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 phy_device *mdio_phydev_for_ethname(const char *ethname)
  140. {
  141. struct list_head *entry;
  142. struct mii_dev *bus;
  143. list_for_each(entry, &mii_devs) {
  144. int i;
  145. bus = list_entry(entry, struct mii_dev, link);
  146. for (i = 0; i < PHY_MAX_ADDR; i++) {
  147. if (!bus->phymap[i] || !bus->phymap[i]->dev)
  148. continue;
  149. if (strcmp(bus->phymap[i]->dev->name, ethname) == 0)
  150. return bus->phymap[i];
  151. }
  152. }
  153. printf("%s is not a known ethernet\n", ethname);
  154. return NULL;
  155. }
  156. const char *miiphy_get_current_dev(void)
  157. {
  158. if (current_mii)
  159. return current_mii->name;
  160. return NULL;
  161. }
  162. static struct mii_dev *miiphy_get_active_dev(const char *devname)
  163. {
  164. /* If the current mii is the one we want, return it */
  165. if (current_mii)
  166. if (strcmp(current_mii->name, devname) == 0)
  167. return current_mii;
  168. /* Otherwise, set the active one to the one we want */
  169. if (miiphy_set_current_dev(devname))
  170. return NULL;
  171. else
  172. return current_mii;
  173. }
  174. /*****************************************************************************
  175. *
  176. * Read to variable <value> from the PHY attached to device <devname>,
  177. * use PHY address <addr> and register <reg>.
  178. *
  179. * This API is deprecated. Use phy_read on a phy_device found via phy_connect
  180. *
  181. * Returns:
  182. * 0 on success
  183. */
  184. int miiphy_read(const char *devname, unsigned char addr, unsigned char reg,
  185. unsigned short *value)
  186. {
  187. struct mii_dev *bus;
  188. int ret;
  189. bus = miiphy_get_active_dev(devname);
  190. if (!bus)
  191. return 1;
  192. ret = bus->read(bus, addr, MDIO_DEVAD_NONE, reg);
  193. if (ret < 0)
  194. return 1;
  195. *value = (unsigned short)ret;
  196. return 0;
  197. }
  198. /*****************************************************************************
  199. *
  200. * Write <value> to the PHY attached to device <devname>,
  201. * use PHY address <addr> and register <reg>.
  202. *
  203. * This API is deprecated. Use phy_write on a phy_device found by phy_connect
  204. *
  205. * Returns:
  206. * 0 on success
  207. */
  208. int miiphy_write(const char *devname, unsigned char addr, unsigned char reg,
  209. unsigned short value)
  210. {
  211. struct mii_dev *bus;
  212. bus = miiphy_get_active_dev(devname);
  213. if (bus)
  214. return bus->write(bus, addr, MDIO_DEVAD_NONE, reg, value);
  215. return 1;
  216. }
  217. /*****************************************************************************
  218. *
  219. * Print out list of registered MII capable devices.
  220. */
  221. void miiphy_listdev(void)
  222. {
  223. struct list_head *entry;
  224. struct mii_dev *dev;
  225. puts("MII devices: ");
  226. list_for_each(entry, &mii_devs) {
  227. dev = list_entry(entry, struct mii_dev, link);
  228. printf("'%s' ", dev->name);
  229. }
  230. puts("\n");
  231. if (current_mii)
  232. printf("Current device: '%s'\n", current_mii->name);
  233. }
  234. /*****************************************************************************
  235. *
  236. * Read the OUI, manufacture's model number, and revision number.
  237. *
  238. * OUI: 22 bits (unsigned int)
  239. * Model: 6 bits (unsigned char)
  240. * Revision: 4 bits (unsigned char)
  241. *
  242. * This API is deprecated.
  243. *
  244. * Returns:
  245. * 0 on success
  246. */
  247. int miiphy_info(const char *devname, unsigned char addr, unsigned int *oui,
  248. unsigned char *model, unsigned char *rev)
  249. {
  250. unsigned int reg = 0;
  251. unsigned short tmp;
  252. if (miiphy_read(devname, addr, MII_PHYSID2, &tmp) != 0) {
  253. debug("PHY ID register 2 read failed\n");
  254. return -1;
  255. }
  256. reg = tmp;
  257. debug("MII_PHYSID2 @ 0x%x = 0x%04x\n", addr, reg);
  258. if (reg == 0xFFFF) {
  259. /* No physical device present at this address */
  260. return -1;
  261. }
  262. if (miiphy_read(devname, addr, MII_PHYSID1, &tmp) != 0) {
  263. debug("PHY ID register 1 read failed\n");
  264. return -1;
  265. }
  266. reg |= tmp << 16;
  267. debug("PHY_PHYIDR[1,2] @ 0x%x = 0x%08x\n", addr, reg);
  268. *oui = (reg >> 10);
  269. *model = (unsigned char)((reg >> 4) & 0x0000003F);
  270. *rev = (unsigned char)(reg & 0x0000000F);
  271. return 0;
  272. }
  273. #ifndef CONFIG_PHYLIB
  274. /*****************************************************************************
  275. *
  276. * Reset the PHY.
  277. *
  278. * This API is deprecated. Use PHYLIB.
  279. *
  280. * Returns:
  281. * 0 on success
  282. */
  283. int miiphy_reset(const char *devname, unsigned char addr)
  284. {
  285. unsigned short reg;
  286. int timeout = 500;
  287. if (miiphy_read(devname, addr, MII_BMCR, &reg) != 0) {
  288. debug("PHY status read failed\n");
  289. return -1;
  290. }
  291. if (miiphy_write(devname, addr, MII_BMCR, reg | BMCR_RESET) != 0) {
  292. debug("PHY reset failed\n");
  293. return -1;
  294. }
  295. #ifdef CONFIG_PHY_RESET_DELAY
  296. udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
  297. #endif
  298. /*
  299. * Poll the control register for the reset bit to go to 0 (it is
  300. * auto-clearing). This should happen within 0.5 seconds per the
  301. * IEEE spec.
  302. */
  303. reg = 0x8000;
  304. while (((reg & 0x8000) != 0) && timeout--) {
  305. if (miiphy_read(devname, addr, MII_BMCR, &reg) != 0) {
  306. debug("PHY status read failed\n");
  307. return -1;
  308. }
  309. udelay(1000);
  310. }
  311. if ((reg & 0x8000) == 0) {
  312. return 0;
  313. } else {
  314. puts("PHY reset timed out\n");
  315. return -1;
  316. }
  317. return 0;
  318. }
  319. #endif /* !PHYLIB */
  320. /*****************************************************************************
  321. *
  322. * Determine the ethernet speed (10/100/1000). Return 10 on error.
  323. */
  324. int miiphy_speed(const char *devname, unsigned char addr)
  325. {
  326. u16 bmcr, anlpar, adv;
  327. #if defined(CONFIG_PHY_GIGE)
  328. u16 btsr;
  329. /*
  330. * Check for 1000BASE-X. If it is supported, then assume that the speed
  331. * is 1000.
  332. */
  333. if (miiphy_is_1000base_x(devname, addr))
  334. return _1000BASET;
  335. /*
  336. * No 1000BASE-X, so assume 1000BASE-T/100BASE-TX/10BASE-T register set.
  337. */
  338. /* Check for 1000BASE-T. */
  339. if (miiphy_read(devname, addr, MII_STAT1000, &btsr)) {
  340. printf("PHY 1000BT status");
  341. goto miiphy_read_failed;
  342. }
  343. if (btsr != 0xFFFF &&
  344. (btsr & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)))
  345. return _1000BASET;
  346. #endif /* CONFIG_PHY_GIGE */
  347. /* Check Basic Management Control Register first. */
  348. if (miiphy_read(devname, addr, MII_BMCR, &bmcr)) {
  349. printf("PHY speed");
  350. goto miiphy_read_failed;
  351. }
  352. /* Check if auto-negotiation is on. */
  353. if (bmcr & BMCR_ANENABLE) {
  354. /* Get auto-negotiation results. */
  355. if (miiphy_read(devname, addr, MII_LPA, &anlpar)) {
  356. printf("PHY AN speed");
  357. goto miiphy_read_failed;
  358. }
  359. if (miiphy_read(devname, addr, MII_ADVERTISE, &adv)) {
  360. puts("PHY AN adv speed");
  361. goto miiphy_read_failed;
  362. }
  363. return ((anlpar & adv) & LPA_100) ? _100BASET : _10BASET;
  364. }
  365. /* Get speed from basic control settings. */
  366. return (bmcr & BMCR_SPEED100) ? _100BASET : _10BASET;
  367. miiphy_read_failed:
  368. printf(" read failed, assuming 10BASE-T\n");
  369. return _10BASET;
  370. }
  371. /*****************************************************************************
  372. *
  373. * Determine full/half duplex. Return half on error.
  374. */
  375. int miiphy_duplex(const char *devname, unsigned char addr)
  376. {
  377. u16 bmcr, anlpar, adv;
  378. #if defined(CONFIG_PHY_GIGE)
  379. u16 btsr;
  380. /* Check for 1000BASE-X. */
  381. if (miiphy_is_1000base_x(devname, addr)) {
  382. /* 1000BASE-X */
  383. if (miiphy_read(devname, addr, MII_LPA, &anlpar)) {
  384. printf("1000BASE-X PHY AN duplex");
  385. goto miiphy_read_failed;
  386. }
  387. }
  388. /*
  389. * No 1000BASE-X, so assume 1000BASE-T/100BASE-TX/10BASE-T register set.
  390. */
  391. /* Check for 1000BASE-T. */
  392. if (miiphy_read(devname, addr, MII_STAT1000, &btsr)) {
  393. printf("PHY 1000BT status");
  394. goto miiphy_read_failed;
  395. }
  396. if (btsr != 0xFFFF) {
  397. if (btsr & PHY_1000BTSR_1000FD) {
  398. return FULL;
  399. } else if (btsr & PHY_1000BTSR_1000HD) {
  400. return HALF;
  401. }
  402. }
  403. #endif /* CONFIG_PHY_GIGE */
  404. /* Check Basic Management Control Register first. */
  405. if (miiphy_read(devname, addr, MII_BMCR, &bmcr)) {
  406. puts("PHY duplex");
  407. goto miiphy_read_failed;
  408. }
  409. /* Check if auto-negotiation is on. */
  410. if (bmcr & BMCR_ANENABLE) {
  411. /* Get auto-negotiation results. */
  412. if (miiphy_read(devname, addr, MII_LPA, &anlpar)) {
  413. puts("PHY AN duplex");
  414. goto miiphy_read_failed;
  415. }
  416. if (miiphy_read(devname, addr, MII_ADVERTISE, &adv)) {
  417. puts("PHY AN adv duplex");
  418. goto miiphy_read_failed;
  419. }
  420. return ((anlpar & adv) & (LPA_10FULL | LPA_100FULL)) ?
  421. FULL : HALF;
  422. }
  423. /* Get speed from basic control settings. */
  424. return (bmcr & BMCR_FULLDPLX) ? FULL : HALF;
  425. miiphy_read_failed:
  426. printf(" read failed, assuming half duplex\n");
  427. return HALF;
  428. }
  429. /*****************************************************************************
  430. *
  431. * Return 1 if PHY supports 1000BASE-X, 0 if PHY supports 10BASE-T/100BASE-TX/
  432. * 1000BASE-T, or on error.
  433. */
  434. int miiphy_is_1000base_x(const char *devname, unsigned char addr)
  435. {
  436. #if defined(CONFIG_PHY_GIGE)
  437. u16 exsr;
  438. if (miiphy_read(devname, addr, MII_ESTATUS, &exsr)) {
  439. printf("PHY extended status read failed, assuming no "
  440. "1000BASE-X\n");
  441. return 0;
  442. }
  443. return 0 != (exsr & (ESTATUS_1000XF | ESTATUS_1000XH));
  444. #else
  445. return 0;
  446. #endif
  447. }
  448. #ifdef CONFIG_SYS_FAULT_ECHO_LINK_DOWN
  449. /*****************************************************************************
  450. *
  451. * Determine link status
  452. */
  453. int miiphy_link(const char *devname, unsigned char addr)
  454. {
  455. unsigned short reg;
  456. /* dummy read; needed to latch some phys */
  457. (void)miiphy_read(devname, addr, MII_BMSR, &reg);
  458. if (miiphy_read(devname, addr, MII_BMSR, &reg)) {
  459. puts("MII_BMSR read failed, assuming no link\n");
  460. return 0;
  461. }
  462. /* Determine if a link is active */
  463. if ((reg & BMSR_LSTATUS) != 0) {
  464. return 1;
  465. } else {
  466. return 0;
  467. }
  468. }
  469. #endif