1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Driver for the PLX NET2280 USB device controller. 4 * Specs and errata are available from <http://www.plxtech.com>. 5 * 6 * PLX Technology Inc. (formerly NetChip Technology) supported the 7 * development of this driver. 8 * 9 * 10 * CODE STATUS HIGHLIGHTS 11 * 12 * This driver should work well with most "gadget" drivers, including 13 * the Mass Storage, Serial, and Ethernet/RNDIS gadget drivers 14 * as well as Gadget Zero and Gadgetfs. 15 * 16 * DMA is enabled by default. 17 * 18 * MSI is enabled by default. The legacy IRQ is used if MSI couldn't 19 * be enabled. 20 * 21 * Note that almost all the errata workarounds here are only needed for 22 * rev1 chips. Rev1a silicon (0110) fixes almost all of them. 23 */ 24 25 /* 26 * Copyright (C) 2003 David Brownell 27 * Copyright (C) 2003-2005 PLX Technology, Inc. 28 * Copyright (C) 2014 Ricardo Ribalda - Qtechnology/AS 29 * 30 * Modified Seth Levy 2005 PLX Technology, Inc. to provide compatibility 31 * with 2282 chip 32 * 33 * Modified Ricardo Ribalda Qtechnology AS to provide compatibility 34 * with usb 338x chip. Based on PLX driver 35 */ 36 37 #include <linux/module.h> 38 #include <linux/pci.h> 39 #include <linux/dma-mapping.h> 40 #include <linux/kernel.h> 41 #include <linux/delay.h> 42 #include <linux/ioport.h> 43 #include <linux/slab.h> 44 #include <linux/errno.h> 45 #include <linux/init.h> 46 #include <linux/timer.h> 47 #include <linux/list.h> 48 #include <linux/interrupt.h> 49 #include <linux/moduleparam.h> 50 #include <linux/device.h> 51 #include <linux/usb/ch9.h> 52 #include <linux/usb/gadget.h> 53 #include <linux/prefetch.h> 54 #include <linux/io.h> 55 56 #include <asm/byteorder.h> 57 #include <asm/irq.h> 58 #include <asm/unaligned.h> 59 60 #define DRIVER_DESC "PLX NET228x/USB338x USB Peripheral Controller" 61 #define DRIVER_VERSION "2005 Sept 27/v3.0" 62 63 #define EP_DONTUSE 13 /* nonzero */ 64 65 #define USE_RDK_LEDS /* GPIO pins control three LEDs */ 66 67 68 static const char driver_name[] = "net2280"; 69 static const char driver_desc[] = DRIVER_DESC; 70 71 static const u32 ep_bit[9] = { 0, 17, 2, 19, 4, 1, 18, 3, 20 }; 72 static const char ep0name[] = "ep0"; 73 74 #define EP_INFO(_name, _caps) \ 75 { \ 76 .name = _name, \ 77 .caps = _caps, \ 78 } 79 80 static const struct { 81 const char *name; 82 const struct usb_ep_caps caps; 83 } ep_info_dft[] = { /* Default endpoint configuration */ 84 EP_INFO(ep0name, 85 USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL, USB_EP_CAPS_DIR_ALL)), 86 EP_INFO("ep-a", 87 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)), 88 EP_INFO("ep-b", 89 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)), 90 EP_INFO("ep-c", 91 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)), 92 EP_INFO("ep-d", 93 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)), 94 EP_INFO("ep-e", 95 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)), 96 EP_INFO("ep-f", 97 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)), 98 EP_INFO("ep-g", 99 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)), 100 EP_INFO("ep-h", 101 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)), 102 }, ep_info_adv[] = { /* Endpoints for usb3380 advance mode */ 103 EP_INFO(ep0name, 104 USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL, USB_EP_CAPS_DIR_ALL)), 105 EP_INFO("ep1in", 106 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)), 107 EP_INFO("ep2out", 108 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)), 109 EP_INFO("ep3in", 110 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)), 111 EP_INFO("ep4out", 112 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)), 113 EP_INFO("ep1out", 114 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)), 115 EP_INFO("ep2in", 116 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)), 117 EP_INFO("ep3out", 118 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)), 119 EP_INFO("ep4in", 120 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)), 121 }; 122 123 #undef EP_INFO 124 125 /* mode 0 == ep-{a,b,c,d} 1K fifo each 126 * mode 1 == ep-{a,b} 2K fifo each, ep-{c,d} unavailable 127 * mode 2 == ep-a 2K fifo, ep-{b,c} 1K each, ep-d unavailable 128 */ 129 static ushort fifo_mode; 130 131 /* "modprobe net2280 fifo_mode=1" etc */ 132 module_param(fifo_mode, ushort, 0644); 133 134 /* enable_suspend -- When enabled, the driver will respond to 135 * USB suspend requests by powering down the NET2280. Otherwise, 136 * USB suspend requests will be ignored. This is acceptable for 137 * self-powered devices 138 */ 139 static bool enable_suspend; 140 141 /* "modprobe net2280 enable_suspend=1" etc */ 142 module_param(enable_suspend, bool, 0444); 143 144 #define DIR_STRING(bAddress) (((bAddress) & USB_DIR_IN) ? "in" : "out") 145 146 static char *type_string(u8 bmAttributes) 147 { 148 switch ((bmAttributes) & USB_ENDPOINT_XFERTYPE_MASK) { 149 case USB_ENDPOINT_XFER_BULK: return "bulk"; 150 case USB_ENDPOINT_XFER_ISOC: return "iso"; 151 case USB_ENDPOINT_XFER_INT: return "intr"; 152 } 153 return "control"; 154 } 155 156 #include "net2280.h" 157 158 #define valid_bit cpu_to_le32(BIT(VALID_BIT)) 159 #define dma_done_ie cpu_to_le32(BIT(DMA_DONE_INTERRUPT_ENABLE)) 160 161 static void ep_clear_seqnum(struct net2280_ep *ep); 162 static void stop_activity(struct net2280 *dev, 163 struct usb_gadget_driver *driver); 164 static void ep0_start(struct net2280 *dev); 165 166 /*-------------------------------------------------------------------------*/ 167 static inline void enable_pciirqenb(struct net2280_ep *ep) 168 { 169 u32 tmp = readl(&ep->dev->regs->pciirqenb0); 170 171 if (ep->dev->quirks & PLX_LEGACY) 172 tmp |= BIT(ep->num); 173 else 174 tmp |= BIT(ep_bit[ep->num]); 175 writel(tmp, &ep->dev->regs->pciirqenb0); 176 177 return; 178 } 179 180 static int 181 net2280_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) 182 { 183 struct net2280 *dev; 184 struct net2280_ep *ep; 185 u32 max; 186 u32 tmp = 0; 187 u32 type; 188 unsigned long flags; 189 static const u32 ep_key[9] = { 1, 0, 1, 0, 1, 1, 0, 1, 0 }; 190 int ret = 0; 191 192 ep = container_of(_ep, struct net2280_ep, ep); 193 if (!_ep || !desc || ep->desc || _ep->name == ep0name || 194 desc->bDescriptorType != USB_DT_ENDPOINT) { 195 pr_err("%s: failed at line=%d\n", __func__, __LINE__); 196 return -EINVAL; 197 } 198 dev = ep->dev; 199 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) { 200 ret = -ESHUTDOWN; 201 goto print_err; 202 } 203 204 /* erratum 0119 workaround ties up an endpoint number */ 205 if ((desc->bEndpointAddress & 0x0f) == EP_DONTUSE) { 206 ret = -EDOM; 207 goto print_err; 208 } 209 210 if (dev->quirks & PLX_PCIE) { 211 if ((desc->bEndpointAddress & 0x0f) >= 0x0c) { 212 ret = -EDOM; 213 goto print_err; 214 } 215 ep->is_in = !!usb_endpoint_dir_in(desc); 216 if (dev->enhanced_mode && ep->is_in && ep_key[ep->num]) { 217 ret = -EINVAL; 218 goto print_err; 219 } 220 } 221 222 /* sanity check ep-e/ep-f since their fifos are small */ 223 max = usb_endpoint_maxp(desc); 224 if (ep->num > 4 && max > 64 && (dev->quirks & PLX_LEGACY)) { 225 ret = -ERANGE; 226 goto print_err; 227 } 228 229 spin_lock_irqsave(&dev->lock, flags); 230 _ep->maxpacket = max; 231 ep->desc = desc; 232 233 /* ep_reset() has already been called */ 234 ep->stopped = 0; 235 ep->wedged = 0; 236 ep->out_overflow = 0; 237 238 /* set speed-dependent max packet; may kick in high bandwidth */ 239 set_max_speed(ep, max); 240 241 /* set type, direction, address; reset fifo counters */ 242 writel(BIT(FIFO_FLUSH), &ep->regs->ep_stat); 243 244 if ((dev->quirks & PLX_PCIE) && dev->enhanced_mode) { 245 tmp = readl(&ep->cfg->ep_cfg); 246 /* If USB ep number doesn't match hardware ep number */ 247 if ((tmp & 0xf) != usb_endpoint_num(desc)) { 248 ret = -EINVAL; 249 spin_unlock_irqrestore(&dev->lock, flags); 250 goto print_err; 251 } 252 if (ep->is_in) 253 tmp &= ~USB3380_EP_CFG_MASK_IN; 254 else 255 tmp &= ~USB3380_EP_CFG_MASK_OUT; 256 } 257 type = (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK); 258 if (type == USB_ENDPOINT_XFER_INT) { 259 /* erratum 0105 workaround prevents hs NYET */ 260 if (dev->chiprev == 0100 && 261 dev->gadget.speed == USB_SPEED_HIGH && 262 !(desc->bEndpointAddress & USB_DIR_IN)) 263 writel(BIT(CLEAR_NAK_OUT_PACKETS_MODE), 264 &ep->regs->ep_rsp); 265 } else if (type == USB_ENDPOINT_XFER_BULK) { 266 /* catch some particularly blatant driver bugs */ 267 if ((dev->gadget.speed == USB_SPEED_SUPER && max != 1024) || 268 (dev->gadget.speed == USB_SPEED_HIGH && max != 512) || 269 (dev->gadget.speed == USB_SPEED_FULL && max > 64)) { 270 spin_unlock_irqrestore(&dev->lock, flags); 271 ret = -ERANGE; 272 goto print_err; 273 } 274 } 275 ep->is_iso = (type == USB_ENDPOINT_XFER_ISOC); 276 /* Enable this endpoint */ 277 if (dev->quirks & PLX_LEGACY) { 278 tmp |= type << ENDPOINT_TYPE; 279 tmp |= desc->bEndpointAddress; 280 /* default full fifo lines */ 281 tmp |= (4 << ENDPOINT_BYTE_COUNT); 282 tmp |= BIT(ENDPOINT_ENABLE); 283 ep->is_in = (tmp & USB_DIR_IN) != 0; 284 } else { 285 /* In Legacy mode, only OUT endpoints are used */ 286 if (dev->enhanced_mode && ep->is_in) { 287 tmp |= type << IN_ENDPOINT_TYPE; 288 tmp |= BIT(IN_ENDPOINT_ENABLE); 289 } else { 290 tmp |= type << OUT_ENDPOINT_TYPE; 291 tmp |= BIT(OUT_ENDPOINT_ENABLE); 292 tmp |= (ep->is_in << ENDPOINT_DIRECTION); 293 } 294 295 tmp |= (4 << ENDPOINT_BYTE_COUNT); 296 if (!dev->enhanced_mode) 297 tmp |= usb_endpoint_num(desc); 298 tmp |= (ep->ep.maxburst << MAX_BURST_SIZE); 299 } 300 301 /* Make sure all the registers are written before ep_rsp*/ 302 wmb(); 303 304 /* for OUT transfers, block the rx fifo until a read is posted */ 305 if (!ep->is_in) 306 writel(BIT(SET_NAK_OUT_PACKETS), &ep->regs->ep_rsp); 307 else if (!(dev->quirks & PLX_2280)) { 308 /* Added for 2282, Don't use nak packets on an in endpoint, 309 * this was ignored on 2280 310 */ 311 writel(BIT(CLEAR_NAK_OUT_PACKETS) | 312 BIT(CLEAR_NAK_OUT_PACKETS_MODE), &ep->regs->ep_rsp); 313 } 314 315 if (dev->quirks & PLX_PCIE) 316 ep_clear_seqnum(ep); 317 writel(tmp, &ep->cfg->ep_cfg); 318 319 /* enable irqs */ 320 if (!ep->dma) { /* pio, per-packet */ 321 enable_pciirqenb(ep); 322 323 tmp = BIT(DATA_PACKET_RECEIVED_INTERRUPT_ENABLE) | 324 BIT(DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE); 325 if (dev->quirks & PLX_2280) 326 tmp |= readl(&ep->regs->ep_irqenb); 327 writel(tmp, &ep->regs->ep_irqenb); 328 } else { /* dma, per-request */ 329 tmp = BIT((8 + ep->num)); /* completion */ 330 tmp |= readl(&dev->regs->pciirqenb1); 331 writel(tmp, &dev->regs->pciirqenb1); 332 333 /* for short OUT transfers, dma completions can't 334 * advance the queue; do it pio-style, by hand. 335 * NOTE erratum 0112 workaround #2 336 */ 337 if ((desc->bEndpointAddress & USB_DIR_IN) == 0) { 338 tmp = BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT_ENABLE); 339 writel(tmp, &ep->regs->ep_irqenb); 340 341 enable_pciirqenb(ep); 342 } 343 } 344 345 tmp = desc->bEndpointAddress; 346 ep_dbg(dev, "enabled %s (ep%d%s-%s) %s max %04x\n", 347 _ep->name, tmp & 0x0f, DIR_STRING(tmp), 348 type_string(desc->bmAttributes), 349 ep->dma ? "dma" : "pio", max); 350 351 /* pci writes may still be posted */ 352 spin_unlock_irqrestore(&dev->lock, flags); 353 return ret; 354 355 print_err: 356 dev_err(&ep->dev->pdev->dev, "%s: error=%d\n", __func__, ret); 357 return ret; 358 } 359 360 static int handshake(u32 __iomem *ptr, u32 mask, u32 done, int usec) 361 { 362 u32 result; 363 364 do { 365 result = readl(ptr); 366 if (result == ~(u32)0) /* "device unplugged" */ 367 return -ENODEV; 368 result &= mask; 369 if (result == done) 370 return 0; 371 udelay(1); 372 usec--; 373 } while (usec > 0); 374 return -ETIMEDOUT; 375 } 376 377 static const struct usb_ep_ops net2280_ep_ops; 378 379 static void ep_reset_228x(struct net2280_regs __iomem *regs, 380 struct net2280_ep *ep) 381 { 382 u32 tmp; 383 384 ep->desc = NULL; 385 INIT_LIST_HEAD(&ep->queue); 386 387 usb_ep_set_maxpacket_limit(&ep->ep, ~0); 388 ep->ep.ops = &net2280_ep_ops; 389 390 /* disable the dma, irqs, endpoint... */ 391 if (ep->dma) { 392 writel(0, &ep->dma->dmactl); 393 writel(BIT(DMA_SCATTER_GATHER_DONE_INTERRUPT) | 394 BIT(DMA_TRANSACTION_DONE_INTERRUPT) | 395 BIT(DMA_ABORT), 396 &ep->dma->dmastat); 397 398 tmp = readl(®s->pciirqenb0); 399 tmp &= ~BIT(ep->num); 400 writel(tmp, ®s->pciirqenb0); 401 } else { 402 tmp = readl(®s->pciirqenb1); 403 tmp &= ~BIT((8 + ep->num)); /* completion */ 404 writel(tmp, ®s->pciirqenb1); 405 } 406 writel(0, &ep->regs->ep_irqenb); 407 408 /* init to our chosen defaults, notably so that we NAK OUT 409 * packets until the driver queues a read (+note erratum 0112) 410 */ 411 if (!ep->is_in || (ep->dev->quirks & PLX_2280)) { 412 tmp = BIT(SET_NAK_OUT_PACKETS_MODE) | 413 BIT(SET_NAK_OUT_PACKETS) | 414 BIT(CLEAR_EP_HIDE_STATUS_PHASE) | 415 BIT(CLEAR_INTERRUPT_MODE); 416 } else { 417 /* added for 2282 */ 418 tmp = BIT(CLEAR_NAK_OUT_PACKETS_MODE) | 419 BIT(CLEAR_NAK_OUT_PACKETS) | 420 BIT(CLEAR_EP_HIDE_STATUS_PHASE) | 421 BIT(CLEAR_INTERRUPT_MODE); 422 } 423 424 if (ep->num != 0) { 425 tmp |= BIT(CLEAR_ENDPOINT_TOGGLE) | 426 BIT(CLEAR_ENDPOINT_HALT); 427 } 428 writel(tmp, &ep->regs->ep_rsp); 429 430 /* scrub most status bits, and flush any fifo state */ 431 if (ep->dev->quirks & PLX_2280) 432 tmp = BIT(FIFO_OVERFLOW) | 433 BIT(FIFO_UNDERFLOW); 434 else 435 tmp = 0; 436 437 writel(tmp | BIT(TIMEOUT) | 438 BIT(USB_STALL_SENT) | 439 BIT(USB_IN_NAK_SENT) | 440 BIT(USB_IN_ACK_RCVD) | 441 BIT(USB_OUT_PING_NAK_SENT) | 442 BIT(USB_OUT_ACK_SENT) | 443 BIT(FIFO_FLUSH) | 444 BIT(SHORT_PACKET_OUT_DONE_INTERRUPT) | 445 BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT) | 446 BIT(DATA_PACKET_RECEIVED_INTERRUPT) | 447 BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) | 448 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | 449 BIT(DATA_IN_TOKEN_INTERRUPT), 450 &ep->regs->ep_stat); 451 452 /* fifo size is handled separately */ 453 } 454 455 static void ep_reset_338x(struct net2280_regs __iomem *regs, 456 struct net2280_ep *ep) 457 { 458 u32 tmp, dmastat; 459 460 ep->desc = NULL; 461 INIT_LIST_HEAD(&ep->queue); 462 463 usb_ep_set_maxpacket_limit(&ep->ep, ~0); 464 ep->ep.ops = &net2280_ep_ops; 465 466 /* disable the dma, irqs, endpoint... */ 467 if (ep->dma) { 468 writel(0, &ep->dma->dmactl); 469 writel(BIT(DMA_ABORT_DONE_INTERRUPT) | 470 BIT(DMA_PAUSE_DONE_INTERRUPT) | 471 BIT(DMA_SCATTER_GATHER_DONE_INTERRUPT) | 472 BIT(DMA_TRANSACTION_DONE_INTERRUPT), 473 /* | BIT(DMA_ABORT), */ 474 &ep->dma->dmastat); 475 476 dmastat = readl(&ep->dma->dmastat); 477 if (dmastat == 0x5002) { 478 ep_warn(ep->dev, "The dmastat return = %x!!\n", 479 dmastat); 480 writel(0x5a, &ep->dma->dmastat); 481 } 482 483 tmp = readl(®s->pciirqenb0); 484 tmp &= ~BIT(ep_bit[ep->num]); 485 writel(tmp, ®s->pciirqenb0); 486 } else { 487 if (ep->num < 5) { 488 tmp = readl(®s->pciirqenb1); 489 tmp &= ~BIT((8 + ep->num)); /* completion */ 490 writel(tmp, ®s->pciirqenb1); 491 } 492 } 493 writel(0, &ep->regs->ep_irqenb); 494 495 writel(BIT(SHORT_PACKET_OUT_DONE_INTERRUPT) | 496 BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT) | 497 BIT(FIFO_OVERFLOW) | 498 BIT(DATA_PACKET_RECEIVED_INTERRUPT) | 499 BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) | 500 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | 501 BIT(DATA_IN_TOKEN_INTERRUPT), &ep->regs->ep_stat); 502 503 tmp = readl(&ep->cfg->ep_cfg); 504 if (ep->is_in) 505 tmp &= ~USB3380_EP_CFG_MASK_IN; 506 else 507 tmp &= ~USB3380_EP_CFG_MASK_OUT; 508 writel(tmp, &ep->cfg->ep_cfg); 509 } 510 511 static void nuke(struct net2280_ep *); 512 513 static int net2280_disable(struct usb_ep *_ep) 514 { 515 struct net2280_ep *ep; 516 unsigned long flags; 517 518 ep = container_of(_ep, struct net2280_ep, ep); 519 if (!_ep || _ep->name == ep0name) { 520 pr_err("%s: Invalid ep=%p\n", __func__, _ep); 521 return -EINVAL; 522 } 523 spin_lock_irqsave(&ep->dev->lock, flags); 524 nuke(ep); 525 526 if (ep->dev->quirks & PLX_PCIE) 527 ep_reset_338x(ep->dev->regs, ep); 528 else 529 ep_reset_228x(ep->dev->regs, ep); 530 531 ep_vdbg(ep->dev, "disabled %s %s\n", 532 ep->dma ? "dma" : "pio", _ep->name); 533 534 /* synch memory views with the device */ 535 (void)readl(&ep->cfg->ep_cfg); 536 537 if (!ep->dma && ep->num >= 1 && ep->num <= 4) 538 ep->dma = &ep->dev->dma[ep->num - 1]; 539 540 spin_unlock_irqrestore(&ep->dev->lock, flags); 541 return 0; 542 } 543 544 /*-------------------------------------------------------------------------*/ 545 546 static struct usb_request 547 *net2280_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) 548 { 549 struct net2280_ep *ep; 550 struct net2280_request *req; 551 552 if (!_ep) { 553 pr_err("%s: Invalid ep\n", __func__); 554 return NULL; 555 } 556 ep = container_of(_ep, struct net2280_ep, ep); 557 558 req = kzalloc(sizeof(*req), gfp_flags); 559 if (!req) 560 return NULL; 561 562 INIT_LIST_HEAD(&req->queue); 563 564 /* this dma descriptor may be swapped with the previous dummy */ 565 if (ep->dma) { 566 struct net2280_dma *td; 567 568 td = dma_pool_alloc(ep->dev->requests, gfp_flags, 569 &req->td_dma); 570 if (!td) { 571 kfree(req); 572 return NULL; 573 } 574 td->dmacount = 0; /* not VALID */ 575 td->dmadesc = td->dmaaddr; 576 req->td = td; 577 } 578 return &req->req; 579 } 580 581 static void net2280_free_request(struct usb_ep *_ep, struct usb_request *_req) 582 { 583 struct net2280_ep *ep; 584 struct net2280_request *req; 585 586 ep = container_of(_ep, struct net2280_ep, ep); 587 if (!_ep || !_req) { 588 dev_err(&ep->dev->pdev->dev, "%s: Invalid ep=%p or req=%p\n", 589 __func__, _ep, _req); 590 return; 591 } 592 593 req = container_of(_req, struct net2280_request, req); 594 WARN_ON(!list_empty(&req->queue)); 595 if (req->td) 596 dma_pool_free(ep->dev->requests, req->td, req->td_dma); 597 kfree(req); 598 } 599 600 /*-------------------------------------------------------------------------*/ 601 602 /* load a packet into the fifo we use for usb IN transfers. 603 * works for all endpoints. 604 * 605 * NOTE: pio with ep-a..ep-d could stuff multiple packets into the fifo 606 * at a time, but this code is simpler because it knows it only writes 607 * one packet. ep-a..ep-d should use dma instead. 608 */ 609 static void write_fifo(struct net2280_ep *ep, struct usb_request *req) 610 { 611 struct net2280_ep_regs __iomem *regs = ep->regs; 612 u8 *buf; 613 u32 tmp; 614 unsigned count, total; 615 616 /* INVARIANT: fifo is currently empty. (testable) */ 617 618 if (req) { 619 buf = req->buf + req->actual; 620 prefetch(buf); 621 total = req->length - req->actual; 622 } else { 623 total = 0; 624 buf = NULL; 625 } 626 627 /* write just one packet at a time */ 628 count = ep->ep.maxpacket; 629 if (count > total) /* min() cannot be used on a bitfield */ 630 count = total; 631 632 ep_vdbg(ep->dev, "write %s fifo (IN) %d bytes%s req %p\n", 633 ep->ep.name, count, 634 (count != ep->ep.maxpacket) ? " (short)" : "", 635 req); 636 while (count >= 4) { 637 /* NOTE be careful if you try to align these. fifo lines 638 * should normally be full (4 bytes) and successive partial 639 * lines are ok only in certain cases. 640 */ 641 tmp = get_unaligned((u32 *)buf); 642 cpu_to_le32s(&tmp); 643 writel(tmp, ®s->ep_data); 644 buf += 4; 645 count -= 4; 646 } 647 648 /* last fifo entry is "short" unless we wrote a full packet. 649 * also explicitly validate last word in (periodic) transfers 650 * when maxpacket is not a multiple of 4 bytes. 651 */ 652 if (count || total < ep->ep.maxpacket) { 653 tmp = count ? get_unaligned((u32 *)buf) : count; 654 cpu_to_le32s(&tmp); 655 set_fifo_bytecount(ep, count & 0x03); 656 writel(tmp, ®s->ep_data); 657 } 658 659 /* pci writes may still be posted */ 660 } 661 662 /* work around erratum 0106: PCI and USB race over the OUT fifo. 663 * caller guarantees chiprev 0100, out endpoint is NAKing, and 664 * there's no real data in the fifo. 665 * 666 * NOTE: also used in cases where that erratum doesn't apply: 667 * where the host wrote "too much" data to us. 668 */ 669 static void out_flush(struct net2280_ep *ep) 670 { 671 u32 __iomem *statp; 672 u32 tmp; 673 674 statp = &ep->regs->ep_stat; 675 676 tmp = readl(statp); 677 if (tmp & BIT(NAK_OUT_PACKETS)) { 678 ep_dbg(ep->dev, "%s %s %08x !NAK\n", 679 ep->ep.name, __func__, tmp); 680 writel(BIT(SET_NAK_OUT_PACKETS), &ep->regs->ep_rsp); 681 } 682 683 writel(BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | 684 BIT(DATA_PACKET_RECEIVED_INTERRUPT), 685 statp); 686 writel(BIT(FIFO_FLUSH), statp); 687 /* Make sure that stap is written */ 688 mb(); 689 tmp = readl(statp); 690 if (tmp & BIT(DATA_OUT_PING_TOKEN_INTERRUPT) && 691 /* high speed did bulk NYET; fifo isn't filling */ 692 ep->dev->gadget.speed == USB_SPEED_FULL) { 693 unsigned usec; 694 695 usec = 50; /* 64 byte bulk/interrupt */ 696 handshake(statp, BIT(USB_OUT_PING_NAK_SENT), 697 BIT(USB_OUT_PING_NAK_SENT), usec); 698 /* NAK done; now CLEAR_NAK_OUT_PACKETS is safe */ 699 } 700 } 701 702 /* unload packet(s) from the fifo we use for usb OUT transfers. 703 * returns true iff the request completed, because of short packet 704 * or the request buffer having filled with full packets. 705 * 706 * for ep-a..ep-d this will read multiple packets out when they 707 * have been accepted. 708 */ 709 static int read_fifo(struct net2280_ep *ep, struct net2280_request *req) 710 { 711 struct net2280_ep_regs __iomem *regs = ep->regs; 712 u8 *buf = req->req.buf + req->req.actual; 713 unsigned count, tmp, is_short; 714 unsigned cleanup = 0, prevent = 0; 715 716 /* erratum 0106 ... packets coming in during fifo reads might 717 * be incompletely rejected. not all cases have workarounds. 718 */ 719 if (ep->dev->chiprev == 0x0100 && 720 ep->dev->gadget.speed == USB_SPEED_FULL) { 721 udelay(1); 722 tmp = readl(&ep->regs->ep_stat); 723 if ((tmp & BIT(NAK_OUT_PACKETS))) 724 cleanup = 1; 725 else if ((tmp & BIT(FIFO_FULL))) { 726 start_out_naking(ep); 727 prevent = 1; 728 } 729 /* else: hope we don't see the problem */ 730 } 731 732 /* never overflow the rx buffer. the fifo reads packets until 733 * it sees a short one; we might not be ready for them all. 734 */ 735 prefetchw(buf); 736 count = readl(®s->ep_avail); 737 if (unlikely(count == 0)) { 738 udelay(1); 739 tmp = readl(&ep->regs->ep_stat); 740 count = readl(®s->ep_avail); 741 /* handled that data already? */ 742 if (count == 0 && (tmp & BIT(NAK_OUT_PACKETS)) == 0) 743 return 0; 744 } 745 746 tmp = req->req.length - req->req.actual; 747 if (count > tmp) { 748 /* as with DMA, data overflow gets flushed */ 749 if ((tmp % ep->ep.maxpacket) != 0) { 750 ep_err(ep->dev, 751 "%s out fifo %d bytes, expected %d\n", 752 ep->ep.name, count, tmp); 753 req->req.status = -EOVERFLOW; 754 cleanup = 1; 755 /* NAK_OUT_PACKETS will be set, so flushing is safe; 756 * the next read will start with the next packet 757 */ 758 } /* else it's a ZLP, no worries */ 759 count = tmp; 760 } 761 req->req.actual += count; 762 763 is_short = (count == 0) || ((count % ep->ep.maxpacket) != 0); 764 765 ep_vdbg(ep->dev, "read %s fifo (OUT) %d bytes%s%s%s req %p %d/%d\n", 766 ep->ep.name, count, is_short ? " (short)" : "", 767 cleanup ? " flush" : "", prevent ? " nak" : "", 768 req, req->req.actual, req->req.length); 769 770 while (count >= 4) { 771 tmp = readl(®s->ep_data); 772 cpu_to_le32s(&tmp); 773 put_unaligned(tmp, (u32 *)buf); 774 buf += 4; 775 count -= 4; 776 } 777 if (count) { 778 tmp = readl(®s->ep_data); 779 /* LE conversion is implicit here: */ 780 do { 781 *buf++ = (u8) tmp; 782 tmp >>= 8; 783 } while (--count); 784 } 785 if (cleanup) 786 out_flush(ep); 787 if (prevent) { 788 writel(BIT(CLEAR_NAK_OUT_PACKETS), &ep->regs->ep_rsp); 789 (void) readl(&ep->regs->ep_rsp); 790 } 791 792 return is_short || ((req->req.actual == req->req.length) && 793 !req->req.zero); 794 } 795 796 /* fill out dma descriptor to match a given request */ 797 static void fill_dma_desc(struct net2280_ep *ep, 798 struct net2280_request *req, int valid) 799 { 800 struct net2280_dma *td = req->td; 801 u32 dmacount = req->req.length; 802 803 /* don't let DMA continue after a short OUT packet, 804 * so overruns can't affect the next transfer. 805 * in case of overruns on max-size packets, we can't 806 * stop the fifo from filling but we can flush it. 807 */ 808 if (ep->is_in) 809 dmacount |= BIT(DMA_DIRECTION); 810 if ((!ep->is_in && (dmacount % ep->ep.maxpacket) != 0) || 811 !(ep->dev->quirks & PLX_2280)) 812 dmacount |= BIT(END_OF_CHAIN); 813 814 req->valid = valid; 815 if (valid) 816 dmacount |= BIT(VALID_BIT); 817 dmacount |= BIT(DMA_DONE_INTERRUPT_ENABLE); 818 819 /* td->dmadesc = previously set by caller */ 820 td->dmaaddr = cpu_to_le32 (req->req.dma); 821 822 /* 2280 may be polling VALID_BIT through ep->dma->dmadesc */ 823 wmb(); 824 td->dmacount = cpu_to_le32(dmacount); 825 } 826 827 static const u32 dmactl_default = 828 BIT(DMA_SCATTER_GATHER_DONE_INTERRUPT) | 829 BIT(DMA_CLEAR_COUNT_ENABLE) | 830 /* erratum 0116 workaround part 1 (use POLLING) */ 831 (POLL_100_USEC << DESCRIPTOR_POLLING_RATE) | 832 BIT(DMA_VALID_BIT_POLLING_ENABLE) | 833 BIT(DMA_VALID_BIT_ENABLE) | 834 BIT(DMA_SCATTER_GATHER_ENABLE) | 835 /* erratum 0116 workaround part 2 (no AUTOSTART) */ 836 BIT(DMA_ENABLE); 837 838 static inline void spin_stop_dma(struct net2280_dma_regs __iomem *dma) 839 { 840 handshake(&dma->dmactl, BIT(DMA_ENABLE), 0, 50); 841 } 842 843 static inline void stop_dma(struct net2280_dma_regs __iomem *dma) 844 { 845 writel(readl(&dma->dmactl) & ~BIT(DMA_ENABLE), &dma->dmactl); 846 spin_stop_dma(dma); 847 } 848 849 static void start_queue(struct net2280_ep *ep, u32 dmactl, u32 td_dma) 850 { 851 struct net2280_dma_regs __iomem *dma = ep->dma; 852 unsigned int tmp = BIT(VALID_BIT) | (ep->is_in << DMA_DIRECTION); 853 854 if (!(ep->dev->quirks & PLX_2280)) 855 tmp |= BIT(END_OF_CHAIN); 856 857 writel(tmp, &dma->dmacount); 858 writel(readl(&dma->dmastat), &dma->dmastat); 859 860 writel(td_dma, &dma->dmadesc); 861 if (ep->dev->quirks & PLX_PCIE) 862 dmactl |= BIT(DMA_REQUEST_OUTSTANDING); 863 writel(dmactl, &dma->dmactl); 864 865 /* erratum 0116 workaround part 3: pci arbiter away from net2280 */ 866 (void) readl(&ep->dev->pci->pcimstctl); 867 868 writel(BIT(DMA_START), &dma->dmastat); 869 } 870 871 static void start_dma(struct net2280_ep *ep, struct net2280_request *req) 872 { 873 u32 tmp; 874 struct net2280_dma_regs __iomem *dma = ep->dma; 875 876 /* FIXME can't use DMA for ZLPs */ 877 878 /* on this path we "know" there's no dma active (yet) */ 879 WARN_ON(readl(&dma->dmactl) & BIT(DMA_ENABLE)); 880 writel(0, &ep->dma->dmactl); 881 882 /* previous OUT packet might have been short */ 883 if (!ep->is_in && (readl(&ep->regs->ep_stat) & 884 BIT(NAK_OUT_PACKETS))) { 885 writel(BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT), 886 &ep->regs->ep_stat); 887 888 tmp = readl(&ep->regs->ep_avail); 889 if (tmp) { 890 writel(readl(&dma->dmastat), &dma->dmastat); 891 892 /* transfer all/some fifo data */ 893 writel(req->req.dma, &dma->dmaaddr); 894 tmp = min(tmp, req->req.length); 895 896 /* dma irq, faking scatterlist status */ 897 req->td->dmacount = cpu_to_le32(req->req.length - tmp); 898 writel(BIT(DMA_DONE_INTERRUPT_ENABLE) | tmp, 899 &dma->dmacount); 900 req->td->dmadesc = 0; 901 req->valid = 1; 902 903 writel(BIT(DMA_ENABLE), &dma->dmactl); 904 writel(BIT(DMA_START), &dma->dmastat); 905 return; 906 } 907 stop_out_naking(ep); 908 } 909 910 tmp = dmactl_default; 911 912 /* force packet boundaries between dma requests, but prevent the 913 * controller from automagically writing a last "short" packet 914 * (zero length) unless the driver explicitly said to do that. 915 */ 916 if (ep->is_in) { 917 if (likely((req->req.length % ep->ep.maxpacket) || 918 req->req.zero)){ 919 tmp |= BIT(DMA_FIFO_VALIDATE); 920 ep->in_fifo_validate = 1; 921 } else 922 ep->in_fifo_validate = 0; 923 } 924 925 /* init req->td, pointing to the current dummy */ 926 req->td->dmadesc = cpu_to_le32 (ep->td_dma); 927 fill_dma_desc(ep, req, 1); 928 929 req->td->dmacount |= cpu_to_le32(BIT(END_OF_CHAIN)); 930 931 start_queue(ep, tmp, req->td_dma); 932 } 933 934 static inline void 935 queue_dma(struct net2280_ep *ep, struct net2280_request *req, int valid) 936 { 937 struct net2280_dma *end; 938 dma_addr_t tmp; 939 940 /* swap new dummy for old, link; fill and maybe activate */ 941 end = ep->dummy; 942 ep->dummy = req->td; 943 req->td = end; 944 945 tmp = ep->td_dma; 946 ep->td_dma = req->td_dma; 947 req->td_dma = tmp; 948 949 end->dmadesc = cpu_to_le32 (ep->td_dma); 950 951 fill_dma_desc(ep, req, valid); 952 } 953 954 static void 955 done(struct net2280_ep *ep, struct net2280_request *req, int status) 956 { 957 struct net2280 *dev; 958 unsigned stopped = ep->stopped; 959 960 list_del_init(&req->queue); 961 962 if (req->req.status == -EINPROGRESS) 963 req->req.status = status; 964 else 965 status = req->req.status; 966 967 dev = ep->dev; 968 if (ep->dma) 969 usb_gadget_unmap_request(&dev->gadget, &req->req, ep->is_in); 970 971 if (status && status != -ESHUTDOWN) 972 ep_vdbg(dev, "complete %s req %p stat %d len %u/%u\n", 973 ep->ep.name, &req->req, status, 974 req->req.actual, req->req.length); 975 976 /* don't modify queue heads during completion callback */ 977 ep->stopped = 1; 978 spin_unlock(&dev->lock); 979 usb_gadget_giveback_request(&ep->ep, &req->req); 980 spin_lock(&dev->lock); 981 ep->stopped = stopped; 982 } 983 984 /*-------------------------------------------------------------------------*/ 985 986 static int 987 net2280_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) 988 { 989 struct net2280_request *req; 990 struct net2280_ep *ep; 991 struct net2280 *dev; 992 unsigned long flags; 993 int ret = 0; 994 995 /* we always require a cpu-view buffer, so that we can 996 * always use pio (as fallback or whatever). 997 */ 998 ep = container_of(_ep, struct net2280_ep, ep); 999 if (!_ep || (!ep->desc && ep->num != 0)) { 1000 pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep); 1001 return -EINVAL; 1002 } 1003 req = container_of(_req, struct net2280_request, req); 1004 if (!_req || !_req->complete || !_req->buf || 1005 !list_empty(&req->queue)) { 1006 ret = -EINVAL; 1007 goto print_err; 1008 } 1009 if (_req->length > (~0 & DMA_BYTE_COUNT_MASK)) { 1010 ret = -EDOM; 1011 goto print_err; 1012 } 1013 dev = ep->dev; 1014 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) { 1015 ret = -ESHUTDOWN; 1016 goto print_err; 1017 } 1018 1019 /* FIXME implement PIO fallback for ZLPs with DMA */ 1020 if (ep->dma && _req->length == 0) { 1021 ret = -EOPNOTSUPP; 1022 goto print_err; 1023 } 1024 1025 /* set up dma mapping in case the caller didn't */ 1026 if (ep->dma) { 1027 ret = usb_gadget_map_request(&dev->gadget, _req, 1028 ep->is_in); 1029 if (ret) 1030 goto print_err; 1031 } 1032 1033 ep_vdbg(dev, "%s queue req %p, len %d buf %p\n", 1034 _ep->name, _req, _req->length, _req->buf); 1035 1036 spin_lock_irqsave(&dev->lock, flags); 1037 1038 _req->status = -EINPROGRESS; 1039 _req->actual = 0; 1040 1041 /* kickstart this i/o queue? */ 1042 if (list_empty(&ep->queue) && !ep->stopped && 1043 !((dev->quirks & PLX_PCIE) && ep->dma && 1044 (readl(&ep->regs->ep_rsp) & BIT(CLEAR_ENDPOINT_HALT)))) { 1045 1046 /* use DMA if the endpoint supports it, else pio */ 1047 if (ep->dma) 1048 start_dma(ep, req); 1049 else { 1050 /* maybe there's no control data, just status ack */ 1051 if (ep->num == 0 && _req->length == 0) { 1052 allow_status(ep); 1053 done(ep, req, 0); 1054 ep_vdbg(dev, "%s status ack\n", ep->ep.name); 1055 goto done; 1056 } 1057 1058 /* PIO ... stuff the fifo, or unblock it. */ 1059 if (ep->is_in) 1060 write_fifo(ep, _req); 1061 else if (list_empty(&ep->queue)) { 1062 u32 s; 1063 1064 /* OUT FIFO might have packet(s) buffered */ 1065 s = readl(&ep->regs->ep_stat); 1066 if ((s & BIT(FIFO_EMPTY)) == 0) { 1067 /* note: _req->short_not_ok is 1068 * ignored here since PIO _always_ 1069 * stops queue advance here, and 1070 * _req->status doesn't change for 1071 * short reads (only _req->actual) 1072 */ 1073 if (read_fifo(ep, req) && 1074 ep->num == 0) { 1075 done(ep, req, 0); 1076 allow_status(ep); 1077 /* don't queue it */ 1078 req = NULL; 1079 } else if (read_fifo(ep, req) && 1080 ep->num != 0) { 1081 done(ep, req, 0); 1082 req = NULL; 1083 } else 1084 s = readl(&ep->regs->ep_stat); 1085 } 1086 1087 /* don't NAK, let the fifo fill */ 1088 if (req && (s & BIT(NAK_OUT_PACKETS))) 1089 writel(BIT(CLEAR_NAK_OUT_PACKETS), 1090 &ep->regs->ep_rsp); 1091 } 1092 } 1093 1094 } else if (ep->dma) { 1095 int valid = 1; 1096 1097 if (ep->is_in) { 1098 int expect; 1099 1100 /* preventing magic zlps is per-engine state, not 1101 * per-transfer; irq logic must recover hiccups. 1102 */ 1103 expect = likely(req->req.zero || 1104 (req->req.length % ep->ep.maxpacket)); 1105 if (expect != ep->in_fifo_validate) 1106 valid = 0; 1107 } 1108 queue_dma(ep, req, valid); 1109 1110 } /* else the irq handler advances the queue. */ 1111 1112 ep->responded = 1; 1113 if (req) 1114 list_add_tail(&req->queue, &ep->queue); 1115 done: 1116 spin_unlock_irqrestore(&dev->lock, flags); 1117 1118 /* pci writes may still be posted */ 1119 return ret; 1120 1121 print_err: 1122 dev_err(&ep->dev->pdev->dev, "%s: error=%d\n", __func__, ret); 1123 return ret; 1124 } 1125 1126 static inline void 1127 dma_done(struct net2280_ep *ep, struct net2280_request *req, u32 dmacount, 1128 int status) 1129 { 1130 req->req.actual = req->req.length - (DMA_BYTE_COUNT_MASK & dmacount); 1131 done(ep, req, status); 1132 } 1133 1134 static int scan_dma_completions(struct net2280_ep *ep) 1135 { 1136 int num_completed = 0; 1137 1138 /* only look at descriptors that were "naturally" retired, 1139 * so fifo and list head state won't matter 1140 */ 1141 while (!list_empty(&ep->queue)) { 1142 struct net2280_request *req; 1143 u32 req_dma_count; 1144 1145 req = list_entry(ep->queue.next, 1146 struct net2280_request, queue); 1147 if (!req->valid) 1148 break; 1149 rmb(); 1150 req_dma_count = le32_to_cpup(&req->td->dmacount); 1151 if ((req_dma_count & BIT(VALID_BIT)) != 0) 1152 break; 1153 1154 /* SHORT_PACKET_TRANSFERRED_INTERRUPT handles "usb-short" 1155 * cases where DMA must be aborted; this code handles 1156 * all non-abort DMA completions. 1157 */ 1158 if (unlikely(req->td->dmadesc == 0)) { 1159 /* paranoia */ 1160 u32 const ep_dmacount = readl(&ep->dma->dmacount); 1161 1162 if (ep_dmacount & DMA_BYTE_COUNT_MASK) 1163 break; 1164 /* single transfer mode */ 1165 dma_done(ep, req, req_dma_count, 0); 1166 num_completed++; 1167 break; 1168 } else if (!ep->is_in && 1169 (req->req.length % ep->ep.maxpacket) && 1170 !(ep->dev->quirks & PLX_PCIE)) { 1171 1172 u32 const ep_stat = readl(&ep->regs->ep_stat); 1173 /* AVOID TROUBLE HERE by not issuing short reads from 1174 * your gadget driver. That helps avoids errata 0121, 1175 * 0122, and 0124; not all cases trigger the warning. 1176 */ 1177 if ((ep_stat & BIT(NAK_OUT_PACKETS)) == 0) { 1178 ep_warn(ep->dev, "%s lost packet sync!\n", 1179 ep->ep.name); 1180 req->req.status = -EOVERFLOW; 1181 } else { 1182 u32 const ep_avail = readl(&ep->regs->ep_avail); 1183 if (ep_avail) { 1184 /* fifo gets flushed later */ 1185 ep->out_overflow = 1; 1186 ep_dbg(ep->dev, 1187 "%s dma, discard %d len %d\n", 1188 ep->ep.name, ep_avail, 1189 req->req.length); 1190 req->req.status = -EOVERFLOW; 1191 } 1192 } 1193 } 1194 dma_done(ep, req, req_dma_count, 0); 1195 num_completed++; 1196 } 1197 1198 return num_completed; 1199 } 1200 1201 static void restart_dma(struct net2280_ep *ep) 1202 { 1203 struct net2280_request *req; 1204 1205 if (ep->stopped) 1206 return; 1207 req = list_entry(ep->queue.next, struct net2280_request, queue); 1208 1209 start_dma(ep, req); 1210 } 1211 1212 static void abort_dma(struct net2280_ep *ep) 1213 { 1214 /* abort the current transfer */ 1215 if (likely(!list_empty(&ep->queue))) { 1216 /* FIXME work around errata 0121, 0122, 0124 */ 1217 writel(BIT(DMA_ABORT), &ep->dma->dmastat); 1218 spin_stop_dma(ep->dma); 1219 } else 1220 stop_dma(ep->dma); 1221 scan_dma_completions(ep); 1222 } 1223 1224 /* dequeue ALL requests */ 1225 static void nuke(struct net2280_ep *ep) 1226 { 1227 struct net2280_request *req; 1228 1229 /* called with spinlock held */ 1230 ep->stopped = 1; 1231 if (ep->dma) 1232 abort_dma(ep); 1233 while (!list_empty(&ep->queue)) { 1234 req = list_entry(ep->queue.next, 1235 struct net2280_request, 1236 queue); 1237 done(ep, req, -ESHUTDOWN); 1238 } 1239 } 1240 1241 /* dequeue JUST ONE request */ 1242 static int net2280_dequeue(struct usb_ep *_ep, struct usb_request *_req) 1243 { 1244 struct net2280_ep *ep; 1245 struct net2280_request *req; 1246 unsigned long flags; 1247 u32 dmactl; 1248 int stopped; 1249 1250 ep = container_of(_ep, struct net2280_ep, ep); 1251 if (!_ep || (!ep->desc && ep->num != 0) || !_req) { 1252 pr_err("%s: Invalid ep=%p or ep->desc or req=%p\n", 1253 __func__, _ep, _req); 1254 return -EINVAL; 1255 } 1256 1257 spin_lock_irqsave(&ep->dev->lock, flags); 1258 stopped = ep->stopped; 1259 1260 /* quiesce dma while we patch the queue */ 1261 dmactl = 0; 1262 ep->stopped = 1; 1263 if (ep->dma) { 1264 dmactl = readl(&ep->dma->dmactl); 1265 /* WARNING erratum 0127 may kick in ... */ 1266 stop_dma(ep->dma); 1267 scan_dma_completions(ep); 1268 } 1269 1270 /* make sure it's still queued on this endpoint */ 1271 list_for_each_entry(req, &ep->queue, queue) { 1272 if (&req->req == _req) 1273 break; 1274 } 1275 if (&req->req != _req) { 1276 ep->stopped = stopped; 1277 spin_unlock_irqrestore(&ep->dev->lock, flags); 1278 ep_dbg(ep->dev, "%s: Request mismatch\n", __func__); 1279 return -EINVAL; 1280 } 1281 1282 /* queue head may be partially complete. */ 1283 if (ep->queue.next == &req->queue) { 1284 if (ep->dma) { 1285 ep_dbg(ep->dev, "unlink (%s) dma\n", _ep->name); 1286 _req->status = -ECONNRESET; 1287 abort_dma(ep); 1288 if (likely(ep->queue.next == &req->queue)) { 1289 /* NOTE: misreports single-transfer mode*/ 1290 req->td->dmacount = 0; /* invalidate */ 1291 dma_done(ep, req, 1292 readl(&ep->dma->dmacount), 1293 -ECONNRESET); 1294 } 1295 } else { 1296 ep_dbg(ep->dev, "unlink (%s) pio\n", _ep->name); 1297 done(ep, req, -ECONNRESET); 1298 } 1299 req = NULL; 1300 } 1301 1302 if (req) 1303 done(ep, req, -ECONNRESET); 1304 ep->stopped = stopped; 1305 1306 if (ep->dma) { 1307 /* turn off dma on inactive queues */ 1308 if (list_empty(&ep->queue)) 1309 stop_dma(ep->dma); 1310 else if (!ep->stopped) { 1311 /* resume current request, or start new one */ 1312 if (req) 1313 writel(dmactl, &ep->dma->dmactl); 1314 else 1315 start_dma(ep, list_entry(ep->queue.next, 1316 struct net2280_request, queue)); 1317 } 1318 } 1319 1320 spin_unlock_irqrestore(&ep->dev->lock, flags); 1321 return 0; 1322 } 1323 1324 /*-------------------------------------------------------------------------*/ 1325 1326 static int net2280_fifo_status(struct usb_ep *_ep); 1327 1328 static int 1329 net2280_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged) 1330 { 1331 struct net2280_ep *ep; 1332 unsigned long flags; 1333 int retval = 0; 1334 1335 ep = container_of(_ep, struct net2280_ep, ep); 1336 if (!_ep || (!ep->desc && ep->num != 0)) { 1337 pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep); 1338 return -EINVAL; 1339 } 1340 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) { 1341 retval = -ESHUTDOWN; 1342 goto print_err; 1343 } 1344 if (ep->desc /* not ep0 */ && (ep->desc->bmAttributes & 0x03) 1345 == USB_ENDPOINT_XFER_ISOC) { 1346 retval = -EINVAL; 1347 goto print_err; 1348 } 1349 1350 spin_lock_irqsave(&ep->dev->lock, flags); 1351 if (!list_empty(&ep->queue)) { 1352 retval = -EAGAIN; 1353 goto print_unlock; 1354 } else if (ep->is_in && value && net2280_fifo_status(_ep) != 0) { 1355 retval = -EAGAIN; 1356 goto print_unlock; 1357 } else { 1358 ep_vdbg(ep->dev, "%s %s %s\n", _ep->name, 1359 value ? "set" : "clear", 1360 wedged ? "wedge" : "halt"); 1361 /* set/clear, then synch memory views with the device */ 1362 if (value) { 1363 if (ep->num == 0) 1364 ep->dev->protocol_stall = 1; 1365 else 1366 set_halt(ep); 1367 if (wedged) 1368 ep->wedged = 1; 1369 } else { 1370 clear_halt(ep); 1371 if (ep->dev->quirks & PLX_PCIE && 1372 !list_empty(&ep->queue) && ep->td_dma) 1373 restart_dma(ep); 1374 ep->wedged = 0; 1375 } 1376 (void) readl(&ep->regs->ep_rsp); 1377 } 1378 spin_unlock_irqrestore(&ep->dev->lock, flags); 1379 1380 return retval; 1381 1382 print_unlock: 1383 spin_unlock_irqrestore(&ep->dev->lock, flags); 1384 print_err: 1385 dev_err(&ep->dev->pdev->dev, "%s: error=%d\n", __func__, retval); 1386 return retval; 1387 } 1388 1389 static int net2280_set_halt(struct usb_ep *_ep, int value) 1390 { 1391 return net2280_set_halt_and_wedge(_ep, value, 0); 1392 } 1393 1394 static int net2280_set_wedge(struct usb_ep *_ep) 1395 { 1396 if (!_ep || _ep->name == ep0name) { 1397 pr_err("%s: Invalid ep=%p or ep0\n", __func__, _ep); 1398 return -EINVAL; 1399 } 1400 return net2280_set_halt_and_wedge(_ep, 1, 1); 1401 } 1402 1403 static int net2280_fifo_status(struct usb_ep *_ep) 1404 { 1405 struct net2280_ep *ep; 1406 u32 avail; 1407 1408 ep = container_of(_ep, struct net2280_ep, ep); 1409 if (!_ep || (!ep->desc && ep->num != 0)) { 1410 pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep); 1411 return -ENODEV; 1412 } 1413 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) { 1414 dev_err(&ep->dev->pdev->dev, 1415 "%s: Invalid driver=%p or speed=%d\n", 1416 __func__, ep->dev->driver, ep->dev->gadget.speed); 1417 return -ESHUTDOWN; 1418 } 1419 1420 avail = readl(&ep->regs->ep_avail) & (BIT(12) - 1); 1421 if (avail > ep->fifo_size) { 1422 dev_err(&ep->dev->pdev->dev, "%s: Fifo overflow\n", __func__); 1423 return -EOVERFLOW; 1424 } 1425 if (ep->is_in) 1426 avail = ep->fifo_size - avail; 1427 return avail; 1428 } 1429 1430 static void net2280_fifo_flush(struct usb_ep *_ep) 1431 { 1432 struct net2280_ep *ep; 1433 1434 ep = container_of(_ep, struct net2280_ep, ep); 1435 if (!_ep || (!ep->desc && ep->num != 0)) { 1436 pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep); 1437 return; 1438 } 1439 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) { 1440 dev_err(&ep->dev->pdev->dev, 1441 "%s: Invalid driver=%p or speed=%d\n", 1442 __func__, ep->dev->driver, ep->dev->gadget.speed); 1443 return; 1444 } 1445 1446 writel(BIT(FIFO_FLUSH), &ep->regs->ep_stat); 1447 (void) readl(&ep->regs->ep_rsp); 1448 } 1449 1450 static const struct usb_ep_ops net2280_ep_ops = { 1451 .enable = net2280_enable, 1452 .disable = net2280_disable, 1453 1454 .alloc_request = net2280_alloc_request, 1455 .free_request = net2280_free_request, 1456 1457 .queue = net2280_queue, 1458 .dequeue = net2280_dequeue, 1459 1460 .set_halt = net2280_set_halt, 1461 .set_wedge = net2280_set_wedge, 1462 .fifo_status = net2280_fifo_status, 1463 .fifo_flush = net2280_fifo_flush, 1464 }; 1465 1466 /*-------------------------------------------------------------------------*/ 1467 1468 static int net2280_get_frame(struct usb_gadget *_gadget) 1469 { 1470 struct net2280 *dev; 1471 unsigned long flags; 1472 u16 retval; 1473 1474 if (!_gadget) 1475 return -ENODEV; 1476 dev = container_of(_gadget, struct net2280, gadget); 1477 spin_lock_irqsave(&dev->lock, flags); 1478 retval = get_idx_reg(dev->regs, REG_FRAME) & 0x03ff; 1479 spin_unlock_irqrestore(&dev->lock, flags); 1480 return retval; 1481 } 1482 1483 static int net2280_wakeup(struct usb_gadget *_gadget) 1484 { 1485 struct net2280 *dev; 1486 u32 tmp; 1487 unsigned long flags; 1488 1489 if (!_gadget) 1490 return 0; 1491 dev = container_of(_gadget, struct net2280, gadget); 1492 1493 spin_lock_irqsave(&dev->lock, flags); 1494 tmp = readl(&dev->usb->usbctl); 1495 if (tmp & BIT(DEVICE_REMOTE_WAKEUP_ENABLE)) 1496 writel(BIT(GENERATE_RESUME), &dev->usb->usbstat); 1497 spin_unlock_irqrestore(&dev->lock, flags); 1498 1499 /* pci writes may still be posted */ 1500 return 0; 1501 } 1502 1503 static int net2280_set_selfpowered(struct usb_gadget *_gadget, int value) 1504 { 1505 struct net2280 *dev; 1506 u32 tmp; 1507 unsigned long flags; 1508 1509 if (!_gadget) 1510 return 0; 1511 dev = container_of(_gadget, struct net2280, gadget); 1512 1513 spin_lock_irqsave(&dev->lock, flags); 1514 tmp = readl(&dev->usb->usbctl); 1515 if (value) { 1516 tmp |= BIT(SELF_POWERED_STATUS); 1517 _gadget->is_selfpowered = 1; 1518 } else { 1519 tmp &= ~BIT(SELF_POWERED_STATUS); 1520 _gadget->is_selfpowered = 0; 1521 } 1522 writel(tmp, &dev->usb->usbctl); 1523 spin_unlock_irqrestore(&dev->lock, flags); 1524 1525 return 0; 1526 } 1527 1528 static int net2280_pullup(struct usb_gadget *_gadget, int is_on) 1529 { 1530 struct net2280 *dev; 1531 u32 tmp; 1532 unsigned long flags; 1533 1534 if (!_gadget) 1535 return -ENODEV; 1536 dev = container_of(_gadget, struct net2280, gadget); 1537 1538 spin_lock_irqsave(&dev->lock, flags); 1539 tmp = readl(&dev->usb->usbctl); 1540 dev->softconnect = (is_on != 0); 1541 if (is_on) { 1542 ep0_start(dev); 1543 writel(tmp | BIT(USB_DETECT_ENABLE), &dev->usb->usbctl); 1544 } else { 1545 writel(tmp & ~BIT(USB_DETECT_ENABLE), &dev->usb->usbctl); 1546 stop_activity(dev, NULL); 1547 } 1548 1549 spin_unlock_irqrestore(&dev->lock, flags); 1550 1551 return 0; 1552 } 1553 1554 static struct usb_ep *net2280_match_ep(struct usb_gadget *_gadget, 1555 struct usb_endpoint_descriptor *desc, 1556 struct usb_ss_ep_comp_descriptor *ep_comp) 1557 { 1558 char name[8]; 1559 struct usb_ep *ep; 1560 1561 if (usb_endpoint_type(desc) == USB_ENDPOINT_XFER_INT) { 1562 /* ep-e, ep-f are PIO with only 64 byte fifos */ 1563 ep = gadget_find_ep_by_name(_gadget, "ep-e"); 1564 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp)) 1565 return ep; 1566 ep = gadget_find_ep_by_name(_gadget, "ep-f"); 1567 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp)) 1568 return ep; 1569 } 1570 1571 /* USB3380: Only first four endpoints have DMA channels. Allocate 1572 * slower interrupt endpoints from PIO hw endpoints, to allow bulk/isoc 1573 * endpoints use DMA hw endpoints. 1574 */ 1575 if (usb_endpoint_type(desc) == USB_ENDPOINT_XFER_INT && 1576 usb_endpoint_dir_in(desc)) { 1577 ep = gadget_find_ep_by_name(_gadget, "ep2in"); 1578 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp)) 1579 return ep; 1580 ep = gadget_find_ep_by_name(_gadget, "ep4in"); 1581 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp)) 1582 return ep; 1583 } else if (usb_endpoint_type(desc) == USB_ENDPOINT_XFER_INT && 1584 !usb_endpoint_dir_in(desc)) { 1585 ep = gadget_find_ep_by_name(_gadget, "ep1out"); 1586 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp)) 1587 return ep; 1588 ep = gadget_find_ep_by_name(_gadget, "ep3out"); 1589 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp)) 1590 return ep; 1591 } else if (usb_endpoint_type(desc) != USB_ENDPOINT_XFER_BULK && 1592 usb_endpoint_dir_in(desc)) { 1593 ep = gadget_find_ep_by_name(_gadget, "ep1in"); 1594 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp)) 1595 return ep; 1596 ep = gadget_find_ep_by_name(_gadget, "ep3in"); 1597 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp)) 1598 return ep; 1599 } else if (usb_endpoint_type(desc) != USB_ENDPOINT_XFER_BULK && 1600 !usb_endpoint_dir_in(desc)) { 1601 ep = gadget_find_ep_by_name(_gadget, "ep2out"); 1602 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp)) 1603 return ep; 1604 ep = gadget_find_ep_by_name(_gadget, "ep4out"); 1605 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp)) 1606 return ep; 1607 } 1608 1609 /* USB3380: use same address for usb and hardware endpoints */ 1610 snprintf(name, sizeof(name), "ep%d%s", usb_endpoint_num(desc), 1611 usb_endpoint_dir_in(desc) ? "in" : "out"); 1612 ep = gadget_find_ep_by_name(_gadget, name); 1613 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp)) 1614 return ep; 1615 1616 return NULL; 1617 } 1618 1619 static int net2280_start(struct usb_gadget *_gadget, 1620 struct usb_gadget_driver *driver); 1621 static int net2280_stop(struct usb_gadget *_gadget); 1622 1623 static const struct usb_gadget_ops net2280_ops = { 1624 .get_frame = net2280_get_frame, 1625 .wakeup = net2280_wakeup, 1626 .set_selfpowered = net2280_set_selfpowered, 1627 .pullup = net2280_pullup, 1628 .udc_start = net2280_start, 1629 .udc_stop = net2280_stop, 1630 .match_ep = net2280_match_ep, 1631 }; 1632 1633 /*-------------------------------------------------------------------------*/ 1634 1635 #ifdef CONFIG_USB_GADGET_DEBUG_FILES 1636 1637 /* FIXME move these into procfs, and use seq_file. 1638 * Sysfs _still_ doesn't behave for arbitrarily sized files, 1639 * and also doesn't help products using this with 2.4 kernels. 1640 */ 1641 1642 /* "function" sysfs attribute */ 1643 static ssize_t function_show(struct device *_dev, struct device_attribute *attr, 1644 char *buf) 1645 { 1646 struct net2280 *dev = dev_get_drvdata(_dev); 1647 1648 if (!dev->driver || !dev->driver->function || 1649 strlen(dev->driver->function) > PAGE_SIZE) 1650 return 0; 1651 return scnprintf(buf, PAGE_SIZE, "%s\n", dev->driver->function); 1652 } 1653 static DEVICE_ATTR_RO(function); 1654 1655 static ssize_t registers_show(struct device *_dev, 1656 struct device_attribute *attr, char *buf) 1657 { 1658 struct net2280 *dev; 1659 char *next; 1660 unsigned size, t; 1661 unsigned long flags; 1662 int i; 1663 u32 t1, t2; 1664 const char *s; 1665 1666 dev = dev_get_drvdata(_dev); 1667 next = buf; 1668 size = PAGE_SIZE; 1669 spin_lock_irqsave(&dev->lock, flags); 1670 1671 if (dev->driver) 1672 s = dev->driver->driver.name; 1673 else 1674 s = "(none)"; 1675 1676 /* Main Control Registers */ 1677 t = scnprintf(next, size, "%s version " DRIVER_VERSION 1678 ", chiprev %04x\n\n" 1679 "devinit %03x fifoctl %08x gadget '%s'\n" 1680 "pci irqenb0 %02x irqenb1 %08x " 1681 "irqstat0 %04x irqstat1 %08x\n", 1682 driver_name, dev->chiprev, 1683 readl(&dev->regs->devinit), 1684 readl(&dev->regs->fifoctl), 1685 s, 1686 readl(&dev->regs->pciirqenb0), 1687 readl(&dev->regs->pciirqenb1), 1688 readl(&dev->regs->irqstat0), 1689 readl(&dev->regs->irqstat1)); 1690 size -= t; 1691 next += t; 1692 1693 /* USB Control Registers */ 1694 t1 = readl(&dev->usb->usbctl); 1695 t2 = readl(&dev->usb->usbstat); 1696 if (t1 & BIT(VBUS_PIN)) { 1697 if (t2 & BIT(HIGH_SPEED)) 1698 s = "high speed"; 1699 else if (dev->gadget.speed == USB_SPEED_UNKNOWN) 1700 s = "powered"; 1701 else 1702 s = "full speed"; 1703 /* full speed bit (6) not working?? */ 1704 } else 1705 s = "not attached"; 1706 t = scnprintf(next, size, 1707 "stdrsp %08x usbctl %08x usbstat %08x " 1708 "addr 0x%02x (%s)\n", 1709 readl(&dev->usb->stdrsp), t1, t2, 1710 readl(&dev->usb->ouraddr), s); 1711 size -= t; 1712 next += t; 1713 1714 /* PCI Master Control Registers */ 1715 1716 /* DMA Control Registers */ 1717 1718 /* Configurable EP Control Registers */ 1719 for (i = 0; i < dev->n_ep; i++) { 1720 struct net2280_ep *ep; 1721 1722 ep = &dev->ep[i]; 1723 if (i && !ep->desc) 1724 continue; 1725 1726 t1 = readl(&ep->cfg->ep_cfg); 1727 t2 = readl(&ep->regs->ep_rsp) & 0xff; 1728 t = scnprintf(next, size, 1729 "\n%s\tcfg %05x rsp (%02x) %s%s%s%s%s%s%s%s" 1730 "irqenb %02x\n", 1731 ep->ep.name, t1, t2, 1732 (t2 & BIT(CLEAR_NAK_OUT_PACKETS)) 1733 ? "NAK " : "", 1734 (t2 & BIT(CLEAR_EP_HIDE_STATUS_PHASE)) 1735 ? "hide " : "", 1736 (t2 & BIT(CLEAR_EP_FORCE_CRC_ERROR)) 1737 ? "CRC " : "", 1738 (t2 & BIT(CLEAR_INTERRUPT_MODE)) 1739 ? "interrupt " : "", 1740 (t2 & BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE)) 1741 ? "status " : "", 1742 (t2 & BIT(CLEAR_NAK_OUT_PACKETS_MODE)) 1743 ? "NAKmode " : "", 1744 (t2 & BIT(CLEAR_ENDPOINT_TOGGLE)) 1745 ? "DATA1 " : "DATA0 ", 1746 (t2 & BIT(CLEAR_ENDPOINT_HALT)) 1747 ? "HALT " : "", 1748 readl(&ep->regs->ep_irqenb)); 1749 size -= t; 1750 next += t; 1751 1752 t = scnprintf(next, size, 1753 "\tstat %08x avail %04x " 1754 "(ep%d%s-%s)%s\n", 1755 readl(&ep->regs->ep_stat), 1756 readl(&ep->regs->ep_avail), 1757 t1 & 0x0f, DIR_STRING(t1), 1758 type_string(t1 >> 8), 1759 ep->stopped ? "*" : ""); 1760 size -= t; 1761 next += t; 1762 1763 if (!ep->dma) 1764 continue; 1765 1766 t = scnprintf(next, size, 1767 " dma\tctl %08x stat %08x count %08x\n" 1768 "\taddr %08x desc %08x\n", 1769 readl(&ep->dma->dmactl), 1770 readl(&ep->dma->dmastat), 1771 readl(&ep->dma->dmacount), 1772 readl(&ep->dma->dmaaddr), 1773 readl(&ep->dma->dmadesc)); 1774 size -= t; 1775 next += t; 1776 1777 } 1778 1779 /* Indexed Registers (none yet) */ 1780 1781 /* Statistics */ 1782 t = scnprintf(next, size, "\nirqs: "); 1783 size -= t; 1784 next += t; 1785 for (i = 0; i < dev->n_ep; i++) { 1786 struct net2280_ep *ep; 1787 1788 ep = &dev->ep[i]; 1789 if (i && !ep->irqs) 1790 continue; 1791 t = scnprintf(next, size, " %s/%lu", ep->ep.name, ep->irqs); 1792 size -= t; 1793 next += t; 1794 1795 } 1796 t = scnprintf(next, size, "\n"); 1797 size -= t; 1798 next += t; 1799 1800 spin_unlock_irqrestore(&dev->lock, flags); 1801 1802 return PAGE_SIZE - size; 1803 } 1804 static DEVICE_ATTR_RO(registers); 1805 1806 static ssize_t queues_show(struct device *_dev, struct device_attribute *attr, 1807 char *buf) 1808 { 1809 struct net2280 *dev; 1810 char *next; 1811 unsigned size; 1812 unsigned long flags; 1813 int i; 1814 1815 dev = dev_get_drvdata(_dev); 1816 next = buf; 1817 size = PAGE_SIZE; 1818 spin_lock_irqsave(&dev->lock, flags); 1819 1820 for (i = 0; i < dev->n_ep; i++) { 1821 struct net2280_ep *ep = &dev->ep[i]; 1822 struct net2280_request *req; 1823 int t; 1824 1825 if (i != 0) { 1826 const struct usb_endpoint_descriptor *d; 1827 1828 d = ep->desc; 1829 if (!d) 1830 continue; 1831 t = d->bEndpointAddress; 1832 t = scnprintf(next, size, 1833 "\n%s (ep%d%s-%s) max %04x %s fifo %d\n", 1834 ep->ep.name, t & USB_ENDPOINT_NUMBER_MASK, 1835 (t & USB_DIR_IN) ? "in" : "out", 1836 type_string(d->bmAttributes), 1837 usb_endpoint_maxp(d), 1838 ep->dma ? "dma" : "pio", ep->fifo_size 1839 ); 1840 } else /* ep0 should only have one transfer queued */ 1841 t = scnprintf(next, size, "ep0 max 64 pio %s\n", 1842 ep->is_in ? "in" : "out"); 1843 if (t <= 0 || t > size) 1844 goto done; 1845 size -= t; 1846 next += t; 1847 1848 if (list_empty(&ep->queue)) { 1849 t = scnprintf(next, size, "\t(nothing queued)\n"); 1850 if (t <= 0 || t > size) 1851 goto done; 1852 size -= t; 1853 next += t; 1854 continue; 1855 } 1856 list_for_each_entry(req, &ep->queue, queue) { 1857 if (ep->dma && req->td_dma == readl(&ep->dma->dmadesc)) 1858 t = scnprintf(next, size, 1859 "\treq %p len %d/%d " 1860 "buf %p (dmacount %08x)\n", 1861 &req->req, req->req.actual, 1862 req->req.length, req->req.buf, 1863 readl(&ep->dma->dmacount)); 1864 else 1865 t = scnprintf(next, size, 1866 "\treq %p len %d/%d buf %p\n", 1867 &req->req, req->req.actual, 1868 req->req.length, req->req.buf); 1869 if (t <= 0 || t > size) 1870 goto done; 1871 size -= t; 1872 next += t; 1873 1874 if (ep->dma) { 1875 struct net2280_dma *td; 1876 1877 td = req->td; 1878 t = scnprintf(next, size, "\t td %08x " 1879 " count %08x buf %08x desc %08x\n", 1880 (u32) req->td_dma, 1881 le32_to_cpu(td->dmacount), 1882 le32_to_cpu(td->dmaaddr), 1883 le32_to_cpu(td->dmadesc)); 1884 if (t <= 0 || t > size) 1885 goto done; 1886 size -= t; 1887 next += t; 1888 } 1889 } 1890 } 1891 1892 done: 1893 spin_unlock_irqrestore(&dev->lock, flags); 1894 return PAGE_SIZE - size; 1895 } 1896 static DEVICE_ATTR_RO(queues); 1897 1898 1899 #else 1900 1901 #define device_create_file(a, b) (0) 1902 #define device_remove_file(a, b) do { } while (0) 1903 1904 #endif 1905 1906 /*-------------------------------------------------------------------------*/ 1907 1908 /* another driver-specific mode might be a request type doing dma 1909 * to/from another device fifo instead of to/from memory. 1910 */ 1911 1912 static void set_fifo_mode(struct net2280 *dev, int mode) 1913 { 1914 /* keeping high bits preserves BAR2 */ 1915 writel((0xffff << PCI_BASE2_RANGE) | mode, &dev->regs->fifoctl); 1916 1917 /* always ep-{a,b,e,f} ... maybe not ep-c or ep-d */ 1918 INIT_LIST_HEAD(&dev->gadget.ep_list); 1919 list_add_tail(&dev->ep[1].ep.ep_list, &dev->gadget.ep_list); 1920 list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list); 1921 switch (mode) { 1922 case 0: 1923 list_add_tail(&dev->ep[3].ep.ep_list, &dev->gadget.ep_list); 1924 list_add_tail(&dev->ep[4].ep.ep_list, &dev->gadget.ep_list); 1925 dev->ep[1].fifo_size = dev->ep[2].fifo_size = 1024; 1926 break; 1927 case 1: 1928 dev->ep[1].fifo_size = dev->ep[2].fifo_size = 2048; 1929 break; 1930 case 2: 1931 list_add_tail(&dev->ep[3].ep.ep_list, &dev->gadget.ep_list); 1932 dev->ep[1].fifo_size = 2048; 1933 dev->ep[2].fifo_size = 1024; 1934 break; 1935 } 1936 /* fifo sizes for ep0, ep-c, ep-d, ep-e, and ep-f never change */ 1937 list_add_tail(&dev->ep[5].ep.ep_list, &dev->gadget.ep_list); 1938 list_add_tail(&dev->ep[6].ep.ep_list, &dev->gadget.ep_list); 1939 } 1940 1941 static void defect7374_disable_data_eps(struct net2280 *dev) 1942 { 1943 /* 1944 * For Defect 7374, disable data EPs (and more): 1945 * - This phase undoes the earlier phase of the Defect 7374 workaround, 1946 * returing ep regs back to normal. 1947 */ 1948 struct net2280_ep *ep; 1949 int i; 1950 unsigned char ep_sel; 1951 u32 tmp_reg; 1952 1953 for (i = 1; i < 5; i++) { 1954 ep = &dev->ep[i]; 1955 writel(i, &ep->cfg->ep_cfg); 1956 } 1957 1958 /* CSROUT, CSRIN, PCIOUT, PCIIN, STATIN, RCIN */ 1959 for (i = 0; i < 6; i++) 1960 writel(0, &dev->dep[i].dep_cfg); 1961 1962 for (ep_sel = 0; ep_sel <= 21; ep_sel++) { 1963 /* Select an endpoint for subsequent operations: */ 1964 tmp_reg = readl(&dev->plregs->pl_ep_ctrl); 1965 writel(((tmp_reg & ~0x1f) | ep_sel), &dev->plregs->pl_ep_ctrl); 1966 1967 if (ep_sel < 2 || (ep_sel > 9 && ep_sel < 14) || 1968 ep_sel == 18 || ep_sel == 20) 1969 continue; 1970 1971 /* Change settings on some selected endpoints */ 1972 tmp_reg = readl(&dev->plregs->pl_ep_cfg_4); 1973 tmp_reg &= ~BIT(NON_CTRL_IN_TOLERATE_BAD_DIR); 1974 writel(tmp_reg, &dev->plregs->pl_ep_cfg_4); 1975 tmp_reg = readl(&dev->plregs->pl_ep_ctrl); 1976 tmp_reg |= BIT(EP_INITIALIZED); 1977 writel(tmp_reg, &dev->plregs->pl_ep_ctrl); 1978 } 1979 } 1980 1981 static void defect7374_enable_data_eps_zero(struct net2280 *dev) 1982 { 1983 u32 tmp = 0, tmp_reg; 1984 u32 scratch; 1985 int i; 1986 unsigned char ep_sel; 1987 1988 scratch = get_idx_reg(dev->regs, SCRATCH); 1989 1990 WARN_ON((scratch & (0xf << DEFECT7374_FSM_FIELD)) 1991 == DEFECT7374_FSM_SS_CONTROL_READ); 1992 1993 scratch &= ~(0xf << DEFECT7374_FSM_FIELD); 1994 1995 ep_warn(dev, "Operate Defect 7374 workaround soft this time"); 1996 ep_warn(dev, "It will operate on cold-reboot and SS connect"); 1997 1998 /*GPEPs:*/ 1999 tmp = ((0 << ENDPOINT_NUMBER) | BIT(ENDPOINT_DIRECTION) | 2000 (2 << OUT_ENDPOINT_TYPE) | (2 << IN_ENDPOINT_TYPE) | 2001 ((dev->enhanced_mode) ? 2002 BIT(OUT_ENDPOINT_ENABLE) | BIT(IN_ENDPOINT_ENABLE) : 2003 BIT(ENDPOINT_ENABLE))); 2004 2005 for (i = 1; i < 5; i++) 2006 writel(tmp, &dev->ep[i].cfg->ep_cfg); 2007 2008 /* CSRIN, PCIIN, STATIN, RCIN*/ 2009 tmp = ((0 << ENDPOINT_NUMBER) | BIT(ENDPOINT_ENABLE)); 2010 writel(tmp, &dev->dep[1].dep_cfg); 2011 writel(tmp, &dev->dep[3].dep_cfg); 2012 writel(tmp, &dev->dep[4].dep_cfg); 2013 writel(tmp, &dev->dep[5].dep_cfg); 2014 2015 /*Implemented for development and debug. 2016 * Can be refined/tuned later.*/ 2017 for (ep_sel = 0; ep_sel <= 21; ep_sel++) { 2018 /* Select an endpoint for subsequent operations: */ 2019 tmp_reg = readl(&dev->plregs->pl_ep_ctrl); 2020 writel(((tmp_reg & ~0x1f) | ep_sel), 2021 &dev->plregs->pl_ep_ctrl); 2022 2023 if (ep_sel == 1) { 2024 tmp = 2025 (readl(&dev->plregs->pl_ep_ctrl) | 2026 BIT(CLEAR_ACK_ERROR_CODE) | 0); 2027 writel(tmp, &dev->plregs->pl_ep_ctrl); 2028 continue; 2029 } 2030 2031 if (ep_sel == 0 || (ep_sel > 9 && ep_sel < 14) || 2032 ep_sel == 18 || ep_sel == 20) 2033 continue; 2034 2035 tmp = (readl(&dev->plregs->pl_ep_cfg_4) | 2036 BIT(NON_CTRL_IN_TOLERATE_BAD_DIR) | 0); 2037 writel(tmp, &dev->plregs->pl_ep_cfg_4); 2038 2039 tmp = readl(&dev->plregs->pl_ep_ctrl) & 2040 ~BIT(EP_INITIALIZED); 2041 writel(tmp, &dev->plregs->pl_ep_ctrl); 2042 2043 } 2044 2045 /* Set FSM to focus on the first Control Read: 2046 * - Tip: Connection speed is known upon the first 2047 * setup request.*/ 2048 scratch |= DEFECT7374_FSM_WAITING_FOR_CONTROL_READ; 2049 set_idx_reg(dev->regs, SCRATCH, scratch); 2050 2051 } 2052 2053 /* keeping it simple: 2054 * - one bus driver, initted first; 2055 * - one function driver, initted second 2056 * 2057 * most of the work to support multiple net2280 controllers would 2058 * be to associate this gadget driver (yes?) with all of them, or 2059 * perhaps to bind specific drivers to specific devices. 2060 */ 2061 2062 static void usb_reset_228x(struct net2280 *dev) 2063 { 2064 u32 tmp; 2065 2066 dev->gadget.speed = USB_SPEED_UNKNOWN; 2067 (void) readl(&dev->usb->usbctl); 2068 2069 net2280_led_init(dev); 2070 2071 /* disable automatic responses, and irqs */ 2072 writel(0, &dev->usb->stdrsp); 2073 writel(0, &dev->regs->pciirqenb0); 2074 writel(0, &dev->regs->pciirqenb1); 2075 2076 /* clear old dma and irq state */ 2077 for (tmp = 0; tmp < 4; tmp++) { 2078 struct net2280_ep *ep = &dev->ep[tmp + 1]; 2079 if (ep->dma) 2080 abort_dma(ep); 2081 } 2082 2083 writel(~0, &dev->regs->irqstat0), 2084 writel(~(u32)BIT(SUSPEND_REQUEST_INTERRUPT), &dev->regs->irqstat1), 2085 2086 /* reset, and enable pci */ 2087 tmp = readl(&dev->regs->devinit) | 2088 BIT(PCI_ENABLE) | 2089 BIT(FIFO_SOFT_RESET) | 2090 BIT(USB_SOFT_RESET) | 2091 BIT(M8051_RESET); 2092 writel(tmp, &dev->regs->devinit); 2093 2094 /* standard fifo and endpoint allocations */ 2095 set_fifo_mode(dev, (fifo_mode <= 2) ? fifo_mode : 0); 2096 } 2097 2098 static void usb_reset_338x(struct net2280 *dev) 2099 { 2100 u32 tmp; 2101 2102 dev->gadget.speed = USB_SPEED_UNKNOWN; 2103 (void)readl(&dev->usb->usbctl); 2104 2105 net2280_led_init(dev); 2106 2107 if (dev->bug7734_patched) { 2108 /* disable automatic responses, and irqs */ 2109 writel(0, &dev->usb->stdrsp); 2110 writel(0, &dev->regs->pciirqenb0); 2111 writel(0, &dev->regs->pciirqenb1); 2112 } 2113 2114 /* clear old dma and irq state */ 2115 for (tmp = 0; tmp < 4; tmp++) { 2116 struct net2280_ep *ep = &dev->ep[tmp + 1]; 2117 struct net2280_dma_regs __iomem *dma; 2118 2119 if (ep->dma) { 2120 abort_dma(ep); 2121 } else { 2122 dma = &dev->dma[tmp]; 2123 writel(BIT(DMA_ABORT), &dma->dmastat); 2124 writel(0, &dma->dmactl); 2125 } 2126 } 2127 2128 writel(~0, &dev->regs->irqstat0), writel(~0, &dev->regs->irqstat1); 2129 2130 if (dev->bug7734_patched) { 2131 /* reset, and enable pci */ 2132 tmp = readl(&dev->regs->devinit) | 2133 BIT(PCI_ENABLE) | 2134 BIT(FIFO_SOFT_RESET) | 2135 BIT(USB_SOFT_RESET) | 2136 BIT(M8051_RESET); 2137 2138 writel(tmp, &dev->regs->devinit); 2139 } 2140 2141 /* always ep-{1,2,3,4} ... maybe not ep-3 or ep-4 */ 2142 INIT_LIST_HEAD(&dev->gadget.ep_list); 2143 2144 for (tmp = 1; tmp < dev->n_ep; tmp++) 2145 list_add_tail(&dev->ep[tmp].ep.ep_list, &dev->gadget.ep_list); 2146 2147 } 2148 2149 static void usb_reset(struct net2280 *dev) 2150 { 2151 if (dev->quirks & PLX_LEGACY) 2152 return usb_reset_228x(dev); 2153 return usb_reset_338x(dev); 2154 } 2155 2156 static void usb_reinit_228x(struct net2280 *dev) 2157 { 2158 u32 tmp; 2159 2160 /* basic endpoint init */ 2161 for (tmp = 0; tmp < 7; tmp++) { 2162 struct net2280_ep *ep = &dev->ep[tmp]; 2163 2164 ep->ep.name = ep_info_dft[tmp].name; 2165 ep->ep.caps = ep_info_dft[tmp].caps; 2166 ep->dev = dev; 2167 ep->num = tmp; 2168 2169 if (tmp > 0 && tmp <= 4) { 2170 ep->fifo_size = 1024; 2171 ep->dma = &dev->dma[tmp - 1]; 2172 } else 2173 ep->fifo_size = 64; 2174 ep->regs = &dev->epregs[tmp]; 2175 ep->cfg = &dev->epregs[tmp]; 2176 ep_reset_228x(dev->regs, ep); 2177 } 2178 usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 64); 2179 usb_ep_set_maxpacket_limit(&dev->ep[5].ep, 64); 2180 usb_ep_set_maxpacket_limit(&dev->ep[6].ep, 64); 2181 2182 dev->gadget.ep0 = &dev->ep[0].ep; 2183 dev->ep[0].stopped = 0; 2184 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); 2185 2186 /* we want to prevent lowlevel/insecure access from the USB host, 2187 * but erratum 0119 means this enable bit is ignored 2188 */ 2189 for (tmp = 0; tmp < 5; tmp++) 2190 writel(EP_DONTUSE, &dev->dep[tmp].dep_cfg); 2191 } 2192 2193 static void usb_reinit_338x(struct net2280 *dev) 2194 { 2195 int i; 2196 u32 tmp, val; 2197 static const u32 ne[9] = { 0, 1, 2, 3, 4, 1, 2, 3, 4 }; 2198 static const u32 ep_reg_addr[9] = { 0x00, 0xC0, 0x00, 0xC0, 0x00, 2199 0x00, 0xC0, 0x00, 0xC0 }; 2200 2201 /* basic endpoint init */ 2202 for (i = 0; i < dev->n_ep; i++) { 2203 struct net2280_ep *ep = &dev->ep[i]; 2204 2205 ep->ep.name = dev->enhanced_mode ? ep_info_adv[i].name : 2206 ep_info_dft[i].name; 2207 ep->ep.caps = dev->enhanced_mode ? ep_info_adv[i].caps : 2208 ep_info_dft[i].caps; 2209 ep->dev = dev; 2210 ep->num = i; 2211 2212 if (i > 0 && i <= 4) 2213 ep->dma = &dev->dma[i - 1]; 2214 2215 if (dev->enhanced_mode) { 2216 ep->cfg = &dev->epregs[ne[i]]; 2217 /* 2218 * Set USB endpoint number, hardware allows same number 2219 * in both directions. 2220 */ 2221 if (i > 0 && i < 5) 2222 writel(ne[i], &ep->cfg->ep_cfg); 2223 ep->regs = (struct net2280_ep_regs __iomem *) 2224 (((void __iomem *)&dev->epregs[ne[i]]) + 2225 ep_reg_addr[i]); 2226 } else { 2227 ep->cfg = &dev->epregs[i]; 2228 ep->regs = &dev->epregs[i]; 2229 } 2230 2231 ep->fifo_size = (i != 0) ? 2048 : 512; 2232 2233 ep_reset_338x(dev->regs, ep); 2234 } 2235 usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 512); 2236 2237 dev->gadget.ep0 = &dev->ep[0].ep; 2238 dev->ep[0].stopped = 0; 2239 2240 /* Link layer set up */ 2241 if (dev->bug7734_patched) { 2242 tmp = readl(&dev->usb_ext->usbctl2) & 2243 ~(BIT(U1_ENABLE) | BIT(U2_ENABLE) | BIT(LTM_ENABLE)); 2244 writel(tmp, &dev->usb_ext->usbctl2); 2245 } 2246 2247 /* Hardware Defect and Workaround */ 2248 val = readl(&dev->ll_lfps_regs->ll_lfps_5); 2249 val &= ~(0xf << TIMER_LFPS_6US); 2250 val |= 0x5 << TIMER_LFPS_6US; 2251 writel(val, &dev->ll_lfps_regs->ll_lfps_5); 2252 2253 val = readl(&dev->ll_lfps_regs->ll_lfps_6); 2254 val &= ~(0xffff << TIMER_LFPS_80US); 2255 val |= 0x0100 << TIMER_LFPS_80US; 2256 writel(val, &dev->ll_lfps_regs->ll_lfps_6); 2257 2258 /* 2259 * AA_AB Errata. Issue 4. Workaround for SuperSpeed USB 2260 * Hot Reset Exit Handshake may Fail in Specific Case using 2261 * Default Register Settings. Workaround for Enumeration test. 2262 */ 2263 val = readl(&dev->ll_tsn_regs->ll_tsn_counters_2); 2264 val &= ~(0x1f << HOT_TX_NORESET_TS2); 2265 val |= 0x10 << HOT_TX_NORESET_TS2; 2266 writel(val, &dev->ll_tsn_regs->ll_tsn_counters_2); 2267 2268 val = readl(&dev->ll_tsn_regs->ll_tsn_counters_3); 2269 val &= ~(0x1f << HOT_RX_RESET_TS2); 2270 val |= 0x3 << HOT_RX_RESET_TS2; 2271 writel(val, &dev->ll_tsn_regs->ll_tsn_counters_3); 2272 2273 /* 2274 * Set Recovery Idle to Recover bit: 2275 * - On SS connections, setting Recovery Idle to Recover Fmw improves 2276 * link robustness with various hosts and hubs. 2277 * - It is safe to set for all connection speeds; all chip revisions. 2278 * - R-M-W to leave other bits undisturbed. 2279 * - Reference PLX TT-7372 2280 */ 2281 val = readl(&dev->ll_chicken_reg->ll_tsn_chicken_bit); 2282 val |= BIT(RECOVERY_IDLE_TO_RECOVER_FMW); 2283 writel(val, &dev->ll_chicken_reg->ll_tsn_chicken_bit); 2284 2285 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); 2286 2287 /* disable dedicated endpoints */ 2288 writel(0x0D, &dev->dep[0].dep_cfg); 2289 writel(0x0D, &dev->dep[1].dep_cfg); 2290 writel(0x0E, &dev->dep[2].dep_cfg); 2291 writel(0x0E, &dev->dep[3].dep_cfg); 2292 writel(0x0F, &dev->dep[4].dep_cfg); 2293 writel(0x0C, &dev->dep[5].dep_cfg); 2294 } 2295 2296 static void usb_reinit(struct net2280 *dev) 2297 { 2298 if (dev->quirks & PLX_LEGACY) 2299 return usb_reinit_228x(dev); 2300 return usb_reinit_338x(dev); 2301 } 2302 2303 static void ep0_start_228x(struct net2280 *dev) 2304 { 2305 writel(BIT(CLEAR_EP_HIDE_STATUS_PHASE) | 2306 BIT(CLEAR_NAK_OUT_PACKETS) | 2307 BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE), 2308 &dev->epregs[0].ep_rsp); 2309 2310 /* 2311 * hardware optionally handles a bunch of standard requests 2312 * that the API hides from drivers anyway. have it do so. 2313 * endpoint status/features are handled in software, to 2314 * help pass tests for some dubious behavior. 2315 */ 2316 writel(BIT(SET_TEST_MODE) | 2317 BIT(SET_ADDRESS) | 2318 BIT(DEVICE_SET_CLEAR_DEVICE_REMOTE_WAKEUP) | 2319 BIT(GET_DEVICE_STATUS) | 2320 BIT(GET_INTERFACE_STATUS), 2321 &dev->usb->stdrsp); 2322 writel(BIT(USB_ROOT_PORT_WAKEUP_ENABLE) | 2323 BIT(SELF_POWERED_USB_DEVICE) | 2324 BIT(REMOTE_WAKEUP_SUPPORT) | 2325 (dev->softconnect << USB_DETECT_ENABLE) | 2326 BIT(SELF_POWERED_STATUS), 2327 &dev->usb->usbctl); 2328 2329 /* enable irqs so we can see ep0 and general operation */ 2330 writel(BIT(SETUP_PACKET_INTERRUPT_ENABLE) | 2331 BIT(ENDPOINT_0_INTERRUPT_ENABLE), 2332 &dev->regs->pciirqenb0); 2333 writel(BIT(PCI_INTERRUPT_ENABLE) | 2334 BIT(PCI_MASTER_ABORT_RECEIVED_INTERRUPT_ENABLE) | 2335 BIT(PCI_TARGET_ABORT_RECEIVED_INTERRUPT_ENABLE) | 2336 BIT(PCI_RETRY_ABORT_INTERRUPT_ENABLE) | 2337 BIT(VBUS_INTERRUPT_ENABLE) | 2338 BIT(ROOT_PORT_RESET_INTERRUPT_ENABLE) | 2339 BIT(SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE), 2340 &dev->regs->pciirqenb1); 2341 2342 /* don't leave any writes posted */ 2343 (void) readl(&dev->usb->usbctl); 2344 } 2345 2346 static void ep0_start_338x(struct net2280 *dev) 2347 { 2348 2349 if (dev->bug7734_patched) 2350 writel(BIT(CLEAR_NAK_OUT_PACKETS_MODE) | 2351 BIT(SET_EP_HIDE_STATUS_PHASE), 2352 &dev->epregs[0].ep_rsp); 2353 2354 /* 2355 * hardware optionally handles a bunch of standard requests 2356 * that the API hides from drivers anyway. have it do so. 2357 * endpoint status/features are handled in software, to 2358 * help pass tests for some dubious behavior. 2359 */ 2360 writel(BIT(SET_ISOCHRONOUS_DELAY) | 2361 BIT(SET_SEL) | 2362 BIT(SET_TEST_MODE) | 2363 BIT(SET_ADDRESS) | 2364 BIT(GET_INTERFACE_STATUS) | 2365 BIT(GET_DEVICE_STATUS), 2366 &dev->usb->stdrsp); 2367 dev->wakeup_enable = 1; 2368 writel(BIT(USB_ROOT_PORT_WAKEUP_ENABLE) | 2369 (dev->softconnect << USB_DETECT_ENABLE) | 2370 BIT(DEVICE_REMOTE_WAKEUP_ENABLE), 2371 &dev->usb->usbctl); 2372 2373 /* enable irqs so we can see ep0 and general operation */ 2374 writel(BIT(SETUP_PACKET_INTERRUPT_ENABLE) | 2375 BIT(ENDPOINT_0_INTERRUPT_ENABLE), 2376 &dev->regs->pciirqenb0); 2377 writel(BIT(PCI_INTERRUPT_ENABLE) | 2378 BIT(ROOT_PORT_RESET_INTERRUPT_ENABLE) | 2379 BIT(SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE) | 2380 BIT(VBUS_INTERRUPT_ENABLE), 2381 &dev->regs->pciirqenb1); 2382 2383 /* don't leave any writes posted */ 2384 (void)readl(&dev->usb->usbctl); 2385 } 2386 2387 static void ep0_start(struct net2280 *dev) 2388 { 2389 if (dev->quirks & PLX_LEGACY) 2390 return ep0_start_228x(dev); 2391 return ep0_start_338x(dev); 2392 } 2393 2394 /* when a driver is successfully registered, it will receive 2395 * control requests including set_configuration(), which enables 2396 * non-control requests. then usb traffic follows until a 2397 * disconnect is reported. then a host may connect again, or 2398 * the driver might get unbound. 2399 */ 2400 static int net2280_start(struct usb_gadget *_gadget, 2401 struct usb_gadget_driver *driver) 2402 { 2403 struct net2280 *dev; 2404 int retval; 2405 unsigned i; 2406 2407 /* insist on high speed support from the driver, since 2408 * (dev->usb->xcvrdiag & FORCE_FULL_SPEED_MODE) 2409 * "must not be used in normal operation" 2410 */ 2411 if (!driver || driver->max_speed < USB_SPEED_HIGH || 2412 !driver->setup) 2413 return -EINVAL; 2414 2415 dev = container_of(_gadget, struct net2280, gadget); 2416 2417 for (i = 0; i < dev->n_ep; i++) 2418 dev->ep[i].irqs = 0; 2419 2420 /* hook up the driver ... */ 2421 driver->driver.bus = NULL; 2422 dev->driver = driver; 2423 2424 retval = device_create_file(&dev->pdev->dev, &dev_attr_function); 2425 if (retval) 2426 goto err_unbind; 2427 retval = device_create_file(&dev->pdev->dev, &dev_attr_queues); 2428 if (retval) 2429 goto err_func; 2430 2431 /* enable host detection and ep0; and we're ready 2432 * for set_configuration as well as eventual disconnect. 2433 */ 2434 net2280_led_active(dev, 1); 2435 2436 if ((dev->quirks & PLX_PCIE) && !dev->bug7734_patched) 2437 defect7374_enable_data_eps_zero(dev); 2438 2439 ep0_start(dev); 2440 2441 /* pci writes may still be posted */ 2442 return 0; 2443 2444 err_func: 2445 device_remove_file(&dev->pdev->dev, &dev_attr_function); 2446 err_unbind: 2447 dev->driver = NULL; 2448 return retval; 2449 } 2450 2451 static void stop_activity(struct net2280 *dev, struct usb_gadget_driver *driver) 2452 { 2453 int i; 2454 2455 /* don't disconnect if it's not connected */ 2456 if (dev->gadget.speed == USB_SPEED_UNKNOWN) 2457 driver = NULL; 2458 2459 /* stop hardware; prevent new request submissions; 2460 * and kill any outstanding requests. 2461 */ 2462 usb_reset(dev); 2463 for (i = 0; i < dev->n_ep; i++) 2464 nuke(&dev->ep[i]); 2465 2466 /* report disconnect; the driver is already quiesced */ 2467 if (driver) { 2468 spin_unlock(&dev->lock); 2469 driver->disconnect(&dev->gadget); 2470 spin_lock(&dev->lock); 2471 } 2472 2473 usb_reinit(dev); 2474 } 2475 2476 static int net2280_stop(struct usb_gadget *_gadget) 2477 { 2478 struct net2280 *dev; 2479 unsigned long flags; 2480 2481 dev = container_of(_gadget, struct net2280, gadget); 2482 2483 spin_lock_irqsave(&dev->lock, flags); 2484 stop_activity(dev, NULL); 2485 spin_unlock_irqrestore(&dev->lock, flags); 2486 2487 net2280_led_active(dev, 0); 2488 2489 device_remove_file(&dev->pdev->dev, &dev_attr_function); 2490 device_remove_file(&dev->pdev->dev, &dev_attr_queues); 2491 2492 dev->driver = NULL; 2493 2494 return 0; 2495 } 2496 2497 /*-------------------------------------------------------------------------*/ 2498 2499 /* handle ep0, ep-e, ep-f with 64 byte packets: packet per irq. 2500 * also works for dma-capable endpoints, in pio mode or just 2501 * to manually advance the queue after short OUT transfers. 2502 */ 2503 static void handle_ep_small(struct net2280_ep *ep) 2504 { 2505 struct net2280_request *req; 2506 u32 t; 2507 /* 0 error, 1 mid-data, 2 done */ 2508 int mode = 1; 2509 2510 if (!list_empty(&ep->queue)) 2511 req = list_entry(ep->queue.next, 2512 struct net2280_request, queue); 2513 else 2514 req = NULL; 2515 2516 /* ack all, and handle what we care about */ 2517 t = readl(&ep->regs->ep_stat); 2518 ep->irqs++; 2519 2520 ep_vdbg(ep->dev, "%s ack ep_stat %08x, req %p\n", 2521 ep->ep.name, t, req ? &req->req : NULL); 2522 2523 if (!ep->is_in || (ep->dev->quirks & PLX_2280)) 2524 writel(t & ~BIT(NAK_OUT_PACKETS), &ep->regs->ep_stat); 2525 else 2526 /* Added for 2282 */ 2527 writel(t, &ep->regs->ep_stat); 2528 2529 /* for ep0, monitor token irqs to catch data stage length errors 2530 * and to synchronize on status. 2531 * 2532 * also, to defer reporting of protocol stalls ... here's where 2533 * data or status first appears, handling stalls here should never 2534 * cause trouble on the host side.. 2535 * 2536 * control requests could be slightly faster without token synch for 2537 * status, but status can jam up that way. 2538 */ 2539 if (unlikely(ep->num == 0)) { 2540 if (ep->is_in) { 2541 /* status; stop NAKing */ 2542 if (t & BIT(DATA_OUT_PING_TOKEN_INTERRUPT)) { 2543 if (ep->dev->protocol_stall) { 2544 ep->stopped = 1; 2545 set_halt(ep); 2546 } 2547 if (!req) 2548 allow_status(ep); 2549 mode = 2; 2550 /* reply to extra IN data tokens with a zlp */ 2551 } else if (t & BIT(DATA_IN_TOKEN_INTERRUPT)) { 2552 if (ep->dev->protocol_stall) { 2553 ep->stopped = 1; 2554 set_halt(ep); 2555 mode = 2; 2556 } else if (ep->responded && 2557 !req && !ep->stopped) 2558 write_fifo(ep, NULL); 2559 } 2560 } else { 2561 /* status; stop NAKing */ 2562 if (t & BIT(DATA_IN_TOKEN_INTERRUPT)) { 2563 if (ep->dev->protocol_stall) { 2564 ep->stopped = 1; 2565 set_halt(ep); 2566 } 2567 mode = 2; 2568 /* an extra OUT token is an error */ 2569 } else if (((t & BIT(DATA_OUT_PING_TOKEN_INTERRUPT)) && 2570 req && 2571 req->req.actual == req->req.length) || 2572 (ep->responded && !req)) { 2573 ep->dev->protocol_stall = 1; 2574 set_halt(ep); 2575 ep->stopped = 1; 2576 if (req) 2577 done(ep, req, -EOVERFLOW); 2578 req = NULL; 2579 } 2580 } 2581 } 2582 2583 if (unlikely(!req)) 2584 return; 2585 2586 /* manual DMA queue advance after short OUT */ 2587 if (likely(ep->dma)) { 2588 if (t & BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT)) { 2589 struct net2280_request *stuck_req = NULL; 2590 int stopped = ep->stopped; 2591 int num_completed; 2592 int stuck = 0; 2593 u32 count; 2594 2595 /* TRANSFERRED works around OUT_DONE erratum 0112. 2596 * we expect (N <= maxpacket) bytes; host wrote M. 2597 * iff (M < N) we won't ever see a DMA interrupt. 2598 */ 2599 ep->stopped = 1; 2600 for (count = 0; ; t = readl(&ep->regs->ep_stat)) { 2601 2602 /* any preceding dma transfers must finish. 2603 * dma handles (M >= N), may empty the queue 2604 */ 2605 num_completed = scan_dma_completions(ep); 2606 if (unlikely(list_empty(&ep->queue) || 2607 ep->out_overflow)) { 2608 req = NULL; 2609 break; 2610 } 2611 req = list_entry(ep->queue.next, 2612 struct net2280_request, queue); 2613 2614 /* here either (M < N), a "real" short rx; 2615 * or (M == N) and the queue didn't empty 2616 */ 2617 if (likely(t & BIT(FIFO_EMPTY))) { 2618 count = readl(&ep->dma->dmacount); 2619 count &= DMA_BYTE_COUNT_MASK; 2620 if (readl(&ep->dma->dmadesc) 2621 != req->td_dma) 2622 req = NULL; 2623 break; 2624 } 2625 2626 /* Escape loop if no dma transfers completed 2627 * after few retries. 2628 */ 2629 if (num_completed == 0) { 2630 if (stuck_req == req && 2631 readl(&ep->dma->dmadesc) != 2632 req->td_dma && stuck++ > 5) { 2633 count = readl( 2634 &ep->dma->dmacount); 2635 count &= DMA_BYTE_COUNT_MASK; 2636 req = NULL; 2637 ep_dbg(ep->dev, "%s escape stuck %d, count %u\n", 2638 ep->ep.name, stuck, 2639 count); 2640 break; 2641 } else if (stuck_req != req) { 2642 stuck_req = req; 2643 stuck = 0; 2644 } 2645 } else { 2646 stuck_req = NULL; 2647 stuck = 0; 2648 } 2649 2650 udelay(1); 2651 } 2652 2653 /* stop DMA, leave ep NAKing */ 2654 writel(BIT(DMA_ABORT), &ep->dma->dmastat); 2655 spin_stop_dma(ep->dma); 2656 2657 if (likely(req)) { 2658 req->td->dmacount = 0; 2659 t = readl(&ep->regs->ep_avail); 2660 dma_done(ep, req, count, 2661 (ep->out_overflow || t) 2662 ? -EOVERFLOW : 0); 2663 } 2664 2665 /* also flush to prevent erratum 0106 trouble */ 2666 if (unlikely(ep->out_overflow || 2667 (ep->dev->chiprev == 0x0100 && 2668 ep->dev->gadget.speed 2669 == USB_SPEED_FULL))) { 2670 out_flush(ep); 2671 ep->out_overflow = 0; 2672 } 2673 2674 /* (re)start dma if needed, stop NAKing */ 2675 ep->stopped = stopped; 2676 if (!list_empty(&ep->queue)) 2677 restart_dma(ep); 2678 } else 2679 ep_dbg(ep->dev, "%s dma ep_stat %08x ??\n", 2680 ep->ep.name, t); 2681 return; 2682 2683 /* data packet(s) received (in the fifo, OUT) */ 2684 } else if (t & BIT(DATA_PACKET_RECEIVED_INTERRUPT)) { 2685 if (read_fifo(ep, req) && ep->num != 0) 2686 mode = 2; 2687 2688 /* data packet(s) transmitted (IN) */ 2689 } else if (t & BIT(DATA_PACKET_TRANSMITTED_INTERRUPT)) { 2690 unsigned len; 2691 2692 len = req->req.length - req->req.actual; 2693 if (len > ep->ep.maxpacket) 2694 len = ep->ep.maxpacket; 2695 req->req.actual += len; 2696 2697 /* if we wrote it all, we're usually done */ 2698 /* send zlps until the status stage */ 2699 if ((req->req.actual == req->req.length) && 2700 (!req->req.zero || len != ep->ep.maxpacket) && ep->num) 2701 mode = 2; 2702 2703 /* there was nothing to do ... */ 2704 } else if (mode == 1) 2705 return; 2706 2707 /* done */ 2708 if (mode == 2) { 2709 /* stream endpoints often resubmit/unlink in completion */ 2710 done(ep, req, 0); 2711 2712 /* maybe advance queue to next request */ 2713 if (ep->num == 0) { 2714 /* NOTE: net2280 could let gadget driver start the 2715 * status stage later. since not all controllers let 2716 * them control that, the api doesn't (yet) allow it. 2717 */ 2718 if (!ep->stopped) 2719 allow_status(ep); 2720 req = NULL; 2721 } else { 2722 if (!list_empty(&ep->queue) && !ep->stopped) 2723 req = list_entry(ep->queue.next, 2724 struct net2280_request, queue); 2725 else 2726 req = NULL; 2727 if (req && !ep->is_in) 2728 stop_out_naking(ep); 2729 } 2730 } 2731 2732 /* is there a buffer for the next packet? 2733 * for best streaming performance, make sure there is one. 2734 */ 2735 if (req && !ep->stopped) { 2736 2737 /* load IN fifo with next packet (may be zlp) */ 2738 if (t & BIT(DATA_PACKET_TRANSMITTED_INTERRUPT)) 2739 write_fifo(ep, &req->req); 2740 } 2741 } 2742 2743 static struct net2280_ep *get_ep_by_addr(struct net2280 *dev, u16 wIndex) 2744 { 2745 struct net2280_ep *ep; 2746 2747 if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0) 2748 return &dev->ep[0]; 2749 list_for_each_entry(ep, &dev->gadget.ep_list, ep.ep_list) { 2750 u8 bEndpointAddress; 2751 2752 if (!ep->desc) 2753 continue; 2754 bEndpointAddress = ep->desc->bEndpointAddress; 2755 if ((wIndex ^ bEndpointAddress) & USB_DIR_IN) 2756 continue; 2757 if ((wIndex & 0x0f) == (bEndpointAddress & 0x0f)) 2758 return ep; 2759 } 2760 return NULL; 2761 } 2762 2763 static void defect7374_workaround(struct net2280 *dev, struct usb_ctrlrequest r) 2764 { 2765 u32 scratch, fsmvalue; 2766 u32 ack_wait_timeout, state; 2767 2768 /* Workaround for Defect 7374 (U1/U2 erroneously rejected): */ 2769 scratch = get_idx_reg(dev->regs, SCRATCH); 2770 fsmvalue = scratch & (0xf << DEFECT7374_FSM_FIELD); 2771 scratch &= ~(0xf << DEFECT7374_FSM_FIELD); 2772 2773 if (!((fsmvalue == DEFECT7374_FSM_WAITING_FOR_CONTROL_READ) && 2774 (r.bRequestType & USB_DIR_IN))) 2775 return; 2776 2777 /* This is the first Control Read for this connection: */ 2778 if (!(readl(&dev->usb->usbstat) & BIT(SUPER_SPEED_MODE))) { 2779 /* 2780 * Connection is NOT SS: 2781 * - Connection must be FS or HS. 2782 * - This FSM state should allow workaround software to 2783 * run after the next USB connection. 2784 */ 2785 scratch |= DEFECT7374_FSM_NON_SS_CONTROL_READ; 2786 dev->bug7734_patched = 1; 2787 goto restore_data_eps; 2788 } 2789 2790 /* Connection is SS: */ 2791 for (ack_wait_timeout = 0; 2792 ack_wait_timeout < DEFECT_7374_NUMBEROF_MAX_WAIT_LOOPS; 2793 ack_wait_timeout++) { 2794 2795 state = readl(&dev->plregs->pl_ep_status_1) 2796 & (0xff << STATE); 2797 if ((state >= (ACK_GOOD_NORMAL << STATE)) && 2798 (state <= (ACK_GOOD_MORE_ACKS_TO_COME << STATE))) { 2799 scratch |= DEFECT7374_FSM_SS_CONTROL_READ; 2800 dev->bug7734_patched = 1; 2801 break; 2802 } 2803 2804 /* 2805 * We have not yet received host's Data Phase ACK 2806 * - Wait and try again. 2807 */ 2808 udelay(DEFECT_7374_PROCESSOR_WAIT_TIME); 2809 2810 continue; 2811 } 2812 2813 2814 if (ack_wait_timeout >= DEFECT_7374_NUMBEROF_MAX_WAIT_LOOPS) { 2815 ep_err(dev, "FAIL: Defect 7374 workaround waited but failed " 2816 "to detect SS host's data phase ACK."); 2817 ep_err(dev, "PL_EP_STATUS_1(23:16):.Expected from 0x11 to 0x16" 2818 "got 0x%2.2x.\n", state >> STATE); 2819 } else { 2820 ep_warn(dev, "INFO: Defect 7374 workaround waited about\n" 2821 "%duSec for Control Read Data Phase ACK\n", 2822 DEFECT_7374_PROCESSOR_WAIT_TIME * ack_wait_timeout); 2823 } 2824 2825 restore_data_eps: 2826 /* 2827 * Restore data EPs to their pre-workaround settings (disabled, 2828 * initialized, and other details). 2829 */ 2830 defect7374_disable_data_eps(dev); 2831 2832 set_idx_reg(dev->regs, SCRATCH, scratch); 2833 2834 return; 2835 } 2836 2837 static void ep_clear_seqnum(struct net2280_ep *ep) 2838 { 2839 struct net2280 *dev = ep->dev; 2840 u32 val; 2841 static const u32 ep_pl[9] = { 0, 3, 4, 7, 8, 2, 5, 6, 9 }; 2842 2843 val = readl(&dev->plregs->pl_ep_ctrl) & ~0x1f; 2844 val |= ep_pl[ep->num]; 2845 writel(val, &dev->plregs->pl_ep_ctrl); 2846 val |= BIT(SEQUENCE_NUMBER_RESET); 2847 writel(val, &dev->plregs->pl_ep_ctrl); 2848 2849 return; 2850 } 2851 2852 static void handle_stat0_irqs_superspeed(struct net2280 *dev, 2853 struct net2280_ep *ep, struct usb_ctrlrequest r) 2854 { 2855 int tmp = 0; 2856 2857 #define w_value le16_to_cpu(r.wValue) 2858 #define w_index le16_to_cpu(r.wIndex) 2859 #define w_length le16_to_cpu(r.wLength) 2860 2861 switch (r.bRequest) { 2862 struct net2280_ep *e; 2863 u16 status; 2864 2865 case USB_REQ_SET_CONFIGURATION: 2866 dev->addressed_state = !w_value; 2867 goto usb3_delegate; 2868 2869 case USB_REQ_GET_STATUS: 2870 switch (r.bRequestType) { 2871 case (USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_DEVICE): 2872 status = dev->wakeup_enable ? 0x02 : 0x00; 2873 if (dev->gadget.is_selfpowered) 2874 status |= BIT(0); 2875 status |= (dev->u1_enable << 2 | dev->u2_enable << 3 | 2876 dev->ltm_enable << 4); 2877 writel(0, &dev->epregs[0].ep_irqenb); 2878 set_fifo_bytecount(ep, sizeof(status)); 2879 writel((__force u32) status, &dev->epregs[0].ep_data); 2880 allow_status_338x(ep); 2881 break; 2882 2883 case (USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_ENDPOINT): 2884 e = get_ep_by_addr(dev, w_index); 2885 if (!e) 2886 goto do_stall3; 2887 status = readl(&e->regs->ep_rsp) & 2888 BIT(CLEAR_ENDPOINT_HALT); 2889 writel(0, &dev->epregs[0].ep_irqenb); 2890 set_fifo_bytecount(ep, sizeof(status)); 2891 writel((__force u32) status, &dev->epregs[0].ep_data); 2892 allow_status_338x(ep); 2893 break; 2894 2895 default: 2896 goto usb3_delegate; 2897 } 2898 break; 2899 2900 case USB_REQ_CLEAR_FEATURE: 2901 switch (r.bRequestType) { 2902 case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE): 2903 if (!dev->addressed_state) { 2904 switch (w_value) { 2905 case USB_DEVICE_U1_ENABLE: 2906 dev->u1_enable = 0; 2907 writel(readl(&dev->usb_ext->usbctl2) & 2908 ~BIT(U1_ENABLE), 2909 &dev->usb_ext->usbctl2); 2910 allow_status_338x(ep); 2911 goto next_endpoints3; 2912 2913 case USB_DEVICE_U2_ENABLE: 2914 dev->u2_enable = 0; 2915 writel(readl(&dev->usb_ext->usbctl2) & 2916 ~BIT(U2_ENABLE), 2917 &dev->usb_ext->usbctl2); 2918 allow_status_338x(ep); 2919 goto next_endpoints3; 2920 2921 case USB_DEVICE_LTM_ENABLE: 2922 dev->ltm_enable = 0; 2923 writel(readl(&dev->usb_ext->usbctl2) & 2924 ~BIT(LTM_ENABLE), 2925 &dev->usb_ext->usbctl2); 2926 allow_status_338x(ep); 2927 goto next_endpoints3; 2928 2929 default: 2930 break; 2931 } 2932 } 2933 if (w_value == USB_DEVICE_REMOTE_WAKEUP) { 2934 dev->wakeup_enable = 0; 2935 writel(readl(&dev->usb->usbctl) & 2936 ~BIT(DEVICE_REMOTE_WAKEUP_ENABLE), 2937 &dev->usb->usbctl); 2938 allow_status_338x(ep); 2939 break; 2940 } 2941 goto usb3_delegate; 2942 2943 case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_ENDPOINT): 2944 e = get_ep_by_addr(dev, w_index); 2945 if (!e) 2946 goto do_stall3; 2947 if (w_value != USB_ENDPOINT_HALT) 2948 goto do_stall3; 2949 ep_vdbg(dev, "%s clear halt\n", e->ep.name); 2950 /* 2951 * Workaround for SS SeqNum not cleared via 2952 * Endpoint Halt (Clear) bit. select endpoint 2953 */ 2954 ep_clear_seqnum(e); 2955 clear_halt(e); 2956 if (!list_empty(&e->queue) && e->td_dma) 2957 restart_dma(e); 2958 allow_status(ep); 2959 ep->stopped = 1; 2960 break; 2961 2962 default: 2963 goto usb3_delegate; 2964 } 2965 break; 2966 case USB_REQ_SET_FEATURE: 2967 switch (r.bRequestType) { 2968 case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE): 2969 if (!dev->addressed_state) { 2970 switch (w_value) { 2971 case USB_DEVICE_U1_ENABLE: 2972 dev->u1_enable = 1; 2973 writel(readl(&dev->usb_ext->usbctl2) | 2974 BIT(U1_ENABLE), 2975 &dev->usb_ext->usbctl2); 2976 allow_status_338x(ep); 2977 goto next_endpoints3; 2978 2979 case USB_DEVICE_U2_ENABLE: 2980 dev->u2_enable = 1; 2981 writel(readl(&dev->usb_ext->usbctl2) | 2982 BIT(U2_ENABLE), 2983 &dev->usb_ext->usbctl2); 2984 allow_status_338x(ep); 2985 goto next_endpoints3; 2986 2987 case USB_DEVICE_LTM_ENABLE: 2988 dev->ltm_enable = 1; 2989 writel(readl(&dev->usb_ext->usbctl2) | 2990 BIT(LTM_ENABLE), 2991 &dev->usb_ext->usbctl2); 2992 allow_status_338x(ep); 2993 goto next_endpoints3; 2994 default: 2995 break; 2996 } 2997 } 2998 2999 if (w_value == USB_DEVICE_REMOTE_WAKEUP) { 3000 dev->wakeup_enable = 1; 3001 writel(readl(&dev->usb->usbctl) | 3002 BIT(DEVICE_REMOTE_WAKEUP_ENABLE), 3003 &dev->usb->usbctl); 3004 allow_status_338x(ep); 3005 break; 3006 } 3007 goto usb3_delegate; 3008 3009 case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_ENDPOINT): 3010 e = get_ep_by_addr(dev, w_index); 3011 if (!e || (w_value != USB_ENDPOINT_HALT)) 3012 goto do_stall3; 3013 ep->stopped = 1; 3014 if (ep->num == 0) 3015 ep->dev->protocol_stall = 1; 3016 else { 3017 if (ep->dma) 3018 abort_dma(ep); 3019 set_halt(ep); 3020 } 3021 allow_status_338x(ep); 3022 break; 3023 3024 default: 3025 goto usb3_delegate; 3026 } 3027 3028 break; 3029 default: 3030 3031 usb3_delegate: 3032 ep_vdbg(dev, "setup %02x.%02x v%04x i%04x l%04x ep_cfg %08x\n", 3033 r.bRequestType, r.bRequest, 3034 w_value, w_index, w_length, 3035 readl(&ep->cfg->ep_cfg)); 3036 3037 ep->responded = 0; 3038 spin_unlock(&dev->lock); 3039 tmp = dev->driver->setup(&dev->gadget, &r); 3040 spin_lock(&dev->lock); 3041 } 3042 do_stall3: 3043 if (tmp < 0) { 3044 ep_vdbg(dev, "req %02x.%02x protocol STALL; stat %d\n", 3045 r.bRequestType, r.bRequest, tmp); 3046 dev->protocol_stall = 1; 3047 /* TD 9.9 Halt Endpoint test. TD 9.22 Set feature test */ 3048 set_halt(ep); 3049 } 3050 3051 next_endpoints3: 3052 3053 #undef w_value 3054 #undef w_index 3055 #undef w_length 3056 3057 return; 3058 } 3059 3060 static void usb338x_handle_ep_intr(struct net2280 *dev, u32 stat0) 3061 { 3062 u32 index; 3063 u32 bit; 3064 3065 for (index = 0; index < ARRAY_SIZE(ep_bit); index++) { 3066 bit = BIT(ep_bit[index]); 3067 3068 if (!stat0) 3069 break; 3070 3071 if (!(stat0 & bit)) 3072 continue; 3073 3074 stat0 &= ~bit; 3075 3076 handle_ep_small(&dev->ep[index]); 3077 } 3078 } 3079 3080 static void handle_stat0_irqs(struct net2280 *dev, u32 stat) 3081 { 3082 struct net2280_ep *ep; 3083 u32 num, scratch; 3084 3085 /* most of these don't need individual acks */ 3086 stat &= ~BIT(INTA_ASSERTED); 3087 if (!stat) 3088 return; 3089 /* ep_dbg(dev, "irqstat0 %04x\n", stat); */ 3090 3091 /* starting a control request? */ 3092 if (unlikely(stat & BIT(SETUP_PACKET_INTERRUPT))) { 3093 union { 3094 u32 raw[2]; 3095 struct usb_ctrlrequest r; 3096 } u; 3097 int tmp; 3098 struct net2280_request *req; 3099 3100 if (dev->gadget.speed == USB_SPEED_UNKNOWN) { 3101 u32 val = readl(&dev->usb->usbstat); 3102 if (val & BIT(SUPER_SPEED)) { 3103 dev->gadget.speed = USB_SPEED_SUPER; 3104 usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 3105 EP0_SS_MAX_PACKET_SIZE); 3106 } else if (val & BIT(HIGH_SPEED)) { 3107 dev->gadget.speed = USB_SPEED_HIGH; 3108 usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 3109 EP0_HS_MAX_PACKET_SIZE); 3110 } else { 3111 dev->gadget.speed = USB_SPEED_FULL; 3112 usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 3113 EP0_HS_MAX_PACKET_SIZE); 3114 } 3115 net2280_led_speed(dev, dev->gadget.speed); 3116 ep_dbg(dev, "%s\n", 3117 usb_speed_string(dev->gadget.speed)); 3118 } 3119 3120 ep = &dev->ep[0]; 3121 ep->irqs++; 3122 3123 /* make sure any leftover request state is cleared */ 3124 stat &= ~BIT(ENDPOINT_0_INTERRUPT); 3125 while (!list_empty(&ep->queue)) { 3126 req = list_entry(ep->queue.next, 3127 struct net2280_request, queue); 3128 done(ep, req, (req->req.actual == req->req.length) 3129 ? 0 : -EPROTO); 3130 } 3131 ep->stopped = 0; 3132 dev->protocol_stall = 0; 3133 if (!(dev->quirks & PLX_PCIE)) { 3134 if (ep->dev->quirks & PLX_2280) 3135 tmp = BIT(FIFO_OVERFLOW) | 3136 BIT(FIFO_UNDERFLOW); 3137 else 3138 tmp = 0; 3139 3140 writel(tmp | BIT(TIMEOUT) | 3141 BIT(USB_STALL_SENT) | 3142 BIT(USB_IN_NAK_SENT) | 3143 BIT(USB_IN_ACK_RCVD) | 3144 BIT(USB_OUT_PING_NAK_SENT) | 3145 BIT(USB_OUT_ACK_SENT) | 3146 BIT(SHORT_PACKET_OUT_DONE_INTERRUPT) | 3147 BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT) | 3148 BIT(DATA_PACKET_RECEIVED_INTERRUPT) | 3149 BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) | 3150 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | 3151 BIT(DATA_IN_TOKEN_INTERRUPT), 3152 &ep->regs->ep_stat); 3153 } 3154 u.raw[0] = readl(&dev->usb->setup0123); 3155 u.raw[1] = readl(&dev->usb->setup4567); 3156 3157 cpu_to_le32s(&u.raw[0]); 3158 cpu_to_le32s(&u.raw[1]); 3159 3160 if ((dev->quirks & PLX_PCIE) && !dev->bug7734_patched) 3161 defect7374_workaround(dev, u.r); 3162 3163 tmp = 0; 3164 3165 #define w_value le16_to_cpu(u.r.wValue) 3166 #define w_index le16_to_cpu(u.r.wIndex) 3167 #define w_length le16_to_cpu(u.r.wLength) 3168 3169 /* ack the irq */ 3170 writel(BIT(SETUP_PACKET_INTERRUPT), &dev->regs->irqstat0); 3171 stat ^= BIT(SETUP_PACKET_INTERRUPT); 3172 3173 /* watch control traffic at the token level, and force 3174 * synchronization before letting the status stage happen. 3175 * FIXME ignore tokens we'll NAK, until driver responds. 3176 * that'll mean a lot less irqs for some drivers. 3177 */ 3178 ep->is_in = (u.r.bRequestType & USB_DIR_IN) != 0; 3179 if (ep->is_in) { 3180 scratch = BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) | 3181 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | 3182 BIT(DATA_IN_TOKEN_INTERRUPT); 3183 stop_out_naking(ep); 3184 } else 3185 scratch = BIT(DATA_PACKET_RECEIVED_INTERRUPT) | 3186 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | 3187 BIT(DATA_IN_TOKEN_INTERRUPT); 3188 writel(scratch, &dev->epregs[0].ep_irqenb); 3189 3190 /* we made the hardware handle most lowlevel requests; 3191 * everything else goes uplevel to the gadget code. 3192 */ 3193 ep->responded = 1; 3194 3195 if (dev->gadget.speed == USB_SPEED_SUPER) { 3196 handle_stat0_irqs_superspeed(dev, ep, u.r); 3197 goto next_endpoints; 3198 } 3199 3200 switch (u.r.bRequest) { 3201 case USB_REQ_GET_STATUS: { 3202 struct net2280_ep *e; 3203 __le32 status; 3204 3205 /* hw handles device and interface status */ 3206 if (u.r.bRequestType != (USB_DIR_IN|USB_RECIP_ENDPOINT)) 3207 goto delegate; 3208 e = get_ep_by_addr(dev, w_index); 3209 if (!e || w_length > 2) 3210 goto do_stall; 3211 3212 if (readl(&e->regs->ep_rsp) & BIT(SET_ENDPOINT_HALT)) 3213 status = cpu_to_le32(1); 3214 else 3215 status = cpu_to_le32(0); 3216 3217 /* don't bother with a request object! */ 3218 writel(0, &dev->epregs[0].ep_irqenb); 3219 set_fifo_bytecount(ep, w_length); 3220 writel((__force u32)status, &dev->epregs[0].ep_data); 3221 allow_status(ep); 3222 ep_vdbg(dev, "%s stat %02x\n", ep->ep.name, status); 3223 goto next_endpoints; 3224 } 3225 break; 3226 case USB_REQ_CLEAR_FEATURE: { 3227 struct net2280_ep *e; 3228 3229 /* hw handles device features */ 3230 if (u.r.bRequestType != USB_RECIP_ENDPOINT) 3231 goto delegate; 3232 if (w_value != USB_ENDPOINT_HALT || w_length != 0) 3233 goto do_stall; 3234 e = get_ep_by_addr(dev, w_index); 3235 if (!e) 3236 goto do_stall; 3237 if (e->wedged) { 3238 ep_vdbg(dev, "%s wedged, halt not cleared\n", 3239 ep->ep.name); 3240 } else { 3241 ep_vdbg(dev, "%s clear halt\n", e->ep.name); 3242 clear_halt(e); 3243 if ((ep->dev->quirks & PLX_PCIE) && 3244 !list_empty(&e->queue) && e->td_dma) 3245 restart_dma(e); 3246 } 3247 allow_status(ep); 3248 goto next_endpoints; 3249 } 3250 break; 3251 case USB_REQ_SET_FEATURE: { 3252 struct net2280_ep *e; 3253 3254 /* hw handles device features */ 3255 if (u.r.bRequestType != USB_RECIP_ENDPOINT) 3256 goto delegate; 3257 if (w_value != USB_ENDPOINT_HALT || w_length != 0) 3258 goto do_stall; 3259 e = get_ep_by_addr(dev, w_index); 3260 if (!e) 3261 goto do_stall; 3262 if (e->ep.name == ep0name) 3263 goto do_stall; 3264 set_halt(e); 3265 if ((dev->quirks & PLX_PCIE) && e->dma) 3266 abort_dma(e); 3267 allow_status(ep); 3268 ep_vdbg(dev, "%s set halt\n", ep->ep.name); 3269 goto next_endpoints; 3270 } 3271 break; 3272 default: 3273 delegate: 3274 ep_vdbg(dev, "setup %02x.%02x v%04x i%04x l%04x " 3275 "ep_cfg %08x\n", 3276 u.r.bRequestType, u.r.bRequest, 3277 w_value, w_index, w_length, 3278 readl(&ep->cfg->ep_cfg)); 3279 ep->responded = 0; 3280 spin_unlock(&dev->lock); 3281 tmp = dev->driver->setup(&dev->gadget, &u.r); 3282 spin_lock(&dev->lock); 3283 } 3284 3285 /* stall ep0 on error */ 3286 if (tmp < 0) { 3287 do_stall: 3288 ep_vdbg(dev, "req %02x.%02x protocol STALL; stat %d\n", 3289 u.r.bRequestType, u.r.bRequest, tmp); 3290 dev->protocol_stall = 1; 3291 } 3292 3293 /* some in/out token irq should follow; maybe stall then. 3294 * driver must queue a request (even zlp) or halt ep0 3295 * before the host times out. 3296 */ 3297 } 3298 3299 #undef w_value 3300 #undef w_index 3301 #undef w_length 3302 3303 next_endpoints: 3304 if ((dev->quirks & PLX_PCIE) && dev->enhanced_mode) { 3305 u32 mask = (BIT(ENDPOINT_0_INTERRUPT) | 3306 USB3380_IRQSTAT0_EP_INTR_MASK_IN | 3307 USB3380_IRQSTAT0_EP_INTR_MASK_OUT); 3308 3309 if (stat & mask) { 3310 usb338x_handle_ep_intr(dev, stat & mask); 3311 stat &= ~mask; 3312 } 3313 } else { 3314 /* endpoint data irq ? */ 3315 scratch = stat & 0x7f; 3316 stat &= ~0x7f; 3317 for (num = 0; scratch; num++) { 3318 u32 t; 3319 3320 /* do this endpoint's FIFO and queue need tending? */ 3321 t = BIT(num); 3322 if ((scratch & t) == 0) 3323 continue; 3324 scratch ^= t; 3325 3326 ep = &dev->ep[num]; 3327 handle_ep_small(ep); 3328 } 3329 } 3330 3331 if (stat) 3332 ep_dbg(dev, "unhandled irqstat0 %08x\n", stat); 3333 } 3334 3335 #define DMA_INTERRUPTS (BIT(DMA_D_INTERRUPT) | \ 3336 BIT(DMA_C_INTERRUPT) | \ 3337 BIT(DMA_B_INTERRUPT) | \ 3338 BIT(DMA_A_INTERRUPT)) 3339 #define PCI_ERROR_INTERRUPTS ( \ 3340 BIT(PCI_MASTER_ABORT_RECEIVED_INTERRUPT) | \ 3341 BIT(PCI_TARGET_ABORT_RECEIVED_INTERRUPT) | \ 3342 BIT(PCI_RETRY_ABORT_INTERRUPT)) 3343 3344 static void handle_stat1_irqs(struct net2280 *dev, u32 stat) 3345 __releases(dev->lock) 3346 __acquires(dev->lock) 3347 { 3348 struct net2280_ep *ep; 3349 u32 tmp, num, mask, scratch; 3350 3351 /* after disconnect there's nothing else to do! */ 3352 tmp = BIT(VBUS_INTERRUPT) | BIT(ROOT_PORT_RESET_INTERRUPT); 3353 mask = BIT(SUPER_SPEED) | BIT(HIGH_SPEED) | BIT(FULL_SPEED); 3354 3355 /* VBUS disconnect is indicated by VBUS_PIN and VBUS_INTERRUPT set. 3356 * Root Port Reset is indicated by ROOT_PORT_RESET_INTERRUPT set and 3357 * both HIGH_SPEED and FULL_SPEED clear (as ROOT_PORT_RESET_INTERRUPT 3358 * only indicates a change in the reset state). 3359 */ 3360 if (stat & tmp) { 3361 bool reset = false; 3362 bool disconnect = false; 3363 3364 /* 3365 * Ignore disconnects and resets if the speed hasn't been set. 3366 * VBUS can bounce and there's always an initial reset. 3367 */ 3368 writel(tmp, &dev->regs->irqstat1); 3369 if (dev->gadget.speed != USB_SPEED_UNKNOWN) { 3370 if ((stat & BIT(VBUS_INTERRUPT)) && 3371 (readl(&dev->usb->usbctl) & 3372 BIT(VBUS_PIN)) == 0) { 3373 disconnect = true; 3374 ep_dbg(dev, "disconnect %s\n", 3375 dev->driver->driver.name); 3376 } else if ((stat & BIT(ROOT_PORT_RESET_INTERRUPT)) && 3377 (readl(&dev->usb->usbstat) & mask) 3378 == 0) { 3379 reset = true; 3380 ep_dbg(dev, "reset %s\n", 3381 dev->driver->driver.name); 3382 } 3383 3384 if (disconnect || reset) { 3385 stop_activity(dev, dev->driver); 3386 ep0_start(dev); 3387 spin_unlock(&dev->lock); 3388 if (reset) 3389 usb_gadget_udc_reset 3390 (&dev->gadget, dev->driver); 3391 else 3392 (dev->driver->disconnect) 3393 (&dev->gadget); 3394 spin_lock(&dev->lock); 3395 return; 3396 } 3397 } 3398 stat &= ~tmp; 3399 3400 /* vBUS can bounce ... one of many reasons to ignore the 3401 * notion of hotplug events on bus connect/disconnect! 3402 */ 3403 if (!stat) 3404 return; 3405 } 3406 3407 /* NOTE: chip stays in PCI D0 state for now, but it could 3408 * enter D1 to save more power 3409 */ 3410 tmp = BIT(SUSPEND_REQUEST_CHANGE_INTERRUPT); 3411 if (stat & tmp) { 3412 writel(tmp, &dev->regs->irqstat1); 3413 spin_unlock(&dev->lock); 3414 if (stat & BIT(SUSPEND_REQUEST_INTERRUPT)) { 3415 if (dev->driver->suspend) 3416 dev->driver->suspend(&dev->gadget); 3417 if (!enable_suspend) 3418 stat &= ~BIT(SUSPEND_REQUEST_INTERRUPT); 3419 } else { 3420 if (dev->driver->resume) 3421 dev->driver->resume(&dev->gadget); 3422 /* at high speed, note erratum 0133 */ 3423 } 3424 spin_lock(&dev->lock); 3425 stat &= ~tmp; 3426 } 3427 3428 /* clear any other status/irqs */ 3429 if (stat) 3430 writel(stat, &dev->regs->irqstat1); 3431 3432 /* some status we can just ignore */ 3433 if (dev->quirks & PLX_2280) 3434 stat &= ~(BIT(CONTROL_STATUS_INTERRUPT) | 3435 BIT(SUSPEND_REQUEST_INTERRUPT) | 3436 BIT(RESUME_INTERRUPT) | 3437 BIT(SOF_INTERRUPT)); 3438 else 3439 stat &= ~(BIT(CONTROL_STATUS_INTERRUPT) | 3440 BIT(RESUME_INTERRUPT) | 3441 BIT(SOF_DOWN_INTERRUPT) | 3442 BIT(SOF_INTERRUPT)); 3443 3444 if (!stat) 3445 return; 3446 /* ep_dbg(dev, "irqstat1 %08x\n", stat);*/ 3447 3448 /* DMA status, for ep-{a,b,c,d} */ 3449 scratch = stat & DMA_INTERRUPTS; 3450 stat &= ~DMA_INTERRUPTS; 3451 scratch >>= 9; 3452 for (num = 0; scratch; num++) { 3453 struct net2280_dma_regs __iomem *dma; 3454 3455 tmp = BIT(num); 3456 if ((tmp & scratch) == 0) 3457 continue; 3458 scratch ^= tmp; 3459 3460 ep = &dev->ep[num + 1]; 3461 dma = ep->dma; 3462 3463 if (!dma) 3464 continue; 3465 3466 /* clear ep's dma status */ 3467 tmp = readl(&dma->dmastat); 3468 writel(tmp, &dma->dmastat); 3469 3470 /* dma sync*/ 3471 if (dev->quirks & PLX_PCIE) { 3472 u32 r_dmacount = readl(&dma->dmacount); 3473 if (!ep->is_in && (r_dmacount & 0x00FFFFFF) && 3474 (tmp & BIT(DMA_TRANSACTION_DONE_INTERRUPT))) 3475 continue; 3476 } 3477 3478 if (!(tmp & BIT(DMA_TRANSACTION_DONE_INTERRUPT))) { 3479 ep_dbg(ep->dev, "%s no xact done? %08x\n", 3480 ep->ep.name, tmp); 3481 continue; 3482 } 3483 stop_dma(ep->dma); 3484 3485 /* OUT transfers terminate when the data from the 3486 * host is in our memory. Process whatever's done. 3487 * On this path, we know transfer's last packet wasn't 3488 * less than req->length. NAK_OUT_PACKETS may be set, 3489 * or the FIFO may already be holding new packets. 3490 * 3491 * IN transfers can linger in the FIFO for a very 3492 * long time ... we ignore that for now, accounting 3493 * precisely (like PIO does) needs per-packet irqs 3494 */ 3495 scan_dma_completions(ep); 3496 3497 /* disable dma on inactive queues; else maybe restart */ 3498 if (!list_empty(&ep->queue)) { 3499 tmp = readl(&dma->dmactl); 3500 restart_dma(ep); 3501 } 3502 ep->irqs++; 3503 } 3504 3505 /* NOTE: there are other PCI errors we might usefully notice. 3506 * if they appear very often, here's where to try recovering. 3507 */ 3508 if (stat & PCI_ERROR_INTERRUPTS) { 3509 ep_err(dev, "pci dma error; stat %08x\n", stat); 3510 stat &= ~PCI_ERROR_INTERRUPTS; 3511 /* these are fatal errors, but "maybe" they won't 3512 * happen again ... 3513 */ 3514 stop_activity(dev, dev->driver); 3515 ep0_start(dev); 3516 stat = 0; 3517 } 3518 3519 if (stat) 3520 ep_dbg(dev, "unhandled irqstat1 %08x\n", stat); 3521 } 3522 3523 static irqreturn_t net2280_irq(int irq, void *_dev) 3524 { 3525 struct net2280 *dev = _dev; 3526 3527 /* shared interrupt, not ours */ 3528 if ((dev->quirks & PLX_LEGACY) && 3529 (!(readl(&dev->regs->irqstat0) & BIT(INTA_ASSERTED)))) 3530 return IRQ_NONE; 3531 3532 spin_lock(&dev->lock); 3533 3534 /* handle disconnect, dma, and more */ 3535 handle_stat1_irqs(dev, readl(&dev->regs->irqstat1)); 3536 3537 /* control requests and PIO */ 3538 handle_stat0_irqs(dev, readl(&dev->regs->irqstat0)); 3539 3540 if (dev->quirks & PLX_PCIE) { 3541 /* re-enable interrupt to trigger any possible new interrupt */ 3542 u32 pciirqenb1 = readl(&dev->regs->pciirqenb1); 3543 writel(pciirqenb1 & 0x7FFFFFFF, &dev->regs->pciirqenb1); 3544 writel(pciirqenb1, &dev->regs->pciirqenb1); 3545 } 3546 3547 spin_unlock(&dev->lock); 3548 3549 return IRQ_HANDLED; 3550 } 3551 3552 /*-------------------------------------------------------------------------*/ 3553 3554 static void gadget_release(struct device *_dev) 3555 { 3556 struct net2280 *dev = dev_get_drvdata(_dev); 3557 3558 kfree(dev); 3559 } 3560 3561 /* tear down the binding between this driver and the pci device */ 3562 3563 static void net2280_remove(struct pci_dev *pdev) 3564 { 3565 struct net2280 *dev = pci_get_drvdata(pdev); 3566 3567 usb_del_gadget_udc(&dev->gadget); 3568 3569 BUG_ON(dev->driver); 3570 3571 /* then clean up the resources we allocated during probe() */ 3572 if (dev->requests) { 3573 int i; 3574 for (i = 1; i < 5; i++) { 3575 if (!dev->ep[i].dummy) 3576 continue; 3577 dma_pool_free(dev->requests, dev->ep[i].dummy, 3578 dev->ep[i].td_dma); 3579 } 3580 dma_pool_destroy(dev->requests); 3581 } 3582 if (dev->got_irq) 3583 free_irq(pdev->irq, dev); 3584 if (dev->quirks & PLX_PCIE) 3585 pci_disable_msi(pdev); 3586 if (dev->regs) { 3587 net2280_led_shutdown(dev); 3588 iounmap(dev->regs); 3589 } 3590 if (dev->region) 3591 release_mem_region(pci_resource_start(pdev, 0), 3592 pci_resource_len(pdev, 0)); 3593 if (dev->enabled) 3594 pci_disable_device(pdev); 3595 device_remove_file(&pdev->dev, &dev_attr_registers); 3596 3597 ep_info(dev, "unbind\n"); 3598 } 3599 3600 /* wrap this driver around the specified device, but 3601 * don't respond over USB until a gadget driver binds to us. 3602 */ 3603 3604 static int net2280_probe(struct pci_dev *pdev, const struct pci_device_id *id) 3605 { 3606 struct net2280 *dev; 3607 unsigned long resource, len; 3608 void __iomem *base = NULL; 3609 int retval, i; 3610 3611 /* alloc, and start init */ 3612 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 3613 if (dev == NULL) { 3614 retval = -ENOMEM; 3615 goto done; 3616 } 3617 3618 pci_set_drvdata(pdev, dev); 3619 spin_lock_init(&dev->lock); 3620 dev->quirks = id->driver_data; 3621 dev->pdev = pdev; 3622 dev->gadget.ops = &net2280_ops; 3623 dev->gadget.max_speed = (dev->quirks & PLX_SUPERSPEED) ? 3624 USB_SPEED_SUPER : USB_SPEED_HIGH; 3625 3626 /* the "gadget" abstracts/virtualizes the controller */ 3627 dev->gadget.name = driver_name; 3628 3629 /* now all the pci goodies ... */ 3630 if (pci_enable_device(pdev) < 0) { 3631 retval = -ENODEV; 3632 goto done; 3633 } 3634 dev->enabled = 1; 3635 3636 /* BAR 0 holds all the registers 3637 * BAR 1 is 8051 memory; unused here (note erratum 0103) 3638 * BAR 2 is fifo memory; unused here 3639 */ 3640 resource = pci_resource_start(pdev, 0); 3641 len = pci_resource_len(pdev, 0); 3642 if (!request_mem_region(resource, len, driver_name)) { 3643 ep_dbg(dev, "controller already in use\n"); 3644 retval = -EBUSY; 3645 goto done; 3646 } 3647 dev->region = 1; 3648 3649 /* FIXME provide firmware download interface to put 3650 * 8051 code into the chip, e.g. to turn on PCI PM. 3651 */ 3652 3653 base = ioremap_nocache(resource, len); 3654 if (base == NULL) { 3655 ep_dbg(dev, "can't map memory\n"); 3656 retval = -EFAULT; 3657 goto done; 3658 } 3659 dev->regs = (struct net2280_regs __iomem *) base; 3660 dev->usb = (struct net2280_usb_regs __iomem *) (base + 0x0080); 3661 dev->pci = (struct net2280_pci_regs __iomem *) (base + 0x0100); 3662 dev->dma = (struct net2280_dma_regs __iomem *) (base + 0x0180); 3663 dev->dep = (struct net2280_dep_regs __iomem *) (base + 0x0200); 3664 dev->epregs = (struct net2280_ep_regs __iomem *) (base + 0x0300); 3665 3666 if (dev->quirks & PLX_PCIE) { 3667 u32 fsmvalue; 3668 u32 usbstat; 3669 dev->usb_ext = (struct usb338x_usb_ext_regs __iomem *) 3670 (base + 0x00b4); 3671 dev->llregs = (struct usb338x_ll_regs __iomem *) 3672 (base + 0x0700); 3673 dev->ll_lfps_regs = (struct usb338x_ll_lfps_regs __iomem *) 3674 (base + 0x0748); 3675 dev->ll_tsn_regs = (struct usb338x_ll_tsn_regs __iomem *) 3676 (base + 0x077c); 3677 dev->ll_chicken_reg = (struct usb338x_ll_chi_regs __iomem *) 3678 (base + 0x079c); 3679 dev->plregs = (struct usb338x_pl_regs __iomem *) 3680 (base + 0x0800); 3681 usbstat = readl(&dev->usb->usbstat); 3682 dev->enhanced_mode = !!(usbstat & BIT(11)); 3683 dev->n_ep = (dev->enhanced_mode) ? 9 : 5; 3684 /* put into initial config, link up all endpoints */ 3685 fsmvalue = get_idx_reg(dev->regs, SCRATCH) & 3686 (0xf << DEFECT7374_FSM_FIELD); 3687 /* See if firmware needs to set up for workaround: */ 3688 if (fsmvalue == DEFECT7374_FSM_SS_CONTROL_READ) { 3689 dev->bug7734_patched = 1; 3690 writel(0, &dev->usb->usbctl); 3691 } else 3692 dev->bug7734_patched = 0; 3693 } else { 3694 dev->enhanced_mode = 0; 3695 dev->n_ep = 7; 3696 /* put into initial config, link up all endpoints */ 3697 writel(0, &dev->usb->usbctl); 3698 } 3699 3700 usb_reset(dev); 3701 usb_reinit(dev); 3702 3703 /* irq setup after old hardware is cleaned up */ 3704 if (!pdev->irq) { 3705 ep_err(dev, "No IRQ. Check PCI setup!\n"); 3706 retval = -ENODEV; 3707 goto done; 3708 } 3709 3710 if (dev->quirks & PLX_PCIE) 3711 if (pci_enable_msi(pdev)) 3712 ep_err(dev, "Failed to enable MSI mode\n"); 3713 3714 if (request_irq(pdev->irq, net2280_irq, IRQF_SHARED, 3715 driver_name, dev)) { 3716 ep_err(dev, "request interrupt %d failed\n", pdev->irq); 3717 retval = -EBUSY; 3718 goto done; 3719 } 3720 dev->got_irq = 1; 3721 3722 /* DMA setup */ 3723 /* NOTE: we know only the 32 LSBs of dma addresses may be nonzero */ 3724 dev->requests = dma_pool_create("requests", &pdev->dev, 3725 sizeof(struct net2280_dma), 3726 0 /* no alignment requirements */, 3727 0 /* or page-crossing issues */); 3728 if (!dev->requests) { 3729 ep_dbg(dev, "can't get request pool\n"); 3730 retval = -ENOMEM; 3731 goto done; 3732 } 3733 for (i = 1; i < 5; i++) { 3734 struct net2280_dma *td; 3735 3736 td = dma_pool_alloc(dev->requests, GFP_KERNEL, 3737 &dev->ep[i].td_dma); 3738 if (!td) { 3739 ep_dbg(dev, "can't get dummy %d\n", i); 3740 retval = -ENOMEM; 3741 goto done; 3742 } 3743 td->dmacount = 0; /* not VALID */ 3744 td->dmadesc = td->dmaaddr; 3745 dev->ep[i].dummy = td; 3746 } 3747 3748 /* enable lower-overhead pci memory bursts during DMA */ 3749 if (dev->quirks & PLX_LEGACY) 3750 writel(BIT(DMA_MEMORY_WRITE_AND_INVALIDATE_ENABLE) | 3751 /* 3752 * 256 write retries may not be enough... 3753 BIT(PCI_RETRY_ABORT_ENABLE) | 3754 */ 3755 BIT(DMA_READ_MULTIPLE_ENABLE) | 3756 BIT(DMA_READ_LINE_ENABLE), 3757 &dev->pci->pcimstctl); 3758 /* erratum 0115 shouldn't appear: Linux inits PCI_LATENCY_TIMER */ 3759 pci_set_master(pdev); 3760 pci_try_set_mwi(pdev); 3761 3762 /* ... also flushes any posted pci writes */ 3763 dev->chiprev = get_idx_reg(dev->regs, REG_CHIPREV) & 0xffff; 3764 3765 /* done */ 3766 ep_info(dev, "%s\n", driver_desc); 3767 ep_info(dev, "irq %d, pci mem %p, chip rev %04x\n", 3768 pdev->irq, base, dev->chiprev); 3769 ep_info(dev, "version: " DRIVER_VERSION "; %s\n", 3770 dev->enhanced_mode ? "enhanced mode" : "legacy mode"); 3771 retval = device_create_file(&pdev->dev, &dev_attr_registers); 3772 if (retval) 3773 goto done; 3774 3775 retval = usb_add_gadget_udc_release(&pdev->dev, &dev->gadget, 3776 gadget_release); 3777 if (retval) 3778 goto done; 3779 return 0; 3780 3781 done: 3782 if (dev) 3783 net2280_remove(pdev); 3784 return retval; 3785 } 3786 3787 /* make sure the board is quiescent; otherwise it will continue 3788 * generating IRQs across the upcoming reboot. 3789 */ 3790 3791 static void net2280_shutdown(struct pci_dev *pdev) 3792 { 3793 struct net2280 *dev = pci_get_drvdata(pdev); 3794 3795 /* disable IRQs */ 3796 writel(0, &dev->regs->pciirqenb0); 3797 writel(0, &dev->regs->pciirqenb1); 3798 3799 /* disable the pullup so the host will think we're gone */ 3800 writel(0, &dev->usb->usbctl); 3801 3802 } 3803 3804 3805 /*-------------------------------------------------------------------------*/ 3806 3807 static const struct pci_device_id pci_ids[] = { { 3808 .class = PCI_CLASS_SERIAL_USB_DEVICE, 3809 .class_mask = ~0, 3810 .vendor = PCI_VENDOR_ID_PLX_LEGACY, 3811 .device = 0x2280, 3812 .subvendor = PCI_ANY_ID, 3813 .subdevice = PCI_ANY_ID, 3814 .driver_data = PLX_LEGACY | PLX_2280, 3815 }, { 3816 .class = PCI_CLASS_SERIAL_USB_DEVICE, 3817 .class_mask = ~0, 3818 .vendor = PCI_VENDOR_ID_PLX_LEGACY, 3819 .device = 0x2282, 3820 .subvendor = PCI_ANY_ID, 3821 .subdevice = PCI_ANY_ID, 3822 .driver_data = PLX_LEGACY, 3823 }, 3824 { 3825 .class = PCI_CLASS_SERIAL_USB_DEVICE, 3826 .class_mask = ~0, 3827 .vendor = PCI_VENDOR_ID_PLX, 3828 .device = 0x2380, 3829 .subvendor = PCI_ANY_ID, 3830 .subdevice = PCI_ANY_ID, 3831 .driver_data = PLX_PCIE, 3832 }, 3833 { 3834 .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), 3835 .class_mask = ~0, 3836 .vendor = PCI_VENDOR_ID_PLX, 3837 .device = 0x3380, 3838 .subvendor = PCI_ANY_ID, 3839 .subdevice = PCI_ANY_ID, 3840 .driver_data = PLX_PCIE | PLX_SUPERSPEED, 3841 }, 3842 { 3843 .class = PCI_CLASS_SERIAL_USB_DEVICE, 3844 .class_mask = ~0, 3845 .vendor = PCI_VENDOR_ID_PLX, 3846 .device = 0x3382, 3847 .subvendor = PCI_ANY_ID, 3848 .subdevice = PCI_ANY_ID, 3849 .driver_data = PLX_PCIE | PLX_SUPERSPEED, 3850 }, 3851 { /* end: all zeroes */ } 3852 }; 3853 MODULE_DEVICE_TABLE(pci, pci_ids); 3854 3855 /* pci driver glue; this is a "new style" PCI driver module */ 3856 static struct pci_driver net2280_pci_driver = { 3857 .name = (char *) driver_name, 3858 .id_table = pci_ids, 3859 3860 .probe = net2280_probe, 3861 .remove = net2280_remove, 3862 .shutdown = net2280_shutdown, 3863 3864 /* FIXME add power management support */ 3865 }; 3866 3867 module_pci_driver(net2280_pci_driver); 3868 3869 MODULE_DESCRIPTION(DRIVER_DESC); 3870 MODULE_AUTHOR("David Brownell"); 3871 MODULE_LICENSE("GPL"); 3872