hw/usb-hub.c

   1 /*
   2  * QEMU USB HUB emulation
   3  *
   4  * Copyright (c) 2005 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include "vl.h"
  25
  26 //#define DEBUG
  27
  28 #define MAX_PORTS 8
  29
  30 typedef struct USBHubPort {
  31     USBPort port;
  32     uint16_t wPortStatus;
  33     uint16_t wPortChange;
  34 } USBHubPort;
  35
  36 typedef struct USBHubState {
  37     USBDevice dev;
  38     int nb_ports;
  39     USBHubPort ports[MAX_PORTS];
  40 } USBHubState;
  41
  42 #define ClearHubFeature         (0x2000 | USB_REQ_CLEAR_FEATURE)
  43 #define ClearPortFeature        (0x2300 | USB_REQ_CLEAR_FEATURE)
  44 #define GetHubDescriptor        (0xa000 | USB_REQ_GET_DESCRIPTOR)
  45 #define GetHubStatus            (0xa000 | USB_REQ_GET_STATUS)
  46 #define GetPortStatus           (0xa300 | USB_REQ_GET_STATUS)
  47 #define SetHubFeature           (0x2000 | USB_REQ_SET_FEATURE)
  48 #define SetPortFeature          (0x2300 | USB_REQ_SET_FEATURE)
  49
  50 #define PORT_STAT_CONNECTION    0x0001
  51 #define PORT_STAT_ENABLE        0x0002
  52 #define PORT_STAT_SUSPEND       0x0004
  53 #define PORT_STAT_OVERCURRENT   0x0008
  54 #define PORT_STAT_RESET         0x0010
  55 #define PORT_STAT_POWER         0x0100
  56 #define PORT_STAT_LOW_SPEED     0x0200
  57 #define PORT_STAT_HIGH_SPEED    0x0400
  58 #define PORT_STAT_TEST          0x0800
  59 #define PORT_STAT_INDICATOR     0x1000
  60
  61 #define PORT_STAT_C_CONNECTION  0x0001
  62 #define PORT_STAT_C_ENABLE      0x0002
  63 #define PORT_STAT_C_SUSPEND     0x0004
  64 #define PORT_STAT_C_OVERCURRENT 0x0008
  65 #define PORT_STAT_C_RESET       0x0010
  66
  67 #define PORT_CONNECTION         0
  68 #define PORT_ENABLE             1
  69 #define PORT_SUSPEND            2
  70 #define PORT_OVERCURRENT        3
  71 #define PORT_RESET              4
  72 #define PORT_POWER              8
  73 #define PORT_LOWSPEED           9
  74 #define PORT_HIGHSPEED          10
  75 #define PORT_C_CONNECTION       16
  76 #define PORT_C_ENABLE           17
  77 #define PORT_C_SUSPEND          18
  78 #define PORT_C_OVERCURRENT      19
  79 #define PORT_C_RESET            20
  80 #define PORT_TEST               21
  81 #define PORT_INDICATOR          22
  82
  83 /* same as Linux kernel root hubs */
  84
  85 static const uint8_t qemu_hub_dev_descriptor[] = {
  86         0x12,       /*  u8 bLength; */
  87         0x01,       /*  u8 bDescriptorType; Device */
  88         0x10, 0x01, /*  u16 bcdUSB; v1.1 */
  89
  90         0x09,       /*  u8  bDeviceClass; HUB_CLASSCODE */
  91         0x00,       /*  u8  bDeviceSubClass; */
  92         0x00,       /*  u8  bDeviceProtocol; [ low/full speeds only ] */
  93         0x08,       /*  u8  bMaxPacketSize0; 8 Bytes */
  94
  95         0x00, 0x00, /*  u16 idVendor; */
  96         0x00, 0x00, /*  u16 idProduct; */
  97         0x01, 0x01, /*  u16 bcdDevice */
  98
  99         0x03,       /*  u8  iManufacturer; */
 100         0x02,       /*  u8  iProduct; */
 101         0x01,       /*  u8  iSerialNumber; */
 102         0x01        /*  u8  bNumConfigurations; */
 103 };
 104
 105 /* XXX: patch interrupt size */
 106 static const uint8_t qemu_hub_config_descriptor[] = {
 107
 108         /* one configuration */
 109         0x09,       /*  u8  bLength; */
 110         0x02,       /*  u8  bDescriptorType; Configuration */
 111         0x19, 0x00, /*  u16 wTotalLength; */
 112         0x01,       /*  u8  bNumInterfaces; (1) */
 113         0x01,       /*  u8  bConfigurationValue; */
 114         0x00,       /*  u8  iConfiguration; */
 115         0xc0,       /*  u8  bmAttributes;
 116                                  Bit 7: must be set,
 117                                      6: Self-powered,
 118                                      5: Remote wakeup,
 119                                      4..0: resvd */
 120         0x00,       /*  u8  MaxPower; */
 121
 122         /* USB 1.1:
 123          * USB 2.0, single TT organization (mandatory):
 124          *      one interface, protocol 0
 125          *
 126          * USB 2.0, multiple TT organization (optional):
 127          *      two interfaces, protocols 1 (like single TT)
 128          *      and 2 (multiple TT mode) ... config is
 129          *      sometimes settable
 130          *      NOT IMPLEMENTED
 131          */
 132
 133         /* one interface */
 134         0x09,       /*  u8  if_bLength; */
 135         0x04,       /*  u8  if_bDescriptorType; Interface */
 136         0x00,       /*  u8  if_bInterfaceNumber; */
 137         0x00,       /*  u8  if_bAlternateSetting; */
 138         0x01,       /*  u8  if_bNumEndpoints; */
 139         0x09,       /*  u8  if_bInterfaceClass; HUB_CLASSCODE */
 140         0x00,       /*  u8  if_bInterfaceSubClass; */
 141         0x00,       /*  u8  if_bInterfaceProtocol; [usb1.1 or single tt] */
 142         0x00,       /*  u8  if_iInterface; */
 143
 144         /* one endpoint (status change endpoint) */
 145         0x07,       /*  u8  ep_bLength; */
 146         0x05,       /*  u8  ep_bDescriptorType; Endpoint */
 147         0x81,       /*  u8  ep_bEndpointAddress; IN Endpoint 1 */
 148         0x03,       /*  u8  ep_bmAttributes; Interrupt */
 149         0x02, 0x00, /*  u16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */
 150         0xff        /*  u8  ep_bInterval; (255ms -- usb 2.0 spec) */
 151 };
 152
 153 static const uint8_t qemu_hub_hub_descriptor[] =
 154 {
 155         0x00,                   /*  u8  bLength; patched in later */
 156         0x29,                   /*  u8  bDescriptorType; Hub-descriptor */
 157         0x00,                   /*  u8  bNbrPorts; (patched later) */
 158         0x0a,                   /* u16  wHubCharacteristics; */
 159         0x00,                   /*   (per-port OC, no power switching) */
 160         0x01,                   /*  u8  bPwrOn2pwrGood; 2ms */
 161         0x00                    /*  u8  bHubContrCurrent; 0 mA */
 162
 163         /* DeviceRemovable and PortPwrCtrlMask patched in later */
 164 };
 165
 166 static void usb_hub_attach(USBPort *port1, USBDevice *dev)
 167 {
 168     USBHubState *s = port1->opaque;
 169     USBHubPort *port = &s->ports[port1->index];
 170
 171     if (dev) {
 172         if (port->port.dev)
 173             usb_attach(port1, NULL);
 174
 175         port->wPortStatus |= PORT_STAT_CONNECTION;
 176         port->wPortChange |= PORT_STAT_C_CONNECTION;
 177         if (dev->speed == USB_SPEED_LOW)
 178             port->wPortStatus |= PORT_STAT_LOW_SPEED;
 179         else
 180             port->wPortStatus &= ~PORT_STAT_LOW_SPEED;
 181         port->port.dev = dev;
 182         /* send the attach message */
 183         dev->handle_packet(dev,
 184                            USB_MSG_ATTACH, 0, 0, NULL, 0);
 185     } else {
 186         dev = port->port.dev;
 187         if (dev) {
 188             port->wPortStatus &= ~PORT_STAT_CONNECTION;
 189             port->wPortChange |= PORT_STAT_C_CONNECTION;
 190             if (port->wPortStatus & PORT_STAT_ENABLE) {
 191                 port->wPortStatus &= ~PORT_STAT_ENABLE;
 192                 port->wPortChange |= PORT_STAT_C_ENABLE;
 193             }
 194             /* send the detach message */
 195             dev->handle_packet(dev,
 196                                USB_MSG_DETACH, 0, 0, NULL, 0);
 197             port->port.dev = NULL;
 198         }
 199     }
 200 }
 201
 202 static void usb_hub_handle_reset(USBDevice *dev, int destroy)
 203 {
 204     /* XXX: do it */
 205     if (destroy)
 206         qemu_free(dev);
 207 }
 208
 209 static int usb_hub_handle_control(USBDevice *dev, int request, int value,
 210                                   int index, int length, uint8_t *data)
 211 {
 212     USBHubState *s = (USBHubState *)dev;
 213     int ret;
 214
 215     switch(request) {
 216     case DeviceRequest | USB_REQ_GET_STATUS:
 217         data[0] = (1 << USB_DEVICE_SELF_POWERED) |
 218             (dev->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP);
 219         data[1] = 0x00;
 220         ret = 2;
 221         break;
 222     case DeviceOutRequest | USB_REQ_CLEAR_FEATURE:
 223         if (value == USB_DEVICE_REMOTE_WAKEUP) {
 224             dev->remote_wakeup = 0;
 225         } else {
 226             goto fail;
 227         }
 228         ret = 0;
 229         break;
 230     case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
 231         if (value == 0 && index != 0x81) { /* clear ep halt */
 232             goto fail;
 233         }
 234         ret = 0;
 235         break;
 236     case DeviceOutRequest | USB_REQ_SET_FEATURE:
 237         if (value == USB_DEVICE_REMOTE_WAKEUP) {
 238             dev->remote_wakeup = 1;
 239         } else {
 240             goto fail;
 241         }
 242         ret = 0;
 243         break;
 244     case DeviceOutRequest | USB_REQ_SET_ADDRESS:
 245         dev->addr = value;
 246         ret = 0;
 247         break;
 248     case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
 249         switch(value >> 8) {
 250         case USB_DT_DEVICE:
 251             memcpy(data, qemu_hub_dev_descriptor,
 252                    sizeof(qemu_hub_dev_descriptor));
 253             ret = sizeof(qemu_hub_dev_descriptor);
 254             break;
 255         case USB_DT_CONFIG:
 256             memcpy(data, qemu_hub_config_descriptor,
 257                    sizeof(qemu_hub_config_descriptor));
 258
 259             /* status change endpoint size based on number
 260              * of ports */
 261             data[22] = (s->nb_ports + 1 + 7) / 8;
 262
 263             ret = sizeof(qemu_hub_config_descriptor);
 264             break;
 265         case USB_DT_STRING:
 266             switch(value & 0xff) {
 267             case 0:
 268                 /* language ids */
 269                 data[0] = 4;
 270                 data[1] = 3;
 271                 data[2] = 0x09;
 272                 data[3] = 0x04;
 273                 ret = 4;
 274                 break;
 275             case 1:
 276                 /* serial number */
 277                 ret = set_usb_string(data, "314159");
 278                 break;
 279             case 2:
 280                 /* product description */
 281                 ret = set_usb_string(data, "QEMU USB Hub");
 282                 break;
 283             case 3:
 284                 /* vendor description */
 285                 ret = set_usb_string(data, "QEMU " QEMU_VERSION);
 286                 break;
 287             default:
 288                 goto fail;
 289             }
 290             break;
 291         default:
 292             goto fail;
 293         }
 294         break;
 295     case DeviceRequest | USB_REQ_GET_CONFIGURATION:
 296         data[0] = 1;
 297         ret = 1;
 298         break;
 299     case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
 300         ret = 0;
 301         break;
 302     case DeviceRequest | USB_REQ_GET_INTERFACE:
 303         data[0] = 0;
 304         ret = 1;
 305         break;
 306     case DeviceOutRequest | USB_REQ_SET_INTERFACE:
 307         ret = 0;
 308         break;
 309         /* usb specific requests */
 310     case GetHubStatus:
 311         data[0] = 0;
 312         data[1] = 0;
 313         data[2] = 0;
 314         data[3] = 0;
 315         ret = 4;
 316         break;
 317     case GetPortStatus:
 318         {
 319             unsigned int n = index - 1;
 320             USBHubPort *port;
 321             if (n >= s->nb_ports)
 322                 goto fail;
 323             port = &s->ports[n];
 324             data[0] = port->wPortStatus;
 325             data[1] = port->wPortStatus >> 8;
 326             data[2] = port->wPortChange;
 327             data[3] = port->wPortChange >> 8;
 328             ret = 4;
 329         }
 330         break;
 331     case SetHubFeature:
 332     case ClearHubFeature:
 333         if (value == 0 || value == 1) {
 334         } else {
 335             goto fail;
 336         }
 337         ret = 0;
 338         break;
 339     case SetPortFeature:
 340         {
 341             unsigned int n = index - 1;
 342             USBHubPort *port;
 343             USBDevice *dev;
 344             if (n >= s->nb_ports)
 345                 goto fail;
 346             port = &s->ports[n];
 347             dev = port->port.dev;
 348             switch(value) {
 349             case PORT_SUSPEND:
 350                 port->wPortStatus |= PORT_STAT_SUSPEND;
 351                 break;
 352             case PORT_RESET:
 353                 if (dev) {
 354                     dev->handle_packet(dev,
 355                                        USB_MSG_RESET, 0, 0, NULL, 0);
 356                     port->wPortChange |= PORT_STAT_C_RESET;
 357                     /* set enable bit */
 358                     port->wPortStatus |= PORT_STAT_ENABLE;
 359                 }
 360                 break;
 361             case PORT_POWER:
 362                 break;
 363             default:
 364                 goto fail;
 365             }
 366             ret = 0;
 367         }
 368         break;
 369     case ClearPortFeature:
 370         {
 371             unsigned int n = index - 1;
 372             USBHubPort *port;
 373             USBDevice *dev;
 374             if (n >= s->nb_ports)
 375                 goto fail;
 376             port = &s->ports[n];
 377             dev = port->port.dev;
 378             switch(value) {
 379             case PORT_ENABLE:
 380                 port->wPortStatus &= ~PORT_STAT_ENABLE;
 381                 break;
 382             case PORT_C_ENABLE:
 383                 port->wPortChange &= ~PORT_STAT_C_ENABLE;
 384                 break;
 385             case PORT_SUSPEND:
 386                 port->wPortStatus &= ~PORT_STAT_SUSPEND;
 387                 break;
 388             case PORT_C_SUSPEND:
 389                 port->wPortChange &= ~PORT_STAT_C_SUSPEND;
 390                 break;
 391             case PORT_C_CONNECTION:
 392                 port->wPortChange &= ~PORT_STAT_C_CONNECTION;
 393                 break;
 394             case PORT_C_OVERCURRENT:
 395                 port->wPortChange &= ~PORT_STAT_C_OVERCURRENT;
 396                 break;
 397             case PORT_C_RESET:
 398                 port->wPortChange &= ~PORT_STAT_C_RESET;
 399                 break;
 400             default:
 401                 goto fail;
 402             }
 403             ret = 0;
 404         }
 405         break;
 406     case GetHubDescriptor:
 407         {
 408             unsigned int n, limit, var_hub_size = 0;
 409             memcpy(data, qemu_hub_hub_descriptor,
 410                    sizeof(qemu_hub_hub_descriptor));
 411             data[2] = s->nb_ports;
 412
 413             /* fill DeviceRemovable bits */
 414             limit = ((s->nb_ports + 1 + 7) / 8) + 7;
 415             for (n = 7; n < limit; n++) {
 416                 data[n] = 0x00;
 417                 var_hub_size++;
 418             }
 419
 420             /* fill PortPwrCtrlMask bits */
 421             limit = limit + ((s->nb_ports + 7) / 8);
 422             for (;n < limit; n++) {
 423                 data[n] = 0xff;
 424                 var_hub_size++;
 425             }
 426
 427             ret = sizeof(qemu_hub_hub_descriptor) + var_hub_size;
 428             data[0] = ret;
 429             break;
 430         }
 431     default:
 432     fail:
 433         ret = USB_RET_STALL;
 434         break;
 435     }
 436     return ret;
 437 }
 438
 439 static int usb_hub_handle_data(USBDevice *dev, int pid,
 440                                uint8_t devep, uint8_t *data, int len)
 441 {
 442     USBHubState *s = (USBHubState *)dev;
 443     int ret;
 444
 445     switch(pid) {
 446     case USB_TOKEN_IN:
 447         if (devep == 1) {
 448             USBHubPort *port;
 449             unsigned int status;
 450             int i, n;
 451             n = (s->nb_ports + 1 + 7) / 8;
 452             if (len == 1) { /* FreeBSD workaround */
 453                 n = 1;
 454             } else if (n > len) {
 455                 return USB_RET_BABBLE;
 456             }
 457             status = 0;
 458             for(i = 0; i < s->nb_ports; i++) {
 459                 port = &s->ports[i];
 460                 if (port->wPortChange)
 461                     status |= (1 << (i + 1));
 462             }
 463             if (status != 0) {
 464                 for(i = 0; i < n; i++) {
 465                     data[i] = status >> (8 * i);
 466                 }
 467                 ret = n;
 468             } else {
 469                 ret = USB_RET_NAK; /* usb11 11.13.1 */
 470             }
 471         } else {
 472             goto fail;
 473         }
 474         break;
 475     case USB_TOKEN_OUT:
 476     default:
 477     fail:
 478         ret = USB_RET_STALL;
 479         break;
 480     }
 481     return ret;
 482 }
 483
 484 static int usb_hub_broadcast_packet(USBHubState *s, int pid,
 485                                     uint8_t devaddr, uint8_t devep,
 486                                     uint8_t *data, int len)
 487 {
 488     USBHubPort *port;
 489     USBDevice *dev;
 490     int i, ret;
 491
 492     for(i = 0; i < s->nb_ports; i++) {
 493         port = &s->ports[i];
 494         dev = port->port.dev;
 495         if (dev && (port->wPortStatus & PORT_STAT_ENABLE)) {
 496             ret = dev->handle_packet(dev, pid,
 497                                      devaddr, devep,
 498                                      data, len);
 499             if (ret != USB_RET_NODEV) {
 500                 return ret;
 501             }
 502         }
 503     }
 504     return USB_RET_NODEV;
 505 }
 506
 507 static int usb_hub_handle_packet(USBDevice *dev, int pid,
 508                                  uint8_t devaddr, uint8_t devep,
 509                                  uint8_t *data, int len)
 510 {
 511     USBHubState *s = (USBHubState *)dev;
 512
 513 #if defined(DEBUG) && 0
 514     printf("usb_hub: pid=0x%x\n", pid);
 515 #endif
 516     if (dev->state == USB_STATE_DEFAULT &&
 517         dev->addr != 0 &&
 518         devaddr != dev->addr &&
 519         (pid == USB_TOKEN_SETUP ||
 520          pid == USB_TOKEN_OUT ||
 521          pid == USB_TOKEN_IN)) {
 522         /* broadcast the packet to the devices */
 523         return usb_hub_broadcast_packet(s, pid, devaddr, devep, data, len);
 524     }
 525     return usb_generic_handle_packet(dev, pid, devaddr, devep, data, len);
 526 }
 527
 528 USBDevice *usb_hub_init(int nb_ports)
 529 {
 530     USBHubState *s;
 531     USBHubPort *port;
 532     int i;
 533
 534     if (nb_ports > MAX_PORTS)
 535         return NULL;
 536     s = qemu_mallocz(sizeof(USBHubState));
 537     if (!s)
 538         return NULL;
 539     s->dev.speed = USB_SPEED_FULL;
 540     s->dev.handle_packet = usb_hub_handle_packet;
 541
 542     /* generic USB device init */
 543     s->dev.handle_reset = usb_hub_handle_reset;
 544     s->dev.handle_control = usb_hub_handle_control;
 545     s->dev.handle_data = usb_hub_handle_data;
 546
 547     s->nb_ports = nb_ports;
 548     for(i = 0; i < s->nb_ports; i++) {
 549         port = &s->ports[i];
 550         qemu_register_usb_port(&port->port, s, i, usb_hub_attach);
 551         port->wPortStatus = PORT_STAT_POWER;
 552         port->wPortChange = 0;
 553     }
 554     return (USBDevice *)s;
 555 }