selfpowered = (is_selfpowered != 0);
1023         spin_lock_irqsave(&udc->lock, flags);
1024         if (is_selfpowered)
1025                 udc->devstatus |= 1 << USB_DEVICE_SELF_POWERED;
1026         else
1027                 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
1028         spin_unlock_irqrestore(&udc->lock, flags);
1029
1030         return 0;
1031 }
1032
1033 static int atmel_usba_pullup(struct usb_gadget *gadget, int is_on);
1034 static int atmel_usba_start(struct usb_gadget *gadget,
1035                 struct usb_gadget_driver *driver);
1036 static int atmel_usba_stop(struct usb_gadget *gadget);
1037
1038 static struct usb_ep *atmel_usba_match_ep(struct usb_gadget *gadget,
1039                                 struct usb_endpoint_descriptor  *desc,
1040                                 struct usb_ss_ep_comp_descriptor *ep_comp)
1041 {
1042         struct usb_ep   *_ep;
1043         struct usba_ep *ep;
1044
1045         /* Look at endpoints until an unclaimed one looks usable */
1046         list_for_each_entry(_ep, &gadget->ep_list, ep_list) {
1047                 if (usb_gadget_ep_match_desc(gadget, _ep, desc, ep_comp))
1048                         goto found_ep;
1049         }
1050         /* Fail */
1051         return NULL;
1052
1053 found_ep:
1054
1055         if (fifo_mode == 0) {
1056                 /* Optimize hw fifo size based on ep type and other info */
1057                 ep = to_usba_ep(_ep);
1058
1059                 switch (usb_endpoint_type(desc)) {
1060                 case USB_ENDPOINT_XFER_CONTROL:
1061                         ep->nr_banks = 1;
1062                         break;
1063
1064                 case USB_ENDPOINT_XFER_ISOC:
1065                         ep->fifo_size = 1024;
1066                         if (ep->udc->ep_prealloc)
1067                                 ep->nr_banks = 2;
1068                         break;
1069
1070                 case USB_ENDPOINT_XFER_BULK:
1071                         ep->fifo_size = 512;
1072                         if (ep->udc->ep_prealloc)
1073                                 ep->nr_banks = 1;
1074                         break;
1075
1076                 case USB_ENDPOINT_XFER_INT:
1077                         if (desc->wMaxPacketSize == 0)
1078                                 ep->fifo_size =
1079                                     roundup_pow_of_two(_ep->maxpacket_limit);
1080                         else
1081                                 ep->fifo_size =
1082                                     roundup_pow_of_two(le16_to_cpu(desc->wMaxPacketSize));
1083                         if (ep->udc->ep_prealloc)
1084                                 ep->nr_banks = 1;
1085                         break;
1086                 }
1087
1088                 /* It might be a little bit late to set this */
1089                 usb_ep_set_maxpacket_limit(&ep->ep, ep->fifo_size);
1090
1091                 /* Generate ept_cfg basd on FIFO size and number of banks */
1092                 if (ep->fifo_size  <= 8)
1093                         ep->ept_cfg = USBA_BF(EPT_SIZE, USBA_EPT_SIZE_8);
1094                 else
1095                         /* LSB is bit 1, not 0 */
1096                         ep->ept_cfg =
1097                                 USBA_BF(EPT_SIZE, fls(ep->fifo_size - 1) - 3);
1098
1099                 ep->ept_cfg |= USBA_BF(BK_NUMBER, ep->nr_banks);
1100         }
1101
1102         return _ep;
1103 }
1104
1105 static const struct usb_gadget_ops usba_udc_ops = {
1106         .get_frame              = usba_udc_get_frame,
1107         .wakeup                 = usba_udc_wakeup,
1108         .set_selfpowered        = usba_udc_set_selfpowered,
1109         .pullup                 = atmel_usba_pullup,
1110         .udc_start              = atmel_usba_start,
1111         .udc_stop               = atmel_usba_stop,
1112         .match_ep               = atmel_usba_match_ep,
1113 };
1114
1115 static struct usb_endpoint_descriptor usba_ep0_desc = {
1116         .bLength = USB_DT_ENDPOINT_SIZE,
1117         .bDescriptorType = USB_DT_ENDPOINT,
1118         .bEndpointAddress = 0,
1119         .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
1120         .wMaxPacketSize = cpu_to_le16(64),
1121         /* FIXME: I have no idea what to put here */
1122         .bInterval = 1,
1123 };
1124
1125 static const struct usb_gadget usba_gadget_template = {
1126         .ops            = &usba_udc_ops,
1127         .max_speed      = USB_SPEED_HIGH,
1128         .name           = "atmel_usba_udc",
1129 };
1130
1131 /*
1132  * Called with interrupts disabled and udc->lock held.
1133  */
1134 static void reset_all_endpoints(struct usba_udc *udc)
1135 {
1136         struct usba_ep *ep;
1137         struct usba_request *req, *tmp_req;
1138
1139         usba_writel(udc, EPT_RST, ~0UL);
1140
1141         ep = to_usba_ep(udc->gadget.ep0);
1142         list_for_each_entry_safe(req, tmp_req, &ep->queue, queue) {
1143                 list_del_init(&req->queue);
1144                 request_complete(ep, req, -ECONNRESET);
1145         }
1146 }
1147
1148 static struct usba_ep *get_ep_by_addr(struct usba_udc *udc, u16 wIndex)
1149 {
1150         struct usba_ep *ep;
1151
1152         if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0)
1153                 return to_usba_ep(udc->gadget.ep0);
1154
1155         list_for_each_entry (ep, &udc->gadget.ep_list, ep.ep_list) {
1156                 u8 bEndpointAddress;
1157
1158                 if (!ep->ep.desc)
1159                         continue;
1160                 bEndpointAddress = ep->ep.desc->bEndpointAddress;
1161                 if ((wIndex ^ bEndpointAddress) & USB_DIR_IN)
1162                         continue;
1163                 if ((bEndpointAddress & USB_ENDPOINT_NUMBER_MASK)
1164                                 == (wIndex & USB_ENDPOINT_NUMBER_MASK))
1165                         return ep;
1166         }
1167
1168         return NULL;
1169 }
1170
1171 /* Called with interrupts disabled and udc->lock held */
1172 static inline void set_protocol_stall(struct usba_udc *udc, struct usba_ep *ep)
1173 {
1174         usba_ep_writel(ep, SET_STA, USBA_FORCE_STALL);
1175         ep->state = WAIT_FOR_SETUP;
1176 }
1177
1178 static inline int is_stalled(struct usba_udc *udc, struct usba_ep *ep)
1179 {
1180         if (usba_ep_readl(ep, STA) & USBA_FORCE_STALL)
1181                 return 1;
1182         return 0;
1183 }
1184
1185 static inline void set_address(struct usba_udc *udc, unsigned int addr)
1186 {
1187         u32 regval;
1188
1189         DBG(DBG_BUS, "setting address %u...\n", addr);
1190         regval = usba_readl(udc, CTRL);
1191         regval = USBA_BFINS(DEV_ADDR, addr, regval);
1192         usba_writel(udc, CTRL, regval);
1193 }
1194
1195 static int do_test_mode(struct usba_udc *udc)
1196 {
1197         static const char test_packet_buffer[] = {
1198                 /* JKJKJKJK * 9 */
1199                 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
1200                 /* JJKKJJKK * 8 */
1201                 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA,
1202                 /* JJKKJJKK * 8 */
1203                 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE,
1204                 /* JJJJJJJKKKKKKK * 8 */
1205                 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
1206                 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
1207                 /* JJJJJJJK * 8 */
1208                 0x7F, 0xBF, 0xDF, 0xEF, 0xF7, 0xFB, 0xFD,
1209                 /* {JKKKKKKK * 10}, JK */
1210                 0xFC, 0x7E, 0xBF, 0xDF, 0xEF, 0xF7, 0xFB, 0xFD, 0x7E
1211         };
1212         struct usba_ep *ep;
1213         struct device *dev = &udc->pdev->dev;
1214         int test_mode;
1215
1216         test_mode = udc->test_mode;
1217
1218         /* Start from a clean slate */
1219         reset_all_endpoints(udc);
1220
1221         switch (test_mode) {
1222         case 0x0100:
1223                 /* Test_J */
1224                 usba_writel(udc, TST, USBA_TST_J_MODE);
1225                 dev_info(dev, "Entering Test_J mode...\n");
1226                 break;
1227         case 0x0200:
1228                 /* Test_K */
1229                 usba_writel(udc, TST, USBA_TST_K_MODE);
1230                 dev_info(dev, "Entering Test_K mode...\n");
1231                 break;
1232         case 0x0300:
1233                 /*
1234                  * Test_SE0_NAK: Force high-speed mode and set up ep0
1235                  * for Bulk IN transfers
1236                  */
1237                 ep = &udc->usba_ep[0];
1238                 usba_writel(udc, TST,
1239                                 USBA_BF(SPEED_CFG, USBA_SPEED_CFG_FORCE_HIGH));
1240                 usba_ep_writel(ep, CFG,
1241                                 USBA_BF(EPT_SIZE, USBA_EPT_SIZE_64)
1242                                 | USBA_EPT_DIR_IN
1243                                 | USBA_BF(EPT_TYPE, USBA_EPT_TYPE_BULK)
1244                                 | USBA_BF(BK_NUMBER, 1));
1245                 if (!(usba_ep_readl(ep, CFG) & USBA_EPT_MAPPED)) {
1246                         set_protocol_stall(udc, ep);
1247                         dev_err(dev, "Test_SE0_NAK: ep0 not mapped\n");
1248                 } else {
1249                         usba_ep_writel(ep, CTL_ENB, USBA_EPT_ENABLE);
1250                         dev_info(dev, "Entering Test_SE0_NAK mode...\n");
1251                 }
1252                 break;
1253         case 0x0400:
1254                 /* Test_Packet */
1255                 ep = &udc->usba_ep[0];
1256                 usba_ep_writel(ep, CFG,
1257                                 USBA_BF(EPT_SIZE, USBA_EPT_SIZE_64)
1258                                 | USBA_EPT_DIR_IN
1259                                 | USBA_BF(EPT_TYPE, USBA_EPT_TYPE_BULK)
1260                                 | USBA_BF(BK_NUMBER, 1));
1261                 if (!(usba_ep_readl(ep, CFG) & USBA_EPT_MAPPED)) {
1262                         set_protocol_stall(udc, ep);
1263                         dev_err(dev, "Test_Packet: ep0 not mapped\n");
1264                 } else {
1265                         usba_ep_writel(ep, CTL_ENB, USBA_EPT_ENABLE);
1266                         usba_writel(udc, TST, USBA_TST_PKT_MODE);
1267                         memcpy_toio(ep->fifo, test_packet_buffer,
1268                                         sizeof(test_packet_buffer));
1269                         usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
1270                         dev_info(dev, "Entering Test_Packet mode...\n");
1271                 }
1272                 break;
1273         default:
1274                 dev_err(dev, "Invalid test mode: 0x%04x\n", test_mode);
1275                 return -EINVAL;
1276         }
1277
1278         return 0;
1279 }
1280
1281 /* Avoid overly long expressions */
1282 static inline bool feature_is_dev_remote_wakeup(struct usb_ctrlrequest *crq)
1283 {
1284         if (crq->wValue == cpu_to_le16(USB_DEVICE_REMOTE_WAKEUP))
1285                 return true;
1286         return false;
1287 }
1288
1289 static inline bool feature_is_dev_test_mode(struct usb_ctrlrequest *crq)
1290 {
1291         if (crq->wValue == cpu_to_le16(USB_DEVICE_TEST_MODE))
1292                 return true;
1293         return false;
1294 }
1295
1296 static inline bool feature_is_ep_halt(struct usb_ctrlrequest *crq)
1297 {
1298         if (crq->wValue == cpu_to_le16(USB_ENDPOINT_HALT))
1299                 return true;
1300         return false;
1301 }
1302
1303 static int handle_ep0_setup(struct usba_udc *udc, struct usba_ep *ep,
1304                 struct usb_ctrlrequest *crq)
1305 {
1306         int retval = 0;
1307
1308         switch (crq->bRequest) {
1309         case USB_REQ_GET_STATUS: {
1310                 u16 status;
1311
1312                 if (crq->bRequestType == (USB_DIR_IN | USB_RECIP_DEVICE)) {
1313                         status = cpu_to_le16(udc->devstatus);
1314                 } else if (crq->bRequestType
1315                                 == (USB_DIR_IN | USB_RECIP_INTERFACE)) {
1316                         status = cpu_to_le16(0);
1317                 } else if (crq->bRequestType
1318                                 == (USB_DIR_IN | USB_RECIP_ENDPOINT)) {
1319                         struct usba_ep *target;
1320
1321                         target = get_ep_by_addr(udc, le16_to_cpu(crq->wIndex));
1322                         if (!target)
1323                                 goto stall;
1324
1325                         status = 0;
1326                         if (is_stalled(udc, target))
1327                                 status |= cpu_to_le16(1);
1328                 } else
1329                         goto delegate;
1330
1331                 /* Write directly to the FIFO. No queueing is done. */
1332                 if (crq->wLength != cpu_to_le16(sizeof(status)))
1333                         goto stall;
1334                 ep->state = DATA_STAGE_IN;
1335                 writew_relaxed(status, ep->fifo);
1336                 usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
1337                 break;
1338         }
1339
1340         case USB_REQ_CLEAR_FEATURE: {
1341                 if (crq->bRequestType == USB_RECIP_DEVICE) {
1342                         if (feature_is_dev_remote_wakeup(crq))
1343                                 udc->devstatus
1344                                         &= ~(1 << USB_DEVICE_REMOTE_WAKEUP);
1345                         else
1346                                 /* Can't CLEAR_FEATURE TEST_MODE */
1347                                 goto stall;
1348                 } else if (crq->bRequestType == USB_RECIP_ENDPOINT) {
1349                         struct usba_ep *target;
1350
1351                         if (crq->wLength != cpu_to_le16(0)
1352                                         || !feature_is_ep_halt(crq))
1353                                 goto stall;
1354                         target = get_ep_by_addr(udc, le16_to_cpu(crq->wIndex));
1355                         if (!target)
1356                                 goto stall;
1357
1358                         usba_ep_writel(target, CLR_STA, USBA_FORCE_STALL);
1359                         if (target->index != 0)
1360                                 usba_ep_writel(target, CLR_STA,
1361                                                 USBA_TOGGLE_CLR);
1362                 } else {
1363                         goto delegate;
1364                 }
1365
1366                 send_status(udc, ep);
1367                 break;
1368         }
1369
1370         case USB_REQ_SET_FEATURE: {
1371                 if (crq->bRequestType == USB_RECIP_DEVICE) {
1372                         if (feature_is_dev_test_mode(crq)) {
1373                                 send_status(udc, ep);
1374                                 ep->state = STATUS_STAGE_TEST;
1375                                 udc->test_mode = le16_to_cpu(crq->wIndex);
1376                                 return 0;
1377                         } else if (feature_is_dev_remote_wakeup(crq)) {
1378                                 udc->devstatus |= 1 << USB_DEVICE_REMOTE_WAKEUP;
1379                         } else {
1380                                 goto stall;
1381                         }
1382                 } else if (crq->bRequestType == USB_RECIP_ENDPOINT) {
1383                         struct usba_ep *target;
1384
1385                         if (crq->wLength != cpu_to_le16(0)
1386                                         || !feature_is_ep_halt(crq))
1387                                 goto stall;
1388
1389                         target = get_ep_by_addr(udc, le16_to_cpu(crq->wIndex));
1390                         if (!target)
1391                                 goto stall;
1392
1393                         usba_ep_writel(target, SET_STA, USBA_FORCE_STALL);
1394                 } else
1395                         goto delegate;
1396
1397                 send_status(udc, ep);
1398                 break;
1399         }
1400
1401         case USB_REQ_SET_ADDRESS:
1402                 if (crq->bRequestType != (USB_DIR_OUT | USB_RECIP_DEVICE))
1403                         goto delegate;
1404
1405                 set_address(udc, le16_to_cpu(crq->wValue));
1406                 send_status(udc, ep);
1407                 ep->state = STATUS_STAGE_ADDR;
1408                 break;
1409
1410         default:
1411 delegate:
1412                 spin_unlock(&udc->lock);
1413                 retval = udc->driver->setup(&udc->gadget, crq);
1414                 spin_lock(&udc->lock);
1415         }
1416
1417         return retval;
1418
1419 stall:
1420         pr_err("udc: %s: Invalid setup request: %02x.%02x v%04x i%04x l%d, "
1421                 "halting endpoint...\n",
1422                 ep->ep.name, crq->bRequestType, crq->bRequest,
1423                 le16_to_cpu(crq->wValue), le16_to_cpu(crq->wIndex),
1424                 le16_to_cpu(crq->wLength));
1425         set_protocol_stall(udc, ep);
1426         return -1;
1427 }
1428
1429 static void usba_control_irq(struct usba_udc *udc, struct usba_ep *ep)
1430 {
1431         struct usba_request *req;
1432         u32 epstatus;
1433         u32 epctrl;
1434
1435 restart:
1436         epstatus = usba_ep_readl(ep, STA);
1437         epctrl = usba_ep_readl(ep, CTL);
1438
1439         DBG(DBG_INT, "%s [%d]: s/%08x c/%08x\n",
1440                         ep->ep.name, ep->state, epstatus, epctrl);
1441
1442         req = NULL;
1443         if (!list_empty(&ep->queue))
1444                 req = list_entry(ep->queue.next,
1445                                  struct usba_request, queue);
1446
1447         if ((epctrl & USBA_TX_PK_RDY) && !(epstatus & USBA_TX_PK_RDY)) {
1448                 if (req->submitted)
1449                         next_fifo_transaction(ep, req);
1450                 else
1451                         submit_request(ep, req);
1452
1453                 if (req->last_transaction) {
1454                         usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY);
1455                         usba_ep_writel(ep, CTL_ENB, USBA_TX_COMPLETE);
1456                 }
1457                 goto restart;
1458         }
1459         if ((epstatus & epctrl) & USBA_TX_COMPLETE) {
1460                 usba_ep_writel(ep, CLR_STA, USBA_TX_COMPLETE);
1461
1462                 switch (ep->state) {
1463                 case DATA_STAGE_IN:
1464                         usba_ep_writel(ep, CTL_ENB, USBA_RX_BK_RDY);
1465                         usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1466                         ep->state = STATUS_STAGE_OUT;
1467                         break;
1468                 case STATUS_STAGE_ADDR:
1469                         /* Activate our new address */
1470                         usba_writel(udc, CTRL, (usba_readl(udc, CTRL)
1471                                                 | USBA_FADDR_EN));
1472                         usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1473                         ep->state = WAIT_FOR_SETUP;
1474                         break;
1475                 case STATUS_STAGE_IN:
1476                         if (req) {
1477                                 list_del_init(&req->queue);
1478                                 request_complete(ep, req, 0);
1479                                 submit_next_request(ep);
1480                         }
1481                         usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1482                         ep->state = WAIT_FOR_SETUP;
1483                         break;
1484                 case STATUS_STAGE_TEST:
1485                         usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1486                         ep->state = WAIT_FOR_SETUP;
1487                         if (do_test_mode(udc))
1488                                 set_protocol_stall(udc, ep);
1489                         break;
1490                 default:
1491                         pr_err("udc: %s: TXCOMP: Invalid endpoint state %d, "
1492                                 "halting endpoint...\n",
1493                                 ep->ep.name, ep->state);
1494                         set_protocol_stall(udc, ep);
1495                         break;
1496                 }
1497
1498                 goto restart;
1499         }
1500         if ((epstatus & epctrl) & USBA_RX_BK_RDY) {
1501                 switch (ep->state) {
1502                 case STATUS_STAGE_OUT:
1503                         usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
1504                         usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
1505
1506                         if (req) {
1507                                 list_del_init(&req->queue);
1508                                 request_complete(ep, req, 0);
1509                         }
1510                         ep->state = WAIT_FOR_SETUP;
1511                         break;
1512
1513                 case DATA_STAGE_OUT:
1514                         receive_data(ep);
1515                         break;
1516
1517                 default:
1518                         usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
1519                         usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
1520                         pr_err("udc: %s: RXRDY: Invalid endpoint state %d, "
1521                                 "halting endpoint...\n",
1522                                 ep->ep.name, ep->state);
1523                         set_protocol_stall(udc, ep);
1524                         break;
1525                 }
1526
1527                 goto restart;
1528         }
1529         if (epstatus & USBA_RX_SETUP) {
1530                 union {
1531                         struct usb_ctrlrequest crq;
1532                         unsigned long data[2];
1533                 } crq;
1534                 unsigned int pkt_len;
1535                 int ret;
1536
1537                 if (ep->state != WAIT_FOR_SETUP) {
1538                         /*
1539                          * Didn't expect a SETUP packet at this
1540                          * point. Clean up any pending requests (which
1541                          * may be successful).
1542                          */
1543                         int status = -EPROTO;
1544
1545                         /*
1546                          * RXRDY and TXCOMP are dropped when SETUP
1547                          * packets arrive.  Just pretend we received
1548                          * the status packet.
1549                          */
1550                         if (ep->state == STATUS_STAGE_OUT
1551                                         || ep->state == STATUS_STAGE_IN) {
1552                                 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
1553                                 status = 0;
1554                         }
1555
1556                         if (req) {
1557                                 list_del_init(&req->queue);
1558                                 request_complete(ep, req, status);
1559                         }
1560                 }
1561
1562                 pkt_len = USBA_BFEXT(BYTE_COUNT, usba_ep_readl(ep, STA));
1563                 DBG(DBG_HW, "Packet length: %u\n", pkt_len);
1564                 if (pkt_len != sizeof(crq)) {
1565                         pr_warn("udc: Invalid packet length %u (expected %zu)\n",
1566                                 pkt_len, sizeof(crq));
1567                         set_protocol_stall(udc, ep);
1568                         return;
1569                 }
1570
1571                 DBG(DBG_FIFO, "Copying ctrl request from 0x%p:\n", ep->fifo);
1572                 memcpy_fromio(crq.data, ep->fifo, sizeof(crq));
1573
1574                 /* Free up one bank in the FIFO so that we can
1575                  * generate or receive a reply right away. */
1576                 usba_ep_writel(ep, CLR_STA, USBA_RX_SETUP);
1577
1578                 /* printk(KERN_DEBUG "setup: %d: %02x.%02x\n",
1579                         ep->state, crq.crq.bRequestType,
1580                         crq.crq.bRequest); */
1581
1582                 if (crq.crq.bRequestType & USB_DIR_IN) {
1583                         /*
1584                          * The USB 2.0 spec states that "if wLength is
1585                          * zero, there is no data transfer phase."
1586                          * However, testusb #14 seems to actually
1587                          * expect a data phase even if wLength = 0...
1588                          */
1589                         ep->state = DATA_STAGE_IN;
1590                 } else {
1591                         if (crq.crq.wLength != cpu_to_le16(0))
1592                                 ep->state = DATA_STAGE_OUT;
1593                         else
1594                                 ep->state = STATUS_STAGE_IN;
1595                 }
1596
1597                 ret = -1;
1598                 if (ep->index == 0)
1599                         ret = handle_ep0_setup(udc, ep, &crq.crq);
1600                 else {
1601                         spin_unlock(&udc->lock);
1602                         ret = udc->driver->setup(&udc->gadget, &crq.crq);
1603                         spin_lock(&udc->lock);
1604                 }
1605
1606                 DBG(DBG_BUS, "req %02x.%02x, length %d, state %d, ret %d\n",
1607                         crq.crq.bRequestType, crq.crq.bRequest,
1608                         le16_to_cpu(crq.crq.wLength), ep->state, ret);
1609
1610                 if (ret < 0) {
1611                         /* Let the host know that we failed */
1612                         set_protocol_stall(udc, ep);
1613                 }
1614         }
1615 }
1616
1617 static void usba_ep_irq(struct usba_udc *udc, struct usba_ep *ep)
1618 {
1619         struct usba_request *req;
1620         u32 epstatus;
1621         u32 epctrl;
1622
1623         epstatus = usba_ep_readl(ep, STA);
1624         epctrl = usba_ep_readl(ep, CTL);
1625
1626         DBG(DBG_INT, "%s: interrupt, status: 0x%08x\n", ep->ep.name, epstatus);
1627
1628         while ((epctrl & USBA_TX_PK_RDY) && !(epstatus & USBA_TX_PK_RDY)) {
1629                 DBG(DBG_BUS, "%s: TX PK ready\n", ep->ep.name);
1630
1631                 if (list_empty(&ep->queue)) {
1632                         dev_warn(&udc->pdev->dev, "ep_irq: queue empty\n");
1633                         usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY);
1634                         return;
1635                 }
1636
1637                 req = list_entry(ep->queue.next, struct usba_request, queue);
1638
1639                 if (req->using_dma) {
1640                         /* Send a zero-length packet */
1641                         usba_ep_writel(ep, SET_STA,
1642                                         USBA_TX_PK_RDY);
1643                         usba_ep_writel(ep, CTL_DIS,
1644                                         USBA_TX_PK_RDY);
1645                         list_del_init(&req->queue);
1646                         submit_next_request(ep);
1647                         request_complete(ep, req, 0);
1648                 } else {
1649                         if (req->submitted)
1650                                 next_fifo_transaction(ep, req);
1651                         else
1652                                 submit_request(ep, req);
1653
1654                         if (req->last_transaction) {
1655                                 list_del_init(&req->queue);
1656                                 submit_next_request(ep);
1657                                 request_complete(ep, req, 0);
1658                         }
1659                 }
1660
1661                 epstatus = usba_ep_readl(ep, STA);
1662                 epctrl = usba_ep_readl(ep, CTL);
1663         }
1664         if ((epstatus & epctrl) & USBA_RX_BK_RDY) {
1665                 DBG(DBG_BUS, "%s: RX data ready\n", ep->ep.name);
1666                 receive_data(ep);
1667         }
1668 }
1669
1670 static void usba_dma_irq(struct usba_udc *udc, struct usba_ep *ep)
1671 {
1672         struct usba_request *req;
1673         u32 status, control, pending;
1674
1675         status = usba_dma_readl(ep, STATUS);
1676         control = usba_dma_readl(ep, CONTROL);
1677 #ifdef CONFIG_USB_GADGET_DEBUG_FS
1678         ep->last_dma_status = status;
1679 #endif
1680         pending = status & control;
1681         DBG(DBG_INT | DBG_DMA, "dma irq, s/%#08x, c/%#08x\n", status, control);
1682
1683         if (status & USBA_DMA_CH_EN) {
1684                 dev_err(&udc->pdev->dev,
1685                         "DMA_CH_EN is set after transfer is finished!\n");
1686                 dev_err(&udc->pdev->dev,
1687                         "status=%#08x, pending=%#08x, control=%#08x\n",
1688                         status, pending, control);
1689
1690                 /*
1691                  * try to pretend nothing happened. We might have to
1692                  * do something here...
1693                  */
1694         }
1695
1696         if (list_empty(&ep->queue))
1697                 /* Might happen if a reset comes along at the right moment */
1698                 return;
1699
1700         if (pending & (USBA_DMA_END_TR_ST | USBA_DMA_END_BUF_ST)) {
1701                 req = list_entry(ep->queue.next, struct usba_request, queue);
1702                 usba_update_req(ep, req, status);
1703
1704                 list_del_init(&req->queue);
1705                 submit_next_request(ep);
1706                 request_complete(ep, req, 0);
1707         }
1708 }
1709
1710 static int start_clock(struct usba_udc *udc);
1711 static void stop_clock(struct usba_udc *udc);
1712
1713 static irqreturn_t usba_udc_irq(int irq, void *devid)
1714 {
1715         struct usba_udc *udc = devid;
1716         u32 status, int_enb;
1717         u32 dma_status;
1718         u32 ep_status;
1719
1720         spin_lock(&udc->lock);
1721
1722         int_enb = usba_int_enb_get(udc);
1723         status = usba_readl(udc, INT_STA) & (int_enb | USBA_HIGH_SPEED);
1724         DBG(DBG_INT, "irq, status=%#08x\n", status);
1725
1726         if (status & USBA_DET_SUSPEND) {
1727                 usba_writel(udc, INT_CLR, USBA_DET_SUSPEND|USBA_WAKE_UP);
1728                 usba_int_enb_set(udc, USBA_WAKE_UP);
1729                 usba_int_enb_clear(udc, USBA_DET_SUSPEND);
1730                 udc->suspended = true;
1731                 toggle_bias(udc, 0);
1732                 udc->bias_pulse_needed = true;
1733                 stop_clock(udc);
1734                 DBG(DBG_BUS, "Suspend detected\n");
1735                 if (udc->gadget.speed != USB_SPEED_UNKNOWN
1736                                 && udc->driver && udc->driver->suspend) {
1737                         spin_unlock(&udc->lock);
1738                         udc->driver->suspend(&udc->gadget);
1739                         spin_lock(&udc->lock);
1740                 }
1741         }
1742
1743         if (status & USBA_WAKE_UP) {
1744                 start_clock(udc);
1745                 toggle_bias(udc, 1);
1746                 usba_writel(udc, INT_CLR, USBA_WAKE_UP);
1747                 DBG(DBG_BUS, "Wake Up CPU detected\n");
1748         }
1749
1750         if (status & USBA_END_OF_RESUME) {
1751                 udc->suspended = false;
1752                 usba_writel(udc, INT_CLR, USBA_END_OF_RESUME);
1753                 usba_int_enb_clear(udc, USBA_WAKE_UP);
1754                 usba_int_enb_set(udc, USBA_DET_SUSPEND);
1755                 generate_bias_pulse(udc);
1756                 DBG(DBG_BUS, "Resume detected\n");
1757                 if (udc->gadget.speed != USB_SPEED_UNKNOWN
1758                                 && udc->driver && udc->driver->resume) {
1759                         spin_unlock(&udc->lock);
1760                         udc->driver->resume(&udc->gadget);
1761                         spin_lock(&udc->lock);
1762                 }
1763         }
1764
1765         dma_status = USBA_BFEXT(DMA_INT, status);
1766         if (dma_status) {
1767                 int i;
1768
1769                 usba_int_enb_set(udc, USBA_DET_SUSPEND);
1770
1771                 for (i = 1; i <= USBA_NR_DMAS; i++)
1772                         if (dma_status & (1 << i))
1773                                 usba_dma_irq(udc, &udc->usba_ep[i]);
1774         }
1775
1776         ep_status = USBA_BFEXT(EPT_INT, status);
1777         if (ep_status) {
1778                 int i;
1779
1780                 usba_int_enb_set(udc, USBA_DET_SUSPEND);
1781
1782                 for (i = 0; i < udc->num_ep; i++)
1783                         if (ep_status & (1 << i)) {
1784                                 if (ep_is_control(&udc->usba_ep[i]))
1785                                         usba_control_irq(udc, &udc->usba_ep[i]);
1786                                 else
1787                                         usba_ep_irq(udc, &udc->usba_ep[i]);
1788                         }
1789         }
1790
1791         if (status & USBA_END_OF_RESET) {
1792                 struct usba_ep *ep0, *ep;
1793                 int i;
1794
1795                 usba_writel(udc, INT_CLR,
1796                         USBA_END_OF_RESET|USBA_END_OF_RESUME
1797                         |USBA_DET_SUSPEND|USBA_WAKE_UP);
1798                 generate_bias_pulse(udc);
1799                 reset_all_endpoints(udc);
1800
1801                 if (udc->gadget.speed != USB_SPEED_UNKNOWN && udc->driver) {
1802                         udc->gadget.speed = USB_SPEED_UNKNOWN;
1803                         spin_unlock(&udc->lock);
1804                         usb_gadget_udc_reset(&udc->gadget, udc->driver);
1805                         spin_lock(&udc->lock);
1806                 }
1807
1808                 if (status & USBA_HIGH_SPEED)
1809                         udc->gadget.speed = USB_SPEED_HIGH;
1810                 else
1811                         udc->gadget.speed = USB_SPEED_FULL;
1812                 DBG(DBG_BUS, "%s bus reset detected\n",
1813                     usb_speed_string(udc->gadget.speed));
1814
1815                 ep0 = &udc->usba_ep[0];
1816                 ep0->ep.desc = &usba_ep0_desc;
1817                 ep0->state = WAIT_FOR_SETUP;
1818                 usba_ep_writel(ep0, CFG,
1819                                 (USBA_BF(EPT_SIZE, EP0_EPT_SIZE)
1820                                 | USBA_BF(EPT_TYPE, USBA_EPT_TYPE_CONTROL)
1821                                 | USBA_BF(BK_NUMBER, USBA_BK_NUMBER_ONE)));
1822                 usba_ep_writel(ep0, CTL_ENB,
1823                                 USBA_EPT_ENABLE | USBA_RX_SETUP);
1824
1825                 /* If we get reset while suspended... */
1826                 udc->suspended = false;
1827                 usba_int_enb_clear(udc, USBA_WAKE_UP);
1828
1829                 usba_int_enb_set(udc, USBA_BF(EPT_INT, 1) |
1830                                       USBA_DET_SUSPEND | USBA_END_OF_RESUME);
1831
1832                 /*
1833                  * Unclear why we hit this irregularly, e.g. in usbtest,
1834                  * but it's clearly harmless...
1835                  */
1836                 if (!(usba_ep_readl(ep0, CFG) & USBA_EPT_MAPPED))
1837                         dev_err(&udc->pdev->dev,
1838                                 "ODD: EP0 configuration is invalid!\n");
1839
1840                 /* Preallocate other endpoints */
1841                 for (i = 1; i < udc->num_ep; i++) {
1842                         ep = &udc->usba_ep[i];
1843                         if (ep->ep.claimed) {
1844                                 usba_ep_writel(ep, CFG, ep->ept_cfg);
1845                                 if (!(usba_ep_readl(ep, CFG) & USBA_EPT_MAPPED))
1846                                         dev_err(&udc->pdev->dev,
1847                                                 "ODD: EP%d configuration is invalid!\n", i);
1848                         }
1849                 }
1850         }
1851
1852         spin_unlock(&udc->lock);
1853
1854         return IRQ_HANDLED;
1855 }
1856
1857 static int start_clock(struct usba_udc *udc)
1858 {
1859         int ret;
1860
1861         if (udc->clocked)
1862                 return 0;
1863
1864         pm_stay_awake(&udc->pdev->dev);
1865
1866         ret = clk_prepare_enable(udc->pclk);
1867         if (ret)
1868                 return ret;
1869         ret = clk_prepare_enable(udc->hclk);
1870         if (ret) {
1871                 clk_disable_unprepare(udc->pclk);
1872                 return ret;
1873         }
1874
1875         udc->clocked = true;
1876         return 0;
1877 }
1878
1879 static void stop_clock(struct usba_udc *udc)
1880 {
1881         if (!udc->clocked)
1882                 return;
1883
1884         clk_disable_unprepare(udc->hclk);
1885         clk_disable_unprepare(udc->pclk);
1886
1887         udc->clocked = false;
1888
1889         pm_relax(&udc->pdev->dev);
1890 }
1891
1892 static int usba_start(struct usba_udc *udc)
1893 {
1894         unsigned long flags;
1895         int ret;
1896
1897         ret = start_clock(udc);
1898         if (ret)
1899                 return ret;
1900
1901         if (udc->suspended)
1902                 return 0;
1903
1904         spin_lock_irqsave(&udc->lock, flags);
1905         toggle_bias(udc, 1);
1906         usba_writel(udc, CTRL, USBA_ENABLE_MASK);
1907         /* Clear all requested and pending interrupts... */
1908         usba_writel(udc, INT_ENB, 0);
1909         udc->int_enb_cache = 0;
1910         usba_writel(udc, INT_CLR,
1911                 USBA_END_OF_RESET|USBA_END_OF_RESUME
1912                 |USBA_DET_SUSPEND|USBA_WAKE_UP);
1913         /* ...and enable just 'reset' IRQ to get us started */
1914         usba_int_enb_set(udc, USBA_END_OF_RESET);
1915         spin_unlock_irqrestore(&udc->lock, flags);
1916
1917         return 0;
1918 }
1919
1920 static void usba_stop(struct usba_udc *udc)
1921 {
1922         unsigned long flags;
1923
1924         if (udc->suspended)
1925                 return;
1926
1927         spin_lock_irqsave(&udc->lock, flags);
1928         udc->gadget.speed = USB_SPEED_UNKNOWN;
1929         reset_all_endpoints(udc);
1930
1931         /* This will also disable the DP pullup */
1932         toggle_bias(udc, 0);
1933         usba_writel(udc, CTRL, USBA_DISABLE_MASK);
1934         spin_unlock_irqrestore(&udc->lock, flags);
1935
1936         stop_clock(udc);
1937 }
1938
1939 static irqreturn_t usba_vbus_irq_thread(int irq, void *devid)
1940 {
1941         struct usba_udc *udc = devid;
1942         int vbus;
1943
1944         /* debounce */
1945         udelay(10);
1946
1947         mutex_lock(&udc->vbus_mutex);
1948
1949         vbus = vbus_is_present(udc);
1950         if (vbus != udc->vbus_prev) {
1951                 if (vbus) {
1952                         usba_start(udc);
1953                 } else {
1954                         udc->suspended = false;
1955                         if (udc->driver->disconnect)
1956                                 udc->driver->disconnect(&udc->gadget);
1957
1958                         usba_stop(udc);
1959                 }
1960                 udc->vbus_prev = vbus;
1961         }
1962
1963         mutex_unlock(&udc->vbus_mutex);
1964         return IRQ_HANDLED;
1965 }
1966
1967 static int atmel_usba_pullup(struct usb_gadget *gadget, int is_on)
1968 {
1969         struct usba_udc *udc = container_of(gadget, struct usba_udc, gadget);
1970         unsigned long flags;
1971         u32 ctrl;
1972
1973         spin_lock_irqsave(&udc->lock, flags);
1974         ctrl = usba_readl(udc, CTRL);
1975         if (is_on)
1976                 ctrl &= ~USBA_DETACH;
1977         else
1978                 ctrl |= USBA_DETACH;
1979         usba_writel(udc, CTRL, ctrl);
1980         spin_unlock_irqrestore(&udc->lock, flags);
1981
1982         return 0;
1983 }
1984
1985 static int atmel_usba_start(struct usb_gadget *gadget,
1986                 struct usb_gadget_driver *driver)
1987 {
1988         int ret;
1989         struct usba_udc *udc = container_of(gadget, struct usba_udc, gadget);
1990         unsigned long flags;
1991
1992         spin_lock_irqsave(&udc->lock, flags);
1993         udc->devstatus = 1 << USB_DEVICE_SELF_POWERED;
1994         udc->driver = driver;
1995         spin_unlock_irqrestore(&udc->lock, flags);
1996
1997         mutex_lock(&udc->vbus_mutex);
1998
1999         if (udc->vbus_pin)
2000                 enable_irq(gpiod_to_irq(udc->vbus_pin));
2001
2002         /* If Vbus is present, enable the controller and wait for reset */
2003         udc->vbus_prev = vbus_is_present(udc);
2004         if (udc->vbus_prev) {
2005                 ret = usba_start(udc);
2006                 if (ret)
2007                         goto err;
2008         }
2009
2010         mutex_unlock(&udc->vbus_mutex);
2011         return 0;
2012
2013 err:
2014         if (udc->vbus_pin)
2015                 disable_irq(gpiod_to_irq(udc->vbus_pin));
2016
2017         mutex_unlock(&udc->vbus_mutex);
2018
2019         spin_lock_irqsave(&udc->lock, flags);
2020         udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
2021         udc->driver = NULL;
2022         spin_unlock_irqrestore(&udc->lock, flags);
2023         return ret;
2024 }
2025
2026 static int atmel_usba_stop(struct usb_gadget *gadget)
2027 {
2028         struct usba_udc *udc = container_of(gadget, struct usba_udc, gadget);
2029
2030         if (udc->vbus_pin)
2031                 disable_irq(gpiod_to_irq(udc->vbus_pin));
2032
2033         udc->suspended = false;
2034         usba_stop(udc);
2035
2036         udc->driver = NULL;
2037
2038         return 0;
2039 }
2040
2041 static void at91sam9rl_toggle_bias(struct usba_udc *udc, int is_on)
2042 {
2043         regmap_update_bits(udc->pmc, AT91_CKGR_UCKR, AT91_PMC_BIASEN,
2044                            is_on ? AT91_PMC_BIASEN : 0);
2045 }
2046
2047 static void at91sam9g45_pulse_bias(struct usba_udc *udc)
2048 {
2049         regmap_update_bits(udc->pmc, AT91_CKGR_UCKR, AT91_PMC_BIASEN, 0);
2050         regmap_update_bits(udc->pmc, AT91_CKGR_UCKR, AT91_PMC_BIASEN,
2051                            AT91_PMC_BIASEN);
2052 }
2053
2054 static const struct usba_udc_errata at91sam9rl_errata = {
2055         .toggle_bias = at91sam9rl_toggle_bias,
2056 };
2057
2058 static const struct usba_udc_errata at91sam9g45_errata = {
2059         .pulse_bias = at91sam9g45_pulse_bias,
2060 };
2061
2062 static const struct usba_ep_config ep_config_sam9[] = {
2063         { .nr_banks = 1 },                              /* ep 0 */
2064         { .nr_banks = 2, .can_dma = 1, .can_isoc = 1 }, /* ep 1 */
2065         { .nr_banks = 2, .can_dma = 1, .can_isoc = 1 }, /* ep 2 */
2066         { .nr_banks = 3, .can_dma = 1 },                /* ep 3 */
2067         { .nr_banks = 3, .can_dma = 1 },                /* ep 4 */
2068         { .nr_banks = 3, .can_dma = 1, .can_isoc = 1 }, /* ep 5 */
2069         { .nr_banks = 3, .can_dma = 1, .can_isoc = 1 }, /* ep 6 */
2070 };
2071
2072 static const struct usba_ep_config ep_config_sama5[] = {
2073         { .nr_banks = 1 },                              /* ep 0 */
2074         { .nr_banks = 3, .can_dma = 1, .can_isoc = 1 }, /* ep 1 */
2075         { .nr_banks = 3, .can_dma = 1, .can_isoc = 1 }, /* ep 2 */
2076         { .nr_banks = 2, .can_dma = 1, .can_isoc = 1 }, /* ep 3 */
2077         { .nr_banks = 2, .can_dma = 1, .can_isoc = 1 }, /* ep 4 */
2078         { .nr_banks = 2, .can_dma = 1, .can_isoc = 1 }, /* ep 5 */
2079         { .nr_banks = 2, .can_dma = 1, .can_isoc = 1 }, /* ep 6 */
2080         { .nr_banks = 2, .can_dma = 1, .can_isoc = 1 }, /* ep 7 */
2081         { .nr_banks = 2, .can_isoc = 1 },               /* ep 8 */
2082         { .nr_banks = 2, .can_isoc = 1 },               /* ep 9 */
2083         { .nr_banks = 2, .can_isoc = 1 },               /* ep 10 */
2084         { .nr_banks = 2, .can_isoc = 1 },               /* ep 11 */
2085         { .nr_banks = 2, .can_isoc = 1 },               /* ep 12 */
2086         { .nr_banks = 2, .can_isoc = 1 },               /* ep 13 */
2087         { .nr_banks = 2, .can_isoc = 1 },               /* ep 14 */
2088         { .nr_banks = 2, .can_isoc = 1 },               /* ep 15 */
2089 };
2090
2091 static const struct usba_udc_config udc_at91sam9rl_cfg = {
2092         .errata = &at91sam9rl_errata,
2093         .config = ep_config_sam9,
2094         .num_ep = ARRAY_SIZE(ep_config_sam9),
2095         .ep_prealloc = true,
2096 };
2097
2098 static const struct usba_udc_config udc_at91sam9g45_cfg = {
2099         .errata = &at91sam9g45_errata,
2100         .config = ep_config_sam9,
2101         .num_ep = ARRAY_SIZE(ep_config_sam9),
2102         .ep_prealloc = true,
2103 };
2104
2105 static const struct usba_udc_config udc_sama5d3_cfg = {
2106         .config = ep_config_sama5,
2107         .num_ep = ARRAY_SIZE(ep_config_sama5),
2108         .ep_prealloc = true,
2109 };
2110
2111 static const struct usba_udc_config udc_sam9x60_cfg = {
2112         .num_ep = ARRAY_SIZE(ep_config_sam9),
2113         .config = ep_config_sam9,
2114         .ep_prealloc = false,
2115 };
2116
2117 static const struct of_device_id atmel_udc_dt_ids[] = {
2118         { .compatible = "atmel,at91sam9rl-udc", .data = &udc_at91sam9rl_cfg },
2119         { .compatible = "atmel,at91sam9g45-udc", .data = &udc_at91sam9g45_cfg },
2120         { .compatible = "atmel,sama5d3-udc", .data = &udc_sama5d3_cfg },
2121         { .compatible = "microchip,sam9x60-udc", .data = &udc_sam9x60_cfg },
2122         { /* sentinel */ }
2123 };
2124
2125 MODULE_DEVICE_TABLE(of, atmel_udc_dt_ids);
2126
2127 static const struct of_device_id atmel_pmc_dt_ids[] = {
2128         { .compatible = "atmel,at91sam9g45-pmc" },
2129         { .compatible = "atmel,at91sam9rl-pmc" },
2130         { .compatible = "atmel,at91sam9x5-pmc" },
2131         { /* sentinel */ }
2132 };
2133
2134 static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev,
2135                                                     struct usba_udc *udc)
2136 {
2137         struct device_node *np = pdev->dev.of_node;
2138         const struct of_device_id *match;
2139         struct device_node *pp;
2140         int i, ret;
2141         struct usba_ep *eps, *ep;
2142         const struct usba_udc_config *udc_config;
2143
2144         match = of_match_node(atmel_udc_dt_ids, np);
2145         if (!match)
2146                 return ERR_PTR(-EINVAL);
2147
2148         udc_config = match->data;
2149         udc->ep_prealloc = udc_config->ep_prealloc;
2150         udc->errata = udc_config->errata;
2151         if (udc->errata) {
2152                 pp = of_find_matching_node_and_match(NULL, atmel_pmc_dt_ids,
2153                                                      NULL);
2154                 if (!pp)
2155                         return ERR_PTR(-ENODEV);
2156
2157                 udc->pmc = syscon_node_to_regmap(pp);
2158                 of_node_put(pp);
2159                 if (IS_ERR(udc->pmc))
2160                         return ERR_CAST(udc->pmc);
2161         }
2162
2163         udc->num_ep = 0;
2164
2165         udc->vbus_pin = devm_gpiod_get_optional(&pdev->dev, "atmel,vbus",
2166                                                 GPIOD_IN);
2167         if (IS_ERR(udc->vbus_pin))
2168                 return ERR_CAST(udc->vbus_pin);
2169
2170         if (fifo_mode == 0) {
2171                 udc->num_ep = udc_config->num_ep;
2172         } else {
2173                 udc->num_ep = usba_config_fifo_table(udc);
2174         }
2175
2176         eps = devm_kcalloc(&pdev->dev, udc->num_ep, sizeof(struct usba_ep),
2177                            GFP_KERNEL);
2178         if (!eps)
2179                 return ERR_PTR(-ENOMEM);
2180
2181         udc->gadget.ep0 = &eps[0].ep;
2182
2183         INIT_LIST_HEAD(&eps[0].ep.ep_list);
2184
2185         i = 0;
2186         while (i < udc->num_ep) {
2187                 const struct usba_ep_config *ep_cfg = &udc_config->config[i];
2188
2189                 ep = &eps[i];
2190
2191                 ep->index = fifo_mode ? udc->fifo_cfg[i].hw_ep_num : i;
2192
2193                 /* Only the first EP is 64 bytes */
2194                 if (ep->index == 0)
2195                         ep->fifo_size = 64;
2196                 else
2197                         ep->fifo_size = 1024;
2198
2199                 if (fifo_mode) {
2200                         if (ep->fifo_size < udc->fifo_cfg[i].fifo_size)
2201                                 dev_warn(&pdev->dev,
2202                                          "Using default max fifo-size value\n");
2203                         else
2204                                 ep->fifo_size = udc->fifo_cfg[i].fifo_size;
2205                 }
2206
2207                 ep->nr_banks = ep_cfg->nr_banks;
2208                 if (fifo_mode) {
2209                         if (ep->nr_banks < udc->fifo_cfg[i].nr_banks)
2210                                 dev_warn(&pdev->dev,
2211                                          "Using default max nb-banks value\n");
2212                         else
2213                                 ep->nr_banks = udc->fifo_cfg[i].nr_banks;
2214                 }
2215
2216                 ep->can_dma = ep_cfg->can_dma;
2217                 ep->can_isoc = ep_cfg->can_isoc;
2218
2219                 sprintf(ep->name, "ep%d", ep->index);
2220                 ep->ep.name = ep->name;
2221
2222                 ep->ep_regs = udc->regs + USBA_EPT_BASE(i);
2223                 ep->dma_regs = udc->regs + USBA_DMA_BASE(i);
2224                 ep->fifo = udc->fifo + USBA_FIFO_BASE(i);
2225                 ep->ep.ops = &usba_ep_ops;
2226                 usb_ep_set_maxpacket_limit(&ep->ep, ep->fifo_size);
2227                 ep->udc = udc;
2228                 INIT_LIST_HEAD(&ep->queue);
2229
2230                 if (ep->index == 0) {
2231                         ep->ep.caps.type_control = true;
2232                 } else {
2233                         ep->ep.caps.type_iso = ep->can_isoc;
2234                         ep->ep.caps.type_bulk = true;
2235                         ep->ep.caps.type_int = true;
2236                 }
2237
2238                 ep->ep.caps.dir_in = true;
2239                 ep->ep.caps.dir_out = true;
2240
2241                 if (fifo_mode != 0) {
2242                         /*
2243                          * Generate ept_cfg based on FIFO size and
2244                          * banks number
2245                          */
2246                         if (ep->fifo_size  <= 8)
2247                                 ep->ept_cfg = USBA_BF(EPT_SIZE, USBA_EPT_SIZE_8);
2248                         else
2249                                 /* LSB is bit 1, not 0 */
2250                                 ep->ept_cfg =
2251                                   USBA_BF(EPT_SIZE, fls(ep->fifo_size - 1) - 3);
2252
2253                         ep->ept_cfg |= USBA_BF(BK_NUMBER, ep->nr_banks);
2254                 }
2255
2256                 if (i)
2257                         list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2258
2259                 i++;
2260         }
2261
2262         if (i == 0) {
2263                 dev_err(&pdev->dev, "of_probe: no endpoint specified\n");
2264                 ret = -EINVAL;
2265                 goto err;
2266         }
2267
2268         return eps;
2269 err:
2270         return ERR_PTR(ret);
2271 }
2272
2273 static int usba_udc_probe(struct platform_device *pdev)
2274 {
2275         struct resource *res;
2276         struct clk *pclk, *hclk;
2277         struct usba_udc *udc;
2278         int irq, ret, i;
2279
2280         udc = devm_kzalloc(&pdev->dev, sizeof(*udc), GFP_KERNEL);
2281         if (!udc)
2282                 return -ENOMEM;
2283
2284         udc->gadget = usba_gadget_template;
2285         INIT_LIST_HEAD(&udc->gadget.ep_list);
2286
2287         udc->regs = devm_platform_get_and_ioremap_resource(pdev, CTRL_IOMEM_ID, &res);
2288         if (IS_ERR(udc->regs))
2289                 return PTR_ERR(udc->regs);
2290         dev_info(&pdev->dev, "MMIO registers at %pR mapped at %p\n",
2291                  res, udc->regs);
2292
2293         udc->fifo = devm_platform_get_and_ioremap_resource(pdev, FIFO_IOMEM_ID, &res);
2294         if (IS_ERR(udc->fifo))
2295                 return PTR_ERR(udc->fifo);
2296         dev_info(&pdev->dev, "FIFO at %pR mapped at %p\n", res, udc->fifo);
2297
2298         irq = platform_get_irq(pdev, 0);
2299         if (irq < 0)
2300                 return irq;
2301
2302         pclk = devm_clk_get(&pdev->dev, "pclk");
2303         if (IS_ERR(pclk))
2304                 return PTR_ERR(pclk);
2305         hclk = devm_clk_get(&pdev->dev, "hclk");
2306         if (IS_ERR(hclk))
2307                 return PTR_ERR(hclk);
2308
2309         spin_lock_init(&udc->lock);
2310         mutex_init(&udc->vbus_mutex);
2311         udc->pdev = pdev;
2312         udc->pclk = pclk;
2313         udc->hclk = hclk;
2314
2315         platform_set_drvdata(pdev, udc);
2316
2317         /* Make sure we start from a clean slate */
2318         ret = clk_prepare_enable(pclk);
2319         if (ret) {
2320                 dev_err(&pdev->dev, "Unable to enable pclk, aborting.\n");
2321                 return ret;
2322         }
2323
2324         usba_writel(udc, CTRL, USBA_DISABLE_MASK);
2325         clk_disable_unprepare(pclk);
2326
2327         udc->usba_ep = atmel_udc_of_init(pdev, udc);
2328
2329         toggle_bias(udc, 0);
2330
2331         if (IS_ERR(udc->usba_ep))
2332                 return PTR_ERR(udc->usba_ep);
2333
2334         ret = devm_request_irq(&pdev->dev, irq, usba_udc_irq, 0,
2335                                 "atmel_usba_udc", udc);
2336         if (ret) {
2337                 dev_err(&pdev->dev, "Cannot request irq %d (error %d)\n",
2338                         irq, ret);
2339                 return ret;
2340         }
2341         udc->irq = irq;
2342
2343         if (udc->vbus_pin) {
2344                 irq_set_status_flags(gpiod_to_irq(udc->vbus_pin), IRQ_NOAUTOEN);
2345                 ret = devm_request_threaded_irq(&pdev->dev,
2346                                 gpiod_to_irq(udc->vbus_pin), NULL,
2347                                 usba_vbus_irq_thread, USBA_VBUS_IRQFLAGS,
2348                                 "atmel_usba_udc", udc);
2349                 if (ret) {
2350                         udc->vbus_pin = NULL;
2351                         dev_warn(&udc->pdev->dev,
2352                                  "failed to request vbus irq; "
2353                                  "assuming always on\n");
2354                 }
2355         }
2356
2357         ret = usb_add_gadget_udc(&pdev->dev, &udc->gadget);
2358         if (ret)
2359                 return ret;
2360         device_init_wakeup(&pdev->dev, 1);
2361
2362         usba_init_debugfs(udc);
2363         for (i = 1; i < udc->num_ep; i++)
2364                 usba_ep_init_debugfs(udc, &udc->usba_ep[i]);
2365
2366         return 0;
2367 }
2368
2369 static void usba_udc_remove(struct platform_device *pdev)
2370 {
2371         struct usba_udc *udc;
2372         int i;
2373
2374         udc = platform_get_drvdata(pdev);
2375
2376         device_init_wakeup(&pdev->dev, 0);
2377         usb_del_gadget_udc(&udc->gadget);
2378
2379         for (i = 1; i < udc->num_ep; i++)
2380                 usba_ep_cleanup_debugfs(&udc->usba_ep[i]);
2381         usba_cleanup_debugfs(udc);
2382 }
2383
2384 #ifdef CONFIG_PM_SLEEP
2385 static int usba_udc_suspend(struct device *dev)
2386 {
2387         struct usba_udc *udc = dev_get_drvdata(dev);
2388
2389         /* Not started */
2390         if (!udc->driver)
2391                 return 0;
2392
2393         mutex_lock(&udc->vbus_mutex);
2394
2395         if (!device_may_wakeup(dev)) {
2396                 udc->suspended = false;
2397                 usba_stop(udc);
2398                 goto out;
2399         }
2400
2401         /*
2402          * Device may wake up. We stay clocked if we failed
2403          * to request vbus irq, assuming always on.
2404          */
2405         if (udc->vbus_pin) {
2406                 /* FIXME: right to stop here...??? */
2407                 usba_stop(udc);
2408                 enable_irq_wake(gpiod_to_irq(udc->vbus_pin));
2409         }
2410
2411         enable_irq_wake(udc->irq);
2412
2413 out:
2414         mutex_unlock(&udc->vbus_mutex);
2415         return 0;
2416 }
2417
2418 static int usba_udc_resume(struct device *dev)
2419 {
2420         struct usba_udc *udc = dev_get_drvdata(dev);
2421
2422         /* Not started */
2423         if (!udc->driver)
2424                 return 0;
2425
2426         if (device_may_wakeup(dev)) {
2427                 if (udc->vbus_pin)
2428                         disable_irq_wake(gpiod_to_irq(udc->vbus_pin));
2429
2430                 disable_irq_wake(udc->irq);
2431         }
2432
2433         /* If Vbus is present, enable the controller and wait for reset */
2434         mutex_lock(&udc->vbus_mutex);
2435         udc->vbus_prev = vbus_is_present(udc);
2436         if (udc->vbus_prev)
2437                 usba_start(udc);
2438         mutex_unlock(&udc->vbus_mutex);
2439
2440         return 0;
2441 }
2442 #endif
2443
2444 static SIMPLE_DEV_PM_OPS(usba_udc_pm_ops, usba_udc_suspend, usba_udc_resume);
2445
2446 static struct platform_driver udc_driver = {
2447         .probe          = usba_udc_probe,
2448         .remove_new     = usba_udc_remove,
2449         .driver         = {
2450                 .name           = "atmel_usba_udc",
2451                 .pm             = &usba_udc_pm_ops,
2452                 .of_match_table = atmel_udc_dt_ids,
2453         },
2454 };
2455 module_platform_driver(udc_driver);
2456
2457 MODULE_DESCRIPTION("Atmel USBA UDC driver");
2458 MODULE_AUTHOR("Haavard Skinnemoen (Atmel)");
2459 MODULE_LICENSE("GPL");
2460 MODULE_ALIAS("platform:atmel_usba_udc");