usb.c 34 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Most of this source has been derived from the Linux USB
  4. * project:
  5. * (C) Copyright Linus Torvalds 1999
  6. * (C) Copyright Johannes Erdfelt 1999-2001
  7. * (C) Copyright Andreas Gal 1999
  8. * (C) Copyright Gregory P. Smith 1999
  9. * (C) Copyright Deti Fliegl 1999 (new USB architecture)
  10. * (C) Copyright Randy Dunlap 2000
  11. * (C) Copyright David Brownell 2000 (kernel hotplug, usb_device_id)
  12. * (C) Copyright Yggdrasil Computing, Inc. 2000
  13. * (usb_device_id matching changes by Adam J. Richter)
  14. *
  15. * Adapted for U-Boot:
  16. * (C) Copyright 2001 Denis Peter, MPL AG Switzerland
  17. */
  18. /*
  19. * How it works:
  20. *
  21. * Since this is a bootloader, the devices will not be automatic
  22. * (re)configured on hotplug, but after a restart of the USB the
  23. * device should work.
  24. *
  25. * For each transfer (except "Interrupt") we wait for completion.
  26. */
  27. #include <common.h>
  28. #include <command.h>
  29. #include <dm.h>
  30. #include <memalign.h>
  31. #include <asm/processor.h>
  32. #include <linux/compiler.h>
  33. #include <linux/ctype.h>
  34. #include <asm/byteorder.h>
  35. #include <asm/unaligned.h>
  36. #include <errno.h>
  37. #include <usb.h>
  38. #define USB_BUFSIZ 512
  39. static int asynch_allowed;
  40. char usb_started; /* flag for the started/stopped USB status */
  41. #if !CONFIG_IS_ENABLED(DM_USB)
  42. static struct usb_device usb_dev[USB_MAX_DEVICE];
  43. static int dev_index;
  44. #ifndef CONFIG_USB_MAX_CONTROLLER_COUNT
  45. #define CONFIG_USB_MAX_CONTROLLER_COUNT 1
  46. #endif
  47. /***************************************************************************
  48. * Init USB Device
  49. */
  50. int usb_init(void)
  51. {
  52. void *ctrl;
  53. struct usb_device *dev;
  54. int i, start_index = 0;
  55. int controllers_initialized = 0;
  56. int ret;
  57. dev_index = 0;
  58. asynch_allowed = 1;
  59. usb_hub_reset();
  60. /* first make all devices unknown */
  61. for (i = 0; i < USB_MAX_DEVICE; i++) {
  62. memset(&usb_dev[i], 0, sizeof(struct usb_device));
  63. usb_dev[i].devnum = -1;
  64. }
  65. /* init low_level USB */
  66. for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) {
  67. /* init low_level USB */
  68. printf("USB%d: ", i);
  69. ret = usb_lowlevel_init(i, USB_INIT_HOST, &ctrl);
  70. if (ret == -ENODEV) { /* No such device. */
  71. puts("Port not available.\n");
  72. controllers_initialized++;
  73. continue;
  74. }
  75. if (ret) { /* Other error. */
  76. puts("lowlevel init failed\n");
  77. continue;
  78. }
  79. /*
  80. * lowlevel init is OK, now scan the bus for devices
  81. * i.e. search HUBs and configure them
  82. */
  83. controllers_initialized++;
  84. start_index = dev_index;
  85. printf("scanning bus %d for devices... ", i);
  86. ret = usb_alloc_new_device(ctrl, &dev);
  87. if (ret)
  88. break;
  89. /*
  90. * device 0 is always present
  91. * (root hub, so let it analyze)
  92. */
  93. ret = usb_new_device(dev);
  94. if (ret)
  95. usb_free_device(dev->controller);
  96. if (start_index == dev_index) {
  97. puts("No USB Device found\n");
  98. continue;
  99. } else {
  100. printf("%d USB Device(s) found\n",
  101. dev_index - start_index);
  102. }
  103. usb_started = 1;
  104. }
  105. debug("scan end\n");
  106. /* if we were not able to find at least one working bus, bail out */
  107. if (controllers_initialized == 0)
  108. puts("USB error: all controllers failed lowlevel init\n");
  109. return usb_started ? 0 : -ENODEV;
  110. }
  111. /******************************************************************************
  112. * Stop USB this stops the LowLevel Part and deregisters USB devices.
  113. */
  114. int usb_stop(void)
  115. {
  116. int i;
  117. if (usb_started) {
  118. asynch_allowed = 1;
  119. usb_started = 0;
  120. usb_hub_reset();
  121. for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) {
  122. if (usb_lowlevel_stop(i))
  123. printf("failed to stop USB controller %d\n", i);
  124. }
  125. }
  126. return 0;
  127. }
  128. /******************************************************************************
  129. * Detect if a USB device has been plugged or unplugged.
  130. */
  131. int usb_detect_change(void)
  132. {
  133. int i, j;
  134. int change = 0;
  135. for (j = 0; j < USB_MAX_DEVICE; j++) {
  136. for (i = 0; i < usb_dev[j].maxchild; i++) {
  137. struct usb_port_status status;
  138. if (usb_get_port_status(&usb_dev[j], i + 1,
  139. &status) < 0)
  140. /* USB request failed */
  141. continue;
  142. if (le16_to_cpu(status.wPortChange) &
  143. USB_PORT_STAT_C_CONNECTION)
  144. change++;
  145. }
  146. }
  147. return change;
  148. }
  149. /*
  150. * disables the asynch behaviour of the control message. This is used for data
  151. * transfers that uses the exclusiv access to the control and bulk messages.
  152. * Returns the old value so it can be restored later.
  153. */
  154. int usb_disable_asynch(int disable)
  155. {
  156. int old_value = asynch_allowed;
  157. asynch_allowed = !disable;
  158. return old_value;
  159. }
  160. #endif /* !CONFIG_IS_ENABLED(DM_USB) */
  161. /*-------------------------------------------------------------------
  162. * Message wrappers.
  163. *
  164. */
  165. /*
  166. * submits an Interrupt Message. Some drivers may implement non-blocking
  167. * polling: when non-block is true and the device is not responding return
  168. * -EAGAIN instead of waiting for device to respond.
  169. */
  170. int usb_int_msg(struct usb_device *dev, unsigned long pipe,
  171. void *buffer, int transfer_len, int interval, bool nonblock)
  172. {
  173. return submit_int_msg(dev, pipe, buffer, transfer_len, interval,
  174. nonblock);
  175. }
  176. /*
  177. * submits a control message and waits for comletion (at least timeout * 1ms)
  178. * If timeout is 0, we don't wait for completion (used as example to set and
  179. * clear keyboards LEDs). For data transfers, (storage transfers) we don't
  180. * allow control messages with 0 timeout, by previousely resetting the flag
  181. * asynch_allowed (usb_disable_asynch(1)).
  182. * returns the transferred length if OK or -1 if error. The transferred length
  183. * and the current status are stored in the dev->act_len and dev->status.
  184. */
  185. int usb_control_msg(struct usb_device *dev, unsigned int pipe,
  186. unsigned char request, unsigned char requesttype,
  187. unsigned short value, unsigned short index,
  188. void *data, unsigned short size, int timeout)
  189. {
  190. ALLOC_CACHE_ALIGN_BUFFER(struct devrequest, setup_packet, 1);
  191. int err;
  192. if ((timeout == 0) && (!asynch_allowed)) {
  193. /* request for a asynch control pipe is not allowed */
  194. return -EINVAL;
  195. }
  196. /* set setup command */
  197. setup_packet->requesttype = requesttype;
  198. setup_packet->request = request;
  199. setup_packet->value = cpu_to_le16(value);
  200. setup_packet->index = cpu_to_le16(index);
  201. setup_packet->length = cpu_to_le16(size);
  202. debug("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
  203. "value 0x%X index 0x%X length 0x%X\n",
  204. request, requesttype, value, index, size);
  205. dev->status = USB_ST_NOT_PROC; /*not yet processed */
  206. err = submit_control_msg(dev, pipe, data, size, setup_packet);
  207. if (err < 0)
  208. return err;
  209. if (timeout == 0)
  210. return (int)size;
  211. /*
  212. * Wait for status to update until timeout expires, USB driver
  213. * interrupt handler may set the status when the USB operation has
  214. * been completed.
  215. */
  216. while (timeout--) {
  217. if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
  218. break;
  219. mdelay(1);
  220. }
  221. if (dev->status)
  222. return -1;
  223. return dev->act_len;
  224. }
  225. /*-------------------------------------------------------------------
  226. * submits bulk message, and waits for completion. returns 0 if Ok or
  227. * negative if Error.
  228. * synchronous behavior
  229. */
  230. int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
  231. void *data, int len, int *actual_length, int timeout)
  232. {
  233. if (len < 0)
  234. return -EINVAL;
  235. dev->status = USB_ST_NOT_PROC; /*not yet processed */
  236. if (submit_bulk_msg(dev, pipe, data, len) < 0)
  237. return -EIO;
  238. while (timeout--) {
  239. if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
  240. break;
  241. mdelay(1);
  242. }
  243. *actual_length = dev->act_len;
  244. if (dev->status == 0)
  245. return 0;
  246. else
  247. return -EIO;
  248. }
  249. /*-------------------------------------------------------------------
  250. * Max Packet stuff
  251. */
  252. /*
  253. * returns the max packet size, depending on the pipe direction and
  254. * the configurations values
  255. */
  256. int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
  257. {
  258. /* direction is out -> use emaxpacket out */
  259. if ((pipe & USB_DIR_IN) == 0)
  260. return dev->epmaxpacketout[((pipe>>15) & 0xf)];
  261. else
  262. return dev->epmaxpacketin[((pipe>>15) & 0xf)];
  263. }
  264. /*
  265. * The routine usb_set_maxpacket_ep() is extracted from the loop of routine
  266. * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
  267. * when it is inlined in 1 single routine. What happens is that the register r3
  268. * is used as loop-count 'i', but gets overwritten later on.
  269. * This is clearly a compiler bug, but it is easier to workaround it here than
  270. * to update the compiler (Occurs with at least several GCC 4.{1,2},x
  271. * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
  272. *
  273. * NOTE: Similar behaviour was observed with GCC4.6 on ARMv5.
  274. */
  275. static void noinline
  276. usb_set_maxpacket_ep(struct usb_device *dev, int if_idx, int ep_idx)
  277. {
  278. int b;
  279. struct usb_endpoint_descriptor *ep;
  280. u16 ep_wMaxPacketSize;
  281. ep = &dev->config.if_desc[if_idx].ep_desc[ep_idx];
  282. b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
  283. ep_wMaxPacketSize = get_unaligned(&ep->wMaxPacketSize);
  284. if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
  285. USB_ENDPOINT_XFER_CONTROL) {
  286. /* Control => bidirectional */
  287. dev->epmaxpacketout[b] = ep_wMaxPacketSize;
  288. dev->epmaxpacketin[b] = ep_wMaxPacketSize;
  289. debug("##Control EP epmaxpacketout/in[%d] = %d\n",
  290. b, dev->epmaxpacketin[b]);
  291. } else {
  292. if ((ep->bEndpointAddress & 0x80) == 0) {
  293. /* OUT Endpoint */
  294. if (ep_wMaxPacketSize > dev->epmaxpacketout[b]) {
  295. dev->epmaxpacketout[b] = ep_wMaxPacketSize;
  296. debug("##EP epmaxpacketout[%d] = %d\n",
  297. b, dev->epmaxpacketout[b]);
  298. }
  299. } else {
  300. /* IN Endpoint */
  301. if (ep_wMaxPacketSize > dev->epmaxpacketin[b]) {
  302. dev->epmaxpacketin[b] = ep_wMaxPacketSize;
  303. debug("##EP epmaxpacketin[%d] = %d\n",
  304. b, dev->epmaxpacketin[b]);
  305. }
  306. } /* if out */
  307. } /* if control */
  308. }
  309. /*
  310. * set the max packed value of all endpoints in the given configuration
  311. */
  312. static int usb_set_maxpacket(struct usb_device *dev)
  313. {
  314. int i, ii;
  315. for (i = 0; i < dev->config.desc.bNumInterfaces; i++)
  316. for (ii = 0; ii < dev->config.if_desc[i].desc.bNumEndpoints; ii++)
  317. usb_set_maxpacket_ep(dev, i, ii);
  318. return 0;
  319. }
  320. /*******************************************************************************
  321. * Parse the config, located in buffer, and fills the dev->config structure.
  322. * Note that all little/big endian swapping are done automatically.
  323. * (wTotalLength has already been swapped and sanitized when it was read.)
  324. */
  325. static int usb_parse_config(struct usb_device *dev,
  326. unsigned char *buffer, int cfgno)
  327. {
  328. struct usb_descriptor_header *head;
  329. int index, ifno, epno, curr_if_num;
  330. u16 ep_wMaxPacketSize;
  331. struct usb_interface *if_desc = NULL;
  332. ifno = -1;
  333. epno = -1;
  334. curr_if_num = -1;
  335. dev->configno = cfgno;
  336. head = (struct usb_descriptor_header *) &buffer[0];
  337. if (head->bDescriptorType != USB_DT_CONFIG) {
  338. printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
  339. head->bDescriptorType);
  340. return -EINVAL;
  341. }
  342. if (head->bLength != USB_DT_CONFIG_SIZE) {
  343. printf("ERROR: Invalid USB CFG length (%d)\n", head->bLength);
  344. return -EINVAL;
  345. }
  346. memcpy(&dev->config, head, USB_DT_CONFIG_SIZE);
  347. dev->config.no_of_if = 0;
  348. index = dev->config.desc.bLength;
  349. /* Ok the first entry must be a configuration entry,
  350. * now process the others */
  351. head = (struct usb_descriptor_header *) &buffer[index];
  352. while (index + 1 < dev->config.desc.wTotalLength && head->bLength) {
  353. switch (head->bDescriptorType) {
  354. case USB_DT_INTERFACE:
  355. if (head->bLength != USB_DT_INTERFACE_SIZE) {
  356. printf("ERROR: Invalid USB IF length (%d)\n",
  357. head->bLength);
  358. break;
  359. }
  360. if (index + USB_DT_INTERFACE_SIZE >
  361. dev->config.desc.wTotalLength) {
  362. puts("USB IF descriptor overflowed buffer!\n");
  363. break;
  364. }
  365. if (((struct usb_interface_descriptor *) \
  366. head)->bInterfaceNumber != curr_if_num) {
  367. /* this is a new interface, copy new desc */
  368. ifno = dev->config.no_of_if;
  369. if (ifno >= USB_MAXINTERFACES) {
  370. puts("Too many USB interfaces!\n");
  371. /* try to go on with what we have */
  372. return -EINVAL;
  373. }
  374. if_desc = &dev->config.if_desc[ifno];
  375. dev->config.no_of_if++;
  376. memcpy(if_desc, head,
  377. USB_DT_INTERFACE_SIZE);
  378. if_desc->no_of_ep = 0;
  379. if_desc->num_altsetting = 1;
  380. curr_if_num =
  381. if_desc->desc.bInterfaceNumber;
  382. } else {
  383. /* found alternate setting for the interface */
  384. if (ifno >= 0) {
  385. if_desc = &dev->config.if_desc[ifno];
  386. if_desc->num_altsetting++;
  387. }
  388. }
  389. break;
  390. case USB_DT_ENDPOINT:
  391. if (head->bLength != USB_DT_ENDPOINT_SIZE &&
  392. head->bLength != USB_DT_ENDPOINT_AUDIO_SIZE) {
  393. printf("ERROR: Invalid USB EP length (%d)\n",
  394. head->bLength);
  395. break;
  396. }
  397. if (index + head->bLength >
  398. dev->config.desc.wTotalLength) {
  399. puts("USB EP descriptor overflowed buffer!\n");
  400. break;
  401. }
  402. if (ifno < 0) {
  403. puts("Endpoint descriptor out of order!\n");
  404. break;
  405. }
  406. epno = dev->config.if_desc[ifno].no_of_ep;
  407. if_desc = &dev->config.if_desc[ifno];
  408. if (epno >= USB_MAXENDPOINTS) {
  409. printf("Interface %d has too many endpoints!\n",
  410. if_desc->desc.bInterfaceNumber);
  411. return -EINVAL;
  412. }
  413. /* found an endpoint */
  414. if_desc->no_of_ep++;
  415. memcpy(&if_desc->ep_desc[epno], head,
  416. USB_DT_ENDPOINT_SIZE);
  417. ep_wMaxPacketSize = get_unaligned(&dev->config.\
  418. if_desc[ifno].\
  419. ep_desc[epno].\
  420. wMaxPacketSize);
  421. put_unaligned(le16_to_cpu(ep_wMaxPacketSize),
  422. &dev->config.\
  423. if_desc[ifno].\
  424. ep_desc[epno].\
  425. wMaxPacketSize);
  426. debug("if %d, ep %d\n", ifno, epno);
  427. break;
  428. case USB_DT_SS_ENDPOINT_COMP:
  429. if (head->bLength != USB_DT_SS_EP_COMP_SIZE) {
  430. printf("ERROR: Invalid USB EPC length (%d)\n",
  431. head->bLength);
  432. break;
  433. }
  434. if (index + USB_DT_SS_EP_COMP_SIZE >
  435. dev->config.desc.wTotalLength) {
  436. puts("USB EPC descriptor overflowed buffer!\n");
  437. break;
  438. }
  439. if (ifno < 0 || epno < 0) {
  440. puts("EPC descriptor out of order!\n");
  441. break;
  442. }
  443. if_desc = &dev->config.if_desc[ifno];
  444. memcpy(&if_desc->ss_ep_comp_desc[epno], head,
  445. USB_DT_SS_EP_COMP_SIZE);
  446. break;
  447. default:
  448. if (head->bLength == 0)
  449. return -EINVAL;
  450. debug("unknown Description Type : %x\n",
  451. head->bDescriptorType);
  452. #ifdef DEBUG
  453. {
  454. unsigned char *ch = (unsigned char *)head;
  455. int i;
  456. for (i = 0; i < head->bLength; i++)
  457. debug("%02X ", *ch++);
  458. debug("\n\n\n");
  459. }
  460. #endif
  461. break;
  462. }
  463. index += head->bLength;
  464. head = (struct usb_descriptor_header *)&buffer[index];
  465. }
  466. return 0;
  467. }
  468. /***********************************************************************
  469. * Clears an endpoint
  470. * endp: endpoint number in bits 0-3;
  471. * direction flag in bit 7 (1 = IN, 0 = OUT)
  472. */
  473. int usb_clear_halt(struct usb_device *dev, int pipe)
  474. {
  475. int result;
  476. int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
  477. result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
  478. USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
  479. endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
  480. /* don't clear if failed */
  481. if (result < 0)
  482. return result;
  483. /*
  484. * NOTE: we do not get status and verify reset was successful
  485. * as some devices are reported to lock up upon this check..
  486. */
  487. usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
  488. /* toggle is reset on clear */
  489. usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
  490. return 0;
  491. }
  492. /**********************************************************************
  493. * get_descriptor type
  494. */
  495. static int usb_get_descriptor(struct usb_device *dev, unsigned char type,
  496. unsigned char index, void *buf, int size)
  497. {
  498. return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
  499. USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
  500. (type << 8) + index, 0, buf, size,
  501. USB_CNTL_TIMEOUT);
  502. }
  503. /**********************************************************************
  504. * gets len of configuration cfgno
  505. */
  506. int usb_get_configuration_len(struct usb_device *dev, int cfgno)
  507. {
  508. int result;
  509. ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, 9);
  510. struct usb_config_descriptor *config;
  511. config = (struct usb_config_descriptor *)&buffer[0];
  512. result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
  513. if (result < 9) {
  514. if (result < 0)
  515. printf("unable to get descriptor, error %lX\n",
  516. dev->status);
  517. else
  518. printf("config descriptor too short " \
  519. "(expected %i, got %i)\n", 9, result);
  520. return -EIO;
  521. }
  522. return le16_to_cpu(config->wTotalLength);
  523. }
  524. /**********************************************************************
  525. * gets configuration cfgno and store it in the buffer
  526. */
  527. int usb_get_configuration_no(struct usb_device *dev, int cfgno,
  528. unsigned char *buffer, int length)
  529. {
  530. int result;
  531. struct usb_config_descriptor *config;
  532. config = (struct usb_config_descriptor *)&buffer[0];
  533. result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, length);
  534. debug("get_conf_no %d Result %d, wLength %d\n", cfgno, result,
  535. le16_to_cpu(config->wTotalLength));
  536. config->wTotalLength = result; /* validated, with CPU byte order */
  537. return result;
  538. }
  539. /********************************************************************
  540. * set address of a device to the value in dev->devnum.
  541. * This can only be done by addressing the device via the default address (0)
  542. */
  543. static int usb_set_address(struct usb_device *dev)
  544. {
  545. debug("set address %d\n", dev->devnum);
  546. return usb_control_msg(dev, usb_snddefctrl(dev), USB_REQ_SET_ADDRESS,
  547. 0, (dev->devnum), 0, NULL, 0, USB_CNTL_TIMEOUT);
  548. }
  549. /********************************************************************
  550. * set interface number to interface
  551. */
  552. int usb_set_interface(struct usb_device *dev, int interface, int alternate)
  553. {
  554. struct usb_interface *if_face = NULL;
  555. int ret, i;
  556. for (i = 0; i < dev->config.desc.bNumInterfaces; i++) {
  557. if (dev->config.if_desc[i].desc.bInterfaceNumber == interface) {
  558. if_face = &dev->config.if_desc[i];
  559. break;
  560. }
  561. }
  562. if (!if_face) {
  563. printf("selecting invalid interface %d", interface);
  564. return -EINVAL;
  565. }
  566. /*
  567. * We should return now for devices with only one alternate setting.
  568. * According to 9.4.10 of the Universal Serial Bus Specification
  569. * Revision 2.0 such devices can return with a STALL. This results in
  570. * some USB sticks timeouting during initialization and then being
  571. * unusable in U-Boot.
  572. */
  573. if (if_face->num_altsetting == 1)
  574. return 0;
  575. ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
  576. USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
  577. alternate, interface, NULL, 0,
  578. USB_CNTL_TIMEOUT * 5);
  579. if (ret < 0)
  580. return ret;
  581. return 0;
  582. }
  583. /********************************************************************
  584. * set configuration number to configuration
  585. */
  586. static int usb_set_configuration(struct usb_device *dev, int configuration)
  587. {
  588. int res;
  589. debug("set configuration %d\n", configuration);
  590. /* set setup command */
  591. res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
  592. USB_REQ_SET_CONFIGURATION, 0,
  593. configuration, 0,
  594. NULL, 0, USB_CNTL_TIMEOUT);
  595. if (res == 0) {
  596. dev->toggle[0] = 0;
  597. dev->toggle[1] = 0;
  598. return 0;
  599. } else
  600. return -EIO;
  601. }
  602. /********************************************************************
  603. * set protocol to protocol
  604. */
  605. int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
  606. {
  607. return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
  608. USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
  609. protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
  610. }
  611. /********************************************************************
  612. * set idle
  613. */
  614. int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
  615. {
  616. return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
  617. USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
  618. (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
  619. }
  620. /********************************************************************
  621. * get report
  622. */
  623. int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
  624. unsigned char id, void *buf, int size)
  625. {
  626. return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
  627. USB_REQ_GET_REPORT,
  628. USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
  629. (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
  630. }
  631. /********************************************************************
  632. * get class descriptor
  633. */
  634. int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
  635. unsigned char type, unsigned char id, void *buf, int size)
  636. {
  637. return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
  638. USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
  639. (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
  640. }
  641. /********************************************************************
  642. * get string index in buffer
  643. */
  644. static int usb_get_string(struct usb_device *dev, unsigned short langid,
  645. unsigned char index, void *buf, int size)
  646. {
  647. int i;
  648. int result;
  649. for (i = 0; i < 3; ++i) {
  650. /* some devices are flaky */
  651. result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
  652. USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
  653. (USB_DT_STRING << 8) + index, langid, buf, size,
  654. USB_CNTL_TIMEOUT);
  655. if (result > 0)
  656. break;
  657. }
  658. return result;
  659. }
  660. static void usb_try_string_workarounds(unsigned char *buf, int *length)
  661. {
  662. int newlength, oldlength = *length;
  663. for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
  664. if (!isprint(buf[newlength]) || buf[newlength + 1])
  665. break;
  666. if (newlength > 2) {
  667. buf[0] = newlength;
  668. *length = newlength;
  669. }
  670. }
  671. static int usb_string_sub(struct usb_device *dev, unsigned int langid,
  672. unsigned int index, unsigned char *buf)
  673. {
  674. int rc;
  675. /* Try to read the string descriptor by asking for the maximum
  676. * possible number of bytes */
  677. rc = usb_get_string(dev, langid, index, buf, 255);
  678. /* If that failed try to read the descriptor length, then
  679. * ask for just that many bytes */
  680. if (rc < 2) {
  681. rc = usb_get_string(dev, langid, index, buf, 2);
  682. if (rc == 2)
  683. rc = usb_get_string(dev, langid, index, buf, buf[0]);
  684. }
  685. if (rc >= 2) {
  686. if (!buf[0] && !buf[1])
  687. usb_try_string_workarounds(buf, &rc);
  688. /* There might be extra junk at the end of the descriptor */
  689. if (buf[0] < rc)
  690. rc = buf[0];
  691. rc = rc - (rc & 1); /* force a multiple of two */
  692. }
  693. if (rc < 2)
  694. rc = -EINVAL;
  695. return rc;
  696. }
  697. /********************************************************************
  698. * usb_string:
  699. * Get string index and translate it to ascii.
  700. * returns string length (> 0) or error (< 0)
  701. */
  702. int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
  703. {
  704. ALLOC_CACHE_ALIGN_BUFFER(unsigned char, mybuf, USB_BUFSIZ);
  705. unsigned char *tbuf;
  706. int err;
  707. unsigned int u, idx;
  708. if (size <= 0 || !buf || !index)
  709. return -EINVAL;
  710. buf[0] = 0;
  711. tbuf = &mybuf[0];
  712. /* get langid for strings if it's not yet known */
  713. if (!dev->have_langid) {
  714. err = usb_string_sub(dev, 0, 0, tbuf);
  715. if (err < 0) {
  716. debug("error getting string descriptor 0 " \
  717. "(error=%lx)\n", dev->status);
  718. return -EIO;
  719. } else if (tbuf[0] < 4) {
  720. debug("string descriptor 0 too short\n");
  721. return -EIO;
  722. } else {
  723. dev->have_langid = -1;
  724. dev->string_langid = tbuf[2] | (tbuf[3] << 8);
  725. /* always use the first langid listed */
  726. debug("USB device number %d default " \
  727. "language ID 0x%x\n",
  728. dev->devnum, dev->string_langid);
  729. }
  730. }
  731. err = usb_string_sub(dev, dev->string_langid, index, tbuf);
  732. if (err < 0)
  733. return err;
  734. size--; /* leave room for trailing NULL char in output buffer */
  735. for (idx = 0, u = 2; u < err; u += 2) {
  736. if (idx >= size)
  737. break;
  738. if (tbuf[u+1]) /* high byte */
  739. buf[idx++] = '?'; /* non-ASCII character */
  740. else
  741. buf[idx++] = tbuf[u];
  742. }
  743. buf[idx] = 0;
  744. err = idx;
  745. return err;
  746. }
  747. /********************************************************************
  748. * USB device handling:
  749. * the USB device are static allocated [USB_MAX_DEVICE].
  750. */
  751. #if !CONFIG_IS_ENABLED(DM_USB)
  752. /* returns a pointer to the device with the index [index].
  753. * if the device is not assigned (dev->devnum==-1) returns NULL
  754. */
  755. struct usb_device *usb_get_dev_index(int index)
  756. {
  757. if (usb_dev[index].devnum == -1)
  758. return NULL;
  759. else
  760. return &usb_dev[index];
  761. }
  762. int usb_alloc_new_device(struct udevice *controller, struct usb_device **devp)
  763. {
  764. int i;
  765. debug("New Device %d\n", dev_index);
  766. if (dev_index == USB_MAX_DEVICE) {
  767. printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
  768. return -ENOSPC;
  769. }
  770. /* default Address is 0, real addresses start with 1 */
  771. usb_dev[dev_index].devnum = dev_index + 1;
  772. usb_dev[dev_index].maxchild = 0;
  773. for (i = 0; i < USB_MAXCHILDREN; i++)
  774. usb_dev[dev_index].children[i] = NULL;
  775. usb_dev[dev_index].parent = NULL;
  776. usb_dev[dev_index].controller = controller;
  777. dev_index++;
  778. *devp = &usb_dev[dev_index - 1];
  779. return 0;
  780. }
  781. /*
  782. * Free the newly created device node.
  783. * Called in error cases where configuring a newly attached
  784. * device fails for some reason.
  785. */
  786. void usb_free_device(struct udevice *controller)
  787. {
  788. dev_index--;
  789. debug("Freeing device node: %d\n", dev_index);
  790. memset(&usb_dev[dev_index], 0, sizeof(struct usb_device));
  791. usb_dev[dev_index].devnum = -1;
  792. }
  793. /*
  794. * XHCI issues Enable Slot command and thereafter
  795. * allocates device contexts. Provide a weak alias
  796. * function for the purpose, so that XHCI overrides it
  797. * and EHCI/OHCI just work out of the box.
  798. */
  799. __weak int usb_alloc_device(struct usb_device *udev)
  800. {
  801. return 0;
  802. }
  803. #endif /* !CONFIG_IS_ENABLED(DM_USB) */
  804. static int usb_hub_port_reset(struct usb_device *dev, struct usb_device *hub)
  805. {
  806. if (!hub)
  807. usb_reset_root_port(dev);
  808. return 0;
  809. }
  810. static int get_descriptor_len(struct usb_device *dev, int len, int expect_len)
  811. {
  812. __maybe_unused struct usb_device_descriptor *desc;
  813. ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf, USB_BUFSIZ);
  814. int err;
  815. desc = (struct usb_device_descriptor *)tmpbuf;
  816. err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, len);
  817. if (err < expect_len) {
  818. if (err < 0) {
  819. printf("unable to get device descriptor (error=%d)\n",
  820. err);
  821. return err;
  822. } else {
  823. printf("USB device descriptor short read (expected %i, got %i)\n",
  824. expect_len, err);
  825. return -EIO;
  826. }
  827. }
  828. memcpy(&dev->descriptor, tmpbuf, sizeof(dev->descriptor));
  829. return 0;
  830. }
  831. static int usb_setup_descriptor(struct usb_device *dev, bool do_read)
  832. {
  833. /*
  834. * This is a Windows scheme of initialization sequence, with double
  835. * reset of the device (Linux uses the same sequence)
  836. * Some equipment is said to work only with such init sequence; this
  837. * patch is based on the work by Alan Stern:
  838. * http://sourceforge.net/mailarchive/forum.php?
  839. * thread_id=5729457&forum_id=5398
  840. */
  841. /*
  842. * send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
  843. * only 18 bytes long, this will terminate with a short packet. But if
  844. * the maxpacket size is 8 or 16 the device may be waiting to transmit
  845. * some more, or keeps on retransmitting the 8 byte header.
  846. */
  847. if (dev->speed == USB_SPEED_LOW) {
  848. dev->descriptor.bMaxPacketSize0 = 8;
  849. dev->maxpacketsize = PACKET_SIZE_8;
  850. } else {
  851. dev->descriptor.bMaxPacketSize0 = 64;
  852. dev->maxpacketsize = PACKET_SIZE_64;
  853. }
  854. dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
  855. dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
  856. if (do_read && dev->speed == USB_SPEED_FULL) {
  857. int err;
  858. /*
  859. * Validate we've received only at least 8 bytes, not that
  860. * we've received the entire descriptor. The reasoning is:
  861. * - The code only uses fields in the first 8 bytes, so
  862. * that's all we need to have fetched at this stage.
  863. * - The smallest maxpacket size is 8 bytes. Before we know
  864. * the actual maxpacket the device uses, the USB controller
  865. * may only accept a single packet. Consequently we are only
  866. * guaranteed to receive 1 packet (at least 8 bytes) even in
  867. * a non-error case.
  868. *
  869. * At least the DWC2 controller needs to be programmed with
  870. * the number of packets in addition to the number of bytes.
  871. * A request for 64 bytes of data with the maxpacket guessed
  872. * as 64 (above) yields a request for 1 packet.
  873. */
  874. err = get_descriptor_len(dev, 64, 8);
  875. if (err)
  876. return err;
  877. }
  878. dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
  879. dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
  880. switch (dev->descriptor.bMaxPacketSize0) {
  881. case 8:
  882. dev->maxpacketsize = PACKET_SIZE_8;
  883. break;
  884. case 16:
  885. dev->maxpacketsize = PACKET_SIZE_16;
  886. break;
  887. case 32:
  888. dev->maxpacketsize = PACKET_SIZE_32;
  889. break;
  890. case 64:
  891. dev->maxpacketsize = PACKET_SIZE_64;
  892. break;
  893. default:
  894. printf("%s: invalid max packet size\n", __func__);
  895. return -EIO;
  896. }
  897. return 0;
  898. }
  899. static int usb_prepare_device(struct usb_device *dev, int addr, bool do_read,
  900. struct usb_device *parent)
  901. {
  902. int err;
  903. /*
  904. * Allocate usb 3.0 device context.
  905. * USB 3.0 (xHCI) protocol tries to allocate device slot
  906. * and related data structures first. This call does that.
  907. * Refer to sec 4.3.2 in xHCI spec rev1.0
  908. */
  909. err = usb_alloc_device(dev);
  910. if (err) {
  911. printf("Cannot allocate device context to get SLOT_ID\n");
  912. return err;
  913. }
  914. err = usb_setup_descriptor(dev, do_read);
  915. if (err)
  916. return err;
  917. err = usb_hub_port_reset(dev, parent);
  918. if (err)
  919. return err;
  920. dev->devnum = addr;
  921. err = usb_set_address(dev); /* set address */
  922. if (err < 0) {
  923. printf("\n USB device not accepting new address " \
  924. "(error=%lX)\n", dev->status);
  925. return err;
  926. }
  927. mdelay(10); /* Let the SET_ADDRESS settle */
  928. /*
  929. * If we haven't read device descriptor before, read it here
  930. * after device is assigned an address. This is only applicable
  931. * to xHCI so far.
  932. */
  933. if (!do_read) {
  934. err = usb_setup_descriptor(dev, true);
  935. if (err)
  936. return err;
  937. }
  938. return 0;
  939. }
  940. int usb_select_config(struct usb_device *dev)
  941. {
  942. unsigned char *tmpbuf = NULL;
  943. int err;
  944. err = get_descriptor_len(dev, USB_DT_DEVICE_SIZE, USB_DT_DEVICE_SIZE);
  945. if (err)
  946. return err;
  947. /* correct le values */
  948. le16_to_cpus(&dev->descriptor.bcdUSB);
  949. le16_to_cpus(&dev->descriptor.idVendor);
  950. le16_to_cpus(&dev->descriptor.idProduct);
  951. le16_to_cpus(&dev->descriptor.bcdDevice);
  952. /*
  953. * Kingston DT Ultimate 32GB USB 3.0 seems to be extremely sensitive
  954. * about this first Get Descriptor request. If there are any other
  955. * requests in the first microframe, the stick crashes. Wait about
  956. * one microframe duration here (1mS for USB 1.x , 125uS for USB 2.0).
  957. */
  958. mdelay(1);
  959. /* only support for one config for now */
  960. err = usb_get_configuration_len(dev, 0);
  961. if (err >= 0) {
  962. tmpbuf = (unsigned char *)malloc_cache_aligned(err);
  963. if (!tmpbuf)
  964. err = -ENOMEM;
  965. else
  966. err = usb_get_configuration_no(dev, 0, tmpbuf, err);
  967. }
  968. if (err < 0) {
  969. printf("usb_new_device: Cannot read configuration, " \
  970. "skipping device %04x:%04x\n",
  971. dev->descriptor.idVendor, dev->descriptor.idProduct);
  972. free(tmpbuf);
  973. return err;
  974. }
  975. usb_parse_config(dev, tmpbuf, 0);
  976. free(tmpbuf);
  977. usb_set_maxpacket(dev);
  978. /*
  979. * we set the default configuration here
  980. * This seems premature. If the driver wants a different configuration
  981. * it will need to select itself.
  982. */
  983. err = usb_set_configuration(dev, dev->config.desc.bConfigurationValue);
  984. if (err < 0) {
  985. printf("failed to set default configuration " \
  986. "len %d, status %lX\n", dev->act_len, dev->status);
  987. return err;
  988. }
  989. /*
  990. * Wait until the Set Configuration request gets processed by the
  991. * device. This is required by at least SanDisk Cruzer Pop USB 2.0
  992. * and Kingston DT Ultimate 32GB USB 3.0 on DWC2 OTG controller.
  993. */
  994. mdelay(10);
  995. debug("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
  996. dev->descriptor.iManufacturer, dev->descriptor.iProduct,
  997. dev->descriptor.iSerialNumber);
  998. memset(dev->mf, 0, sizeof(dev->mf));
  999. memset(dev->prod, 0, sizeof(dev->prod));
  1000. memset(dev->serial, 0, sizeof(dev->serial));
  1001. if (dev->descriptor.iManufacturer)
  1002. usb_string(dev, dev->descriptor.iManufacturer,
  1003. dev->mf, sizeof(dev->mf));
  1004. if (dev->descriptor.iProduct)
  1005. usb_string(dev, dev->descriptor.iProduct,
  1006. dev->prod, sizeof(dev->prod));
  1007. if (dev->descriptor.iSerialNumber)
  1008. usb_string(dev, dev->descriptor.iSerialNumber,
  1009. dev->serial, sizeof(dev->serial));
  1010. debug("Manufacturer %s\n", dev->mf);
  1011. debug("Product %s\n", dev->prod);
  1012. debug("SerialNumber %s\n", dev->serial);
  1013. return 0;
  1014. }
  1015. int usb_setup_device(struct usb_device *dev, bool do_read,
  1016. struct usb_device *parent)
  1017. {
  1018. int addr;
  1019. int ret;
  1020. /* We still haven't set the Address yet */
  1021. addr = dev->devnum;
  1022. dev->devnum = 0;
  1023. ret = usb_prepare_device(dev, addr, do_read, parent);
  1024. if (ret)
  1025. return ret;
  1026. ret = usb_select_config(dev);
  1027. return ret;
  1028. }
  1029. #if !CONFIG_IS_ENABLED(DM_USB)
  1030. /*
  1031. * By the time we get here, the device has gotten a new device ID
  1032. * and is in the default state. We need to identify the thing and
  1033. * get the ball rolling..
  1034. *
  1035. * Returns 0 for success, != 0 for error.
  1036. */
  1037. int usb_new_device(struct usb_device *dev)
  1038. {
  1039. bool do_read = true;
  1040. int err;
  1041. /*
  1042. * XHCI needs to issue a Address device command to setup
  1043. * proper device context structures, before it can interact
  1044. * with the device. So a get_descriptor will fail before any
  1045. * of that is done for XHCI unlike EHCI.
  1046. */
  1047. #ifdef CONFIG_USB_XHCI_HCD
  1048. do_read = false;
  1049. #endif
  1050. err = usb_setup_device(dev, do_read, dev->parent);
  1051. if (err)
  1052. return err;
  1053. /* Now probe if the device is a hub */
  1054. err = usb_hub_probe(dev, 0);
  1055. if (err < 0)
  1056. return err;
  1057. return 0;
  1058. }
  1059. #endif
  1060. __weak
  1061. int board_usb_init(int index, enum usb_init_type init)
  1062. {
  1063. return 0;
  1064. }
  1065. __weak
  1066. int board_usb_cleanup(int index, enum usb_init_type init)
  1067. {
  1068. return 0;
  1069. }
  1070. bool usb_device_has_child_on_port(struct usb_device *parent, int port)
  1071. {
  1072. #if CONFIG_IS_ENABLED(DM_USB)
  1073. return false;
  1074. #else
  1075. return parent->children[port] != NULL;
  1076. #endif
  1077. }
  1078. #if CONFIG_IS_ENABLED(DM_USB)
  1079. void usb_find_usb2_hub_address_port(struct usb_device *udev,
  1080. uint8_t *hub_address, uint8_t *hub_port)
  1081. {
  1082. struct udevice *parent;
  1083. struct usb_device *uparent, *ttdev;
  1084. /*
  1085. * When called from usb-uclass.c: usb_scan_device() udev->dev points
  1086. * to the parent udevice, not the actual udevice belonging to the
  1087. * udev as the device is not instantiated yet. So when searching
  1088. * for the first usb-2 parent start with udev->dev not
  1089. * udev->dev->parent .
  1090. */
  1091. ttdev = udev;
  1092. parent = udev->dev;
  1093. uparent = dev_get_parent_priv(parent);
  1094. while (uparent->speed != USB_SPEED_HIGH) {
  1095. struct udevice *dev = parent;
  1096. if (device_get_uclass_id(dev->parent) != UCLASS_USB_HUB) {
  1097. printf("Error: Cannot find high speed parent of usb-1 device\n");
  1098. *hub_address = 0;
  1099. *hub_port = 0;
  1100. return;
  1101. }
  1102. ttdev = dev_get_parent_priv(dev);
  1103. parent = dev->parent;
  1104. uparent = dev_get_parent_priv(parent);
  1105. }
  1106. *hub_address = uparent->devnum;
  1107. *hub_port = ttdev->portnr;
  1108. }
  1109. #else
  1110. void usb_find_usb2_hub_address_port(struct usb_device *udev,
  1111. uint8_t *hub_address, uint8_t *hub_port)
  1112. {
  1113. /* Find out the nearest parent which is high speed */
  1114. while (udev->parent->parent != NULL)
  1115. if (udev->parent->speed != USB_SPEED_HIGH) {
  1116. udev = udev->parent;
  1117. } else {
  1118. *hub_address = udev->parent->devnum;
  1119. *hub_port = udev->portnr;
  1120. return;
  1121. }
  1122. printf("Error: Cannot find high speed parent of usb-1 device\n");
  1123. *hub_address = 0;
  1124. *hub_port = 0;
  1125. }
  1126. #endif
  1127. /* EOF */