usb_hub.c 17 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654
  1. /*
  2. * Most of this source has been derived from the Linux USB
  3. * project:
  4. * (C) Copyright Linus Torvalds 1999
  5. * (C) Copyright Johannes Erdfelt 1999-2001
  6. * (C) Copyright Andreas Gal 1999
  7. * (C) Copyright Gregory P. Smith 1999
  8. * (C) Copyright Deti Fliegl 1999 (new USB architecture)
  9. * (C) Copyright Randy Dunlap 2000
  10. * (C) Copyright David Brownell 2000 (kernel hotplug, usb_device_id)
  11. * (C) Copyright Yggdrasil Computing, Inc. 2000
  12. * (usb_device_id matching changes by Adam J. Richter)
  13. *
  14. * Adapted for U-Boot:
  15. * (C) Copyright 2001 Denis Peter, MPL AG Switzerland
  16. *
  17. * SPDX-License-Identifier: GPL-2.0+
  18. */
  19. /****************************************************************************
  20. * HUB "Driver"
  21. * Probes device for being a hub and configurate it
  22. */
  23. #include <common.h>
  24. #include <command.h>
  25. #include <dm.h>
  26. #include <errno.h>
  27. #include <asm/processor.h>
  28. #include <asm/unaligned.h>
  29. #include <linux/ctype.h>
  30. #include <asm/byteorder.h>
  31. #include <asm/unaligned.h>
  32. #include <dm/root.h>
  33. DECLARE_GLOBAL_DATA_PTR;
  34. #include <usb.h>
  35. #ifdef CONFIG_4xx
  36. #include <asm/4xx_pci.h>
  37. #endif
  38. #define USB_BUFSIZ 512
  39. /* TODO(sjg@chromium.org): Remove this when CONFIG_DM_USB is defined */
  40. static struct usb_hub_device hub_dev[USB_MAX_HUB];
  41. static int usb_hub_index;
  42. __weak void usb_hub_reset_devices(int port)
  43. {
  44. return;
  45. }
  46. static int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
  47. {
  48. return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
  49. USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
  50. USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
  51. }
  52. static int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
  53. {
  54. return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
  55. USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature,
  56. port, NULL, 0, USB_CNTL_TIMEOUT);
  57. }
  58. static int usb_set_port_feature(struct usb_device *dev, int port, int feature)
  59. {
  60. return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
  61. USB_REQ_SET_FEATURE, USB_RT_PORT, feature,
  62. port, NULL, 0, USB_CNTL_TIMEOUT);
  63. }
  64. static int usb_get_hub_status(struct usb_device *dev, void *data)
  65. {
  66. return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
  67. USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
  68. data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
  69. }
  70. static int usb_get_port_status(struct usb_device *dev, int port, void *data)
  71. {
  72. return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
  73. USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
  74. data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
  75. }
  76. static void usb_hub_power_on(struct usb_hub_device *hub)
  77. {
  78. int i;
  79. struct usb_device *dev;
  80. unsigned pgood_delay = hub->desc.bPwrOn2PwrGood * 2;
  81. const char *env;
  82. dev = hub->pusb_dev;
  83. debug("enabling power on all ports\n");
  84. for (i = 0; i < dev->maxchild; i++) {
  85. usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
  86. debug("port %d returns %lX\n", i + 1, dev->status);
  87. }
  88. /*
  89. * Wait for power to become stable,
  90. * plus spec-defined max time for device to connect
  91. * but allow this time to be increased via env variable as some
  92. * devices break the spec and require longer warm-up times
  93. */
  94. env = getenv("usb_pgood_delay");
  95. if (env)
  96. pgood_delay = max(pgood_delay,
  97. (unsigned)simple_strtol(env, NULL, 0));
  98. debug("pgood_delay=%dms\n", pgood_delay);
  99. mdelay(pgood_delay + 1000);
  100. }
  101. void usb_hub_reset(void)
  102. {
  103. usb_hub_index = 0;
  104. }
  105. static struct usb_hub_device *usb_hub_allocate(void)
  106. {
  107. if (usb_hub_index < USB_MAX_HUB)
  108. return &hub_dev[usb_hub_index++];
  109. printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB);
  110. return NULL;
  111. }
  112. #define MAX_TRIES 5
  113. static inline char *portspeed(int portstatus)
  114. {
  115. char *speed_str;
  116. switch (portstatus & USB_PORT_STAT_SPEED_MASK) {
  117. case USB_PORT_STAT_SUPER_SPEED:
  118. speed_str = "5 Gb/s";
  119. break;
  120. case USB_PORT_STAT_HIGH_SPEED:
  121. speed_str = "480 Mb/s";
  122. break;
  123. case USB_PORT_STAT_LOW_SPEED:
  124. speed_str = "1.5 Mb/s";
  125. break;
  126. default:
  127. speed_str = "12 Mb/s";
  128. break;
  129. }
  130. return speed_str;
  131. }
  132. int legacy_hub_port_reset(struct usb_device *dev, int port,
  133. unsigned short *portstat)
  134. {
  135. int tries;
  136. ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
  137. unsigned short portstatus, portchange;
  138. #ifdef CONFIG_DM_USB
  139. debug("%s: resetting '%s' port %d...\n", __func__, dev->dev->name,
  140. port + 1);
  141. #else
  142. debug("%s: resetting port %d...\n", __func__, port + 1);
  143. #endif
  144. for (tries = 0; tries < MAX_TRIES; tries++) {
  145. usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
  146. mdelay(200);
  147. if (usb_get_port_status(dev, port + 1, portsts) < 0) {
  148. debug("get_port_status failed status %lX\n",
  149. dev->status);
  150. return -1;
  151. }
  152. portstatus = le16_to_cpu(portsts->wPortStatus);
  153. portchange = le16_to_cpu(portsts->wPortChange);
  154. debug("portstatus %x, change %x, %s\n", portstatus, portchange,
  155. portspeed(portstatus));
  156. debug("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
  157. " USB_PORT_STAT_ENABLE %d\n",
  158. (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
  159. (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
  160. (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
  161. /*
  162. * Perhaps we should check for the following here:
  163. * - C_CONNECTION hasn't been set.
  164. * - CONNECTION is still set.
  165. *
  166. * Doing so would ensure that the device is still connected
  167. * to the bus, and hasn't been unplugged or replaced while the
  168. * USB bus reset was going on.
  169. *
  170. * However, if we do that, then (at least) a San Disk Ultra
  171. * USB 3.0 16GB device fails to reset on (at least) an NVIDIA
  172. * Tegra Jetson TK1 board. For some reason, the device appears
  173. * to briefly drop off the bus when this second bus reset is
  174. * executed, yet if we retry this loop, it'll eventually come
  175. * back after another reset or two.
  176. */
  177. if (portstatus & USB_PORT_STAT_ENABLE)
  178. break;
  179. mdelay(200);
  180. }
  181. if (tries == MAX_TRIES) {
  182. debug("Cannot enable port %i after %i retries, " \
  183. "disabling port.\n", port + 1, MAX_TRIES);
  184. debug("Maybe the USB cable is bad?\n");
  185. return -1;
  186. }
  187. usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
  188. *portstat = portstatus;
  189. return 0;
  190. }
  191. #ifdef CONFIG_DM_USB
  192. int hub_port_reset(struct udevice *dev, int port, unsigned short *portstat)
  193. {
  194. struct usb_device *udev = dev_get_parentdata(dev);
  195. return legacy_hub_port_reset(udev, port, portstat);
  196. }
  197. #endif
  198. int usb_hub_port_connect_change(struct usb_device *dev, int port)
  199. {
  200. ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
  201. unsigned short portstatus;
  202. int ret, speed;
  203. /* Check status */
  204. ret = usb_get_port_status(dev, port + 1, portsts);
  205. if (ret < 0) {
  206. debug("get_port_status failed\n");
  207. return ret;
  208. }
  209. portstatus = le16_to_cpu(portsts->wPortStatus);
  210. debug("portstatus %x, change %x, %s\n",
  211. portstatus,
  212. le16_to_cpu(portsts->wPortChange),
  213. portspeed(portstatus));
  214. /* Clear the connection change status */
  215. usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
  216. /* Disconnect any existing devices under this port */
  217. if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
  218. (!(portstatus & USB_PORT_STAT_ENABLE))) ||
  219. usb_device_has_child_on_port(dev, port)) {
  220. debug("usb_disconnect(&hub->children[port]);\n");
  221. /* Return now if nothing is connected */
  222. if (!(portstatus & USB_PORT_STAT_CONNECTION))
  223. return -ENOTCONN;
  224. }
  225. mdelay(200);
  226. /* Reset the port */
  227. ret = legacy_hub_port_reset(dev, port, &portstatus);
  228. if (ret < 0) {
  229. printf("cannot reset port %i!?\n", port + 1);
  230. return ret;
  231. }
  232. mdelay(200);
  233. switch (portstatus & USB_PORT_STAT_SPEED_MASK) {
  234. case USB_PORT_STAT_SUPER_SPEED:
  235. speed = USB_SPEED_SUPER;
  236. break;
  237. case USB_PORT_STAT_HIGH_SPEED:
  238. speed = USB_SPEED_HIGH;
  239. break;
  240. case USB_PORT_STAT_LOW_SPEED:
  241. speed = USB_SPEED_LOW;
  242. break;
  243. default:
  244. speed = USB_SPEED_FULL;
  245. break;
  246. }
  247. #ifdef CONFIG_DM_USB
  248. struct udevice *child;
  249. ret = usb_scan_device(dev->dev, port + 1, speed, &child);
  250. #else
  251. struct usb_device *usb;
  252. ret = usb_alloc_new_device(dev->controller, &usb);
  253. if (ret) {
  254. printf("cannot create new device: ret=%d", ret);
  255. return ret;
  256. }
  257. dev->children[port] = usb;
  258. usb->speed = speed;
  259. usb->parent = dev;
  260. usb->portnr = port + 1;
  261. /* Run it through the hoops (find a driver, etc) */
  262. ret = usb_new_device(usb);
  263. if (ret < 0) {
  264. /* Woops, disable the port */
  265. usb_free_device(dev->controller);
  266. dev->children[port] = NULL;
  267. }
  268. #endif
  269. if (ret < 0) {
  270. debug("hub: disabling port %d\n", port + 1);
  271. usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
  272. }
  273. return ret;
  274. }
  275. static int usb_hub_configure(struct usb_device *dev)
  276. {
  277. int i, length;
  278. ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, USB_BUFSIZ);
  279. unsigned char *bitmap;
  280. short hubCharacteristics;
  281. struct usb_hub_descriptor *descriptor;
  282. struct usb_hub_device *hub;
  283. __maybe_unused struct usb_hub_status *hubsts;
  284. int ret;
  285. /* "allocate" Hub device */
  286. hub = usb_hub_allocate();
  287. if (hub == NULL)
  288. return -ENOMEM;
  289. hub->pusb_dev = dev;
  290. /* Get the the hub descriptor */
  291. ret = usb_get_hub_descriptor(dev, buffer, 4);
  292. if (ret < 0) {
  293. debug("usb_hub_configure: failed to get hub " \
  294. "descriptor, giving up %lX\n", dev->status);
  295. return ret;
  296. }
  297. descriptor = (struct usb_hub_descriptor *)buffer;
  298. length = min_t(int, descriptor->bLength,
  299. sizeof(struct usb_hub_descriptor));
  300. ret = usb_get_hub_descriptor(dev, buffer, length);
  301. if (ret < 0) {
  302. debug("usb_hub_configure: failed to get hub " \
  303. "descriptor 2nd giving up %lX\n", dev->status);
  304. return ret;
  305. }
  306. memcpy((unsigned char *)&hub->desc, buffer, length);
  307. /* adjust 16bit values */
  308. put_unaligned(le16_to_cpu(get_unaligned(
  309. &descriptor->wHubCharacteristics)),
  310. &hub->desc.wHubCharacteristics);
  311. /* set the bitmap */
  312. bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
  313. /* devices not removable by default */
  314. memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
  315. bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
  316. memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
  317. for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
  318. hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];
  319. for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
  320. hub->desc.PortPowerCtrlMask[i] = descriptor->PortPowerCtrlMask[i];
  321. dev->maxchild = descriptor->bNbrPorts;
  322. debug("%d ports detected\n", dev->maxchild);
  323. hubCharacteristics = get_unaligned(&hub->desc.wHubCharacteristics);
  324. switch (hubCharacteristics & HUB_CHAR_LPSM) {
  325. case 0x00:
  326. debug("ganged power switching\n");
  327. break;
  328. case 0x01:
  329. debug("individual port power switching\n");
  330. break;
  331. case 0x02:
  332. case 0x03:
  333. debug("unknown reserved power switching mode\n");
  334. break;
  335. }
  336. if (hubCharacteristics & HUB_CHAR_COMPOUND)
  337. debug("part of a compound device\n");
  338. else
  339. debug("standalone hub\n");
  340. switch (hubCharacteristics & HUB_CHAR_OCPM) {
  341. case 0x00:
  342. debug("global over-current protection\n");
  343. break;
  344. case 0x08:
  345. debug("individual port over-current protection\n");
  346. break;
  347. case 0x10:
  348. case 0x18:
  349. debug("no over-current protection\n");
  350. break;
  351. }
  352. debug("power on to power good time: %dms\n",
  353. descriptor->bPwrOn2PwrGood * 2);
  354. debug("hub controller current requirement: %dmA\n",
  355. descriptor->bHubContrCurrent);
  356. for (i = 0; i < dev->maxchild; i++)
  357. debug("port %d is%s removable\n", i + 1,
  358. hub->desc.DeviceRemovable[(i + 1) / 8] & \
  359. (1 << ((i + 1) % 8)) ? " not" : "");
  360. if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
  361. debug("usb_hub_configure: failed to get Status - " \
  362. "too long: %d\n", descriptor->bLength);
  363. return -EFBIG;
  364. }
  365. ret = usb_get_hub_status(dev, buffer);
  366. if (ret < 0) {
  367. debug("usb_hub_configure: failed to get Status %lX\n",
  368. dev->status);
  369. return ret;
  370. }
  371. #ifdef DEBUG
  372. hubsts = (struct usb_hub_status *)buffer;
  373. #endif
  374. debug("get_hub_status returned status %X, change %X\n",
  375. le16_to_cpu(hubsts->wHubStatus),
  376. le16_to_cpu(hubsts->wHubChange));
  377. debug("local power source is %s\n",
  378. (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
  379. "lost (inactive)" : "good");
  380. debug("%sover-current condition exists\n",
  381. (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
  382. "" : "no ");
  383. usb_hub_power_on(hub);
  384. /*
  385. * Reset any devices that may be in a bad state when applying
  386. * the power. This is a __weak function. Resetting of the devices
  387. * should occur in the board file of the device.
  388. */
  389. for (i = 0; i < dev->maxchild; i++)
  390. usb_hub_reset_devices(i + 1);
  391. for (i = 0; i < dev->maxchild; i++) {
  392. ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
  393. unsigned short portstatus, portchange;
  394. int ret;
  395. ulong start = get_timer(0);
  396. #ifdef CONFIG_DM_USB
  397. debug("\n\nScanning '%s' port %d\n", dev->dev->name, i + 1);
  398. #else
  399. debug("\n\nScanning port %d\n", i + 1);
  400. #endif
  401. /*
  402. * Wait for (whichever finishes first)
  403. * - A maximum of 10 seconds
  404. * This is a purely observational value driven by connecting
  405. * a few broken pen drives and taking the max * 1.5 approach
  406. * - connection_change and connection state to report same
  407. * state
  408. */
  409. do {
  410. ret = usb_get_port_status(dev, i + 1, portsts);
  411. if (ret < 0) {
  412. debug("get_port_status failed\n");
  413. break;
  414. }
  415. portstatus = le16_to_cpu(portsts->wPortStatus);
  416. portchange = le16_to_cpu(portsts->wPortChange);
  417. if ((portchange & USB_PORT_STAT_C_CONNECTION) ==
  418. (portstatus & USB_PORT_STAT_CONNECTION))
  419. break;
  420. } while (get_timer(start) < CONFIG_SYS_HZ * 10);
  421. if (ret < 0)
  422. continue;
  423. debug("Port %d Status %X Change %X\n",
  424. i + 1, portstatus, portchange);
  425. if (portchange & USB_PORT_STAT_C_CONNECTION) {
  426. debug("port %d connection change\n", i + 1);
  427. usb_hub_port_connect_change(dev, i);
  428. }
  429. if (portchange & USB_PORT_STAT_C_ENABLE) {
  430. debug("port %d enable change, status %x\n",
  431. i + 1, portstatus);
  432. usb_clear_port_feature(dev, i + 1,
  433. USB_PORT_FEAT_C_ENABLE);
  434. /*
  435. * The following hack causes a ghost device problem
  436. * to Faraday EHCI
  437. */
  438. #ifndef CONFIG_USB_EHCI_FARADAY
  439. /* EM interference sometimes causes bad shielded USB
  440. * devices to be shutdown by the hub, this hack enables
  441. * them again. Works at least with mouse driver */
  442. if (!(portstatus & USB_PORT_STAT_ENABLE) &&
  443. (portstatus & USB_PORT_STAT_CONNECTION) &&
  444. usb_device_has_child_on_port(dev, i)) {
  445. debug("already running port %i " \
  446. "disabled by hub (EMI?), " \
  447. "re-enabling...\n", i + 1);
  448. usb_hub_port_connect_change(dev, i);
  449. }
  450. #endif
  451. }
  452. if (portstatus & USB_PORT_STAT_SUSPEND) {
  453. debug("port %d suspend change\n", i + 1);
  454. usb_clear_port_feature(dev, i + 1,
  455. USB_PORT_FEAT_SUSPEND);
  456. }
  457. if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
  458. debug("port %d over-current change\n", i + 1);
  459. usb_clear_port_feature(dev, i + 1,
  460. USB_PORT_FEAT_C_OVER_CURRENT);
  461. usb_hub_power_on(hub);
  462. }
  463. if (portchange & USB_PORT_STAT_C_RESET) {
  464. debug("port %d reset change\n", i + 1);
  465. usb_clear_port_feature(dev, i + 1,
  466. USB_PORT_FEAT_C_RESET);
  467. }
  468. } /* end for i all ports */
  469. return 0;
  470. }
  471. static int usb_hub_check(struct usb_device *dev, int ifnum)
  472. {
  473. struct usb_interface *iface;
  474. struct usb_endpoint_descriptor *ep = NULL;
  475. iface = &dev->config.if_desc[ifnum];
  476. /* Is it a hub? */
  477. if (iface->desc.bInterfaceClass != USB_CLASS_HUB)
  478. goto err;
  479. /* Some hubs have a subclass of 1, which AFAICT according to the */
  480. /* specs is not defined, but it works */
  481. if ((iface->desc.bInterfaceSubClass != 0) &&
  482. (iface->desc.bInterfaceSubClass != 1))
  483. goto err;
  484. /* Multiple endpoints? What kind of mutant ninja-hub is this? */
  485. if (iface->desc.bNumEndpoints != 1)
  486. goto err;
  487. ep = &iface->ep_desc[0];
  488. /* Output endpoint? Curiousier and curiousier.. */
  489. if (!(ep->bEndpointAddress & USB_DIR_IN))
  490. goto err;
  491. /* If it's not an interrupt endpoint, we'd better punt! */
  492. if ((ep->bmAttributes & 3) != 3)
  493. goto err;
  494. /* We found a hub */
  495. debug("USB hub found\n");
  496. return 0;
  497. err:
  498. debug("USB hub not found: bInterfaceClass=%d, bInterfaceSubClass=%d, bNumEndpoints=%d\n",
  499. iface->desc.bInterfaceClass, iface->desc.bInterfaceSubClass,
  500. iface->desc.bNumEndpoints);
  501. if (ep) {
  502. debug(" bEndpointAddress=%#x, bmAttributes=%d",
  503. ep->bEndpointAddress, ep->bmAttributes);
  504. }
  505. return -ENOENT;
  506. }
  507. int usb_hub_probe(struct usb_device *dev, int ifnum)
  508. {
  509. int ret;
  510. ret = usb_hub_check(dev, ifnum);
  511. if (ret)
  512. return 0;
  513. ret = usb_hub_configure(dev);
  514. return ret;
  515. }
  516. #ifdef CONFIG_DM_USB
  517. int usb_hub_scan(struct udevice *hub)
  518. {
  519. struct usb_device *udev = dev_get_parentdata(hub);
  520. return usb_hub_configure(udev);
  521. }
  522. static int usb_hub_post_bind(struct udevice *dev)
  523. {
  524. /* Scan the bus for devices */
  525. return dm_scan_fdt_node(dev, gd->fdt_blob, dev->of_offset, false);
  526. }
  527. static int usb_hub_post_probe(struct udevice *dev)
  528. {
  529. debug("%s\n", __func__);
  530. return usb_hub_scan(dev);
  531. }
  532. static const struct udevice_id usb_hub_ids[] = {
  533. { .compatible = "usb-hub" },
  534. { }
  535. };
  536. U_BOOT_DRIVER(usb_generic_hub) = {
  537. .name = "usb_hub",
  538. .id = UCLASS_USB_HUB,
  539. .of_match = usb_hub_ids,
  540. .flags = DM_FLAG_ALLOC_PRIV_DMA,
  541. };
  542. UCLASS_DRIVER(usb_hub) = {
  543. .id = UCLASS_USB_HUB,
  544. .name = "usb_hub",
  545. .post_bind = usb_hub_post_bind,
  546. .post_probe = usb_hub_post_probe,
  547. .child_pre_probe = usb_child_pre_probe,
  548. .per_child_auto_alloc_size = sizeof(struct usb_device),
  549. .per_child_platdata_auto_alloc_size = sizeof(struct usb_dev_platdata),
  550. };
  551. static const struct usb_device_id hub_id_table[] = {
  552. {
  553. .match_flags = USB_DEVICE_ID_MATCH_DEV_CLASS,
  554. .bDeviceClass = USB_CLASS_HUB
  555. },
  556. { } /* Terminating entry */
  557. };
  558. USB_DEVICE(usb_generic_hub, hub_id_table);
  559. #endif