fec_mpc52xx.c 29 KB

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  1. /*
  2. * Driver for the MPC5200 Fast Ethernet Controller
  3. *
  4. * Originally written by Dale Farnsworth <dfarnsworth@mvista.com> and
  5. * now maintained by Sylvain Munaut <tnt@246tNt.com>
  6. *
  7. * Copyright (C) 2007 Domen Puncer, Telargo, Inc.
  8. * Copyright (C) 2007 Sylvain Munaut <tnt@246tNt.com>
  9. * Copyright (C) 2003-2004 MontaVista, Software, Inc.
  10. *
  11. * This file is licensed under the terms of the GNU General Public License
  12. * version 2. This program is licensed "as is" without any warranty of any
  13. * kind, whether express or implied.
  14. *
  15. */
  16. #include <linux/module.h>
  17. #include <linux/kernel.h>
  18. #include <linux/types.h>
  19. #include <linux/spinlock.h>
  20. #include <linux/errno.h>
  21. #include <linux/init.h>
  22. #include <linux/crc32.h>
  23. #include <linux/hardirq.h>
  24. #include <linux/delay.h>
  25. #include <linux/of_device.h>
  26. #include <linux/of_mdio.h>
  27. #include <linux/of_platform.h>
  28. #include <linux/netdevice.h>
  29. #include <linux/etherdevice.h>
  30. #include <linux/ethtool.h>
  31. #include <linux/skbuff.h>
  32. #include <asm/io.h>
  33. #include <asm/delay.h>
  34. #include <asm/mpc52xx.h>
  35. #include <sysdev/bestcomm/bestcomm.h>
  36. #include <sysdev/bestcomm/fec.h>
  37. #include "fec_mpc52xx.h"
  38. #define DRIVER_NAME "mpc52xx-fec"
  39. /* Private driver data structure */
  40. struct mpc52xx_fec_priv {
  41. struct net_device *ndev;
  42. int duplex;
  43. int speed;
  44. int r_irq;
  45. int t_irq;
  46. struct mpc52xx_fec __iomem *fec;
  47. struct bcom_task *rx_dmatsk;
  48. struct bcom_task *tx_dmatsk;
  49. spinlock_t lock;
  50. int msg_enable;
  51. /* MDIO link details */
  52. unsigned int mdio_speed;
  53. struct device_node *phy_node;
  54. struct phy_device *phydev;
  55. enum phy_state link;
  56. int seven_wire_mode;
  57. };
  58. static irqreturn_t mpc52xx_fec_interrupt(int, void *);
  59. static irqreturn_t mpc52xx_fec_rx_interrupt(int, void *);
  60. static irqreturn_t mpc52xx_fec_tx_interrupt(int, void *);
  61. static void mpc52xx_fec_stop(struct net_device *dev);
  62. static void mpc52xx_fec_start(struct net_device *dev);
  63. static void mpc52xx_fec_reset(struct net_device *dev);
  64. static u8 mpc52xx_fec_mac_addr[6];
  65. module_param_array_named(mac, mpc52xx_fec_mac_addr, byte, NULL, 0);
  66. MODULE_PARM_DESC(mac, "six hex digits, ie. 0x1,0x2,0xc0,0x01,0xba,0xbe");
  67. #define MPC52xx_MESSAGES_DEFAULT ( NETIF_MSG_DRV | NETIF_MSG_PROBE | \
  68. NETIF_MSG_LINK | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP)
  69. static int debug = -1; /* the above default */
  70. module_param(debug, int, 0);
  71. MODULE_PARM_DESC(debug, "debugging messages level");
  72. static void mpc52xx_fec_tx_timeout(struct net_device *dev)
  73. {
  74. struct mpc52xx_fec_priv *priv = netdev_priv(dev);
  75. unsigned long flags;
  76. dev_warn(&dev->dev, "transmit timed out\n");
  77. spin_lock_irqsave(&priv->lock, flags);
  78. mpc52xx_fec_reset(dev);
  79. dev->stats.tx_errors++;
  80. spin_unlock_irqrestore(&priv->lock, flags);
  81. netif_wake_queue(dev);
  82. }
  83. static void mpc52xx_fec_set_paddr(struct net_device *dev, u8 *mac)
  84. {
  85. struct mpc52xx_fec_priv *priv = netdev_priv(dev);
  86. struct mpc52xx_fec __iomem *fec = priv->fec;
  87. out_be32(&fec->paddr1, *(u32 *)(&mac[0]));
  88. out_be32(&fec->paddr2, (*(u16 *)(&mac[4]) << 16) | FEC_PADDR2_TYPE);
  89. }
  90. static void mpc52xx_fec_get_paddr(struct net_device *dev, u8 *mac)
  91. {
  92. struct mpc52xx_fec_priv *priv = netdev_priv(dev);
  93. struct mpc52xx_fec __iomem *fec = priv->fec;
  94. *(u32 *)(&mac[0]) = in_be32(&fec->paddr1);
  95. *(u16 *)(&mac[4]) = in_be32(&fec->paddr2) >> 16;
  96. }
  97. static int mpc52xx_fec_set_mac_address(struct net_device *dev, void *addr)
  98. {
  99. struct sockaddr *sock = addr;
  100. memcpy(dev->dev_addr, sock->sa_data, dev->addr_len);
  101. mpc52xx_fec_set_paddr(dev, sock->sa_data);
  102. return 0;
  103. }
  104. static void mpc52xx_fec_free_rx_buffers(struct net_device *dev, struct bcom_task *s)
  105. {
  106. while (!bcom_queue_empty(s)) {
  107. struct bcom_fec_bd *bd;
  108. struct sk_buff *skb;
  109. skb = bcom_retrieve_buffer(s, NULL, (struct bcom_bd **)&bd);
  110. dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len,
  111. DMA_FROM_DEVICE);
  112. kfree_skb(skb);
  113. }
  114. }
  115. static void
  116. mpc52xx_fec_rx_submit(struct net_device *dev, struct sk_buff *rskb)
  117. {
  118. struct mpc52xx_fec_priv *priv = netdev_priv(dev);
  119. struct bcom_fec_bd *bd;
  120. bd = (struct bcom_fec_bd *) bcom_prepare_next_buffer(priv->rx_dmatsk);
  121. bd->status = FEC_RX_BUFFER_SIZE;
  122. bd->skb_pa = dma_map_single(dev->dev.parent, rskb->data,
  123. FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
  124. bcom_submit_next_buffer(priv->rx_dmatsk, rskb);
  125. }
  126. static int mpc52xx_fec_alloc_rx_buffers(struct net_device *dev, struct bcom_task *rxtsk)
  127. {
  128. struct sk_buff *skb;
  129. while (!bcom_queue_full(rxtsk)) {
  130. skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
  131. if (!skb)
  132. return -EAGAIN;
  133. /* zero out the initial receive buffers to aid debugging */
  134. memset(skb->data, 0, FEC_RX_BUFFER_SIZE);
  135. mpc52xx_fec_rx_submit(dev, skb);
  136. }
  137. return 0;
  138. }
  139. /* based on generic_adjust_link from fs_enet-main.c */
  140. static void mpc52xx_fec_adjust_link(struct net_device *dev)
  141. {
  142. struct mpc52xx_fec_priv *priv = netdev_priv(dev);
  143. struct phy_device *phydev = priv->phydev;
  144. int new_state = 0;
  145. if (phydev->link != PHY_DOWN) {
  146. if (phydev->duplex != priv->duplex) {
  147. struct mpc52xx_fec __iomem *fec = priv->fec;
  148. u32 rcntrl;
  149. u32 tcntrl;
  150. new_state = 1;
  151. priv->duplex = phydev->duplex;
  152. rcntrl = in_be32(&fec->r_cntrl);
  153. tcntrl = in_be32(&fec->x_cntrl);
  154. rcntrl &= ~FEC_RCNTRL_DRT;
  155. tcntrl &= ~FEC_TCNTRL_FDEN;
  156. if (phydev->duplex == DUPLEX_FULL)
  157. tcntrl |= FEC_TCNTRL_FDEN; /* FD enable */
  158. else
  159. rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */
  160. out_be32(&fec->r_cntrl, rcntrl);
  161. out_be32(&fec->x_cntrl, tcntrl);
  162. }
  163. if (phydev->speed != priv->speed) {
  164. new_state = 1;
  165. priv->speed = phydev->speed;
  166. }
  167. if (priv->link == PHY_DOWN) {
  168. new_state = 1;
  169. priv->link = phydev->link;
  170. }
  171. } else if (priv->link) {
  172. new_state = 1;
  173. priv->link = PHY_DOWN;
  174. priv->speed = 0;
  175. priv->duplex = -1;
  176. }
  177. if (new_state && netif_msg_link(priv))
  178. phy_print_status(phydev);
  179. }
  180. static int mpc52xx_fec_open(struct net_device *dev)
  181. {
  182. struct mpc52xx_fec_priv *priv = netdev_priv(dev);
  183. int err = -EBUSY;
  184. if (priv->phy_node) {
  185. priv->phydev = of_phy_connect(priv->ndev, priv->phy_node,
  186. mpc52xx_fec_adjust_link, 0, 0);
  187. if (!priv->phydev) {
  188. dev_err(&dev->dev, "of_phy_connect failed\n");
  189. return -ENODEV;
  190. }
  191. phy_start(priv->phydev);
  192. }
  193. if (request_irq(dev->irq, mpc52xx_fec_interrupt, IRQF_SHARED,
  194. DRIVER_NAME "_ctrl", dev)) {
  195. dev_err(&dev->dev, "ctrl interrupt request failed\n");
  196. goto free_phy;
  197. }
  198. if (request_irq(priv->r_irq, mpc52xx_fec_rx_interrupt, 0,
  199. DRIVER_NAME "_rx", dev)) {
  200. dev_err(&dev->dev, "rx interrupt request failed\n");
  201. goto free_ctrl_irq;
  202. }
  203. if (request_irq(priv->t_irq, mpc52xx_fec_tx_interrupt, 0,
  204. DRIVER_NAME "_tx", dev)) {
  205. dev_err(&dev->dev, "tx interrupt request failed\n");
  206. goto free_2irqs;
  207. }
  208. bcom_fec_rx_reset(priv->rx_dmatsk);
  209. bcom_fec_tx_reset(priv->tx_dmatsk);
  210. err = mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
  211. if (err) {
  212. dev_err(&dev->dev, "mpc52xx_fec_alloc_rx_buffers failed\n");
  213. goto free_irqs;
  214. }
  215. bcom_enable(priv->rx_dmatsk);
  216. bcom_enable(priv->tx_dmatsk);
  217. mpc52xx_fec_start(dev);
  218. netif_start_queue(dev);
  219. return 0;
  220. free_irqs:
  221. free_irq(priv->t_irq, dev);
  222. free_2irqs:
  223. free_irq(priv->r_irq, dev);
  224. free_ctrl_irq:
  225. free_irq(dev->irq, dev);
  226. free_phy:
  227. if (priv->phydev) {
  228. phy_stop(priv->phydev);
  229. phy_disconnect(priv->phydev);
  230. priv->phydev = NULL;
  231. }
  232. return err;
  233. }
  234. static int mpc52xx_fec_close(struct net_device *dev)
  235. {
  236. struct mpc52xx_fec_priv *priv = netdev_priv(dev);
  237. netif_stop_queue(dev);
  238. mpc52xx_fec_stop(dev);
  239. mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
  240. free_irq(dev->irq, dev);
  241. free_irq(priv->r_irq, dev);
  242. free_irq(priv->t_irq, dev);
  243. if (priv->phydev) {
  244. /* power down phy */
  245. phy_stop(priv->phydev);
  246. phy_disconnect(priv->phydev);
  247. priv->phydev = NULL;
  248. }
  249. return 0;
  250. }
  251. /* This will only be invoked if your driver is _not_ in XOFF state.
  252. * What this means is that you need not check it, and that this
  253. * invariant will hold if you make sure that the netif_*_queue()
  254. * calls are done at the proper times.
  255. */
  256. static int mpc52xx_fec_start_xmit(struct sk_buff *skb, struct net_device *dev)
  257. {
  258. struct mpc52xx_fec_priv *priv = netdev_priv(dev);
  259. struct bcom_fec_bd *bd;
  260. unsigned long flags;
  261. if (bcom_queue_full(priv->tx_dmatsk)) {
  262. if (net_ratelimit())
  263. dev_err(&dev->dev, "transmit queue overrun\n");
  264. return NETDEV_TX_BUSY;
  265. }
  266. spin_lock_irqsave(&priv->lock, flags);
  267. dev->trans_start = jiffies;
  268. bd = (struct bcom_fec_bd *)
  269. bcom_prepare_next_buffer(priv->tx_dmatsk);
  270. bd->status = skb->len | BCOM_FEC_TX_BD_TFD | BCOM_FEC_TX_BD_TC;
  271. bd->skb_pa = dma_map_single(dev->dev.parent, skb->data, skb->len,
  272. DMA_TO_DEVICE);
  273. bcom_submit_next_buffer(priv->tx_dmatsk, skb);
  274. spin_unlock_irqrestore(&priv->lock, flags);
  275. if (bcom_queue_full(priv->tx_dmatsk)) {
  276. netif_stop_queue(dev);
  277. }
  278. return NETDEV_TX_OK;
  279. }
  280. #ifdef CONFIG_NET_POLL_CONTROLLER
  281. static void mpc52xx_fec_poll_controller(struct net_device *dev)
  282. {
  283. struct mpc52xx_fec_priv *priv = netdev_priv(dev);
  284. disable_irq(priv->t_irq);
  285. mpc52xx_fec_tx_interrupt(priv->t_irq, dev);
  286. enable_irq(priv->t_irq);
  287. disable_irq(priv->r_irq);
  288. mpc52xx_fec_rx_interrupt(priv->r_irq, dev);
  289. enable_irq(priv->r_irq);
  290. }
  291. #endif
  292. /* This handles BestComm transmit task interrupts
  293. */
  294. static irqreturn_t mpc52xx_fec_tx_interrupt(int irq, void *dev_id)
  295. {
  296. struct net_device *dev = dev_id;
  297. struct mpc52xx_fec_priv *priv = netdev_priv(dev);
  298. unsigned long flags;
  299. spin_lock_irqsave(&priv->lock, flags);
  300. while (bcom_buffer_done(priv->tx_dmatsk)) {
  301. struct sk_buff *skb;
  302. struct bcom_fec_bd *bd;
  303. skb = bcom_retrieve_buffer(priv->tx_dmatsk, NULL,
  304. (struct bcom_bd **)&bd);
  305. dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len,
  306. DMA_TO_DEVICE);
  307. dev_kfree_skb_irq(skb);
  308. }
  309. spin_unlock_irqrestore(&priv->lock, flags);
  310. netif_wake_queue(dev);
  311. return IRQ_HANDLED;
  312. }
  313. static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id)
  314. {
  315. struct net_device *dev = dev_id;
  316. struct mpc52xx_fec_priv *priv = netdev_priv(dev);
  317. struct sk_buff *rskb; /* received sk_buff */
  318. struct sk_buff *skb; /* new sk_buff to enqueue in its place */
  319. struct bcom_fec_bd *bd;
  320. u32 status, physaddr;
  321. int length;
  322. unsigned long flags;
  323. spin_lock_irqsave(&priv->lock, flags);
  324. while (bcom_buffer_done(priv->rx_dmatsk)) {
  325. rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status,
  326. (struct bcom_bd **)&bd);
  327. physaddr = bd->skb_pa;
  328. /* Test for errors in received frame */
  329. if (status & BCOM_FEC_RX_BD_ERRORS) {
  330. /* Drop packet and reuse the buffer */
  331. mpc52xx_fec_rx_submit(dev, rskb);
  332. dev->stats.rx_dropped++;
  333. continue;
  334. }
  335. /* skbs are allocated on open, so now we allocate a new one,
  336. * and remove the old (with the packet) */
  337. skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
  338. if (!skb) {
  339. /* Can't get a new one : reuse the same & drop pkt */
  340. dev_notice(&dev->dev, "Low memory - dropped packet.\n");
  341. mpc52xx_fec_rx_submit(dev, rskb);
  342. dev->stats.rx_dropped++;
  343. continue;
  344. }
  345. /* Enqueue the new sk_buff back on the hardware */
  346. mpc52xx_fec_rx_submit(dev, skb);
  347. /* Process the received skb - Drop the spin lock while
  348. * calling into the network stack */
  349. spin_unlock_irqrestore(&priv->lock, flags);
  350. dma_unmap_single(dev->dev.parent, physaddr, rskb->len,
  351. DMA_FROM_DEVICE);
  352. length = status & BCOM_FEC_RX_BD_LEN_MASK;
  353. skb_put(rskb, length - 4); /* length without CRC32 */
  354. rskb->dev = dev;
  355. rskb->protocol = eth_type_trans(rskb, dev);
  356. netif_rx(rskb);
  357. spin_lock_irqsave(&priv->lock, flags);
  358. }
  359. spin_unlock_irqrestore(&priv->lock, flags);
  360. return IRQ_HANDLED;
  361. }
  362. static irqreturn_t mpc52xx_fec_interrupt(int irq, void *dev_id)
  363. {
  364. struct net_device *dev = dev_id;
  365. struct mpc52xx_fec_priv *priv = netdev_priv(dev);
  366. struct mpc52xx_fec __iomem *fec = priv->fec;
  367. u32 ievent;
  368. unsigned long flags;
  369. ievent = in_be32(&fec->ievent);
  370. ievent &= ~FEC_IEVENT_MII; /* mii is handled separately */
  371. if (!ievent)
  372. return IRQ_NONE;
  373. out_be32(&fec->ievent, ievent); /* clear pending events */
  374. /* on fifo error, soft-reset fec */
  375. if (ievent & (FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) {
  376. if (net_ratelimit() && (ievent & FEC_IEVENT_RFIFO_ERROR))
  377. dev_warn(&dev->dev, "FEC_IEVENT_RFIFO_ERROR\n");
  378. if (net_ratelimit() && (ievent & FEC_IEVENT_XFIFO_ERROR))
  379. dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n");
  380. spin_lock_irqsave(&priv->lock, flags);
  381. mpc52xx_fec_reset(dev);
  382. spin_unlock_irqrestore(&priv->lock, flags);
  383. return IRQ_HANDLED;
  384. }
  385. if (ievent & ~FEC_IEVENT_TFINT)
  386. dev_dbg(&dev->dev, "ievent: %08x\n", ievent);
  387. return IRQ_HANDLED;
  388. }
  389. /*
  390. * Get the current statistics.
  391. * This may be called with the card open or closed.
  392. */
  393. static struct net_device_stats *mpc52xx_fec_get_stats(struct net_device *dev)
  394. {
  395. struct mpc52xx_fec_priv *priv = netdev_priv(dev);
  396. struct net_device_stats *stats = &dev->stats;
  397. struct mpc52xx_fec __iomem *fec = priv->fec;
  398. stats->rx_bytes = in_be32(&fec->rmon_r_octets);
  399. stats->rx_packets = in_be32(&fec->rmon_r_packets);
  400. stats->rx_errors = in_be32(&fec->rmon_r_crc_align) +
  401. in_be32(&fec->rmon_r_undersize) +
  402. in_be32(&fec->rmon_r_oversize) +
  403. in_be32(&fec->rmon_r_frag) +
  404. in_be32(&fec->rmon_r_jab);
  405. stats->tx_bytes = in_be32(&fec->rmon_t_octets);
  406. stats->tx_packets = in_be32(&fec->rmon_t_packets);
  407. stats->tx_errors = in_be32(&fec->rmon_t_crc_align) +
  408. in_be32(&fec->rmon_t_undersize) +
  409. in_be32(&fec->rmon_t_oversize) +
  410. in_be32(&fec->rmon_t_frag) +
  411. in_be32(&fec->rmon_t_jab);
  412. stats->multicast = in_be32(&fec->rmon_r_mc_pkt);
  413. stats->collisions = in_be32(&fec->rmon_t_col);
  414. /* detailed rx_errors: */
  415. stats->rx_length_errors = in_be32(&fec->rmon_r_undersize)
  416. + in_be32(&fec->rmon_r_oversize)
  417. + in_be32(&fec->rmon_r_frag)
  418. + in_be32(&fec->rmon_r_jab);
  419. stats->rx_over_errors = in_be32(&fec->r_macerr);
  420. stats->rx_crc_errors = in_be32(&fec->ieee_r_crc);
  421. stats->rx_frame_errors = in_be32(&fec->ieee_r_align);
  422. stats->rx_fifo_errors = in_be32(&fec->rmon_r_drop);
  423. stats->rx_missed_errors = in_be32(&fec->rmon_r_drop);
  424. /* detailed tx_errors: */
  425. stats->tx_aborted_errors = 0;
  426. stats->tx_carrier_errors = in_be32(&fec->ieee_t_cserr);
  427. stats->tx_fifo_errors = in_be32(&fec->rmon_t_drop);
  428. stats->tx_heartbeat_errors = in_be32(&fec->ieee_t_sqe);
  429. stats->tx_window_errors = in_be32(&fec->ieee_t_lcol);
  430. return stats;
  431. }
  432. /*
  433. * Read MIB counters in order to reset them,
  434. * then zero all the stats fields in memory
  435. */
  436. static void mpc52xx_fec_reset_stats(struct net_device *dev)
  437. {
  438. struct mpc52xx_fec_priv *priv = netdev_priv(dev);
  439. struct mpc52xx_fec __iomem *fec = priv->fec;
  440. out_be32(&fec->mib_control, FEC_MIB_DISABLE);
  441. memset_io(&fec->rmon_t_drop, 0,
  442. offsetof(struct mpc52xx_fec, reserved10) -
  443. offsetof(struct mpc52xx_fec, rmon_t_drop));
  444. out_be32(&fec->mib_control, 0);
  445. memset(&dev->stats, 0, sizeof(dev->stats));
  446. }
  447. /*
  448. * Set or clear the multicast filter for this adaptor.
  449. */
  450. static void mpc52xx_fec_set_multicast_list(struct net_device *dev)
  451. {
  452. struct mpc52xx_fec_priv *priv = netdev_priv(dev);
  453. struct mpc52xx_fec __iomem *fec = priv->fec;
  454. u32 rx_control;
  455. rx_control = in_be32(&fec->r_cntrl);
  456. if (dev->flags & IFF_PROMISC) {
  457. rx_control |= FEC_RCNTRL_PROM;
  458. out_be32(&fec->r_cntrl, rx_control);
  459. } else {
  460. rx_control &= ~FEC_RCNTRL_PROM;
  461. out_be32(&fec->r_cntrl, rx_control);
  462. if (dev->flags & IFF_ALLMULTI) {
  463. out_be32(&fec->gaddr1, 0xffffffff);
  464. out_be32(&fec->gaddr2, 0xffffffff);
  465. } else {
  466. u32 crc;
  467. int i;
  468. struct dev_mc_list *dmi;
  469. u32 gaddr1 = 0x00000000;
  470. u32 gaddr2 = 0x00000000;
  471. dmi = dev->mc_list;
  472. for (i=0; i<dev->mc_count; i++) {
  473. crc = ether_crc_le(6, dmi->dmi_addr) >> 26;
  474. if (crc >= 32)
  475. gaddr1 |= 1 << (crc-32);
  476. else
  477. gaddr2 |= 1 << crc;
  478. dmi = dmi->next;
  479. }
  480. out_be32(&fec->gaddr1, gaddr1);
  481. out_be32(&fec->gaddr2, gaddr2);
  482. }
  483. }
  484. }
  485. /**
  486. * mpc52xx_fec_hw_init
  487. * @dev: network device
  488. *
  489. * Setup various hardware setting, only needed once on start
  490. */
  491. static void mpc52xx_fec_hw_init(struct net_device *dev)
  492. {
  493. struct mpc52xx_fec_priv *priv = netdev_priv(dev);
  494. struct mpc52xx_fec __iomem *fec = priv->fec;
  495. int i;
  496. /* Whack a reset. We should wait for this. */
  497. out_be32(&fec->ecntrl, FEC_ECNTRL_RESET);
  498. for (i = 0; i < FEC_RESET_DELAY; ++i) {
  499. if ((in_be32(&fec->ecntrl) & FEC_ECNTRL_RESET) == 0)
  500. break;
  501. udelay(1);
  502. }
  503. if (i == FEC_RESET_DELAY)
  504. dev_err(&dev->dev, "FEC Reset timeout!\n");
  505. /* set pause to 0x20 frames */
  506. out_be32(&fec->op_pause, FEC_OP_PAUSE_OPCODE | 0x20);
  507. /* high service request will be deasserted when there's < 7 bytes in fifo
  508. * low service request will be deasserted when there's < 4*7 bytes in fifo
  509. */
  510. out_be32(&fec->rfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
  511. out_be32(&fec->tfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
  512. /* alarm when <= x bytes in FIFO */
  513. out_be32(&fec->rfifo_alarm, 0x0000030c);
  514. out_be32(&fec->tfifo_alarm, 0x00000100);
  515. /* begin transmittion when 256 bytes are in FIFO (or EOF or FIFO full) */
  516. out_be32(&fec->x_wmrk, FEC_FIFO_WMRK_256B);
  517. /* enable crc generation */
  518. out_be32(&fec->xmit_fsm, FEC_XMIT_FSM_APPEND_CRC | FEC_XMIT_FSM_ENABLE_CRC);
  519. out_be32(&fec->iaddr1, 0x00000000); /* No individual filter */
  520. out_be32(&fec->iaddr2, 0x00000000); /* No individual filter */
  521. /* set phy speed.
  522. * this can't be done in phy driver, since it needs to be called
  523. * before fec stuff (even on resume) */
  524. out_be32(&fec->mii_speed, priv->mdio_speed);
  525. }
  526. /**
  527. * mpc52xx_fec_start
  528. * @dev: network device
  529. *
  530. * This function is called to start or restart the FEC during a link
  531. * change. This happens on fifo errors or when switching between half
  532. * and full duplex.
  533. */
  534. static void mpc52xx_fec_start(struct net_device *dev)
  535. {
  536. struct mpc52xx_fec_priv *priv = netdev_priv(dev);
  537. struct mpc52xx_fec __iomem *fec = priv->fec;
  538. u32 rcntrl;
  539. u32 tcntrl;
  540. u32 tmp;
  541. /* clear sticky error bits */
  542. tmp = FEC_FIFO_STATUS_ERR | FEC_FIFO_STATUS_UF | FEC_FIFO_STATUS_OF;
  543. out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status) & tmp);
  544. out_be32(&fec->tfifo_status, in_be32(&fec->tfifo_status) & tmp);
  545. /* FIFOs will reset on mpc52xx_fec_enable */
  546. out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_ENABLE_IS_RESET);
  547. /* Set station address. */
  548. mpc52xx_fec_set_paddr(dev, dev->dev_addr);
  549. mpc52xx_fec_set_multicast_list(dev);
  550. /* set max frame len, enable flow control, select mii mode */
  551. rcntrl = FEC_RX_BUFFER_SIZE << 16; /* max frame length */
  552. rcntrl |= FEC_RCNTRL_FCE;
  553. if (!priv->seven_wire_mode)
  554. rcntrl |= FEC_RCNTRL_MII_MODE;
  555. if (priv->duplex == DUPLEX_FULL)
  556. tcntrl = FEC_TCNTRL_FDEN; /* FD enable */
  557. else {
  558. rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */
  559. tcntrl = 0;
  560. }
  561. out_be32(&fec->r_cntrl, rcntrl);
  562. out_be32(&fec->x_cntrl, tcntrl);
  563. /* Clear any outstanding interrupt. */
  564. out_be32(&fec->ievent, 0xffffffff);
  565. /* Enable interrupts we wish to service. */
  566. out_be32(&fec->imask, FEC_IMASK_ENABLE);
  567. /* And last, enable the transmit and receive processing. */
  568. out_be32(&fec->ecntrl, FEC_ECNTRL_ETHER_EN);
  569. out_be32(&fec->r_des_active, 0x01000000);
  570. }
  571. /**
  572. * mpc52xx_fec_stop
  573. * @dev: network device
  574. *
  575. * stop all activity on fec and empty dma buffers
  576. */
  577. static void mpc52xx_fec_stop(struct net_device *dev)
  578. {
  579. struct mpc52xx_fec_priv *priv = netdev_priv(dev);
  580. struct mpc52xx_fec __iomem *fec = priv->fec;
  581. unsigned long timeout;
  582. /* disable all interrupts */
  583. out_be32(&fec->imask, 0);
  584. /* Disable the rx task. */
  585. bcom_disable(priv->rx_dmatsk);
  586. /* Wait for tx queue to drain, but only if we're in process context */
  587. if (!in_interrupt()) {
  588. timeout = jiffies + msecs_to_jiffies(2000);
  589. while (time_before(jiffies, timeout) &&
  590. !bcom_queue_empty(priv->tx_dmatsk))
  591. msleep(100);
  592. if (time_after_eq(jiffies, timeout))
  593. dev_err(&dev->dev, "queues didn't drain\n");
  594. #if 1
  595. if (time_after_eq(jiffies, timeout)) {
  596. dev_err(&dev->dev, " tx: index: %i, outdex: %i\n",
  597. priv->tx_dmatsk->index,
  598. priv->tx_dmatsk->outdex);
  599. dev_err(&dev->dev, " rx: index: %i, outdex: %i\n",
  600. priv->rx_dmatsk->index,
  601. priv->rx_dmatsk->outdex);
  602. }
  603. #endif
  604. }
  605. bcom_disable(priv->tx_dmatsk);
  606. /* Stop FEC */
  607. out_be32(&fec->ecntrl, in_be32(&fec->ecntrl) & ~FEC_ECNTRL_ETHER_EN);
  608. }
  609. /* reset fec and bestcomm tasks */
  610. static void mpc52xx_fec_reset(struct net_device *dev)
  611. {
  612. struct mpc52xx_fec_priv *priv = netdev_priv(dev);
  613. struct mpc52xx_fec __iomem *fec = priv->fec;
  614. mpc52xx_fec_stop(dev);
  615. out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status));
  616. out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_RESET_FIFO);
  617. mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
  618. mpc52xx_fec_hw_init(dev);
  619. bcom_fec_rx_reset(priv->rx_dmatsk);
  620. bcom_fec_tx_reset(priv->tx_dmatsk);
  621. mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
  622. bcom_enable(priv->rx_dmatsk);
  623. bcom_enable(priv->tx_dmatsk);
  624. mpc52xx_fec_start(dev);
  625. netif_wake_queue(dev);
  626. }
  627. /* ethtool interface */
  628. static void mpc52xx_fec_get_drvinfo(struct net_device *dev,
  629. struct ethtool_drvinfo *info)
  630. {
  631. strcpy(info->driver, DRIVER_NAME);
  632. }
  633. static int mpc52xx_fec_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
  634. {
  635. struct mpc52xx_fec_priv *priv = netdev_priv(dev);
  636. if (!priv->phydev)
  637. return -ENODEV;
  638. return phy_ethtool_gset(priv->phydev, cmd);
  639. }
  640. static int mpc52xx_fec_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
  641. {
  642. struct mpc52xx_fec_priv *priv = netdev_priv(dev);
  643. if (!priv->phydev)
  644. return -ENODEV;
  645. return phy_ethtool_sset(priv->phydev, cmd);
  646. }
  647. static u32 mpc52xx_fec_get_msglevel(struct net_device *dev)
  648. {
  649. struct mpc52xx_fec_priv *priv = netdev_priv(dev);
  650. return priv->msg_enable;
  651. }
  652. static void mpc52xx_fec_set_msglevel(struct net_device *dev, u32 level)
  653. {
  654. struct mpc52xx_fec_priv *priv = netdev_priv(dev);
  655. priv->msg_enable = level;
  656. }
  657. static const struct ethtool_ops mpc52xx_fec_ethtool_ops = {
  658. .get_drvinfo = mpc52xx_fec_get_drvinfo,
  659. .get_settings = mpc52xx_fec_get_settings,
  660. .set_settings = mpc52xx_fec_set_settings,
  661. .get_link = ethtool_op_get_link,
  662. .get_msglevel = mpc52xx_fec_get_msglevel,
  663. .set_msglevel = mpc52xx_fec_set_msglevel,
  664. };
  665. static int mpc52xx_fec_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
  666. {
  667. struct mpc52xx_fec_priv *priv = netdev_priv(dev);
  668. if (!priv->phydev)
  669. return -ENOTSUPP;
  670. return phy_mii_ioctl(priv->phydev, if_mii(rq), cmd);
  671. }
  672. static const struct net_device_ops mpc52xx_fec_netdev_ops = {
  673. .ndo_open = mpc52xx_fec_open,
  674. .ndo_stop = mpc52xx_fec_close,
  675. .ndo_start_xmit = mpc52xx_fec_start_xmit,
  676. .ndo_set_multicast_list = mpc52xx_fec_set_multicast_list,
  677. .ndo_set_mac_address = mpc52xx_fec_set_mac_address,
  678. .ndo_validate_addr = eth_validate_addr,
  679. .ndo_do_ioctl = mpc52xx_fec_ioctl,
  680. .ndo_change_mtu = eth_change_mtu,
  681. .ndo_tx_timeout = mpc52xx_fec_tx_timeout,
  682. .ndo_get_stats = mpc52xx_fec_get_stats,
  683. #ifdef CONFIG_NET_POLL_CONTROLLER
  684. .ndo_poll_controller = mpc52xx_fec_poll_controller,
  685. #endif
  686. };
  687. /* ======================================================================== */
  688. /* OF Driver */
  689. /* ======================================================================== */
  690. static int __devinit
  691. mpc52xx_fec_probe(struct of_device *op, const struct of_device_id *match)
  692. {
  693. int rv;
  694. struct net_device *ndev;
  695. struct mpc52xx_fec_priv *priv = NULL;
  696. struct resource mem;
  697. const u32 *prop;
  698. int prop_size;
  699. phys_addr_t rx_fifo;
  700. phys_addr_t tx_fifo;
  701. /* Get the ether ndev & it's private zone */
  702. ndev = alloc_etherdev(sizeof(struct mpc52xx_fec_priv));
  703. if (!ndev)
  704. return -ENOMEM;
  705. priv = netdev_priv(ndev);
  706. priv->ndev = ndev;
  707. /* Reserve FEC control zone */
  708. rv = of_address_to_resource(op->node, 0, &mem);
  709. if (rv) {
  710. printk(KERN_ERR DRIVER_NAME ": "
  711. "Error while parsing device node resource\n" );
  712. return rv;
  713. }
  714. if ((mem.end - mem.start + 1) < sizeof(struct mpc52xx_fec)) {
  715. printk(KERN_ERR DRIVER_NAME
  716. " - invalid resource size (%lx < %x), check mpc52xx_devices.c\n",
  717. (unsigned long)(mem.end - mem.start + 1), sizeof(struct mpc52xx_fec));
  718. return -EINVAL;
  719. }
  720. if (!request_mem_region(mem.start, sizeof(struct mpc52xx_fec), DRIVER_NAME))
  721. return -EBUSY;
  722. /* Init ether ndev with what we have */
  723. ndev->netdev_ops = &mpc52xx_fec_netdev_ops;
  724. ndev->ethtool_ops = &mpc52xx_fec_ethtool_ops;
  725. ndev->watchdog_timeo = FEC_WATCHDOG_TIMEOUT;
  726. ndev->base_addr = mem.start;
  727. SET_NETDEV_DEV(ndev, &op->dev);
  728. spin_lock_init(&priv->lock);
  729. /* ioremap the zones */
  730. priv->fec = ioremap(mem.start, sizeof(struct mpc52xx_fec));
  731. if (!priv->fec) {
  732. rv = -ENOMEM;
  733. goto probe_error;
  734. }
  735. /* Bestcomm init */
  736. rx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, rfifo_data);
  737. tx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, tfifo_data);
  738. priv->rx_dmatsk = bcom_fec_rx_init(FEC_RX_NUM_BD, rx_fifo, FEC_RX_BUFFER_SIZE);
  739. priv->tx_dmatsk = bcom_fec_tx_init(FEC_TX_NUM_BD, tx_fifo);
  740. if (!priv->rx_dmatsk || !priv->tx_dmatsk) {
  741. printk(KERN_ERR DRIVER_NAME ": Can not init SDMA tasks\n" );
  742. rv = -ENOMEM;
  743. goto probe_error;
  744. }
  745. /* Get the IRQ we need one by one */
  746. /* Control */
  747. ndev->irq = irq_of_parse_and_map(op->node, 0);
  748. /* RX */
  749. priv->r_irq = bcom_get_task_irq(priv->rx_dmatsk);
  750. /* TX */
  751. priv->t_irq = bcom_get_task_irq(priv->tx_dmatsk);
  752. /* MAC address init */
  753. if (!is_zero_ether_addr(mpc52xx_fec_mac_addr))
  754. memcpy(ndev->dev_addr, mpc52xx_fec_mac_addr, 6);
  755. else
  756. mpc52xx_fec_get_paddr(ndev, ndev->dev_addr);
  757. priv->msg_enable = netif_msg_init(debug, MPC52xx_MESSAGES_DEFAULT);
  758. /*
  759. * Link mode configuration
  760. */
  761. /* Start with safe defaults for link connection */
  762. priv->speed = 100;
  763. priv->duplex = DUPLEX_HALF;
  764. priv->mdio_speed = ((mpc5xxx_get_bus_frequency(op->node) >> 20) / 5) << 1;
  765. /* The current speed preconfigures the speed of the MII link */
  766. prop = of_get_property(op->node, "current-speed", &prop_size);
  767. if (prop && (prop_size >= sizeof(u32) * 2)) {
  768. priv->speed = prop[0];
  769. priv->duplex = prop[1] ? DUPLEX_FULL : DUPLEX_HALF;
  770. }
  771. /* If there is a phy handle, then get the PHY node */
  772. priv->phy_node = of_parse_phandle(op->node, "phy-handle", 0);
  773. /* the 7-wire property means don't use MII mode */
  774. if (of_find_property(op->node, "fsl,7-wire-mode", NULL)) {
  775. priv->seven_wire_mode = 1;
  776. dev_info(&ndev->dev, "using 7-wire PHY mode\n");
  777. }
  778. /* Hardware init */
  779. mpc52xx_fec_hw_init(ndev);
  780. mpc52xx_fec_reset_stats(ndev);
  781. rv = register_netdev(ndev);
  782. if (rv < 0)
  783. goto probe_error;
  784. /* We're done ! */
  785. dev_set_drvdata(&op->dev, ndev);
  786. return 0;
  787. /* Error handling - free everything that might be allocated */
  788. probe_error:
  789. if (priv->phy_node)
  790. of_node_put(priv->phy_node);
  791. priv->phy_node = NULL;
  792. irq_dispose_mapping(ndev->irq);
  793. if (priv->rx_dmatsk)
  794. bcom_fec_rx_release(priv->rx_dmatsk);
  795. if (priv->tx_dmatsk)
  796. bcom_fec_tx_release(priv->tx_dmatsk);
  797. if (priv->fec)
  798. iounmap(priv->fec);
  799. release_mem_region(mem.start, sizeof(struct mpc52xx_fec));
  800. free_netdev(ndev);
  801. return rv;
  802. }
  803. static int
  804. mpc52xx_fec_remove(struct of_device *op)
  805. {
  806. struct net_device *ndev;
  807. struct mpc52xx_fec_priv *priv;
  808. ndev = dev_get_drvdata(&op->dev);
  809. priv = netdev_priv(ndev);
  810. unregister_netdev(ndev);
  811. if (priv->phy_node)
  812. of_node_put(priv->phy_node);
  813. priv->phy_node = NULL;
  814. irq_dispose_mapping(ndev->irq);
  815. bcom_fec_rx_release(priv->rx_dmatsk);
  816. bcom_fec_tx_release(priv->tx_dmatsk);
  817. iounmap(priv->fec);
  818. release_mem_region(ndev->base_addr, sizeof(struct mpc52xx_fec));
  819. free_netdev(ndev);
  820. dev_set_drvdata(&op->dev, NULL);
  821. return 0;
  822. }
  823. #ifdef CONFIG_PM
  824. static int mpc52xx_fec_of_suspend(struct of_device *op, pm_message_t state)
  825. {
  826. struct net_device *dev = dev_get_drvdata(&op->dev);
  827. if (netif_running(dev))
  828. mpc52xx_fec_close(dev);
  829. return 0;
  830. }
  831. static int mpc52xx_fec_of_resume(struct of_device *op)
  832. {
  833. struct net_device *dev = dev_get_drvdata(&op->dev);
  834. mpc52xx_fec_hw_init(dev);
  835. mpc52xx_fec_reset_stats(dev);
  836. if (netif_running(dev))
  837. mpc52xx_fec_open(dev);
  838. return 0;
  839. }
  840. #endif
  841. static struct of_device_id mpc52xx_fec_match[] = {
  842. { .compatible = "fsl,mpc5200b-fec", },
  843. { .compatible = "fsl,mpc5200-fec", },
  844. { .compatible = "mpc5200-fec", },
  845. { }
  846. };
  847. MODULE_DEVICE_TABLE(of, mpc52xx_fec_match);
  848. static struct of_platform_driver mpc52xx_fec_driver = {
  849. .owner = THIS_MODULE,
  850. .name = DRIVER_NAME,
  851. .match_table = mpc52xx_fec_match,
  852. .probe = mpc52xx_fec_probe,
  853. .remove = mpc52xx_fec_remove,
  854. #ifdef CONFIG_PM
  855. .suspend = mpc52xx_fec_of_suspend,
  856. .resume = mpc52xx_fec_of_resume,
  857. #endif
  858. };
  859. /* ======================================================================== */
  860. /* Module */
  861. /* ======================================================================== */
  862. static int __init
  863. mpc52xx_fec_init(void)
  864. {
  865. #ifdef CONFIG_FEC_MPC52xx_MDIO
  866. int ret;
  867. ret = of_register_platform_driver(&mpc52xx_fec_mdio_driver);
  868. if (ret) {
  869. printk(KERN_ERR DRIVER_NAME ": failed to register mdio driver\n");
  870. return ret;
  871. }
  872. #endif
  873. return of_register_platform_driver(&mpc52xx_fec_driver);
  874. }
  875. static void __exit
  876. mpc52xx_fec_exit(void)
  877. {
  878. of_unregister_platform_driver(&mpc52xx_fec_driver);
  879. #ifdef CONFIG_FEC_MPC52xx_MDIO
  880. of_unregister_platform_driver(&mpc52xx_fec_mdio_driver);
  881. #endif
  882. }
  883. module_init(mpc52xx_fec_init);
  884. module_exit(mpc52xx_fec_exit);
  885. MODULE_LICENSE("GPL");
  886. MODULE_AUTHOR("Dale Farnsworth");
  887. MODULE_DESCRIPTION("Ethernet driver for the Freescale MPC52xx FEC");