1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * aspeed-vhub -- Driver for Aspeed SoC "vHub" USB gadget 4 * 5 * hub.c - virtual hub handling 6 * 7 * Copyright 2017 IBM Corporation 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/module.h> 12 #include <linux/platform_device.h> 13 #include <linux/delay.h> 14 #include <linux/ioport.h> 15 #include <linux/slab.h> 16 #include <linux/errno.h> 17 #include <linux/list.h> 18 #include <linux/interrupt.h> 19 #include <linux/proc_fs.h> 20 #include <linux/prefetch.h> 21 #include <linux/clk.h> 22 #include <linux/usb/gadget.h> 23 #include <linux/of.h> 24 #include <linux/of_gpio.h> 25 #include <linux/regmap.h> 26 #include <linux/dma-mapping.h> 27 #include <linux/bcd.h> 28 #include <linux/version.h> 29 #include <linux/usb.h> 30 #include <linux/usb/hcd.h> 31 32 #include "vhub.h" 33 34 /* usb 2.0 hub device descriptor 35 * 36 * A few things we may want to improve here: 37 * 38 * - We may need to indicate TT support 39 * - We may need a device qualifier descriptor 40 * as devices can pretend to be usb1 or 2 41 * - Make vid/did overridable 42 * - make it look like usb1 if usb1 mode forced 43 */ 44 #define KERNEL_REL bin2bcd(LINUX_VERSION_MAJOR) 45 #define KERNEL_VER bin2bcd(LINUX_VERSION_PATCHLEVEL) 46 47 enum { 48 AST_VHUB_STR_INDEX_MAX = 4, 49 AST_VHUB_STR_MANUF = 3, 50 AST_VHUB_STR_PRODUCT = 2, 51 AST_VHUB_STR_SERIAL = 1, 52 }; 53 54 static const struct usb_device_descriptor ast_vhub_dev_desc = { 55 .bLength = USB_DT_DEVICE_SIZE, 56 .bDescriptorType = USB_DT_DEVICE, 57 .bcdUSB = cpu_to_le16(0x0200), 58 .bDeviceClass = USB_CLASS_HUB, 59 .bDeviceSubClass = 0, 60 .bDeviceProtocol = 1, 61 .bMaxPacketSize0 = 64, 62 .idVendor = cpu_to_le16(0x1d6b), 63 .idProduct = cpu_to_le16(0x0107), 64 .bcdDevice = cpu_to_le16(0x0100), 65 .iManufacturer = AST_VHUB_STR_MANUF, 66 .iProduct = AST_VHUB_STR_PRODUCT, 67 .iSerialNumber = AST_VHUB_STR_SERIAL, 68 .bNumConfigurations = 1, 69 }; 70 71 static const struct usb_qualifier_descriptor ast_vhub_qual_desc = { 72 .bLength = 0xA, 73 .bDescriptorType = USB_DT_DEVICE_QUALIFIER, 74 .bcdUSB = cpu_to_le16(0x0200), 75 .bDeviceClass = USB_CLASS_HUB, 76 .bDeviceSubClass = 0, 77 .bDeviceProtocol = 0, 78 .bMaxPacketSize0 = 64, 79 .bNumConfigurations = 1, 80 .bRESERVED = 0, 81 }; 82 83 /* 84 * Configuration descriptor: same comments as above 85 * regarding handling USB1 mode. 86 */ 87 88 /* 89 * We don't use sizeof() as Linux definition of 90 * struct usb_endpoint_descriptor contains 2 91 * extra bytes 92 */ 93 #define AST_VHUB_CONF_DESC_SIZE (USB_DT_CONFIG_SIZE + \ 94 USB_DT_INTERFACE_SIZE + \ 95 USB_DT_ENDPOINT_SIZE) 96 97 static const struct ast_vhub_full_cdesc ast_vhub_conf_desc = { 98 .cfg = { 99 .bLength = USB_DT_CONFIG_SIZE, 100 .bDescriptorType = USB_DT_CONFIG, 101 .wTotalLength = cpu_to_le16(AST_VHUB_CONF_DESC_SIZE), 102 .bNumInterfaces = 1, 103 .bConfigurationValue = 1, 104 .iConfiguration = 0, 105 .bmAttributes = USB_CONFIG_ATT_ONE | 106 USB_CONFIG_ATT_SELFPOWER | 107 USB_CONFIG_ATT_WAKEUP, 108 .bMaxPower = 0, 109 }, 110 .intf = { 111 .bLength = USB_DT_INTERFACE_SIZE, 112 .bDescriptorType = USB_DT_INTERFACE, 113 .bInterfaceNumber = 0, 114 .bAlternateSetting = 0, 115 .bNumEndpoints = 1, 116 .bInterfaceClass = USB_CLASS_HUB, 117 .bInterfaceSubClass = 0, 118 .bInterfaceProtocol = 0, 119 .iInterface = 0, 120 }, 121 .ep = { 122 .bLength = USB_DT_ENDPOINT_SIZE, 123 .bDescriptorType = USB_DT_ENDPOINT, 124 .bEndpointAddress = 0x81, 125 .bmAttributes = USB_ENDPOINT_XFER_INT, 126 .wMaxPacketSize = cpu_to_le16(1), 127 .bInterval = 0x0c, 128 }, 129 }; 130 131 #define AST_VHUB_HUB_DESC_SIZE (USB_DT_HUB_NONVAR_SIZE + 2) 132 133 static const struct usb_hub_descriptor ast_vhub_hub_desc = { 134 .bDescLength = AST_VHUB_HUB_DESC_SIZE, 135 .bDescriptorType = USB_DT_HUB, 136 .bNbrPorts = AST_VHUB_NUM_PORTS, 137 .wHubCharacteristics = cpu_to_le16(HUB_CHAR_NO_LPSM), 138 .bPwrOn2PwrGood = 10, 139 .bHubContrCurrent = 0, 140 .u.hs.DeviceRemovable[0] = 0, 141 .u.hs.DeviceRemovable[1] = 0xff, 142 }; 143 144 /* 145 * These strings converted to UTF-16 must be smaller than 146 * our EP0 buffer. 147 */ 148 static const struct usb_string ast_vhub_str_array[] = { 149 { 150 .id = AST_VHUB_STR_SERIAL, 151 .s = "00000000" 152 }, 153 { 154 .id = AST_VHUB_STR_PRODUCT, 155 .s = "USB Virtual Hub" 156 }, 157 { 158 .id = AST_VHUB_STR_MANUF, 159 .s = "Aspeed" 160 }, 161 { } 162 }; 163 164 static const struct usb_gadget_strings ast_vhub_strings = { 165 .language = 0x0409, 166 .strings = (struct usb_string *)ast_vhub_str_array 167 }; 168 169 static int ast_vhub_hub_dev_status(struct ast_vhub_ep *ep, 170 u16 wIndex, u16 wValue) 171 { 172 u8 st0; 173 174 EPDBG(ep, "GET_STATUS(dev)\n"); 175 176 /* 177 * Mark it as self-powered, I doubt the BMC is powered off 178 * the USB bus ... 179 */ 180 st0 = 1 << USB_DEVICE_SELF_POWERED; 181 182 /* 183 * Need to double check how remote wakeup actually works 184 * on that chip and what triggers it. 185 */ 186 if (ep->vhub->wakeup_en) 187 st0 |= 1 << USB_DEVICE_REMOTE_WAKEUP; 188 189 return ast_vhub_simple_reply(ep, st0, 0); 190 } 191 192 static int ast_vhub_hub_ep_status(struct ast_vhub_ep *ep, 193 u16 wIndex, u16 wValue) 194 { 195 int ep_num; 196 u8 st0 = 0; 197 198 ep_num = wIndex & USB_ENDPOINT_NUMBER_MASK; 199 EPDBG(ep, "GET_STATUS(ep%d)\n", ep_num); 200 201 /* On the hub we have only EP 0 and 1 */ 202 if (ep_num == 1) { 203 if (ep->vhub->ep1_stalled) 204 st0 |= 1 << USB_ENDPOINT_HALT; 205 } else if (ep_num != 0) 206 return std_req_stall; 207 208 return ast_vhub_simple_reply(ep, st0, 0); 209 } 210 211 static int ast_vhub_hub_dev_feature(struct ast_vhub_ep *ep, 212 u16 wIndex, u16 wValue, 213 bool is_set) 214 { 215 u32 val; 216 217 EPDBG(ep, "%s_FEATURE(dev val=%02x)\n", 218 is_set ? "SET" : "CLEAR", wValue); 219 220 if (wValue == USB_DEVICE_REMOTE_WAKEUP) { 221 ep->vhub->wakeup_en = is_set; 222 EPDBG(ep, "Hub remote wakeup %s\n", 223 is_set ? "enabled" : "disabled"); 224 return std_req_complete; 225 } 226 227 if (wValue == USB_DEVICE_TEST_MODE) { 228 val = readl(ep->vhub->regs + AST_VHUB_CTRL); 229 val &= ~GENMASK(10, 8); 230 val |= VHUB_CTRL_SET_TEST_MODE((wIndex >> 8) & 0x7); 231 writel(val, ep->vhub->regs + AST_VHUB_CTRL); 232 233 return std_req_complete; 234 } 235 236 return std_req_stall; 237 } 238 239 static int ast_vhub_hub_ep_feature(struct ast_vhub_ep *ep, 240 u16 wIndex, u16 wValue, 241 bool is_set) 242 { 243 int ep_num; 244 u32 reg; 245 246 ep_num = wIndex & USB_ENDPOINT_NUMBER_MASK; 247 EPDBG(ep, "%s_FEATURE(ep%d val=%02x)\n", 248 is_set ? "SET" : "CLEAR", ep_num, wValue); 249 250 if (ep_num > 1) 251 return std_req_stall; 252 if (wValue != USB_ENDPOINT_HALT) 253 return std_req_stall; 254 if (ep_num == 0) 255 return std_req_complete; 256 257 EPDBG(ep, "%s stall on EP 1\n", 258 is_set ? "setting" : "clearing"); 259 260 ep->vhub->ep1_stalled = is_set; 261 reg = readl(ep->vhub->regs + AST_VHUB_EP1_CTRL); 262 if (is_set) { 263 reg |= VHUB_EP1_CTRL_STALL; 264 } else { 265 reg &= ~VHUB_EP1_CTRL_STALL; 266 reg |= VHUB_EP1_CTRL_RESET_TOGGLE; 267 } 268 writel(reg, ep->vhub->regs + AST_VHUB_EP1_CTRL); 269 270 return std_req_complete; 271 } 272 273 static int ast_vhub_rep_desc(struct ast_vhub_ep *ep, 274 u8 desc_type, u16 len) 275 { 276 size_t dsize; 277 struct ast_vhub *vhub = ep->vhub; 278 279 EPDBG(ep, "GET_DESCRIPTOR(type:%d)\n", desc_type); 280 281 /* 282 * Copy first to EP buffer and send from there, so 283 * we can do some in-place patching if needed. We know 284 * the EP buffer is big enough but ensure that doesn't 285 * change. We do that now rather than later after we 286 * have checked sizes etc... to avoid a gcc bug where 287 * it thinks len is constant and barfs about read 288 * overflows in memcpy. 289 */ 290 switch(desc_type) { 291 case USB_DT_DEVICE: 292 dsize = USB_DT_DEVICE_SIZE; 293 memcpy(ep->buf, &vhub->vhub_dev_desc, dsize); 294 BUILD_BUG_ON(dsize > sizeof(vhub->vhub_dev_desc)); 295 BUILD_BUG_ON(USB_DT_DEVICE_SIZE >= AST_VHUB_EP0_MAX_PACKET); 296 break; 297 case USB_DT_OTHER_SPEED_CONFIG: 298 case USB_DT_CONFIG: 299 dsize = AST_VHUB_CONF_DESC_SIZE; 300 memcpy(ep->buf, &vhub->vhub_conf_desc, dsize); 301 ((u8 *)ep->buf)[1] = desc_type; 302 BUILD_BUG_ON(dsize > sizeof(vhub->vhub_conf_desc)); 303 BUILD_BUG_ON(AST_VHUB_CONF_DESC_SIZE >= AST_VHUB_EP0_MAX_PACKET); 304 break; 305 case USB_DT_HUB: 306 dsize = AST_VHUB_HUB_DESC_SIZE; 307 memcpy(ep->buf, &vhub->vhub_hub_desc, dsize); 308 BUILD_BUG_ON(dsize > sizeof(vhub->vhub_hub_desc)); 309 BUILD_BUG_ON(AST_VHUB_HUB_DESC_SIZE >= AST_VHUB_EP0_MAX_PACKET); 310 break; 311 case USB_DT_DEVICE_QUALIFIER: 312 dsize = sizeof(vhub->vhub_qual_desc); 313 memcpy(ep->buf, &vhub->vhub_qual_desc, dsize); 314 break; 315 default: 316 return std_req_stall; 317 } 318 319 /* Crop requested length */ 320 if (len > dsize) 321 len = dsize; 322 323 /* Shoot it from the EP buffer */ 324 return ast_vhub_reply(ep, NULL, len); 325 } 326 327 static struct usb_gadget_strings* 328 ast_vhub_str_of_container(struct usb_gadget_string_container *container) 329 { 330 return (struct usb_gadget_strings *)container->stash; 331 } 332 333 static int ast_vhub_collect_languages(struct ast_vhub *vhub, void *buf, 334 size_t size) 335 { 336 int rc, hdr_len, nlangs, max_langs; 337 struct usb_gadget_strings *lang_str; 338 struct usb_gadget_string_container *container; 339 struct usb_string_descriptor *sdesc = buf; 340 341 nlangs = 0; 342 hdr_len = sizeof(struct usb_descriptor_header); 343 max_langs = (size - hdr_len) / sizeof(sdesc->wData[0]); 344 list_for_each_entry(container, &vhub->vhub_str_desc, list) { 345 if (nlangs >= max_langs) 346 break; 347 348 lang_str = ast_vhub_str_of_container(container); 349 sdesc->wData[nlangs++] = cpu_to_le16(lang_str->language); 350 } 351 352 rc = hdr_len + nlangs * sizeof(sdesc->wData[0]); 353 sdesc->bLength = rc; 354 sdesc->bDescriptorType = USB_DT_STRING; 355 356 return rc; 357 } 358 359 static struct usb_gadget_strings *ast_vhub_lookup_string(struct ast_vhub *vhub, 360 u16 lang_id) 361 { 362 struct usb_gadget_strings *lang_str; 363 struct usb_gadget_string_container *container; 364 365 list_for_each_entry(container, &vhub->vhub_str_desc, list) { 366 lang_str = ast_vhub_str_of_container(container); 367 if (lang_str->language == lang_id) 368 return lang_str; 369 } 370 371 return NULL; 372 } 373 374 static int ast_vhub_rep_string(struct ast_vhub_ep *ep, 375 u8 string_id, u16 lang_id, 376 u16 len) 377 { 378 int rc; 379 u8 buf[256]; 380 struct ast_vhub *vhub = ep->vhub; 381 struct usb_gadget_strings *lang_str; 382 383 if (string_id == 0) { 384 rc = ast_vhub_collect_languages(vhub, buf, sizeof(buf)); 385 } else { 386 lang_str = ast_vhub_lookup_string(vhub, lang_id); 387 if (!lang_str) 388 return std_req_stall; 389 390 rc = usb_gadget_get_string(lang_str, string_id, buf); 391 } 392 393 if (rc < 0 || rc >= AST_VHUB_EP0_MAX_PACKET) 394 return std_req_stall; 395 396 /* Shoot it from the EP buffer */ 397 memcpy(ep->buf, buf, rc); 398 return ast_vhub_reply(ep, NULL, min_t(u16, rc, len)); 399 } 400 401 enum std_req_rc ast_vhub_std_hub_request(struct ast_vhub_ep *ep, 402 struct usb_ctrlrequest *crq) 403 { 404 struct ast_vhub *vhub = ep->vhub; 405 u16 wValue, wIndex, wLength; 406 407 wValue = le16_to_cpu(crq->wValue); 408 wIndex = le16_to_cpu(crq->wIndex); 409 wLength = le16_to_cpu(crq->wLength); 410 411 /* First packet, grab speed */ 412 if (vhub->speed == USB_SPEED_UNKNOWN) { 413 u32 ustat = readl(vhub->regs + AST_VHUB_USBSTS); 414 if (ustat & VHUB_USBSTS_HISPEED) 415 vhub->speed = USB_SPEED_HIGH; 416 else 417 vhub->speed = USB_SPEED_FULL; 418 UDCDBG(vhub, "USB status=%08x speed=%s\n", ustat, 419 vhub->speed == USB_SPEED_HIGH ? "high" : "full"); 420 } 421 422 switch ((crq->bRequestType << 8) | crq->bRequest) { 423 /* SET_ADDRESS */ 424 case DeviceOutRequest | USB_REQ_SET_ADDRESS: 425 EPDBG(ep, "SET_ADDRESS: Got address %x\n", wValue); 426 writel(wValue, vhub->regs + AST_VHUB_CONF); 427 return std_req_complete; 428 429 /* GET_STATUS */ 430 case DeviceRequest | USB_REQ_GET_STATUS: 431 return ast_vhub_hub_dev_status(ep, wIndex, wValue); 432 case InterfaceRequest | USB_REQ_GET_STATUS: 433 return ast_vhub_simple_reply(ep, 0, 0); 434 case EndpointRequest | USB_REQ_GET_STATUS: 435 return ast_vhub_hub_ep_status(ep, wIndex, wValue); 436 437 /* SET/CLEAR_FEATURE */ 438 case DeviceOutRequest | USB_REQ_SET_FEATURE: 439 return ast_vhub_hub_dev_feature(ep, wIndex, wValue, true); 440 case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: 441 return ast_vhub_hub_dev_feature(ep, wIndex, wValue, false); 442 case EndpointOutRequest | USB_REQ_SET_FEATURE: 443 return ast_vhub_hub_ep_feature(ep, wIndex, wValue, true); 444 case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: 445 return ast_vhub_hub_ep_feature(ep, wIndex, wValue, false); 446 447 /* GET/SET_CONFIGURATION */ 448 case DeviceRequest | USB_REQ_GET_CONFIGURATION: 449 return ast_vhub_simple_reply(ep, 1); 450 case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: 451 if (wValue != 1) 452 return std_req_stall; 453 return std_req_complete; 454 455 /* GET_DESCRIPTOR */ 456 case DeviceRequest | USB_REQ_GET_DESCRIPTOR: 457 switch (wValue >> 8) { 458 case USB_DT_DEVICE: 459 case USB_DT_CONFIG: 460 case USB_DT_DEVICE_QUALIFIER: 461 case USB_DT_OTHER_SPEED_CONFIG: 462 return ast_vhub_rep_desc(ep, wValue >> 8, 463 wLength); 464 case USB_DT_STRING: 465 return ast_vhub_rep_string(ep, wValue & 0xff, 466 wIndex, wLength); 467 } 468 return std_req_stall; 469 470 /* GET/SET_INTERFACE */ 471 case DeviceRequest | USB_REQ_GET_INTERFACE: 472 return ast_vhub_simple_reply(ep, 0); 473 case DeviceOutRequest | USB_REQ_SET_INTERFACE: 474 if (wValue != 0 || wIndex != 0) 475 return std_req_stall; 476 return std_req_complete; 477 } 478 return std_req_stall; 479 } 480 481 static void ast_vhub_update_hub_ep1(struct ast_vhub *vhub, 482 unsigned int port) 483 { 484 /* Update HW EP1 response */ 485 u32 reg = readl(vhub->regs + AST_VHUB_EP1_STS_CHG); 486 u32 pmask = (1 << (port + 1)); 487 if (vhub->ports[port].change) 488 reg |= pmask; 489 else 490 reg &= ~pmask; 491 writel(reg, vhub->regs + AST_VHUB_EP1_STS_CHG); 492 } 493 494 static void ast_vhub_change_port_stat(struct ast_vhub *vhub, 495 unsigned int port, 496 u16 clr_flags, 497 u16 set_flags, 498 bool set_c) 499 { 500 struct ast_vhub_port *p = &vhub->ports[port]; 501 u16 prev; 502 503 /* Update port status */ 504 prev = p->status; 505 p->status = (prev & ~clr_flags) | set_flags; 506 DDBG(&p->dev, "port %d status %04x -> %04x (C=%d)\n", 507 port + 1, prev, p->status, set_c); 508 509 /* Update change bits if needed */ 510 if (set_c) { 511 u16 chg = p->status ^ prev; 512 513 /* Only these are relevant for change */ 514 chg &= USB_PORT_STAT_C_CONNECTION | 515 USB_PORT_STAT_C_ENABLE | 516 USB_PORT_STAT_C_SUSPEND | 517 USB_PORT_STAT_C_OVERCURRENT | 518 USB_PORT_STAT_C_RESET | 519 USB_PORT_STAT_C_L1; 520 521 /* 522 * We only set USB_PORT_STAT_C_ENABLE if we are disabling 523 * the port as per USB spec, otherwise MacOS gets upset 524 */ 525 if (p->status & USB_PORT_STAT_ENABLE) 526 chg &= ~USB_PORT_STAT_C_ENABLE; 527 528 p->change = chg; 529 ast_vhub_update_hub_ep1(vhub, port); 530 } 531 } 532 533 static void ast_vhub_send_host_wakeup(struct ast_vhub *vhub) 534 { 535 u32 reg = readl(vhub->regs + AST_VHUB_CTRL); 536 UDCDBG(vhub, "Waking up host !\n"); 537 reg |= VHUB_CTRL_MANUAL_REMOTE_WAKEUP; 538 writel(reg, vhub->regs + AST_VHUB_CTRL); 539 } 540 541 void ast_vhub_device_connect(struct ast_vhub *vhub, 542 unsigned int port, bool on) 543 { 544 if (on) 545 ast_vhub_change_port_stat(vhub, port, 0, 546 USB_PORT_STAT_CONNECTION, true); 547 else 548 ast_vhub_change_port_stat(vhub, port, 549 USB_PORT_STAT_CONNECTION | 550 USB_PORT_STAT_ENABLE, 551 0, true); 552 553 /* 554 * If the hub is set to wakup the host on connection events 555 * then send a wakeup. 556 */ 557 if (vhub->wakeup_en) 558 ast_vhub_send_host_wakeup(vhub); 559 } 560 561 static void ast_vhub_wake_work(struct work_struct *work) 562 { 563 struct ast_vhub *vhub = container_of(work, 564 struct ast_vhub, 565 wake_work); 566 unsigned long flags; 567 unsigned int i; 568 569 /* 570 * Wake all sleeping ports. If a port is suspended by 571 * the host suspend (without explicit state suspend), 572 * we let the normal host wake path deal with it later. 573 */ 574 spin_lock_irqsave(&vhub->lock, flags); 575 for (i = 0; i < vhub->max_ports; i++) { 576 struct ast_vhub_port *p = &vhub->ports[i]; 577 578 if (!(p->status & USB_PORT_STAT_SUSPEND)) 579 continue; 580 ast_vhub_change_port_stat(vhub, i, 581 USB_PORT_STAT_SUSPEND, 582 0, true); 583 ast_vhub_dev_resume(&p->dev); 584 } 585 ast_vhub_send_host_wakeup(vhub); 586 spin_unlock_irqrestore(&vhub->lock, flags); 587 } 588 589 void ast_vhub_hub_wake_all(struct ast_vhub *vhub) 590 { 591 /* 592 * A device is trying to wake the world, because this 593 * can recurse into the device, we break the call chain 594 * using a work queue 595 */ 596 schedule_work(&vhub->wake_work); 597 } 598 599 static void ast_vhub_port_reset(struct ast_vhub *vhub, u8 port) 600 { 601 struct ast_vhub_port *p = &vhub->ports[port]; 602 u16 set, clr, speed; 603 604 /* First mark disabled */ 605 ast_vhub_change_port_stat(vhub, port, 606 USB_PORT_STAT_ENABLE | 607 USB_PORT_STAT_SUSPEND, 608 USB_PORT_STAT_RESET, 609 false); 610 611 if (!p->dev.driver) 612 return; 613 614 /* 615 * This will either "start" the port or reset the 616 * device if already started... 617 */ 618 ast_vhub_dev_reset(&p->dev); 619 620 /* Grab the right speed */ 621 speed = p->dev.driver->max_speed; 622 if (speed == USB_SPEED_UNKNOWN || speed > vhub->speed) 623 speed = vhub->speed; 624 625 switch (speed) { 626 case USB_SPEED_LOW: 627 set = USB_PORT_STAT_LOW_SPEED; 628 clr = USB_PORT_STAT_HIGH_SPEED; 629 break; 630 case USB_SPEED_FULL: 631 set = 0; 632 clr = USB_PORT_STAT_LOW_SPEED | 633 USB_PORT_STAT_HIGH_SPEED; 634 break; 635 case USB_SPEED_HIGH: 636 set = USB_PORT_STAT_HIGH_SPEED; 637 clr = USB_PORT_STAT_LOW_SPEED; 638 break; 639 default: 640 UDCDBG(vhub, "Unsupported speed %d when" 641 " connecting device\n", 642 speed); 643 return; 644 } 645 clr |= USB_PORT_STAT_RESET; 646 set |= USB_PORT_STAT_ENABLE; 647 648 /* This should ideally be delayed ... */ 649 ast_vhub_change_port_stat(vhub, port, clr, set, true); 650 } 651 652 static enum std_req_rc ast_vhub_set_port_feature(struct ast_vhub_ep *ep, 653 u8 port, u16 feat) 654 { 655 struct ast_vhub *vhub = ep->vhub; 656 struct ast_vhub_port *p; 657 658 if (port == 0 || port > vhub->max_ports) 659 return std_req_stall; 660 port--; 661 p = &vhub->ports[port]; 662 663 switch(feat) { 664 case USB_PORT_FEAT_SUSPEND: 665 if (!(p->status & USB_PORT_STAT_ENABLE)) 666 return std_req_complete; 667 ast_vhub_change_port_stat(vhub, port, 668 0, USB_PORT_STAT_SUSPEND, 669 false); 670 ast_vhub_dev_suspend(&p->dev); 671 return std_req_complete; 672 case USB_PORT_FEAT_RESET: 673 EPDBG(ep, "Port reset !\n"); 674 ast_vhub_port_reset(vhub, port); 675 return std_req_complete; 676 case USB_PORT_FEAT_POWER: 677 /* 678 * On Power-on, we mark the connected flag changed, 679 * if there's a connected device, some hosts will 680 * otherwise fail to detect it. 681 */ 682 if (p->status & USB_PORT_STAT_CONNECTION) { 683 p->change |= USB_PORT_STAT_C_CONNECTION; 684 ast_vhub_update_hub_ep1(vhub, port); 685 } 686 return std_req_complete; 687 case USB_PORT_FEAT_TEST: 688 case USB_PORT_FEAT_INDICATOR: 689 /* We don't do anything with these */ 690 return std_req_complete; 691 } 692 return std_req_stall; 693 } 694 695 static enum std_req_rc ast_vhub_clr_port_feature(struct ast_vhub_ep *ep, 696 u8 port, u16 feat) 697 { 698 struct ast_vhub *vhub = ep->vhub; 699 struct ast_vhub_port *p; 700 701 if (port == 0 || port > vhub->max_ports) 702 return std_req_stall; 703 port--; 704 p = &vhub->ports[port]; 705 706 switch(feat) { 707 case USB_PORT_FEAT_ENABLE: 708 ast_vhub_change_port_stat(vhub, port, 709 USB_PORT_STAT_ENABLE | 710 USB_PORT_STAT_SUSPEND, 0, 711 false); 712 ast_vhub_dev_suspend(&p->dev); 713 return std_req_complete; 714 case USB_PORT_FEAT_SUSPEND: 715 if (!(p->status & USB_PORT_STAT_SUSPEND)) 716 return std_req_complete; 717 ast_vhub_change_port_stat(vhub, port, 718 USB_PORT_STAT_SUSPEND, 0, 719 false); 720 ast_vhub_dev_resume(&p->dev); 721 return std_req_complete; 722 case USB_PORT_FEAT_POWER: 723 /* We don't do power control */ 724 return std_req_complete; 725 case USB_PORT_FEAT_INDICATOR: 726 /* We don't have indicators */ 727 return std_req_complete; 728 case USB_PORT_FEAT_C_CONNECTION: 729 case USB_PORT_FEAT_C_ENABLE: 730 case USB_PORT_FEAT_C_SUSPEND: 731 case USB_PORT_FEAT_C_OVER_CURRENT: 732 case USB_PORT_FEAT_C_RESET: 733 /* Clear state-change feature */ 734 p->change &= ~(1u << (feat - 16)); 735 ast_vhub_update_hub_ep1(vhub, port); 736 return std_req_complete; 737 } 738 return std_req_stall; 739 } 740 741 static enum std_req_rc ast_vhub_get_port_stat(struct ast_vhub_ep *ep, 742 u8 port) 743 { 744 struct ast_vhub *vhub = ep->vhub; 745 u16 stat, chg; 746 747 if (port == 0 || port > vhub->max_ports) 748 return std_req_stall; 749 port--; 750 751 stat = vhub->ports[port].status; 752 chg = vhub->ports[port].change; 753 754 /* We always have power */ 755 stat |= USB_PORT_STAT_POWER; 756 757 EPDBG(ep, " port status=%04x change=%04x\n", stat, chg); 758 759 return ast_vhub_simple_reply(ep, 760 stat & 0xff, 761 stat >> 8, 762 chg & 0xff, 763 chg >> 8); 764 } 765 766 enum std_req_rc ast_vhub_class_hub_request(struct ast_vhub_ep *ep, 767 struct usb_ctrlrequest *crq) 768 { 769 u16 wValue, wIndex, wLength; 770 771 wValue = le16_to_cpu(crq->wValue); 772 wIndex = le16_to_cpu(crq->wIndex); 773 wLength = le16_to_cpu(crq->wLength); 774 775 switch ((crq->bRequestType << 8) | crq->bRequest) { 776 case GetHubStatus: 777 EPDBG(ep, "GetHubStatus\n"); 778 return ast_vhub_simple_reply(ep, 0, 0, 0, 0); 779 case GetPortStatus: 780 EPDBG(ep, "GetPortStatus(%d)\n", wIndex & 0xff); 781 return ast_vhub_get_port_stat(ep, wIndex & 0xf); 782 case GetHubDescriptor: 783 if (wValue != (USB_DT_HUB << 8)) 784 return std_req_stall; 785 EPDBG(ep, "GetHubDescriptor(%d)\n", wIndex & 0xff); 786 return ast_vhub_rep_desc(ep, USB_DT_HUB, wLength); 787 case SetHubFeature: 788 case ClearHubFeature: 789 EPDBG(ep, "Get/SetHubFeature(%d)\n", wValue); 790 /* No feature, just complete the requests */ 791 if (wValue == C_HUB_LOCAL_POWER || 792 wValue == C_HUB_OVER_CURRENT) 793 return std_req_complete; 794 return std_req_stall; 795 case SetPortFeature: 796 EPDBG(ep, "SetPortFeature(%d,%d)\n", wIndex & 0xf, wValue); 797 return ast_vhub_set_port_feature(ep, wIndex & 0xf, wValue); 798 case ClearPortFeature: 799 EPDBG(ep, "ClearPortFeature(%d,%d)\n", wIndex & 0xf, wValue); 800 return ast_vhub_clr_port_feature(ep, wIndex & 0xf, wValue); 801 case ClearTTBuffer: 802 case ResetTT: 803 case StopTT: 804 return std_req_complete; 805 case GetTTState: 806 return ast_vhub_simple_reply(ep, 0, 0, 0, 0); 807 default: 808 EPDBG(ep, "Unknown class request\n"); 809 } 810 return std_req_stall; 811 } 812 813 void ast_vhub_hub_suspend(struct ast_vhub *vhub) 814 { 815 unsigned int i; 816 817 UDCDBG(vhub, "USB bus suspend\n"); 818 819 if (vhub->suspended) 820 return; 821 822 vhub->suspended = true; 823 824 /* 825 * Forward to unsuspended ports without changing 826 * their connection status. 827 */ 828 for (i = 0; i < vhub->max_ports; i++) { 829 struct ast_vhub_port *p = &vhub->ports[i]; 830 831 if (!(p->status & USB_PORT_STAT_SUSPEND)) 832 ast_vhub_dev_suspend(&p->dev); 833 } 834 } 835 836 void ast_vhub_hub_resume(struct ast_vhub *vhub) 837 { 838 unsigned int i; 839 840 UDCDBG(vhub, "USB bus resume\n"); 841 842 if (!vhub->suspended) 843 return; 844 845 vhub->suspended = false; 846 847 /* 848 * Forward to unsuspended ports without changing 849 * their connection status. 850 */ 851 for (i = 0; i < vhub->max_ports; i++) { 852 struct ast_vhub_port *p = &vhub->ports[i]; 853 854 if (!(p->status & USB_PORT_STAT_SUSPEND)) 855 ast_vhub_dev_resume(&p->dev); 856 } 857 } 858 859 void ast_vhub_hub_reset(struct ast_vhub *vhub) 860 { 861 unsigned int i; 862 863 UDCDBG(vhub, "USB bus reset\n"); 864 865 /* 866 * Is the speed known ? If not we don't care, we aren't 867 * initialized yet and ports haven't been enabled. 868 */ 869 if (vhub->speed == USB_SPEED_UNKNOWN) 870 return; 871 872 /* We aren't suspended anymore obviously */ 873 vhub->suspended = false; 874 875 /* No speed set */ 876 vhub->speed = USB_SPEED_UNKNOWN; 877 878 /* Wakeup not enabled anymore */ 879 vhub->wakeup_en = false; 880 881 /* 882 * Clear all port status, disable gadgets and "suspend" 883 * them. They will be woken up by a port reset. 884 */ 885 for (i = 0; i < vhub->max_ports; i++) { 886 struct ast_vhub_port *p = &vhub->ports[i]; 887 888 /* Only keep the connected flag */ 889 p->status &= USB_PORT_STAT_CONNECTION; 890 p->change = 0; 891 892 /* Suspend the gadget if any */ 893 ast_vhub_dev_suspend(&p->dev); 894 } 895 896 /* Cleanup HW */ 897 writel(0, vhub->regs + AST_VHUB_CONF); 898 writel(0, vhub->regs + AST_VHUB_EP0_CTRL); 899 writel(VHUB_EP1_CTRL_RESET_TOGGLE | 900 VHUB_EP1_CTRL_ENABLE, 901 vhub->regs + AST_VHUB_EP1_CTRL); 902 writel(0, vhub->regs + AST_VHUB_EP1_STS_CHG); 903 } 904 905 static void ast_vhub_of_parse_dev_desc(struct ast_vhub *vhub, 906 const struct device_node *vhub_np) 907 { 908 u16 id; 909 u32 data; 910 911 if (!of_property_read_u32(vhub_np, "vhub-vendor-id", &data)) { 912 id = (u16)data; 913 vhub->vhub_dev_desc.idVendor = cpu_to_le16(id); 914 } 915 if (!of_property_read_u32(vhub_np, "vhub-product-id", &data)) { 916 id = (u16)data; 917 vhub->vhub_dev_desc.idProduct = cpu_to_le16(id); 918 } 919 if (!of_property_read_u32(vhub_np, "vhub-device-revision", &data)) { 920 id = (u16)data; 921 vhub->vhub_dev_desc.bcdDevice = cpu_to_le16(id); 922 } 923 } 924 925 static void ast_vhub_fixup_usb1_dev_desc(struct ast_vhub *vhub) 926 { 927 vhub->vhub_dev_desc.bcdUSB = cpu_to_le16(0x0100); 928 vhub->vhub_dev_desc.bDeviceProtocol = 0; 929 } 930 931 static struct usb_gadget_string_container* 932 ast_vhub_str_container_alloc(struct ast_vhub *vhub) 933 { 934 unsigned int size; 935 struct usb_string *str_array; 936 struct usb_gadget_strings *lang_str; 937 struct usb_gadget_string_container *container; 938 939 size = sizeof(*container); 940 size += sizeof(struct usb_gadget_strings); 941 size += sizeof(struct usb_string) * AST_VHUB_STR_INDEX_MAX; 942 container = devm_kzalloc(&vhub->pdev->dev, size, GFP_KERNEL); 943 if (!container) 944 return ERR_PTR(-ENOMEM); 945 946 lang_str = ast_vhub_str_of_container(container); 947 str_array = (struct usb_string *)(lang_str + 1); 948 lang_str->strings = str_array; 949 return container; 950 } 951 952 static void ast_vhub_str_deep_copy(struct usb_gadget_strings *dest, 953 const struct usb_gadget_strings *src) 954 { 955 struct usb_string *src_array = src->strings; 956 struct usb_string *dest_array = dest->strings; 957 958 dest->language = src->language; 959 if (src_array && dest_array) { 960 do { 961 *dest_array = *src_array; 962 dest_array++; 963 src_array++; 964 } while (src_array->s); 965 } 966 } 967 968 static int ast_vhub_str_alloc_add(struct ast_vhub *vhub, 969 const struct usb_gadget_strings *src_str) 970 { 971 struct usb_gadget_strings *dest_str; 972 struct usb_gadget_string_container *container; 973 974 container = ast_vhub_str_container_alloc(vhub); 975 if (IS_ERR(container)) 976 return PTR_ERR(container); 977 978 dest_str = ast_vhub_str_of_container(container); 979 ast_vhub_str_deep_copy(dest_str, src_str); 980 list_add_tail(&container->list, &vhub->vhub_str_desc); 981 982 return 0; 983 } 984 985 static const struct { 986 const char *name; 987 u8 id; 988 } str_id_map[] = { 989 {"manufacturer", AST_VHUB_STR_MANUF}, 990 {"product", AST_VHUB_STR_PRODUCT}, 991 {"serial-number", AST_VHUB_STR_SERIAL}, 992 {}, 993 }; 994 995 static int ast_vhub_of_parse_str_desc(struct ast_vhub *vhub, 996 const struct device_node *desc_np) 997 { 998 u32 langid; 999 int ret = 0; 1000 int i, offset; 1001 const char *str; 1002 struct device_node *child; 1003 struct usb_string str_array[AST_VHUB_STR_INDEX_MAX]; 1004 struct usb_gadget_strings lang_str = { 1005 .strings = (struct usb_string *)str_array, 1006 }; 1007 1008 for_each_child_of_node(desc_np, child) { 1009 if (of_property_read_u32(child, "reg", &langid)) 1010 continue; /* no language identifier specified */ 1011 1012 if (!usb_validate_langid(langid)) 1013 continue; /* invalid language identifier */ 1014 1015 lang_str.language = langid; 1016 for (i = offset = 0; str_id_map[i].name; i++) { 1017 str = of_get_property(child, str_id_map[i].name, NULL); 1018 if (str) { 1019 str_array[offset].s = str; 1020 str_array[offset].id = str_id_map[i].id; 1021 offset++; 1022 } 1023 } 1024 str_array[offset].id = 0; 1025 str_array[offset].s = NULL; 1026 1027 ret = ast_vhub_str_alloc_add(vhub, &lang_str); 1028 if (ret) { 1029 of_node_put(child); 1030 break; 1031 } 1032 } 1033 1034 return ret; 1035 } 1036 1037 static int ast_vhub_init_desc(struct ast_vhub *vhub) 1038 { 1039 int ret; 1040 struct device_node *desc_np; 1041 const struct device_node *vhub_np = vhub->pdev->dev.of_node; 1042 1043 /* Initialize vhub Device Descriptor. */ 1044 memcpy(&vhub->vhub_dev_desc, &ast_vhub_dev_desc, 1045 sizeof(vhub->vhub_dev_desc)); 1046 ast_vhub_of_parse_dev_desc(vhub, vhub_np); 1047 if (vhub->force_usb1) 1048 ast_vhub_fixup_usb1_dev_desc(vhub); 1049 1050 /* Initialize vhub Configuration Descriptor. */ 1051 memcpy(&vhub->vhub_conf_desc, &ast_vhub_conf_desc, 1052 sizeof(vhub->vhub_conf_desc)); 1053 1054 /* Initialize vhub Hub Descriptor. */ 1055 memcpy(&vhub->vhub_hub_desc, &ast_vhub_hub_desc, 1056 sizeof(vhub->vhub_hub_desc)); 1057 vhub->vhub_hub_desc.bNbrPorts = vhub->max_ports; 1058 1059 /* Initialize vhub String Descriptors. */ 1060 INIT_LIST_HEAD(&vhub->vhub_str_desc); 1061 desc_np = of_get_child_by_name(vhub_np, "vhub-strings"); 1062 if (desc_np) 1063 ret = ast_vhub_of_parse_str_desc(vhub, desc_np); 1064 else 1065 ret = ast_vhub_str_alloc_add(vhub, &ast_vhub_strings); 1066 1067 /* Initialize vhub Qualifier Descriptor. */ 1068 memcpy(&vhub->vhub_qual_desc, &ast_vhub_qual_desc, 1069 sizeof(vhub->vhub_qual_desc)); 1070 1071 return ret; 1072 } 1073 1074 int ast_vhub_init_hub(struct ast_vhub *vhub) 1075 { 1076 vhub->speed = USB_SPEED_UNKNOWN; 1077 INIT_WORK(&vhub->wake_work, ast_vhub_wake_work); 1078 1079 return ast_vhub_init_desc(vhub); 1080 } 1081