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