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_PCIE) { 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); 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; 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_PCIE) && 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_PCIE) 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_PCIE) 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 = dma_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: Invalid 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 dma_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_PCIE) 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_PCIE) && 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 int scan_dma_completions(struct net2280_ep *ep) 1141 { 1142 int num_completed = 0; 1143 1144 /* only look at descriptors that were "naturally" retired, 1145 * so fifo and list head state won't matter 1146 */ 1147 while (!list_empty(&ep->queue)) { 1148 struct net2280_request *req; 1149 u32 req_dma_count; 1150 1151 req = list_entry(ep->queue.next, 1152 struct net2280_request, queue); 1153 if (!req->valid) 1154 break; 1155 rmb(); 1156 req_dma_count = le32_to_cpup(&req->td->dmacount); 1157 if ((req_dma_count & BIT(VALID_BIT)) != 0) 1158 break; 1159 1160 /* SHORT_PACKET_TRANSFERRED_INTERRUPT handles "usb-short" 1161 * cases where DMA must be aborted; this code handles 1162 * all non-abort DMA completions. 1163 */ 1164 if (unlikely(req->td->dmadesc == 0)) { 1165 /* paranoia */ 1166 u32 const ep_dmacount = readl(&ep->dma->dmacount); 1167 1168 if (ep_dmacount & DMA_BYTE_COUNT_MASK) 1169 break; 1170 /* single transfer mode */ 1171 dma_done(ep, req, req_dma_count, 0); 1172 num_completed++; 1173 break; 1174 } else if (!ep->is_in && 1175 (req->req.length % ep->ep.maxpacket) && 1176 !(ep->dev->quirks & PLX_PCIE)) { 1177 1178 u32 const ep_stat = readl(&ep->regs->ep_stat); 1179 /* AVOID TROUBLE HERE by not issuing short reads from 1180 * your gadget driver. That helps avoids errata 0121, 1181 * 0122, and 0124; not all cases trigger the warning. 1182 */ 1183 if ((ep_stat & BIT(NAK_OUT_PACKETS)) == 0) { 1184 ep_warn(ep->dev, "%s lost packet sync!\n", 1185 ep->ep.name); 1186 req->req.status = -EOVERFLOW; 1187 } else { 1188 u32 const ep_avail = readl(&ep->regs->ep_avail); 1189 if (ep_avail) { 1190 /* fifo gets flushed later */ 1191 ep->out_overflow = 1; 1192 ep_dbg(ep->dev, 1193 "%s dma, discard %d len %d\n", 1194 ep->ep.name, ep_avail, 1195 req->req.length); 1196 req->req.status = -EOVERFLOW; 1197 } 1198 } 1199 } 1200 dma_done(ep, req, req_dma_count, 0); 1201 num_completed++; 1202 } 1203 1204 return num_completed; 1205 } 1206 1207 static void restart_dma(struct net2280_ep *ep) 1208 { 1209 struct net2280_request *req; 1210 1211 if (ep->stopped) 1212 return; 1213 req = list_entry(ep->queue.next, struct net2280_request, queue); 1214 1215 start_dma(ep, req); 1216 } 1217 1218 static void abort_dma(struct net2280_ep *ep) 1219 { 1220 /* abort the current transfer */ 1221 if (likely(!list_empty(&ep->queue))) { 1222 /* FIXME work around errata 0121, 0122, 0124 */ 1223 writel(BIT(DMA_ABORT), &ep->dma->dmastat); 1224 spin_stop_dma(ep->dma); 1225 } else 1226 stop_dma(ep->dma); 1227 scan_dma_completions(ep); 1228 } 1229 1230 /* dequeue ALL requests */ 1231 static void nuke(struct net2280_ep *ep) 1232 { 1233 struct net2280_request *req; 1234 1235 /* called with spinlock held */ 1236 ep->stopped = 1; 1237 if (ep->dma) 1238 abort_dma(ep); 1239 while (!list_empty(&ep->queue)) { 1240 req = list_entry(ep->queue.next, 1241 struct net2280_request, 1242 queue); 1243 done(ep, req, -ESHUTDOWN); 1244 } 1245 } 1246 1247 /* dequeue JUST ONE request */ 1248 static int net2280_dequeue(struct usb_ep *_ep, struct usb_request *_req) 1249 { 1250 struct net2280_ep *ep; 1251 struct net2280_request *req; 1252 unsigned long flags; 1253 u32 dmactl; 1254 int stopped; 1255 1256 ep = container_of(_ep, struct net2280_ep, ep); 1257 if (!_ep || (!ep->desc && ep->num != 0) || !_req) { 1258 pr_err("%s: Invalid ep=%p or ep->desc or req=%p\n", 1259 __func__, _ep, _req); 1260 return -EINVAL; 1261 } 1262 1263 spin_lock_irqsave(&ep->dev->lock, flags); 1264 stopped = ep->stopped; 1265 1266 /* quiesce dma while we patch the queue */ 1267 dmactl = 0; 1268 ep->stopped = 1; 1269 if (ep->dma) { 1270 dmactl = readl(&ep->dma->dmactl); 1271 /* WARNING erratum 0127 may kick in ... */ 1272 stop_dma(ep->dma); 1273 scan_dma_completions(ep); 1274 } 1275 1276 /* make sure it's still queued on this endpoint */ 1277 list_for_each_entry(req, &ep->queue, queue) { 1278 if (&req->req == _req) 1279 break; 1280 } 1281 if (&req->req != _req) { 1282 spin_unlock_irqrestore(&ep->dev->lock, flags); 1283 dev_err(&ep->dev->pdev->dev, "%s: Request mismatch\n", 1284 __func__); 1285 return -EINVAL; 1286 } 1287 1288 /* queue head may be partially complete. */ 1289 if (ep->queue.next == &req->queue) { 1290 if (ep->dma) { 1291 ep_dbg(ep->dev, "unlink (%s) dma\n", _ep->name); 1292 _req->status = -ECONNRESET; 1293 abort_dma(ep); 1294 if (likely(ep->queue.next == &req->queue)) { 1295 /* NOTE: misreports single-transfer mode*/ 1296 req->td->dmacount = 0; /* invalidate */ 1297 dma_done(ep, req, 1298 readl(&ep->dma->dmacount), 1299 -ECONNRESET); 1300 } 1301 } else { 1302 ep_dbg(ep->dev, "unlink (%s) pio\n", _ep->name); 1303 done(ep, req, -ECONNRESET); 1304 } 1305 req = NULL; 1306 } 1307 1308 if (req) 1309 done(ep, req, -ECONNRESET); 1310 ep->stopped = stopped; 1311 1312 if (ep->dma) { 1313 /* turn off dma on inactive queues */ 1314 if (list_empty(&ep->queue)) 1315 stop_dma(ep->dma); 1316 else if (!ep->stopped) { 1317 /* resume current request, or start new one */ 1318 if (req) 1319 writel(dmactl, &ep->dma->dmactl); 1320 else 1321 start_dma(ep, list_entry(ep->queue.next, 1322 struct net2280_request, queue)); 1323 } 1324 } 1325 1326 spin_unlock_irqrestore(&ep->dev->lock, flags); 1327 return 0; 1328 } 1329 1330 /*-------------------------------------------------------------------------*/ 1331 1332 static int net2280_fifo_status(struct usb_ep *_ep); 1333 1334 static int 1335 net2280_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged) 1336 { 1337 struct net2280_ep *ep; 1338 unsigned long flags; 1339 int retval = 0; 1340 1341 ep = container_of(_ep, struct net2280_ep, ep); 1342 if (!_ep || (!ep->desc && ep->num != 0)) { 1343 pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep); 1344 return -EINVAL; 1345 } 1346 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) { 1347 retval = -ESHUTDOWN; 1348 goto print_err; 1349 } 1350 if (ep->desc /* not ep0 */ && (ep->desc->bmAttributes & 0x03) 1351 == USB_ENDPOINT_XFER_ISOC) { 1352 retval = -EINVAL; 1353 goto print_err; 1354 } 1355 1356 spin_lock_irqsave(&ep->dev->lock, flags); 1357 if (!list_empty(&ep->queue)) { 1358 retval = -EAGAIN; 1359 goto print_unlock; 1360 } else if (ep->is_in && value && net2280_fifo_status(_ep) != 0) { 1361 retval = -EAGAIN; 1362 goto print_unlock; 1363 } else { 1364 ep_vdbg(ep->dev, "%s %s %s\n", _ep->name, 1365 value ? "set" : "clear", 1366 wedged ? "wedge" : "halt"); 1367 /* set/clear, then synch memory views with the device */ 1368 if (value) { 1369 if (ep->num == 0) 1370 ep->dev->protocol_stall = 1; 1371 else 1372 set_halt(ep); 1373 if (wedged) 1374 ep->wedged = 1; 1375 } else { 1376 clear_halt(ep); 1377 if (ep->dev->quirks & PLX_PCIE && 1378 !list_empty(&ep->queue) && ep->td_dma) 1379 restart_dma(ep); 1380 ep->wedged = 0; 1381 } 1382 (void) readl(&ep->regs->ep_rsp); 1383 } 1384 spin_unlock_irqrestore(&ep->dev->lock, flags); 1385 1386 return retval; 1387 1388 print_unlock: 1389 spin_unlock_irqrestore(&ep->dev->lock, flags); 1390 print_err: 1391 dev_err(&ep->dev->pdev->dev, "%s: error=%d\n", __func__, retval); 1392 return retval; 1393 } 1394 1395 static int net2280_set_halt(struct usb_ep *_ep, int value) 1396 { 1397 return net2280_set_halt_and_wedge(_ep, value, 0); 1398 } 1399 1400 static int net2280_set_wedge(struct usb_ep *_ep) 1401 { 1402 if (!_ep || _ep->name == ep0name) { 1403 pr_err("%s: Invalid ep=%p or ep0\n", __func__, _ep); 1404 return -EINVAL; 1405 } 1406 return net2280_set_halt_and_wedge(_ep, 1, 1); 1407 } 1408 1409 static int net2280_fifo_status(struct usb_ep *_ep) 1410 { 1411 struct net2280_ep *ep; 1412 u32 avail; 1413 1414 ep = container_of(_ep, struct net2280_ep, ep); 1415 if (!_ep || (!ep->desc && ep->num != 0)) { 1416 pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep); 1417 return -ENODEV; 1418 } 1419 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) { 1420 dev_err(&ep->dev->pdev->dev, 1421 "%s: Invalid driver=%p or speed=%d\n", 1422 __func__, ep->dev->driver, ep->dev->gadget.speed); 1423 return -ESHUTDOWN; 1424 } 1425 1426 avail = readl(&ep->regs->ep_avail) & (BIT(12) - 1); 1427 if (avail > ep->fifo_size) { 1428 dev_err(&ep->dev->pdev->dev, "%s: Fifo overflow\n", __func__); 1429 return -EOVERFLOW; 1430 } 1431 if (ep->is_in) 1432 avail = ep->fifo_size - avail; 1433 return avail; 1434 } 1435 1436 static void net2280_fifo_flush(struct usb_ep *_ep) 1437 { 1438 struct net2280_ep *ep; 1439 1440 ep = container_of(_ep, struct net2280_ep, ep); 1441 if (!_ep || (!ep->desc && ep->num != 0)) { 1442 pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep); 1443 return; 1444 } 1445 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) { 1446 dev_err(&ep->dev->pdev->dev, 1447 "%s: Invalid driver=%p or speed=%d\n", 1448 __func__, ep->dev->driver, ep->dev->gadget.speed); 1449 return; 1450 } 1451 1452 writel(BIT(FIFO_FLUSH), &ep->regs->ep_stat); 1453 (void) readl(&ep->regs->ep_rsp); 1454 } 1455 1456 static const struct usb_ep_ops net2280_ep_ops = { 1457 .enable = net2280_enable, 1458 .disable = net2280_disable, 1459 1460 .alloc_request = net2280_alloc_request, 1461 .free_request = net2280_free_request, 1462 1463 .queue = net2280_queue, 1464 .dequeue = net2280_dequeue, 1465 1466 .set_halt = net2280_set_halt, 1467 .set_wedge = net2280_set_wedge, 1468 .fifo_status = net2280_fifo_status, 1469 .fifo_flush = net2280_fifo_flush, 1470 }; 1471 1472 /*-------------------------------------------------------------------------*/ 1473 1474 static int net2280_get_frame(struct usb_gadget *_gadget) 1475 { 1476 struct net2280 *dev; 1477 unsigned long flags; 1478 u16 retval; 1479 1480 if (!_gadget) 1481 return -ENODEV; 1482 dev = container_of(_gadget, struct net2280, gadget); 1483 spin_lock_irqsave(&dev->lock, flags); 1484 retval = get_idx_reg(dev->regs, REG_FRAME) & 0x03ff; 1485 spin_unlock_irqrestore(&dev->lock, flags); 1486 return retval; 1487 } 1488 1489 static int net2280_wakeup(struct usb_gadget *_gadget) 1490 { 1491 struct net2280 *dev; 1492 u32 tmp; 1493 unsigned long flags; 1494 1495 if (!_gadget) 1496 return 0; 1497 dev = container_of(_gadget, struct net2280, gadget); 1498 1499 spin_lock_irqsave(&dev->lock, flags); 1500 tmp = readl(&dev->usb->usbctl); 1501 if (tmp & BIT(DEVICE_REMOTE_WAKEUP_ENABLE)) 1502 writel(BIT(GENERATE_RESUME), &dev->usb->usbstat); 1503 spin_unlock_irqrestore(&dev->lock, flags); 1504 1505 /* pci writes may still be posted */ 1506 return 0; 1507 } 1508 1509 static int net2280_set_selfpowered(struct usb_gadget *_gadget, int value) 1510 { 1511 struct net2280 *dev; 1512 u32 tmp; 1513 unsigned long flags; 1514 1515 if (!_gadget) 1516 return 0; 1517 dev = container_of(_gadget, struct net2280, gadget); 1518 1519 spin_lock_irqsave(&dev->lock, flags); 1520 tmp = readl(&dev->usb->usbctl); 1521 if (value) { 1522 tmp |= BIT(SELF_POWERED_STATUS); 1523 _gadget->is_selfpowered = 1; 1524 } else { 1525 tmp &= ~BIT(SELF_POWERED_STATUS); 1526 _gadget->is_selfpowered = 0; 1527 } 1528 writel(tmp, &dev->usb->usbctl); 1529 spin_unlock_irqrestore(&dev->lock, flags); 1530 1531 return 0; 1532 } 1533 1534 static int net2280_pullup(struct usb_gadget *_gadget, int is_on) 1535 { 1536 struct net2280 *dev; 1537 u32 tmp; 1538 unsigned long flags; 1539 1540 if (!_gadget) 1541 return -ENODEV; 1542 dev = container_of(_gadget, struct net2280, gadget); 1543 1544 spin_lock_irqsave(&dev->lock, flags); 1545 tmp = readl(&dev->usb->usbctl); 1546 dev->softconnect = (is_on != 0); 1547 if (is_on) { 1548 ep0_start(dev); 1549 writel(tmp | BIT(USB_DETECT_ENABLE), &dev->usb->usbctl); 1550 } else { 1551 writel(tmp & ~BIT(USB_DETECT_ENABLE), &dev->usb->usbctl); 1552 stop_activity(dev, dev->driver); 1553 } 1554 1555 spin_unlock_irqrestore(&dev->lock, flags); 1556 1557 return 0; 1558 } 1559 1560 static struct usb_ep *net2280_match_ep(struct usb_gadget *_gadget, 1561 struct usb_endpoint_descriptor *desc, 1562 struct usb_ss_ep_comp_descriptor *ep_comp) 1563 { 1564 char name[8]; 1565 struct usb_ep *ep; 1566 1567 if (usb_endpoint_type(desc) == USB_ENDPOINT_XFER_INT) { 1568 /* ep-e, ep-f are PIO with only 64 byte fifos */ 1569 ep = gadget_find_ep_by_name(_gadget, "ep-e"); 1570 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp)) 1571 return ep; 1572 ep = gadget_find_ep_by_name(_gadget, "ep-f"); 1573 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp)) 1574 return ep; 1575 } 1576 1577 /* USB3380: Only first four endpoints have DMA channels. Allocate 1578 * slower interrupt endpoints from PIO hw endpoints, to allow bulk/isoc 1579 * endpoints use DMA hw endpoints. 1580 */ 1581 if (usb_endpoint_type(desc) == USB_ENDPOINT_XFER_INT && 1582 usb_endpoint_dir_in(desc)) { 1583 ep = gadget_find_ep_by_name(_gadget, "ep2in"); 1584 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp)) 1585 return ep; 1586 ep = gadget_find_ep_by_name(_gadget, "ep4in"); 1587 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp)) 1588 return ep; 1589 } else if (usb_endpoint_type(desc) == USB_ENDPOINT_XFER_INT && 1590 !usb_endpoint_dir_in(desc)) { 1591 ep = gadget_find_ep_by_name(_gadget, "ep1out"); 1592 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp)) 1593 return ep; 1594 ep = gadget_find_ep_by_name(_gadget, "ep3out"); 1595 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp)) 1596 return ep; 1597 } else if (usb_endpoint_type(desc) != USB_ENDPOINT_XFER_BULK && 1598 usb_endpoint_dir_in(desc)) { 1599 ep = gadget_find_ep_by_name(_gadget, "ep1in"); 1600 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp)) 1601 return ep; 1602 ep = gadget_find_ep_by_name(_gadget, "ep3in"); 1603 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp)) 1604 return ep; 1605 } else if (usb_endpoint_type(desc) != USB_ENDPOINT_XFER_BULK && 1606 !usb_endpoint_dir_in(desc)) { 1607 ep = gadget_find_ep_by_name(_gadget, "ep2out"); 1608 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp)) 1609 return ep; 1610 ep = gadget_find_ep_by_name(_gadget, "ep4out"); 1611 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp)) 1612 return ep; 1613 } 1614 1615 /* USB3380: use same address for usb and hardware endpoints */ 1616 snprintf(name, sizeof(name), "ep%d%s", usb_endpoint_num(desc), 1617 usb_endpoint_dir_in(desc) ? "in" : "out"); 1618 ep = gadget_find_ep_by_name(_gadget, name); 1619 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp)) 1620 return ep; 1621 1622 return NULL; 1623 } 1624 1625 static int net2280_start(struct usb_gadget *_gadget, 1626 struct usb_gadget_driver *driver); 1627 static int net2280_stop(struct usb_gadget *_gadget); 1628 1629 static const struct usb_gadget_ops net2280_ops = { 1630 .get_frame = net2280_get_frame, 1631 .wakeup = net2280_wakeup, 1632 .set_selfpowered = net2280_set_selfpowered, 1633 .pullup = net2280_pullup, 1634 .udc_start = net2280_start, 1635 .udc_stop = net2280_stop, 1636 .match_ep = net2280_match_ep, 1637 }; 1638 1639 /*-------------------------------------------------------------------------*/ 1640 1641 #ifdef CONFIG_USB_GADGET_DEBUG_FILES 1642 1643 /* FIXME move these into procfs, and use seq_file. 1644 * Sysfs _still_ doesn't behave for arbitrarily sized files, 1645 * and also doesn't help products using this with 2.4 kernels. 1646 */ 1647 1648 /* "function" sysfs attribute */ 1649 static ssize_t function_show(struct device *_dev, struct device_attribute *attr, 1650 char *buf) 1651 { 1652 struct net2280 *dev = dev_get_drvdata(_dev); 1653 1654 if (!dev->driver || !dev->driver->function || 1655 strlen(dev->driver->function) > PAGE_SIZE) 1656 return 0; 1657 return scnprintf(buf, PAGE_SIZE, "%s\n", dev->driver->function); 1658 } 1659 static DEVICE_ATTR_RO(function); 1660 1661 static ssize_t registers_show(struct device *_dev, 1662 struct device_attribute *attr, char *buf) 1663 { 1664 struct net2280 *dev; 1665 char *next; 1666 unsigned size, t; 1667 unsigned long flags; 1668 int i; 1669 u32 t1, t2; 1670 const char *s; 1671 1672 dev = dev_get_drvdata(_dev); 1673 next = buf; 1674 size = PAGE_SIZE; 1675 spin_lock_irqsave(&dev->lock, flags); 1676 1677 if (dev->driver) 1678 s = dev->driver->driver.name; 1679 else 1680 s = "(none)"; 1681 1682 /* Main Control Registers */ 1683 t = scnprintf(next, size, "%s version " DRIVER_VERSION 1684 ", chiprev %04x\n\n" 1685 "devinit %03x fifoctl %08x gadget '%s'\n" 1686 "pci irqenb0 %02x irqenb1 %08x " 1687 "irqstat0 %04x irqstat1 %08x\n", 1688 driver_name, dev->chiprev, 1689 readl(&dev->regs->devinit), 1690 readl(&dev->regs->fifoctl), 1691 s, 1692 readl(&dev->regs->pciirqenb0), 1693 readl(&dev->regs->pciirqenb1), 1694 readl(&dev->regs->irqstat0), 1695 readl(&dev->regs->irqstat1)); 1696 size -= t; 1697 next += t; 1698 1699 /* USB Control Registers */ 1700 t1 = readl(&dev->usb->usbctl); 1701 t2 = readl(&dev->usb->usbstat); 1702 if (t1 & BIT(VBUS_PIN)) { 1703 if (t2 & BIT(HIGH_SPEED)) 1704 s = "high speed"; 1705 else if (dev->gadget.speed == USB_SPEED_UNKNOWN) 1706 s = "powered"; 1707 else 1708 s = "full speed"; 1709 /* full speed bit (6) not working?? */ 1710 } else 1711 s = "not attached"; 1712 t = scnprintf(next, size, 1713 "stdrsp %08x usbctl %08x usbstat %08x " 1714 "addr 0x%02x (%s)\n", 1715 readl(&dev->usb->stdrsp), t1, t2, 1716 readl(&dev->usb->ouraddr), s); 1717 size -= t; 1718 next += t; 1719 1720 /* PCI Master Control Registers */ 1721 1722 /* DMA Control Registers */ 1723 1724 /* Configurable EP Control Registers */ 1725 for (i = 0; i < dev->n_ep; i++) { 1726 struct net2280_ep *ep; 1727 1728 ep = &dev->ep[i]; 1729 if (i && !ep->desc) 1730 continue; 1731 1732 t1 = readl(&ep->cfg->ep_cfg); 1733 t2 = readl(&ep->regs->ep_rsp) & 0xff; 1734 t = scnprintf(next, size, 1735 "\n%s\tcfg %05x rsp (%02x) %s%s%s%s%s%s%s%s" 1736 "irqenb %02x\n", 1737 ep->ep.name, t1, t2, 1738 (t2 & BIT(CLEAR_NAK_OUT_PACKETS)) 1739 ? "NAK " : "", 1740 (t2 & BIT(CLEAR_EP_HIDE_STATUS_PHASE)) 1741 ? "hide " : "", 1742 (t2 & BIT(CLEAR_EP_FORCE_CRC_ERROR)) 1743 ? "CRC " : "", 1744 (t2 & BIT(CLEAR_INTERRUPT_MODE)) 1745 ? "interrupt " : "", 1746 (t2 & BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE)) 1747 ? "status " : "", 1748 (t2 & BIT(CLEAR_NAK_OUT_PACKETS_MODE)) 1749 ? "NAKmode " : "", 1750 (t2 & BIT(CLEAR_ENDPOINT_TOGGLE)) 1751 ? "DATA1 " : "DATA0 ", 1752 (t2 & BIT(CLEAR_ENDPOINT_HALT)) 1753 ? "HALT " : "", 1754 readl(&ep->regs->ep_irqenb)); 1755 size -= t; 1756 next += t; 1757 1758 t = scnprintf(next, size, 1759 "\tstat %08x avail %04x " 1760 "(ep%d%s-%s)%s\n", 1761 readl(&ep->regs->ep_stat), 1762 readl(&ep->regs->ep_avail), 1763 t1 & 0x0f, DIR_STRING(t1), 1764 type_string(t1 >> 8), 1765 ep->stopped ? "*" : ""); 1766 size -= t; 1767 next += t; 1768 1769 if (!ep->dma) 1770 continue; 1771 1772 t = scnprintf(next, size, 1773 " dma\tctl %08x stat %08x count %08x\n" 1774 "\taddr %08x desc %08x\n", 1775 readl(&ep->dma->dmactl), 1776 readl(&ep->dma->dmastat), 1777 readl(&ep->dma->dmacount), 1778 readl(&ep->dma->dmaaddr), 1779 readl(&ep->dma->dmadesc)); 1780 size -= t; 1781 next += t; 1782 1783 } 1784 1785 /* Indexed Registers (none yet) */ 1786 1787 /* Statistics */ 1788 t = scnprintf(next, size, "\nirqs: "); 1789 size -= t; 1790 next += t; 1791 for (i = 0; i < dev->n_ep; i++) { 1792 struct net2280_ep *ep; 1793 1794 ep = &dev->ep[i]; 1795 if (i && !ep->irqs) 1796 continue; 1797 t = scnprintf(next, size, " %s/%lu", ep->ep.name, ep->irqs); 1798 size -= t; 1799 next += t; 1800 1801 } 1802 t = scnprintf(next, size, "\n"); 1803 size -= t; 1804 next += t; 1805 1806 spin_unlock_irqrestore(&dev->lock, flags); 1807 1808 return PAGE_SIZE - size; 1809 } 1810 static DEVICE_ATTR_RO(registers); 1811 1812 static ssize_t queues_show(struct device *_dev, struct device_attribute *attr, 1813 char *buf) 1814 { 1815 struct net2280 *dev; 1816 char *next; 1817 unsigned size; 1818 unsigned long flags; 1819 int i; 1820 1821 dev = dev_get_drvdata(_dev); 1822 next = buf; 1823 size = PAGE_SIZE; 1824 spin_lock_irqsave(&dev->lock, flags); 1825 1826 for (i = 0; i < dev->n_ep; i++) { 1827 struct net2280_ep *ep = &dev->ep[i]; 1828 struct net2280_request *req; 1829 int t; 1830 1831 if (i != 0) { 1832 const struct usb_endpoint_descriptor *d; 1833 1834 d = ep->desc; 1835 if (!d) 1836 continue; 1837 t = d->bEndpointAddress; 1838 t = scnprintf(next, size, 1839 "\n%s (ep%d%s-%s) max %04x %s fifo %d\n", 1840 ep->ep.name, t & USB_ENDPOINT_NUMBER_MASK, 1841 (t & USB_DIR_IN) ? "in" : "out", 1842 type_string(d->bmAttributes), 1843 usb_endpoint_maxp(d), 1844 ep->dma ? "dma" : "pio", ep->fifo_size 1845 ); 1846 } else /* ep0 should only have one transfer queued */ 1847 t = scnprintf(next, size, "ep0 max 64 pio %s\n", 1848 ep->is_in ? "in" : "out"); 1849 if (t <= 0 || t > size) 1850 goto done; 1851 size -= t; 1852 next += t; 1853 1854 if (list_empty(&ep->queue)) { 1855 t = scnprintf(next, size, "\t(nothing queued)\n"); 1856 if (t <= 0 || t > size) 1857 goto done; 1858 size -= t; 1859 next += t; 1860 continue; 1861 } 1862 list_for_each_entry(req, &ep->queue, queue) { 1863 if (ep->dma && req->td_dma == readl(&ep->dma->dmadesc)) 1864 t = scnprintf(next, size, 1865 "\treq %p len %d/%d " 1866 "buf %p (dmacount %08x)\n", 1867 &req->req, req->req.actual, 1868 req->req.length, req->req.buf, 1869 readl(&ep->dma->dmacount)); 1870 else 1871 t = scnprintf(next, size, 1872 "\treq %p len %d/%d buf %p\n", 1873 &req->req, req->req.actual, 1874 req->req.length, req->req.buf); 1875 if (t <= 0 || t > size) 1876 goto done; 1877 size -= t; 1878 next += t; 1879 1880 if (ep->dma) { 1881 struct net2280_dma *td; 1882 1883 td = req->td; 1884 t = scnprintf(next, size, "\t td %08x " 1885 " count %08x buf %08x desc %08x\n", 1886 (u32) req->td_dma, 1887 le32_to_cpu(td->dmacount), 1888 le32_to_cpu(td->dmaaddr), 1889 le32_to_cpu(td->dmadesc)); 1890 if (t <= 0 || t > size) 1891 goto done; 1892 size -= t; 1893 next += t; 1894 } 1895 } 1896 } 1897 1898 done: 1899 spin_unlock_irqrestore(&dev->lock, flags); 1900 return PAGE_SIZE - size; 1901 } 1902 static DEVICE_ATTR_RO(queues); 1903 1904 1905 #else 1906 1907 #define device_create_file(a, b) (0) 1908 #define device_remove_file(a, b) do { } while (0) 1909 1910 #endif 1911 1912 /*-------------------------------------------------------------------------*/ 1913 1914 /* another driver-specific mode might be a request type doing dma 1915 * to/from another device fifo instead of to/from memory. 1916 */ 1917 1918 static void set_fifo_mode(struct net2280 *dev, int mode) 1919 { 1920 /* keeping high bits preserves BAR2 */ 1921 writel((0xffff << PCI_BASE2_RANGE) | mode, &dev->regs->fifoctl); 1922 1923 /* always ep-{a,b,e,f} ... maybe not ep-c or ep-d */ 1924 INIT_LIST_HEAD(&dev->gadget.ep_list); 1925 list_add_tail(&dev->ep[1].ep.ep_list, &dev->gadget.ep_list); 1926 list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list); 1927 switch (mode) { 1928 case 0: 1929 list_add_tail(&dev->ep[3].ep.ep_list, &dev->gadget.ep_list); 1930 list_add_tail(&dev->ep[4].ep.ep_list, &dev->gadget.ep_list); 1931 dev->ep[1].fifo_size = dev->ep[2].fifo_size = 1024; 1932 break; 1933 case 1: 1934 dev->ep[1].fifo_size = dev->ep[2].fifo_size = 2048; 1935 break; 1936 case 2: 1937 list_add_tail(&dev->ep[3].ep.ep_list, &dev->gadget.ep_list); 1938 dev->ep[1].fifo_size = 2048; 1939 dev->ep[2].fifo_size = 1024; 1940 break; 1941 } 1942 /* fifo sizes for ep0, ep-c, ep-d, ep-e, and ep-f never change */ 1943 list_add_tail(&dev->ep[5].ep.ep_list, &dev->gadget.ep_list); 1944 list_add_tail(&dev->ep[6].ep.ep_list, &dev->gadget.ep_list); 1945 } 1946 1947 static void defect7374_disable_data_eps(struct net2280 *dev) 1948 { 1949 /* 1950 * For Defect 7374, disable data EPs (and more): 1951 * - This phase undoes the earlier phase of the Defect 7374 workaround, 1952 * returing ep regs back to normal. 1953 */ 1954 struct net2280_ep *ep; 1955 int i; 1956 unsigned char ep_sel; 1957 u32 tmp_reg; 1958 1959 for (i = 1; i < 5; i++) { 1960 ep = &dev->ep[i]; 1961 writel(i, &ep->cfg->ep_cfg); 1962 } 1963 1964 /* CSROUT, CSRIN, PCIOUT, PCIIN, STATIN, RCIN */ 1965 for (i = 0; i < 6; i++) 1966 writel(0, &dev->dep[i].dep_cfg); 1967 1968 for (ep_sel = 0; ep_sel <= 21; ep_sel++) { 1969 /* Select an endpoint for subsequent operations: */ 1970 tmp_reg = readl(&dev->plregs->pl_ep_ctrl); 1971 writel(((tmp_reg & ~0x1f) | ep_sel), &dev->plregs->pl_ep_ctrl); 1972 1973 if (ep_sel < 2 || (ep_sel > 9 && ep_sel < 14) || 1974 ep_sel == 18 || ep_sel == 20) 1975 continue; 1976 1977 /* Change settings on some selected endpoints */ 1978 tmp_reg = readl(&dev->plregs->pl_ep_cfg_4); 1979 tmp_reg &= ~BIT(NON_CTRL_IN_TOLERATE_BAD_DIR); 1980 writel(tmp_reg, &dev->plregs->pl_ep_cfg_4); 1981 tmp_reg = readl(&dev->plregs->pl_ep_ctrl); 1982 tmp_reg |= BIT(EP_INITIALIZED); 1983 writel(tmp_reg, &dev->plregs->pl_ep_ctrl); 1984 } 1985 } 1986 1987 static void defect7374_enable_data_eps_zero(struct net2280 *dev) 1988 { 1989 u32 tmp = 0, tmp_reg; 1990 u32 scratch; 1991 int i; 1992 unsigned char ep_sel; 1993 1994 scratch = get_idx_reg(dev->regs, SCRATCH); 1995 1996 WARN_ON((scratch & (0xf << DEFECT7374_FSM_FIELD)) 1997 == DEFECT7374_FSM_SS_CONTROL_READ); 1998 1999 scratch &= ~(0xf << DEFECT7374_FSM_FIELD); 2000 2001 ep_warn(dev, "Operate Defect 7374 workaround soft this time"); 2002 ep_warn(dev, "It will operate on cold-reboot and SS connect"); 2003 2004 /*GPEPs:*/ 2005 tmp = ((0 << ENDPOINT_NUMBER) | BIT(ENDPOINT_DIRECTION) | 2006 (2 << OUT_ENDPOINT_TYPE) | (2 << IN_ENDPOINT_TYPE) | 2007 ((dev->enhanced_mode) ? 2008 BIT(OUT_ENDPOINT_ENABLE) | BIT(IN_ENDPOINT_ENABLE) : 2009 BIT(ENDPOINT_ENABLE))); 2010 2011 for (i = 1; i < 5; i++) 2012 writel(tmp, &dev->ep[i].cfg->ep_cfg); 2013 2014 /* CSRIN, PCIIN, STATIN, RCIN*/ 2015 tmp = ((0 << ENDPOINT_NUMBER) | BIT(ENDPOINT_ENABLE)); 2016 writel(tmp, &dev->dep[1].dep_cfg); 2017 writel(tmp, &dev->dep[3].dep_cfg); 2018 writel(tmp, &dev->dep[4].dep_cfg); 2019 writel(tmp, &dev->dep[5].dep_cfg); 2020 2021 /*Implemented for development and debug. 2022 * Can be refined/tuned later.*/ 2023 for (ep_sel = 0; ep_sel <= 21; ep_sel++) { 2024 /* Select an endpoint for subsequent operations: */ 2025 tmp_reg = readl(&dev->plregs->pl_ep_ctrl); 2026 writel(((tmp_reg & ~0x1f) | ep_sel), 2027 &dev->plregs->pl_ep_ctrl); 2028 2029 if (ep_sel == 1) { 2030 tmp = 2031 (readl(&dev->plregs->pl_ep_ctrl) | 2032 BIT(CLEAR_ACK_ERROR_CODE) | 0); 2033 writel(tmp, &dev->plregs->pl_ep_ctrl); 2034 continue; 2035 } 2036 2037 if (ep_sel == 0 || (ep_sel > 9 && ep_sel < 14) || 2038 ep_sel == 18 || ep_sel == 20) 2039 continue; 2040 2041 tmp = (readl(&dev->plregs->pl_ep_cfg_4) | 2042 BIT(NON_CTRL_IN_TOLERATE_BAD_DIR) | 0); 2043 writel(tmp, &dev->plregs->pl_ep_cfg_4); 2044 2045 tmp = readl(&dev->plregs->pl_ep_ctrl) & 2046 ~BIT(EP_INITIALIZED); 2047 writel(tmp, &dev->plregs->pl_ep_ctrl); 2048 2049 } 2050 2051 /* Set FSM to focus on the first Control Read: 2052 * - Tip: Connection speed is known upon the first 2053 * setup request.*/ 2054 scratch |= DEFECT7374_FSM_WAITING_FOR_CONTROL_READ; 2055 set_idx_reg(dev->regs, SCRATCH, scratch); 2056 2057 } 2058 2059 /* keeping it simple: 2060 * - one bus driver, initted first; 2061 * - one function driver, initted second 2062 * 2063 * most of the work to support multiple net2280 controllers would 2064 * be to associate this gadget driver (yes?) with all of them, or 2065 * perhaps to bind specific drivers to specific devices. 2066 */ 2067 2068 static void usb_reset_228x(struct net2280 *dev) 2069 { 2070 u32 tmp; 2071 2072 dev->gadget.speed = USB_SPEED_UNKNOWN; 2073 (void) readl(&dev->usb->usbctl); 2074 2075 net2280_led_init(dev); 2076 2077 /* disable automatic responses, and irqs */ 2078 writel(0, &dev->usb->stdrsp); 2079 writel(0, &dev->regs->pciirqenb0); 2080 writel(0, &dev->regs->pciirqenb1); 2081 2082 /* clear old dma and irq state */ 2083 for (tmp = 0; tmp < 4; tmp++) { 2084 struct net2280_ep *ep = &dev->ep[tmp + 1]; 2085 if (ep->dma) 2086 abort_dma(ep); 2087 } 2088 2089 writel(~0, &dev->regs->irqstat0), 2090 writel(~(u32)BIT(SUSPEND_REQUEST_INTERRUPT), &dev->regs->irqstat1), 2091 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 writel(tmp, &dev->regs->devinit); 2099 2100 /* standard fifo and endpoint allocations */ 2101 set_fifo_mode(dev, (fifo_mode <= 2) ? fifo_mode : 0); 2102 } 2103 2104 static void usb_reset_338x(struct net2280 *dev) 2105 { 2106 u32 tmp; 2107 2108 dev->gadget.speed = USB_SPEED_UNKNOWN; 2109 (void)readl(&dev->usb->usbctl); 2110 2111 net2280_led_init(dev); 2112 2113 if (dev->bug7734_patched) { 2114 /* disable automatic responses, and irqs */ 2115 writel(0, &dev->usb->stdrsp); 2116 writel(0, &dev->regs->pciirqenb0); 2117 writel(0, &dev->regs->pciirqenb1); 2118 } 2119 2120 /* clear old dma and irq state */ 2121 for (tmp = 0; tmp < 4; tmp++) { 2122 struct net2280_ep *ep = &dev->ep[tmp + 1]; 2123 struct net2280_dma_regs __iomem *dma; 2124 2125 if (ep->dma) { 2126 abort_dma(ep); 2127 } else { 2128 dma = &dev->dma[tmp]; 2129 writel(BIT(DMA_ABORT), &dma->dmastat); 2130 writel(0, &dma->dmactl); 2131 } 2132 } 2133 2134 writel(~0, &dev->regs->irqstat0), writel(~0, &dev->regs->irqstat1); 2135 2136 if (dev->bug7734_patched) { 2137 /* reset, and enable pci */ 2138 tmp = readl(&dev->regs->devinit) | 2139 BIT(PCI_ENABLE) | 2140 BIT(FIFO_SOFT_RESET) | 2141 BIT(USB_SOFT_RESET) | 2142 BIT(M8051_RESET); 2143 2144 writel(tmp, &dev->regs->devinit); 2145 } 2146 2147 /* always ep-{1,2,3,4} ... maybe not ep-3 or ep-4 */ 2148 INIT_LIST_HEAD(&dev->gadget.ep_list); 2149 2150 for (tmp = 1; tmp < dev->n_ep; tmp++) 2151 list_add_tail(&dev->ep[tmp].ep.ep_list, &dev->gadget.ep_list); 2152 2153 } 2154 2155 static void usb_reset(struct net2280 *dev) 2156 { 2157 if (dev->quirks & PLX_LEGACY) 2158 return usb_reset_228x(dev); 2159 return usb_reset_338x(dev); 2160 } 2161 2162 static void usb_reinit_228x(struct net2280 *dev) 2163 { 2164 u32 tmp; 2165 2166 /* basic endpoint init */ 2167 for (tmp = 0; tmp < 7; tmp++) { 2168 struct net2280_ep *ep = &dev->ep[tmp]; 2169 2170 ep->ep.name = ep_info_dft[tmp].name; 2171 ep->ep.caps = ep_info_dft[tmp].caps; 2172 ep->dev = dev; 2173 ep->num = tmp; 2174 2175 if (tmp > 0 && tmp <= 4) { 2176 ep->fifo_size = 1024; 2177 ep->dma = &dev->dma[tmp - 1]; 2178 } else 2179 ep->fifo_size = 64; 2180 ep->regs = &dev->epregs[tmp]; 2181 ep->cfg = &dev->epregs[tmp]; 2182 ep_reset_228x(dev->regs, ep); 2183 } 2184 usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 64); 2185 usb_ep_set_maxpacket_limit(&dev->ep[5].ep, 64); 2186 usb_ep_set_maxpacket_limit(&dev->ep[6].ep, 64); 2187 2188 dev->gadget.ep0 = &dev->ep[0].ep; 2189 dev->ep[0].stopped = 0; 2190 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); 2191 2192 /* we want to prevent lowlevel/insecure access from the USB host, 2193 * but erratum 0119 means this enable bit is ignored 2194 */ 2195 for (tmp = 0; tmp < 5; tmp++) 2196 writel(EP_DONTUSE, &dev->dep[tmp].dep_cfg); 2197 } 2198 2199 static void usb_reinit_338x(struct net2280 *dev) 2200 { 2201 int i; 2202 u32 tmp, val; 2203 static const u32 ne[9] = { 0, 1, 2, 3, 4, 1, 2, 3, 4 }; 2204 static const u32 ep_reg_addr[9] = { 0x00, 0xC0, 0x00, 0xC0, 0x00, 2205 0x00, 0xC0, 0x00, 0xC0 }; 2206 2207 /* basic endpoint init */ 2208 for (i = 0; i < dev->n_ep; i++) { 2209 struct net2280_ep *ep = &dev->ep[i]; 2210 2211 ep->ep.name = dev->enhanced_mode ? ep_info_adv[i].name : 2212 ep_info_dft[i].name; 2213 ep->ep.caps = dev->enhanced_mode ? ep_info_adv[i].caps : 2214 ep_info_dft[i].caps; 2215 ep->dev = dev; 2216 ep->num = i; 2217 2218 if (i > 0 && i <= 4) 2219 ep->dma = &dev->dma[i - 1]; 2220 2221 if (dev->enhanced_mode) { 2222 ep->cfg = &dev->epregs[ne[i]]; 2223 /* 2224 * Set USB endpoint number, hardware allows same number 2225 * in both directions. 2226 */ 2227 if (i > 0 && i < 5) 2228 writel(ne[i], &ep->cfg->ep_cfg); 2229 ep->regs = (struct net2280_ep_regs __iomem *) 2230 (((void __iomem *)&dev->epregs[ne[i]]) + 2231 ep_reg_addr[i]); 2232 } else { 2233 ep->cfg = &dev->epregs[i]; 2234 ep->regs = &dev->epregs[i]; 2235 } 2236 2237 ep->fifo_size = (i != 0) ? 2048 : 512; 2238 2239 ep_reset_338x(dev->regs, ep); 2240 } 2241 usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 512); 2242 2243 dev->gadget.ep0 = &dev->ep[0].ep; 2244 dev->ep[0].stopped = 0; 2245 2246 /* Link layer set up */ 2247 if (dev->bug7734_patched) { 2248 tmp = readl(&dev->usb_ext->usbctl2) & 2249 ~(BIT(U1_ENABLE) | BIT(U2_ENABLE) | BIT(LTM_ENABLE)); 2250 writel(tmp, &dev->usb_ext->usbctl2); 2251 } 2252 2253 /* Hardware Defect and Workaround */ 2254 val = readl(&dev->ll_lfps_regs->ll_lfps_5); 2255 val &= ~(0xf << TIMER_LFPS_6US); 2256 val |= 0x5 << TIMER_LFPS_6US; 2257 writel(val, &dev->ll_lfps_regs->ll_lfps_5); 2258 2259 val = readl(&dev->ll_lfps_regs->ll_lfps_6); 2260 val &= ~(0xffff << TIMER_LFPS_80US); 2261 val |= 0x0100 << TIMER_LFPS_80US; 2262 writel(val, &dev->ll_lfps_regs->ll_lfps_6); 2263 2264 /* 2265 * AA_AB Errata. Issue 4. Workaround for SuperSpeed USB 2266 * Hot Reset Exit Handshake may Fail in Specific Case using 2267 * Default Register Settings. Workaround for Enumeration test. 2268 */ 2269 val = readl(&dev->ll_tsn_regs->ll_tsn_counters_2); 2270 val &= ~(0x1f << HOT_TX_NORESET_TS2); 2271 val |= 0x10 << HOT_TX_NORESET_TS2; 2272 writel(val, &dev->ll_tsn_regs->ll_tsn_counters_2); 2273 2274 val = readl(&dev->ll_tsn_regs->ll_tsn_counters_3); 2275 val &= ~(0x1f << HOT_RX_RESET_TS2); 2276 val |= 0x3 << HOT_RX_RESET_TS2; 2277 writel(val, &dev->ll_tsn_regs->ll_tsn_counters_3); 2278 2279 /* 2280 * Set Recovery Idle to Recover bit: 2281 * - On SS connections, setting Recovery Idle to Recover Fmw improves 2282 * link robustness with various hosts and hubs. 2283 * - It is safe to set for all connection speeds; all chip revisions. 2284 * - R-M-W to leave other bits undisturbed. 2285 * - Reference PLX TT-7372 2286 */ 2287 val = readl(&dev->ll_chicken_reg->ll_tsn_chicken_bit); 2288 val |= BIT(RECOVERY_IDLE_TO_RECOVER_FMW); 2289 writel(val, &dev->ll_chicken_reg->ll_tsn_chicken_bit); 2290 2291 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); 2292 2293 /* disable dedicated endpoints */ 2294 writel(0x0D, &dev->dep[0].dep_cfg); 2295 writel(0x0D, &dev->dep[1].dep_cfg); 2296 writel(0x0E, &dev->dep[2].dep_cfg); 2297 writel(0x0E, &dev->dep[3].dep_cfg); 2298 writel(0x0F, &dev->dep[4].dep_cfg); 2299 writel(0x0C, &dev->dep[5].dep_cfg); 2300 } 2301 2302 static void usb_reinit(struct net2280 *dev) 2303 { 2304 if (dev->quirks & PLX_LEGACY) 2305 return usb_reinit_228x(dev); 2306 return usb_reinit_338x(dev); 2307 } 2308 2309 static void ep0_start_228x(struct net2280 *dev) 2310 { 2311 writel(BIT(CLEAR_EP_HIDE_STATUS_PHASE) | 2312 BIT(CLEAR_NAK_OUT_PACKETS) | 2313 BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE), 2314 &dev->epregs[0].ep_rsp); 2315 2316 /* 2317 * hardware optionally handles a bunch of standard requests 2318 * that the API hides from drivers anyway. have it do so. 2319 * endpoint status/features are handled in software, to 2320 * help pass tests for some dubious behavior. 2321 */ 2322 writel(BIT(SET_TEST_MODE) | 2323 BIT(SET_ADDRESS) | 2324 BIT(DEVICE_SET_CLEAR_DEVICE_REMOTE_WAKEUP) | 2325 BIT(GET_DEVICE_STATUS) | 2326 BIT(GET_INTERFACE_STATUS), 2327 &dev->usb->stdrsp); 2328 writel(BIT(USB_ROOT_PORT_WAKEUP_ENABLE) | 2329 BIT(SELF_POWERED_USB_DEVICE) | 2330 BIT(REMOTE_WAKEUP_SUPPORT) | 2331 (dev->softconnect << USB_DETECT_ENABLE) | 2332 BIT(SELF_POWERED_STATUS), 2333 &dev->usb->usbctl); 2334 2335 /* enable irqs so we can see ep0 and general operation */ 2336 writel(BIT(SETUP_PACKET_INTERRUPT_ENABLE) | 2337 BIT(ENDPOINT_0_INTERRUPT_ENABLE), 2338 &dev->regs->pciirqenb0); 2339 writel(BIT(PCI_INTERRUPT_ENABLE) | 2340 BIT(PCI_MASTER_ABORT_RECEIVED_INTERRUPT_ENABLE) | 2341 BIT(PCI_TARGET_ABORT_RECEIVED_INTERRUPT_ENABLE) | 2342 BIT(PCI_RETRY_ABORT_INTERRUPT_ENABLE) | 2343 BIT(VBUS_INTERRUPT_ENABLE) | 2344 BIT(ROOT_PORT_RESET_INTERRUPT_ENABLE) | 2345 BIT(SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE), 2346 &dev->regs->pciirqenb1); 2347 2348 /* don't leave any writes posted */ 2349 (void) readl(&dev->usb->usbctl); 2350 } 2351 2352 static void ep0_start_338x(struct net2280 *dev) 2353 { 2354 2355 if (dev->bug7734_patched) 2356 writel(BIT(CLEAR_NAK_OUT_PACKETS_MODE) | 2357 BIT(SET_EP_HIDE_STATUS_PHASE), 2358 &dev->epregs[0].ep_rsp); 2359 2360 /* 2361 * hardware optionally handles a bunch of standard requests 2362 * that the API hides from drivers anyway. have it do so. 2363 * endpoint status/features are handled in software, to 2364 * help pass tests for some dubious behavior. 2365 */ 2366 writel(BIT(SET_ISOCHRONOUS_DELAY) | 2367 BIT(SET_SEL) | 2368 BIT(SET_TEST_MODE) | 2369 BIT(SET_ADDRESS) | 2370 BIT(GET_INTERFACE_STATUS) | 2371 BIT(GET_DEVICE_STATUS), 2372 &dev->usb->stdrsp); 2373 dev->wakeup_enable = 1; 2374 writel(BIT(USB_ROOT_PORT_WAKEUP_ENABLE) | 2375 (dev->softconnect << USB_DETECT_ENABLE) | 2376 BIT(DEVICE_REMOTE_WAKEUP_ENABLE), 2377 &dev->usb->usbctl); 2378 2379 /* enable irqs so we can see ep0 and general operation */ 2380 writel(BIT(SETUP_PACKET_INTERRUPT_ENABLE) | 2381 BIT(ENDPOINT_0_INTERRUPT_ENABLE), 2382 &dev->regs->pciirqenb0); 2383 writel(BIT(PCI_INTERRUPT_ENABLE) | 2384 BIT(ROOT_PORT_RESET_INTERRUPT_ENABLE) | 2385 BIT(SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE) | 2386 BIT(VBUS_INTERRUPT_ENABLE), 2387 &dev->regs->pciirqenb1); 2388 2389 /* don't leave any writes posted */ 2390 (void)readl(&dev->usb->usbctl); 2391 } 2392 2393 static void ep0_start(struct net2280 *dev) 2394 { 2395 if (dev->quirks & PLX_LEGACY) 2396 return ep0_start_228x(dev); 2397 return ep0_start_338x(dev); 2398 } 2399 2400 /* when a driver is successfully registered, it will receive 2401 * control requests including set_configuration(), which enables 2402 * non-control requests. then usb traffic follows until a 2403 * disconnect is reported. then a host may connect again, or 2404 * the driver might get unbound. 2405 */ 2406 static int net2280_start(struct usb_gadget *_gadget, 2407 struct usb_gadget_driver *driver) 2408 { 2409 struct net2280 *dev; 2410 int retval; 2411 unsigned i; 2412 2413 /* insist on high speed support from the driver, since 2414 * (dev->usb->xcvrdiag & FORCE_FULL_SPEED_MODE) 2415 * "must not be used in normal operation" 2416 */ 2417 if (!driver || driver->max_speed < USB_SPEED_HIGH || 2418 !driver->setup) 2419 return -EINVAL; 2420 2421 dev = container_of(_gadget, struct net2280, gadget); 2422 2423 for (i = 0; i < dev->n_ep; i++) 2424 dev->ep[i].irqs = 0; 2425 2426 /* hook up the driver ... */ 2427 driver->driver.bus = NULL; 2428 dev->driver = driver; 2429 2430 retval = device_create_file(&dev->pdev->dev, &dev_attr_function); 2431 if (retval) 2432 goto err_unbind; 2433 retval = device_create_file(&dev->pdev->dev, &dev_attr_queues); 2434 if (retval) 2435 goto err_func; 2436 2437 /* enable host detection and ep0; and we're ready 2438 * for set_configuration as well as eventual disconnect. 2439 */ 2440 net2280_led_active(dev, 1); 2441 2442 if ((dev->quirks & PLX_PCIE) && !dev->bug7734_patched) 2443 defect7374_enable_data_eps_zero(dev); 2444 2445 ep0_start(dev); 2446 2447 /* pci writes may still be posted */ 2448 return 0; 2449 2450 err_func: 2451 device_remove_file(&dev->pdev->dev, &dev_attr_function); 2452 err_unbind: 2453 dev->driver = NULL; 2454 return retval; 2455 } 2456 2457 static void stop_activity(struct net2280 *dev, struct usb_gadget_driver *driver) 2458 { 2459 int i; 2460 2461 /* don't disconnect if it's not connected */ 2462 if (dev->gadget.speed == USB_SPEED_UNKNOWN) 2463 driver = NULL; 2464 2465 /* stop hardware; prevent new request submissions; 2466 * and kill any outstanding requests. 2467 */ 2468 usb_reset(dev); 2469 for (i = 0; i < dev->n_ep; i++) 2470 nuke(&dev->ep[i]); 2471 2472 /* report disconnect; the driver is already quiesced */ 2473 if (driver) 2474 driver->disconnect(&dev->gadget); 2475 2476 usb_reinit(dev); 2477 } 2478 2479 static int net2280_stop(struct usb_gadget *_gadget) 2480 { 2481 struct net2280 *dev; 2482 unsigned long flags; 2483 2484 dev = container_of(_gadget, struct net2280, gadget); 2485 2486 spin_lock_irqsave(&dev->lock, flags); 2487 stop_activity(dev, NULL); 2488 spin_unlock_irqrestore(&dev->lock, flags); 2489 2490 net2280_led_active(dev, 0); 2491 2492 device_remove_file(&dev->pdev->dev, &dev_attr_function); 2493 device_remove_file(&dev->pdev->dev, &dev_attr_queues); 2494 2495 dev->driver = NULL; 2496 2497 return 0; 2498 } 2499 2500 /*-------------------------------------------------------------------------*/ 2501 2502 /* handle ep0, ep-e, ep-f with 64 byte packets: packet per irq. 2503 * also works for dma-capable endpoints, in pio mode or just 2504 * to manually advance the queue after short OUT transfers. 2505 */ 2506 static void handle_ep_small(struct net2280_ep *ep) 2507 { 2508 struct net2280_request *req; 2509 u32 t; 2510 /* 0 error, 1 mid-data, 2 done */ 2511 int mode = 1; 2512 2513 if (!list_empty(&ep->queue)) 2514 req = list_entry(ep->queue.next, 2515 struct net2280_request, queue); 2516 else 2517 req = NULL; 2518 2519 /* ack all, and handle what we care about */ 2520 t = readl(&ep->regs->ep_stat); 2521 ep->irqs++; 2522 2523 ep_vdbg(ep->dev, "%s ack ep_stat %08x, req %p\n", 2524 ep->ep.name, t, req ? &req->req : NULL); 2525 2526 if (!ep->is_in || (ep->dev->quirks & PLX_2280)) 2527 writel(t & ~BIT(NAK_OUT_PACKETS), &ep->regs->ep_stat); 2528 else 2529 /* Added for 2282 */ 2530 writel(t, &ep->regs->ep_stat); 2531 2532 /* for ep0, monitor token irqs to catch data stage length errors 2533 * and to synchronize on status. 2534 * 2535 * also, to defer reporting of protocol stalls ... here's where 2536 * data or status first appears, handling stalls here should never 2537 * cause trouble on the host side.. 2538 * 2539 * control requests could be slightly faster without token synch for 2540 * status, but status can jam up that way. 2541 */ 2542 if (unlikely(ep->num == 0)) { 2543 if (ep->is_in) { 2544 /* status; stop NAKing */ 2545 if (t & BIT(DATA_OUT_PING_TOKEN_INTERRUPT)) { 2546 if (ep->dev->protocol_stall) { 2547 ep->stopped = 1; 2548 set_halt(ep); 2549 } 2550 if (!req) 2551 allow_status(ep); 2552 mode = 2; 2553 /* reply to extra IN data tokens with a zlp */ 2554 } else if (t & BIT(DATA_IN_TOKEN_INTERRUPT)) { 2555 if (ep->dev->protocol_stall) { 2556 ep->stopped = 1; 2557 set_halt(ep); 2558 mode = 2; 2559 } else if (ep->responded && 2560 !req && !ep->stopped) 2561 write_fifo(ep, NULL); 2562 } 2563 } else { 2564 /* status; stop NAKing */ 2565 if (t & BIT(DATA_IN_TOKEN_INTERRUPT)) { 2566 if (ep->dev->protocol_stall) { 2567 ep->stopped = 1; 2568 set_halt(ep); 2569 } 2570 mode = 2; 2571 /* an extra OUT token is an error */ 2572 } else if (((t & BIT(DATA_OUT_PING_TOKEN_INTERRUPT)) && 2573 req && 2574 req->req.actual == req->req.length) || 2575 (ep->responded && !req)) { 2576 ep->dev->protocol_stall = 1; 2577 set_halt(ep); 2578 ep->stopped = 1; 2579 if (req) 2580 done(ep, req, -EOVERFLOW); 2581 req = NULL; 2582 } 2583 } 2584 } 2585 2586 if (unlikely(!req)) 2587 return; 2588 2589 /* manual DMA queue advance after short OUT */ 2590 if (likely(ep->dma)) { 2591 if (t & BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT)) { 2592 struct net2280_request *stuck_req = NULL; 2593 int stopped = ep->stopped; 2594 int num_completed; 2595 int stuck = 0; 2596 u32 count; 2597 2598 /* TRANSFERRED works around OUT_DONE erratum 0112. 2599 * we expect (N <= maxpacket) bytes; host wrote M. 2600 * iff (M < N) we won't ever see a DMA interrupt. 2601 */ 2602 ep->stopped = 1; 2603 for (count = 0; ; t = readl(&ep->regs->ep_stat)) { 2604 2605 /* any preceding dma transfers must finish. 2606 * dma handles (M >= N), may empty the queue 2607 */ 2608 num_completed = scan_dma_completions(ep); 2609 if (unlikely(list_empty(&ep->queue) || 2610 ep->out_overflow)) { 2611 req = NULL; 2612 break; 2613 } 2614 req = list_entry(ep->queue.next, 2615 struct net2280_request, queue); 2616 2617 /* here either (M < N), a "real" short rx; 2618 * or (M == N) and the queue didn't empty 2619 */ 2620 if (likely(t & BIT(FIFO_EMPTY))) { 2621 count = readl(&ep->dma->dmacount); 2622 count &= DMA_BYTE_COUNT_MASK; 2623 if (readl(&ep->dma->dmadesc) 2624 != req->td_dma) 2625 req = NULL; 2626 break; 2627 } 2628 2629 /* Escape loop if no dma transfers completed 2630 * after few retries. 2631 */ 2632 if (num_completed == 0) { 2633 if (stuck_req == req && 2634 readl(&ep->dma->dmadesc) != 2635 req->td_dma && stuck++ > 5) { 2636 count = readl( 2637 &ep->dma->dmacount); 2638 count &= DMA_BYTE_COUNT_MASK; 2639 req = NULL; 2640 ep_dbg(ep->dev, "%s escape stuck %d, count %u\n", 2641 ep->ep.name, stuck, 2642 count); 2643 break; 2644 } else if (stuck_req != req) { 2645 stuck_req = req; 2646 stuck = 0; 2647 } 2648 } else { 2649 stuck_req = NULL; 2650 stuck = 0; 2651 } 2652 2653 udelay(1); 2654 } 2655 2656 /* stop DMA, leave ep NAKing */ 2657 writel(BIT(DMA_ABORT), &ep->dma->dmastat); 2658 spin_stop_dma(ep->dma); 2659 2660 if (likely(req)) { 2661 req->td->dmacount = 0; 2662 t = readl(&ep->regs->ep_avail); 2663 dma_done(ep, req, count, 2664 (ep->out_overflow || t) 2665 ? -EOVERFLOW : 0); 2666 } 2667 2668 /* also flush to prevent erratum 0106 trouble */ 2669 if (unlikely(ep->out_overflow || 2670 (ep->dev->chiprev == 0x0100 && 2671 ep->dev->gadget.speed 2672 == USB_SPEED_FULL))) { 2673 out_flush(ep); 2674 ep->out_overflow = 0; 2675 } 2676 2677 /* (re)start dma if needed, stop NAKing */ 2678 ep->stopped = stopped; 2679 if (!list_empty(&ep->queue)) 2680 restart_dma(ep); 2681 } else 2682 ep_dbg(ep->dev, "%s dma ep_stat %08x ??\n", 2683 ep->ep.name, t); 2684 return; 2685 2686 /* data packet(s) received (in the fifo, OUT) */ 2687 } else if (t & BIT(DATA_PACKET_RECEIVED_INTERRUPT)) { 2688 if (read_fifo(ep, req) && ep->num != 0) 2689 mode = 2; 2690 2691 /* data packet(s) transmitted (IN) */ 2692 } else if (t & BIT(DATA_PACKET_TRANSMITTED_INTERRUPT)) { 2693 unsigned len; 2694 2695 len = req->req.length - req->req.actual; 2696 if (len > ep->ep.maxpacket) 2697 len = ep->ep.maxpacket; 2698 req->req.actual += len; 2699 2700 /* if we wrote it all, we're usually done */ 2701 /* send zlps until the status stage */ 2702 if ((req->req.actual == req->req.length) && 2703 (!req->req.zero || len != ep->ep.maxpacket) && ep->num) 2704 mode = 2; 2705 2706 /* there was nothing to do ... */ 2707 } else if (mode == 1) 2708 return; 2709 2710 /* done */ 2711 if (mode == 2) { 2712 /* stream endpoints often resubmit/unlink in completion */ 2713 done(ep, req, 0); 2714 2715 /* maybe advance queue to next request */ 2716 if (ep->num == 0) { 2717 /* NOTE: net2280 could let gadget driver start the 2718 * status stage later. since not all controllers let 2719 * them control that, the api doesn't (yet) allow it. 2720 */ 2721 if (!ep->stopped) 2722 allow_status(ep); 2723 req = NULL; 2724 } else { 2725 if (!list_empty(&ep->queue) && !ep->stopped) 2726 req = list_entry(ep->queue.next, 2727 struct net2280_request, queue); 2728 else 2729 req = NULL; 2730 if (req && !ep->is_in) 2731 stop_out_naking(ep); 2732 } 2733 } 2734 2735 /* is there a buffer for the next packet? 2736 * for best streaming performance, make sure there is one. 2737 */ 2738 if (req && !ep->stopped) { 2739 2740 /* load IN fifo with next packet (may be zlp) */ 2741 if (t & BIT(DATA_PACKET_TRANSMITTED_INTERRUPT)) 2742 write_fifo(ep, &req->req); 2743 } 2744 } 2745 2746 static struct net2280_ep *get_ep_by_addr(struct net2280 *dev, u16 wIndex) 2747 { 2748 struct net2280_ep *ep; 2749 2750 if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0) 2751 return &dev->ep[0]; 2752 list_for_each_entry(ep, &dev->gadget.ep_list, ep.ep_list) { 2753 u8 bEndpointAddress; 2754 2755 if (!ep->desc) 2756 continue; 2757 bEndpointAddress = ep->desc->bEndpointAddress; 2758 if ((wIndex ^ bEndpointAddress) & USB_DIR_IN) 2759 continue; 2760 if ((wIndex & 0x0f) == (bEndpointAddress & 0x0f)) 2761 return ep; 2762 } 2763 return NULL; 2764 } 2765 2766 static void defect7374_workaround(struct net2280 *dev, struct usb_ctrlrequest r) 2767 { 2768 u32 scratch, fsmvalue; 2769 u32 ack_wait_timeout, state; 2770 2771 /* Workaround for Defect 7374 (U1/U2 erroneously rejected): */ 2772 scratch = get_idx_reg(dev->regs, SCRATCH); 2773 fsmvalue = scratch & (0xf << DEFECT7374_FSM_FIELD); 2774 scratch &= ~(0xf << DEFECT7374_FSM_FIELD); 2775 2776 if (!((fsmvalue == DEFECT7374_FSM_WAITING_FOR_CONTROL_READ) && 2777 (r.bRequestType & USB_DIR_IN))) 2778 return; 2779 2780 /* This is the first Control Read for this connection: */ 2781 if (!(readl(&dev->usb->usbstat) & BIT(SUPER_SPEED_MODE))) { 2782 /* 2783 * Connection is NOT SS: 2784 * - Connection must be FS or HS. 2785 * - This FSM state should allow workaround software to 2786 * run after the next USB connection. 2787 */ 2788 scratch |= DEFECT7374_FSM_NON_SS_CONTROL_READ; 2789 dev->bug7734_patched = 1; 2790 goto restore_data_eps; 2791 } 2792 2793 /* Connection is SS: */ 2794 for (ack_wait_timeout = 0; 2795 ack_wait_timeout < DEFECT_7374_NUMBEROF_MAX_WAIT_LOOPS; 2796 ack_wait_timeout++) { 2797 2798 state = readl(&dev->plregs->pl_ep_status_1) 2799 & (0xff << STATE); 2800 if ((state >= (ACK_GOOD_NORMAL << STATE)) && 2801 (state <= (ACK_GOOD_MORE_ACKS_TO_COME << STATE))) { 2802 scratch |= DEFECT7374_FSM_SS_CONTROL_READ; 2803 dev->bug7734_patched = 1; 2804 break; 2805 } 2806 2807 /* 2808 * We have not yet received host's Data Phase ACK 2809 * - Wait and try again. 2810 */ 2811 udelay(DEFECT_7374_PROCESSOR_WAIT_TIME); 2812 2813 continue; 2814 } 2815 2816 2817 if (ack_wait_timeout >= DEFECT_7374_NUMBEROF_MAX_WAIT_LOOPS) { 2818 ep_err(dev, "FAIL: Defect 7374 workaround waited but failed " 2819 "to detect SS host's data phase ACK."); 2820 ep_err(dev, "PL_EP_STATUS_1(23:16):.Expected from 0x11 to 0x16" 2821 "got 0x%2.2x.\n", state >> STATE); 2822 } else { 2823 ep_warn(dev, "INFO: Defect 7374 workaround waited about\n" 2824 "%duSec for Control Read Data Phase ACK\n", 2825 DEFECT_7374_PROCESSOR_WAIT_TIME * ack_wait_timeout); 2826 } 2827 2828 restore_data_eps: 2829 /* 2830 * Restore data EPs to their pre-workaround settings (disabled, 2831 * initialized, and other details). 2832 */ 2833 defect7374_disable_data_eps(dev); 2834 2835 set_idx_reg(dev->regs, SCRATCH, scratch); 2836 2837 return; 2838 } 2839 2840 static void ep_clear_seqnum(struct net2280_ep *ep) 2841 { 2842 struct net2280 *dev = ep->dev; 2843 u32 val; 2844 static const u32 ep_pl[9] = { 0, 3, 4, 7, 8, 2, 5, 6, 9 }; 2845 2846 val = readl(&dev->plregs->pl_ep_ctrl) & ~0x1f; 2847 val |= ep_pl[ep->num]; 2848 writel(val, &dev->plregs->pl_ep_ctrl); 2849 val |= BIT(SEQUENCE_NUMBER_RESET); 2850 writel(val, &dev->plregs->pl_ep_ctrl); 2851 2852 return; 2853 } 2854 2855 static void handle_stat0_irqs_superspeed(struct net2280 *dev, 2856 struct net2280_ep *ep, struct usb_ctrlrequest r) 2857 { 2858 int tmp = 0; 2859 2860 #define w_value le16_to_cpu(r.wValue) 2861 #define w_index le16_to_cpu(r.wIndex) 2862 #define w_length le16_to_cpu(r.wLength) 2863 2864 switch (r.bRequest) { 2865 struct net2280_ep *e; 2866 u16 status; 2867 2868 case USB_REQ_SET_CONFIGURATION: 2869 dev->addressed_state = !w_value; 2870 goto usb3_delegate; 2871 2872 case USB_REQ_GET_STATUS: 2873 switch (r.bRequestType) { 2874 case (USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_DEVICE): 2875 status = dev->wakeup_enable ? 0x02 : 0x00; 2876 if (dev->gadget.is_selfpowered) 2877 status |= BIT(0); 2878 status |= (dev->u1_enable << 2 | dev->u2_enable << 3 | 2879 dev->ltm_enable << 4); 2880 writel(0, &dev->epregs[0].ep_irqenb); 2881 set_fifo_bytecount(ep, sizeof(status)); 2882 writel((__force u32) status, &dev->epregs[0].ep_data); 2883 allow_status_338x(ep); 2884 break; 2885 2886 case (USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_ENDPOINT): 2887 e = get_ep_by_addr(dev, w_index); 2888 if (!e) 2889 goto do_stall3; 2890 status = readl(&e->regs->ep_rsp) & 2891 BIT(CLEAR_ENDPOINT_HALT); 2892 writel(0, &dev->epregs[0].ep_irqenb); 2893 set_fifo_bytecount(ep, sizeof(status)); 2894 writel((__force u32) status, &dev->epregs[0].ep_data); 2895 allow_status_338x(ep); 2896 break; 2897 2898 default: 2899 goto usb3_delegate; 2900 } 2901 break; 2902 2903 case USB_REQ_CLEAR_FEATURE: 2904 switch (r.bRequestType) { 2905 case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE): 2906 if (!dev->addressed_state) { 2907 switch (w_value) { 2908 case USB_DEVICE_U1_ENABLE: 2909 dev->u1_enable = 0; 2910 writel(readl(&dev->usb_ext->usbctl2) & 2911 ~BIT(U1_ENABLE), 2912 &dev->usb_ext->usbctl2); 2913 allow_status_338x(ep); 2914 goto next_endpoints3; 2915 2916 case USB_DEVICE_U2_ENABLE: 2917 dev->u2_enable = 0; 2918 writel(readl(&dev->usb_ext->usbctl2) & 2919 ~BIT(U2_ENABLE), 2920 &dev->usb_ext->usbctl2); 2921 allow_status_338x(ep); 2922 goto next_endpoints3; 2923 2924 case USB_DEVICE_LTM_ENABLE: 2925 dev->ltm_enable = 0; 2926 writel(readl(&dev->usb_ext->usbctl2) & 2927 ~BIT(LTM_ENABLE), 2928 &dev->usb_ext->usbctl2); 2929 allow_status_338x(ep); 2930 goto next_endpoints3; 2931 2932 default: 2933 break; 2934 } 2935 } 2936 if (w_value == USB_DEVICE_REMOTE_WAKEUP) { 2937 dev->wakeup_enable = 0; 2938 writel(readl(&dev->usb->usbctl) & 2939 ~BIT(DEVICE_REMOTE_WAKEUP_ENABLE), 2940 &dev->usb->usbctl); 2941 allow_status_338x(ep); 2942 break; 2943 } 2944 goto usb3_delegate; 2945 2946 case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_ENDPOINT): 2947 e = get_ep_by_addr(dev, w_index); 2948 if (!e) 2949 goto do_stall3; 2950 if (w_value != USB_ENDPOINT_HALT) 2951 goto do_stall3; 2952 ep_vdbg(dev, "%s clear halt\n", e->ep.name); 2953 /* 2954 * Workaround for SS SeqNum not cleared via 2955 * Endpoint Halt (Clear) bit. select endpoint 2956 */ 2957 ep_clear_seqnum(e); 2958 clear_halt(e); 2959 if (!list_empty(&e->queue) && e->td_dma) 2960 restart_dma(e); 2961 allow_status(ep); 2962 ep->stopped = 1; 2963 break; 2964 2965 default: 2966 goto usb3_delegate; 2967 } 2968 break; 2969 case USB_REQ_SET_FEATURE: 2970 switch (r.bRequestType) { 2971 case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE): 2972 if (!dev->addressed_state) { 2973 switch (w_value) { 2974 case USB_DEVICE_U1_ENABLE: 2975 dev->u1_enable = 1; 2976 writel(readl(&dev->usb_ext->usbctl2) | 2977 BIT(U1_ENABLE), 2978 &dev->usb_ext->usbctl2); 2979 allow_status_338x(ep); 2980 goto next_endpoints3; 2981 2982 case USB_DEVICE_U2_ENABLE: 2983 dev->u2_enable = 1; 2984 writel(readl(&dev->usb_ext->usbctl2) | 2985 BIT(U2_ENABLE), 2986 &dev->usb_ext->usbctl2); 2987 allow_status_338x(ep); 2988 goto next_endpoints3; 2989 2990 case USB_DEVICE_LTM_ENABLE: 2991 dev->ltm_enable = 1; 2992 writel(readl(&dev->usb_ext->usbctl2) | 2993 BIT(LTM_ENABLE), 2994 &dev->usb_ext->usbctl2); 2995 allow_status_338x(ep); 2996 goto next_endpoints3; 2997 default: 2998 break; 2999 } 3000 } 3001 3002 if (w_value == USB_DEVICE_REMOTE_WAKEUP) { 3003 dev->wakeup_enable = 1; 3004 writel(readl(&dev->usb->usbctl) | 3005 BIT(DEVICE_REMOTE_WAKEUP_ENABLE), 3006 &dev->usb->usbctl); 3007 allow_status_338x(ep); 3008 break; 3009 } 3010 goto usb3_delegate; 3011 3012 case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_ENDPOINT): 3013 e = get_ep_by_addr(dev, w_index); 3014 if (!e || (w_value != USB_ENDPOINT_HALT)) 3015 goto do_stall3; 3016 ep->stopped = 1; 3017 if (ep->num == 0) 3018 ep->dev->protocol_stall = 1; 3019 else { 3020 if (ep->dma) 3021 abort_dma(ep); 3022 set_halt(ep); 3023 } 3024 allow_status_338x(ep); 3025 break; 3026 3027 default: 3028 goto usb3_delegate; 3029 } 3030 3031 break; 3032 default: 3033 3034 usb3_delegate: 3035 ep_vdbg(dev, "setup %02x.%02x v%04x i%04x l%04x ep_cfg %08x\n", 3036 r.bRequestType, r.bRequest, 3037 w_value, w_index, w_length, 3038 readl(&ep->cfg->ep_cfg)); 3039 3040 ep->responded = 0; 3041 spin_unlock(&dev->lock); 3042 tmp = dev->driver->setup(&dev->gadget, &r); 3043 spin_lock(&dev->lock); 3044 } 3045 do_stall3: 3046 if (tmp < 0) { 3047 ep_vdbg(dev, "req %02x.%02x protocol STALL; stat %d\n", 3048 r.bRequestType, r.bRequest, tmp); 3049 dev->protocol_stall = 1; 3050 /* TD 9.9 Halt Endpoint test. TD 9.22 Set feature test */ 3051 set_halt(ep); 3052 } 3053 3054 next_endpoints3: 3055 3056 #undef w_value 3057 #undef w_index 3058 #undef w_length 3059 3060 return; 3061 } 3062 3063 static void usb338x_handle_ep_intr(struct net2280 *dev, u32 stat0) 3064 { 3065 u32 index; 3066 u32 bit; 3067 3068 for (index = 0; index < ARRAY_SIZE(ep_bit); index++) { 3069 bit = BIT(ep_bit[index]); 3070 3071 if (!stat0) 3072 break; 3073 3074 if (!(stat0 & bit)) 3075 continue; 3076 3077 stat0 &= ~bit; 3078 3079 handle_ep_small(&dev->ep[index]); 3080 } 3081 } 3082 3083 static void handle_stat0_irqs(struct net2280 *dev, u32 stat) 3084 { 3085 struct net2280_ep *ep; 3086 u32 num, scratch; 3087 3088 /* most of these don't need individual acks */ 3089 stat &= ~BIT(INTA_ASSERTED); 3090 if (!stat) 3091 return; 3092 /* ep_dbg(dev, "irqstat0 %04x\n", stat); */ 3093 3094 /* starting a control request? */ 3095 if (unlikely(stat & BIT(SETUP_PACKET_INTERRUPT))) { 3096 union { 3097 u32 raw[2]; 3098 struct usb_ctrlrequest r; 3099 } u; 3100 int tmp; 3101 struct net2280_request *req; 3102 3103 if (dev->gadget.speed == USB_SPEED_UNKNOWN) { 3104 u32 val = readl(&dev->usb->usbstat); 3105 if (val & BIT(SUPER_SPEED)) { 3106 dev->gadget.speed = USB_SPEED_SUPER; 3107 usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 3108 EP0_SS_MAX_PACKET_SIZE); 3109 } else if (val & BIT(HIGH_SPEED)) { 3110 dev->gadget.speed = USB_SPEED_HIGH; 3111 usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 3112 EP0_HS_MAX_PACKET_SIZE); 3113 } else { 3114 dev->gadget.speed = USB_SPEED_FULL; 3115 usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 3116 EP0_HS_MAX_PACKET_SIZE); 3117 } 3118 net2280_led_speed(dev, dev->gadget.speed); 3119 ep_dbg(dev, "%s\n", 3120 usb_speed_string(dev->gadget.speed)); 3121 } 3122 3123 ep = &dev->ep[0]; 3124 ep->irqs++; 3125 3126 /* make sure any leftover request state is cleared */ 3127 stat &= ~BIT(ENDPOINT_0_INTERRUPT); 3128 while (!list_empty(&ep->queue)) { 3129 req = list_entry(ep->queue.next, 3130 struct net2280_request, queue); 3131 done(ep, req, (req->req.actual == req->req.length) 3132 ? 0 : -EPROTO); 3133 } 3134 ep->stopped = 0; 3135 dev->protocol_stall = 0; 3136 if (!(dev->quirks & PLX_PCIE)) { 3137 if (ep->dev->quirks & PLX_2280) 3138 tmp = BIT(FIFO_OVERFLOW) | 3139 BIT(FIFO_UNDERFLOW); 3140 else 3141 tmp = 0; 3142 3143 writel(tmp | BIT(TIMEOUT) | 3144 BIT(USB_STALL_SENT) | 3145 BIT(USB_IN_NAK_SENT) | 3146 BIT(USB_IN_ACK_RCVD) | 3147 BIT(USB_OUT_PING_NAK_SENT) | 3148 BIT(USB_OUT_ACK_SENT) | 3149 BIT(SHORT_PACKET_OUT_DONE_INTERRUPT) | 3150 BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT) | 3151 BIT(DATA_PACKET_RECEIVED_INTERRUPT) | 3152 BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) | 3153 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | 3154 BIT(DATA_IN_TOKEN_INTERRUPT), 3155 &ep->regs->ep_stat); 3156 } 3157 u.raw[0] = readl(&dev->usb->setup0123); 3158 u.raw[1] = readl(&dev->usb->setup4567); 3159 3160 cpu_to_le32s(&u.raw[0]); 3161 cpu_to_le32s(&u.raw[1]); 3162 3163 if ((dev->quirks & PLX_PCIE) && !dev->bug7734_patched) 3164 defect7374_workaround(dev, u.r); 3165 3166 tmp = 0; 3167 3168 #define w_value le16_to_cpu(u.r.wValue) 3169 #define w_index le16_to_cpu(u.r.wIndex) 3170 #define w_length le16_to_cpu(u.r.wLength) 3171 3172 /* ack the irq */ 3173 writel(BIT(SETUP_PACKET_INTERRUPT), &dev->regs->irqstat0); 3174 stat ^= BIT(SETUP_PACKET_INTERRUPT); 3175 3176 /* watch control traffic at the token level, and force 3177 * synchronization before letting the status stage happen. 3178 * FIXME ignore tokens we'll NAK, until driver responds. 3179 * that'll mean a lot less irqs for some drivers. 3180 */ 3181 ep->is_in = (u.r.bRequestType & USB_DIR_IN) != 0; 3182 if (ep->is_in) { 3183 scratch = BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) | 3184 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | 3185 BIT(DATA_IN_TOKEN_INTERRUPT); 3186 stop_out_naking(ep); 3187 } else 3188 scratch = BIT(DATA_PACKET_RECEIVED_INTERRUPT) | 3189 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | 3190 BIT(DATA_IN_TOKEN_INTERRUPT); 3191 writel(scratch, &dev->epregs[0].ep_irqenb); 3192 3193 /* we made the hardware handle most lowlevel requests; 3194 * everything else goes uplevel to the gadget code. 3195 */ 3196 ep->responded = 1; 3197 3198 if (dev->gadget.speed == USB_SPEED_SUPER) { 3199 handle_stat0_irqs_superspeed(dev, ep, u.r); 3200 goto next_endpoints; 3201 } 3202 3203 switch (u.r.bRequest) { 3204 case USB_REQ_GET_STATUS: { 3205 struct net2280_ep *e; 3206 __le32 status; 3207 3208 /* hw handles device and interface status */ 3209 if (u.r.bRequestType != (USB_DIR_IN|USB_RECIP_ENDPOINT)) 3210 goto delegate; 3211 e = get_ep_by_addr(dev, w_index); 3212 if (!e || w_length > 2) 3213 goto do_stall; 3214 3215 if (readl(&e->regs->ep_rsp) & BIT(SET_ENDPOINT_HALT)) 3216 status = cpu_to_le32(1); 3217 else 3218 status = cpu_to_le32(0); 3219 3220 /* don't bother with a request object! */ 3221 writel(0, &dev->epregs[0].ep_irqenb); 3222 set_fifo_bytecount(ep, w_length); 3223 writel((__force u32)status, &dev->epregs[0].ep_data); 3224 allow_status(ep); 3225 ep_vdbg(dev, "%s stat %02x\n", ep->ep.name, status); 3226 goto next_endpoints; 3227 } 3228 break; 3229 case USB_REQ_CLEAR_FEATURE: { 3230 struct net2280_ep *e; 3231 3232 /* hw handles device features */ 3233 if (u.r.bRequestType != USB_RECIP_ENDPOINT) 3234 goto delegate; 3235 if (w_value != USB_ENDPOINT_HALT || w_length != 0) 3236 goto do_stall; 3237 e = get_ep_by_addr(dev, w_index); 3238 if (!e) 3239 goto do_stall; 3240 if (e->wedged) { 3241 ep_vdbg(dev, "%s wedged, halt not cleared\n", 3242 ep->ep.name); 3243 } else { 3244 ep_vdbg(dev, "%s clear halt\n", e->ep.name); 3245 clear_halt(e); 3246 if ((ep->dev->quirks & PLX_PCIE) && 3247 !list_empty(&e->queue) && e->td_dma) 3248 restart_dma(e); 3249 } 3250 allow_status(ep); 3251 goto next_endpoints; 3252 } 3253 break; 3254 case USB_REQ_SET_FEATURE: { 3255 struct net2280_ep *e; 3256 3257 /* hw handles device features */ 3258 if (u.r.bRequestType != USB_RECIP_ENDPOINT) 3259 goto delegate; 3260 if (w_value != USB_ENDPOINT_HALT || w_length != 0) 3261 goto do_stall; 3262 e = get_ep_by_addr(dev, w_index); 3263 if (!e) 3264 goto do_stall; 3265 if (e->ep.name == ep0name) 3266 goto do_stall; 3267 set_halt(e); 3268 if ((dev->quirks & PLX_PCIE) && e->dma) 3269 abort_dma(e); 3270 allow_status(ep); 3271 ep_vdbg(dev, "%s set halt\n", ep->ep.name); 3272 goto next_endpoints; 3273 } 3274 break; 3275 default: 3276 delegate: 3277 ep_vdbg(dev, "setup %02x.%02x v%04x i%04x l%04x " 3278 "ep_cfg %08x\n", 3279 u.r.bRequestType, u.r.bRequest, 3280 w_value, w_index, w_length, 3281 readl(&ep->cfg->ep_cfg)); 3282 ep->responded = 0; 3283 spin_unlock(&dev->lock); 3284 tmp = dev->driver->setup(&dev->gadget, &u.r); 3285 spin_lock(&dev->lock); 3286 } 3287 3288 /* stall ep0 on error */ 3289 if (tmp < 0) { 3290 do_stall: 3291 ep_vdbg(dev, "req %02x.%02x protocol STALL; stat %d\n", 3292 u.r.bRequestType, u.r.bRequest, tmp); 3293 dev->protocol_stall = 1; 3294 } 3295 3296 /* some in/out token irq should follow; maybe stall then. 3297 * driver must queue a request (even zlp) or halt ep0 3298 * before the host times out. 3299 */ 3300 } 3301 3302 #undef w_value 3303 #undef w_index 3304 #undef w_length 3305 3306 next_endpoints: 3307 if ((dev->quirks & PLX_PCIE) && dev->enhanced_mode) { 3308 u32 mask = (BIT(ENDPOINT_0_INTERRUPT) | 3309 USB3380_IRQSTAT0_EP_INTR_MASK_IN | 3310 USB3380_IRQSTAT0_EP_INTR_MASK_OUT); 3311 3312 if (stat & mask) { 3313 usb338x_handle_ep_intr(dev, stat & mask); 3314 stat &= ~mask; 3315 } 3316 } else { 3317 /* endpoint data irq ? */ 3318 scratch = stat & 0x7f; 3319 stat &= ~0x7f; 3320 for (num = 0; scratch; num++) { 3321 u32 t; 3322 3323 /* do this endpoint's FIFO and queue need tending? */ 3324 t = BIT(num); 3325 if ((scratch & t) == 0) 3326 continue; 3327 scratch ^= t; 3328 3329 ep = &dev->ep[num]; 3330 handle_ep_small(ep); 3331 } 3332 } 3333 3334 if (stat) 3335 ep_dbg(dev, "unhandled irqstat0 %08x\n", stat); 3336 } 3337 3338 #define DMA_INTERRUPTS (BIT(DMA_D_INTERRUPT) | \ 3339 BIT(DMA_C_INTERRUPT) | \ 3340 BIT(DMA_B_INTERRUPT) | \ 3341 BIT(DMA_A_INTERRUPT)) 3342 #define PCI_ERROR_INTERRUPTS ( \ 3343 BIT(PCI_MASTER_ABORT_RECEIVED_INTERRUPT) | \ 3344 BIT(PCI_TARGET_ABORT_RECEIVED_INTERRUPT) | \ 3345 BIT(PCI_RETRY_ABORT_INTERRUPT)) 3346 3347 static void handle_stat1_irqs(struct net2280 *dev, u32 stat) 3348 { 3349 struct net2280_ep *ep; 3350 u32 tmp, num, mask, scratch; 3351 3352 /* after disconnect there's nothing else to do! */ 3353 tmp = BIT(VBUS_INTERRUPT) | BIT(ROOT_PORT_RESET_INTERRUPT); 3354 mask = BIT(SUPER_SPEED) | BIT(HIGH_SPEED) | BIT(FULL_SPEED); 3355 3356 /* VBUS disconnect is indicated by VBUS_PIN and VBUS_INTERRUPT set. 3357 * Root Port Reset is indicated by ROOT_PORT_RESET_INTERRUPT set and 3358 * both HIGH_SPEED and FULL_SPEED clear (as ROOT_PORT_RESET_INTERRUPT 3359 * only indicates a change in the reset state). 3360 */ 3361 if (stat & tmp) { 3362 bool reset = false; 3363 bool disconnect = false; 3364 3365 /* 3366 * Ignore disconnects and resets if the speed hasn't been set. 3367 * VBUS can bounce and there's always an initial reset. 3368 */ 3369 writel(tmp, &dev->regs->irqstat1); 3370 if (dev->gadget.speed != USB_SPEED_UNKNOWN) { 3371 if ((stat & BIT(VBUS_INTERRUPT)) && 3372 (readl(&dev->usb->usbctl) & 3373 BIT(VBUS_PIN)) == 0) { 3374 disconnect = true; 3375 ep_dbg(dev, "disconnect %s\n", 3376 dev->driver->driver.name); 3377 } else if ((stat & BIT(ROOT_PORT_RESET_INTERRUPT)) && 3378 (readl(&dev->usb->usbstat) & mask) 3379 == 0) { 3380 reset = true; 3381 ep_dbg(dev, "reset %s\n", 3382 dev->driver->driver.name); 3383 } 3384 3385 if (disconnect || reset) { 3386 stop_activity(dev, dev->driver); 3387 ep0_start(dev); 3388 if (reset) 3389 usb_gadget_udc_reset 3390 (&dev->gadget, dev->driver); 3391 else 3392 (dev->driver->disconnect) 3393 (&dev->gadget); 3394 return; 3395 } 3396 } 3397 stat &= ~tmp; 3398 3399 /* vBUS can bounce ... one of many reasons to ignore the 3400 * notion of hotplug events on bus connect/disconnect! 3401 */ 3402 if (!stat) 3403 return; 3404 } 3405 3406 /* NOTE: chip stays in PCI D0 state for now, but it could 3407 * enter D1 to save more power 3408 */ 3409 tmp = BIT(SUSPEND_REQUEST_CHANGE_INTERRUPT); 3410 if (stat & tmp) { 3411 writel(tmp, &dev->regs->irqstat1); 3412 if (stat & BIT(SUSPEND_REQUEST_INTERRUPT)) { 3413 if (dev->driver->suspend) 3414 dev->driver->suspend(&dev->gadget); 3415 if (!enable_suspend) 3416 stat &= ~BIT(SUSPEND_REQUEST_INTERRUPT); 3417 } else { 3418 if (dev->driver->resume) 3419 dev->driver->resume(&dev->gadget); 3420 /* at high speed, note erratum 0133 */ 3421 } 3422 stat &= ~tmp; 3423 } 3424 3425 /* clear any other status/irqs */ 3426 if (stat) 3427 writel(stat, &dev->regs->irqstat1); 3428 3429 /* some status we can just ignore */ 3430 if (dev->quirks & PLX_2280) 3431 stat &= ~(BIT(CONTROL_STATUS_INTERRUPT) | 3432 BIT(SUSPEND_REQUEST_INTERRUPT) | 3433 BIT(RESUME_INTERRUPT) | 3434 BIT(SOF_INTERRUPT)); 3435 else 3436 stat &= ~(BIT(CONTROL_STATUS_INTERRUPT) | 3437 BIT(RESUME_INTERRUPT) | 3438 BIT(SOF_DOWN_INTERRUPT) | 3439 BIT(SOF_INTERRUPT)); 3440 3441 if (!stat) 3442 return; 3443 /* ep_dbg(dev, "irqstat1 %08x\n", stat);*/ 3444 3445 /* DMA status, for ep-{a,b,c,d} */ 3446 scratch = stat & DMA_INTERRUPTS; 3447 stat &= ~DMA_INTERRUPTS; 3448 scratch >>= 9; 3449 for (num = 0; scratch; num++) { 3450 struct net2280_dma_regs __iomem *dma; 3451 3452 tmp = BIT(num); 3453 if ((tmp & scratch) == 0) 3454 continue; 3455 scratch ^= tmp; 3456 3457 ep = &dev->ep[num + 1]; 3458 dma = ep->dma; 3459 3460 if (!dma) 3461 continue; 3462 3463 /* clear ep's dma status */ 3464 tmp = readl(&dma->dmastat); 3465 writel(tmp, &dma->dmastat); 3466 3467 /* dma sync*/ 3468 if (dev->quirks & PLX_PCIE) { 3469 u32 r_dmacount = readl(&dma->dmacount); 3470 if (!ep->is_in && (r_dmacount & 0x00FFFFFF) && 3471 (tmp & BIT(DMA_TRANSACTION_DONE_INTERRUPT))) 3472 continue; 3473 } 3474 3475 if (!(tmp & BIT(DMA_TRANSACTION_DONE_INTERRUPT))) { 3476 ep_dbg(ep->dev, "%s no xact done? %08x\n", 3477 ep->ep.name, tmp); 3478 continue; 3479 } 3480 stop_dma(ep->dma); 3481 3482 /* OUT transfers terminate when the data from the 3483 * host is in our memory. Process whatever's done. 3484 * On this path, we know transfer's last packet wasn't 3485 * less than req->length. NAK_OUT_PACKETS may be set, 3486 * or the FIFO may already be holding new packets. 3487 * 3488 * IN transfers can linger in the FIFO for a very 3489 * long time ... we ignore that for now, accounting 3490 * precisely (like PIO does) needs per-packet irqs 3491 */ 3492 scan_dma_completions(ep); 3493 3494 /* disable dma on inactive queues; else maybe restart */ 3495 if (!list_empty(&ep->queue)) { 3496 tmp = readl(&dma->dmactl); 3497 restart_dma(ep); 3498 } 3499 ep->irqs++; 3500 } 3501 3502 /* NOTE: there are other PCI errors we might usefully notice. 3503 * if they appear very often, here's where to try recovering. 3504 */ 3505 if (stat & PCI_ERROR_INTERRUPTS) { 3506 ep_err(dev, "pci dma error; stat %08x\n", stat); 3507 stat &= ~PCI_ERROR_INTERRUPTS; 3508 /* these are fatal errors, but "maybe" they won't 3509 * happen again ... 3510 */ 3511 stop_activity(dev, dev->driver); 3512 ep0_start(dev); 3513 stat = 0; 3514 } 3515 3516 if (stat) 3517 ep_dbg(dev, "unhandled irqstat1 %08x\n", stat); 3518 } 3519 3520 static irqreturn_t net2280_irq(int irq, void *_dev) 3521 { 3522 struct net2280 *dev = _dev; 3523 3524 /* shared interrupt, not ours */ 3525 if ((dev->quirks & PLX_LEGACY) && 3526 (!(readl(&dev->regs->irqstat0) & BIT(INTA_ASSERTED)))) 3527 return IRQ_NONE; 3528 3529 spin_lock(&dev->lock); 3530 3531 /* handle disconnect, dma, and more */ 3532 handle_stat1_irqs(dev, readl(&dev->regs->irqstat1)); 3533 3534 /* control requests and PIO */ 3535 handle_stat0_irqs(dev, readl(&dev->regs->irqstat0)); 3536 3537 if (dev->quirks & PLX_PCIE) { 3538 /* re-enable interrupt to trigger any possible new interrupt */ 3539 u32 pciirqenb1 = readl(&dev->regs->pciirqenb1); 3540 writel(pciirqenb1 & 0x7FFFFFFF, &dev->regs->pciirqenb1); 3541 writel(pciirqenb1, &dev->regs->pciirqenb1); 3542 } 3543 3544 spin_unlock(&dev->lock); 3545 3546 return IRQ_HANDLED; 3547 } 3548 3549 /*-------------------------------------------------------------------------*/ 3550 3551 static void gadget_release(struct device *_dev) 3552 { 3553 struct net2280 *dev = dev_get_drvdata(_dev); 3554 3555 kfree(dev); 3556 } 3557 3558 /* tear down the binding between this driver and the pci device */ 3559 3560 static void net2280_remove(struct pci_dev *pdev) 3561 { 3562 struct net2280 *dev = pci_get_drvdata(pdev); 3563 3564 usb_del_gadget_udc(&dev->gadget); 3565 3566 BUG_ON(dev->driver); 3567 3568 /* then clean up the resources we allocated during probe() */ 3569 if (dev->requests) { 3570 int i; 3571 for (i = 1; i < 5; i++) { 3572 if (!dev->ep[i].dummy) 3573 continue; 3574 dma_pool_free(dev->requests, dev->ep[i].dummy, 3575 dev->ep[i].td_dma); 3576 } 3577 dma_pool_destroy(dev->requests); 3578 } 3579 if (dev->got_irq) 3580 free_irq(pdev->irq, dev); 3581 if (dev->quirks & PLX_PCIE) 3582 pci_disable_msi(pdev); 3583 if (dev->regs) { 3584 net2280_led_shutdown(dev); 3585 iounmap(dev->regs); 3586 } 3587 if (dev->region) 3588 release_mem_region(pci_resource_start(pdev, 0), 3589 pci_resource_len(pdev, 0)); 3590 if (dev->enabled) 3591 pci_disable_device(pdev); 3592 device_remove_file(&pdev->dev, &dev_attr_registers); 3593 3594 ep_info(dev, "unbind\n"); 3595 } 3596 3597 /* wrap this driver around the specified device, but 3598 * don't respond over USB until a gadget driver binds to us. 3599 */ 3600 3601 static int net2280_probe(struct pci_dev *pdev, const struct pci_device_id *id) 3602 { 3603 struct net2280 *dev; 3604 unsigned long resource, len; 3605 void __iomem *base = NULL; 3606 int retval, i; 3607 3608 /* alloc, and start init */ 3609 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 3610 if (dev == NULL) { 3611 retval = -ENOMEM; 3612 goto done; 3613 } 3614 3615 pci_set_drvdata(pdev, dev); 3616 spin_lock_init(&dev->lock); 3617 dev->quirks = id->driver_data; 3618 dev->pdev = pdev; 3619 dev->gadget.ops = &net2280_ops; 3620 dev->gadget.max_speed = (dev->quirks & PLX_SUPERSPEED) ? 3621 USB_SPEED_SUPER : USB_SPEED_HIGH; 3622 3623 /* the "gadget" abstracts/virtualizes the controller */ 3624 dev->gadget.name = driver_name; 3625 3626 /* now all the pci goodies ... */ 3627 if (pci_enable_device(pdev) < 0) { 3628 retval = -ENODEV; 3629 goto done; 3630 } 3631 dev->enabled = 1; 3632 3633 /* BAR 0 holds all the registers 3634 * BAR 1 is 8051 memory; unused here (note erratum 0103) 3635 * BAR 2 is fifo memory; unused here 3636 */ 3637 resource = pci_resource_start(pdev, 0); 3638 len = pci_resource_len(pdev, 0); 3639 if (!request_mem_region(resource, len, driver_name)) { 3640 ep_dbg(dev, "controller already in use\n"); 3641 retval = -EBUSY; 3642 goto done; 3643 } 3644 dev->region = 1; 3645 3646 /* FIXME provide firmware download interface to put 3647 * 8051 code into the chip, e.g. to turn on PCI PM. 3648 */ 3649 3650 base = ioremap_nocache(resource, len); 3651 if (base == NULL) { 3652 ep_dbg(dev, "can't map memory\n"); 3653 retval = -EFAULT; 3654 goto done; 3655 } 3656 dev->regs = (struct net2280_regs __iomem *) base; 3657 dev->usb = (struct net2280_usb_regs __iomem *) (base + 0x0080); 3658 dev->pci = (struct net2280_pci_regs __iomem *) (base + 0x0100); 3659 dev->dma = (struct net2280_dma_regs __iomem *) (base + 0x0180); 3660 dev->dep = (struct net2280_dep_regs __iomem *) (base + 0x0200); 3661 dev->epregs = (struct net2280_ep_regs __iomem *) (base + 0x0300); 3662 3663 if (dev->quirks & PLX_PCIE) { 3664 u32 fsmvalue; 3665 u32 usbstat; 3666 dev->usb_ext = (struct usb338x_usb_ext_regs __iomem *) 3667 (base + 0x00b4); 3668 dev->llregs = (struct usb338x_ll_regs __iomem *) 3669 (base + 0x0700); 3670 dev->ll_lfps_regs = (struct usb338x_ll_lfps_regs __iomem *) 3671 (base + 0x0748); 3672 dev->ll_tsn_regs = (struct usb338x_ll_tsn_regs __iomem *) 3673 (base + 0x077c); 3674 dev->ll_chicken_reg = (struct usb338x_ll_chi_regs __iomem *) 3675 (base + 0x079c); 3676 dev->plregs = (struct usb338x_pl_regs __iomem *) 3677 (base + 0x0800); 3678 usbstat = readl(&dev->usb->usbstat); 3679 dev->enhanced_mode = !!(usbstat & BIT(11)); 3680 dev->n_ep = (dev->enhanced_mode) ? 9 : 5; 3681 /* put into initial config, link up all endpoints */ 3682 fsmvalue = get_idx_reg(dev->regs, SCRATCH) & 3683 (0xf << DEFECT7374_FSM_FIELD); 3684 /* See if firmware needs to set up for workaround: */ 3685 if (fsmvalue == DEFECT7374_FSM_SS_CONTROL_READ) { 3686 dev->bug7734_patched = 1; 3687 writel(0, &dev->usb->usbctl); 3688 } else 3689 dev->bug7734_patched = 0; 3690 } else { 3691 dev->enhanced_mode = 0; 3692 dev->n_ep = 7; 3693 /* put into initial config, link up all endpoints */ 3694 writel(0, &dev->usb->usbctl); 3695 } 3696 3697 usb_reset(dev); 3698 usb_reinit(dev); 3699 3700 /* irq setup after old hardware is cleaned up */ 3701 if (!pdev->irq) { 3702 ep_err(dev, "No IRQ. Check PCI setup!\n"); 3703 retval = -ENODEV; 3704 goto done; 3705 } 3706 3707 if (dev->quirks & PLX_PCIE) 3708 if (pci_enable_msi(pdev)) 3709 ep_err(dev, "Failed to enable MSI mode\n"); 3710 3711 if (request_irq(pdev->irq, net2280_irq, IRQF_SHARED, 3712 driver_name, dev)) { 3713 ep_err(dev, "request interrupt %d failed\n", pdev->irq); 3714 retval = -EBUSY; 3715 goto done; 3716 } 3717 dev->got_irq = 1; 3718 3719 /* DMA setup */ 3720 /* NOTE: we know only the 32 LSBs of dma addresses may be nonzero */ 3721 dev->requests = dma_pool_create("requests", &pdev->dev, 3722 sizeof(struct net2280_dma), 3723 0 /* no alignment requirements */, 3724 0 /* or page-crossing issues */); 3725 if (!dev->requests) { 3726 ep_dbg(dev, "can't get request pool\n"); 3727 retval = -ENOMEM; 3728 goto done; 3729 } 3730 for (i = 1; i < 5; i++) { 3731 struct net2280_dma *td; 3732 3733 td = dma_pool_alloc(dev->requests, GFP_KERNEL, 3734 &dev->ep[i].td_dma); 3735 if (!td) { 3736 ep_dbg(dev, "can't get dummy %d\n", i); 3737 retval = -ENOMEM; 3738 goto done; 3739 } 3740 td->dmacount = 0; /* not VALID */ 3741 td->dmadesc = td->dmaaddr; 3742 dev->ep[i].dummy = td; 3743 } 3744 3745 /* enable lower-overhead pci memory bursts during DMA */ 3746 if (dev->quirks & PLX_LEGACY) 3747 writel(BIT(DMA_MEMORY_WRITE_AND_INVALIDATE_ENABLE) | 3748 /* 3749 * 256 write retries may not be enough... 3750 BIT(PCI_RETRY_ABORT_ENABLE) | 3751 */ 3752 BIT(DMA_READ_MULTIPLE_ENABLE) | 3753 BIT(DMA_READ_LINE_ENABLE), 3754 &dev->pci->pcimstctl); 3755 /* erratum 0115 shouldn't appear: Linux inits PCI_LATENCY_TIMER */ 3756 pci_set_master(pdev); 3757 pci_try_set_mwi(pdev); 3758 3759 /* ... also flushes any posted pci writes */ 3760 dev->chiprev = get_idx_reg(dev->regs, REG_CHIPREV) & 0xffff; 3761 3762 /* done */ 3763 ep_info(dev, "%s\n", driver_desc); 3764 ep_info(dev, "irq %d, pci mem %p, chip rev %04x\n", 3765 pdev->irq, base, dev->chiprev); 3766 ep_info(dev, "version: " DRIVER_VERSION "; %s\n", 3767 dev->enhanced_mode ? "enhanced mode" : "legacy mode"); 3768 retval = device_create_file(&pdev->dev, &dev_attr_registers); 3769 if (retval) 3770 goto done; 3771 3772 retval = usb_add_gadget_udc_release(&pdev->dev, &dev->gadget, 3773 gadget_release); 3774 if (retval) 3775 goto done; 3776 return 0; 3777 3778 done: 3779 if (dev) 3780 net2280_remove(pdev); 3781 return retval; 3782 } 3783 3784 /* make sure the board is quiescent; otherwise it will continue 3785 * generating IRQs across the upcoming reboot. 3786 */ 3787 3788 static void net2280_shutdown(struct pci_dev *pdev) 3789 { 3790 struct net2280 *dev = pci_get_drvdata(pdev); 3791 3792 /* disable IRQs */ 3793 writel(0, &dev->regs->pciirqenb0); 3794 writel(0, &dev->regs->pciirqenb1); 3795 3796 /* disable the pullup so the host will think we're gone */ 3797 writel(0, &dev->usb->usbctl); 3798 3799 } 3800 3801 3802 /*-------------------------------------------------------------------------*/ 3803 3804 static const struct pci_device_id pci_ids[] = { { 3805 .class = PCI_CLASS_SERIAL_USB_DEVICE, 3806 .class_mask = ~0, 3807 .vendor = PCI_VENDOR_ID_PLX_LEGACY, 3808 .device = 0x2280, 3809 .subvendor = PCI_ANY_ID, 3810 .subdevice = PCI_ANY_ID, 3811 .driver_data = PLX_LEGACY | PLX_2280, 3812 }, { 3813 .class = PCI_CLASS_SERIAL_USB_DEVICE, 3814 .class_mask = ~0, 3815 .vendor = PCI_VENDOR_ID_PLX_LEGACY, 3816 .device = 0x2282, 3817 .subvendor = PCI_ANY_ID, 3818 .subdevice = PCI_ANY_ID, 3819 .driver_data = PLX_LEGACY, 3820 }, 3821 { 3822 .class = PCI_CLASS_SERIAL_USB_DEVICE, 3823 .class_mask = ~0, 3824 .vendor = PCI_VENDOR_ID_PLX, 3825 .device = 0x2380, 3826 .subvendor = PCI_ANY_ID, 3827 .subdevice = PCI_ANY_ID, 3828 .driver_data = PLX_PCIE, 3829 }, 3830 { 3831 .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), 3832 .class_mask = ~0, 3833 .vendor = PCI_VENDOR_ID_PLX, 3834 .device = 0x3380, 3835 .subvendor = PCI_ANY_ID, 3836 .subdevice = PCI_ANY_ID, 3837 .driver_data = PLX_PCIE | PLX_SUPERSPEED, 3838 }, 3839 { 3840 .class = PCI_CLASS_SERIAL_USB_DEVICE, 3841 .class_mask = ~0, 3842 .vendor = PCI_VENDOR_ID_PLX, 3843 .device = 0x3382, 3844 .subvendor = PCI_ANY_ID, 3845 .subdevice = PCI_ANY_ID, 3846 .driver_data = PLX_PCIE | PLX_SUPERSPEED, 3847 }, 3848 { /* end: all zeroes */ } 3849 }; 3850 MODULE_DEVICE_TABLE(pci, pci_ids); 3851 3852 /* pci driver glue; this is a "new style" PCI driver module */ 3853 static struct pci_driver net2280_pci_driver = { 3854 .name = (char *) driver_name, 3855 .id_table = pci_ids, 3856 3857 .probe = net2280_probe, 3858 .remove = net2280_remove, 3859 .shutdown = net2280_shutdown, 3860 3861 /* FIXME add power management support */ 3862 }; 3863 3864 module_pci_driver(net2280_pci_driver); 3865 3866 MODULE_DESCRIPTION(DRIVER_DESC); 3867 MODULE_AUTHOR("David Brownell"); 3868 MODULE_LICENSE("GPL"); 3869