1 /* 2 * Driver for the PLX NET2280 USB device controller. 3 * Specs and errata are available from <http://www.plxtech.com>. 4 * 5 * PLX Technology Inc. (formerly NetChip Technology) supported the 6 * development of this driver. 7 * 8 * 9 * CODE STATUS HIGHLIGHTS 10 * 11 * This driver should work well with most "gadget" drivers, including 12 * the Mass Storage, Serial, and Ethernet/RNDIS gadget drivers 13 * as well as Gadget Zero and Gadgetfs. 14 * 15 * DMA is enabled by default. 16 * 17 * MSI is enabled by default. The legacy IRQ is used if MSI couldn't 18 * be enabled. 19 * 20 * Note that almost all the errata workarounds here are only needed for 21 * rev1 chips. Rev1a silicon (0110) fixes almost all of them. 22 */ 23 24 /* 25 * Copyright (C) 2003 David Brownell 26 * Copyright (C) 2003-2005 PLX Technology, Inc. 27 * Copyright (C) 2014 Ricardo Ribalda - Qtechnology/AS 28 * 29 * Modified Seth Levy 2005 PLX Technology, Inc. to provide compatibility 30 * with 2282 chip 31 * 32 * Modified Ricardo Ribalda Qtechnology AS to provide compatibility 33 * with usb 338x chip. Based on PLX driver 34 * 35 * This program is free software; you can redistribute it and/or modify 36 * it under the terms of the GNU General Public License as published by 37 * the Free Software Foundation; either version 2 of the License, or 38 * (at your option) any later version. 39 */ 40 41 #include <linux/module.h> 42 #include <linux/pci.h> 43 #include <linux/dma-mapping.h> 44 #include <linux/kernel.h> 45 #include <linux/delay.h> 46 #include <linux/ioport.h> 47 #include <linux/slab.h> 48 #include <linux/errno.h> 49 #include <linux/init.h> 50 #include <linux/timer.h> 51 #include <linux/list.h> 52 #include <linux/interrupt.h> 53 #include <linux/moduleparam.h> 54 #include <linux/device.h> 55 #include <linux/usb/ch9.h> 56 #include <linux/usb/gadget.h> 57 #include <linux/prefetch.h> 58 #include <linux/io.h> 59 60 #include <asm/byteorder.h> 61 #include <asm/irq.h> 62 #include <asm/unaligned.h> 63 64 #define DRIVER_DESC "PLX NET228x/USB338x USB Peripheral Controller" 65 #define DRIVER_VERSION "2005 Sept 27/v3.0" 66 67 #define EP_DONTUSE 13 /* nonzero */ 68 69 #define USE_RDK_LEDS /* GPIO pins control three LEDs */ 70 71 72 static const char driver_name[] = "net2280"; 73 static const char driver_desc[] = DRIVER_DESC; 74 75 static const u32 ep_bit[9] = { 0, 17, 2, 19, 4, 1, 18, 3, 20 }; 76 static const char ep0name[] = "ep0"; 77 78 #define EP_INFO(_name, _caps) \ 79 { \ 80 .name = _name, \ 81 .caps = _caps, \ 82 } 83 84 static const struct { 85 const char *name; 86 const struct usb_ep_caps caps; 87 } ep_info_dft[] = { /* Default endpoint configuration */ 88 EP_INFO(ep0name, 89 USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL, USB_EP_CAPS_DIR_ALL)), 90 EP_INFO("ep-a", 91 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)), 92 EP_INFO("ep-b", 93 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)), 94 EP_INFO("ep-c", 95 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)), 96 EP_INFO("ep-d", 97 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)), 98 EP_INFO("ep-e", 99 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)), 100 EP_INFO("ep-f", 101 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)), 102 EP_INFO("ep-g", 103 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)), 104 EP_INFO("ep-h", 105 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)), 106 }, ep_info_adv[] = { /* Endpoints for usb3380 advance mode */ 107 EP_INFO(ep0name, 108 USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL, USB_EP_CAPS_DIR_ALL)), 109 EP_INFO("ep1in", 110 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)), 111 EP_INFO("ep2out", 112 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)), 113 EP_INFO("ep3in", 114 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)), 115 EP_INFO("ep4out", 116 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)), 117 EP_INFO("ep1out", 118 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)), 119 EP_INFO("ep2in", 120 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)), 121 EP_INFO("ep3out", 122 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)), 123 EP_INFO("ep4in", 124 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)), 125 }; 126 127 #undef EP_INFO 128 129 /* mode 0 == ep-{a,b,c,d} 1K fifo each 130 * mode 1 == ep-{a,b} 2K fifo each, ep-{c,d} unavailable 131 * mode 2 == ep-a 2K fifo, ep-{b,c} 1K each, ep-d unavailable 132 */ 133 static ushort fifo_mode; 134 135 /* "modprobe net2280 fifo_mode=1" etc */ 136 module_param(fifo_mode, ushort, 0644); 137 138 /* enable_suspend -- When enabled, the driver will respond to 139 * USB suspend requests by powering down the NET2280. Otherwise, 140 * USB suspend requests will be ignored. This is acceptable for 141 * self-powered devices 142 */ 143 static bool enable_suspend; 144 145 /* "modprobe net2280 enable_suspend=1" etc */ 146 module_param(enable_suspend, bool, 0444); 147 148 #define DIR_STRING(bAddress) (((bAddress) & USB_DIR_IN) ? "in" : "out") 149 150 static char *type_string(u8 bmAttributes) 151 { 152 switch ((bmAttributes) & USB_ENDPOINT_XFERTYPE_MASK) { 153 case USB_ENDPOINT_XFER_BULK: return "bulk"; 154 case USB_ENDPOINT_XFER_ISOC: return "iso"; 155 case USB_ENDPOINT_XFER_INT: return "intr"; 156 } 157 return "control"; 158 } 159 160 #include "net2280.h" 161 162 #define valid_bit cpu_to_le32(BIT(VALID_BIT)) 163 #define dma_done_ie cpu_to_le32(BIT(DMA_DONE_INTERRUPT_ENABLE)) 164 165 static void ep_clear_seqnum(struct net2280_ep *ep); 166 static void stop_activity(struct net2280 *dev, 167 struct usb_gadget_driver *driver); 168 static void ep0_start(struct net2280 *dev); 169 170 /*-------------------------------------------------------------------------*/ 171 static inline void enable_pciirqenb(struct net2280_ep *ep) 172 { 173 u32 tmp = readl(&ep->dev->regs->pciirqenb0); 174 175 if (ep->dev->quirks & PLX_LEGACY) 176 tmp |= BIT(ep->num); 177 else 178 tmp |= BIT(ep_bit[ep->num]); 179 writel(tmp, &ep->dev->regs->pciirqenb0); 180 181 return; 182 } 183 184 static int 185 net2280_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) 186 { 187 struct net2280 *dev; 188 struct net2280_ep *ep; 189 u32 max; 190 u32 tmp = 0; 191 u32 type; 192 unsigned long flags; 193 static const u32 ep_key[9] = { 1, 0, 1, 0, 1, 1, 0, 1, 0 }; 194 int ret = 0; 195 196 ep = container_of(_ep, struct net2280_ep, ep); 197 if (!_ep || !desc || ep->desc || _ep->name == ep0name || 198 desc->bDescriptorType != USB_DT_ENDPOINT) { 199 pr_err("%s: failed at line=%d\n", __func__, __LINE__); 200 return -EINVAL; 201 } 202 dev = ep->dev; 203 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) { 204 ret = -ESHUTDOWN; 205 goto print_err; 206 } 207 208 /* erratum 0119 workaround ties up an endpoint number */ 209 if ((desc->bEndpointAddress & 0x0f) == EP_DONTUSE) { 210 ret = -EDOM; 211 goto print_err; 212 } 213 214 if (dev->quirks & PLX_SUPERSPEED) { 215 if ((desc->bEndpointAddress & 0x0f) >= 0x0c) { 216 ret = -EDOM; 217 goto print_err; 218 } 219 ep->is_in = !!usb_endpoint_dir_in(desc); 220 if (dev->enhanced_mode && ep->is_in && ep_key[ep->num]) { 221 ret = -EINVAL; 222 goto print_err; 223 } 224 } 225 226 /* sanity check ep-e/ep-f since their fifos are small */ 227 max = usb_endpoint_maxp(desc) & 0x1fff; 228 if (ep->num > 4 && max > 64 && (dev->quirks & PLX_LEGACY)) { 229 ret = -ERANGE; 230 goto print_err; 231 } 232 233 spin_lock_irqsave(&dev->lock, flags); 234 _ep->maxpacket = max & 0x7ff; 235 ep->desc = desc; 236 237 /* ep_reset() has already been called */ 238 ep->stopped = 0; 239 ep->wedged = 0; 240 ep->out_overflow = 0; 241 242 /* set speed-dependent max packet; may kick in high bandwidth */ 243 set_max_speed(ep, max); 244 245 /* set type, direction, address; reset fifo counters */ 246 writel(BIT(FIFO_FLUSH), &ep->regs->ep_stat); 247 248 if ((dev->quirks & PLX_SUPERSPEED) && dev->enhanced_mode) { 249 tmp = readl(&ep->cfg->ep_cfg); 250 /* If USB ep number doesn't match hardware ep number */ 251 if ((tmp & 0xf) != usb_endpoint_num(desc)) { 252 ret = -EINVAL; 253 spin_unlock_irqrestore(&dev->lock, flags); 254 goto print_err; 255 } 256 if (ep->is_in) 257 tmp &= ~USB3380_EP_CFG_MASK_IN; 258 else 259 tmp &= ~USB3380_EP_CFG_MASK_OUT; 260 } 261 type = (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK); 262 if (type == USB_ENDPOINT_XFER_INT) { 263 /* erratum 0105 workaround prevents hs NYET */ 264 if (dev->chiprev == 0100 && 265 dev->gadget.speed == USB_SPEED_HIGH && 266 !(desc->bEndpointAddress & USB_DIR_IN)) 267 writel(BIT(CLEAR_NAK_OUT_PACKETS_MODE), 268 &ep->regs->ep_rsp); 269 } else if (type == USB_ENDPOINT_XFER_BULK) { 270 /* catch some particularly blatant driver bugs */ 271 if ((dev->gadget.speed == USB_SPEED_SUPER && max != 1024) || 272 (dev->gadget.speed == USB_SPEED_HIGH && max != 512) || 273 (dev->gadget.speed == USB_SPEED_FULL && max > 64)) { 274 spin_unlock_irqrestore(&dev->lock, flags); 275 ret = -ERANGE; 276 goto print_err; 277 } 278 } 279 ep->is_iso = (type == USB_ENDPOINT_XFER_ISOC); 280 /* Enable this endpoint */ 281 if (dev->quirks & PLX_LEGACY) { 282 tmp |= type << ENDPOINT_TYPE; 283 tmp |= desc->bEndpointAddress; 284 /* default full fifo lines */ 285 tmp |= (4 << ENDPOINT_BYTE_COUNT); 286 tmp |= BIT(ENDPOINT_ENABLE); 287 ep->is_in = (tmp & USB_DIR_IN) != 0; 288 } else { 289 /* In Legacy mode, only OUT endpoints are used */ 290 if (dev->enhanced_mode && ep->is_in) { 291 tmp |= type << IN_ENDPOINT_TYPE; 292 tmp |= BIT(IN_ENDPOINT_ENABLE); 293 } else { 294 tmp |= type << OUT_ENDPOINT_TYPE; 295 tmp |= BIT(OUT_ENDPOINT_ENABLE); 296 tmp |= (ep->is_in << ENDPOINT_DIRECTION); 297 } 298 299 tmp |= (4 << ENDPOINT_BYTE_COUNT); 300 if (!dev->enhanced_mode) 301 tmp |= usb_endpoint_num(desc); 302 tmp |= (ep->ep.maxburst << MAX_BURST_SIZE); 303 } 304 305 /* Make sure all the registers are written before ep_rsp*/ 306 wmb(); 307 308 /* for OUT transfers, block the rx fifo until a read is posted */ 309 if (!ep->is_in) 310 writel(BIT(SET_NAK_OUT_PACKETS), &ep->regs->ep_rsp); 311 else if (!(dev->quirks & PLX_2280)) { 312 /* Added for 2282, Don't use nak packets on an in endpoint, 313 * this was ignored on 2280 314 */ 315 writel(BIT(CLEAR_NAK_OUT_PACKETS) | 316 BIT(CLEAR_NAK_OUT_PACKETS_MODE), &ep->regs->ep_rsp); 317 } 318 319 if (dev->quirks & PLX_SUPERSPEED) 320 ep_clear_seqnum(ep); 321 writel(tmp, &ep->cfg->ep_cfg); 322 323 /* enable irqs */ 324 if (!ep->dma) { /* pio, per-packet */ 325 enable_pciirqenb(ep); 326 327 tmp = BIT(DATA_PACKET_RECEIVED_INTERRUPT_ENABLE) | 328 BIT(DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE); 329 if (dev->quirks & PLX_2280) 330 tmp |= readl(&ep->regs->ep_irqenb); 331 writel(tmp, &ep->regs->ep_irqenb); 332 } else { /* dma, per-request */ 333 tmp = BIT((8 + ep->num)); /* completion */ 334 tmp |= readl(&dev->regs->pciirqenb1); 335 writel(tmp, &dev->regs->pciirqenb1); 336 337 /* for short OUT transfers, dma completions can't 338 * advance the queue; do it pio-style, by hand. 339 * NOTE erratum 0112 workaround #2 340 */ 341 if ((desc->bEndpointAddress & USB_DIR_IN) == 0) { 342 tmp = BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT_ENABLE); 343 writel(tmp, &ep->regs->ep_irqenb); 344 345 enable_pciirqenb(ep); 346 } 347 } 348 349 tmp = desc->bEndpointAddress; 350 ep_dbg(dev, "enabled %s (ep%d%s-%s) %s max %04x\n", 351 _ep->name, tmp & 0x0f, DIR_STRING(tmp), 352 type_string(desc->bmAttributes), 353 ep->dma ? "dma" : "pio", max); 354 355 /* pci writes may still be posted */ 356 spin_unlock_irqrestore(&dev->lock, flags); 357 return ret; 358 359 print_err: 360 dev_err(&ep->dev->pdev->dev, "%s: error=%d\n", __func__, ret); 361 return ret; 362 } 363 364 static int handshake(u32 __iomem *ptr, u32 mask, u32 done, int usec) 365 { 366 u32 result; 367 368 do { 369 result = readl(ptr); 370 if (result == ~(u32)0) /* "device unplugged" */ 371 return -ENODEV; 372 result &= mask; 373 if (result == done) 374 return 0; 375 udelay(1); 376 usec--; 377 } while (usec > 0); 378 return -ETIMEDOUT; 379 } 380 381 static const struct usb_ep_ops net2280_ep_ops; 382 383 static void ep_reset_228x(struct net2280_regs __iomem *regs, 384 struct net2280_ep *ep) 385 { 386 u32 tmp; 387 388 ep->desc = NULL; 389 INIT_LIST_HEAD(&ep->queue); 390 391 usb_ep_set_maxpacket_limit(&ep->ep, ~0); 392 ep->ep.ops = &net2280_ep_ops; 393 394 /* disable the dma, irqs, endpoint... */ 395 if (ep->dma) { 396 writel(0, &ep->dma->dmactl); 397 writel(BIT(DMA_SCATTER_GATHER_DONE_INTERRUPT) | 398 BIT(DMA_TRANSACTION_DONE_INTERRUPT) | 399 BIT(DMA_ABORT), 400 &ep->dma->dmastat); 401 402 tmp = readl(®s->pciirqenb0); 403 tmp &= ~BIT(ep->num); 404 writel(tmp, ®s->pciirqenb0); 405 } else { 406 tmp = readl(®s->pciirqenb1); 407 tmp &= ~BIT((8 + ep->num)); /* completion */ 408 writel(tmp, ®s->pciirqenb1); 409 } 410 writel(0, &ep->regs->ep_irqenb); 411 412 /* init to our chosen defaults, notably so that we NAK OUT 413 * packets until the driver queues a read (+note erratum 0112) 414 */ 415 if (!ep->is_in || (ep->dev->quirks & PLX_2280)) { 416 tmp = BIT(SET_NAK_OUT_PACKETS_MODE) | 417 BIT(SET_NAK_OUT_PACKETS) | 418 BIT(CLEAR_EP_HIDE_STATUS_PHASE) | 419 BIT(CLEAR_INTERRUPT_MODE); 420 } else { 421 /* added for 2282 */ 422 tmp = BIT(CLEAR_NAK_OUT_PACKETS_MODE) | 423 BIT(CLEAR_NAK_OUT_PACKETS) | 424 BIT(CLEAR_EP_HIDE_STATUS_PHASE) | 425 BIT(CLEAR_INTERRUPT_MODE); 426 } 427 428 if (ep->num != 0) { 429 tmp |= BIT(CLEAR_ENDPOINT_TOGGLE) | 430 BIT(CLEAR_ENDPOINT_HALT); 431 } 432 writel(tmp, &ep->regs->ep_rsp); 433 434 /* scrub most status bits, and flush any fifo state */ 435 if (ep->dev->quirks & PLX_2280) 436 tmp = BIT(FIFO_OVERFLOW) | 437 BIT(FIFO_UNDERFLOW); 438 else 439 tmp = 0; 440 441 writel(tmp | BIT(TIMEOUT) | 442 BIT(USB_STALL_SENT) | 443 BIT(USB_IN_NAK_SENT) | 444 BIT(USB_IN_ACK_RCVD) | 445 BIT(USB_OUT_PING_NAK_SENT) | 446 BIT(USB_OUT_ACK_SENT) | 447 BIT(FIFO_FLUSH) | 448 BIT(SHORT_PACKET_OUT_DONE_INTERRUPT) | 449 BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT) | 450 BIT(DATA_PACKET_RECEIVED_INTERRUPT) | 451 BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) | 452 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | 453 BIT(DATA_IN_TOKEN_INTERRUPT), 454 &ep->regs->ep_stat); 455 456 /* fifo size is handled separately */ 457 } 458 459 static void ep_reset_338x(struct net2280_regs __iomem *regs, 460 struct net2280_ep *ep) 461 { 462 u32 tmp, dmastat; 463 464 ep->desc = NULL; 465 INIT_LIST_HEAD(&ep->queue); 466 467 usb_ep_set_maxpacket_limit(&ep->ep, ~0); 468 ep->ep.ops = &net2280_ep_ops; 469 470 /* disable the dma, irqs, endpoint... */ 471 if (ep->dma) { 472 writel(0, &ep->dma->dmactl); 473 writel(BIT(DMA_ABORT_DONE_INTERRUPT) | 474 BIT(DMA_PAUSE_DONE_INTERRUPT) | 475 BIT(DMA_SCATTER_GATHER_DONE_INTERRUPT) | 476 BIT(DMA_TRANSACTION_DONE_INTERRUPT), 477 /* | BIT(DMA_ABORT), */ 478 &ep->dma->dmastat); 479 480 dmastat = readl(&ep->dma->dmastat); 481 if (dmastat == 0x5002) { 482 ep_warn(ep->dev, "The dmastat return = %x!!\n", 483 dmastat); 484 writel(0x5a, &ep->dma->dmastat); 485 } 486 487 tmp = readl(®s->pciirqenb0); 488 tmp &= ~BIT(ep_bit[ep->num]); 489 writel(tmp, ®s->pciirqenb0); 490 } else { 491 if (ep->num < 5) { 492 tmp = readl(®s->pciirqenb1); 493 tmp &= ~BIT((8 + ep->num)); /* completion */ 494 writel(tmp, ®s->pciirqenb1); 495 } 496 } 497 writel(0, &ep->regs->ep_irqenb); 498 499 writel(BIT(SHORT_PACKET_OUT_DONE_INTERRUPT) | 500 BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT) | 501 BIT(FIFO_OVERFLOW) | 502 BIT(DATA_PACKET_RECEIVED_INTERRUPT) | 503 BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) | 504 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | 505 BIT(DATA_IN_TOKEN_INTERRUPT), &ep->regs->ep_stat); 506 507 tmp = readl(&ep->cfg->ep_cfg); 508 if (ep->is_in) 509 tmp &= ~USB3380_EP_CFG_MASK_IN; 510 else 511 tmp &= ~USB3380_EP_CFG_MASK_OUT; 512 writel(tmp, &ep->cfg->ep_cfg); 513 } 514 515 static void nuke(struct net2280_ep *); 516 517 static int net2280_disable(struct usb_ep *_ep) 518 { 519 struct net2280_ep *ep; 520 unsigned long flags; 521 522 ep = container_of(_ep, struct net2280_ep, ep); 523 if (!_ep || !ep->desc || _ep->name == ep0name) { 524 pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep); 525 return -EINVAL; 526 } 527 spin_lock_irqsave(&ep->dev->lock, flags); 528 nuke(ep); 529 530 if (ep->dev->quirks & PLX_SUPERSPEED) 531 ep_reset_338x(ep->dev->regs, ep); 532 else 533 ep_reset_228x(ep->dev->regs, ep); 534 535 ep_vdbg(ep->dev, "disabled %s %s\n", 536 ep->dma ? "dma" : "pio", _ep->name); 537 538 /* synch memory views with the device */ 539 (void)readl(&ep->cfg->ep_cfg); 540 541 if (!ep->dma && ep->num >= 1 && ep->num <= 4) 542 ep->dma = &ep->dev->dma[ep->num - 1]; 543 544 spin_unlock_irqrestore(&ep->dev->lock, flags); 545 return 0; 546 } 547 548 /*-------------------------------------------------------------------------*/ 549 550 static struct usb_request 551 *net2280_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) 552 { 553 struct net2280_ep *ep; 554 struct net2280_request *req; 555 556 if (!_ep) { 557 pr_err("%s: Invalid ep\n", __func__); 558 return NULL; 559 } 560 ep = container_of(_ep, struct net2280_ep, ep); 561 562 req = kzalloc(sizeof(*req), gfp_flags); 563 if (!req) 564 return NULL; 565 566 INIT_LIST_HEAD(&req->queue); 567 568 /* this dma descriptor may be swapped with the previous dummy */ 569 if (ep->dma) { 570 struct net2280_dma *td; 571 572 td = pci_pool_alloc(ep->dev->requests, gfp_flags, 573 &req->td_dma); 574 if (!td) { 575 kfree(req); 576 return NULL; 577 } 578 td->dmacount = 0; /* not VALID */ 579 td->dmadesc = td->dmaaddr; 580 req->td = td; 581 } 582 return &req->req; 583 } 584 585 static void net2280_free_request(struct usb_ep *_ep, struct usb_request *_req) 586 { 587 struct net2280_ep *ep; 588 struct net2280_request *req; 589 590 ep = container_of(_ep, struct net2280_ep, ep); 591 if (!_ep || !_req) { 592 dev_err(&ep->dev->pdev->dev, "%s: Inavlid ep=%p or req=%p\n", 593 __func__, _ep, _req); 594 return; 595 } 596 597 req = container_of(_req, struct net2280_request, req); 598 WARN_ON(!list_empty(&req->queue)); 599 if (req->td) 600 pci_pool_free(ep->dev->requests, req->td, req->td_dma); 601 kfree(req); 602 } 603 604 /*-------------------------------------------------------------------------*/ 605 606 /* load a packet into the fifo we use for usb IN transfers. 607 * works for all endpoints. 608 * 609 * NOTE: pio with ep-a..ep-d could stuff multiple packets into the fifo 610 * at a time, but this code is simpler because it knows it only writes 611 * one packet. ep-a..ep-d should use dma instead. 612 */ 613 static void write_fifo(struct net2280_ep *ep, struct usb_request *req) 614 { 615 struct net2280_ep_regs __iomem *regs = ep->regs; 616 u8 *buf; 617 u32 tmp; 618 unsigned count, total; 619 620 /* INVARIANT: fifo is currently empty. (testable) */ 621 622 if (req) { 623 buf = req->buf + req->actual; 624 prefetch(buf); 625 total = req->length - req->actual; 626 } else { 627 total = 0; 628 buf = NULL; 629 } 630 631 /* write just one packet at a time */ 632 count = ep->ep.maxpacket; 633 if (count > total) /* min() cannot be used on a bitfield */ 634 count = total; 635 636 ep_vdbg(ep->dev, "write %s fifo (IN) %d bytes%s req %p\n", 637 ep->ep.name, count, 638 (count != ep->ep.maxpacket) ? " (short)" : "", 639 req); 640 while (count >= 4) { 641 /* NOTE be careful if you try to align these. fifo lines 642 * should normally be full (4 bytes) and successive partial 643 * lines are ok only in certain cases. 644 */ 645 tmp = get_unaligned((u32 *)buf); 646 cpu_to_le32s(&tmp); 647 writel(tmp, ®s->ep_data); 648 buf += 4; 649 count -= 4; 650 } 651 652 /* last fifo entry is "short" unless we wrote a full packet. 653 * also explicitly validate last word in (periodic) transfers 654 * when maxpacket is not a multiple of 4 bytes. 655 */ 656 if (count || total < ep->ep.maxpacket) { 657 tmp = count ? get_unaligned((u32 *)buf) : count; 658 cpu_to_le32s(&tmp); 659 set_fifo_bytecount(ep, count & 0x03); 660 writel(tmp, ®s->ep_data); 661 } 662 663 /* pci writes may still be posted */ 664 } 665 666 /* work around erratum 0106: PCI and USB race over the OUT fifo. 667 * caller guarantees chiprev 0100, out endpoint is NAKing, and 668 * there's no real data in the fifo. 669 * 670 * NOTE: also used in cases where that erratum doesn't apply: 671 * where the host wrote "too much" data to us. 672 */ 673 static void out_flush(struct net2280_ep *ep) 674 { 675 u32 __iomem *statp; 676 u32 tmp; 677 678 statp = &ep->regs->ep_stat; 679 680 tmp = readl(statp); 681 if (tmp & BIT(NAK_OUT_PACKETS)) { 682 ep_dbg(ep->dev, "%s %s %08x !NAK\n", 683 ep->ep.name, __func__, tmp); 684 writel(BIT(SET_NAK_OUT_PACKETS), &ep->regs->ep_rsp); 685 } 686 687 writel(BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | 688 BIT(DATA_PACKET_RECEIVED_INTERRUPT), 689 statp); 690 writel(BIT(FIFO_FLUSH), statp); 691 /* Make sure that stap is written */ 692 mb(); 693 tmp = readl(statp); 694 if (tmp & BIT(DATA_OUT_PING_TOKEN_INTERRUPT) && 695 /* high speed did bulk NYET; fifo isn't filling */ 696 ep->dev->gadget.speed == USB_SPEED_FULL) { 697 unsigned usec; 698 699 usec = 50; /* 64 byte bulk/interrupt */ 700 handshake(statp, BIT(USB_OUT_PING_NAK_SENT), 701 BIT(USB_OUT_PING_NAK_SENT), usec); 702 /* NAK done; now CLEAR_NAK_OUT_PACKETS is safe */ 703 } 704 } 705 706 /* unload packet(s) from the fifo we use for usb OUT transfers. 707 * returns true iff the request completed, because of short packet 708 * or the request buffer having filled with full packets. 709 * 710 * for ep-a..ep-d this will read multiple packets out when they 711 * have been accepted. 712 */ 713 static int read_fifo(struct net2280_ep *ep, struct net2280_request *req) 714 { 715 struct net2280_ep_regs __iomem *regs = ep->regs; 716 u8 *buf = req->req.buf + req->req.actual; 717 unsigned count, tmp, is_short; 718 unsigned cleanup = 0, prevent = 0; 719 720 /* erratum 0106 ... packets coming in during fifo reads might 721 * be incompletely rejected. not all cases have workarounds. 722 */ 723 if (ep->dev->chiprev == 0x0100 && 724 ep->dev->gadget.speed == USB_SPEED_FULL) { 725 udelay(1); 726 tmp = readl(&ep->regs->ep_stat); 727 if ((tmp & BIT(NAK_OUT_PACKETS))) 728 cleanup = 1; 729 else if ((tmp & BIT(FIFO_FULL))) { 730 start_out_naking(ep); 731 prevent = 1; 732 } 733 /* else: hope we don't see the problem */ 734 } 735 736 /* never overflow the rx buffer. the fifo reads packets until 737 * it sees a short one; we might not be ready for them all. 738 */ 739 prefetchw(buf); 740 count = readl(®s->ep_avail); 741 if (unlikely(count == 0)) { 742 udelay(1); 743 tmp = readl(&ep->regs->ep_stat); 744 count = readl(®s->ep_avail); 745 /* handled that data already? */ 746 if (count == 0 && (tmp & BIT(NAK_OUT_PACKETS)) == 0) 747 return 0; 748 } 749 750 tmp = req->req.length - req->req.actual; 751 if (count > tmp) { 752 /* as with DMA, data overflow gets flushed */ 753 if ((tmp % ep->ep.maxpacket) != 0) { 754 ep_err(ep->dev, 755 "%s out fifo %d bytes, expected %d\n", 756 ep->ep.name, count, tmp); 757 req->req.status = -EOVERFLOW; 758 cleanup = 1; 759 /* NAK_OUT_PACKETS will be set, so flushing is safe; 760 * the next read will start with the next packet 761 */ 762 } /* else it's a ZLP, no worries */ 763 count = tmp; 764 } 765 req->req.actual += count; 766 767 is_short = (count == 0) || ((count % ep->ep.maxpacket) != 0); 768 769 ep_vdbg(ep->dev, "read %s fifo (OUT) %d bytes%s%s%s req %p %d/%d\n", 770 ep->ep.name, count, is_short ? " (short)" : "", 771 cleanup ? " flush" : "", prevent ? " nak" : "", 772 req, req->req.actual, req->req.length); 773 774 while (count >= 4) { 775 tmp = readl(®s->ep_data); 776 cpu_to_le32s(&tmp); 777 put_unaligned(tmp, (u32 *)buf); 778 buf += 4; 779 count -= 4; 780 } 781 if (count) { 782 tmp = readl(®s->ep_data); 783 /* LE conversion is implicit here: */ 784 do { 785 *buf++ = (u8) tmp; 786 tmp >>= 8; 787 } while (--count); 788 } 789 if (cleanup) 790 out_flush(ep); 791 if (prevent) { 792 writel(BIT(CLEAR_NAK_OUT_PACKETS), &ep->regs->ep_rsp); 793 (void) readl(&ep->regs->ep_rsp); 794 } 795 796 return is_short || ((req->req.actual == req->req.length) && 797 !req->req.zero); 798 } 799 800 /* fill out dma descriptor to match a given request */ 801 static void fill_dma_desc(struct net2280_ep *ep, 802 struct net2280_request *req, int valid) 803 { 804 struct net2280_dma *td = req->td; 805 u32 dmacount = req->req.length; 806 807 /* don't let DMA continue after a short OUT packet, 808 * so overruns can't affect the next transfer. 809 * in case of overruns on max-size packets, we can't 810 * stop the fifo from filling but we can flush it. 811 */ 812 if (ep->is_in) 813 dmacount |= BIT(DMA_DIRECTION); 814 if ((!ep->is_in && (dmacount % ep->ep.maxpacket) != 0) || 815 !(ep->dev->quirks & PLX_2280)) 816 dmacount |= BIT(END_OF_CHAIN); 817 818 req->valid = valid; 819 if (valid) 820 dmacount |= BIT(VALID_BIT); 821 dmacount |= BIT(DMA_DONE_INTERRUPT_ENABLE); 822 823 /* td->dmadesc = previously set by caller */ 824 td->dmaaddr = cpu_to_le32 (req->req.dma); 825 826 /* 2280 may be polling VALID_BIT through ep->dma->dmadesc */ 827 wmb(); 828 td->dmacount = cpu_to_le32(dmacount); 829 } 830 831 static const u32 dmactl_default = 832 BIT(DMA_SCATTER_GATHER_DONE_INTERRUPT) | 833 BIT(DMA_CLEAR_COUNT_ENABLE) | 834 /* erratum 0116 workaround part 1 (use POLLING) */ 835 (POLL_100_USEC << DESCRIPTOR_POLLING_RATE) | 836 BIT(DMA_VALID_BIT_POLLING_ENABLE) | 837 BIT(DMA_VALID_BIT_ENABLE) | 838 BIT(DMA_SCATTER_GATHER_ENABLE) | 839 /* erratum 0116 workaround part 2 (no AUTOSTART) */ 840 BIT(DMA_ENABLE); 841 842 static inline void spin_stop_dma(struct net2280_dma_regs __iomem *dma) 843 { 844 handshake(&dma->dmactl, BIT(DMA_ENABLE), 0, 50); 845 } 846 847 static inline void stop_dma(struct net2280_dma_regs __iomem *dma) 848 { 849 writel(readl(&dma->dmactl) & ~BIT(DMA_ENABLE), &dma->dmactl); 850 spin_stop_dma(dma); 851 } 852 853 static void start_queue(struct net2280_ep *ep, u32 dmactl, u32 td_dma) 854 { 855 struct net2280_dma_regs __iomem *dma = ep->dma; 856 unsigned int tmp = BIT(VALID_BIT) | (ep->is_in << DMA_DIRECTION); 857 858 if (!(ep->dev->quirks & PLX_2280)) 859 tmp |= BIT(END_OF_CHAIN); 860 861 writel(tmp, &dma->dmacount); 862 writel(readl(&dma->dmastat), &dma->dmastat); 863 864 writel(td_dma, &dma->dmadesc); 865 if (ep->dev->quirks & PLX_SUPERSPEED) 866 dmactl |= BIT(DMA_REQUEST_OUTSTANDING); 867 writel(dmactl, &dma->dmactl); 868 869 /* erratum 0116 workaround part 3: pci arbiter away from net2280 */ 870 (void) readl(&ep->dev->pci->pcimstctl); 871 872 writel(BIT(DMA_START), &dma->dmastat); 873 874 if (!ep->is_in) 875 stop_out_naking(ep); 876 } 877 878 static void start_dma(struct net2280_ep *ep, struct net2280_request *req) 879 { 880 u32 tmp; 881 struct net2280_dma_regs __iomem *dma = ep->dma; 882 883 /* FIXME can't use DMA for ZLPs */ 884 885 /* on this path we "know" there's no dma active (yet) */ 886 WARN_ON(readl(&dma->dmactl) & BIT(DMA_ENABLE)); 887 writel(0, &ep->dma->dmactl); 888 889 /* previous OUT packet might have been short */ 890 if (!ep->is_in && (readl(&ep->regs->ep_stat) & 891 BIT(NAK_OUT_PACKETS))) { 892 writel(BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT), 893 &ep->regs->ep_stat); 894 895 tmp = readl(&ep->regs->ep_avail); 896 if (tmp) { 897 writel(readl(&dma->dmastat), &dma->dmastat); 898 899 /* transfer all/some fifo data */ 900 writel(req->req.dma, &dma->dmaaddr); 901 tmp = min(tmp, req->req.length); 902 903 /* dma irq, faking scatterlist status */ 904 req->td->dmacount = cpu_to_le32(req->req.length - tmp); 905 writel(BIT(DMA_DONE_INTERRUPT_ENABLE) | tmp, 906 &dma->dmacount); 907 req->td->dmadesc = 0; 908 req->valid = 1; 909 910 writel(BIT(DMA_ENABLE), &dma->dmactl); 911 writel(BIT(DMA_START), &dma->dmastat); 912 return; 913 } 914 } 915 916 tmp = dmactl_default; 917 918 /* force packet boundaries between dma requests, but prevent the 919 * controller from automagically writing a last "short" packet 920 * (zero length) unless the driver explicitly said to do that. 921 */ 922 if (ep->is_in) { 923 if (likely((req->req.length % ep->ep.maxpacket) || 924 req->req.zero)){ 925 tmp |= BIT(DMA_FIFO_VALIDATE); 926 ep->in_fifo_validate = 1; 927 } else 928 ep->in_fifo_validate = 0; 929 } 930 931 /* init req->td, pointing to the current dummy */ 932 req->td->dmadesc = cpu_to_le32 (ep->td_dma); 933 fill_dma_desc(ep, req, 1); 934 935 req->td->dmacount |= cpu_to_le32(BIT(END_OF_CHAIN)); 936 937 start_queue(ep, tmp, req->td_dma); 938 } 939 940 static inline void 941 queue_dma(struct net2280_ep *ep, struct net2280_request *req, int valid) 942 { 943 struct net2280_dma *end; 944 dma_addr_t tmp; 945 946 /* swap new dummy for old, link; fill and maybe activate */ 947 end = ep->dummy; 948 ep->dummy = req->td; 949 req->td = end; 950 951 tmp = ep->td_dma; 952 ep->td_dma = req->td_dma; 953 req->td_dma = tmp; 954 955 end->dmadesc = cpu_to_le32 (ep->td_dma); 956 957 fill_dma_desc(ep, req, valid); 958 } 959 960 static void 961 done(struct net2280_ep *ep, struct net2280_request *req, int status) 962 { 963 struct net2280 *dev; 964 unsigned stopped = ep->stopped; 965 966 list_del_init(&req->queue); 967 968 if (req->req.status == -EINPROGRESS) 969 req->req.status = status; 970 else 971 status = req->req.status; 972 973 dev = ep->dev; 974 if (ep->dma) 975 usb_gadget_unmap_request(&dev->gadget, &req->req, ep->is_in); 976 977 if (status && status != -ESHUTDOWN) 978 ep_vdbg(dev, "complete %s req %p stat %d len %u/%u\n", 979 ep->ep.name, &req->req, status, 980 req->req.actual, req->req.length); 981 982 /* don't modify queue heads during completion callback */ 983 ep->stopped = 1; 984 spin_unlock(&dev->lock); 985 usb_gadget_giveback_request(&ep->ep, &req->req); 986 spin_lock(&dev->lock); 987 ep->stopped = stopped; 988 } 989 990 /*-------------------------------------------------------------------------*/ 991 992 static int 993 net2280_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) 994 { 995 struct net2280_request *req; 996 struct net2280_ep *ep; 997 struct net2280 *dev; 998 unsigned long flags; 999 int ret = 0; 1000 1001 /* we always require a cpu-view buffer, so that we can 1002 * always use pio (as fallback or whatever). 1003 */ 1004 ep = container_of(_ep, struct net2280_ep, ep); 1005 if (!_ep || (!ep->desc && ep->num != 0)) { 1006 pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep); 1007 return -EINVAL; 1008 } 1009 req = container_of(_req, struct net2280_request, req); 1010 if (!_req || !_req->complete || !_req->buf || 1011 !list_empty(&req->queue)) { 1012 ret = -EINVAL; 1013 goto print_err; 1014 } 1015 if (_req->length > (~0 & DMA_BYTE_COUNT_MASK)) { 1016 ret = -EDOM; 1017 goto print_err; 1018 } 1019 dev = ep->dev; 1020 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) { 1021 ret = -ESHUTDOWN; 1022 goto print_err; 1023 } 1024 1025 /* FIXME implement PIO fallback for ZLPs with DMA */ 1026 if (ep->dma && _req->length == 0) { 1027 ret = -EOPNOTSUPP; 1028 goto print_err; 1029 } 1030 1031 /* set up dma mapping in case the caller didn't */ 1032 if (ep->dma) { 1033 ret = usb_gadget_map_request(&dev->gadget, _req, 1034 ep->is_in); 1035 if (ret) 1036 goto print_err; 1037 } 1038 1039 ep_vdbg(dev, "%s queue req %p, len %d buf %p\n", 1040 _ep->name, _req, _req->length, _req->buf); 1041 1042 spin_lock_irqsave(&dev->lock, flags); 1043 1044 _req->status = -EINPROGRESS; 1045 _req->actual = 0; 1046 1047 /* kickstart this i/o queue? */ 1048 if (list_empty(&ep->queue) && !ep->stopped && 1049 !((dev->quirks & PLX_SUPERSPEED) && ep->dma && 1050 (readl(&ep->regs->ep_rsp) & BIT(CLEAR_ENDPOINT_HALT)))) { 1051 1052 /* use DMA if the endpoint supports it, else pio */ 1053 if (ep->dma) 1054 start_dma(ep, req); 1055 else { 1056 /* maybe there's no control data, just status ack */ 1057 if (ep->num == 0 && _req->length == 0) { 1058 allow_status(ep); 1059 done(ep, req, 0); 1060 ep_vdbg(dev, "%s status ack\n", ep->ep.name); 1061 goto done; 1062 } 1063 1064 /* PIO ... stuff the fifo, or unblock it. */ 1065 if (ep->is_in) 1066 write_fifo(ep, _req); 1067 else if (list_empty(&ep->queue)) { 1068 u32 s; 1069 1070 /* OUT FIFO might have packet(s) buffered */ 1071 s = readl(&ep->regs->ep_stat); 1072 if ((s & BIT(FIFO_EMPTY)) == 0) { 1073 /* note: _req->short_not_ok is 1074 * ignored here since PIO _always_ 1075 * stops queue advance here, and 1076 * _req->status doesn't change for 1077 * short reads (only _req->actual) 1078 */ 1079 if (read_fifo(ep, req) && 1080 ep->num == 0) { 1081 done(ep, req, 0); 1082 allow_status(ep); 1083 /* don't queue it */ 1084 req = NULL; 1085 } else if (read_fifo(ep, req) && 1086 ep->num != 0) { 1087 done(ep, req, 0); 1088 req = NULL; 1089 } else 1090 s = readl(&ep->regs->ep_stat); 1091 } 1092 1093 /* don't NAK, let the fifo fill */ 1094 if (req && (s & BIT(NAK_OUT_PACKETS))) 1095 writel(BIT(CLEAR_NAK_OUT_PACKETS), 1096 &ep->regs->ep_rsp); 1097 } 1098 } 1099 1100 } else if (ep->dma) { 1101 int valid = 1; 1102 1103 if (ep->is_in) { 1104 int expect; 1105 1106 /* preventing magic zlps is per-engine state, not 1107 * per-transfer; irq logic must recover hiccups. 1108 */ 1109 expect = likely(req->req.zero || 1110 (req->req.length % ep->ep.maxpacket)); 1111 if (expect != ep->in_fifo_validate) 1112 valid = 0; 1113 } 1114 queue_dma(ep, req, valid); 1115 1116 } /* else the irq handler advances the queue. */ 1117 1118 ep->responded = 1; 1119 if (req) 1120 list_add_tail(&req->queue, &ep->queue); 1121 done: 1122 spin_unlock_irqrestore(&dev->lock, flags); 1123 1124 /* pci writes may still be posted */ 1125 return ret; 1126 1127 print_err: 1128 dev_err(&ep->dev->pdev->dev, "%s: error=%d\n", __func__, ret); 1129 return ret; 1130 } 1131 1132 static inline void 1133 dma_done(struct net2280_ep *ep, struct net2280_request *req, u32 dmacount, 1134 int status) 1135 { 1136 req->req.actual = req->req.length - (DMA_BYTE_COUNT_MASK & dmacount); 1137 done(ep, req, status); 1138 } 1139 1140 static void scan_dma_completions(struct net2280_ep *ep) 1141 { 1142 /* only look at descriptors that were "naturally" retired, 1143 * so fifo and list head state won't matter 1144 */ 1145 while (!list_empty(&ep->queue)) { 1146 struct net2280_request *req; 1147 u32 tmp; 1148 1149 req = list_entry(ep->queue.next, 1150 struct net2280_request, queue); 1151 if (!req->valid) 1152 break; 1153 rmb(); 1154 tmp = le32_to_cpup(&req->td->dmacount); 1155 if ((tmp & BIT(VALID_BIT)) != 0) 1156 break; 1157 1158 /* SHORT_PACKET_TRANSFERRED_INTERRUPT handles "usb-short" 1159 * cases where DMA must be aborted; this code handles 1160 * all non-abort DMA completions. 1161 */ 1162 if (unlikely(req->td->dmadesc == 0)) { 1163 /* paranoia */ 1164 tmp = readl(&ep->dma->dmacount); 1165 if (tmp & DMA_BYTE_COUNT_MASK) 1166 break; 1167 /* single transfer mode */ 1168 dma_done(ep, req, tmp, 0); 1169 break; 1170 } else if (!ep->is_in && 1171 (req->req.length % ep->ep.maxpacket) && 1172 !(ep->dev->quirks & PLX_SUPERSPEED)) { 1173 1174 tmp = readl(&ep->regs->ep_stat); 1175 /* AVOID TROUBLE HERE by not issuing short reads from 1176 * your gadget driver. That helps avoids errata 0121, 1177 * 0122, and 0124; not all cases trigger the warning. 1178 */ 1179 if ((tmp & BIT(NAK_OUT_PACKETS)) == 0) { 1180 ep_warn(ep->dev, "%s lost packet sync!\n", 1181 ep->ep.name); 1182 req->req.status = -EOVERFLOW; 1183 } else { 1184 tmp = readl(&ep->regs->ep_avail); 1185 if (tmp) { 1186 /* fifo gets flushed later */ 1187 ep->out_overflow = 1; 1188 ep_dbg(ep->dev, 1189 "%s dma, discard %d len %d\n", 1190 ep->ep.name, tmp, 1191 req->req.length); 1192 req->req.status = -EOVERFLOW; 1193 } 1194 } 1195 } 1196 dma_done(ep, req, tmp, 0); 1197 } 1198 } 1199 1200 static void restart_dma(struct net2280_ep *ep) 1201 { 1202 struct net2280_request *req; 1203 1204 if (ep->stopped) 1205 return; 1206 req = list_entry(ep->queue.next, struct net2280_request, queue); 1207 1208 start_dma(ep, req); 1209 } 1210 1211 static void abort_dma(struct net2280_ep *ep) 1212 { 1213 /* abort the current transfer */ 1214 if (likely(!list_empty(&ep->queue))) { 1215 /* FIXME work around errata 0121, 0122, 0124 */ 1216 writel(BIT(DMA_ABORT), &ep->dma->dmastat); 1217 spin_stop_dma(ep->dma); 1218 } else 1219 stop_dma(ep->dma); 1220 scan_dma_completions(ep); 1221 } 1222 1223 /* dequeue ALL requests */ 1224 static void nuke(struct net2280_ep *ep) 1225 { 1226 struct net2280_request *req; 1227 1228 /* called with spinlock held */ 1229 ep->stopped = 1; 1230 if (ep->dma) 1231 abort_dma(ep); 1232 while (!list_empty(&ep->queue)) { 1233 req = list_entry(ep->queue.next, 1234 struct net2280_request, 1235 queue); 1236 done(ep, req, -ESHUTDOWN); 1237 } 1238 } 1239 1240 /* dequeue JUST ONE request */ 1241 static int net2280_dequeue(struct usb_ep *_ep, struct usb_request *_req) 1242 { 1243 struct net2280_ep *ep; 1244 struct net2280_request *req; 1245 unsigned long flags; 1246 u32 dmactl; 1247 int stopped; 1248 1249 ep = container_of(_ep, struct net2280_ep, ep); 1250 if (!_ep || (!ep->desc && ep->num != 0) || !_req) { 1251 pr_err("%s: Invalid ep=%p or ep->desc or req=%p\n", 1252 __func__, _ep, _req); 1253 return -EINVAL; 1254 } 1255 1256 spin_lock_irqsave(&ep->dev->lock, flags); 1257 stopped = ep->stopped; 1258 1259 /* quiesce dma while we patch the queue */ 1260 dmactl = 0; 1261 ep->stopped = 1; 1262 if (ep->dma) { 1263 dmactl = readl(&ep->dma->dmactl); 1264 /* WARNING erratum 0127 may kick in ... */ 1265 stop_dma(ep->dma); 1266 scan_dma_completions(ep); 1267 } 1268 1269 /* make sure it's still queued on this endpoint */ 1270 list_for_each_entry(req, &ep->queue, queue) { 1271 if (&req->req == _req) 1272 break; 1273 } 1274 if (&req->req != _req) { 1275 spin_unlock_irqrestore(&ep->dev->lock, flags); 1276 dev_err(&ep->dev->pdev->dev, "%s: Request mismatch\n", 1277 __func__); 1278 return -EINVAL; 1279 } 1280 1281 /* queue head may be partially complete. */ 1282 if (ep->queue.next == &req->queue) { 1283 if (ep->dma) { 1284 ep_dbg(ep->dev, "unlink (%s) dma\n", _ep->name); 1285 _req->status = -ECONNRESET; 1286 abort_dma(ep); 1287 if (likely(ep->queue.next == &req->queue)) { 1288 /* NOTE: misreports single-transfer mode*/ 1289 req->td->dmacount = 0; /* invalidate */ 1290 dma_done(ep, req, 1291 readl(&ep->dma->dmacount), 1292 -ECONNRESET); 1293 } 1294 } else { 1295 ep_dbg(ep->dev, "unlink (%s) pio\n", _ep->name); 1296 done(ep, req, -ECONNRESET); 1297 } 1298 req = NULL; 1299 } 1300 1301 if (req) 1302 done(ep, req, -ECONNRESET); 1303 ep->stopped = stopped; 1304 1305 if (ep->dma) { 1306 /* turn off dma on inactive queues */ 1307 if (list_empty(&ep->queue)) 1308 stop_dma(ep->dma); 1309 else if (!ep->stopped) { 1310 /* resume current request, or start new one */ 1311 if (req) 1312 writel(dmactl, &ep->dma->dmactl); 1313 else 1314 start_dma(ep, list_entry(ep->queue.next, 1315 struct net2280_request, queue)); 1316 } 1317 } 1318 1319 spin_unlock_irqrestore(&ep->dev->lock, flags); 1320 return 0; 1321 } 1322 1323 /*-------------------------------------------------------------------------*/ 1324 1325 static int net2280_fifo_status(struct usb_ep *_ep); 1326 1327 static int 1328 net2280_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged) 1329 { 1330 struct net2280_ep *ep; 1331 unsigned long flags; 1332 int retval = 0; 1333 1334 ep = container_of(_ep, struct net2280_ep, ep); 1335 if (!_ep || (!ep->desc && ep->num != 0)) { 1336 pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep); 1337 return -EINVAL; 1338 } 1339 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) { 1340 retval = -ESHUTDOWN; 1341 goto print_err; 1342 } 1343 if (ep->desc /* not ep0 */ && (ep->desc->bmAttributes & 0x03) 1344 == USB_ENDPOINT_XFER_ISOC) { 1345 retval = -EINVAL; 1346 goto print_err; 1347 } 1348 1349 spin_lock_irqsave(&ep->dev->lock, flags); 1350 if (!list_empty(&ep->queue)) { 1351 retval = -EAGAIN; 1352 goto print_unlock; 1353 } else if (ep->is_in && value && net2280_fifo_status(_ep) != 0) { 1354 retval = -EAGAIN; 1355 goto print_unlock; 1356 } else { 1357 ep_vdbg(ep->dev, "%s %s %s\n", _ep->name, 1358 value ? "set" : "clear", 1359 wedged ? "wedge" : "halt"); 1360 /* set/clear, then synch memory views with the device */ 1361 if (value) { 1362 if (ep->num == 0) 1363 ep->dev->protocol_stall = 1; 1364 else 1365 set_halt(ep); 1366 if (wedged) 1367 ep->wedged = 1; 1368 } else { 1369 clear_halt(ep); 1370 if (ep->dev->quirks & PLX_SUPERSPEED && 1371 !list_empty(&ep->queue) && ep->td_dma) 1372 restart_dma(ep); 1373 ep->wedged = 0; 1374 } 1375 (void) readl(&ep->regs->ep_rsp); 1376 } 1377 spin_unlock_irqrestore(&ep->dev->lock, flags); 1378 1379 return retval; 1380 1381 print_unlock: 1382 spin_unlock_irqrestore(&ep->dev->lock, flags); 1383 print_err: 1384 dev_err(&ep->dev->pdev->dev, "%s: error=%d\n", __func__, retval); 1385 return retval; 1386 } 1387 1388 static int net2280_set_halt(struct usb_ep *_ep, int value) 1389 { 1390 return net2280_set_halt_and_wedge(_ep, value, 0); 1391 } 1392 1393 static int net2280_set_wedge(struct usb_ep *_ep) 1394 { 1395 if (!_ep || _ep->name == ep0name) { 1396 pr_err("%s: Invalid ep=%p or ep0\n", __func__, _ep); 1397 return -EINVAL; 1398 } 1399 return net2280_set_halt_and_wedge(_ep, 1, 1); 1400 } 1401 1402 static int net2280_fifo_status(struct usb_ep *_ep) 1403 { 1404 struct net2280_ep *ep; 1405 u32 avail; 1406 1407 ep = container_of(_ep, struct net2280_ep, ep); 1408 if (!_ep || (!ep->desc && ep->num != 0)) { 1409 pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep); 1410 return -ENODEV; 1411 } 1412 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) { 1413 dev_err(&ep->dev->pdev->dev, 1414 "%s: Invalid driver=%p or speed=%d\n", 1415 __func__, ep->dev->driver, ep->dev->gadget.speed); 1416 return -ESHUTDOWN; 1417 } 1418 1419 avail = readl(&ep->regs->ep_avail) & (BIT(12) - 1); 1420 if (avail > ep->fifo_size) { 1421 dev_err(&ep->dev->pdev->dev, "%s: Fifo overflow\n", __func__); 1422 return -EOVERFLOW; 1423 } 1424 if (ep->is_in) 1425 avail = ep->fifo_size - avail; 1426 return avail; 1427 } 1428 1429 static void net2280_fifo_flush(struct usb_ep *_ep) 1430 { 1431 struct net2280_ep *ep; 1432 1433 ep = container_of(_ep, struct net2280_ep, ep); 1434 if (!_ep || (!ep->desc && ep->num != 0)) { 1435 pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep); 1436 return; 1437 } 1438 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) { 1439 dev_err(&ep->dev->pdev->dev, 1440 "%s: Invalid driver=%p or speed=%d\n", 1441 __func__, ep->dev->driver, ep->dev->gadget.speed); 1442 return; 1443 } 1444 1445 writel(BIT(FIFO_FLUSH), &ep->regs->ep_stat); 1446 (void) readl(&ep->regs->ep_rsp); 1447 } 1448 1449 static const struct usb_ep_ops net2280_ep_ops = { 1450 .enable = net2280_enable, 1451 .disable = net2280_disable, 1452 1453 .alloc_request = net2280_alloc_request, 1454 .free_request = net2280_free_request, 1455 1456 .queue = net2280_queue, 1457 .dequeue = net2280_dequeue, 1458 1459 .set_halt = net2280_set_halt, 1460 .set_wedge = net2280_set_wedge, 1461 .fifo_status = net2280_fifo_status, 1462 .fifo_flush = net2280_fifo_flush, 1463 }; 1464 1465 /*-------------------------------------------------------------------------*/ 1466 1467 static int net2280_get_frame(struct usb_gadget *_gadget) 1468 { 1469 struct net2280 *dev; 1470 unsigned long flags; 1471 u16 retval; 1472 1473 if (!_gadget) 1474 return -ENODEV; 1475 dev = container_of(_gadget, struct net2280, gadget); 1476 spin_lock_irqsave(&dev->lock, flags); 1477 retval = get_idx_reg(dev->regs, REG_FRAME) & 0x03ff; 1478 spin_unlock_irqrestore(&dev->lock, flags); 1479 return retval; 1480 } 1481 1482 static int net2280_wakeup(struct usb_gadget *_gadget) 1483 { 1484 struct net2280 *dev; 1485 u32 tmp; 1486 unsigned long flags; 1487 1488 if (!_gadget) 1489 return 0; 1490 dev = container_of(_gadget, struct net2280, gadget); 1491 1492 spin_lock_irqsave(&dev->lock, flags); 1493 tmp = readl(&dev->usb->usbctl); 1494 if (tmp & BIT(DEVICE_REMOTE_WAKEUP_ENABLE)) 1495 writel(BIT(GENERATE_RESUME), &dev->usb->usbstat); 1496 spin_unlock_irqrestore(&dev->lock, flags); 1497 1498 /* pci writes may still be posted */ 1499 return 0; 1500 } 1501 1502 static int net2280_set_selfpowered(struct usb_gadget *_gadget, int value) 1503 { 1504 struct net2280 *dev; 1505 u32 tmp; 1506 unsigned long flags; 1507 1508 if (!_gadget) 1509 return 0; 1510 dev = container_of(_gadget, struct net2280, gadget); 1511 1512 spin_lock_irqsave(&dev->lock, flags); 1513 tmp = readl(&dev->usb->usbctl); 1514 if (value) { 1515 tmp |= BIT(SELF_POWERED_STATUS); 1516 _gadget->is_selfpowered = 1; 1517 } else { 1518 tmp &= ~BIT(SELF_POWERED_STATUS); 1519 _gadget->is_selfpowered = 0; 1520 } 1521 writel(tmp, &dev->usb->usbctl); 1522 spin_unlock_irqrestore(&dev->lock, flags); 1523 1524 return 0; 1525 } 1526 1527 static int net2280_pullup(struct usb_gadget *_gadget, int is_on) 1528 { 1529 struct net2280 *dev; 1530 u32 tmp; 1531 unsigned long flags; 1532 1533 if (!_gadget) 1534 return -ENODEV; 1535 dev = container_of(_gadget, struct net2280, gadget); 1536 1537 spin_lock_irqsave(&dev->lock, flags); 1538 tmp = readl(&dev->usb->usbctl); 1539 dev->softconnect = (is_on != 0); 1540 if (is_on) { 1541 ep0_start(dev); 1542 writel(tmp | BIT(USB_DETECT_ENABLE), &dev->usb->usbctl); 1543 } else { 1544 writel(tmp & ~BIT(USB_DETECT_ENABLE), &dev->usb->usbctl); 1545 stop_activity(dev, dev->driver); 1546 } 1547 1548 spin_unlock_irqrestore(&dev->lock, flags); 1549 1550 return 0; 1551 } 1552 1553 static struct usb_ep *net2280_match_ep(struct usb_gadget *_gadget, 1554 struct usb_endpoint_descriptor *desc, 1555 struct usb_ss_ep_comp_descriptor *ep_comp) 1556 { 1557 char name[8]; 1558 struct usb_ep *ep; 1559 1560 if (usb_endpoint_type(desc) == USB_ENDPOINT_XFER_INT) { 1561 /* ep-e, ep-f are PIO with only 64 byte fifos */ 1562 ep = gadget_find_ep_by_name(_gadget, "ep-e"); 1563 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp)) 1564 return ep; 1565 ep = gadget_find_ep_by_name(_gadget, "ep-f"); 1566 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp)) 1567 return ep; 1568 } 1569 1570 /* USB3380: use same address for usb and hardware endpoints */ 1571 snprintf(name, sizeof(name), "ep%d%s", usb_endpoint_num(desc), 1572 usb_endpoint_dir_in(desc) ? "in" : "out"); 1573 ep = gadget_find_ep_by_name(_gadget, name); 1574 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp)) 1575 return ep; 1576 1577 return NULL; 1578 } 1579 1580 static int net2280_start(struct usb_gadget *_gadget, 1581 struct usb_gadget_driver *driver); 1582 static int net2280_stop(struct usb_gadget *_gadget); 1583 1584 static const struct usb_gadget_ops net2280_ops = { 1585 .get_frame = net2280_get_frame, 1586 .wakeup = net2280_wakeup, 1587 .set_selfpowered = net2280_set_selfpowered, 1588 .pullup = net2280_pullup, 1589 .udc_start = net2280_start, 1590 .udc_stop = net2280_stop, 1591 .match_ep = net2280_match_ep, 1592 }; 1593 1594 /*-------------------------------------------------------------------------*/ 1595 1596 #ifdef CONFIG_USB_GADGET_DEBUG_FILES 1597 1598 /* FIXME move these into procfs, and use seq_file. 1599 * Sysfs _still_ doesn't behave for arbitrarily sized files, 1600 * and also doesn't help products using this with 2.4 kernels. 1601 */ 1602 1603 /* "function" sysfs attribute */ 1604 static ssize_t function_show(struct device *_dev, struct device_attribute *attr, 1605 char *buf) 1606 { 1607 struct net2280 *dev = dev_get_drvdata(_dev); 1608 1609 if (!dev->driver || !dev->driver->function || 1610 strlen(dev->driver->function) > PAGE_SIZE) 1611 return 0; 1612 return scnprintf(buf, PAGE_SIZE, "%s\n", dev->driver->function); 1613 } 1614 static DEVICE_ATTR_RO(function); 1615 1616 static ssize_t registers_show(struct device *_dev, 1617 struct device_attribute *attr, char *buf) 1618 { 1619 struct net2280 *dev; 1620 char *next; 1621 unsigned size, t; 1622 unsigned long flags; 1623 int i; 1624 u32 t1, t2; 1625 const char *s; 1626 1627 dev = dev_get_drvdata(_dev); 1628 next = buf; 1629 size = PAGE_SIZE; 1630 spin_lock_irqsave(&dev->lock, flags); 1631 1632 if (dev->driver) 1633 s = dev->driver->driver.name; 1634 else 1635 s = "(none)"; 1636 1637 /* Main Control Registers */ 1638 t = scnprintf(next, size, "%s version " DRIVER_VERSION 1639 ", chiprev %04x\n\n" 1640 "devinit %03x fifoctl %08x gadget '%s'\n" 1641 "pci irqenb0 %02x irqenb1 %08x " 1642 "irqstat0 %04x irqstat1 %08x\n", 1643 driver_name, dev->chiprev, 1644 readl(&dev->regs->devinit), 1645 readl(&dev->regs->fifoctl), 1646 s, 1647 readl(&dev->regs->pciirqenb0), 1648 readl(&dev->regs->pciirqenb1), 1649 readl(&dev->regs->irqstat0), 1650 readl(&dev->regs->irqstat1)); 1651 size -= t; 1652 next += t; 1653 1654 /* USB Control Registers */ 1655 t1 = readl(&dev->usb->usbctl); 1656 t2 = readl(&dev->usb->usbstat); 1657 if (t1 & BIT(VBUS_PIN)) { 1658 if (t2 & BIT(HIGH_SPEED)) 1659 s = "high speed"; 1660 else if (dev->gadget.speed == USB_SPEED_UNKNOWN) 1661 s = "powered"; 1662 else 1663 s = "full speed"; 1664 /* full speed bit (6) not working?? */ 1665 } else 1666 s = "not attached"; 1667 t = scnprintf(next, size, 1668 "stdrsp %08x usbctl %08x usbstat %08x " 1669 "addr 0x%02x (%s)\n", 1670 readl(&dev->usb->stdrsp), t1, t2, 1671 readl(&dev->usb->ouraddr), s); 1672 size -= t; 1673 next += t; 1674 1675 /* PCI Master Control Registers */ 1676 1677 /* DMA Control Registers */ 1678 1679 /* Configurable EP Control Registers */ 1680 for (i = 0; i < dev->n_ep; i++) { 1681 struct net2280_ep *ep; 1682 1683 ep = &dev->ep[i]; 1684 if (i && !ep->desc) 1685 continue; 1686 1687 t1 = readl(&ep->cfg->ep_cfg); 1688 t2 = readl(&ep->regs->ep_rsp) & 0xff; 1689 t = scnprintf(next, size, 1690 "\n%s\tcfg %05x rsp (%02x) %s%s%s%s%s%s%s%s" 1691 "irqenb %02x\n", 1692 ep->ep.name, t1, t2, 1693 (t2 & BIT(CLEAR_NAK_OUT_PACKETS)) 1694 ? "NAK " : "", 1695 (t2 & BIT(CLEAR_EP_HIDE_STATUS_PHASE)) 1696 ? "hide " : "", 1697 (t2 & BIT(CLEAR_EP_FORCE_CRC_ERROR)) 1698 ? "CRC " : "", 1699 (t2 & BIT(CLEAR_INTERRUPT_MODE)) 1700 ? "interrupt " : "", 1701 (t2 & BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE)) 1702 ? "status " : "", 1703 (t2 & BIT(CLEAR_NAK_OUT_PACKETS_MODE)) 1704 ? "NAKmode " : "", 1705 (t2 & BIT(CLEAR_ENDPOINT_TOGGLE)) 1706 ? "DATA1 " : "DATA0 ", 1707 (t2 & BIT(CLEAR_ENDPOINT_HALT)) 1708 ? "HALT " : "", 1709 readl(&ep->regs->ep_irqenb)); 1710 size -= t; 1711 next += t; 1712 1713 t = scnprintf(next, size, 1714 "\tstat %08x avail %04x " 1715 "(ep%d%s-%s)%s\n", 1716 readl(&ep->regs->ep_stat), 1717 readl(&ep->regs->ep_avail), 1718 t1 & 0x0f, DIR_STRING(t1), 1719 type_string(t1 >> 8), 1720 ep->stopped ? "*" : ""); 1721 size -= t; 1722 next += t; 1723 1724 if (!ep->dma) 1725 continue; 1726 1727 t = scnprintf(next, size, 1728 " dma\tctl %08x stat %08x count %08x\n" 1729 "\taddr %08x desc %08x\n", 1730 readl(&ep->dma->dmactl), 1731 readl(&ep->dma->dmastat), 1732 readl(&ep->dma->dmacount), 1733 readl(&ep->dma->dmaaddr), 1734 readl(&ep->dma->dmadesc)); 1735 size -= t; 1736 next += t; 1737 1738 } 1739 1740 /* Indexed Registers (none yet) */ 1741 1742 /* Statistics */ 1743 t = scnprintf(next, size, "\nirqs: "); 1744 size -= t; 1745 next += t; 1746 for (i = 0; i < dev->n_ep; i++) { 1747 struct net2280_ep *ep; 1748 1749 ep = &dev->ep[i]; 1750 if (i && !ep->irqs) 1751 continue; 1752 t = scnprintf(next, size, " %s/%lu", ep->ep.name, ep->irqs); 1753 size -= t; 1754 next += t; 1755 1756 } 1757 t = scnprintf(next, size, "\n"); 1758 size -= t; 1759 next += t; 1760 1761 spin_unlock_irqrestore(&dev->lock, flags); 1762 1763 return PAGE_SIZE - size; 1764 } 1765 static DEVICE_ATTR_RO(registers); 1766 1767 static ssize_t queues_show(struct device *_dev, struct device_attribute *attr, 1768 char *buf) 1769 { 1770 struct net2280 *dev; 1771 char *next; 1772 unsigned size; 1773 unsigned long flags; 1774 int i; 1775 1776 dev = dev_get_drvdata(_dev); 1777 next = buf; 1778 size = PAGE_SIZE; 1779 spin_lock_irqsave(&dev->lock, flags); 1780 1781 for (i = 0; i < dev->n_ep; i++) { 1782 struct net2280_ep *ep = &dev->ep[i]; 1783 struct net2280_request *req; 1784 int t; 1785 1786 if (i != 0) { 1787 const struct usb_endpoint_descriptor *d; 1788 1789 d = ep->desc; 1790 if (!d) 1791 continue; 1792 t = d->bEndpointAddress; 1793 t = scnprintf(next, size, 1794 "\n%s (ep%d%s-%s) max %04x %s fifo %d\n", 1795 ep->ep.name, t & USB_ENDPOINT_NUMBER_MASK, 1796 (t & USB_DIR_IN) ? "in" : "out", 1797 type_string(d->bmAttributes), 1798 usb_endpoint_maxp(d) & 0x1fff, 1799 ep->dma ? "dma" : "pio", ep->fifo_size 1800 ); 1801 } else /* ep0 should only have one transfer queued */ 1802 t = scnprintf(next, size, "ep0 max 64 pio %s\n", 1803 ep->is_in ? "in" : "out"); 1804 if (t <= 0 || t > size) 1805 goto done; 1806 size -= t; 1807 next += t; 1808 1809 if (list_empty(&ep->queue)) { 1810 t = scnprintf(next, size, "\t(nothing queued)\n"); 1811 if (t <= 0 || t > size) 1812 goto done; 1813 size -= t; 1814 next += t; 1815 continue; 1816 } 1817 list_for_each_entry(req, &ep->queue, queue) { 1818 if (ep->dma && req->td_dma == readl(&ep->dma->dmadesc)) 1819 t = scnprintf(next, size, 1820 "\treq %p len %d/%d " 1821 "buf %p (dmacount %08x)\n", 1822 &req->req, req->req.actual, 1823 req->req.length, req->req.buf, 1824 readl(&ep->dma->dmacount)); 1825 else 1826 t = scnprintf(next, size, 1827 "\treq %p len %d/%d buf %p\n", 1828 &req->req, req->req.actual, 1829 req->req.length, req->req.buf); 1830 if (t <= 0 || t > size) 1831 goto done; 1832 size -= t; 1833 next += t; 1834 1835 if (ep->dma) { 1836 struct net2280_dma *td; 1837 1838 td = req->td; 1839 t = scnprintf(next, size, "\t td %08x " 1840 " count %08x buf %08x desc %08x\n", 1841 (u32) req->td_dma, 1842 le32_to_cpu(td->dmacount), 1843 le32_to_cpu(td->dmaaddr), 1844 le32_to_cpu(td->dmadesc)); 1845 if (t <= 0 || t > size) 1846 goto done; 1847 size -= t; 1848 next += t; 1849 } 1850 } 1851 } 1852 1853 done: 1854 spin_unlock_irqrestore(&dev->lock, flags); 1855 return PAGE_SIZE - size; 1856 } 1857 static DEVICE_ATTR_RO(queues); 1858 1859 1860 #else 1861 1862 #define device_create_file(a, b) (0) 1863 #define device_remove_file(a, b) do { } while (0) 1864 1865 #endif 1866 1867 /*-------------------------------------------------------------------------*/ 1868 1869 /* another driver-specific mode might be a request type doing dma 1870 * to/from another device fifo instead of to/from memory. 1871 */ 1872 1873 static void set_fifo_mode(struct net2280 *dev, int mode) 1874 { 1875 /* keeping high bits preserves BAR2 */ 1876 writel((0xffff << PCI_BASE2_RANGE) | mode, &dev->regs->fifoctl); 1877 1878 /* always ep-{a,b,e,f} ... maybe not ep-c or ep-d */ 1879 INIT_LIST_HEAD(&dev->gadget.ep_list); 1880 list_add_tail(&dev->ep[1].ep.ep_list, &dev->gadget.ep_list); 1881 list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list); 1882 switch (mode) { 1883 case 0: 1884 list_add_tail(&dev->ep[3].ep.ep_list, &dev->gadget.ep_list); 1885 list_add_tail(&dev->ep[4].ep.ep_list, &dev->gadget.ep_list); 1886 dev->ep[1].fifo_size = dev->ep[2].fifo_size = 1024; 1887 break; 1888 case 1: 1889 dev->ep[1].fifo_size = dev->ep[2].fifo_size = 2048; 1890 break; 1891 case 2: 1892 list_add_tail(&dev->ep[3].ep.ep_list, &dev->gadget.ep_list); 1893 dev->ep[1].fifo_size = 2048; 1894 dev->ep[2].fifo_size = 1024; 1895 break; 1896 } 1897 /* fifo sizes for ep0, ep-c, ep-d, ep-e, and ep-f never change */ 1898 list_add_tail(&dev->ep[5].ep.ep_list, &dev->gadget.ep_list); 1899 list_add_tail(&dev->ep[6].ep.ep_list, &dev->gadget.ep_list); 1900 } 1901 1902 static void defect7374_disable_data_eps(struct net2280 *dev) 1903 { 1904 /* 1905 * For Defect 7374, disable data EPs (and more): 1906 * - This phase undoes the earlier phase of the Defect 7374 workaround, 1907 * returing ep regs back to normal. 1908 */ 1909 struct net2280_ep *ep; 1910 int i; 1911 unsigned char ep_sel; 1912 u32 tmp_reg; 1913 1914 for (i = 1; i < 5; i++) { 1915 ep = &dev->ep[i]; 1916 writel(0, &ep->cfg->ep_cfg); 1917 } 1918 1919 /* CSROUT, CSRIN, PCIOUT, PCIIN, STATIN, RCIN */ 1920 for (i = 0; i < 6; i++) 1921 writel(0, &dev->dep[i].dep_cfg); 1922 1923 for (ep_sel = 0; ep_sel <= 21; ep_sel++) { 1924 /* Select an endpoint for subsequent operations: */ 1925 tmp_reg = readl(&dev->plregs->pl_ep_ctrl); 1926 writel(((tmp_reg & ~0x1f) | ep_sel), &dev->plregs->pl_ep_ctrl); 1927 1928 if (ep_sel < 2 || (ep_sel > 9 && ep_sel < 14) || 1929 ep_sel == 18 || ep_sel == 20) 1930 continue; 1931 1932 /* Change settings on some selected endpoints */ 1933 tmp_reg = readl(&dev->plregs->pl_ep_cfg_4); 1934 tmp_reg &= ~BIT(NON_CTRL_IN_TOLERATE_BAD_DIR); 1935 writel(tmp_reg, &dev->plregs->pl_ep_cfg_4); 1936 tmp_reg = readl(&dev->plregs->pl_ep_ctrl); 1937 tmp_reg |= BIT(EP_INITIALIZED); 1938 writel(tmp_reg, &dev->plregs->pl_ep_ctrl); 1939 } 1940 } 1941 1942 static void defect7374_enable_data_eps_zero(struct net2280 *dev) 1943 { 1944 u32 tmp = 0, tmp_reg; 1945 u32 scratch; 1946 int i; 1947 unsigned char ep_sel; 1948 1949 scratch = get_idx_reg(dev->regs, SCRATCH); 1950 1951 WARN_ON((scratch & (0xf << DEFECT7374_FSM_FIELD)) 1952 == DEFECT7374_FSM_SS_CONTROL_READ); 1953 1954 scratch &= ~(0xf << DEFECT7374_FSM_FIELD); 1955 1956 ep_warn(dev, "Operate Defect 7374 workaround soft this time"); 1957 ep_warn(dev, "It will operate on cold-reboot and SS connect"); 1958 1959 /*GPEPs:*/ 1960 tmp = ((0 << ENDPOINT_NUMBER) | BIT(ENDPOINT_DIRECTION) | 1961 (2 << OUT_ENDPOINT_TYPE) | (2 << IN_ENDPOINT_TYPE) | 1962 ((dev->enhanced_mode) ? 1963 BIT(OUT_ENDPOINT_ENABLE) | BIT(IN_ENDPOINT_ENABLE) : 1964 BIT(ENDPOINT_ENABLE))); 1965 1966 for (i = 1; i < 5; i++) 1967 writel(tmp, &dev->ep[i].cfg->ep_cfg); 1968 1969 /* CSRIN, PCIIN, STATIN, RCIN*/ 1970 tmp = ((0 << ENDPOINT_NUMBER) | BIT(ENDPOINT_ENABLE)); 1971 writel(tmp, &dev->dep[1].dep_cfg); 1972 writel(tmp, &dev->dep[3].dep_cfg); 1973 writel(tmp, &dev->dep[4].dep_cfg); 1974 writel(tmp, &dev->dep[5].dep_cfg); 1975 1976 /*Implemented for development and debug. 1977 * Can be refined/tuned later.*/ 1978 for (ep_sel = 0; ep_sel <= 21; ep_sel++) { 1979 /* Select an endpoint for subsequent operations: */ 1980 tmp_reg = readl(&dev->plregs->pl_ep_ctrl); 1981 writel(((tmp_reg & ~0x1f) | ep_sel), 1982 &dev->plregs->pl_ep_ctrl); 1983 1984 if (ep_sel == 1) { 1985 tmp = 1986 (readl(&dev->plregs->pl_ep_ctrl) | 1987 BIT(CLEAR_ACK_ERROR_CODE) | 0); 1988 writel(tmp, &dev->plregs->pl_ep_ctrl); 1989 continue; 1990 } 1991 1992 if (ep_sel == 0 || (ep_sel > 9 && ep_sel < 14) || 1993 ep_sel == 18 || ep_sel == 20) 1994 continue; 1995 1996 tmp = (readl(&dev->plregs->pl_ep_cfg_4) | 1997 BIT(NON_CTRL_IN_TOLERATE_BAD_DIR) | 0); 1998 writel(tmp, &dev->plregs->pl_ep_cfg_4); 1999 2000 tmp = readl(&dev->plregs->pl_ep_ctrl) & 2001 ~BIT(EP_INITIALIZED); 2002 writel(tmp, &dev->plregs->pl_ep_ctrl); 2003 2004 } 2005 2006 /* Set FSM to focus on the first Control Read: 2007 * - Tip: Connection speed is known upon the first 2008 * setup request.*/ 2009 scratch |= DEFECT7374_FSM_WAITING_FOR_CONTROL_READ; 2010 set_idx_reg(dev->regs, SCRATCH, scratch); 2011 2012 } 2013 2014 /* keeping it simple: 2015 * - one bus driver, initted first; 2016 * - one function driver, initted second 2017 * 2018 * most of the work to support multiple net2280 controllers would 2019 * be to associate this gadget driver (yes?) with all of them, or 2020 * perhaps to bind specific drivers to specific devices. 2021 */ 2022 2023 static void usb_reset_228x(struct net2280 *dev) 2024 { 2025 u32 tmp; 2026 2027 dev->gadget.speed = USB_SPEED_UNKNOWN; 2028 (void) readl(&dev->usb->usbctl); 2029 2030 net2280_led_init(dev); 2031 2032 /* disable automatic responses, and irqs */ 2033 writel(0, &dev->usb->stdrsp); 2034 writel(0, &dev->regs->pciirqenb0); 2035 writel(0, &dev->regs->pciirqenb1); 2036 2037 /* clear old dma and irq state */ 2038 for (tmp = 0; tmp < 4; tmp++) { 2039 struct net2280_ep *ep = &dev->ep[tmp + 1]; 2040 if (ep->dma) 2041 abort_dma(ep); 2042 } 2043 2044 writel(~0, &dev->regs->irqstat0), 2045 writel(~(u32)BIT(SUSPEND_REQUEST_INTERRUPT), &dev->regs->irqstat1), 2046 2047 /* reset, and enable pci */ 2048 tmp = readl(&dev->regs->devinit) | 2049 BIT(PCI_ENABLE) | 2050 BIT(FIFO_SOFT_RESET) | 2051 BIT(USB_SOFT_RESET) | 2052 BIT(M8051_RESET); 2053 writel(tmp, &dev->regs->devinit); 2054 2055 /* standard fifo and endpoint allocations */ 2056 set_fifo_mode(dev, (fifo_mode <= 2) ? fifo_mode : 0); 2057 } 2058 2059 static void usb_reset_338x(struct net2280 *dev) 2060 { 2061 u32 tmp; 2062 2063 dev->gadget.speed = USB_SPEED_UNKNOWN; 2064 (void)readl(&dev->usb->usbctl); 2065 2066 net2280_led_init(dev); 2067 2068 if (dev->bug7734_patched) { 2069 /* disable automatic responses, and irqs */ 2070 writel(0, &dev->usb->stdrsp); 2071 writel(0, &dev->regs->pciirqenb0); 2072 writel(0, &dev->regs->pciirqenb1); 2073 } 2074 2075 /* clear old dma and irq state */ 2076 for (tmp = 0; tmp < 4; tmp++) { 2077 struct net2280_ep *ep = &dev->ep[tmp + 1]; 2078 struct net2280_dma_regs __iomem *dma; 2079 2080 if (ep->dma) { 2081 abort_dma(ep); 2082 } else { 2083 dma = &dev->dma[tmp]; 2084 writel(BIT(DMA_ABORT), &dma->dmastat); 2085 writel(0, &dma->dmactl); 2086 } 2087 } 2088 2089 writel(~0, &dev->regs->irqstat0), writel(~0, &dev->regs->irqstat1); 2090 2091 if (dev->bug7734_patched) { 2092 /* reset, and enable pci */ 2093 tmp = readl(&dev->regs->devinit) | 2094 BIT(PCI_ENABLE) | 2095 BIT(FIFO_SOFT_RESET) | 2096 BIT(USB_SOFT_RESET) | 2097 BIT(M8051_RESET); 2098 2099 writel(tmp, &dev->regs->devinit); 2100 } 2101 2102 /* always ep-{1,2,3,4} ... maybe not ep-3 or ep-4 */ 2103 INIT_LIST_HEAD(&dev->gadget.ep_list); 2104 2105 for (tmp = 1; tmp < dev->n_ep; tmp++) 2106 list_add_tail(&dev->ep[tmp].ep.ep_list, &dev->gadget.ep_list); 2107 2108 } 2109 2110 static void usb_reset(struct net2280 *dev) 2111 { 2112 if (dev->quirks & PLX_LEGACY) 2113 return usb_reset_228x(dev); 2114 return usb_reset_338x(dev); 2115 } 2116 2117 static void usb_reinit_228x(struct net2280 *dev) 2118 { 2119 u32 tmp; 2120 2121 /* basic endpoint init */ 2122 for (tmp = 0; tmp < 7; tmp++) { 2123 struct net2280_ep *ep = &dev->ep[tmp]; 2124 2125 ep->ep.name = ep_info_dft[tmp].name; 2126 ep->ep.caps = ep_info_dft[tmp].caps; 2127 ep->dev = dev; 2128 ep->num = tmp; 2129 2130 if (tmp > 0 && tmp <= 4) { 2131 ep->fifo_size = 1024; 2132 ep->dma = &dev->dma[tmp - 1]; 2133 } else 2134 ep->fifo_size = 64; 2135 ep->regs = &dev->epregs[tmp]; 2136 ep->cfg = &dev->epregs[tmp]; 2137 ep_reset_228x(dev->regs, ep); 2138 } 2139 usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 64); 2140 usb_ep_set_maxpacket_limit(&dev->ep[5].ep, 64); 2141 usb_ep_set_maxpacket_limit(&dev->ep[6].ep, 64); 2142 2143 dev->gadget.ep0 = &dev->ep[0].ep; 2144 dev->ep[0].stopped = 0; 2145 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); 2146 2147 /* we want to prevent lowlevel/insecure access from the USB host, 2148 * but erratum 0119 means this enable bit is ignored 2149 */ 2150 for (tmp = 0; tmp < 5; tmp++) 2151 writel(EP_DONTUSE, &dev->dep[tmp].dep_cfg); 2152 } 2153 2154 static void usb_reinit_338x(struct net2280 *dev) 2155 { 2156 int i; 2157 u32 tmp, val; 2158 static const u32 ne[9] = { 0, 1, 2, 3, 4, 1, 2, 3, 4 }; 2159 static const u32 ep_reg_addr[9] = { 0x00, 0xC0, 0x00, 0xC0, 0x00, 2160 0x00, 0xC0, 0x00, 0xC0 }; 2161 2162 /* basic endpoint init */ 2163 for (i = 0; i < dev->n_ep; i++) { 2164 struct net2280_ep *ep = &dev->ep[i]; 2165 2166 ep->ep.name = dev->enhanced_mode ? ep_info_adv[i].name : 2167 ep_info_dft[i].name; 2168 ep->ep.caps = dev->enhanced_mode ? ep_info_adv[i].caps : 2169 ep_info_dft[i].caps; 2170 ep->dev = dev; 2171 ep->num = i; 2172 2173 if (i > 0 && i <= 4) 2174 ep->dma = &dev->dma[i - 1]; 2175 2176 if (dev->enhanced_mode) { 2177 ep->cfg = &dev->epregs[ne[i]]; 2178 /* 2179 * Set USB endpoint number, hardware allows same number 2180 * in both directions. 2181 */ 2182 if (i > 0 && i < 5) 2183 writel(ne[i], &ep->cfg->ep_cfg); 2184 ep->regs = (struct net2280_ep_regs __iomem *) 2185 (((void __iomem *)&dev->epregs[ne[i]]) + 2186 ep_reg_addr[i]); 2187 } else { 2188 ep->cfg = &dev->epregs[i]; 2189 ep->regs = &dev->epregs[i]; 2190 } 2191 2192 ep->fifo_size = (i != 0) ? 2048 : 512; 2193 2194 ep_reset_338x(dev->regs, ep); 2195 } 2196 usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 512); 2197 2198 dev->gadget.ep0 = &dev->ep[0].ep; 2199 dev->ep[0].stopped = 0; 2200 2201 /* Link layer set up */ 2202 if (dev->bug7734_patched) { 2203 tmp = readl(&dev->usb_ext->usbctl2) & 2204 ~(BIT(U1_ENABLE) | BIT(U2_ENABLE) | BIT(LTM_ENABLE)); 2205 writel(tmp, &dev->usb_ext->usbctl2); 2206 } 2207 2208 /* Hardware Defect and Workaround */ 2209 val = readl(&dev->ll_lfps_regs->ll_lfps_5); 2210 val &= ~(0xf << TIMER_LFPS_6US); 2211 val |= 0x5 << TIMER_LFPS_6US; 2212 writel(val, &dev->ll_lfps_regs->ll_lfps_5); 2213 2214 val = readl(&dev->ll_lfps_regs->ll_lfps_6); 2215 val &= ~(0xffff << TIMER_LFPS_80US); 2216 val |= 0x0100 << TIMER_LFPS_80US; 2217 writel(val, &dev->ll_lfps_regs->ll_lfps_6); 2218 2219 /* 2220 * AA_AB Errata. Issue 4. Workaround for SuperSpeed USB 2221 * Hot Reset Exit Handshake may Fail in Specific Case using 2222 * Default Register Settings. Workaround for Enumeration test. 2223 */ 2224 val = readl(&dev->ll_tsn_regs->ll_tsn_counters_2); 2225 val &= ~(0x1f << HOT_TX_NORESET_TS2); 2226 val |= 0x10 << HOT_TX_NORESET_TS2; 2227 writel(val, &dev->ll_tsn_regs->ll_tsn_counters_2); 2228 2229 val = readl(&dev->ll_tsn_regs->ll_tsn_counters_3); 2230 val &= ~(0x1f << HOT_RX_RESET_TS2); 2231 val |= 0x3 << HOT_RX_RESET_TS2; 2232 writel(val, &dev->ll_tsn_regs->ll_tsn_counters_3); 2233 2234 /* 2235 * Set Recovery Idle to Recover bit: 2236 * - On SS connections, setting Recovery Idle to Recover Fmw improves 2237 * link robustness with various hosts and hubs. 2238 * - It is safe to set for all connection speeds; all chip revisions. 2239 * - R-M-W to leave other bits undisturbed. 2240 * - Reference PLX TT-7372 2241 */ 2242 val = readl(&dev->ll_chicken_reg->ll_tsn_chicken_bit); 2243 val |= BIT(RECOVERY_IDLE_TO_RECOVER_FMW); 2244 writel(val, &dev->ll_chicken_reg->ll_tsn_chicken_bit); 2245 2246 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); 2247 2248 /* disable dedicated endpoints */ 2249 writel(0x0D, &dev->dep[0].dep_cfg); 2250 writel(0x0D, &dev->dep[1].dep_cfg); 2251 writel(0x0E, &dev->dep[2].dep_cfg); 2252 writel(0x0E, &dev->dep[3].dep_cfg); 2253 writel(0x0F, &dev->dep[4].dep_cfg); 2254 writel(0x0C, &dev->dep[5].dep_cfg); 2255 } 2256 2257 static void usb_reinit(struct net2280 *dev) 2258 { 2259 if (dev->quirks & PLX_LEGACY) 2260 return usb_reinit_228x(dev); 2261 return usb_reinit_338x(dev); 2262 } 2263 2264 static void ep0_start_228x(struct net2280 *dev) 2265 { 2266 writel(BIT(CLEAR_EP_HIDE_STATUS_PHASE) | 2267 BIT(CLEAR_NAK_OUT_PACKETS) | 2268 BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE), 2269 &dev->epregs[0].ep_rsp); 2270 2271 /* 2272 * hardware optionally handles a bunch of standard requests 2273 * that the API hides from drivers anyway. have it do so. 2274 * endpoint status/features are handled in software, to 2275 * help pass tests for some dubious behavior. 2276 */ 2277 writel(BIT(SET_TEST_MODE) | 2278 BIT(SET_ADDRESS) | 2279 BIT(DEVICE_SET_CLEAR_DEVICE_REMOTE_WAKEUP) | 2280 BIT(GET_DEVICE_STATUS) | 2281 BIT(GET_INTERFACE_STATUS), 2282 &dev->usb->stdrsp); 2283 writel(BIT(USB_ROOT_PORT_WAKEUP_ENABLE) | 2284 BIT(SELF_POWERED_USB_DEVICE) | 2285 BIT(REMOTE_WAKEUP_SUPPORT) | 2286 (dev->softconnect << USB_DETECT_ENABLE) | 2287 BIT(SELF_POWERED_STATUS), 2288 &dev->usb->usbctl); 2289 2290 /* enable irqs so we can see ep0 and general operation */ 2291 writel(BIT(SETUP_PACKET_INTERRUPT_ENABLE) | 2292 BIT(ENDPOINT_0_INTERRUPT_ENABLE), 2293 &dev->regs->pciirqenb0); 2294 writel(BIT(PCI_INTERRUPT_ENABLE) | 2295 BIT(PCI_MASTER_ABORT_RECEIVED_INTERRUPT_ENABLE) | 2296 BIT(PCI_TARGET_ABORT_RECEIVED_INTERRUPT_ENABLE) | 2297 BIT(PCI_RETRY_ABORT_INTERRUPT_ENABLE) | 2298 BIT(VBUS_INTERRUPT_ENABLE) | 2299 BIT(ROOT_PORT_RESET_INTERRUPT_ENABLE) | 2300 BIT(SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE), 2301 &dev->regs->pciirqenb1); 2302 2303 /* don't leave any writes posted */ 2304 (void) readl(&dev->usb->usbctl); 2305 } 2306 2307 static void ep0_start_338x(struct net2280 *dev) 2308 { 2309 2310 if (dev->bug7734_patched) 2311 writel(BIT(CLEAR_NAK_OUT_PACKETS_MODE) | 2312 BIT(SET_EP_HIDE_STATUS_PHASE), 2313 &dev->epregs[0].ep_rsp); 2314 2315 /* 2316 * hardware optionally handles a bunch of standard requests 2317 * that the API hides from drivers anyway. have it do so. 2318 * endpoint status/features are handled in software, to 2319 * help pass tests for some dubious behavior. 2320 */ 2321 writel(BIT(SET_ISOCHRONOUS_DELAY) | 2322 BIT(SET_SEL) | 2323 BIT(SET_TEST_MODE) | 2324 BIT(SET_ADDRESS) | 2325 BIT(GET_INTERFACE_STATUS) | 2326 BIT(GET_DEVICE_STATUS), 2327 &dev->usb->stdrsp); 2328 dev->wakeup_enable = 1; 2329 writel(BIT(USB_ROOT_PORT_WAKEUP_ENABLE) | 2330 (dev->softconnect << USB_DETECT_ENABLE) | 2331 BIT(DEVICE_REMOTE_WAKEUP_ENABLE), 2332 &dev->usb->usbctl); 2333 2334 /* enable irqs so we can see ep0 and general operation */ 2335 writel(BIT(SETUP_PACKET_INTERRUPT_ENABLE) | 2336 BIT(ENDPOINT_0_INTERRUPT_ENABLE), 2337 &dev->regs->pciirqenb0); 2338 writel(BIT(PCI_INTERRUPT_ENABLE) | 2339 BIT(ROOT_PORT_RESET_INTERRUPT_ENABLE) | 2340 BIT(SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE) | 2341 BIT(VBUS_INTERRUPT_ENABLE), 2342 &dev->regs->pciirqenb1); 2343 2344 /* don't leave any writes posted */ 2345 (void)readl(&dev->usb->usbctl); 2346 } 2347 2348 static void ep0_start(struct net2280 *dev) 2349 { 2350 if (dev->quirks & PLX_LEGACY) 2351 return ep0_start_228x(dev); 2352 return ep0_start_338x(dev); 2353 } 2354 2355 /* when a driver is successfully registered, it will receive 2356 * control requests including set_configuration(), which enables 2357 * non-control requests. then usb traffic follows until a 2358 * disconnect is reported. then a host may connect again, or 2359 * the driver might get unbound. 2360 */ 2361 static int net2280_start(struct usb_gadget *_gadget, 2362 struct usb_gadget_driver *driver) 2363 { 2364 struct net2280 *dev; 2365 int retval; 2366 unsigned i; 2367 2368 /* insist on high speed support from the driver, since 2369 * (dev->usb->xcvrdiag & FORCE_FULL_SPEED_MODE) 2370 * "must not be used in normal operation" 2371 */ 2372 if (!driver || driver->max_speed < USB_SPEED_HIGH || 2373 !driver->setup) 2374 return -EINVAL; 2375 2376 dev = container_of(_gadget, struct net2280, gadget); 2377 2378 for (i = 0; i < dev->n_ep; i++) 2379 dev->ep[i].irqs = 0; 2380 2381 /* hook up the driver ... */ 2382 driver->driver.bus = NULL; 2383 dev->driver = driver; 2384 2385 retval = device_create_file(&dev->pdev->dev, &dev_attr_function); 2386 if (retval) 2387 goto err_unbind; 2388 retval = device_create_file(&dev->pdev->dev, &dev_attr_queues); 2389 if (retval) 2390 goto err_func; 2391 2392 /* enable host detection and ep0; and we're ready 2393 * for set_configuration as well as eventual disconnect. 2394 */ 2395 net2280_led_active(dev, 1); 2396 2397 if ((dev->quirks & PLX_SUPERSPEED) && !dev->bug7734_patched) 2398 defect7374_enable_data_eps_zero(dev); 2399 2400 ep0_start(dev); 2401 2402 /* pci writes may still be posted */ 2403 return 0; 2404 2405 err_func: 2406 device_remove_file(&dev->pdev->dev, &dev_attr_function); 2407 err_unbind: 2408 dev->driver = NULL; 2409 return retval; 2410 } 2411 2412 static void stop_activity(struct net2280 *dev, struct usb_gadget_driver *driver) 2413 { 2414 int i; 2415 2416 /* don't disconnect if it's not connected */ 2417 if (dev->gadget.speed == USB_SPEED_UNKNOWN) 2418 driver = NULL; 2419 2420 /* stop hardware; prevent new request submissions; 2421 * and kill any outstanding requests. 2422 */ 2423 usb_reset(dev); 2424 for (i = 0; i < dev->n_ep; i++) 2425 nuke(&dev->ep[i]); 2426 2427 /* report disconnect; the driver is already quiesced */ 2428 if (driver) { 2429 spin_unlock(&dev->lock); 2430 driver->disconnect(&dev->gadget); 2431 spin_lock(&dev->lock); 2432 } 2433 2434 usb_reinit(dev); 2435 } 2436 2437 static int net2280_stop(struct usb_gadget *_gadget) 2438 { 2439 struct net2280 *dev; 2440 unsigned long flags; 2441 2442 dev = container_of(_gadget, struct net2280, gadget); 2443 2444 spin_lock_irqsave(&dev->lock, flags); 2445 stop_activity(dev, NULL); 2446 spin_unlock_irqrestore(&dev->lock, flags); 2447 2448 net2280_led_active(dev, 0); 2449 2450 device_remove_file(&dev->pdev->dev, &dev_attr_function); 2451 device_remove_file(&dev->pdev->dev, &dev_attr_queues); 2452 2453 dev->driver = NULL; 2454 2455 return 0; 2456 } 2457 2458 /*-------------------------------------------------------------------------*/ 2459 2460 /* handle ep0, ep-e, ep-f with 64 byte packets: packet per irq. 2461 * also works for dma-capable endpoints, in pio mode or just 2462 * to manually advance the queue after short OUT transfers. 2463 */ 2464 static void handle_ep_small(struct net2280_ep *ep) 2465 { 2466 struct net2280_request *req; 2467 u32 t; 2468 /* 0 error, 1 mid-data, 2 done */ 2469 int mode = 1; 2470 2471 if (!list_empty(&ep->queue)) 2472 req = list_entry(ep->queue.next, 2473 struct net2280_request, queue); 2474 else 2475 req = NULL; 2476 2477 /* ack all, and handle what we care about */ 2478 t = readl(&ep->regs->ep_stat); 2479 ep->irqs++; 2480 2481 ep_vdbg(ep->dev, "%s ack ep_stat %08x, req %p\n", 2482 ep->ep.name, t, req ? &req->req : NULL); 2483 2484 if (!ep->is_in || (ep->dev->quirks & PLX_2280)) 2485 writel(t & ~BIT(NAK_OUT_PACKETS), &ep->regs->ep_stat); 2486 else 2487 /* Added for 2282 */ 2488 writel(t, &ep->regs->ep_stat); 2489 2490 /* for ep0, monitor token irqs to catch data stage length errors 2491 * and to synchronize on status. 2492 * 2493 * also, to defer reporting of protocol stalls ... here's where 2494 * data or status first appears, handling stalls here should never 2495 * cause trouble on the host side.. 2496 * 2497 * control requests could be slightly faster without token synch for 2498 * status, but status can jam up that way. 2499 */ 2500 if (unlikely(ep->num == 0)) { 2501 if (ep->is_in) { 2502 /* status; stop NAKing */ 2503 if (t & BIT(DATA_OUT_PING_TOKEN_INTERRUPT)) { 2504 if (ep->dev->protocol_stall) { 2505 ep->stopped = 1; 2506 set_halt(ep); 2507 } 2508 if (!req) 2509 allow_status(ep); 2510 mode = 2; 2511 /* reply to extra IN data tokens with a zlp */ 2512 } else if (t & BIT(DATA_IN_TOKEN_INTERRUPT)) { 2513 if (ep->dev->protocol_stall) { 2514 ep->stopped = 1; 2515 set_halt(ep); 2516 mode = 2; 2517 } else if (ep->responded && 2518 !req && !ep->stopped) 2519 write_fifo(ep, NULL); 2520 } 2521 } else { 2522 /* status; stop NAKing */ 2523 if (t & BIT(DATA_IN_TOKEN_INTERRUPT)) { 2524 if (ep->dev->protocol_stall) { 2525 ep->stopped = 1; 2526 set_halt(ep); 2527 } 2528 mode = 2; 2529 /* an extra OUT token is an error */ 2530 } else if (((t & BIT(DATA_OUT_PING_TOKEN_INTERRUPT)) && 2531 req && 2532 req->req.actual == req->req.length) || 2533 (ep->responded && !req)) { 2534 ep->dev->protocol_stall = 1; 2535 set_halt(ep); 2536 ep->stopped = 1; 2537 if (req) 2538 done(ep, req, -EOVERFLOW); 2539 req = NULL; 2540 } 2541 } 2542 } 2543 2544 if (unlikely(!req)) 2545 return; 2546 2547 /* manual DMA queue advance after short OUT */ 2548 if (likely(ep->dma)) { 2549 if (t & BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT)) { 2550 u32 count; 2551 int stopped = ep->stopped; 2552 2553 /* TRANSFERRED works around OUT_DONE erratum 0112. 2554 * we expect (N <= maxpacket) bytes; host wrote M. 2555 * iff (M < N) we won't ever see a DMA interrupt. 2556 */ 2557 ep->stopped = 1; 2558 for (count = 0; ; t = readl(&ep->regs->ep_stat)) { 2559 2560 /* any preceding dma transfers must finish. 2561 * dma handles (M >= N), may empty the queue 2562 */ 2563 scan_dma_completions(ep); 2564 if (unlikely(list_empty(&ep->queue) || 2565 ep->out_overflow)) { 2566 req = NULL; 2567 break; 2568 } 2569 req = list_entry(ep->queue.next, 2570 struct net2280_request, queue); 2571 2572 /* here either (M < N), a "real" short rx; 2573 * or (M == N) and the queue didn't empty 2574 */ 2575 if (likely(t & BIT(FIFO_EMPTY))) { 2576 count = readl(&ep->dma->dmacount); 2577 count &= DMA_BYTE_COUNT_MASK; 2578 if (readl(&ep->dma->dmadesc) 2579 != req->td_dma) 2580 req = NULL; 2581 break; 2582 } 2583 udelay(1); 2584 } 2585 2586 /* stop DMA, leave ep NAKing */ 2587 writel(BIT(DMA_ABORT), &ep->dma->dmastat); 2588 spin_stop_dma(ep->dma); 2589 2590 if (likely(req)) { 2591 req->td->dmacount = 0; 2592 t = readl(&ep->regs->ep_avail); 2593 dma_done(ep, req, count, 2594 (ep->out_overflow || t) 2595 ? -EOVERFLOW : 0); 2596 } 2597 2598 /* also flush to prevent erratum 0106 trouble */ 2599 if (unlikely(ep->out_overflow || 2600 (ep->dev->chiprev == 0x0100 && 2601 ep->dev->gadget.speed 2602 == USB_SPEED_FULL))) { 2603 out_flush(ep); 2604 ep->out_overflow = 0; 2605 } 2606 2607 /* (re)start dma if needed, stop NAKing */ 2608 ep->stopped = stopped; 2609 if (!list_empty(&ep->queue)) 2610 restart_dma(ep); 2611 } else 2612 ep_dbg(ep->dev, "%s dma ep_stat %08x ??\n", 2613 ep->ep.name, t); 2614 return; 2615 2616 /* data packet(s) received (in the fifo, OUT) */ 2617 } else if (t & BIT(DATA_PACKET_RECEIVED_INTERRUPT)) { 2618 if (read_fifo(ep, req) && ep->num != 0) 2619 mode = 2; 2620 2621 /* data packet(s) transmitted (IN) */ 2622 } else if (t & BIT(DATA_PACKET_TRANSMITTED_INTERRUPT)) { 2623 unsigned len; 2624 2625 len = req->req.length - req->req.actual; 2626 if (len > ep->ep.maxpacket) 2627 len = ep->ep.maxpacket; 2628 req->req.actual += len; 2629 2630 /* if we wrote it all, we're usually done */ 2631 /* send zlps until the status stage */ 2632 if ((req->req.actual == req->req.length) && 2633 (!req->req.zero || len != ep->ep.maxpacket) && ep->num) 2634 mode = 2; 2635 2636 /* there was nothing to do ... */ 2637 } else if (mode == 1) 2638 return; 2639 2640 /* done */ 2641 if (mode == 2) { 2642 /* stream endpoints often resubmit/unlink in completion */ 2643 done(ep, req, 0); 2644 2645 /* maybe advance queue to next request */ 2646 if (ep->num == 0) { 2647 /* NOTE: net2280 could let gadget driver start the 2648 * status stage later. since not all controllers let 2649 * them control that, the api doesn't (yet) allow it. 2650 */ 2651 if (!ep->stopped) 2652 allow_status(ep); 2653 req = NULL; 2654 } else { 2655 if (!list_empty(&ep->queue) && !ep->stopped) 2656 req = list_entry(ep->queue.next, 2657 struct net2280_request, queue); 2658 else 2659 req = NULL; 2660 if (req && !ep->is_in) 2661 stop_out_naking(ep); 2662 } 2663 } 2664 2665 /* is there a buffer for the next packet? 2666 * for best streaming performance, make sure there is one. 2667 */ 2668 if (req && !ep->stopped) { 2669 2670 /* load IN fifo with next packet (may be zlp) */ 2671 if (t & BIT(DATA_PACKET_TRANSMITTED_INTERRUPT)) 2672 write_fifo(ep, &req->req); 2673 } 2674 } 2675 2676 static struct net2280_ep *get_ep_by_addr(struct net2280 *dev, u16 wIndex) 2677 { 2678 struct net2280_ep *ep; 2679 2680 if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0) 2681 return &dev->ep[0]; 2682 list_for_each_entry(ep, &dev->gadget.ep_list, ep.ep_list) { 2683 u8 bEndpointAddress; 2684 2685 if (!ep->desc) 2686 continue; 2687 bEndpointAddress = ep->desc->bEndpointAddress; 2688 if ((wIndex ^ bEndpointAddress) & USB_DIR_IN) 2689 continue; 2690 if ((wIndex & 0x0f) == (bEndpointAddress & 0x0f)) 2691 return ep; 2692 } 2693 return NULL; 2694 } 2695 2696 static void defect7374_workaround(struct net2280 *dev, struct usb_ctrlrequest r) 2697 { 2698 u32 scratch, fsmvalue; 2699 u32 ack_wait_timeout, state; 2700 2701 /* Workaround for Defect 7374 (U1/U2 erroneously rejected): */ 2702 scratch = get_idx_reg(dev->regs, SCRATCH); 2703 fsmvalue = scratch & (0xf << DEFECT7374_FSM_FIELD); 2704 scratch &= ~(0xf << DEFECT7374_FSM_FIELD); 2705 2706 if (!((fsmvalue == DEFECT7374_FSM_WAITING_FOR_CONTROL_READ) && 2707 (r.bRequestType & USB_DIR_IN))) 2708 return; 2709 2710 /* This is the first Control Read for this connection: */ 2711 if (!(readl(&dev->usb->usbstat) & BIT(SUPER_SPEED_MODE))) { 2712 /* 2713 * Connection is NOT SS: 2714 * - Connection must be FS or HS. 2715 * - This FSM state should allow workaround software to 2716 * run after the next USB connection. 2717 */ 2718 scratch |= DEFECT7374_FSM_NON_SS_CONTROL_READ; 2719 dev->bug7734_patched = 1; 2720 goto restore_data_eps; 2721 } 2722 2723 /* Connection is SS: */ 2724 for (ack_wait_timeout = 0; 2725 ack_wait_timeout < DEFECT_7374_NUMBEROF_MAX_WAIT_LOOPS; 2726 ack_wait_timeout++) { 2727 2728 state = readl(&dev->plregs->pl_ep_status_1) 2729 & (0xff << STATE); 2730 if ((state >= (ACK_GOOD_NORMAL << STATE)) && 2731 (state <= (ACK_GOOD_MORE_ACKS_TO_COME << STATE))) { 2732 scratch |= DEFECT7374_FSM_SS_CONTROL_READ; 2733 dev->bug7734_patched = 1; 2734 break; 2735 } 2736 2737 /* 2738 * We have not yet received host's Data Phase ACK 2739 * - Wait and try again. 2740 */ 2741 udelay(DEFECT_7374_PROCESSOR_WAIT_TIME); 2742 2743 continue; 2744 } 2745 2746 2747 if (ack_wait_timeout >= DEFECT_7374_NUMBEROF_MAX_WAIT_LOOPS) { 2748 ep_err(dev, "FAIL: Defect 7374 workaround waited but failed " 2749 "to detect SS host's data phase ACK."); 2750 ep_err(dev, "PL_EP_STATUS_1(23:16):.Expected from 0x11 to 0x16" 2751 "got 0x%2.2x.\n", state >> STATE); 2752 } else { 2753 ep_warn(dev, "INFO: Defect 7374 workaround waited about\n" 2754 "%duSec for Control Read Data Phase ACK\n", 2755 DEFECT_7374_PROCESSOR_WAIT_TIME * ack_wait_timeout); 2756 } 2757 2758 restore_data_eps: 2759 /* 2760 * Restore data EPs to their pre-workaround settings (disabled, 2761 * initialized, and other details). 2762 */ 2763 defect7374_disable_data_eps(dev); 2764 2765 set_idx_reg(dev->regs, SCRATCH, scratch); 2766 2767 return; 2768 } 2769 2770 static void ep_clear_seqnum(struct net2280_ep *ep) 2771 { 2772 struct net2280 *dev = ep->dev; 2773 u32 val; 2774 static const u32 ep_pl[9] = { 0, 3, 4, 7, 8, 2, 5, 6, 9 }; 2775 2776 val = readl(&dev->plregs->pl_ep_ctrl) & ~0x1f; 2777 val |= ep_pl[ep->num]; 2778 writel(val, &dev->plregs->pl_ep_ctrl); 2779 val |= BIT(SEQUENCE_NUMBER_RESET); 2780 writel(val, &dev->plregs->pl_ep_ctrl); 2781 2782 return; 2783 } 2784 2785 static void handle_stat0_irqs_superspeed(struct net2280 *dev, 2786 struct net2280_ep *ep, struct usb_ctrlrequest r) 2787 { 2788 int tmp = 0; 2789 2790 #define w_value le16_to_cpu(r.wValue) 2791 #define w_index le16_to_cpu(r.wIndex) 2792 #define w_length le16_to_cpu(r.wLength) 2793 2794 switch (r.bRequest) { 2795 struct net2280_ep *e; 2796 u16 status; 2797 2798 case USB_REQ_SET_CONFIGURATION: 2799 dev->addressed_state = !w_value; 2800 goto usb3_delegate; 2801 2802 case USB_REQ_GET_STATUS: 2803 switch (r.bRequestType) { 2804 case (USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_DEVICE): 2805 status = dev->wakeup_enable ? 0x02 : 0x00; 2806 if (dev->gadget.is_selfpowered) 2807 status |= BIT(0); 2808 status |= (dev->u1_enable << 2 | dev->u2_enable << 3 | 2809 dev->ltm_enable << 4); 2810 writel(0, &dev->epregs[0].ep_irqenb); 2811 set_fifo_bytecount(ep, sizeof(status)); 2812 writel((__force u32) status, &dev->epregs[0].ep_data); 2813 allow_status_338x(ep); 2814 break; 2815 2816 case (USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_ENDPOINT): 2817 e = get_ep_by_addr(dev, w_index); 2818 if (!e) 2819 goto do_stall3; 2820 status = readl(&e->regs->ep_rsp) & 2821 BIT(CLEAR_ENDPOINT_HALT); 2822 writel(0, &dev->epregs[0].ep_irqenb); 2823 set_fifo_bytecount(ep, sizeof(status)); 2824 writel((__force u32) status, &dev->epregs[0].ep_data); 2825 allow_status_338x(ep); 2826 break; 2827 2828 default: 2829 goto usb3_delegate; 2830 } 2831 break; 2832 2833 case USB_REQ_CLEAR_FEATURE: 2834 switch (r.bRequestType) { 2835 case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE): 2836 if (!dev->addressed_state) { 2837 switch (w_value) { 2838 case USB_DEVICE_U1_ENABLE: 2839 dev->u1_enable = 0; 2840 writel(readl(&dev->usb_ext->usbctl2) & 2841 ~BIT(U1_ENABLE), 2842 &dev->usb_ext->usbctl2); 2843 allow_status_338x(ep); 2844 goto next_endpoints3; 2845 2846 case USB_DEVICE_U2_ENABLE: 2847 dev->u2_enable = 0; 2848 writel(readl(&dev->usb_ext->usbctl2) & 2849 ~BIT(U2_ENABLE), 2850 &dev->usb_ext->usbctl2); 2851 allow_status_338x(ep); 2852 goto next_endpoints3; 2853 2854 case USB_DEVICE_LTM_ENABLE: 2855 dev->ltm_enable = 0; 2856 writel(readl(&dev->usb_ext->usbctl2) & 2857 ~BIT(LTM_ENABLE), 2858 &dev->usb_ext->usbctl2); 2859 allow_status_338x(ep); 2860 goto next_endpoints3; 2861 2862 default: 2863 break; 2864 } 2865 } 2866 if (w_value == USB_DEVICE_REMOTE_WAKEUP) { 2867 dev->wakeup_enable = 0; 2868 writel(readl(&dev->usb->usbctl) & 2869 ~BIT(DEVICE_REMOTE_WAKEUP_ENABLE), 2870 &dev->usb->usbctl); 2871 allow_status_338x(ep); 2872 break; 2873 } 2874 goto usb3_delegate; 2875 2876 case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_ENDPOINT): 2877 e = get_ep_by_addr(dev, w_index); 2878 if (!e) 2879 goto do_stall3; 2880 if (w_value != USB_ENDPOINT_HALT) 2881 goto do_stall3; 2882 ep_vdbg(dev, "%s clear halt\n", e->ep.name); 2883 /* 2884 * Workaround for SS SeqNum not cleared via 2885 * Endpoint Halt (Clear) bit. select endpoint 2886 */ 2887 ep_clear_seqnum(e); 2888 clear_halt(e); 2889 if (!list_empty(&e->queue) && e->td_dma) 2890 restart_dma(e); 2891 allow_status(ep); 2892 ep->stopped = 1; 2893 break; 2894 2895 default: 2896 goto usb3_delegate; 2897 } 2898 break; 2899 case USB_REQ_SET_FEATURE: 2900 switch (r.bRequestType) { 2901 case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE): 2902 if (!dev->addressed_state) { 2903 switch (w_value) { 2904 case USB_DEVICE_U1_ENABLE: 2905 dev->u1_enable = 1; 2906 writel(readl(&dev->usb_ext->usbctl2) | 2907 BIT(U1_ENABLE), 2908 &dev->usb_ext->usbctl2); 2909 allow_status_338x(ep); 2910 goto next_endpoints3; 2911 2912 case USB_DEVICE_U2_ENABLE: 2913 dev->u2_enable = 1; 2914 writel(readl(&dev->usb_ext->usbctl2) | 2915 BIT(U2_ENABLE), 2916 &dev->usb_ext->usbctl2); 2917 allow_status_338x(ep); 2918 goto next_endpoints3; 2919 2920 case USB_DEVICE_LTM_ENABLE: 2921 dev->ltm_enable = 1; 2922 writel(readl(&dev->usb_ext->usbctl2) | 2923 BIT(LTM_ENABLE), 2924 &dev->usb_ext->usbctl2); 2925 allow_status_338x(ep); 2926 goto next_endpoints3; 2927 default: 2928 break; 2929 } 2930 } 2931 2932 if (w_value == USB_DEVICE_REMOTE_WAKEUP) { 2933 dev->wakeup_enable = 1; 2934 writel(readl(&dev->usb->usbctl) | 2935 BIT(DEVICE_REMOTE_WAKEUP_ENABLE), 2936 &dev->usb->usbctl); 2937 allow_status_338x(ep); 2938 break; 2939 } 2940 goto usb3_delegate; 2941 2942 case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_ENDPOINT): 2943 e = get_ep_by_addr(dev, w_index); 2944 if (!e || (w_value != USB_ENDPOINT_HALT)) 2945 goto do_stall3; 2946 ep->stopped = 1; 2947 if (ep->num == 0) 2948 ep->dev->protocol_stall = 1; 2949 else { 2950 if (ep->dma) 2951 abort_dma(ep); 2952 set_halt(ep); 2953 } 2954 allow_status_338x(ep); 2955 break; 2956 2957 default: 2958 goto usb3_delegate; 2959 } 2960 2961 break; 2962 default: 2963 2964 usb3_delegate: 2965 ep_vdbg(dev, "setup %02x.%02x v%04x i%04x l%04x ep_cfg %08x\n", 2966 r.bRequestType, r.bRequest, 2967 w_value, w_index, w_length, 2968 readl(&ep->cfg->ep_cfg)); 2969 2970 ep->responded = 0; 2971 spin_unlock(&dev->lock); 2972 tmp = dev->driver->setup(&dev->gadget, &r); 2973 spin_lock(&dev->lock); 2974 } 2975 do_stall3: 2976 if (tmp < 0) { 2977 ep_vdbg(dev, "req %02x.%02x protocol STALL; stat %d\n", 2978 r.bRequestType, r.bRequest, tmp); 2979 dev->protocol_stall = 1; 2980 /* TD 9.9 Halt Endpoint test. TD 9.22 Set feature test */ 2981 set_halt(ep); 2982 } 2983 2984 next_endpoints3: 2985 2986 #undef w_value 2987 #undef w_index 2988 #undef w_length 2989 2990 return; 2991 } 2992 2993 static void usb338x_handle_ep_intr(struct net2280 *dev, u32 stat0) 2994 { 2995 u32 index; 2996 u32 bit; 2997 2998 for (index = 0; index < ARRAY_SIZE(ep_bit); index++) { 2999 bit = BIT(ep_bit[index]); 3000 3001 if (!stat0) 3002 break; 3003 3004 if (!(stat0 & bit)) 3005 continue; 3006 3007 stat0 &= ~bit; 3008 3009 handle_ep_small(&dev->ep[index]); 3010 } 3011 } 3012 3013 static void handle_stat0_irqs(struct net2280 *dev, u32 stat) 3014 { 3015 struct net2280_ep *ep; 3016 u32 num, scratch; 3017 3018 /* most of these don't need individual acks */ 3019 stat &= ~BIT(INTA_ASSERTED); 3020 if (!stat) 3021 return; 3022 /* ep_dbg(dev, "irqstat0 %04x\n", stat); */ 3023 3024 /* starting a control request? */ 3025 if (unlikely(stat & BIT(SETUP_PACKET_INTERRUPT))) { 3026 union { 3027 u32 raw[2]; 3028 struct usb_ctrlrequest r; 3029 } u; 3030 int tmp; 3031 struct net2280_request *req; 3032 3033 if (dev->gadget.speed == USB_SPEED_UNKNOWN) { 3034 u32 val = readl(&dev->usb->usbstat); 3035 if (val & BIT(SUPER_SPEED)) { 3036 dev->gadget.speed = USB_SPEED_SUPER; 3037 usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 3038 EP0_SS_MAX_PACKET_SIZE); 3039 } else if (val & BIT(HIGH_SPEED)) { 3040 dev->gadget.speed = USB_SPEED_HIGH; 3041 usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 3042 EP0_HS_MAX_PACKET_SIZE); 3043 } else { 3044 dev->gadget.speed = USB_SPEED_FULL; 3045 usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 3046 EP0_HS_MAX_PACKET_SIZE); 3047 } 3048 net2280_led_speed(dev, dev->gadget.speed); 3049 ep_dbg(dev, "%s\n", 3050 usb_speed_string(dev->gadget.speed)); 3051 } 3052 3053 ep = &dev->ep[0]; 3054 ep->irqs++; 3055 3056 /* make sure any leftover request state is cleared */ 3057 stat &= ~BIT(ENDPOINT_0_INTERRUPT); 3058 while (!list_empty(&ep->queue)) { 3059 req = list_entry(ep->queue.next, 3060 struct net2280_request, queue); 3061 done(ep, req, (req->req.actual == req->req.length) 3062 ? 0 : -EPROTO); 3063 } 3064 ep->stopped = 0; 3065 dev->protocol_stall = 0; 3066 if (!(dev->quirks & PLX_SUPERSPEED)) { 3067 if (ep->dev->quirks & PLX_2280) 3068 tmp = BIT(FIFO_OVERFLOW) | 3069 BIT(FIFO_UNDERFLOW); 3070 else 3071 tmp = 0; 3072 3073 writel(tmp | BIT(TIMEOUT) | 3074 BIT(USB_STALL_SENT) | 3075 BIT(USB_IN_NAK_SENT) | 3076 BIT(USB_IN_ACK_RCVD) | 3077 BIT(USB_OUT_PING_NAK_SENT) | 3078 BIT(USB_OUT_ACK_SENT) | 3079 BIT(SHORT_PACKET_OUT_DONE_INTERRUPT) | 3080 BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT) | 3081 BIT(DATA_PACKET_RECEIVED_INTERRUPT) | 3082 BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) | 3083 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | 3084 BIT(DATA_IN_TOKEN_INTERRUPT), 3085 &ep->regs->ep_stat); 3086 } 3087 u.raw[0] = readl(&dev->usb->setup0123); 3088 u.raw[1] = readl(&dev->usb->setup4567); 3089 3090 cpu_to_le32s(&u.raw[0]); 3091 cpu_to_le32s(&u.raw[1]); 3092 3093 if ((dev->quirks & PLX_SUPERSPEED) && !dev->bug7734_patched) 3094 defect7374_workaround(dev, u.r); 3095 3096 tmp = 0; 3097 3098 #define w_value le16_to_cpu(u.r.wValue) 3099 #define w_index le16_to_cpu(u.r.wIndex) 3100 #define w_length le16_to_cpu(u.r.wLength) 3101 3102 /* ack the irq */ 3103 writel(BIT(SETUP_PACKET_INTERRUPT), &dev->regs->irqstat0); 3104 stat ^= BIT(SETUP_PACKET_INTERRUPT); 3105 3106 /* watch control traffic at the token level, and force 3107 * synchronization before letting the status stage happen. 3108 * FIXME ignore tokens we'll NAK, until driver responds. 3109 * that'll mean a lot less irqs for some drivers. 3110 */ 3111 ep->is_in = (u.r.bRequestType & USB_DIR_IN) != 0; 3112 if (ep->is_in) { 3113 scratch = BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) | 3114 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | 3115 BIT(DATA_IN_TOKEN_INTERRUPT); 3116 stop_out_naking(ep); 3117 } else 3118 scratch = BIT(DATA_PACKET_RECEIVED_INTERRUPT) | 3119 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | 3120 BIT(DATA_IN_TOKEN_INTERRUPT); 3121 writel(scratch, &dev->epregs[0].ep_irqenb); 3122 3123 /* we made the hardware handle most lowlevel requests; 3124 * everything else goes uplevel to the gadget code. 3125 */ 3126 ep->responded = 1; 3127 3128 if (dev->gadget.speed == USB_SPEED_SUPER) { 3129 handle_stat0_irqs_superspeed(dev, ep, u.r); 3130 goto next_endpoints; 3131 } 3132 3133 switch (u.r.bRequest) { 3134 case USB_REQ_GET_STATUS: { 3135 struct net2280_ep *e; 3136 __le32 status; 3137 3138 /* hw handles device and interface status */ 3139 if (u.r.bRequestType != (USB_DIR_IN|USB_RECIP_ENDPOINT)) 3140 goto delegate; 3141 e = get_ep_by_addr(dev, w_index); 3142 if (!e || w_length > 2) 3143 goto do_stall; 3144 3145 if (readl(&e->regs->ep_rsp) & BIT(SET_ENDPOINT_HALT)) 3146 status = cpu_to_le32(1); 3147 else 3148 status = cpu_to_le32(0); 3149 3150 /* don't bother with a request object! */ 3151 writel(0, &dev->epregs[0].ep_irqenb); 3152 set_fifo_bytecount(ep, w_length); 3153 writel((__force u32)status, &dev->epregs[0].ep_data); 3154 allow_status(ep); 3155 ep_vdbg(dev, "%s stat %02x\n", ep->ep.name, status); 3156 goto next_endpoints; 3157 } 3158 break; 3159 case USB_REQ_CLEAR_FEATURE: { 3160 struct net2280_ep *e; 3161 3162 /* hw handles device features */ 3163 if (u.r.bRequestType != USB_RECIP_ENDPOINT) 3164 goto delegate; 3165 if (w_value != USB_ENDPOINT_HALT || w_length != 0) 3166 goto do_stall; 3167 e = get_ep_by_addr(dev, w_index); 3168 if (!e) 3169 goto do_stall; 3170 if (e->wedged) { 3171 ep_vdbg(dev, "%s wedged, halt not cleared\n", 3172 ep->ep.name); 3173 } else { 3174 ep_vdbg(dev, "%s clear halt\n", e->ep.name); 3175 clear_halt(e); 3176 if ((ep->dev->quirks & PLX_SUPERSPEED) && 3177 !list_empty(&e->queue) && e->td_dma) 3178 restart_dma(e); 3179 } 3180 allow_status(ep); 3181 goto next_endpoints; 3182 } 3183 break; 3184 case USB_REQ_SET_FEATURE: { 3185 struct net2280_ep *e; 3186 3187 /* hw handles device features */ 3188 if (u.r.bRequestType != USB_RECIP_ENDPOINT) 3189 goto delegate; 3190 if (w_value != USB_ENDPOINT_HALT || w_length != 0) 3191 goto do_stall; 3192 e = get_ep_by_addr(dev, w_index); 3193 if (!e) 3194 goto do_stall; 3195 if (e->ep.name == ep0name) 3196 goto do_stall; 3197 set_halt(e); 3198 if ((dev->quirks & PLX_SUPERSPEED) && e->dma) 3199 abort_dma(e); 3200 allow_status(ep); 3201 ep_vdbg(dev, "%s set halt\n", ep->ep.name); 3202 goto next_endpoints; 3203 } 3204 break; 3205 default: 3206 delegate: 3207 ep_vdbg(dev, "setup %02x.%02x v%04x i%04x l%04x " 3208 "ep_cfg %08x\n", 3209 u.r.bRequestType, u.r.bRequest, 3210 w_value, w_index, w_length, 3211 readl(&ep->cfg->ep_cfg)); 3212 ep->responded = 0; 3213 spin_unlock(&dev->lock); 3214 tmp = dev->driver->setup(&dev->gadget, &u.r); 3215 spin_lock(&dev->lock); 3216 } 3217 3218 /* stall ep0 on error */ 3219 if (tmp < 0) { 3220 do_stall: 3221 ep_vdbg(dev, "req %02x.%02x protocol STALL; stat %d\n", 3222 u.r.bRequestType, u.r.bRequest, tmp); 3223 dev->protocol_stall = 1; 3224 } 3225 3226 /* some in/out token irq should follow; maybe stall then. 3227 * driver must queue a request (even zlp) or halt ep0 3228 * before the host times out. 3229 */ 3230 } 3231 3232 #undef w_value 3233 #undef w_index 3234 #undef w_length 3235 3236 next_endpoints: 3237 if ((dev->quirks & PLX_SUPERSPEED) && dev->enhanced_mode) { 3238 u32 mask = (BIT(ENDPOINT_0_INTERRUPT) | 3239 USB3380_IRQSTAT0_EP_INTR_MASK_IN | 3240 USB3380_IRQSTAT0_EP_INTR_MASK_OUT); 3241 3242 if (stat & mask) { 3243 usb338x_handle_ep_intr(dev, stat & mask); 3244 stat &= ~mask; 3245 } 3246 } else { 3247 /* endpoint data irq ? */ 3248 scratch = stat & 0x7f; 3249 stat &= ~0x7f; 3250 for (num = 0; scratch; num++) { 3251 u32 t; 3252 3253 /* do this endpoint's FIFO and queue need tending? */ 3254 t = BIT(num); 3255 if ((scratch & t) == 0) 3256 continue; 3257 scratch ^= t; 3258 3259 ep = &dev->ep[num]; 3260 handle_ep_small(ep); 3261 } 3262 } 3263 3264 if (stat) 3265 ep_dbg(dev, "unhandled irqstat0 %08x\n", stat); 3266 } 3267 3268 #define DMA_INTERRUPTS (BIT(DMA_D_INTERRUPT) | \ 3269 BIT(DMA_C_INTERRUPT) | \ 3270 BIT(DMA_B_INTERRUPT) | \ 3271 BIT(DMA_A_INTERRUPT)) 3272 #define PCI_ERROR_INTERRUPTS ( \ 3273 BIT(PCI_MASTER_ABORT_RECEIVED_INTERRUPT) | \ 3274 BIT(PCI_TARGET_ABORT_RECEIVED_INTERRUPT) | \ 3275 BIT(PCI_RETRY_ABORT_INTERRUPT)) 3276 3277 static void handle_stat1_irqs(struct net2280 *dev, u32 stat) 3278 __releases(dev->lock) 3279 __acquires(dev->lock) 3280 { 3281 struct net2280_ep *ep; 3282 u32 tmp, num, mask, scratch; 3283 3284 /* after disconnect there's nothing else to do! */ 3285 tmp = BIT(VBUS_INTERRUPT) | BIT(ROOT_PORT_RESET_INTERRUPT); 3286 mask = BIT(SUPER_SPEED) | BIT(HIGH_SPEED) | BIT(FULL_SPEED); 3287 3288 /* VBUS disconnect is indicated by VBUS_PIN and VBUS_INTERRUPT set. 3289 * Root Port Reset is indicated by ROOT_PORT_RESET_INTERRUPT set and 3290 * both HIGH_SPEED and FULL_SPEED clear (as ROOT_PORT_RESET_INTERRUPT 3291 * only indicates a change in the reset state). 3292 */ 3293 if (stat & tmp) { 3294 bool reset = false; 3295 bool disconnect = false; 3296 3297 /* 3298 * Ignore disconnects and resets if the speed hasn't been set. 3299 * VBUS can bounce and there's always an initial reset. 3300 */ 3301 writel(tmp, &dev->regs->irqstat1); 3302 if (dev->gadget.speed != USB_SPEED_UNKNOWN) { 3303 if ((stat & BIT(VBUS_INTERRUPT)) && 3304 (readl(&dev->usb->usbctl) & 3305 BIT(VBUS_PIN)) == 0) { 3306 disconnect = true; 3307 ep_dbg(dev, "disconnect %s\n", 3308 dev->driver->driver.name); 3309 } else if ((stat & BIT(ROOT_PORT_RESET_INTERRUPT)) && 3310 (readl(&dev->usb->usbstat) & mask) 3311 == 0) { 3312 reset = true; 3313 ep_dbg(dev, "reset %s\n", 3314 dev->driver->driver.name); 3315 } 3316 3317 if (disconnect || reset) { 3318 stop_activity(dev, dev->driver); 3319 ep0_start(dev); 3320 spin_unlock(&dev->lock); 3321 if (reset) 3322 usb_gadget_udc_reset 3323 (&dev->gadget, dev->driver); 3324 else 3325 (dev->driver->disconnect) 3326 (&dev->gadget); 3327 spin_lock(&dev->lock); 3328 return; 3329 } 3330 } 3331 stat &= ~tmp; 3332 3333 /* vBUS can bounce ... one of many reasons to ignore the 3334 * notion of hotplug events on bus connect/disconnect! 3335 */ 3336 if (!stat) 3337 return; 3338 } 3339 3340 /* NOTE: chip stays in PCI D0 state for now, but it could 3341 * enter D1 to save more power 3342 */ 3343 tmp = BIT(SUSPEND_REQUEST_CHANGE_INTERRUPT); 3344 if (stat & tmp) { 3345 writel(tmp, &dev->regs->irqstat1); 3346 if (stat & BIT(SUSPEND_REQUEST_INTERRUPT)) { 3347 if (dev->driver->suspend) 3348 dev->driver->suspend(&dev->gadget); 3349 if (!enable_suspend) 3350 stat &= ~BIT(SUSPEND_REQUEST_INTERRUPT); 3351 } else { 3352 if (dev->driver->resume) 3353 dev->driver->resume(&dev->gadget); 3354 /* at high speed, note erratum 0133 */ 3355 } 3356 stat &= ~tmp; 3357 } 3358 3359 /* clear any other status/irqs */ 3360 if (stat) 3361 writel(stat, &dev->regs->irqstat1); 3362 3363 /* some status we can just ignore */ 3364 if (dev->quirks & PLX_2280) 3365 stat &= ~(BIT(CONTROL_STATUS_INTERRUPT) | 3366 BIT(SUSPEND_REQUEST_INTERRUPT) | 3367 BIT(RESUME_INTERRUPT) | 3368 BIT(SOF_INTERRUPT)); 3369 else 3370 stat &= ~(BIT(CONTROL_STATUS_INTERRUPT) | 3371 BIT(RESUME_INTERRUPT) | 3372 BIT(SOF_DOWN_INTERRUPT) | 3373 BIT(SOF_INTERRUPT)); 3374 3375 if (!stat) 3376 return; 3377 /* ep_dbg(dev, "irqstat1 %08x\n", stat);*/ 3378 3379 /* DMA status, for ep-{a,b,c,d} */ 3380 scratch = stat & DMA_INTERRUPTS; 3381 stat &= ~DMA_INTERRUPTS; 3382 scratch >>= 9; 3383 for (num = 0; scratch; num++) { 3384 struct net2280_dma_regs __iomem *dma; 3385 3386 tmp = BIT(num); 3387 if ((tmp & scratch) == 0) 3388 continue; 3389 scratch ^= tmp; 3390 3391 ep = &dev->ep[num + 1]; 3392 dma = ep->dma; 3393 3394 if (!dma) 3395 continue; 3396 3397 /* clear ep's dma status */ 3398 tmp = readl(&dma->dmastat); 3399 writel(tmp, &dma->dmastat); 3400 3401 /* dma sync*/ 3402 if (dev->quirks & PLX_SUPERSPEED) { 3403 u32 r_dmacount = readl(&dma->dmacount); 3404 if (!ep->is_in && (r_dmacount & 0x00FFFFFF) && 3405 (tmp & BIT(DMA_TRANSACTION_DONE_INTERRUPT))) 3406 continue; 3407 } 3408 3409 if (!(tmp & BIT(DMA_TRANSACTION_DONE_INTERRUPT))) { 3410 ep_dbg(ep->dev, "%s no xact done? %08x\n", 3411 ep->ep.name, tmp); 3412 continue; 3413 } 3414 stop_dma(ep->dma); 3415 3416 /* OUT transfers terminate when the data from the 3417 * host is in our memory. Process whatever's done. 3418 * On this path, we know transfer's last packet wasn't 3419 * less than req->length. NAK_OUT_PACKETS may be set, 3420 * or the FIFO may already be holding new packets. 3421 * 3422 * IN transfers can linger in the FIFO for a very 3423 * long time ... we ignore that for now, accounting 3424 * precisely (like PIO does) needs per-packet irqs 3425 */ 3426 scan_dma_completions(ep); 3427 3428 /* disable dma on inactive queues; else maybe restart */ 3429 if (!list_empty(&ep->queue)) { 3430 tmp = readl(&dma->dmactl); 3431 restart_dma(ep); 3432 } 3433 ep->irqs++; 3434 } 3435 3436 /* NOTE: there are other PCI errors we might usefully notice. 3437 * if they appear very often, here's where to try recovering. 3438 */ 3439 if (stat & PCI_ERROR_INTERRUPTS) { 3440 ep_err(dev, "pci dma error; stat %08x\n", stat); 3441 stat &= ~PCI_ERROR_INTERRUPTS; 3442 /* these are fatal errors, but "maybe" they won't 3443 * happen again ... 3444 */ 3445 stop_activity(dev, dev->driver); 3446 ep0_start(dev); 3447 stat = 0; 3448 } 3449 3450 if (stat) 3451 ep_dbg(dev, "unhandled irqstat1 %08x\n", stat); 3452 } 3453 3454 static irqreturn_t net2280_irq(int irq, void *_dev) 3455 { 3456 struct net2280 *dev = _dev; 3457 3458 /* shared interrupt, not ours */ 3459 if ((dev->quirks & PLX_LEGACY) && 3460 (!(readl(&dev->regs->irqstat0) & BIT(INTA_ASSERTED)))) 3461 return IRQ_NONE; 3462 3463 spin_lock(&dev->lock); 3464 3465 /* handle disconnect, dma, and more */ 3466 handle_stat1_irqs(dev, readl(&dev->regs->irqstat1)); 3467 3468 /* control requests and PIO */ 3469 handle_stat0_irqs(dev, readl(&dev->regs->irqstat0)); 3470 3471 if (dev->quirks & PLX_SUPERSPEED) { 3472 /* re-enable interrupt to trigger any possible new interrupt */ 3473 u32 pciirqenb1 = readl(&dev->regs->pciirqenb1); 3474 writel(pciirqenb1 & 0x7FFFFFFF, &dev->regs->pciirqenb1); 3475 writel(pciirqenb1, &dev->regs->pciirqenb1); 3476 } 3477 3478 spin_unlock(&dev->lock); 3479 3480 return IRQ_HANDLED; 3481 } 3482 3483 /*-------------------------------------------------------------------------*/ 3484 3485 static void gadget_release(struct device *_dev) 3486 { 3487 struct net2280 *dev = dev_get_drvdata(_dev); 3488 3489 kfree(dev); 3490 } 3491 3492 /* tear down the binding between this driver and the pci device */ 3493 3494 static void net2280_remove(struct pci_dev *pdev) 3495 { 3496 struct net2280 *dev = pci_get_drvdata(pdev); 3497 3498 usb_del_gadget_udc(&dev->gadget); 3499 3500 BUG_ON(dev->driver); 3501 3502 /* then clean up the resources we allocated during probe() */ 3503 net2280_led_shutdown(dev); 3504 if (dev->requests) { 3505 int i; 3506 for (i = 1; i < 5; i++) { 3507 if (!dev->ep[i].dummy) 3508 continue; 3509 pci_pool_free(dev->requests, dev->ep[i].dummy, 3510 dev->ep[i].td_dma); 3511 } 3512 pci_pool_destroy(dev->requests); 3513 } 3514 if (dev->got_irq) 3515 free_irq(pdev->irq, dev); 3516 if (dev->quirks & PLX_SUPERSPEED) 3517 pci_disable_msi(pdev); 3518 if (dev->regs) 3519 iounmap(dev->regs); 3520 if (dev->region) 3521 release_mem_region(pci_resource_start(pdev, 0), 3522 pci_resource_len(pdev, 0)); 3523 if (dev->enabled) 3524 pci_disable_device(pdev); 3525 device_remove_file(&pdev->dev, &dev_attr_registers); 3526 3527 ep_info(dev, "unbind\n"); 3528 } 3529 3530 /* wrap this driver around the specified device, but 3531 * don't respond over USB until a gadget driver binds to us. 3532 */ 3533 3534 static int net2280_probe(struct pci_dev *pdev, const struct pci_device_id *id) 3535 { 3536 struct net2280 *dev; 3537 unsigned long resource, len; 3538 void __iomem *base = NULL; 3539 int retval, i; 3540 3541 /* alloc, and start init */ 3542 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 3543 if (dev == NULL) { 3544 retval = -ENOMEM; 3545 goto done; 3546 } 3547 3548 pci_set_drvdata(pdev, dev); 3549 spin_lock_init(&dev->lock); 3550 dev->quirks = id->driver_data; 3551 dev->pdev = pdev; 3552 dev->gadget.ops = &net2280_ops; 3553 dev->gadget.max_speed = (dev->quirks & PLX_SUPERSPEED) ? 3554 USB_SPEED_SUPER : USB_SPEED_HIGH; 3555 3556 /* the "gadget" abstracts/virtualizes the controller */ 3557 dev->gadget.name = driver_name; 3558 3559 /* now all the pci goodies ... */ 3560 if (pci_enable_device(pdev) < 0) { 3561 retval = -ENODEV; 3562 goto done; 3563 } 3564 dev->enabled = 1; 3565 3566 /* BAR 0 holds all the registers 3567 * BAR 1 is 8051 memory; unused here (note erratum 0103) 3568 * BAR 2 is fifo memory; unused here 3569 */ 3570 resource = pci_resource_start(pdev, 0); 3571 len = pci_resource_len(pdev, 0); 3572 if (!request_mem_region(resource, len, driver_name)) { 3573 ep_dbg(dev, "controller already in use\n"); 3574 retval = -EBUSY; 3575 goto done; 3576 } 3577 dev->region = 1; 3578 3579 /* FIXME provide firmware download interface to put 3580 * 8051 code into the chip, e.g. to turn on PCI PM. 3581 */ 3582 3583 base = ioremap_nocache(resource, len); 3584 if (base == NULL) { 3585 ep_dbg(dev, "can't map memory\n"); 3586 retval = -EFAULT; 3587 goto done; 3588 } 3589 dev->regs = (struct net2280_regs __iomem *) base; 3590 dev->usb = (struct net2280_usb_regs __iomem *) (base + 0x0080); 3591 dev->pci = (struct net2280_pci_regs __iomem *) (base + 0x0100); 3592 dev->dma = (struct net2280_dma_regs __iomem *) (base + 0x0180); 3593 dev->dep = (struct net2280_dep_regs __iomem *) (base + 0x0200); 3594 dev->epregs = (struct net2280_ep_regs __iomem *) (base + 0x0300); 3595 3596 if (dev->quirks & PLX_SUPERSPEED) { 3597 u32 fsmvalue; 3598 u32 usbstat; 3599 dev->usb_ext = (struct usb338x_usb_ext_regs __iomem *) 3600 (base + 0x00b4); 3601 dev->llregs = (struct usb338x_ll_regs __iomem *) 3602 (base + 0x0700); 3603 dev->ll_lfps_regs = (struct usb338x_ll_lfps_regs __iomem *) 3604 (base + 0x0748); 3605 dev->ll_tsn_regs = (struct usb338x_ll_tsn_regs __iomem *) 3606 (base + 0x077c); 3607 dev->ll_chicken_reg = (struct usb338x_ll_chi_regs __iomem *) 3608 (base + 0x079c); 3609 dev->plregs = (struct usb338x_pl_regs __iomem *) 3610 (base + 0x0800); 3611 usbstat = readl(&dev->usb->usbstat); 3612 dev->enhanced_mode = !!(usbstat & BIT(11)); 3613 dev->n_ep = (dev->enhanced_mode) ? 9 : 5; 3614 /* put into initial config, link up all endpoints */ 3615 fsmvalue = get_idx_reg(dev->regs, SCRATCH) & 3616 (0xf << DEFECT7374_FSM_FIELD); 3617 /* See if firmware needs to set up for workaround: */ 3618 if (fsmvalue == DEFECT7374_FSM_SS_CONTROL_READ) { 3619 dev->bug7734_patched = 1; 3620 writel(0, &dev->usb->usbctl); 3621 } else 3622 dev->bug7734_patched = 0; 3623 } else { 3624 dev->enhanced_mode = 0; 3625 dev->n_ep = 7; 3626 /* put into initial config, link up all endpoints */ 3627 writel(0, &dev->usb->usbctl); 3628 } 3629 3630 usb_reset(dev); 3631 usb_reinit(dev); 3632 3633 /* irq setup after old hardware is cleaned up */ 3634 if (!pdev->irq) { 3635 ep_err(dev, "No IRQ. Check PCI setup!\n"); 3636 retval = -ENODEV; 3637 goto done; 3638 } 3639 3640 if (dev->quirks & PLX_SUPERSPEED) 3641 if (pci_enable_msi(pdev)) 3642 ep_err(dev, "Failed to enable MSI mode\n"); 3643 3644 if (request_irq(pdev->irq, net2280_irq, IRQF_SHARED, 3645 driver_name, dev)) { 3646 ep_err(dev, "request interrupt %d failed\n", pdev->irq); 3647 retval = -EBUSY; 3648 goto done; 3649 } 3650 dev->got_irq = 1; 3651 3652 /* DMA setup */ 3653 /* NOTE: we know only the 32 LSBs of dma addresses may be nonzero */ 3654 dev->requests = pci_pool_create("requests", pdev, 3655 sizeof(struct net2280_dma), 3656 0 /* no alignment requirements */, 3657 0 /* or page-crossing issues */); 3658 if (!dev->requests) { 3659 ep_dbg(dev, "can't get request pool\n"); 3660 retval = -ENOMEM; 3661 goto done; 3662 } 3663 for (i = 1; i < 5; i++) { 3664 struct net2280_dma *td; 3665 3666 td = pci_pool_alloc(dev->requests, GFP_KERNEL, 3667 &dev->ep[i].td_dma); 3668 if (!td) { 3669 ep_dbg(dev, "can't get dummy %d\n", i); 3670 retval = -ENOMEM; 3671 goto done; 3672 } 3673 td->dmacount = 0; /* not VALID */ 3674 td->dmadesc = td->dmaaddr; 3675 dev->ep[i].dummy = td; 3676 } 3677 3678 /* enable lower-overhead pci memory bursts during DMA */ 3679 if (dev->quirks & PLX_LEGACY) 3680 writel(BIT(DMA_MEMORY_WRITE_AND_INVALIDATE_ENABLE) | 3681 /* 3682 * 256 write retries may not be enough... 3683 BIT(PCI_RETRY_ABORT_ENABLE) | 3684 */ 3685 BIT(DMA_READ_MULTIPLE_ENABLE) | 3686 BIT(DMA_READ_LINE_ENABLE), 3687 &dev->pci->pcimstctl); 3688 /* erratum 0115 shouldn't appear: Linux inits PCI_LATENCY_TIMER */ 3689 pci_set_master(pdev); 3690 pci_try_set_mwi(pdev); 3691 3692 /* ... also flushes any posted pci writes */ 3693 dev->chiprev = get_idx_reg(dev->regs, REG_CHIPREV) & 0xffff; 3694 3695 /* done */ 3696 ep_info(dev, "%s\n", driver_desc); 3697 ep_info(dev, "irq %d, pci mem %p, chip rev %04x\n", 3698 pdev->irq, base, dev->chiprev); 3699 ep_info(dev, "version: " DRIVER_VERSION "; %s\n", 3700 dev->enhanced_mode ? "enhanced mode" : "legacy mode"); 3701 retval = device_create_file(&pdev->dev, &dev_attr_registers); 3702 if (retval) 3703 goto done; 3704 3705 retval = usb_add_gadget_udc_release(&pdev->dev, &dev->gadget, 3706 gadget_release); 3707 if (retval) 3708 goto done; 3709 return 0; 3710 3711 done: 3712 if (dev) 3713 net2280_remove(pdev); 3714 return retval; 3715 } 3716 3717 /* make sure the board is quiescent; otherwise it will continue 3718 * generating IRQs across the upcoming reboot. 3719 */ 3720 3721 static void net2280_shutdown(struct pci_dev *pdev) 3722 { 3723 struct net2280 *dev = pci_get_drvdata(pdev); 3724 3725 /* disable IRQs */ 3726 writel(0, &dev->regs->pciirqenb0); 3727 writel(0, &dev->regs->pciirqenb1); 3728 3729 /* disable the pullup so the host will think we're gone */ 3730 writel(0, &dev->usb->usbctl); 3731 3732 } 3733 3734 3735 /*-------------------------------------------------------------------------*/ 3736 3737 static const struct pci_device_id pci_ids[] = { { 3738 .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), 3739 .class_mask = ~0, 3740 .vendor = PCI_VENDOR_ID_PLX_LEGACY, 3741 .device = 0x2280, 3742 .subvendor = PCI_ANY_ID, 3743 .subdevice = PCI_ANY_ID, 3744 .driver_data = PLX_LEGACY | PLX_2280, 3745 }, { 3746 .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), 3747 .class_mask = ~0, 3748 .vendor = PCI_VENDOR_ID_PLX_LEGACY, 3749 .device = 0x2282, 3750 .subvendor = PCI_ANY_ID, 3751 .subdevice = PCI_ANY_ID, 3752 .driver_data = PLX_LEGACY, 3753 }, 3754 { 3755 .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), 3756 .class_mask = ~0, 3757 .vendor = PCI_VENDOR_ID_PLX, 3758 .device = 0x3380, 3759 .subvendor = PCI_ANY_ID, 3760 .subdevice = PCI_ANY_ID, 3761 .driver_data = PLX_SUPERSPEED, 3762 }, 3763 { 3764 .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), 3765 .class_mask = ~0, 3766 .vendor = PCI_VENDOR_ID_PLX, 3767 .device = 0x3382, 3768 .subvendor = PCI_ANY_ID, 3769 .subdevice = PCI_ANY_ID, 3770 .driver_data = PLX_SUPERSPEED, 3771 }, 3772 { /* end: all zeroes */ } 3773 }; 3774 MODULE_DEVICE_TABLE(pci, pci_ids); 3775 3776 /* pci driver glue; this is a "new style" PCI driver module */ 3777 static struct pci_driver net2280_pci_driver = { 3778 .name = (char *) driver_name, 3779 .id_table = pci_ids, 3780 3781 .probe = net2280_probe, 3782 .remove = net2280_remove, 3783 .shutdown = net2280_shutdown, 3784 3785 /* FIXME add power management support */ 3786 }; 3787 3788 module_pci_driver(net2280_pci_driver); 3789 3790 MODULE_DESCRIPTION(DRIVER_DESC); 3791 MODULE_AUTHOR("David Brownell"); 3792 MODULE_LICENSE("GPL"); 3793