miiphyutil.c 12 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * (C) Copyright 2001
  4. * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com.
  5. */
  6. /*
  7. * This provides a bit-banged interface to the ethernet MII management
  8. * channel.
  9. */
  10. #include <common.h>
  11. #include <dm.h>
  12. #include <miiphy.h>
  13. #include <phy.h>
  14. #include <asm/types.h>
  15. #include <linux/list.h>
  16. #include <malloc.h>
  17. #include <net.h>
  18. /* local debug macro */
  19. #undef MII_DEBUG
  20. #undef debug
  21. #ifdef MII_DEBUG
  22. #define debug(fmt, args...) printf(fmt, ##args)
  23. #else
  24. #define debug(fmt, args...)
  25. #endif /* MII_DEBUG */
  26. static struct list_head mii_devs;
  27. static struct mii_dev *current_mii;
  28. /*
  29. * Lookup the mii_dev struct by the registered device name.
  30. */
  31. struct mii_dev *miiphy_get_dev_by_name(const char *devname)
  32. {
  33. struct list_head *entry;
  34. struct mii_dev *dev;
  35. if (!devname) {
  36. printf("NULL device name!\n");
  37. return NULL;
  38. }
  39. list_for_each(entry, &mii_devs) {
  40. dev = list_entry(entry, struct mii_dev, link);
  41. if (strcmp(dev->name, devname) == 0)
  42. return dev;
  43. }
  44. return NULL;
  45. }
  46. /*****************************************************************************
  47. *
  48. * Initialize global data. Need to be called before any other miiphy routine.
  49. */
  50. void miiphy_init(void)
  51. {
  52. INIT_LIST_HEAD(&mii_devs);
  53. current_mii = NULL;
  54. }
  55. struct mii_dev *mdio_alloc(void)
  56. {
  57. struct mii_dev *bus;
  58. bus = malloc(sizeof(*bus));
  59. if (!bus)
  60. return bus;
  61. memset(bus, 0, sizeof(*bus));
  62. /* initalize mii_dev struct fields */
  63. INIT_LIST_HEAD(&bus->link);
  64. return bus;
  65. }
  66. void mdio_free(struct mii_dev *bus)
  67. {
  68. free(bus);
  69. }
  70. int mdio_register(struct mii_dev *bus)
  71. {
  72. if (!bus || !bus->read || !bus->write)
  73. return -1;
  74. /* check if we have unique name */
  75. if (miiphy_get_dev_by_name(bus->name)) {
  76. printf("mdio_register: non unique device name '%s'\n",
  77. bus->name);
  78. return -1;
  79. }
  80. /* add it to the list */
  81. list_add_tail(&bus->link, &mii_devs);
  82. if (!current_mii)
  83. current_mii = bus;
  84. return 0;
  85. }
  86. int mdio_register_seq(struct mii_dev *bus, int seq)
  87. {
  88. int ret;
  89. /* Setup a unique name for each mdio bus */
  90. ret = snprintf(bus->name, MDIO_NAME_LEN, "eth%d", seq);
  91. if (ret < 0)
  92. return ret;
  93. return mdio_register(bus);
  94. }
  95. int mdio_unregister(struct mii_dev *bus)
  96. {
  97. if (!bus)
  98. return 0;
  99. /* delete it from the list */
  100. list_del(&bus->link);
  101. if (current_mii == bus)
  102. current_mii = NULL;
  103. return 0;
  104. }
  105. void mdio_list_devices(void)
  106. {
  107. struct list_head *entry;
  108. list_for_each(entry, &mii_devs) {
  109. int i;
  110. struct mii_dev *bus = list_entry(entry, struct mii_dev, link);
  111. printf("%s:\n", bus->name);
  112. for (i = 0; i < PHY_MAX_ADDR; i++) {
  113. struct phy_device *phydev = bus->phymap[i];
  114. if (phydev) {
  115. printf("%x - %s", i, phydev->drv->name);
  116. if (phydev->dev)
  117. printf(" <--> %s\n", phydev->dev->name);
  118. else
  119. printf("\n");
  120. }
  121. }
  122. }
  123. }
  124. int miiphy_set_current_dev(const char *devname)
  125. {
  126. struct mii_dev *dev;
  127. dev = miiphy_get_dev_by_name(devname);
  128. if (dev) {
  129. current_mii = dev;
  130. return 0;
  131. }
  132. printf("No such device: %s\n", devname);
  133. return 1;
  134. }
  135. struct mii_dev *mdio_get_current_dev(void)
  136. {
  137. return current_mii;
  138. }
  139. struct list_head *mdio_get_list_head(void)
  140. {
  141. return &mii_devs;
  142. }
  143. struct phy_device *mdio_phydev_for_ethname(const char *ethname)
  144. {
  145. struct list_head *entry;
  146. struct mii_dev *bus;
  147. list_for_each(entry, &mii_devs) {
  148. int i;
  149. bus = list_entry(entry, struct mii_dev, link);
  150. for (i = 0; i < PHY_MAX_ADDR; i++) {
  151. if (!bus->phymap[i] || !bus->phymap[i]->dev)
  152. continue;
  153. if (strcmp(bus->phymap[i]->dev->name, ethname) == 0)
  154. return bus->phymap[i];
  155. }
  156. }
  157. printf("%s is not a known ethernet\n", ethname);
  158. return NULL;
  159. }
  160. const char *miiphy_get_current_dev(void)
  161. {
  162. if (current_mii)
  163. return current_mii->name;
  164. return NULL;
  165. }
  166. static struct mii_dev *miiphy_get_active_dev(const char *devname)
  167. {
  168. /* If the current mii is the one we want, return it */
  169. if (current_mii)
  170. if (strcmp(current_mii->name, devname) == 0)
  171. return current_mii;
  172. /* Otherwise, set the active one to the one we want */
  173. if (miiphy_set_current_dev(devname))
  174. return NULL;
  175. else
  176. return current_mii;
  177. }
  178. /*****************************************************************************
  179. *
  180. * Read to variable <value> from the PHY attached to device <devname>,
  181. * use PHY address <addr> and register <reg>.
  182. *
  183. * This API is deprecated. Use phy_read on a phy_device found via phy_connect
  184. *
  185. * Returns:
  186. * 0 on success
  187. */
  188. int miiphy_read(const char *devname, unsigned char addr, unsigned char reg,
  189. unsigned short *value)
  190. {
  191. struct mii_dev *bus;
  192. int ret;
  193. bus = miiphy_get_active_dev(devname);
  194. if (!bus)
  195. return 1;
  196. ret = bus->read(bus, addr, MDIO_DEVAD_NONE, reg);
  197. if (ret < 0)
  198. return 1;
  199. *value = (unsigned short)ret;
  200. return 0;
  201. }
  202. /*****************************************************************************
  203. *
  204. * Write <value> to the PHY attached to device <devname>,
  205. * use PHY address <addr> and register <reg>.
  206. *
  207. * This API is deprecated. Use phy_write on a phy_device found by phy_connect
  208. *
  209. * Returns:
  210. * 0 on success
  211. */
  212. int miiphy_write(const char *devname, unsigned char addr, unsigned char reg,
  213. unsigned short value)
  214. {
  215. struct mii_dev *bus;
  216. bus = miiphy_get_active_dev(devname);
  217. if (bus)
  218. return bus->write(bus, addr, MDIO_DEVAD_NONE, reg, value);
  219. return 1;
  220. }
  221. /*****************************************************************************
  222. *
  223. * Print out list of registered MII capable devices.
  224. */
  225. void miiphy_listdev(void)
  226. {
  227. struct list_head *entry;
  228. struct mii_dev *dev;
  229. puts("MII devices: ");
  230. list_for_each(entry, &mii_devs) {
  231. dev = list_entry(entry, struct mii_dev, link);
  232. printf("'%s' ", dev->name);
  233. }
  234. puts("\n");
  235. if (current_mii)
  236. printf("Current device: '%s'\n", current_mii->name);
  237. }
  238. /*****************************************************************************
  239. *
  240. * Read the OUI, manufacture's model number, and revision number.
  241. *
  242. * OUI: 22 bits (unsigned int)
  243. * Model: 6 bits (unsigned char)
  244. * Revision: 4 bits (unsigned char)
  245. *
  246. * This API is deprecated.
  247. *
  248. * Returns:
  249. * 0 on success
  250. */
  251. int miiphy_info(const char *devname, unsigned char addr, unsigned int *oui,
  252. unsigned char *model, unsigned char *rev)
  253. {
  254. unsigned int reg = 0;
  255. unsigned short tmp;
  256. if (miiphy_read(devname, addr, MII_PHYSID2, &tmp) != 0) {
  257. debug("PHY ID register 2 read failed\n");
  258. return -1;
  259. }
  260. reg = tmp;
  261. debug("MII_PHYSID2 @ 0x%x = 0x%04x\n", addr, reg);
  262. if (reg == 0xFFFF) {
  263. /* No physical device present at this address */
  264. return -1;
  265. }
  266. if (miiphy_read(devname, addr, MII_PHYSID1, &tmp) != 0) {
  267. debug("PHY ID register 1 read failed\n");
  268. return -1;
  269. }
  270. reg |= tmp << 16;
  271. debug("PHY_PHYIDR[1,2] @ 0x%x = 0x%08x\n", addr, reg);
  272. *oui = (reg >> 10);
  273. *model = (unsigned char)((reg >> 4) & 0x0000003F);
  274. *rev = (unsigned char)(reg & 0x0000000F);
  275. return 0;
  276. }
  277. #ifndef CONFIG_PHYLIB
  278. /*****************************************************************************
  279. *
  280. * Reset the PHY.
  281. *
  282. * This API is deprecated. Use PHYLIB.
  283. *
  284. * Returns:
  285. * 0 on success
  286. */
  287. int miiphy_reset(const char *devname, unsigned char addr)
  288. {
  289. unsigned short reg;
  290. int timeout = 500;
  291. if (miiphy_read(devname, addr, MII_BMCR, &reg) != 0) {
  292. debug("PHY status read failed\n");
  293. return -1;
  294. }
  295. if (miiphy_write(devname, addr, MII_BMCR, reg | BMCR_RESET) != 0) {
  296. debug("PHY reset failed\n");
  297. return -1;
  298. }
  299. #ifdef CONFIG_PHY_RESET_DELAY
  300. udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
  301. #endif
  302. /*
  303. * Poll the control register for the reset bit to go to 0 (it is
  304. * auto-clearing). This should happen within 0.5 seconds per the
  305. * IEEE spec.
  306. */
  307. reg = 0x8000;
  308. while (((reg & 0x8000) != 0) && timeout--) {
  309. if (miiphy_read(devname, addr, MII_BMCR, &reg) != 0) {
  310. debug("PHY status read failed\n");
  311. return -1;
  312. }
  313. udelay(1000);
  314. }
  315. if ((reg & 0x8000) == 0) {
  316. return 0;
  317. } else {
  318. puts("PHY reset timed out\n");
  319. return -1;
  320. }
  321. return 0;
  322. }
  323. #endif /* !PHYLIB */
  324. /*****************************************************************************
  325. *
  326. * Determine the ethernet speed (10/100/1000). Return 10 on error.
  327. */
  328. int miiphy_speed(const char *devname, unsigned char addr)
  329. {
  330. u16 bmcr, anlpar, adv;
  331. #if defined(CONFIG_PHY_GIGE)
  332. u16 btsr;
  333. /*
  334. * Check for 1000BASE-X. If it is supported, then assume that the speed
  335. * is 1000.
  336. */
  337. if (miiphy_is_1000base_x(devname, addr))
  338. return _1000BASET;
  339. /*
  340. * No 1000BASE-X, so assume 1000BASE-T/100BASE-TX/10BASE-T register set.
  341. */
  342. /* Check for 1000BASE-T. */
  343. if (miiphy_read(devname, addr, MII_STAT1000, &btsr)) {
  344. printf("PHY 1000BT status");
  345. goto miiphy_read_failed;
  346. }
  347. if (btsr != 0xFFFF &&
  348. (btsr & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)))
  349. return _1000BASET;
  350. #endif /* CONFIG_PHY_GIGE */
  351. /* Check Basic Management Control Register first. */
  352. if (miiphy_read(devname, addr, MII_BMCR, &bmcr)) {
  353. printf("PHY speed");
  354. goto miiphy_read_failed;
  355. }
  356. /* Check if auto-negotiation is on. */
  357. if (bmcr & BMCR_ANENABLE) {
  358. /* Get auto-negotiation results. */
  359. if (miiphy_read(devname, addr, MII_LPA, &anlpar)) {
  360. printf("PHY AN speed");
  361. goto miiphy_read_failed;
  362. }
  363. if (miiphy_read(devname, addr, MII_ADVERTISE, &adv)) {
  364. puts("PHY AN adv speed");
  365. goto miiphy_read_failed;
  366. }
  367. return ((anlpar & adv) & LPA_100) ? _100BASET : _10BASET;
  368. }
  369. /* Get speed from basic control settings. */
  370. return (bmcr & BMCR_SPEED100) ? _100BASET : _10BASET;
  371. miiphy_read_failed:
  372. printf(" read failed, assuming 10BASE-T\n");
  373. return _10BASET;
  374. }
  375. /*****************************************************************************
  376. *
  377. * Determine full/half duplex. Return half on error.
  378. */
  379. int miiphy_duplex(const char *devname, unsigned char addr)
  380. {
  381. u16 bmcr, anlpar, adv;
  382. #if defined(CONFIG_PHY_GIGE)
  383. u16 btsr;
  384. /* Check for 1000BASE-X. */
  385. if (miiphy_is_1000base_x(devname, addr)) {
  386. /* 1000BASE-X */
  387. if (miiphy_read(devname, addr, MII_LPA, &anlpar)) {
  388. printf("1000BASE-X PHY AN duplex");
  389. goto miiphy_read_failed;
  390. }
  391. }
  392. /*
  393. * No 1000BASE-X, so assume 1000BASE-T/100BASE-TX/10BASE-T register set.
  394. */
  395. /* Check for 1000BASE-T. */
  396. if (miiphy_read(devname, addr, MII_STAT1000, &btsr)) {
  397. printf("PHY 1000BT status");
  398. goto miiphy_read_failed;
  399. }
  400. if (btsr != 0xFFFF) {
  401. if (btsr & PHY_1000BTSR_1000FD) {
  402. return FULL;
  403. } else if (btsr & PHY_1000BTSR_1000HD) {
  404. return HALF;
  405. }
  406. }
  407. #endif /* CONFIG_PHY_GIGE */
  408. /* Check Basic Management Control Register first. */
  409. if (miiphy_read(devname, addr, MII_BMCR, &bmcr)) {
  410. puts("PHY duplex");
  411. goto miiphy_read_failed;
  412. }
  413. /* Check if auto-negotiation is on. */
  414. if (bmcr & BMCR_ANENABLE) {
  415. /* Get auto-negotiation results. */
  416. if (miiphy_read(devname, addr, MII_LPA, &anlpar)) {
  417. puts("PHY AN duplex");
  418. goto miiphy_read_failed;
  419. }
  420. if (miiphy_read(devname, addr, MII_ADVERTISE, &adv)) {
  421. puts("PHY AN adv duplex");
  422. goto miiphy_read_failed;
  423. }
  424. return ((anlpar & adv) & (LPA_10FULL | LPA_100FULL)) ?
  425. FULL : HALF;
  426. }
  427. /* Get speed from basic control settings. */
  428. return (bmcr & BMCR_FULLDPLX) ? FULL : HALF;
  429. miiphy_read_failed:
  430. printf(" read failed, assuming half duplex\n");
  431. return HALF;
  432. }
  433. /*****************************************************************************
  434. *
  435. * Return 1 if PHY supports 1000BASE-X, 0 if PHY supports 10BASE-T/100BASE-TX/
  436. * 1000BASE-T, or on error.
  437. */
  438. int miiphy_is_1000base_x(const char *devname, unsigned char addr)
  439. {
  440. #if defined(CONFIG_PHY_GIGE)
  441. u16 exsr;
  442. if (miiphy_read(devname, addr, MII_ESTATUS, &exsr)) {
  443. printf("PHY extended status read failed, assuming no "
  444. "1000BASE-X\n");
  445. return 0;
  446. }
  447. return 0 != (exsr & (ESTATUS_1000XF | ESTATUS_1000XH));
  448. #else
  449. return 0;
  450. #endif
  451. }
  452. #ifdef CONFIG_SYS_FAULT_ECHO_LINK_DOWN
  453. /*****************************************************************************
  454. *
  455. * Determine link status
  456. */
  457. int miiphy_link(const char *devname, unsigned char addr)
  458. {
  459. unsigned short reg;
  460. /* dummy read; needed to latch some phys */
  461. (void)miiphy_read(devname, addr, MII_BMSR, &reg);
  462. if (miiphy_read(devname, addr, MII_BMSR, &reg)) {
  463. puts("MII_BMSR read failed, assuming no link\n");
  464. return 0;
  465. }
  466. /* Determine if a link is active */
  467. if ((reg & BMSR_LSTATUS) != 0) {
  468. return 1;
  469. } else {
  470. return 0;
  471. }
  472. }
  473. #endif