smc911x.c 6.8 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * SMSC LAN9[12]1[567] Network driver
  4. *
  5. * (c) 2007 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
  6. */
  7. #include <common.h>
  8. #include <command.h>
  9. #include <malloc.h>
  10. #include <net.h>
  11. #include <miiphy.h>
  12. #include "smc911x.h"
  13. u32 pkt_data_pull(struct eth_device *dev, u32 addr) \
  14. __attribute__ ((weak, alias ("smc911x_reg_read")));
  15. void pkt_data_push(struct eth_device *dev, u32 addr, u32 val) \
  16. __attribute__ ((weak, alias ("smc911x_reg_write")));
  17. static void smc911x_handle_mac_address(struct eth_device *dev)
  18. {
  19. unsigned long addrh, addrl;
  20. uchar *m = dev->enetaddr;
  21. addrl = m[0] | (m[1] << 8) | (m[2] << 16) | (m[3] << 24);
  22. addrh = m[4] | (m[5] << 8);
  23. smc911x_set_mac_csr(dev, ADDRL, addrl);
  24. smc911x_set_mac_csr(dev, ADDRH, addrh);
  25. printf(DRIVERNAME ": MAC %pM\n", m);
  26. }
  27. static int smc911x_eth_phy_read(struct eth_device *dev,
  28. u8 phy, u8 reg, u16 *val)
  29. {
  30. while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
  31. ;
  32. smc911x_set_mac_csr(dev, MII_ACC, phy << 11 | reg << 6 |
  33. MII_ACC_MII_BUSY);
  34. while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
  35. ;
  36. *val = smc911x_get_mac_csr(dev, MII_DATA);
  37. return 0;
  38. }
  39. static int smc911x_eth_phy_write(struct eth_device *dev,
  40. u8 phy, u8 reg, u16 val)
  41. {
  42. while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
  43. ;
  44. smc911x_set_mac_csr(dev, MII_DATA, val);
  45. smc911x_set_mac_csr(dev, MII_ACC,
  46. phy << 11 | reg << 6 | MII_ACC_MII_BUSY | MII_ACC_MII_WRITE);
  47. while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
  48. ;
  49. return 0;
  50. }
  51. static int smc911x_phy_reset(struct eth_device *dev)
  52. {
  53. u32 reg;
  54. reg = smc911x_reg_read(dev, PMT_CTRL);
  55. reg &= ~0xfffff030;
  56. reg |= PMT_CTRL_PHY_RST;
  57. smc911x_reg_write(dev, PMT_CTRL, reg);
  58. mdelay(100);
  59. return 0;
  60. }
  61. static void smc911x_phy_configure(struct eth_device *dev)
  62. {
  63. int timeout;
  64. u16 status;
  65. smc911x_phy_reset(dev);
  66. smc911x_eth_phy_write(dev, 1, MII_BMCR, BMCR_RESET);
  67. mdelay(1);
  68. smc911x_eth_phy_write(dev, 1, MII_ADVERTISE, 0x01e1);
  69. smc911x_eth_phy_write(dev, 1, MII_BMCR, BMCR_ANENABLE |
  70. BMCR_ANRESTART);
  71. timeout = 5000;
  72. do {
  73. mdelay(1);
  74. if ((timeout--) == 0)
  75. goto err_out;
  76. if (smc911x_eth_phy_read(dev, 1, MII_BMSR, &status) != 0)
  77. goto err_out;
  78. } while (!(status & BMSR_LSTATUS));
  79. printf(DRIVERNAME ": phy initialized\n");
  80. return;
  81. err_out:
  82. printf(DRIVERNAME ": autonegotiation timed out\n");
  83. }
  84. static void smc911x_enable(struct eth_device *dev)
  85. {
  86. /* Enable TX */
  87. smc911x_reg_write(dev, HW_CFG, 8 << 16 | HW_CFG_SF);
  88. smc911x_reg_write(dev, GPT_CFG, GPT_CFG_TIMER_EN | 10000);
  89. smc911x_reg_write(dev, TX_CFG, TX_CFG_TX_ON);
  90. /* no padding to start of packets */
  91. smc911x_reg_write(dev, RX_CFG, 0);
  92. smc911x_set_mac_csr(dev, MAC_CR, MAC_CR_TXEN | MAC_CR_RXEN |
  93. MAC_CR_HBDIS);
  94. }
  95. static int smc911x_init(struct eth_device *dev, bd_t * bd)
  96. {
  97. struct chip_id *id = dev->priv;
  98. printf(DRIVERNAME ": detected %s controller\n", id->name);
  99. smc911x_reset(dev);
  100. /* Configure the PHY, initialize the link state */
  101. smc911x_phy_configure(dev);
  102. smc911x_handle_mac_address(dev);
  103. /* Turn on Tx + Rx */
  104. smc911x_enable(dev);
  105. return 0;
  106. }
  107. static int smc911x_send(struct eth_device *dev, void *packet, int length)
  108. {
  109. u32 *data = (u32*)packet;
  110. u32 tmplen;
  111. u32 status;
  112. smc911x_reg_write(dev, TX_DATA_FIFO, TX_CMD_A_INT_FIRST_SEG |
  113. TX_CMD_A_INT_LAST_SEG | length);
  114. smc911x_reg_write(dev, TX_DATA_FIFO, length);
  115. tmplen = (length + 3) / 4;
  116. while (tmplen--)
  117. pkt_data_push(dev, TX_DATA_FIFO, *data++);
  118. /* wait for transmission */
  119. while (!((smc911x_reg_read(dev, TX_FIFO_INF) &
  120. TX_FIFO_INF_TSUSED) >> 16));
  121. /* get status. Ignore 'no carrier' error, it has no meaning for
  122. * full duplex operation
  123. */
  124. status = smc911x_reg_read(dev, TX_STATUS_FIFO) &
  125. (TX_STS_LOC | TX_STS_LATE_COLL | TX_STS_MANY_COLL |
  126. TX_STS_MANY_DEFER | TX_STS_UNDERRUN);
  127. if (!status)
  128. return 0;
  129. printf(DRIVERNAME ": failed to send packet: %s%s%s%s%s\n",
  130. status & TX_STS_LOC ? "TX_STS_LOC " : "",
  131. status & TX_STS_LATE_COLL ? "TX_STS_LATE_COLL " : "",
  132. status & TX_STS_MANY_COLL ? "TX_STS_MANY_COLL " : "",
  133. status & TX_STS_MANY_DEFER ? "TX_STS_MANY_DEFER " : "",
  134. status & TX_STS_UNDERRUN ? "TX_STS_UNDERRUN" : "");
  135. return -1;
  136. }
  137. static void smc911x_halt(struct eth_device *dev)
  138. {
  139. smc911x_reset(dev);
  140. smc911x_handle_mac_address(dev);
  141. }
  142. static int smc911x_rx(struct eth_device *dev)
  143. {
  144. u32 *data = (u32 *)net_rx_packets[0];
  145. u32 pktlen, tmplen;
  146. u32 status;
  147. if ((smc911x_reg_read(dev, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED) >> 16) {
  148. status = smc911x_reg_read(dev, RX_STATUS_FIFO);
  149. pktlen = (status & RX_STS_PKT_LEN) >> 16;
  150. smc911x_reg_write(dev, RX_CFG, 0);
  151. tmplen = (pktlen + 3) / 4;
  152. while (tmplen--)
  153. *data++ = pkt_data_pull(dev, RX_DATA_FIFO);
  154. if (status & RX_STS_ES)
  155. printf(DRIVERNAME
  156. ": dropped bad packet. Status: 0x%08x\n",
  157. status);
  158. else
  159. net_process_received_packet(net_rx_packets[0], pktlen);
  160. }
  161. return 0;
  162. }
  163. #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
  164. /* wrapper for smc911x_eth_phy_read */
  165. static int smc911x_miiphy_read(struct mii_dev *bus, int phy, int devad,
  166. int reg)
  167. {
  168. u16 val = 0;
  169. struct eth_device *dev = eth_get_dev_by_name(bus->name);
  170. if (dev) {
  171. int retval = smc911x_eth_phy_read(dev, phy, reg, &val);
  172. if (retval < 0)
  173. return retval;
  174. return val;
  175. }
  176. return -ENODEV;
  177. }
  178. /* wrapper for smc911x_eth_phy_write */
  179. static int smc911x_miiphy_write(struct mii_dev *bus, int phy, int devad,
  180. int reg, u16 val)
  181. {
  182. struct eth_device *dev = eth_get_dev_by_name(bus->name);
  183. if (dev)
  184. return smc911x_eth_phy_write(dev, phy, reg, val);
  185. return -ENODEV;
  186. }
  187. #endif
  188. int smc911x_initialize(u8 dev_num, int base_addr)
  189. {
  190. unsigned long addrl, addrh;
  191. struct eth_device *dev;
  192. dev = malloc(sizeof(*dev));
  193. if (!dev) {
  194. return -1;
  195. }
  196. memset(dev, 0, sizeof(*dev));
  197. dev->iobase = base_addr;
  198. /* Try to detect chip. Will fail if not present. */
  199. if (smc911x_detect_chip(dev)) {
  200. free(dev);
  201. return 0;
  202. }
  203. addrh = smc911x_get_mac_csr(dev, ADDRH);
  204. addrl = smc911x_get_mac_csr(dev, ADDRL);
  205. if (!(addrl == 0xffffffff && addrh == 0x0000ffff)) {
  206. /* address is obtained from optional eeprom */
  207. dev->enetaddr[0] = addrl;
  208. dev->enetaddr[1] = addrl >> 8;
  209. dev->enetaddr[2] = addrl >> 16;
  210. dev->enetaddr[3] = addrl >> 24;
  211. dev->enetaddr[4] = addrh;
  212. dev->enetaddr[5] = addrh >> 8;
  213. }
  214. dev->init = smc911x_init;
  215. dev->halt = smc911x_halt;
  216. dev->send = smc911x_send;
  217. dev->recv = smc911x_rx;
  218. sprintf(dev->name, "%s-%hu", DRIVERNAME, dev_num);
  219. eth_register(dev);
  220. #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
  221. int retval;
  222. struct mii_dev *mdiodev = mdio_alloc();
  223. if (!mdiodev)
  224. return -ENOMEM;
  225. strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
  226. mdiodev->read = smc911x_miiphy_read;
  227. mdiodev->write = smc911x_miiphy_write;
  228. retval = mdio_register(mdiodev);
  229. if (retval < 0)
  230. return retval;
  231. #endif
  232. return 1;
  233. }