netx-eth.c 14 KB

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  1. /*
  2. * drivers/net/netx-eth.c
  3. *
  4. * Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
  5. *
  6. * This program is free software; you can redistribute it and/or modify
  7. * it under the terms of the GNU General Public License version 2
  8. * as published by the Free Software Foundation.
  9. *
  10. * This program is distributed in the hope that it will be useful,
  11. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13. * GNU General Public License for more details.
  14. *
  15. * You should have received a copy of the GNU General Public License
  16. * along with this program; if not, write to the Free Software
  17. * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  18. */
  19. #include <linux/init.h>
  20. #include <linux/module.h>
  21. #include <linux/kernel.h>
  22. #include <linux/delay.h>
  23. #include <linux/netdevice.h>
  24. #include <linux/platform_device.h>
  25. #include <linux/etherdevice.h>
  26. #include <linux/skbuff.h>
  27. #include <linux/mii.h>
  28. #include <asm/io.h>
  29. #include <asm/hardware.h>
  30. #include <asm/arch/hardware.h>
  31. #include <asm/arch/netx-regs.h>
  32. #include <asm/arch/pfifo.h>
  33. #include <asm/arch/xc.h>
  34. #include <asm/arch/eth.h>
  35. /* XC Fifo Offsets */
  36. #define EMPTY_PTR_FIFO(xcno) (0 + ((xcno) << 3)) /* Index of the empty pointer FIFO */
  37. #define IND_FIFO_PORT_HI(xcno) (1 + ((xcno) << 3)) /* Index of the FIFO where received */
  38. /* Data packages are indicated by XC */
  39. #define IND_FIFO_PORT_LO(xcno) (2 + ((xcno) << 3)) /* Index of the FIFO where received */
  40. /* Data packages are indicated by XC */
  41. #define REQ_FIFO_PORT_HI(xcno) (3 + ((xcno) << 3)) /* Index of the FIFO where Data packages */
  42. /* have to be indicated by ARM which */
  43. /* shall be sent */
  44. #define REQ_FIFO_PORT_LO(xcno) (4 + ((xcno) << 3)) /* Index of the FIFO where Data packages */
  45. /* have to be indicated by ARM which shall */
  46. /* be sent */
  47. #define CON_FIFO_PORT_HI(xcno) (5 + ((xcno) << 3)) /* Index of the FIFO where sent Data packages */
  48. /* are confirmed */
  49. #define CON_FIFO_PORT_LO(xcno) (6 + ((xcno) << 3)) /* Index of the FIFO where sent Data */
  50. /* packages are confirmed */
  51. #define PFIFO_MASK(xcno) (0x7f << (xcno*8))
  52. #define FIFO_PTR_FRAMELEN_SHIFT 0
  53. #define FIFO_PTR_FRAMELEN_MASK (0x7ff << 0)
  54. #define FIFO_PTR_FRAMELEN(len) (((len) << 0) & FIFO_PTR_FRAMELEN_MASK)
  55. #define FIFO_PTR_TIMETRIG (1<<11)
  56. #define FIFO_PTR_MULTI_REQ
  57. #define FIFO_PTR_ORIGIN (1<<14)
  58. #define FIFO_PTR_VLAN (1<<15)
  59. #define FIFO_PTR_FRAMENO_SHIFT 16
  60. #define FIFO_PTR_FRAMENO_MASK (0x3f << 16)
  61. #define FIFO_PTR_FRAMENO(no) (((no) << 16) & FIFO_PTR_FRAMENO_MASK)
  62. #define FIFO_PTR_SEGMENT_SHIFT 22
  63. #define FIFO_PTR_SEGMENT_MASK (0xf << 22)
  64. #define FIFO_PTR_SEGMENT(seg) (((seg) & 0xf) << 22)
  65. #define FIFO_PTR_ERROR_SHIFT 28
  66. #define FIFO_PTR_ERROR_MASK (0xf << 28)
  67. #define ISR_LINK_STATUS_CHANGE (1<<4)
  68. #define ISR_IND_LO (1<<3)
  69. #define ISR_CON_LO (1<<2)
  70. #define ISR_IND_HI (1<<1)
  71. #define ISR_CON_HI (1<<0)
  72. #define ETH_MAC_LOCAL_CONFIG 0x1560
  73. #define ETH_MAC_4321 0x1564
  74. #define ETH_MAC_65 0x1568
  75. #define MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT 16
  76. #define MAC_TRAFFIC_CLASS_ARRANGEMENT_MASK (0xf<<MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT)
  77. #define MAC_TRAFFIC_CLASS_ARRANGEMENT(x) (((x)<<MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT) & MAC_TRAFFIC_CLASS_ARRANGEMENT_MASK)
  78. #define LOCAL_CONFIG_LINK_STATUS_IRQ_EN (1<<24)
  79. #define LOCAL_CONFIG_CON_LO_IRQ_EN (1<<23)
  80. #define LOCAL_CONFIG_CON_HI_IRQ_EN (1<<22)
  81. #define LOCAL_CONFIG_IND_LO_IRQ_EN (1<<21)
  82. #define LOCAL_CONFIG_IND_HI_IRQ_EN (1<<20)
  83. #define CARDNAME "netx-eth"
  84. /* LSB must be zero */
  85. #define INTERNAL_PHY_ADR 0x1c
  86. struct netx_eth_priv {
  87. void __iomem *sram_base, *xpec_base, *xmac_base;
  88. int id;
  89. struct net_device_stats stats;
  90. struct mii_if_info mii;
  91. u32 msg_enable;
  92. struct xc *xc;
  93. spinlock_t lock;
  94. };
  95. static void netx_eth_set_multicast_list(struct net_device *ndev)
  96. {
  97. /* implement me */
  98. }
  99. static int
  100. netx_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev)
  101. {
  102. struct netx_eth_priv *priv = netdev_priv(ndev);
  103. unsigned char *buf = skb->data;
  104. unsigned int len = skb->len;
  105. spin_lock_irq(&priv->lock);
  106. memcpy_toio(priv->sram_base + 1560, (void *)buf, len);
  107. if (len < 60) {
  108. memset_io(priv->sram_base + 1560 + len, 0, 60 - len);
  109. len = 60;
  110. }
  111. pfifo_push(REQ_FIFO_PORT_LO(priv->id),
  112. FIFO_PTR_SEGMENT(priv->id) |
  113. FIFO_PTR_FRAMENO(1) |
  114. FIFO_PTR_FRAMELEN(len));
  115. ndev->trans_start = jiffies;
  116. priv->stats.tx_packets++;
  117. priv->stats.tx_bytes += skb->len;
  118. netif_stop_queue(ndev);
  119. spin_unlock_irq(&priv->lock);
  120. dev_kfree_skb(skb);
  121. return 0;
  122. }
  123. static void netx_eth_receive(struct net_device *ndev)
  124. {
  125. struct netx_eth_priv *priv = netdev_priv(ndev);
  126. unsigned int val, frameno, seg, len;
  127. unsigned char *data;
  128. struct sk_buff *skb;
  129. val = pfifo_pop(IND_FIFO_PORT_LO(priv->id));
  130. frameno = (val & FIFO_PTR_FRAMENO_MASK) >> FIFO_PTR_FRAMENO_SHIFT;
  131. seg = (val & FIFO_PTR_SEGMENT_MASK) >> FIFO_PTR_SEGMENT_SHIFT;
  132. len = (val & FIFO_PTR_FRAMELEN_MASK) >> FIFO_PTR_FRAMELEN_SHIFT;
  133. skb = dev_alloc_skb(len);
  134. if (unlikely(skb == NULL)) {
  135. printk(KERN_NOTICE "%s: Low memory, packet dropped.\n",
  136. ndev->name);
  137. priv->stats.rx_dropped++;
  138. return;
  139. }
  140. data = skb_put(skb, len);
  141. memcpy_fromio(data, priv->sram_base + frameno * 1560, len);
  142. pfifo_push(EMPTY_PTR_FIFO(priv->id),
  143. FIFO_PTR_SEGMENT(seg) | FIFO_PTR_FRAMENO(frameno));
  144. ndev->last_rx = jiffies;
  145. skb->dev = ndev;
  146. skb->protocol = eth_type_trans(skb, ndev);
  147. netif_rx(skb);
  148. priv->stats.rx_packets++;
  149. priv->stats.rx_bytes += len;
  150. }
  151. static irqreturn_t
  152. netx_eth_interrupt(int irq, void *dev_id)
  153. {
  154. struct net_device *ndev = dev_id;
  155. struct netx_eth_priv *priv = netdev_priv(ndev);
  156. int status;
  157. unsigned long flags;
  158. spin_lock_irqsave(&priv->lock, flags);
  159. status = readl(NETX_PFIFO_XPEC_ISR(priv->id));
  160. while (status) {
  161. int fill_level;
  162. writel(status, NETX_PFIFO_XPEC_ISR(priv->id));
  163. if ((status & ISR_CON_HI) || (status & ISR_IND_HI))
  164. printk("%s: unexpected status: 0x%08x\n",
  165. __FUNCTION__, status);
  166. fill_level =
  167. readl(NETX_PFIFO_FILL_LEVEL(IND_FIFO_PORT_LO(priv->id)));
  168. while (fill_level--)
  169. netx_eth_receive(ndev);
  170. if (status & ISR_CON_LO)
  171. netif_wake_queue(ndev);
  172. if (status & ISR_LINK_STATUS_CHANGE)
  173. mii_check_media(&priv->mii, netif_msg_link(priv), 1);
  174. status = readl(NETX_PFIFO_XPEC_ISR(priv->id));
  175. }
  176. spin_unlock_irqrestore(&priv->lock, flags);
  177. return IRQ_HANDLED;
  178. }
  179. static struct net_device_stats *netx_eth_query_statistics(struct net_device *ndev)
  180. {
  181. struct netx_eth_priv *priv = netdev_priv(ndev);
  182. return &priv->stats;
  183. }
  184. static int netx_eth_open(struct net_device *ndev)
  185. {
  186. struct netx_eth_priv *priv = netdev_priv(ndev);
  187. if (request_irq
  188. (ndev->irq, &netx_eth_interrupt, IRQF_SHARED, ndev->name, ndev))
  189. return -EAGAIN;
  190. writel(ndev->dev_addr[0] |
  191. ndev->dev_addr[1]<<8 |
  192. ndev->dev_addr[2]<<16 |
  193. ndev->dev_addr[3]<<24,
  194. priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_4321);
  195. writel(ndev->dev_addr[4] |
  196. ndev->dev_addr[5]<<8,
  197. priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_65);
  198. writel(LOCAL_CONFIG_LINK_STATUS_IRQ_EN |
  199. LOCAL_CONFIG_CON_LO_IRQ_EN |
  200. LOCAL_CONFIG_CON_HI_IRQ_EN |
  201. LOCAL_CONFIG_IND_LO_IRQ_EN |
  202. LOCAL_CONFIG_IND_HI_IRQ_EN,
  203. priv->xpec_base + NETX_XPEC_RAM_START_OFS +
  204. ETH_MAC_LOCAL_CONFIG);
  205. mii_check_media(&priv->mii, netif_msg_link(priv), 1);
  206. netif_start_queue(ndev);
  207. return 0;
  208. }
  209. static int netx_eth_close(struct net_device *ndev)
  210. {
  211. struct netx_eth_priv *priv = netdev_priv(ndev);
  212. netif_stop_queue(ndev);
  213. writel(0,
  214. priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_LOCAL_CONFIG);
  215. free_irq(ndev->irq, ndev);
  216. return 0;
  217. }
  218. static void netx_eth_timeout(struct net_device *ndev)
  219. {
  220. struct netx_eth_priv *priv = netdev_priv(ndev);
  221. int i;
  222. printk(KERN_ERR "%s: transmit timed out, resetting\n", ndev->name);
  223. spin_lock_irq(&priv->lock);
  224. xc_reset(priv->xc);
  225. xc_start(priv->xc);
  226. for (i=2; i<=18; i++)
  227. pfifo_push(EMPTY_PTR_FIFO(priv->id),
  228. FIFO_PTR_FRAMENO(i) | FIFO_PTR_SEGMENT(priv->id));
  229. spin_unlock_irq(&priv->lock);
  230. netif_wake_queue(ndev);
  231. }
  232. static int
  233. netx_eth_phy_read(struct net_device *ndev, int phy_id, int reg)
  234. {
  235. unsigned int val;
  236. val = MIIMU_SNRDY | MIIMU_PREAMBLE | MIIMU_PHYADDR(phy_id) |
  237. MIIMU_REGADDR(reg) | MIIMU_PHY_NRES;
  238. writel(val, NETX_MIIMU);
  239. while (readl(NETX_MIIMU) & MIIMU_SNRDY);
  240. return readl(NETX_MIIMU) >> 16;
  241. }
  242. static void
  243. netx_eth_phy_write(struct net_device *ndev, int phy_id, int reg, int value)
  244. {
  245. unsigned int val;
  246. val = MIIMU_SNRDY | MIIMU_PREAMBLE | MIIMU_PHYADDR(phy_id) |
  247. MIIMU_REGADDR(reg) | MIIMU_PHY_NRES | MIIMU_OPMODE_WRITE |
  248. MIIMU_DATA(value);
  249. writel(val, NETX_MIIMU);
  250. while (readl(NETX_MIIMU) & MIIMU_SNRDY);
  251. }
  252. static int netx_eth_enable(struct net_device *ndev)
  253. {
  254. struct netx_eth_priv *priv = netdev_priv(ndev);
  255. unsigned int mac4321, mac65;
  256. int running, i;
  257. ether_setup(ndev);
  258. ndev->open = netx_eth_open;
  259. ndev->stop = netx_eth_close;
  260. ndev->hard_start_xmit = netx_eth_hard_start_xmit;
  261. ndev->tx_timeout = netx_eth_timeout;
  262. ndev->watchdog_timeo = msecs_to_jiffies(5000);
  263. ndev->get_stats = netx_eth_query_statistics;
  264. ndev->set_multicast_list = netx_eth_set_multicast_list;
  265. priv->msg_enable = NETIF_MSG_LINK;
  266. priv->mii.phy_id_mask = 0x1f;
  267. priv->mii.reg_num_mask = 0x1f;
  268. priv->mii.force_media = 0;
  269. priv->mii.full_duplex = 0;
  270. priv->mii.dev = ndev;
  271. priv->mii.mdio_read = netx_eth_phy_read;
  272. priv->mii.mdio_write = netx_eth_phy_write;
  273. priv->mii.phy_id = INTERNAL_PHY_ADR + priv->id;
  274. running = xc_running(priv->xc);
  275. xc_stop(priv->xc);
  276. /* if the xc engine is already running, assume the bootloader has
  277. * loaded the firmware for us
  278. */
  279. if (running) {
  280. /* get Node Address from hardware */
  281. mac4321 = readl(priv->xpec_base +
  282. NETX_XPEC_RAM_START_OFS + ETH_MAC_4321);
  283. mac65 = readl(priv->xpec_base +
  284. NETX_XPEC_RAM_START_OFS + ETH_MAC_65);
  285. ndev->dev_addr[0] = mac4321 & 0xff;
  286. ndev->dev_addr[1] = (mac4321 >> 8) & 0xff;
  287. ndev->dev_addr[2] = (mac4321 >> 16) & 0xff;
  288. ndev->dev_addr[3] = (mac4321 >> 24) & 0xff;
  289. ndev->dev_addr[4] = mac65 & 0xff;
  290. ndev->dev_addr[5] = (mac65 >> 8) & 0xff;
  291. } else {
  292. if (xc_request_firmware(priv->xc)) {
  293. printk(CARDNAME ": requesting firmware failed\n");
  294. return -ENODEV;
  295. }
  296. }
  297. xc_reset(priv->xc);
  298. xc_start(priv->xc);
  299. if (!is_valid_ether_addr(ndev->dev_addr))
  300. printk("%s: Invalid ethernet MAC address. Please "
  301. "set using ifconfig\n", ndev->name);
  302. for (i=2; i<=18; i++)
  303. pfifo_push(EMPTY_PTR_FIFO(priv->id),
  304. FIFO_PTR_FRAMENO(i) | FIFO_PTR_SEGMENT(priv->id));
  305. return register_netdev(ndev);
  306. }
  307. static int netx_eth_drv_probe(struct platform_device *pdev)
  308. {
  309. struct netx_eth_priv *priv;
  310. struct net_device *ndev;
  311. struct netxeth_platform_data *pdata;
  312. int ret;
  313. ndev = alloc_etherdev(sizeof (struct netx_eth_priv));
  314. if (!ndev) {
  315. printk("%s: could not allocate device.\n", CARDNAME);
  316. ret = -ENOMEM;
  317. goto exit;
  318. }
  319. SET_MODULE_OWNER(ndev);
  320. SET_NETDEV_DEV(ndev, &pdev->dev);
  321. platform_set_drvdata(pdev, ndev);
  322. priv = netdev_priv(ndev);
  323. pdata = (struct netxeth_platform_data *)pdev->dev.platform_data;
  324. priv->xc = request_xc(pdata->xcno, &pdev->dev);
  325. if (!priv->xc) {
  326. dev_err(&pdev->dev, "unable to request xc engine\n");
  327. ret = -ENODEV;
  328. goto exit_free_netdev;
  329. }
  330. ndev->irq = priv->xc->irq;
  331. priv->id = pdev->id;
  332. priv->xpec_base = priv->xc->xpec_base;
  333. priv->xmac_base = priv->xc->xmac_base;
  334. priv->sram_base = priv->xc->sram_base;
  335. ret = pfifo_request(PFIFO_MASK(priv->id));
  336. if (ret) {
  337. printk("unable to request PFIFO\n");
  338. goto exit_free_xc;
  339. }
  340. ret = netx_eth_enable(ndev);
  341. if (ret)
  342. goto exit_free_pfifo;
  343. return 0;
  344. exit_free_pfifo:
  345. pfifo_free(PFIFO_MASK(priv->id));
  346. exit_free_xc:
  347. free_xc(priv->xc);
  348. exit_free_netdev:
  349. platform_set_drvdata(pdev, NULL);
  350. free_netdev(ndev);
  351. exit:
  352. return ret;
  353. }
  354. static int netx_eth_drv_remove(struct platform_device *pdev)
  355. {
  356. struct net_device *ndev = dev_get_drvdata(&pdev->dev);
  357. struct netx_eth_priv *priv = netdev_priv(ndev);
  358. platform_set_drvdata(pdev, NULL);
  359. unregister_netdev(ndev);
  360. xc_stop(priv->xc);
  361. free_xc(priv->xc);
  362. free_netdev(ndev);
  363. pfifo_free(PFIFO_MASK(priv->id));
  364. return 0;
  365. }
  366. static int netx_eth_drv_suspend(struct platform_device *pdev, pm_message_t state)
  367. {
  368. dev_err(&pdev->dev, "suspend not implemented\n");
  369. return 0;
  370. }
  371. static int netx_eth_drv_resume(struct platform_device *pdev)
  372. {
  373. dev_err(&pdev->dev, "resume not implemented\n");
  374. return 0;
  375. }
  376. static struct platform_driver netx_eth_driver = {
  377. .probe = netx_eth_drv_probe,
  378. .remove = netx_eth_drv_remove,
  379. .suspend = netx_eth_drv_suspend,
  380. .resume = netx_eth_drv_resume,
  381. .driver = {
  382. .name = CARDNAME,
  383. .owner = THIS_MODULE,
  384. },
  385. };
  386. static int __init netx_eth_init(void)
  387. {
  388. unsigned int phy_control, val;
  389. printk("NetX Ethernet driver\n");
  390. phy_control = PHY_CONTROL_PHY_ADDRESS(INTERNAL_PHY_ADR>>1) |
  391. PHY_CONTROL_PHY1_MODE(PHY_MODE_ALL) |
  392. PHY_CONTROL_PHY1_AUTOMDIX |
  393. PHY_CONTROL_PHY1_EN |
  394. PHY_CONTROL_PHY0_MODE(PHY_MODE_ALL) |
  395. PHY_CONTROL_PHY0_AUTOMDIX |
  396. PHY_CONTROL_PHY0_EN |
  397. PHY_CONTROL_CLK_XLATIN;
  398. val = readl(NETX_SYSTEM_IOC_ACCESS_KEY);
  399. writel(val, NETX_SYSTEM_IOC_ACCESS_KEY);
  400. writel(phy_control | PHY_CONTROL_RESET, NETX_SYSTEM_PHY_CONTROL);
  401. udelay(100);
  402. val = readl(NETX_SYSTEM_IOC_ACCESS_KEY);
  403. writel(val, NETX_SYSTEM_IOC_ACCESS_KEY);
  404. writel(phy_control, NETX_SYSTEM_PHY_CONTROL);
  405. return platform_driver_register(&netx_eth_driver);
  406. }
  407. static void __exit netx_eth_cleanup(void)
  408. {
  409. platform_driver_unregister(&netx_eth_driver);
  410. }
  411. module_init(netx_eth_init);
  412. module_exit(netx_eth_cleanup);
  413. MODULE_AUTHOR("Sascha Hauer, Pengutronix");
  414. MODULE_LICENSE("GPL");