broadcom.c 7.5 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270
  1. /*
  2. * drivers/net/phy/broadcom.c
  3. *
  4. * Broadcom BCM5411, BCM5421 and BCM5461 Gigabit Ethernet
  5. * transceivers.
  6. *
  7. * Copyright (c) 2006 Maciej W. Rozycki
  8. *
  9. * Inspired by code written by Amy Fong.
  10. *
  11. * This program is free software; you can redistribute it and/or
  12. * modify it under the terms of the GNU General Public License
  13. * as published by the Free Software Foundation; either version
  14. * 2 of the License, or (at your option) any later version.
  15. */
  16. #include <linux/module.h>
  17. #include <linux/phy.h>
  18. #define MII_BCM54XX_ECR 0x10 /* BCM54xx extended control register */
  19. #define MII_BCM54XX_ECR_IM 0x1000 /* Interrupt mask */
  20. #define MII_BCM54XX_ECR_IF 0x0800 /* Interrupt force */
  21. #define MII_BCM54XX_ESR 0x11 /* BCM54xx extended status register */
  22. #define MII_BCM54XX_ESR_IS 0x1000 /* Interrupt status */
  23. #define MII_BCM54XX_ISR 0x1a /* BCM54xx interrupt status register */
  24. #define MII_BCM54XX_IMR 0x1b /* BCM54xx interrupt mask register */
  25. #define MII_BCM54XX_INT_CRCERR 0x0001 /* CRC error */
  26. #define MII_BCM54XX_INT_LINK 0x0002 /* Link status changed */
  27. #define MII_BCM54XX_INT_SPEED 0x0004 /* Link speed change */
  28. #define MII_BCM54XX_INT_DUPLEX 0x0008 /* Duplex mode changed */
  29. #define MII_BCM54XX_INT_LRS 0x0010 /* Local receiver status changed */
  30. #define MII_BCM54XX_INT_RRS 0x0020 /* Remote receiver status changed */
  31. #define MII_BCM54XX_INT_SSERR 0x0040 /* Scrambler synchronization error */
  32. #define MII_BCM54XX_INT_UHCD 0x0080 /* Unsupported HCD negotiated */
  33. #define MII_BCM54XX_INT_NHCD 0x0100 /* No HCD */
  34. #define MII_BCM54XX_INT_NHCDL 0x0200 /* No HCD link */
  35. #define MII_BCM54XX_INT_ANPR 0x0400 /* Auto-negotiation page received */
  36. #define MII_BCM54XX_INT_LC 0x0800 /* All counters below 128 */
  37. #define MII_BCM54XX_INT_HC 0x1000 /* Counter above 32768 */
  38. #define MII_BCM54XX_INT_MDIX 0x2000 /* MDIX status change */
  39. #define MII_BCM54XX_INT_PSERR 0x4000 /* Pair swap error */
  40. MODULE_DESCRIPTION("Broadcom PHY driver");
  41. MODULE_AUTHOR("Maciej W. Rozycki");
  42. MODULE_LICENSE("GPL");
  43. static int bcm54xx_config_init(struct phy_device *phydev)
  44. {
  45. int reg, err;
  46. reg = phy_read(phydev, MII_BCM54XX_ECR);
  47. if (reg < 0)
  48. return reg;
  49. /* Mask interrupts globally. */
  50. reg |= MII_BCM54XX_ECR_IM;
  51. err = phy_write(phydev, MII_BCM54XX_ECR, reg);
  52. if (err < 0)
  53. return err;
  54. /* Unmask events we are interested in. */
  55. reg = ~(MII_BCM54XX_INT_DUPLEX |
  56. MII_BCM54XX_INT_SPEED |
  57. MII_BCM54XX_INT_LINK);
  58. err = phy_write(phydev, MII_BCM54XX_IMR, reg);
  59. if (err < 0)
  60. return err;
  61. return 0;
  62. }
  63. static int bcm54xx_ack_interrupt(struct phy_device *phydev)
  64. {
  65. int reg;
  66. /* Clear pending interrupts. */
  67. reg = phy_read(phydev, MII_BCM54XX_ISR);
  68. if (reg < 0)
  69. return reg;
  70. return 0;
  71. }
  72. static int bcm54xx_config_intr(struct phy_device *phydev)
  73. {
  74. int reg, err;
  75. reg = phy_read(phydev, MII_BCM54XX_ECR);
  76. if (reg < 0)
  77. return reg;
  78. if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
  79. reg &= ~MII_BCM54XX_ECR_IM;
  80. else
  81. reg |= MII_BCM54XX_ECR_IM;
  82. err = phy_write(phydev, MII_BCM54XX_ECR, reg);
  83. return err;
  84. }
  85. static int bcm5481_config_aneg(struct phy_device *phydev)
  86. {
  87. int ret;
  88. /* Aneg firsly. */
  89. ret = genphy_config_aneg(phydev);
  90. /* Then we can set up the delay. */
  91. if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) {
  92. u16 reg;
  93. /*
  94. * There is no BCM5481 specification available, so down
  95. * here is everything we know about "register 0x18". This
  96. * at least helps BCM5481 to successfuly receive packets
  97. * on MPC8360E-RDK board. Peter Barada <peterb@logicpd.com>
  98. * says: "This sets delay between the RXD and RXC signals
  99. * instead of using trace lengths to achieve timing".
  100. */
  101. /* Set RDX clk delay. */
  102. reg = 0x7 | (0x7 << 12);
  103. phy_write(phydev, 0x18, reg);
  104. reg = phy_read(phydev, 0x18);
  105. /* Set RDX-RXC skew. */
  106. reg |= (1 << 8);
  107. /* Write bits 14:0. */
  108. reg |= (1 << 15);
  109. phy_write(phydev, 0x18, reg);
  110. }
  111. return ret;
  112. }
  113. static struct phy_driver bcm5411_driver = {
  114. .phy_id = 0x00206070,
  115. .phy_id_mask = 0xfffffff0,
  116. .name = "Broadcom BCM5411",
  117. .features = PHY_GBIT_FEATURES,
  118. .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
  119. .config_init = bcm54xx_config_init,
  120. .config_aneg = genphy_config_aneg,
  121. .read_status = genphy_read_status,
  122. .ack_interrupt = bcm54xx_ack_interrupt,
  123. .config_intr = bcm54xx_config_intr,
  124. .driver = { .owner = THIS_MODULE },
  125. };
  126. static struct phy_driver bcm5421_driver = {
  127. .phy_id = 0x002060e0,
  128. .phy_id_mask = 0xfffffff0,
  129. .name = "Broadcom BCM5421",
  130. .features = PHY_GBIT_FEATURES,
  131. .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
  132. .config_init = bcm54xx_config_init,
  133. .config_aneg = genphy_config_aneg,
  134. .read_status = genphy_read_status,
  135. .ack_interrupt = bcm54xx_ack_interrupt,
  136. .config_intr = bcm54xx_config_intr,
  137. .driver = { .owner = THIS_MODULE },
  138. };
  139. static struct phy_driver bcm5461_driver = {
  140. .phy_id = 0x002060c0,
  141. .phy_id_mask = 0xfffffff0,
  142. .name = "Broadcom BCM5461",
  143. .features = PHY_GBIT_FEATURES,
  144. .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
  145. .config_init = bcm54xx_config_init,
  146. .config_aneg = genphy_config_aneg,
  147. .read_status = genphy_read_status,
  148. .ack_interrupt = bcm54xx_ack_interrupt,
  149. .config_intr = bcm54xx_config_intr,
  150. .driver = { .owner = THIS_MODULE },
  151. };
  152. static struct phy_driver bcm5464_driver = {
  153. .phy_id = 0x002060b0,
  154. .phy_id_mask = 0xfffffff0,
  155. .name = "Broadcom BCM5464",
  156. .features = PHY_GBIT_FEATURES,
  157. .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
  158. .config_init = bcm54xx_config_init,
  159. .config_aneg = genphy_config_aneg,
  160. .read_status = genphy_read_status,
  161. .ack_interrupt = bcm54xx_ack_interrupt,
  162. .config_intr = bcm54xx_config_intr,
  163. .driver = { .owner = THIS_MODULE },
  164. };
  165. static struct phy_driver bcm5481_driver = {
  166. .phy_id = 0x0143bca0,
  167. .phy_id_mask = 0xfffffff0,
  168. .name = "Broadcom BCM5481",
  169. .features = PHY_GBIT_FEATURES,
  170. .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
  171. .config_init = bcm54xx_config_init,
  172. .config_aneg = bcm5481_config_aneg,
  173. .read_status = genphy_read_status,
  174. .ack_interrupt = bcm54xx_ack_interrupt,
  175. .config_intr = bcm54xx_config_intr,
  176. .driver = { .owner = THIS_MODULE },
  177. };
  178. static struct phy_driver bcm5482_driver = {
  179. .phy_id = 0x0143bcb0,
  180. .phy_id_mask = 0xfffffff0,
  181. .name = "Broadcom BCM5482",
  182. .features = PHY_GBIT_FEATURES,
  183. .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
  184. .config_init = bcm54xx_config_init,
  185. .config_aneg = genphy_config_aneg,
  186. .read_status = genphy_read_status,
  187. .ack_interrupt = bcm54xx_ack_interrupt,
  188. .config_intr = bcm54xx_config_intr,
  189. .driver = { .owner = THIS_MODULE },
  190. };
  191. static int __init broadcom_init(void)
  192. {
  193. int ret;
  194. ret = phy_driver_register(&bcm5411_driver);
  195. if (ret)
  196. goto out_5411;
  197. ret = phy_driver_register(&bcm5421_driver);
  198. if (ret)
  199. goto out_5421;
  200. ret = phy_driver_register(&bcm5461_driver);
  201. if (ret)
  202. goto out_5461;
  203. ret = phy_driver_register(&bcm5464_driver);
  204. if (ret)
  205. goto out_5464;
  206. ret = phy_driver_register(&bcm5481_driver);
  207. if (ret)
  208. goto out_5481;
  209. ret = phy_driver_register(&bcm5482_driver);
  210. if (ret)
  211. goto out_5482;
  212. return ret;
  213. out_5482:
  214. phy_driver_unregister(&bcm5481_driver);
  215. out_5481:
  216. phy_driver_unregister(&bcm5464_driver);
  217. out_5464:
  218. phy_driver_unregister(&bcm5461_driver);
  219. out_5461:
  220. phy_driver_unregister(&bcm5421_driver);
  221. out_5421:
  222. phy_driver_unregister(&bcm5411_driver);
  223. out_5411:
  224. return ret;
  225. }
  226. static void __exit broadcom_exit(void)
  227. {
  228. phy_driver_unregister(&bcm5482_driver);
  229. phy_driver_unregister(&bcm5481_driver);
  230. phy_driver_unregister(&bcm5464_driver);
  231. phy_driver_unregister(&bcm5461_driver);
  232. phy_driver_unregister(&bcm5421_driver);
  233. phy_driver_unregister(&bcm5411_driver);
  234. }
  235. module_init(broadcom_init);
  236. module_exit(broadcom_exit);