1/* 2 * Driver for PLX NET2272 USB device controller 3 * 4 * Copyright (C) 2005-2006 PLX Technology, Inc. 5 * Copyright (C) 2006-2011 Analog Devices, Inc. 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 */ 21 22#include <linux/delay.h> 23#include <linux/device.h> 24#include <linux/errno.h> 25#include <linux/gpio.h> 26#include <linux/init.h> 27#include <linux/interrupt.h> 28#include <linux/io.h> 29#include <linux/ioport.h> 30#include <linux/kernel.h> 31#include <linux/list.h> 32#include <linux/module.h> 33#include <linux/moduleparam.h> 34#include <linux/pci.h> 35#include <linux/platform_device.h> 36#include <linux/prefetch.h> 37#include <linux/sched.h> 38#include <linux/slab.h> 39#include <linux/timer.h> 40#include <linux/usb.h> 41#include <linux/usb/ch9.h> 42#include <linux/usb/gadget.h> 43 44#include <asm/byteorder.h> 45#include <asm/unaligned.h> 46 47#include "net2272.h" 48 49#define DRIVER_DESC "PLX NET2272 USB Peripheral Controller" 50 51static const char driver_name[] = "net2272"; 52static const char driver_vers[] = "2006 October 17/mainline"; 53static const char driver_desc[] = DRIVER_DESC; 54 55static const char ep0name[] = "ep0"; 56static const char * const ep_name[] = { 57 ep0name, 58 "ep-a", "ep-b", "ep-c", 59}; 60 61#ifdef CONFIG_USB_NET2272_DMA 62/* 63 * use_dma: the NET2272 can use an external DMA controller. 64 * Note that since there is no generic DMA api, some functions, 65 * notably request_dma, start_dma, and cancel_dma will need to be 66 * modified for your platform's particular dma controller. 67 * 68 * If use_dma is disabled, pio will be used instead. 69 */ 70static bool use_dma = 0; 71module_param(use_dma, bool, 0644); 72 73/* 74 * dma_ep: selects the endpoint for use with dma (1=ep-a, 2=ep-b) 75 * The NET2272 can only use dma for a single endpoint at a time. 76 * At some point this could be modified to allow either endpoint 77 * to take control of dma as it becomes available. 78 * 79 * Note that DMA should not be used on OUT endpoints unless it can 80 * be guaranteed that no short packets will arrive on an IN endpoint 81 * while the DMA operation is pending. Otherwise the OUT DMA will 82 * terminate prematurely (See NET2272 Errata 630-0213-0101) 83 */ 84static ushort dma_ep = 1; 85module_param(dma_ep, ushort, 0644); 86 87/* 88 * dma_mode: net2272 dma mode setting (see LOCCTL1 definiton): 89 * mode 0 == Slow DREQ mode 90 * mode 1 == Fast DREQ mode 91 * mode 2 == Burst mode 92 */ 93static ushort dma_mode = 2; 94module_param(dma_mode, ushort, 0644); 95#else 96#define use_dma 0 97#define dma_ep 1 98#define dma_mode 2 99#endif 100 101/* 102 * fifo_mode: net2272 buffer configuration: 103 * mode 0 == ep-{a,b,c} 512db each 104 * mode 1 == ep-a 1k, ep-{b,c} 512db 105 * mode 2 == ep-a 1k, ep-b 1k, ep-c 512db 106 * mode 3 == ep-a 1k, ep-b disabled, ep-c 512db 107 */ 108static ushort fifo_mode = 0; 109module_param(fifo_mode, ushort, 0644); 110 111/* 112 * enable_suspend: When enabled, the driver will respond to 113 * USB suspend requests by powering down the NET2272. Otherwise, 114 * USB suspend requests will be ignored. This is acceptible for 115 * self-powered devices. For bus powered devices set this to 1. 116 */ 117static ushort enable_suspend = 0; 118module_param(enable_suspend, ushort, 0644); 119 120static void assert_out_naking(struct net2272_ep *ep, const char *where) 121{ 122 u8 tmp; 123 124#ifndef DEBUG 125 return; 126#endif 127 128 tmp = net2272_ep_read(ep, EP_STAT0); 129 if ((tmp & (1 << NAK_OUT_PACKETS)) == 0) { 130 dev_dbg(ep->dev->dev, "%s %s %02x !NAK\n", 131 ep->ep.name, where, tmp); 132 net2272_ep_write(ep, EP_RSPSET, 1 << ALT_NAK_OUT_PACKETS); 133 } 134} 135#define ASSERT_OUT_NAKING(ep) assert_out_naking(ep, __func__) 136 137static void stop_out_naking(struct net2272_ep *ep) 138{ 139 u8 tmp = net2272_ep_read(ep, EP_STAT0); 140 141 if ((tmp & (1 << NAK_OUT_PACKETS)) != 0) 142 net2272_ep_write(ep, EP_RSPCLR, 1 << ALT_NAK_OUT_PACKETS); 143} 144 145#define PIPEDIR(bAddress) (usb_pipein(bAddress) ? "in" : "out") 146 147static char *type_string(u8 bmAttributes) 148{ 149 switch ((bmAttributes) & USB_ENDPOINT_XFERTYPE_MASK) { 150 case USB_ENDPOINT_XFER_BULK: return "bulk"; 151 case USB_ENDPOINT_XFER_ISOC: return "iso"; 152 case USB_ENDPOINT_XFER_INT: return "intr"; 153 default: return "control"; 154 } 155} 156 157static char *buf_state_string(unsigned state) 158{ 159 switch (state) { 160 case BUFF_FREE: return "free"; 161 case BUFF_VALID: return "valid"; 162 case BUFF_LCL: return "local"; 163 case BUFF_USB: return "usb"; 164 default: return "unknown"; 165 } 166} 167 168static char *dma_mode_string(void) 169{ 170 if (!use_dma) 171 return "PIO"; 172 switch (dma_mode) { 173 case 0: return "SLOW DREQ"; 174 case 1: return "FAST DREQ"; 175 case 2: return "BURST"; 176 default: return "invalid"; 177 } 178} 179 180static void net2272_dequeue_all(struct net2272_ep *); 181static int net2272_kick_dma(struct net2272_ep *, struct net2272_request *); 182static int net2272_fifo_status(struct usb_ep *); 183 184static struct usb_ep_ops net2272_ep_ops; 185 186/*---------------------------------------------------------------------------*/ 187 188static int 189net2272_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) 190{ 191 struct net2272 *dev; 192 struct net2272_ep *ep; 193 u32 max; 194 u8 tmp; 195 unsigned long flags; 196 197 ep = container_of(_ep, struct net2272_ep, ep); 198 if (!_ep || !desc || ep->desc || _ep->name == ep0name 199 || desc->bDescriptorType != USB_DT_ENDPOINT) 200 return -EINVAL; 201 dev = ep->dev; 202 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) 203 return -ESHUTDOWN; 204 205 max = usb_endpoint_maxp(desc) & 0x1fff; 206 207 spin_lock_irqsave(&dev->lock, flags); 208 _ep->maxpacket = max & 0x7fff; 209 ep->desc = desc; 210 211 /* net2272_ep_reset() has already been called */ 212 ep->stopped = 0; 213 ep->wedged = 0; 214 215 /* set speed-dependent max packet */ 216 net2272_ep_write(ep, EP_MAXPKT0, max & 0xff); 217 net2272_ep_write(ep, EP_MAXPKT1, (max & 0xff00) >> 8); 218 219 /* set type, direction, address; reset fifo counters */ 220 net2272_ep_write(ep, EP_STAT1, 1 << BUFFER_FLUSH); 221 tmp = usb_endpoint_type(desc); 222 if (usb_endpoint_xfer_bulk(desc)) { 223 /* catch some particularly blatant driver bugs */ 224 if ((dev->gadget.speed == USB_SPEED_HIGH && max != 512) || 225 (dev->gadget.speed == USB_SPEED_FULL && max > 64)) { 226 spin_unlock_irqrestore(&dev->lock, flags); 227 return -ERANGE; 228 } 229 } 230 ep->is_iso = usb_endpoint_xfer_isoc(desc) ? 1 : 0; 231 tmp <<= ENDPOINT_TYPE; 232 tmp |= ((desc->bEndpointAddress & 0x0f) << ENDPOINT_NUMBER); 233 tmp |= usb_endpoint_dir_in(desc) << ENDPOINT_DIRECTION; 234 tmp |= (1 << ENDPOINT_ENABLE); 235 236 /* for OUT transfers, block the rx fifo until a read is posted */ 237 ep->is_in = usb_endpoint_dir_in(desc); 238 if (!ep->is_in) 239 net2272_ep_write(ep, EP_RSPSET, 1 << ALT_NAK_OUT_PACKETS); 240 241 net2272_ep_write(ep, EP_CFG, tmp); 242 243 /* enable irqs */ 244 tmp = (1 << ep->num) | net2272_read(dev, IRQENB0); 245 net2272_write(dev, IRQENB0, tmp); 246 247 tmp = (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE) 248 | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE) 249 | net2272_ep_read(ep, EP_IRQENB); 250 net2272_ep_write(ep, EP_IRQENB, tmp); 251 252 tmp = desc->bEndpointAddress; 253 dev_dbg(dev->dev, "enabled %s (ep%d%s-%s) max %04x cfg %02x\n", 254 _ep->name, tmp & 0x0f, PIPEDIR(tmp), 255 type_string(desc->bmAttributes), max, 256 net2272_ep_read(ep, EP_CFG)); 257 258 spin_unlock_irqrestore(&dev->lock, flags); 259 return 0; 260} 261 262static void net2272_ep_reset(struct net2272_ep *ep) 263{ 264 u8 tmp; 265 266 ep->desc = NULL; 267 INIT_LIST_HEAD(&ep->queue); 268 269 usb_ep_set_maxpacket_limit(&ep->ep, ~0); 270 ep->ep.ops = &net2272_ep_ops; 271 272 /* disable irqs, endpoint */ 273 net2272_ep_write(ep, EP_IRQENB, 0); 274 275 /* init to our chosen defaults, notably so that we NAK OUT 276 * packets until the driver queues a read. 277 */ 278 tmp = (1 << NAK_OUT_PACKETS_MODE) | (1 << ALT_NAK_OUT_PACKETS); 279 net2272_ep_write(ep, EP_RSPSET, tmp); 280 281 tmp = (1 << INTERRUPT_MODE) | (1 << HIDE_STATUS_PHASE); 282 if (ep->num != 0) 283 tmp |= (1 << ENDPOINT_TOGGLE) | (1 << ENDPOINT_HALT); 284 285 net2272_ep_write(ep, EP_RSPCLR, tmp); 286 287 /* scrub most status bits, and flush any fifo state */ 288 net2272_ep_write(ep, EP_STAT0, 289 (1 << DATA_IN_TOKEN_INTERRUPT) 290 | (1 << DATA_OUT_TOKEN_INTERRUPT) 291 | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT) 292 | (1 << DATA_PACKET_RECEIVED_INTERRUPT) 293 | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)); 294 295 net2272_ep_write(ep, EP_STAT1, 296 (1 << TIMEOUT) 297 | (1 << USB_OUT_ACK_SENT) 298 | (1 << USB_OUT_NAK_SENT) 299 | (1 << USB_IN_ACK_RCVD) 300 | (1 << USB_IN_NAK_SENT) 301 | (1 << USB_STALL_SENT) 302 | (1 << LOCAL_OUT_ZLP) 303 | (1 << BUFFER_FLUSH)); 304 305 /* fifo size is handled seperately */ 306} 307 308static int net2272_disable(struct usb_ep *_ep) 309{ 310 struct net2272_ep *ep; 311 unsigned long flags; 312 313 ep = container_of(_ep, struct net2272_ep, ep); 314 if (!_ep || !ep->desc || _ep->name == ep0name) 315 return -EINVAL; 316 317 spin_lock_irqsave(&ep->dev->lock, flags); 318 net2272_dequeue_all(ep); 319 net2272_ep_reset(ep); 320 321 dev_vdbg(ep->dev->dev, "disabled %s\n", _ep->name); 322 323 spin_unlock_irqrestore(&ep->dev->lock, flags); 324 return 0; 325} 326 327/*---------------------------------------------------------------------------*/ 328 329static struct usb_request * 330net2272_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) 331{ 332 struct net2272_ep *ep; 333 struct net2272_request *req; 334 335 if (!_ep) 336 return NULL; 337 ep = container_of(_ep, struct net2272_ep, ep); 338 339 req = kzalloc(sizeof(*req), gfp_flags); 340 if (!req) 341 return NULL; 342 343 INIT_LIST_HEAD(&req->queue); 344 345 return &req->req; 346} 347 348static void 349net2272_free_request(struct usb_ep *_ep, struct usb_request *_req) 350{ 351 struct net2272_ep *ep; 352 struct net2272_request *req; 353 354 ep = container_of(_ep, struct net2272_ep, ep); 355 if (!_ep || !_req) 356 return; 357 358 req = container_of(_req, struct net2272_request, req); 359 WARN_ON(!list_empty(&req->queue)); 360 kfree(req); 361} 362 363static void 364net2272_done(struct net2272_ep *ep, struct net2272_request *req, int status) 365{ 366 struct net2272 *dev; 367 unsigned stopped = ep->stopped; 368 369 if (ep->num == 0) { 370 if (ep->dev->protocol_stall) { 371 ep->stopped = 1; 372 set_halt(ep); 373 } 374 allow_status(ep); 375 } 376 377 list_del_init(&req->queue); 378 379 if (req->req.status == -EINPROGRESS) 380 req->req.status = status; 381 else 382 status = req->req.status; 383 384 dev = ep->dev; 385 if (use_dma && ep->dma) 386 usb_gadget_unmap_request(&dev->gadget, &req->req, 387 ep->is_in); 388 389 if (status && status != -ESHUTDOWN) 390 dev_vdbg(dev->dev, "complete %s req %p stat %d len %u/%u buf %p\n", 391 ep->ep.name, &req->req, status, 392 req->req.actual, req->req.length, req->req.buf); 393 394 /* don't modify queue heads during completion callback */ 395 ep->stopped = 1; 396 spin_unlock(&dev->lock); 397 usb_gadget_giveback_request(&ep->ep, &req->req); 398 spin_lock(&dev->lock); 399 ep->stopped = stopped; 400} 401 402static int 403net2272_write_packet(struct net2272_ep *ep, u8 *buf, 404 struct net2272_request *req, unsigned max) 405{ 406 u16 __iomem *ep_data = net2272_reg_addr(ep->dev, EP_DATA); 407 u16 *bufp; 408 unsigned length, count; 409 u8 tmp; 410 411 length = min(req->req.length - req->req.actual, max); 412 req->req.actual += length; 413 414 dev_vdbg(ep->dev->dev, "write packet %s req %p max %u len %u avail %u\n", 415 ep->ep.name, req, max, length, 416 (net2272_ep_read(ep, EP_AVAIL1) << 8) | net2272_ep_read(ep, EP_AVAIL0)); 417 418 count = length; 419 bufp = (u16 *)buf; 420 421 while (likely(count >= 2)) { 422 /* no byte-swap required; chip endian set during init */ 423 writew(*bufp++, ep_data); 424 count -= 2; 425 } 426 buf = (u8 *)bufp; 427 428 /* write final byte by placing the NET2272 into 8-bit mode */ 429 if (unlikely(count)) { 430 tmp = net2272_read(ep->dev, LOCCTL); 431 net2272_write(ep->dev, LOCCTL, tmp & ~(1 << DATA_WIDTH)); 432 writeb(*buf, ep_data); 433 net2272_write(ep->dev, LOCCTL, tmp); 434 } 435 return length; 436} 437 438/* returns: 0: still running, 1: completed, negative: errno */ 439static int 440net2272_write_fifo(struct net2272_ep *ep, struct net2272_request *req) 441{ 442 u8 *buf; 443 unsigned count, max; 444 int status; 445 446 dev_vdbg(ep->dev->dev, "write_fifo %s actual %d len %d\n", 447 ep->ep.name, req->req.actual, req->req.length); 448 449 /* 450 * Keep loading the endpoint until the final packet is loaded, 451 * or the endpoint buffer is full. 452 */ 453 top: 454 /* 455 * Clear interrupt status 456 * - Packet Transmitted interrupt will become set again when the 457 * host successfully takes another packet 458 */ 459 net2272_ep_write(ep, EP_STAT0, (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)); 460 while (!(net2272_ep_read(ep, EP_STAT0) & (1 << BUFFER_FULL))) { 461 buf = req->req.buf + req->req.actual; 462 prefetch(buf); 463 464 /* force pagesel */ 465 net2272_ep_read(ep, EP_STAT0); 466 467 max = (net2272_ep_read(ep, EP_AVAIL1) << 8) | 468 (net2272_ep_read(ep, EP_AVAIL0)); 469 470 if (max < ep->ep.maxpacket) 471 max = (net2272_ep_read(ep, EP_AVAIL1) << 8) 472 | (net2272_ep_read(ep, EP_AVAIL0)); 473 474 count = net2272_write_packet(ep, buf, req, max); 475 /* see if we are done */ 476 if (req->req.length == req->req.actual) { 477 /* validate short or zlp packet */ 478 if (count < ep->ep.maxpacket) 479 set_fifo_bytecount(ep, 0); 480 net2272_done(ep, req, 0); 481 482 if (!list_empty(&ep->queue)) { 483 req = list_entry(ep->queue.next, 484 struct net2272_request, 485 queue); 486 status = net2272_kick_dma(ep, req); 487 488 if (status < 0) 489 if ((net2272_ep_read(ep, EP_STAT0) 490 & (1 << BUFFER_EMPTY))) 491 goto top; 492 } 493 return 1; 494 } 495 net2272_ep_write(ep, EP_STAT0, (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)); 496 } 497 return 0; 498} 499 500static void 501net2272_out_flush(struct net2272_ep *ep) 502{ 503 ASSERT_OUT_NAKING(ep); 504 505 net2272_ep_write(ep, EP_STAT0, (1 << DATA_OUT_TOKEN_INTERRUPT) 506 | (1 << DATA_PACKET_RECEIVED_INTERRUPT)); 507 net2272_ep_write(ep, EP_STAT1, 1 << BUFFER_FLUSH); 508} 509 510static int 511net2272_read_packet(struct net2272_ep *ep, u8 *buf, 512 struct net2272_request *req, unsigned avail) 513{ 514 u16 __iomem *ep_data = net2272_reg_addr(ep->dev, EP_DATA); 515 unsigned is_short; 516 u16 *bufp; 517 518 req->req.actual += avail; 519 520 dev_vdbg(ep->dev->dev, "read packet %s req %p len %u avail %u\n", 521 ep->ep.name, req, avail, 522 (net2272_ep_read(ep, EP_AVAIL1) << 8) | net2272_ep_read(ep, EP_AVAIL0)); 523 524 is_short = (avail < ep->ep.maxpacket); 525 526 if (unlikely(avail == 0)) { 527 /* remove any zlp from the buffer */ 528 (void)readw(ep_data); 529 return is_short; 530 } 531 532 /* Ensure we get the final byte */ 533 if (unlikely(avail % 2)) 534 avail++; 535 bufp = (u16 *)buf; 536 537 do { 538 *bufp++ = readw(ep_data); 539 avail -= 2; 540 } while (avail); 541 542 /* 543 * To avoid false endpoint available race condition must read 544 * ep stat0 twice in the case of a short transfer 545 */ 546 if (net2272_ep_read(ep, EP_STAT0) & (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)) 547 net2272_ep_read(ep, EP_STAT0); 548 549 return is_short; 550} 551 552static int 553net2272_read_fifo(struct net2272_ep *ep, struct net2272_request *req) 554{ 555 u8 *buf; 556 unsigned is_short; 557 int count; 558 int tmp; 559 int cleanup = 0; 560 int status = -1; 561 562 dev_vdbg(ep->dev->dev, "read_fifo %s actual %d len %d\n", 563 ep->ep.name, req->req.actual, req->req.length); 564 565 top: 566 do { 567 buf = req->req.buf + req->req.actual; 568 prefetchw(buf); 569 570 count = (net2272_ep_read(ep, EP_AVAIL1) << 8) 571 | net2272_ep_read(ep, EP_AVAIL0); 572 573 net2272_ep_write(ep, EP_STAT0, 574 (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT) | 575 (1 << DATA_PACKET_RECEIVED_INTERRUPT)); 576 577 tmp = req->req.length - req->req.actual; 578 579 if (count > tmp) { 580 if ((tmp % ep->ep.maxpacket) != 0) { 581 dev_err(ep->dev->dev, 582 "%s out fifo %d bytes, expected %d\n", 583 ep->ep.name, count, tmp); 584 cleanup = 1; 585 } 586 count = (tmp > 0) ? tmp : 0; 587 } 588 589 is_short = net2272_read_packet(ep, buf, req, count); 590 591 /* completion */ 592 if (unlikely(cleanup || is_short || 593 ((req->req.actual == req->req.length) 594 && !req->req.zero))) { 595 596 if (cleanup) { 597 net2272_out_flush(ep); 598 net2272_done(ep, req, -EOVERFLOW); 599 } else 600 net2272_done(ep, req, 0); 601 602 /* re-initialize endpoint transfer registers 603 * otherwise they may result in erroneous pre-validation 604 * for subsequent control reads 605 */ 606 if (unlikely(ep->num == 0)) { 607 net2272_ep_write(ep, EP_TRANSFER2, 0); 608 net2272_ep_write(ep, EP_TRANSFER1, 0); 609 net2272_ep_write(ep, EP_TRANSFER0, 0); 610 } 611 612 if (!list_empty(&ep->queue)) { 613 req = list_entry(ep->queue.next, 614 struct net2272_request, queue); 615 status = net2272_kick_dma(ep, req); 616 if ((status < 0) && 617 !(net2272_ep_read(ep, EP_STAT0) & (1 << BUFFER_EMPTY))) 618 goto top; 619 } 620 return 1; 621 } 622 } while (!(net2272_ep_read(ep, EP_STAT0) & (1 << BUFFER_EMPTY))); 623 624 return 0; 625} 626 627static void 628net2272_pio_advance(struct net2272_ep *ep) 629{ 630 struct net2272_request *req; 631 632 if (unlikely(list_empty(&ep->queue))) 633 return; 634 635 req = list_entry(ep->queue.next, struct net2272_request, queue); 636 (ep->is_in ? net2272_write_fifo : net2272_read_fifo)(ep, req); 637} 638 639/* returns 0 on success, else negative errno */ 640static int 641net2272_request_dma(struct net2272 *dev, unsigned ep, u32 buf, 642 unsigned len, unsigned dir) 643{ 644 dev_vdbg(dev->dev, "request_dma ep %d buf %08x len %d dir %d\n", 645 ep, buf, len, dir); 646 647 /* The NET2272 only supports a single dma channel */ 648 if (dev->dma_busy) 649 return -EBUSY; 650 /* 651 * EP_TRANSFER (used to determine the number of bytes received 652 * in an OUT transfer) is 24 bits wide; don't ask for more than that. 653 */ 654 if ((dir == 1) && (len > 0x1000000)) 655 return -EINVAL; 656 657 dev->dma_busy = 1; 658 659 /* initialize platform's dma */ 660#ifdef CONFIG_PCI 661 /* NET2272 addr, buffer addr, length, etc. */ 662 switch (dev->dev_id) { 663 case PCI_DEVICE_ID_RDK1: 664 /* Setup PLX 9054 DMA mode */ 665 writel((1 << LOCAL_BUS_WIDTH) | 666 (1 << TA_READY_INPUT_ENABLE) | 667 (0 << LOCAL_BURST_ENABLE) | 668 (1 << DONE_INTERRUPT_ENABLE) | 669 (1 << LOCAL_ADDRESSING_MODE) | 670 (1 << DEMAND_MODE) | 671 (1 << DMA_EOT_ENABLE) | 672 (1 << FAST_SLOW_TERMINATE_MODE_SELECT) | 673 (1 << DMA_CHANNEL_INTERRUPT_SELECT), 674 dev->rdk1.plx9054_base_addr + DMAMODE0); 675 676 writel(0x100000, dev->rdk1.plx9054_base_addr + DMALADR0); 677 writel(buf, dev->rdk1.plx9054_base_addr + DMAPADR0); 678 writel(len, dev->rdk1.plx9054_base_addr + DMASIZ0); 679 writel((dir << DIRECTION_OF_TRANSFER) | 680 (1 << INTERRUPT_AFTER_TERMINAL_COUNT), 681 dev->rdk1.plx9054_base_addr + DMADPR0); 682 writel((1 << LOCAL_DMA_CHANNEL_0_INTERRUPT_ENABLE) | 683 readl(dev->rdk1.plx9054_base_addr + INTCSR), 684 dev->rdk1.plx9054_base_addr + INTCSR); 685 686 break; 687 } 688#endif 689 690 net2272_write(dev, DMAREQ, 691 (0 << DMA_BUFFER_VALID) | 692 (1 << DMA_REQUEST_ENABLE) | 693 (1 << DMA_CONTROL_DACK) | 694 (dev->dma_eot_polarity << EOT_POLARITY) | 695 (dev->dma_dack_polarity << DACK_POLARITY) | 696 (dev->dma_dreq_polarity << DREQ_POLARITY) | 697 ((ep >> 1) << DMA_ENDPOINT_SELECT)); 698 699 (void) net2272_read(dev, SCRATCH); 700 701 return 0; 702} 703 704static void 705net2272_start_dma(struct net2272 *dev) 706{ 707 /* start platform's dma controller */ 708#ifdef CONFIG_PCI 709 switch (dev->dev_id) { 710 case PCI_DEVICE_ID_RDK1: 711 writeb((1 << CHANNEL_ENABLE) | (1 << CHANNEL_START), 712 dev->rdk1.plx9054_base_addr + DMACSR0); 713 break; 714 } 715#endif 716} 717 718/* returns 0 on success, else negative errno */ 719static int 720net2272_kick_dma(struct net2272_ep *ep, struct net2272_request *req) 721{ 722 unsigned size; 723 u8 tmp; 724 725 if (!use_dma || (ep->num < 1) || (ep->num > 2) || !ep->dma) 726 return -EINVAL; 727 728 /* don't use dma for odd-length transfers 729 * otherwise, we'd need to deal with the last byte with pio 730 */ 731 if (req->req.length & 1) 732 return -EINVAL; 733 734 dev_vdbg(ep->dev->dev, "kick_dma %s req %p dma %08llx\n", 735 ep->ep.name, req, (unsigned long long) req->req.dma); 736 737 net2272_ep_write(ep, EP_RSPSET, 1 << ALT_NAK_OUT_PACKETS); 738 739 /* The NET2272 can only use DMA on one endpoint at a time */ 740 if (ep->dev->dma_busy) 741 return -EBUSY; 742 743 /* Make sure we only DMA an even number of bytes (we'll use 744 * pio to complete the transfer) 745 */ 746 size = req->req.length; 747 size &= ~1; 748 749 /* device-to-host transfer */ 750 if (ep->is_in) { 751 /* initialize platform's dma controller */ 752 if (net2272_request_dma(ep->dev, ep->num, req->req.dma, size, 0)) 753 /* unable to obtain DMA channel; return error and use pio mode */ 754 return -EBUSY; 755 req->req.actual += size; 756 757 /* host-to-device transfer */ 758 } else { 759 tmp = net2272_ep_read(ep, EP_STAT0); 760 761 /* initialize platform's dma controller */ 762 if (net2272_request_dma(ep->dev, ep->num, req->req.dma, size, 1)) 763 /* unable to obtain DMA channel; return error and use pio mode */ 764 return -EBUSY; 765 766 if (!(tmp & (1 << BUFFER_EMPTY))) 767 ep->not_empty = 1; 768 else 769 ep->not_empty = 0; 770 771 772 /* allow the endpoint's buffer to fill */ 773 net2272_ep_write(ep, EP_RSPCLR, 1 << ALT_NAK_OUT_PACKETS); 774 775 /* this transfer completed and data's already in the fifo 776 * return error so pio gets used. 777 */ 778 if (tmp & (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)) { 779 780 /* deassert dreq */ 781 net2272_write(ep->dev, DMAREQ, 782 (0 << DMA_BUFFER_VALID) | 783 (0 << DMA_REQUEST_ENABLE) | 784 (1 << DMA_CONTROL_DACK) | 785 (ep->dev->dma_eot_polarity << EOT_POLARITY) | 786 (ep->dev->dma_dack_polarity << DACK_POLARITY) | 787 (ep->dev->dma_dreq_polarity << DREQ_POLARITY) | 788 ((ep->num >> 1) << DMA_ENDPOINT_SELECT)); 789 790 return -EBUSY; 791 } 792 } 793 794 /* Don't use per-packet interrupts: use dma interrupts only */ 795 net2272_ep_write(ep, EP_IRQENB, 0); 796 797 net2272_start_dma(ep->dev); 798 799 return 0; 800} 801 802static void net2272_cancel_dma(struct net2272 *dev) 803{ 804#ifdef CONFIG_PCI 805 switch (dev->dev_id) { 806 case PCI_DEVICE_ID_RDK1: 807 writeb(0, dev->rdk1.plx9054_base_addr + DMACSR0); 808 writeb(1 << CHANNEL_ABORT, dev->rdk1.plx9054_base_addr + DMACSR0); 809 while (!(readb(dev->rdk1.plx9054_base_addr + DMACSR0) & 810 (1 << CHANNEL_DONE))) 811 continue; /* wait for dma to stabalize */ 812 813 /* dma abort generates an interrupt */ 814 writeb(1 << CHANNEL_CLEAR_INTERRUPT, 815 dev->rdk1.plx9054_base_addr + DMACSR0); 816 break; 817 } 818#endif 819 820 dev->dma_busy = 0; 821} 822 823/*---------------------------------------------------------------------------*/ 824 825static int 826net2272_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) 827{ 828 struct net2272_request *req; 829 struct net2272_ep *ep; 830 struct net2272 *dev; 831 unsigned long flags; 832 int status = -1; 833 u8 s; 834 835 req = container_of(_req, struct net2272_request, req); 836 if (!_req || !_req->complete || !_req->buf 837 || !list_empty(&req->queue)) 838 return -EINVAL; 839 ep = container_of(_ep, struct net2272_ep, ep); 840 if (!_ep || (!ep->desc && ep->num != 0)) 841 return -EINVAL; 842 dev = ep->dev; 843 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) 844 return -ESHUTDOWN; 845 846 /* set up dma mapping in case the caller didn't */ 847 if (use_dma && ep->dma) { 848 status = usb_gadget_map_request(&dev->gadget, _req, 849 ep->is_in); 850 if (status) 851 return status; 852 } 853 854 dev_vdbg(dev->dev, "%s queue req %p, len %d buf %p dma %08llx %s\n", 855 _ep->name, _req, _req->length, _req->buf, 856 (unsigned long long) _req->dma, _req->zero ? "zero" : "!zero"); 857 858 spin_lock_irqsave(&dev->lock, flags); 859 860 _req->status = -EINPROGRESS; 861 _req->actual = 0; 862 863 /* kickstart this i/o queue? */ 864 if (list_empty(&ep->queue) && !ep->stopped) { 865 /* maybe there's no control data, just status ack */ 866 if (ep->num == 0 && _req->length == 0) { 867 net2272_done(ep, req, 0); 868 dev_vdbg(dev->dev, "%s status ack\n", ep->ep.name); 869 goto done; 870 } 871 872 /* Return zlp, don't let it block subsequent packets */ 873 s = net2272_ep_read(ep, EP_STAT0); 874 if (s & (1 << BUFFER_EMPTY)) { 875 /* Buffer is empty check for a blocking zlp, handle it */ 876 if ((s & (1 << NAK_OUT_PACKETS)) && 877 net2272_ep_read(ep, EP_STAT1) & (1 << LOCAL_OUT_ZLP)) { 878 dev_dbg(dev->dev, "WARNING: returning ZLP short packet termination!\n"); 879 /* 880 * Request is going to terminate with a short packet ... 881 * hope the client is ready for it! 882 */ 883 status = net2272_read_fifo(ep, req); 884 /* clear short packet naking */ 885 net2272_ep_write(ep, EP_STAT0, (1 << NAK_OUT_PACKETS)); 886 goto done; 887 } 888 } 889 890 /* try dma first */ 891 status = net2272_kick_dma(ep, req); 892 893 if (status < 0) { 894 /* dma failed (most likely in use by another endpoint) 895 * fallback to pio 896 */ 897 status = 0; 898 899 if (ep->is_in) 900 status = net2272_write_fifo(ep, req); 901 else { 902 s = net2272_ep_read(ep, EP_STAT0); 903 if ((s & (1 << BUFFER_EMPTY)) == 0) 904 status = net2272_read_fifo(ep, req); 905 } 906 907 if (unlikely(status != 0)) { 908 if (status > 0) 909 status = 0; 910 req = NULL; 911 } 912 } 913 } 914 if (likely(req)) 915 list_add_tail(&req->queue, &ep->queue); 916 917 if (likely(!list_empty(&ep->queue))) 918 net2272_ep_write(ep, EP_RSPCLR, 1 << ALT_NAK_OUT_PACKETS); 919 done: 920 spin_unlock_irqrestore(&dev->lock, flags); 921 922 return 0; 923} 924 925/* dequeue ALL requests */ 926static void 927net2272_dequeue_all(struct net2272_ep *ep) 928{ 929 struct net2272_request *req; 930 931 /* called with spinlock held */ 932 ep->stopped = 1; 933 934 while (!list_empty(&ep->queue)) { 935 req = list_entry(ep->queue.next, 936 struct net2272_request, 937 queue); 938 net2272_done(ep, req, -ESHUTDOWN); 939 } 940} 941 942/* dequeue JUST ONE request */ 943static int 944net2272_dequeue(struct usb_ep *_ep, struct usb_request *_req) 945{ 946 struct net2272_ep *ep; 947 struct net2272_request *req; 948 unsigned long flags; 949 int stopped; 950 951 ep = container_of(_ep, struct net2272_ep, ep); 952 if (!_ep || (!ep->desc && ep->num != 0) || !_req) 953 return -EINVAL; 954 955 spin_lock_irqsave(&ep->dev->lock, flags); 956 stopped = ep->stopped; 957 ep->stopped = 1; 958 959 /* make sure it's still queued on this endpoint */ 960 list_for_each_entry(req, &ep->queue, queue) { 961 if (&req->req == _req) 962 break; 963 } 964 if (&req->req != _req) { 965 spin_unlock_irqrestore(&ep->dev->lock, flags); 966 return -EINVAL; 967 } 968 969 /* queue head may be partially complete */ 970 if (ep->queue.next == &req->queue) { 971 dev_dbg(ep->dev->dev, "unlink (%s) pio\n", _ep->name); 972 net2272_done(ep, req, -ECONNRESET); 973 } 974 req = NULL; 975 ep->stopped = stopped; 976 977 spin_unlock_irqrestore(&ep->dev->lock, flags); 978 return 0; 979} 980 981/*---------------------------------------------------------------------------*/ 982 983static int 984net2272_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged) 985{ 986 struct net2272_ep *ep; 987 unsigned long flags; 988 int ret = 0; 989 990 ep = container_of(_ep, struct net2272_ep, ep); 991 if (!_ep || (!ep->desc && ep->num != 0)) 992 return -EINVAL; 993 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) 994 return -ESHUTDOWN; 995 if (ep->desc /* not ep0 */ && usb_endpoint_xfer_isoc(ep->desc)) 996 return -EINVAL; 997 998 spin_lock_irqsave(&ep->dev->lock, flags); 999 if (!list_empty(&ep->queue)) 1000 ret = -EAGAIN; 1001 else if (ep->is_in && value && net2272_fifo_status(_ep) != 0) 1002 ret = -EAGAIN; 1003 else { 1004 dev_vdbg(ep->dev->dev, "%s %s %s\n", _ep->name, 1005 value ? "set" : "clear", 1006 wedged ? "wedge" : "halt"); 1007 /* set/clear */ 1008 if (value) { 1009 if (ep->num == 0) 1010 ep->dev->protocol_stall = 1; 1011 else 1012 set_halt(ep); 1013 if (wedged) 1014 ep->wedged = 1; 1015 } else { 1016 clear_halt(ep); 1017 ep->wedged = 0; 1018 } 1019 } 1020 spin_unlock_irqrestore(&ep->dev->lock, flags); 1021 1022 return ret; 1023} 1024 1025static int 1026net2272_set_halt(struct usb_ep *_ep, int value) 1027{ 1028 return net2272_set_halt_and_wedge(_ep, value, 0); 1029} 1030 1031static int 1032net2272_set_wedge(struct usb_ep *_ep) 1033{ 1034 if (!_ep || _ep->name == ep0name) 1035 return -EINVAL; 1036 return net2272_set_halt_and_wedge(_ep, 1, 1); 1037} 1038 1039static int 1040net2272_fifo_status(struct usb_ep *_ep) 1041{ 1042 struct net2272_ep *ep; 1043 u16 avail; 1044 1045 ep = container_of(_ep, struct net2272_ep, ep); 1046 if (!_ep || (!ep->desc && ep->num != 0)) 1047 return -ENODEV; 1048 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) 1049 return -ESHUTDOWN; 1050 1051 avail = net2272_ep_read(ep, EP_AVAIL1) << 8; 1052 avail |= net2272_ep_read(ep, EP_AVAIL0); 1053 if (avail > ep->fifo_size) 1054 return -EOVERFLOW; 1055 if (ep->is_in) 1056 avail = ep->fifo_size - avail; 1057 return avail; 1058} 1059 1060static void 1061net2272_fifo_flush(struct usb_ep *_ep) 1062{ 1063 struct net2272_ep *ep; 1064 1065 ep = container_of(_ep, struct net2272_ep, ep); 1066 if (!_ep || (!ep->desc && ep->num != 0)) 1067 return; 1068 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) 1069 return; 1070 1071 net2272_ep_write(ep, EP_STAT1, 1 << BUFFER_FLUSH); 1072} 1073 1074static struct usb_ep_ops net2272_ep_ops = { 1075 .enable = net2272_enable, 1076 .disable = net2272_disable, 1077 1078 .alloc_request = net2272_alloc_request, 1079 .free_request = net2272_free_request, 1080 1081 .queue = net2272_queue, 1082 .dequeue = net2272_dequeue, 1083 1084 .set_halt = net2272_set_halt, 1085 .set_wedge = net2272_set_wedge, 1086 .fifo_status = net2272_fifo_status, 1087 .fifo_flush = net2272_fifo_flush, 1088}; 1089 1090/*---------------------------------------------------------------------------*/ 1091 1092static int 1093net2272_get_frame(struct usb_gadget *_gadget) 1094{ 1095 struct net2272 *dev; 1096 unsigned long flags; 1097 u16 ret; 1098 1099 if (!_gadget) 1100 return -ENODEV; 1101 dev = container_of(_gadget, struct net2272, gadget); 1102 spin_lock_irqsave(&dev->lock, flags); 1103 1104 ret = net2272_read(dev, FRAME1) << 8; 1105 ret |= net2272_read(dev, FRAME0); 1106 1107 spin_unlock_irqrestore(&dev->lock, flags); 1108 return ret; 1109} 1110 1111static int 1112net2272_wakeup(struct usb_gadget *_gadget) 1113{ 1114 struct net2272 *dev; 1115 u8 tmp; 1116 unsigned long flags; 1117 1118 if (!_gadget) 1119 return 0; 1120 dev = container_of(_gadget, struct net2272, gadget); 1121 1122 spin_lock_irqsave(&dev->lock, flags); 1123 tmp = net2272_read(dev, USBCTL0); 1124 if (tmp & (1 << IO_WAKEUP_ENABLE)) 1125 net2272_write(dev, USBCTL1, (1 << GENERATE_RESUME)); 1126 1127 spin_unlock_irqrestore(&dev->lock, flags); 1128 1129 return 0; 1130} 1131 1132static int 1133net2272_set_selfpowered(struct usb_gadget *_gadget, int value) 1134{ 1135 if (!_gadget) 1136 return -ENODEV; 1137 1138 _gadget->is_selfpowered = (value != 0); 1139 1140 return 0; 1141} 1142 1143static int 1144net2272_pullup(struct usb_gadget *_gadget, int is_on) 1145{ 1146 struct net2272 *dev; 1147 u8 tmp; 1148 unsigned long flags; 1149 1150 if (!_gadget) 1151 return -ENODEV; 1152 dev = container_of(_gadget, struct net2272, gadget); 1153 1154 spin_lock_irqsave(&dev->lock, flags); 1155 tmp = net2272_read(dev, USBCTL0); 1156 dev->softconnect = (is_on != 0); 1157 if (is_on) 1158 tmp |= (1 << USB_DETECT_ENABLE); 1159 else 1160 tmp &= ~(1 << USB_DETECT_ENABLE); 1161 net2272_write(dev, USBCTL0, tmp); 1162 spin_unlock_irqrestore(&dev->lock, flags); 1163 1164 return 0; 1165} 1166 1167static int net2272_start(struct usb_gadget *_gadget, 1168 struct usb_gadget_driver *driver); 1169static int net2272_stop(struct usb_gadget *_gadget); 1170 1171static const struct usb_gadget_ops net2272_ops = { 1172 .get_frame = net2272_get_frame, 1173 .wakeup = net2272_wakeup, 1174 .set_selfpowered = net2272_set_selfpowered, 1175 .pullup = net2272_pullup, 1176 .udc_start = net2272_start, 1177 .udc_stop = net2272_stop, 1178}; 1179 1180/*---------------------------------------------------------------------------*/ 1181 1182static ssize_t 1183registers_show(struct device *_dev, struct device_attribute *attr, char *buf) 1184{ 1185 struct net2272 *dev; 1186 char *next; 1187 unsigned size, t; 1188 unsigned long flags; 1189 u8 t1, t2; 1190 int i; 1191 const char *s; 1192 1193 dev = dev_get_drvdata(_dev); 1194 next = buf; 1195 size = PAGE_SIZE; 1196 spin_lock_irqsave(&dev->lock, flags); 1197 1198 if (dev->driver) 1199 s = dev->driver->driver.name; 1200 else 1201 s = "(none)"; 1202 1203 /* Main Control Registers */ 1204 t = scnprintf(next, size, "%s version %s," 1205 "chiprev %02x, locctl %02x\n" 1206 "irqenb0 %02x irqenb1 %02x " 1207 "irqstat0 %02x irqstat1 %02x\n", 1208 driver_name, driver_vers, dev->chiprev, 1209 net2272_read(dev, LOCCTL), 1210 net2272_read(dev, IRQENB0), 1211 net2272_read(dev, IRQENB1), 1212 net2272_read(dev, IRQSTAT0), 1213 net2272_read(dev, IRQSTAT1)); 1214 size -= t; 1215 next += t; 1216 1217 /* DMA */ 1218 t1 = net2272_read(dev, DMAREQ); 1219 t = scnprintf(next, size, "\ndmareq %02x: %s %s%s%s%s\n", 1220 t1, ep_name[(t1 & 0x01) + 1], 1221 t1 & (1 << DMA_CONTROL_DACK) ? "dack " : "", 1222 t1 & (1 << DMA_REQUEST_ENABLE) ? "reqenb " : "", 1223 t1 & (1 << DMA_REQUEST) ? "req " : "", 1224 t1 & (1 << DMA_BUFFER_VALID) ? "valid " : ""); 1225 size -= t; 1226 next += t; 1227 1228 /* USB Control Registers */ 1229 t1 = net2272_read(dev, USBCTL1); 1230 if (t1 & (1 << VBUS_PIN)) { 1231 if (t1 & (1 << USB_HIGH_SPEED)) 1232 s = "high speed"; 1233 else if (dev->gadget.speed == USB_SPEED_UNKNOWN) 1234 s = "powered"; 1235 else 1236 s = "full speed"; 1237 } else 1238 s = "not attached"; 1239 t = scnprintf(next, size, 1240 "usbctl0 %02x usbctl1 %02x addr 0x%02x (%s)\n", 1241 net2272_read(dev, USBCTL0), t1, 1242 net2272_read(dev, OURADDR), s); 1243 size -= t; 1244 next += t; 1245 1246 /* Endpoint Registers */ 1247 for (i = 0; i < 4; ++i) { 1248 struct net2272_ep *ep; 1249 1250 ep = &dev->ep[i]; 1251 if (i && !ep->desc) 1252 continue; 1253 1254 t1 = net2272_ep_read(ep, EP_CFG); 1255 t2 = net2272_ep_read(ep, EP_RSPSET); 1256 t = scnprintf(next, size, 1257 "\n%s\tcfg %02x rsp (%02x) %s%s%s%s%s%s%s%s" 1258 "irqenb %02x\n", 1259 ep->ep.name, t1, t2, 1260 (t2 & (1 << ALT_NAK_OUT_PACKETS)) ? "NAK " : "", 1261 (t2 & (1 << HIDE_STATUS_PHASE)) ? "hide " : "", 1262 (t2 & (1 << AUTOVALIDATE)) ? "auto " : "", 1263 (t2 & (1 << INTERRUPT_MODE)) ? "interrupt " : "", 1264 (t2 & (1 << CONTROL_STATUS_PHASE_HANDSHAKE)) ? "status " : "", 1265 (t2 & (1 << NAK_OUT_PACKETS_MODE)) ? "NAKmode " : "", 1266 (t2 & (1 << ENDPOINT_TOGGLE)) ? "DATA1 " : "DATA0 ", 1267 (t2 & (1 << ENDPOINT_HALT)) ? "HALT " : "", 1268 net2272_ep_read(ep, EP_IRQENB)); 1269 size -= t; 1270 next += t; 1271 1272 t = scnprintf(next, size, 1273 "\tstat0 %02x stat1 %02x avail %04x " 1274 "(ep%d%s-%s)%s\n", 1275 net2272_ep_read(ep, EP_STAT0), 1276 net2272_ep_read(ep, EP_STAT1), 1277 (net2272_ep_read(ep, EP_AVAIL1) << 8) | net2272_ep_read(ep, EP_AVAIL0), 1278 t1 & 0x0f, 1279 ep->is_in ? "in" : "out", 1280 type_string(t1 >> 5), 1281 ep->stopped ? "*" : ""); 1282 size -= t; 1283 next += t; 1284 1285 t = scnprintf(next, size, 1286 "\tep_transfer %06x\n", 1287 ((net2272_ep_read(ep, EP_TRANSFER2) & 0xff) << 16) | 1288 ((net2272_ep_read(ep, EP_TRANSFER1) & 0xff) << 8) | 1289 ((net2272_ep_read(ep, EP_TRANSFER0) & 0xff))); 1290 size -= t; 1291 next += t; 1292 1293 t1 = net2272_ep_read(ep, EP_BUFF_STATES) & 0x03; 1294 t2 = (net2272_ep_read(ep, EP_BUFF_STATES) >> 2) & 0x03; 1295 t = scnprintf(next, size, 1296 "\tbuf-a %s buf-b %s\n", 1297 buf_state_string(t1), 1298 buf_state_string(t2)); 1299 size -= t; 1300 next += t; 1301 } 1302 1303 spin_unlock_irqrestore(&dev->lock, flags); 1304 1305 return PAGE_SIZE - size; 1306} 1307static DEVICE_ATTR_RO(registers); 1308 1309/*---------------------------------------------------------------------------*/ 1310 1311static void 1312net2272_set_fifo_mode(struct net2272 *dev, int mode) 1313{ 1314 u8 tmp; 1315 1316 tmp = net2272_read(dev, LOCCTL) & 0x3f; 1317 tmp |= (mode << 6); 1318 net2272_write(dev, LOCCTL, tmp); 1319 1320 INIT_LIST_HEAD(&dev->gadget.ep_list); 1321 1322 /* always ep-a, ep-c ... maybe not ep-b */ 1323 list_add_tail(&dev->ep[1].ep.ep_list, &dev->gadget.ep_list); 1324 1325 switch (mode) { 1326 case 0: 1327 list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list); 1328 dev->ep[1].fifo_size = dev->ep[2].fifo_size = 512; 1329 break; 1330 case 1: 1331 list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list); 1332 dev->ep[1].fifo_size = 1024; 1333 dev->ep[2].fifo_size = 512; 1334 break; 1335 case 2: 1336 list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list); 1337 dev->ep[1].fifo_size = dev->ep[2].fifo_size = 1024; 1338 break; 1339 case 3: 1340 dev->ep[1].fifo_size = 1024; 1341 break; 1342 } 1343 1344 /* ep-c is always 2 512 byte buffers */ 1345 list_add_tail(&dev->ep[3].ep.ep_list, &dev->gadget.ep_list); 1346 dev->ep[3].fifo_size = 512; 1347} 1348 1349/*---------------------------------------------------------------------------*/ 1350 1351static void 1352net2272_usb_reset(struct net2272 *dev) 1353{ 1354 dev->gadget.speed = USB_SPEED_UNKNOWN; 1355 1356 net2272_cancel_dma(dev); 1357 1358 net2272_write(dev, IRQENB0, 0); 1359 net2272_write(dev, IRQENB1, 0); 1360 1361 /* clear irq state */ 1362 net2272_write(dev, IRQSTAT0, 0xff); 1363 net2272_write(dev, IRQSTAT1, ~(1 << SUSPEND_REQUEST_INTERRUPT)); 1364 1365 net2272_write(dev, DMAREQ, 1366 (0 << DMA_BUFFER_VALID) | 1367 (0 << DMA_REQUEST_ENABLE) | 1368 (1 << DMA_CONTROL_DACK) | 1369 (dev->dma_eot_polarity << EOT_POLARITY) | 1370 (dev->dma_dack_polarity << DACK_POLARITY) | 1371 (dev->dma_dreq_polarity << DREQ_POLARITY) | 1372 ((dma_ep >> 1) << DMA_ENDPOINT_SELECT)); 1373 1374 net2272_cancel_dma(dev); 1375 net2272_set_fifo_mode(dev, (fifo_mode <= 3) ? fifo_mode : 0); 1376 1377 /* Set the NET2272 ep fifo data width to 16-bit mode and for correct byte swapping 1378 * note that the higher level gadget drivers are expected to convert data to little endian. 1379 * Enable byte swap for your local bus/cpu if needed by setting BYTE_SWAP in LOCCTL here 1380 */ 1381 net2272_write(dev, LOCCTL, net2272_read(dev, LOCCTL) | (1 << DATA_WIDTH)); 1382 net2272_write(dev, LOCCTL1, (dma_mode << DMA_MODE)); 1383} 1384 1385static void 1386net2272_usb_reinit(struct net2272 *dev) 1387{ 1388 int i; 1389 1390 /* basic endpoint init */ 1391 for (i = 0; i < 4; ++i) { 1392 struct net2272_ep *ep = &dev->ep[i]; 1393 1394 ep->ep.name = ep_name[i]; 1395 ep->dev = dev; 1396 ep->num = i; 1397 ep->not_empty = 0; 1398 1399 if (use_dma && ep->num == dma_ep) 1400 ep->dma = 1; 1401 1402 if (i > 0 && i <= 3) 1403 ep->fifo_size = 512; 1404 else 1405 ep->fifo_size = 64; 1406 net2272_ep_reset(ep); 1407 } 1408 usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 64); 1409 1410 dev->gadget.ep0 = &dev->ep[0].ep; 1411 dev->ep[0].stopped = 0; 1412 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); 1413} 1414 1415static void 1416net2272_ep0_start(struct net2272 *dev) 1417{ 1418 struct net2272_ep *ep0 = &dev->ep[0]; 1419 1420 net2272_ep_write(ep0, EP_RSPSET, 1421 (1 << NAK_OUT_PACKETS_MODE) | 1422 (1 << ALT_NAK_OUT_PACKETS)); 1423 net2272_ep_write(ep0, EP_RSPCLR, 1424 (1 << HIDE_STATUS_PHASE) | 1425 (1 << CONTROL_STATUS_PHASE_HANDSHAKE)); 1426 net2272_write(dev, USBCTL0, 1427 (dev->softconnect << USB_DETECT_ENABLE) | 1428 (1 << USB_ROOT_PORT_WAKEUP_ENABLE) | 1429 (1 << IO_WAKEUP_ENABLE)); 1430 net2272_write(dev, IRQENB0, 1431 (1 << SETUP_PACKET_INTERRUPT_ENABLE) | 1432 (1 << ENDPOINT_0_INTERRUPT_ENABLE) | 1433 (1 << DMA_DONE_INTERRUPT_ENABLE)); 1434 net2272_write(dev, IRQENB1, 1435 (1 << VBUS_INTERRUPT_ENABLE) | 1436 (1 << ROOT_PORT_RESET_INTERRUPT_ENABLE) | 1437 (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE)); 1438} 1439 1440/* when a driver is successfully registered, it will receive 1441 * control requests including set_configuration(), which enables 1442 * non-control requests. then usb traffic follows until a 1443 * disconnect is reported. then a host may connect again, or 1444 * the driver might get unbound. 1445 */ 1446static int net2272_start(struct usb_gadget *_gadget, 1447 struct usb_gadget_driver *driver) 1448{ 1449 struct net2272 *dev; 1450 unsigned i; 1451 1452 if (!driver || !driver->setup || 1453 driver->max_speed != USB_SPEED_HIGH) 1454 return -EINVAL; 1455 1456 dev = container_of(_gadget, struct net2272, gadget); 1457 1458 for (i = 0; i < 4; ++i) 1459 dev->ep[i].irqs = 0; 1460 /* hook up the driver ... */ 1461 dev->softconnect = 1; 1462 driver->driver.bus = NULL; 1463 dev->driver = driver; 1464 1465 /* ... then enable host detection and ep0; and we're ready 1466 * for set_configuration as well as eventual disconnect. 1467 */ 1468 net2272_ep0_start(dev); 1469 1470 return 0; 1471} 1472 1473static void 1474stop_activity(struct net2272 *dev, struct usb_gadget_driver *driver) 1475{ 1476 int i; 1477 1478 /* don't disconnect if it's not connected */ 1479 if (dev->gadget.speed == USB_SPEED_UNKNOWN) 1480 driver = NULL; 1481 1482 /* stop hardware; prevent new request submissions; 1483 * and kill any outstanding requests. 1484 */ 1485 net2272_usb_reset(dev); 1486 for (i = 0; i < 4; ++i) 1487 net2272_dequeue_all(&dev->ep[i]); 1488 1489 /* report disconnect; the driver is already quiesced */ 1490 if (driver) { 1491 spin_unlock(&dev->lock); 1492 driver->disconnect(&dev->gadget); 1493 spin_lock(&dev->lock); 1494 } 1495 1496 net2272_usb_reinit(dev); 1497} 1498 1499static int net2272_stop(struct usb_gadget *_gadget) 1500{ 1501 struct net2272 *dev; 1502 unsigned long flags; 1503 1504 dev = container_of(_gadget, struct net2272, gadget); 1505 1506 spin_lock_irqsave(&dev->lock, flags); 1507 stop_activity(dev, NULL); 1508 spin_unlock_irqrestore(&dev->lock, flags); 1509 1510 dev->driver = NULL; 1511 1512 return 0; 1513} 1514 1515/*---------------------------------------------------------------------------*/ 1516/* handle ep-a/ep-b dma completions */ 1517static void 1518net2272_handle_dma(struct net2272_ep *ep) 1519{ 1520 struct net2272_request *req; 1521 unsigned len; 1522 int status; 1523 1524 if (!list_empty(&ep->queue)) 1525 req = list_entry(ep->queue.next, 1526 struct net2272_request, queue); 1527 else 1528 req = NULL; 1529 1530 dev_vdbg(ep->dev->dev, "handle_dma %s req %p\n", ep->ep.name, req); 1531 1532 /* Ensure DREQ is de-asserted */ 1533 net2272_write(ep->dev, DMAREQ, 1534 (0 << DMA_BUFFER_VALID) 1535 | (0 << DMA_REQUEST_ENABLE) 1536 | (1 << DMA_CONTROL_DACK) 1537 | (ep->dev->dma_eot_polarity << EOT_POLARITY) 1538 | (ep->dev->dma_dack_polarity << DACK_POLARITY) 1539 | (ep->dev->dma_dreq_polarity << DREQ_POLARITY) 1540 | (ep->dma << DMA_ENDPOINT_SELECT)); 1541 1542 ep->dev->dma_busy = 0; 1543 1544 net2272_ep_write(ep, EP_IRQENB, 1545 (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE) 1546 | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE) 1547 | net2272_ep_read(ep, EP_IRQENB)); 1548 1549 /* device-to-host transfer completed */ 1550 if (ep->is_in) { 1551 /* validate a short packet or zlp if necessary */ 1552 if ((req->req.length % ep->ep.maxpacket != 0) || 1553 req->req.zero) 1554 set_fifo_bytecount(ep, 0); 1555 1556 net2272_done(ep, req, 0); 1557 if (!list_empty(&ep->queue)) { 1558 req = list_entry(ep->queue.next, 1559 struct net2272_request, queue); 1560 status = net2272_kick_dma(ep, req); 1561 if (status < 0) 1562 net2272_pio_advance(ep); 1563 } 1564 1565 /* host-to-device transfer completed */ 1566 } else { 1567 /* terminated with a short packet? */ 1568 if (net2272_read(ep->dev, IRQSTAT0) & 1569 (1 << DMA_DONE_INTERRUPT)) { 1570 /* abort system dma */ 1571 net2272_cancel_dma(ep->dev); 1572 } 1573 1574 /* EP_TRANSFER will contain the number of bytes 1575 * actually received. 1576 * NOTE: There is no overflow detection on EP_TRANSFER: 1577 * We can't deal with transfers larger than 2^24 bytes! 1578 */ 1579 len = (net2272_ep_read(ep, EP_TRANSFER2) << 16) 1580 | (net2272_ep_read(ep, EP_TRANSFER1) << 8) 1581 | (net2272_ep_read(ep, EP_TRANSFER0)); 1582 1583 if (ep->not_empty) 1584 len += 4; 1585 1586 req->req.actual += len; 1587 1588 /* get any remaining data */ 1589 net2272_pio_advance(ep); 1590 } 1591} 1592 1593/*---------------------------------------------------------------------------*/ 1594 1595static void 1596net2272_handle_ep(struct net2272_ep *ep) 1597{ 1598 struct net2272_request *req; 1599 u8 stat0, stat1; 1600 1601 if (!list_empty(&ep->queue)) 1602 req = list_entry(ep->queue.next, 1603 struct net2272_request, queue); 1604 else 1605 req = NULL; 1606 1607 /* ack all, and handle what we care about */ 1608 stat0 = net2272_ep_read(ep, EP_STAT0); 1609 stat1 = net2272_ep_read(ep, EP_STAT1); 1610 ep->irqs++; 1611 1612 dev_vdbg(ep->dev->dev, "%s ack ep_stat0 %02x, ep_stat1 %02x, req %p\n", 1613 ep->ep.name, stat0, stat1, req ? &req->req : NULL); 1614 1615 net2272_ep_write(ep, EP_STAT0, stat0 & 1616 ~((1 << NAK_OUT_PACKETS) 1617 | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT))); 1618 net2272_ep_write(ep, EP_STAT1, stat1); 1619 1620 /* data packet(s) received (in the fifo, OUT) 1621 * direction must be validated, otherwise control read status phase 1622 * could be interpreted as a valid packet 1623 */ 1624 if (!ep->is_in && (stat0 & (1 << DATA_PACKET_RECEIVED_INTERRUPT))) 1625 net2272_pio_advance(ep); 1626 /* data packet(s) transmitted (IN) */ 1627 else if (stat0 & (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)) 1628 net2272_pio_advance(ep); 1629} 1630 1631static struct net2272_ep * 1632net2272_get_ep_by_addr(struct net2272 *dev, u16 wIndex) 1633{ 1634 struct net2272_ep *ep; 1635 1636 if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0) 1637 return &dev->ep[0]; 1638 1639 list_for_each_entry(ep, &dev->gadget.ep_list, ep.ep_list) { 1640 u8 bEndpointAddress; 1641 1642 if (!ep->desc) 1643 continue; 1644 bEndpointAddress = ep->desc->bEndpointAddress; 1645 if ((wIndex ^ bEndpointAddress) & USB_DIR_IN) 1646 continue; 1647 if ((wIndex & 0x0f) == (bEndpointAddress & 0x0f)) 1648 return ep; 1649 } 1650 return NULL; 1651} 1652 1653/* 1654 * USB Test Packet: 1655 * JKJKJKJK * 9 1656 * JJKKJJKK * 8 1657 * JJJJKKKK * 8 1658 * JJJJJJJKKKKKKK * 8 1659 * JJJJJJJK * 8 1660 * {JKKKKKKK * 10}, JK 1661 */ 1662static const u8 net2272_test_packet[] = { 1663 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 1664 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 1665 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 1666 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 1667 0x7F, 0xBF, 0xDF, 0xEF, 0xF7, 0xFB, 0xFD, 1668 0xFC, 0x7E, 0xBF, 0xDF, 0xEF, 0xF7, 0xFD, 0x7E 1669}; 1670 1671static void 1672net2272_set_test_mode(struct net2272 *dev, int mode) 1673{ 1674 int i; 1675 1676 /* Disable all net2272 interrupts: 1677 * Nothing but a power cycle should stop the test. 1678 */ 1679 net2272_write(dev, IRQENB0, 0x00); 1680 net2272_write(dev, IRQENB1, 0x00); 1681 1682 /* Force tranceiver to high-speed */ 1683 net2272_write(dev, XCVRDIAG, 1 << FORCE_HIGH_SPEED); 1684 1685 net2272_write(dev, PAGESEL, 0); 1686 net2272_write(dev, EP_STAT0, 1 << DATA_PACKET_TRANSMITTED_INTERRUPT); 1687 net2272_write(dev, EP_RSPCLR, 1688 (1 << CONTROL_STATUS_PHASE_HANDSHAKE) 1689 | (1 << HIDE_STATUS_PHASE)); 1690 net2272_write(dev, EP_CFG, 1 << ENDPOINT_DIRECTION); 1691 net2272_write(dev, EP_STAT1, 1 << BUFFER_FLUSH); 1692 1693 /* wait for status phase to complete */ 1694 while (!(net2272_read(dev, EP_STAT0) & 1695 (1 << DATA_PACKET_TRANSMITTED_INTERRUPT))) 1696 ; 1697 1698 /* Enable test mode */ 1699 net2272_write(dev, USBTEST, mode); 1700 1701 /* load test packet */ 1702 if (mode == TEST_PACKET) { 1703 /* switch to 8 bit mode */ 1704 net2272_write(dev, LOCCTL, net2272_read(dev, LOCCTL) & 1705 ~(1 << DATA_WIDTH)); 1706 1707 for (i = 0; i < sizeof(net2272_test_packet); ++i) 1708 net2272_write(dev, EP_DATA, net2272_test_packet[i]); 1709 1710 /* Validate test packet */ 1711 net2272_write(dev, EP_TRANSFER0, 0); 1712 } 1713} 1714 1715static void 1716net2272_handle_stat0_irqs(struct net2272 *dev, u8 stat) 1717{ 1718 struct net2272_ep *ep; 1719 u8 num, scratch; 1720 1721 /* starting a control request? */ 1722 if (unlikely(stat & (1 << SETUP_PACKET_INTERRUPT))) { 1723 union { 1724 u8 raw[8]; 1725 struct usb_ctrlrequest r; 1726 } u; 1727 int tmp = 0; 1728 struct net2272_request *req; 1729 1730 if (dev->gadget.speed == USB_SPEED_UNKNOWN) { 1731 if (net2272_read(dev, USBCTL1) & (1 << USB_HIGH_SPEED)) 1732 dev->gadget.speed = USB_SPEED_HIGH; 1733 else 1734 dev->gadget.speed = USB_SPEED_FULL; 1735 dev_dbg(dev->dev, "%s\n", 1736 usb_speed_string(dev->gadget.speed)); 1737 } 1738 1739 ep = &dev->ep[0]; 1740 ep->irqs++; 1741 1742 /* make sure any leftover interrupt state is cleared */ 1743 stat &= ~(1 << ENDPOINT_0_INTERRUPT); 1744 while (!list_empty(&ep->queue)) { 1745 req = list_entry(ep->queue.next, 1746 struct net2272_request, queue); 1747 net2272_done(ep, req, 1748 (req->req.actual == req->req.length) ? 0 : -EPROTO); 1749 } 1750 ep->stopped = 0; 1751 dev->protocol_stall = 0; 1752 net2272_ep_write(ep, EP_STAT0, 1753 (1 << DATA_IN_TOKEN_INTERRUPT) 1754 | (1 << DATA_OUT_TOKEN_INTERRUPT) 1755 | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT) 1756 | (1 << DATA_PACKET_RECEIVED_INTERRUPT) 1757 | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)); 1758 net2272_ep_write(ep, EP_STAT1, 1759 (1 << TIMEOUT) 1760 | (1 << USB_OUT_ACK_SENT) 1761 | (1 << USB_OUT_NAK_SENT) 1762 | (1 << USB_IN_ACK_RCVD) 1763 | (1 << USB_IN_NAK_SENT) 1764 | (1 << USB_STALL_SENT) 1765 | (1 << LOCAL_OUT_ZLP)); 1766 1767 /* 1768 * Ensure Control Read pre-validation setting is beyond maximum size 1769 * - Control Writes can leave non-zero values in EP_TRANSFER. If 1770 * an EP0 transfer following the Control Write is a Control Read, 1771 * the NET2272 sees the non-zero EP_TRANSFER as an unexpected 1772 * pre-validation count. 1773 * - Setting EP_TRANSFER beyond the maximum EP0 transfer size ensures 1774 * the pre-validation count cannot cause an unexpected validatation 1775 */ 1776 net2272_write(dev, PAGESEL, 0); 1777 net2272_write(dev, EP_TRANSFER2, 0xff); 1778 net2272_write(dev, EP_TRANSFER1, 0xff); 1779 net2272_write(dev, EP_TRANSFER0, 0xff); 1780 1781 u.raw[0] = net2272_read(dev, SETUP0); 1782 u.raw[1] = net2272_read(dev, SETUP1); 1783 u.raw[2] = net2272_read(dev, SETUP2); 1784 u.raw[3] = net2272_read(dev, SETUP3); 1785 u.raw[4] = net2272_read(dev, SETUP4); 1786 u.raw[5] = net2272_read(dev, SETUP5); 1787 u.raw[6] = net2272_read(dev, SETUP6); 1788 u.raw[7] = net2272_read(dev, SETUP7); 1789 /* 1790 * If you have a big endian cpu make sure le16_to_cpus 1791 * performs the proper byte swapping here... 1792 */ 1793 le16_to_cpus(&u.r.wValue); 1794 le16_to_cpus(&u.r.wIndex); 1795 le16_to_cpus(&u.r.wLength); 1796 1797 /* ack the irq */ 1798 net2272_write(dev, IRQSTAT0, 1 << SETUP_PACKET_INTERRUPT); 1799 stat ^= (1 << SETUP_PACKET_INTERRUPT); 1800 1801 /* watch control traffic at the token level, and force 1802 * synchronization before letting the status phase happen. 1803 */ 1804 ep->is_in = (u.r.bRequestType & USB_DIR_IN) != 0; 1805 if (ep->is_in) { 1806 scratch = (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE) 1807 | (1 << DATA_OUT_TOKEN_INTERRUPT_ENABLE) 1808 | (1 << DATA_IN_TOKEN_INTERRUPT_ENABLE); 1809 stop_out_naking(ep); 1810 } else 1811 scratch = (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE) 1812 | (1 << DATA_OUT_TOKEN_INTERRUPT_ENABLE) 1813 | (1 << DATA_IN_TOKEN_INTERRUPT_ENABLE); 1814 net2272_ep_write(ep, EP_IRQENB, scratch); 1815 1816 if ((u.r.bRequestType & USB_TYPE_MASK) != USB_TYPE_STANDARD) 1817 goto delegate; 1818 switch (u.r.bRequest) { 1819 case USB_REQ_GET_STATUS: { 1820 struct net2272_ep *e; 1821 u16 status = 0; 1822 1823 switch (u.r.bRequestType & USB_RECIP_MASK) { 1824 case USB_RECIP_ENDPOINT: 1825 e = net2272_get_ep_by_addr(dev, u.r.wIndex); 1826 if (!e || u.r.wLength > 2) 1827 goto do_stall; 1828 if (net2272_ep_read(e, EP_RSPSET) & (1 << ENDPOINT_HALT)) 1829 status = __constant_cpu_to_le16(1); 1830 else 1831 status = __constant_cpu_to_le16(0); 1832 1833 /* don't bother with a request object! */ 1834 net2272_ep_write(&dev->ep[0], EP_IRQENB, 0); 1835 writew(status, net2272_reg_addr(dev, EP_DATA)); 1836 set_fifo_bytecount(&dev->ep[0], 0); 1837 allow_status(ep); 1838 dev_vdbg(dev->dev, "%s stat %02x\n", 1839 ep->ep.name, status); 1840 goto next_endpoints; 1841 case USB_RECIP_DEVICE: 1842 if (u.r.wLength > 2) 1843 goto do_stall; 1844 if (dev->gadget.is_selfpowered) 1845 status = (1 << USB_DEVICE_SELF_POWERED); 1846 1847 /* don't bother with a request object! */ 1848 net2272_ep_write(&dev->ep[0], EP_IRQENB, 0); 1849 writew(status, net2272_reg_addr(dev, EP_DATA)); 1850 set_fifo_bytecount(&dev->ep[0], 0); 1851 allow_status(ep); 1852 dev_vdbg(dev->dev, "device stat %02x\n", status); 1853 goto next_endpoints; 1854 case USB_RECIP_INTERFACE: 1855 if (u.r.wLength > 2) 1856 goto do_stall; 1857 1858 /* don't bother with a request object! */ 1859 net2272_ep_write(&dev->ep[0], EP_IRQENB, 0); 1860 writew(status, net2272_reg_addr(dev, EP_DATA)); 1861 set_fifo_bytecount(&dev->ep[0], 0); 1862 allow_status(ep); 1863 dev_vdbg(dev->dev, "interface status %02x\n", status); 1864 goto next_endpoints; 1865 } 1866 1867 break; 1868 } 1869 case USB_REQ_CLEAR_FEATURE: { 1870 struct net2272_ep *e; 1871 1872 if (u.r.bRequestType != USB_RECIP_ENDPOINT) 1873 goto delegate; 1874 if (u.r.wValue != USB_ENDPOINT_HALT || 1875 u.r.wLength != 0) 1876 goto do_stall; 1877 e = net2272_get_ep_by_addr(dev, u.r.wIndex); 1878 if (!e) 1879 goto do_stall; 1880 if (e->wedged) { 1881 dev_vdbg(dev->dev, "%s wedged, halt not cleared\n", 1882 ep->ep.name); 1883 } else { 1884 dev_vdbg(dev->dev, "%s clear halt\n", ep->ep.name); 1885 clear_halt(e); 1886 } 1887 allow_status(ep); 1888 goto next_endpoints; 1889 } 1890 case USB_REQ_SET_FEATURE: { 1891 struct net2272_ep *e; 1892 1893 if (u.r.bRequestType == USB_RECIP_DEVICE) { 1894 if (u.r.wIndex != NORMAL_OPERATION) 1895 net2272_set_test_mode(dev, (u.r.wIndex >> 8)); 1896 allow_status(ep); 1897 dev_vdbg(dev->dev, "test mode: %d\n", u.r.wIndex); 1898 goto next_endpoints; 1899 } else if (u.r.bRequestType != USB_RECIP_ENDPOINT) 1900 goto delegate; 1901 if (u.r.wValue != USB_ENDPOINT_HALT || 1902 u.r.wLength != 0) 1903 goto do_stall; 1904 e = net2272_get_ep_by_addr(dev, u.r.wIndex); 1905 if (!e) 1906 goto do_stall; 1907 set_halt(e); 1908 allow_status(ep); 1909 dev_vdbg(dev->dev, "%s set halt\n", ep->ep.name); 1910 goto next_endpoints; 1911 } 1912 case USB_REQ_SET_ADDRESS: { 1913 net2272_write(dev, OURADDR, u.r.wValue & 0xff); 1914 allow_status(ep); 1915 break; 1916 } 1917 default: 1918 delegate: 1919 dev_vdbg(dev->dev, "setup %02x.%02x v%04x i%04x " 1920 "ep_cfg %08x\n", 1921 u.r.bRequestType, u.r.bRequest, 1922 u.r.wValue, u.r.wIndex, 1923 net2272_ep_read(ep, EP_CFG)); 1924 spin_unlock(&dev->lock); 1925 tmp = dev->driver->setup(&dev->gadget, &u.r); 1926 spin_lock(&dev->lock); 1927 } 1928 1929 /* stall ep0 on error */ 1930 if (tmp < 0) { 1931 do_stall: 1932 dev_vdbg(dev->dev, "req %02x.%02x protocol STALL; stat %d\n", 1933 u.r.bRequestType, u.r.bRequest, tmp); 1934 dev->protocol_stall = 1; 1935 } 1936 /* endpoint dma irq? */ 1937 } else if (stat & (1 << DMA_DONE_INTERRUPT)) { 1938 net2272_cancel_dma(dev); 1939 net2272_write(dev, IRQSTAT0, 1 << DMA_DONE_INTERRUPT); 1940 stat &= ~(1 << DMA_DONE_INTERRUPT); 1941 num = (net2272_read(dev, DMAREQ) & (1 << DMA_ENDPOINT_SELECT)) 1942 ? 2 : 1; 1943 1944 ep = &dev->ep[num]; 1945 net2272_handle_dma(ep); 1946 } 1947 1948 next_endpoints: 1949 /* endpoint data irq? */ 1950 scratch = stat & 0x0f; 1951 stat &= ~0x0f; 1952 for (num = 0; scratch; num++) { 1953 u8 t; 1954 1955 /* does this endpoint's FIFO and queue need tending? */ 1956 t = 1 << num; 1957 if ((scratch & t) == 0) 1958 continue; 1959 scratch ^= t; 1960 1961 ep = &dev->ep[num]; 1962 net2272_handle_ep(ep); 1963 } 1964 1965 /* some interrupts we can just ignore */ 1966 stat &= ~(1 << SOF_INTERRUPT); 1967 1968 if (stat) 1969 dev_dbg(dev->dev, "unhandled irqstat0 %02x\n", stat); 1970} 1971 1972static void 1973net2272_handle_stat1_irqs(struct net2272 *dev, u8 stat) 1974{ 1975 u8 tmp, mask; 1976 1977 /* after disconnect there's nothing else to do! */ 1978 tmp = (1 << VBUS_INTERRUPT) | (1 << ROOT_PORT_RESET_INTERRUPT); 1979 mask = (1 << USB_HIGH_SPEED) | (1 << USB_FULL_SPEED); 1980 1981 if (stat & tmp) { 1982 bool reset = false; 1983 bool disconnect = false; 1984 1985 /* 1986 * Ignore disconnects and resets if the speed hasn't been set. 1987 * VBUS can bounce and there's always an initial reset. 1988 */ 1989 net2272_write(dev, IRQSTAT1, tmp); 1990 if (dev->gadget.speed != USB_SPEED_UNKNOWN) { 1991 if ((stat & (1 << VBUS_INTERRUPT)) && 1992 (net2272_read(dev, USBCTL1) & 1993 (1 << VBUS_PIN)) == 0) { 1994 disconnect = true; 1995 dev_dbg(dev->dev, "disconnect %s\n", 1996 dev->driver->driver.name); 1997 } else if ((stat & (1 << ROOT_PORT_RESET_INTERRUPT)) && 1998 (net2272_read(dev, USBCTL1) & mask) 1999 == 0) { 2000 reset = true; 2001 dev_dbg(dev->dev, "reset %s\n", 2002 dev->driver->driver.name); 2003 } 2004 2005 if (disconnect || reset) { 2006 stop_activity(dev, dev->driver); 2007 net2272_ep0_start(dev); 2008 spin_unlock(&dev->lock); 2009 if (reset) 2010 usb_gadget_udc_reset 2011 (&dev->gadget, dev->driver); 2012 else 2013 (dev->driver->disconnect) 2014 (&dev->gadget); 2015 spin_lock(&dev->lock); 2016 return; 2017 } 2018 } 2019 stat &= ~tmp; 2020 2021 if (!stat) 2022 return; 2023 } 2024 2025 tmp = (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT); 2026 if (stat & tmp) { 2027 net2272_write(dev, IRQSTAT1, tmp); 2028 if (stat & (1 << SUSPEND_REQUEST_INTERRUPT)) { 2029 if (dev->driver->suspend) 2030 dev->driver->suspend(&dev->gadget); 2031 if (!enable_suspend) { 2032 stat &= ~(1 << SUSPEND_REQUEST_INTERRUPT); 2033 dev_dbg(dev->dev, "Suspend disabled, ignoring\n"); 2034 } 2035 } else { 2036 if (dev->driver->resume) 2037 dev->driver->resume(&dev->gadget); 2038 } 2039 stat &= ~tmp; 2040 } 2041 2042 /* clear any other status/irqs */ 2043 if (stat) 2044 net2272_write(dev, IRQSTAT1, stat); 2045 2046 /* some status we can just ignore */ 2047 stat &= ~((1 << CONTROL_STATUS_INTERRUPT) 2048 | (1 << SUSPEND_REQUEST_INTERRUPT) 2049 | (1 << RESUME_INTERRUPT)); 2050 if (!stat) 2051 return; 2052 else 2053 dev_dbg(dev->dev, "unhandled irqstat1 %02x\n", stat); 2054} 2055 2056static irqreturn_t net2272_irq(int irq, void *_dev) 2057{ 2058 struct net2272 *dev = _dev; 2059#if defined(PLX_PCI_RDK) || defined(PLX_PCI_RDK2) 2060 u32 intcsr; 2061#endif 2062#if defined(PLX_PCI_RDK) 2063 u8 dmareq; 2064#endif 2065 spin_lock(&dev->lock); 2066#if defined(PLX_PCI_RDK) 2067 intcsr = readl(dev->rdk1.plx9054_base_addr + INTCSR); 2068 2069 if ((intcsr & LOCAL_INTERRUPT_TEST) == LOCAL_INTERRUPT_TEST) { 2070 writel(intcsr & ~(1 << PCI_INTERRUPT_ENABLE), 2071 dev->rdk1.plx9054_base_addr + INTCSR); 2072 net2272_handle_stat1_irqs(dev, net2272_read(dev, IRQSTAT1)); 2073 net2272_handle_stat0_irqs(dev, net2272_read(dev, IRQSTAT0)); 2074 intcsr = readl(dev->rdk1.plx9054_base_addr + INTCSR); 2075 writel(intcsr | (1 << PCI_INTERRUPT_ENABLE), 2076 dev->rdk1.plx9054_base_addr + INTCSR); 2077 } 2078 if ((intcsr & DMA_CHANNEL_0_TEST) == DMA_CHANNEL_0_TEST) { 2079 writeb((1 << CHANNEL_CLEAR_INTERRUPT | (0 << CHANNEL_ENABLE)), 2080 dev->rdk1.plx9054_base_addr + DMACSR0); 2081 2082 dmareq = net2272_read(dev, DMAREQ); 2083 if (dmareq & 0x01) 2084 net2272_handle_dma(&dev->ep[2]); 2085 else 2086 net2272_handle_dma(&dev->ep[1]); 2087 } 2088#endif 2089#if defined(PLX_PCI_RDK2) 2090 /* see if PCI int for us by checking irqstat */ 2091 intcsr = readl(dev->rdk2.fpga_base_addr + RDK2_IRQSTAT); 2092 if (!intcsr & (1 << NET2272_PCI_IRQ)) { 2093 spin_unlock(&dev->lock); 2094 return IRQ_NONE; 2095 } 2096 /* check dma interrupts */ 2097#endif 2098 /* Platform/devcice interrupt handler */ 2099#if !defined(PLX_PCI_RDK) 2100 net2272_handle_stat1_irqs(dev, net2272_read(dev, IRQSTAT1)); 2101 net2272_handle_stat0_irqs(dev, net2272_read(dev, IRQSTAT0)); 2102#endif 2103 spin_unlock(&dev->lock); 2104 2105 return IRQ_HANDLED; 2106} 2107 2108static int net2272_present(struct net2272 *dev) 2109{ 2110 /* 2111 * Quick test to see if CPU can communicate properly with the NET2272. 2112 * Verifies connection using writes and reads to write/read and 2113 * read-only registers. 2114 * 2115 * This routine is strongly recommended especially during early bring-up 2116 * of new hardware, however for designs that do not apply Power On System 2117 * Tests (POST) it may discarded (or perhaps minimized). 2118 */ 2119 unsigned int ii; 2120 u8 val, refval; 2121 2122 /* Verify NET2272 write/read SCRATCH register can write and read */ 2123 refval = net2272_read(dev, SCRATCH); 2124 for (ii = 0; ii < 0x100; ii += 7) { 2125 net2272_write(dev, SCRATCH, ii); 2126 val = net2272_read(dev, SCRATCH); 2127 if (val != ii) { 2128 dev_dbg(dev->dev, 2129 "%s: write/read SCRATCH register test failed: " 2130 "wrote:0x%2.2x, read:0x%2.2x\n", 2131 __func__, ii, val); 2132 return -EINVAL; 2133 } 2134 } 2135 /* To be nice, we write the original SCRATCH value back: */ 2136 net2272_write(dev, SCRATCH, refval); 2137 2138 /* Verify NET2272 CHIPREV register is read-only: */ 2139 refval = net2272_read(dev, CHIPREV_2272); 2140 for (ii = 0; ii < 0x100; ii += 7) { 2141 net2272_write(dev, CHIPREV_2272, ii); 2142 val = net2272_read(dev, CHIPREV_2272); 2143 if (val != refval) { 2144 dev_dbg(dev->dev, 2145 "%s: write/read CHIPREV register test failed: " 2146 "wrote 0x%2.2x, read:0x%2.2x expected:0x%2.2x\n", 2147 __func__, ii, val, refval); 2148 return -EINVAL; 2149 } 2150 } 2151 2152 /* 2153 * Verify NET2272's "NET2270 legacy revision" register 2154 * - NET2272 has two revision registers. The NET2270 legacy revision 2155 * register should read the same value, regardless of the NET2272 2156 * silicon revision. The legacy register applies to NET2270 2157 * firmware being applied to the NET2272. 2158 */ 2159 val = net2272_read(dev, CHIPREV_LEGACY); 2160 if (val != NET2270_LEGACY_REV) { 2161 /* 2162 * Unexpected legacy revision value 2163 * - Perhaps the chip is a NET2270? 2164 */ 2165 dev_dbg(dev->dev, 2166 "%s: WARNING: UNEXPECTED NET2272 LEGACY REGISTER VALUE:\n" 2167 " - CHIPREV_LEGACY: expected 0x%2.2x, got:0x%2.2x. (Not NET2272?)\n", 2168 __func__, NET2270_LEGACY_REV, val); 2169 return -EINVAL; 2170 } 2171 2172 /* 2173 * Verify NET2272 silicon revision 2174 * - This revision register is appropriate for the silicon version 2175 * of the NET2272 2176 */ 2177 val = net2272_read(dev, CHIPREV_2272); 2178 switch (val) { 2179 case CHIPREV_NET2272_R1: 2180 /* 2181 * NET2272 Rev 1 has DMA related errata: 2182 * - Newer silicon (Rev 1A or better) required 2183 */ 2184 dev_dbg(dev->dev, 2185 "%s: Rev 1 detected: newer silicon recommended for DMA support\n", 2186 __func__); 2187 break; 2188 case CHIPREV_NET2272_R1A: 2189 break; 2190 default: 2191 /* NET2272 silicon version *may* not work with this firmware */ 2192 dev_dbg(dev->dev, 2193 "%s: unexpected silicon revision register value: " 2194 " CHIPREV_2272: 0x%2.2x\n", 2195 __func__, val); 2196 /* 2197 * Return Success, even though the chip rev is not an expected value 2198 * - Older, pre-built firmware can attempt to operate on newer silicon 2199 * - Often, new silicon is perfectly compatible 2200 */ 2201 } 2202 2203 /* Success: NET2272 checks out OK */ 2204 return 0; 2205} 2206 2207static void 2208net2272_gadget_release(struct device *_dev) 2209{ 2210 struct net2272 *dev = dev_get_drvdata(_dev); 2211 kfree(dev); 2212} 2213 2214/*---------------------------------------------------------------------------*/ 2215 2216static void 2217net2272_remove(struct net2272 *dev) 2218{ 2219 usb_del_gadget_udc(&dev->gadget); 2220 free_irq(dev->irq, dev); 2221 iounmap(dev->base_addr); 2222 device_remove_file(dev->dev, &dev_attr_registers); 2223 2224 dev_info(dev->dev, "unbind\n"); 2225} 2226 2227static struct net2272 *net2272_probe_init(struct device *dev, unsigned int irq) 2228{ 2229 struct net2272 *ret; 2230 2231 if (!irq) { 2232 dev_dbg(dev, "No IRQ!\n"); 2233 return ERR_PTR(-ENODEV); 2234 } 2235 2236 /* alloc, and start init */ 2237 ret = kzalloc(sizeof(*ret), GFP_KERNEL); 2238 if (!ret) 2239 return ERR_PTR(-ENOMEM); 2240 2241 spin_lock_init(&ret->lock); 2242 ret->irq = irq; 2243 ret->dev = dev; 2244 ret->gadget.ops = &net2272_ops; 2245 ret->gadget.max_speed = USB_SPEED_HIGH; 2246 2247 /* the "gadget" abstracts/virtualizes the controller */ 2248 ret->gadget.name = driver_name; 2249 2250 return ret; 2251} 2252 2253static int 2254net2272_probe_fin(struct net2272 *dev, unsigned int irqflags) 2255{ 2256 int ret; 2257 2258 /* See if there... */ 2259 if (net2272_present(dev)) { 2260 dev_warn(dev->dev, "2272 not found!\n"); 2261 ret = -ENODEV; 2262 goto err; 2263 } 2264 2265 net2272_usb_reset(dev); 2266 net2272_usb_reinit(dev); 2267 2268 ret = request_irq(dev->irq, net2272_irq, irqflags, driver_name, dev); 2269 if (ret) { 2270 dev_err(dev->dev, "request interrupt %i failed\n", dev->irq); 2271 goto err; 2272 } 2273 2274 dev->chiprev = net2272_read(dev, CHIPREV_2272); 2275 2276 /* done */ 2277 dev_info(dev->dev, "%s\n", driver_desc); 2278 dev_info(dev->dev, "irq %i, mem %p, chip rev %04x, dma %s\n", 2279 dev->irq, dev->base_addr, dev->chiprev, 2280 dma_mode_string()); 2281 dev_info(dev->dev, "version: %s\n", driver_vers); 2282 2283 ret = device_create_file(dev->dev, &dev_attr_registers); 2284 if (ret) 2285 goto err_irq; 2286 2287 ret = usb_add_gadget_udc_release(dev->dev, &dev->gadget, 2288 net2272_gadget_release); 2289 if (ret) 2290 goto err_add_udc; 2291 2292 return 0; 2293 2294err_add_udc: 2295 device_remove_file(dev->dev, &dev_attr_registers); 2296 err_irq: 2297 free_irq(dev->irq, dev); 2298 err: 2299 return ret; 2300} 2301 2302#ifdef CONFIG_PCI 2303 2304/* 2305 * wrap this driver around the specified device, but 2306 * don't respond over USB until a gadget driver binds to us 2307 */ 2308 2309static int 2310net2272_rdk1_probe(struct pci_dev *pdev, struct net2272 *dev) 2311{ 2312 unsigned long resource, len, tmp; 2313 void __iomem *mem_mapped_addr[4]; 2314 int ret, i; 2315 2316 /* 2317 * BAR 0 holds PLX 9054 config registers 2318 * BAR 1 is i/o memory; unused here 2319 * BAR 2 holds EPLD config registers 2320 * BAR 3 holds NET2272 registers 2321 */ 2322 2323 /* Find and map all address spaces */ 2324 for (i = 0; i < 4; ++i) { 2325 if (i == 1) 2326 continue; /* BAR1 unused */ 2327 2328 resource = pci_resource_start(pdev, i); 2329 len = pci_resource_len(pdev, i); 2330 2331 if (!request_mem_region(resource, len, driver_name)) { 2332 dev_dbg(dev->dev, "controller already in use\n"); 2333 ret = -EBUSY; 2334 goto err; 2335 } 2336 2337 mem_mapped_addr[i] = ioremap_nocache(resource, len); 2338 if (mem_mapped_addr[i] == NULL) { 2339 release_mem_region(resource, len); 2340 dev_dbg(dev->dev, "can't map memory\n"); 2341 ret = -EFAULT; 2342 goto err; 2343 } 2344 } 2345 2346 dev->rdk1.plx9054_base_addr = mem_mapped_addr[0]; 2347 dev->rdk1.epld_base_addr = mem_mapped_addr[2]; 2348 dev->base_addr = mem_mapped_addr[3]; 2349 2350 /* Set PLX 9054 bus width (16 bits) */ 2351 tmp = readl(dev->rdk1.plx9054_base_addr + LBRD1); 2352 writel((tmp & ~(3 << MEMORY_SPACE_LOCAL_BUS_WIDTH)) | W16_BIT, 2353 dev->rdk1.plx9054_base_addr + LBRD1); 2354 2355 /* Enable PLX 9054 Interrupts */ 2356 writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) | 2357 (1 << PCI_INTERRUPT_ENABLE) | 2358 (1 << LOCAL_INTERRUPT_INPUT_ENABLE), 2359 dev->rdk1.plx9054_base_addr + INTCSR); 2360 2361 writeb((1 << CHANNEL_CLEAR_INTERRUPT | (0 << CHANNEL_ENABLE)), 2362 dev->rdk1.plx9054_base_addr + DMACSR0); 2363 2364 /* reset */ 2365 writeb((1 << EPLD_DMA_ENABLE) | 2366 (1 << DMA_CTL_DACK) | 2367 (1 << DMA_TIMEOUT_ENABLE) | 2368 (1 << USER) | 2369 (0 << MPX_MODE) | 2370 (1 << BUSWIDTH) | 2371 (1 << NET2272_RESET), 2372 dev->base_addr + EPLD_IO_CONTROL_REGISTER); 2373 2374 mb(); 2375 writeb(readb(dev->base_addr + EPLD_IO_CONTROL_REGISTER) & 2376 ~(1 << NET2272_RESET), 2377 dev->base_addr + EPLD_IO_CONTROL_REGISTER); 2378 udelay(200); 2379 2380 return 0; 2381 2382 err: 2383 while (--i >= 0) { 2384 iounmap(mem_mapped_addr[i]); 2385 release_mem_region(pci_resource_start(pdev, i), 2386 pci_resource_len(pdev, i)); 2387 } 2388 2389 return ret; 2390} 2391 2392static int 2393net2272_rdk2_probe(struct pci_dev *pdev, struct net2272 *dev) 2394{ 2395 unsigned long resource, len; 2396 void __iomem *mem_mapped_addr[2]; 2397 int ret, i; 2398 2399 /* 2400 * BAR 0 holds FGPA config registers 2401 * BAR 1 holds NET2272 registers 2402 */ 2403 2404 /* Find and map all address spaces, bar2-3 unused in rdk 2 */ 2405 for (i = 0; i < 2; ++i) { 2406 resource = pci_resource_start(pdev, i); 2407 len = pci_resource_len(pdev, i); 2408 2409 if (!request_mem_region(resource, len, driver_name)) { 2410 dev_dbg(dev->dev, "controller already in use\n"); 2411 ret = -EBUSY; 2412 goto err; 2413 } 2414 2415 mem_mapped_addr[i] = ioremap_nocache(resource, len); 2416 if (mem_mapped_addr[i] == NULL) { 2417 release_mem_region(resource, len); 2418 dev_dbg(dev->dev, "can't map memory\n"); 2419 ret = -EFAULT; 2420 goto err; 2421 } 2422 } 2423 2424 dev->rdk2.fpga_base_addr = mem_mapped_addr[0]; 2425 dev->base_addr = mem_mapped_addr[1]; 2426 2427 mb(); 2428 /* Set 2272 bus width (16 bits) and reset */ 2429 writel((1 << CHIP_RESET), dev->rdk2.fpga_base_addr + RDK2_LOCCTLRDK); 2430 udelay(200); 2431 writel((1 << BUS_WIDTH), dev->rdk2.fpga_base_addr + RDK2_LOCCTLRDK); 2432 /* Print fpga version number */ 2433 dev_info(dev->dev, "RDK2 FPGA version %08x\n", 2434 readl(dev->rdk2.fpga_base_addr + RDK2_FPGAREV)); 2435 /* Enable FPGA Interrupts */ 2436 writel((1 << NET2272_PCI_IRQ), dev->rdk2.fpga_base_addr + RDK2_IRQENB); 2437 2438 return 0; 2439 2440 err: 2441 while (--i >= 0) { 2442 iounmap(mem_mapped_addr[i]); 2443 release_mem_region(pci_resource_start(pdev, i), 2444 pci_resource_len(pdev, i)); 2445 } 2446 2447 return ret; 2448} 2449 2450static int 2451net2272_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) 2452{ 2453 struct net2272 *dev; 2454 int ret; 2455 2456 dev = net2272_probe_init(&pdev->dev, pdev->irq); 2457 if (IS_ERR(dev)) 2458 return PTR_ERR(dev); 2459 dev->dev_id = pdev->device; 2460 2461 if (pci_enable_device(pdev) < 0) { 2462 ret = -ENODEV; 2463 goto err_free; 2464 } 2465 2466 pci_set_master(pdev); 2467 2468 switch (pdev->device) { 2469 case PCI_DEVICE_ID_RDK1: ret = net2272_rdk1_probe(pdev, dev); break; 2470 case PCI_DEVICE_ID_RDK2: ret = net2272_rdk2_probe(pdev, dev); break; 2471 default: BUG(); 2472 } 2473 if (ret) 2474 goto err_pci; 2475 2476 ret = net2272_probe_fin(dev, 0); 2477 if (ret) 2478 goto err_pci; 2479 2480 pci_set_drvdata(pdev, dev); 2481 2482 return 0; 2483 2484 err_pci: 2485 pci_disable_device(pdev); 2486 err_free: 2487 kfree(dev); 2488 2489 return ret; 2490} 2491 2492static void 2493net2272_rdk1_remove(struct pci_dev *pdev, struct net2272 *dev) 2494{ 2495 int i; 2496 2497 /* disable PLX 9054 interrupts */ 2498 writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) & 2499 ~(1 << PCI_INTERRUPT_ENABLE), 2500 dev->rdk1.plx9054_base_addr + INTCSR); 2501 2502 /* clean up resources allocated during probe() */ 2503 iounmap(dev->rdk1.plx9054_base_addr); 2504 iounmap(dev->rdk1.epld_base_addr); 2505 2506 for (i = 0; i < 4; ++i) { 2507 if (i == 1) 2508 continue; /* BAR1 unused */ 2509 release_mem_region(pci_resource_start(pdev, i), 2510 pci_resource_len(pdev, i)); 2511 } 2512} 2513 2514static void 2515net2272_rdk2_remove(struct pci_dev *pdev, struct net2272 *dev) 2516{ 2517 int i; 2518 2519 /* disable fpga interrupts 2520 writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) & 2521 ~(1 << PCI_INTERRUPT_ENABLE), 2522 dev->rdk1.plx9054_base_addr + INTCSR); 2523 */ 2524 2525 /* clean up resources allocated during probe() */ 2526 iounmap(dev->rdk2.fpga_base_addr); 2527 2528 for (i = 0; i < 2; ++i) 2529 release_mem_region(pci_resource_start(pdev, i), 2530 pci_resource_len(pdev, i)); 2531} 2532 2533static void 2534net2272_pci_remove(struct pci_dev *pdev) 2535{ 2536 struct net2272 *dev = pci_get_drvdata(pdev); 2537 2538 net2272_remove(dev); 2539 2540 switch (pdev->device) { 2541 case PCI_DEVICE_ID_RDK1: net2272_rdk1_remove(pdev, dev); break; 2542 case PCI_DEVICE_ID_RDK2: net2272_rdk2_remove(pdev, dev); break; 2543 default: BUG(); 2544 } 2545 2546 pci_disable_device(pdev); 2547 2548 kfree(dev); 2549} 2550 2551/* Table of matching PCI IDs */ 2552static struct pci_device_id pci_ids[] = { 2553 { /* RDK 1 card */ 2554 .class = ((PCI_CLASS_BRIDGE_OTHER << 8) | 0xfe), 2555 .class_mask = 0, 2556 .vendor = PCI_VENDOR_ID_PLX, 2557 .device = PCI_DEVICE_ID_RDK1, 2558 .subvendor = PCI_ANY_ID, 2559 .subdevice = PCI_ANY_ID, 2560 }, 2561 { /* RDK 2 card */ 2562 .class = ((PCI_CLASS_BRIDGE_OTHER << 8) | 0xfe), 2563 .class_mask = 0, 2564 .vendor = PCI_VENDOR_ID_PLX, 2565 .device = PCI_DEVICE_ID_RDK2, 2566 .subvendor = PCI_ANY_ID, 2567 .subdevice = PCI_ANY_ID, 2568 }, 2569 { } 2570}; 2571MODULE_DEVICE_TABLE(pci, pci_ids); 2572 2573static struct pci_driver net2272_pci_driver = { 2574 .name = driver_name, 2575 .id_table = pci_ids, 2576 2577 .probe = net2272_pci_probe, 2578 .remove = net2272_pci_remove, 2579}; 2580 2581static int net2272_pci_register(void) 2582{ 2583 return pci_register_driver(&net2272_pci_driver); 2584} 2585 2586static void net2272_pci_unregister(void) 2587{ 2588 pci_unregister_driver(&net2272_pci_driver); 2589} 2590 2591#else 2592static inline int net2272_pci_register(void) { return 0; } 2593static inline void net2272_pci_unregister(void) { } 2594#endif 2595 2596/*---------------------------------------------------------------------------*/ 2597 2598static int 2599net2272_plat_probe(struct platform_device *pdev) 2600{ 2601 struct net2272 *dev; 2602 int ret; 2603 unsigned int irqflags; 2604 resource_size_t base, len; 2605 struct resource *iomem, *iomem_bus, *irq_res; 2606 2607 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 2608 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 2609 iomem_bus = platform_get_resource(pdev, IORESOURCE_BUS, 0); 2610 if (!irq_res || !iomem) { 2611 dev_err(&pdev->dev, "must provide irq/base addr"); 2612 return -EINVAL; 2613 } 2614 2615 dev = net2272_probe_init(&pdev->dev, irq_res->start); 2616 if (IS_ERR(dev)) 2617 return PTR_ERR(dev); 2618 2619 irqflags = 0; 2620 if (irq_res->flags & IORESOURCE_IRQ_HIGHEDGE) 2621 irqflags |= IRQF_TRIGGER_RISING; 2622 if (irq_res->flags & IORESOURCE_IRQ_LOWEDGE) 2623 irqflags |= IRQF_TRIGGER_FALLING; 2624 if (irq_res->flags & IORESOURCE_IRQ_HIGHLEVEL) 2625 irqflags |= IRQF_TRIGGER_HIGH; 2626 if (irq_res->flags & IORESOURCE_IRQ_LOWLEVEL) 2627 irqflags |= IRQF_TRIGGER_LOW; 2628 2629 base = iomem->start; 2630 len = resource_size(iomem); 2631 if (iomem_bus) 2632 dev->base_shift = iomem_bus->start; 2633 2634 if (!request_mem_region(base, len, driver_name)) { 2635 dev_dbg(dev->dev, "get request memory region!\n"); 2636 ret = -EBUSY; 2637 goto err; 2638 } 2639 dev->base_addr = ioremap_nocache(base, len); 2640 if (!dev->base_addr) { 2641 dev_dbg(dev->dev, "can't map memory\n"); 2642 ret = -EFAULT; 2643 goto err_req; 2644 } 2645 2646 ret = net2272_probe_fin(dev, IRQF_TRIGGER_LOW); 2647 if (ret) 2648 goto err_io; 2649 2650 platform_set_drvdata(pdev, dev); 2651 dev_info(&pdev->dev, "running in 16-bit, %sbyte swap local bus mode\n", 2652 (net2272_read(dev, LOCCTL) & (1 << BYTE_SWAP)) ? "" : "no "); 2653 2654 return 0; 2655 2656 err_io: 2657 iounmap(dev->base_addr); 2658 err_req: 2659 release_mem_region(base, len); 2660 err: 2661 return ret; 2662} 2663 2664static int 2665net2272_plat_remove(struct platform_device *pdev) 2666{ 2667 struct net2272 *dev = platform_get_drvdata(pdev); 2668 2669 net2272_remove(dev); 2670 2671 release_mem_region(pdev->resource[0].start, 2672 resource_size(&pdev->resource[0])); 2673 2674 kfree(dev); 2675 2676 return 0; 2677} 2678 2679static struct platform_driver net2272_plat_driver = { 2680 .probe = net2272_plat_probe, 2681 .remove = net2272_plat_remove, 2682 .driver = { 2683 .name = driver_name, 2684 }, 2685 /* FIXME .suspend, .resume */ 2686}; 2687MODULE_ALIAS("platform:net2272"); 2688 2689static int __init net2272_init(void) 2690{ 2691 int ret; 2692 2693 ret = net2272_pci_register(); 2694 if (ret) 2695 return ret; 2696 ret = platform_driver_register(&net2272_plat_driver); 2697 if (ret) 2698 goto err_pci; 2699 return ret; 2700 2701err_pci: 2702 net2272_pci_unregister(); 2703 return ret; 2704} 2705module_init(net2272_init); 2706 2707static void __exit net2272_cleanup(void) 2708{ 2709 net2272_pci_unregister(); 2710 platform_driver_unregister(&net2272_plat_driver); 2711} 2712module_exit(net2272_cleanup); 2713 2714MODULE_DESCRIPTION(DRIVER_DESC); 2715MODULE_AUTHOR("PLX Technology, Inc."); 2716MODULE_LICENSE("GPL"); 2717